• 专利附录
  • 专利说明
  • 权利要求
  • 类似技术
  • 同族专利
  • 引用文献
  • 法律状态
  • 优先权
    • 专利摘要:
    The invention provides a mold core and injection molding apparatus for the production of a preform using a mold core comprising, in the region for defining the neck portion of the preform, a combination of a raised portion and a shallow groove having a depth of 0.01-1. mm provided in the raised portion, for defining an internal fastener in the neck of the preform. The invention also provides a preform and a container made from the preform, with internal fastener in the neck. The internal fastener is rotationally symmetrical with respect to the longitudinal axis of the preform. The combinations with an insert, preferably a pouring spout, flexible hose or dosing cap, has also been described. Furthermore, the invention provides an injection molding method for preform production and a stretch blow method for container production.
    公开号:BE1026310B1
    申请号:E20195414
    申请日:2019-06-27
    公开日:2019-12-18
    发明作者:Cuyper Dirk De；William Dierickx；Tom Anthierens；Jesus Aldaya
    申请人:Resilux Nv；
    IPC主号:
    专利说明:

    FORM AND CONTAINER FURNISHED FOR RECORDING AN INSERT, WITH METHODS AND APPARATUS FOR THEIR PRODUCTION
    TECHNICAL FIELD
    The invention is situated in the domain of the packages, more particularly in the domain of containers obtained by stretch blowing on the basis of a preform obtained by injection molding. The invention is advantageous for use in the packaging of foodstuffs, such as drinks and oils; household products such as detergents and fabric softeners; food such as oil; chemical products such as fuel additives, spray substances, plant food.
    BACKGROUND
    Packaging containers equipped with a pouring spout and dosing cap are generally known. The pouring spout enables easy pouring of a liquid. The pouring of a liquid into a dosing cap facilitates measuring off a desired amount of product.
    Various methods are known for providing a packaging container with pouring spout and dosing cap. A commonly used method is to provide a thread on the neck of the container for receiving the spout, and to provide a thread on the neck of the spout for receiving a dosing cap. This configuration requires a structure that extends far above the container. This is not advantageous when stacking containers.
    The threads are typically provided externally on the neck of the container. This entails more material consumption than if one could work internally.
    Alternative embodiments have attempted to secure the spout within the neck of the container. Providing an internal thread is technically possible, but it requires additional production steps and equipment.
    BE2019 / 5414
    EP 0 184 264 describes an extrusion method for blow molding a container with internal thread. An expandable and retractable mold core is used to compress the interior of the neck portion. The embodiment in Figure 8 with a peripheral flange is not considered feasible because the configuration does not allow the flange to be introduced into the lower recess. In addition, the storage of liquids requires that the take-up of the pouring spout be liquid-tight.
    US 2011/031559 describes a separate tool (42) for applying additional features to the inner part of the neck by induction heating, after production.
    US 2005/0139569 describes the use of a rotating disk to still modify the inner part of the neck after production in the neck part of a preform.
    The above methods require complex tools. Changing the neck after production means that an extra step must be provided. This is time-consuming and therefore costly.
    US 2005/0139609 describes an insert with pouring spout wherein the peripheral flange is placed on top of the container edge and serves as a stopping means. The insert is attached by clamping. Hereby the widest upper part gets stuck. Reinforcement ribs (24) are provided on the bottom (18) of the insert. For the production of the container, preference is given to extrusion blow molding and high density polyethylene. The insert is preferably combined with a blown internal thread. It is not stated whether the clamped part is liquid-tight.
    There is therefore a need for further alternatives and improvements.
    The present invention has for its object to provide a solution for one or more of the aforementioned problems.
    The present invention has for its object to provide a method that makes the production of containers with internal fasteners simpler, less expensive and more reliable.
    BE2019 / 5414
    A further object of the invention is to provide an improved container / insert combination. Here, the invention particularly wants to provide a non-permanent, but liquid-tight connection. The invention therefore also focuses on the components.
    SUMMARY OF THE INVENTION
    The present invention provides a method according to claim 1, for producing a preform with an internal fastener suitable for use in a stretch blow process to form a container that can receive a spout.
    The present invention provides a preform with an internal fastener suitable for use in a stretch blow process to form a container that can receive a spout, as described in claim 2.
    The present invention also provides in claim 6 a stretch blow process using a preform or injection molding process for obtaining a preform, according to an embodiment of the invention.
    In a further aspect the invention provides a container with a neck part provided with an internal fastening means, according to claim 7.
    In yet a further aspect, the invention provides a combination of a container and an insert, according to claim 9.
    In a further aspect, the invention provides an injection molding apparatus for the production of a preform according to an embodiment of the invention. The injection molding apparatus is described in claim 13.
    In a final aspect, an insert is provided for combination with a container according to an embodiment of the invention. The insert is described in claim 17.
    Preferred forms were elaborated in the dependent claims.
    BE2019 / 5414
    DESCRIPTION OF THE FIGURES
    The invention is illustrated with reference to Figures. These are not restrictive. Preferred forms of the invention are illustrated in Figures 1 to 6.
    Figure 1 gives a schematic representation of a mold core according to an embodiment of the invention for use in an injection molding apparatus for the production of container preforms (1: 1 scale). Figure 1 A shows a schematic section. Figure 1B schematically depicts the outside. Figure 1 C is a three-dimensional representation.
    Figure 2 shows a schematic section of a mold for the production of a preform according to an embodiment of the invention. The mold is formed by a mold core accommodated in a mold (1: 1 scale). Figure 2 A gives an overview, while Figure 2 B shows a detailed representation (scale 10: 1) of the provisions on the mold core to form a preform with an internal fastener according to the invention.
    Figure 3 gives a schematic representation of a preform according to an embodiment of the invention. Figure 3 A shows a schematic section. Figure 3B schematically depicts the outside. Figure 3 C is a three-dimensional representation.
    Figure 4 gives a schematic representation of a preform according to an embodiment of the invention mounted on a mold core of an injection molding apparatus (1: 1 scale). Figure 4 A shows a schematic section. Figure 4B schematically depicts the outside. Figures 4 C and 4 D are three-dimensional representations.
    Figure 5 is a detailed view of an internal fastener on the wall of the preform with the corresponding features on the mold core, scale 10: 1.
    Figure 6 shows a schematic representation of a fastener according to an embodiment of the invention.
    BE2019 / 5414
    DETAILED DESCRIPTION OF THE INVENTION
    The invention provides a solution to the problem of obtaining containers that are suitable for receiving an insert, preferably a pouring spout, without excessive use of raw material and without the use of a complex production technique or complicated fittings.
    Unless defined otherwise, all terms used in the description of the invention, including technical and scientific terms, have the meaning generally understood by one skilled in the art to which this invention relates. Furthermore, definitions of the terms are included to better understand the description of the present invention.
    As used herein, the following terms have the following meaning: One, the and the as used here, refer to both the singular and the plural, unless the context indicates otherwise. A compartment refers, by way of example, to one or more than one compartment.
    Approximately as used herein, which refers to a measurable value such as a parameter, an amount, a duration and the like, is intended to include variations of +/- 20% or less, preferably +/- 10% or less, more at preferably +/- 5% or less, even more preferably +/- 1% or less, and even more preferably +/- 0.1% or less of the specified value, insofar as such variations are suitable for execution in the described invention. It will be clear, however, that the value to which the term roughly refers, is also specifically described. Including, including and including and consisting of as used herein, are synonymous with contain, contain or contain, and are inclusive or open terms specifying the presence of what follows, e.g., a component and the presence of additional, non-named components, features, elements, parts, steps, which are well known in the art or described therein, and do not exclude.
    Quoting numeric ranges by end points includes all numbers and fractions included within that range, as well as the specified end points.
    BE2019 / 5414
    By the term w / w% as used herein is meant weight percentage wherein the ratio weight of an ingredient to the total weight of a bottle without closure is expressed as a percentage.
    In the prior art, undercuts are avoided because it is known that an undercut injection molded piece made of a hard material such as polyethylene terephthalate, abbreviated PET, cannot be molded out of the injection mold. Undercuts are therefore always avoided in the design phase of injection molded parts and injection molds.
    The term preform or preform as used herein refers to an object similar to a tube sealed at the bottom. A preform comprises a bottom, a tubular wall that extends upwardly from the bottom in an elongated manner thereby forming a casing part and a neck part following the casing part, the neck part opposite the bottom forming a pouring opening.
    Packaging container preforms are often provided with external or external fasteners. An example known from the prior art is a thread for receiving a screw cap. The neck part can also be provided externally with a neck ring. A preform as used herein is a hollow article obtained by injection molding from a thermoplastic composition.
    Injection molding is a molding technique for thermoplastics, thermosets and metals with a low melting point. The present invention relates to the injection molding of plastics or plastics, in particular to thermoplastics. With injection molding, plastic that is supplied as granulate or powder is melted into a viscous mass and is injected under high pressure into a mold whose cavity (or cavity) is the shape of the desired product. The plastic solidifies and the desired product is obtained by cooling.
    The thermoplastic plastic used in this invention is preferably a polyester. The polyester plastic material used in the invention is preferably selected from polyethylene terephthalate (PET), polyethylene furanoate (PEF), polyethylene naphthalate (PEN), polybutylene terephthalate (PBT) or combinations thereof; most preferably PET.
    BE2019 / 5414
    The PET content in the polyester composition is preferably at least 75 w / w%, more preferably at least 85 w / w%, most preferably at least 95% w / w. Preferably, the PET content in the bottle composition is at least 75 w / w%, more preferably at least 85 w / w%, most preferably at least 95% w / w PET.
    The polyester, preferably PET, may comprise recycled polyester material. A bottle according to an embodiment of the invention preferably contains at least 30 w / w% recycled polyester or recycled PET (rPET); more preferably at least 50 w / w% recycled polyester or recycled PET (rPET); most preferably at least 80 w / w%.
    An injection mold is made up of several assembled and separate parts, mainly made of tool steel. An injection mold can be constructed with one or more mold cavities with mold cores. The mold core defines the inner part of the preform.
    It is well known that when designing an injection mold, undercuts should be avoided. An undercut is a material concept. If the mold to be produced cannot be removed from the tool in a mold or mold because it is trapped, this is an undercut. This is also called form confinement. Movable sliders can be used to have more freedom of form. A slider makes it possible to remove molds with an undercut from a mold. Often, for cost reasons, the product is designed in such a way that as few as possible or no undercuts occur.
    By the term flange as used herein is meant a protruding edge at the end of a tubular shape that serves to attach it to another tube.
    To their surprise, the inventors found that a shallow groove on a mold core of an injection molding device formed an undercut that was not an obstacle in the production of preforms. The inventors came up with the idea of making this groove on a widening of the mold core and testing it for the insertion of inserts. Coordinating the combination with desired inserts ultimately yielded interesting results. The slight increase in the
    BE2019 / 5414 preform resulting from the shallow groove in the mold core ensures receipt of the insert. The insert is no longer loose in the neck part. The insert will not fall out of the container neck when in use. The narrowing in the neck part of the preform, which is the result of the widening on the mold core, provides a so-called stop function. The insert can no longer sink deeper into the neck part, nor by force. The distance between the slight increase and the narrowing was adjusted to the insert to be included.
    The invention will be described in detail below.
    In a first aspect, the invention provides a mold core for injection molding preforms and an injection molding apparatus equipped with said mold core.
    The mold core for injection molding preforms comprises a body whose outer wall will define the inner wall of the preform. A forming core for use in the present invention comprises a raised portion with a shallow groove provided in the raised portion. The raised portion with groove is provided in the portion of the mold core, facing away from the tip of the mold core. The tip is the part that will define the bottom of the preform. The shallow groove has a size of 0.01 - 1 mm. Preferably, the size of the shallow groove is 0.01 - 0.5 mm, more preferably 0.012 - 0.4 mm, even more preferably 0.014 - 0.3 mm, most preferably 0.015 - 0.2 mm.
    The raised portion with groove is in the area for defining the neck portion of the preform. This location is advantageous because, after injection molding, the neck part remains unchanged when the preform is used to stretch containers.
    Arranging a shape core as described above has the advantage that they are reusable and scalable. The mold core is simple in structure.
    The invention also provides an injection molding apparatus with the aforementioned mold core. More specifically, the invention provides an injection molding apparatus for the production of a preform according to an embodiment of the invention, the preform comprising a bottom, a tubular wall extending upward from the bottom in an elongated fashion thereby forming a casing part and a neck part following the mantle part, the neck part facing the
    BE2019 / 5414 bottom forms a pouring opening, and the neck part is provided with an internal fixing means for receiving an insert, the internal fixing means comprising a combination of a slight protrusion with height (h) 0.01-1 mm on the internal wall of the neck part followed by a stepwise narrowing of a neck part towards the casing part, the combination being adapted for shape-fitting accommodation of an insert comprising a peripheral snap flange adapted to fit snugly into the internal fastening means of the thermoplastic plastic container, wherein the injection molding device has an injection mold and mold core, and the injection molding apparatus is adapted to insert the mold core into the injection mold for defining a mold for a preform, characterized in that said mold core comprises a combination of a neck portion of the preform in the region for defining the neck portion of the preform. a raised part and a shallow groove with depth (d) 0.01 - 1 mm provided in the raised portion for defining said internal fastener and said internal fastener is rotationally symmetrical with respect to the longitudinal axis of the mold core.
    A mold core and corresponding injection molding apparatus with said mold core allows the production of preforms with an internal fastener using an undercut. The undercut allows the mold core to be removed without having to use sliders or other complex structures. The device allows the internal fastener to be made simultaneously with the production of the preform. This is in contrast to processes where the fasteners are subsequently applied in a preform.
    The raised part of the mold core preferably comprises rounded corners. This ensures improved removability of the mold core from the injection mold.
    The walls of the shallow groove are preferably not perpendicular to the longitudinal axis of the mold core. Preferably, there are one or more walls that form an angle of less than 90 degrees with the longitudinal axis of the mold core.
    The shallow groove is preferably adapted to give the corresponding part of the fastening means an inclined surface.
    BE2019 / 5414
    The angle between the longitudinal axis of the mold core and the groove wall proximal to the injection molding device, in other words the furthest away from the pin, is preferably less than 15 °.
    This design has the advantage that a contact surface is made for the insert. As the insert runs over the sloping surface, more tension is built up. The maximum stress is built up by the wall parallel to the longitudinal axis of the mold core / preform.
    In a second aspect, the invention provides a method for injection molding a preform using the mold core described above. Characteristic of a preform of the invention is the presence of a fastener on the inside of the neck part. This internal fastener present on the inside is referred to as an internal fastener. " The method for making this preform includes the following steps:
    - inserting a mold core into an injection mold thereby forming a mold for defining the preform, characterized in that the mold core in the zone for defining said neck part comprises a combination of a raised part and a shallow groove with a depth ( d) provided with a raised portion of 0.01-1 mm and made rotationally symmetrical with respect to the longitudinal axis of the mold core, for defining the internal fastener,
    - injection into the mold of a thermoplastic plastic composition with extensible material thereby forming the preform provided with the internal fastener,
    - removing the mold core and the injection mold with release of said preform with internal fastener.
    An injection molding process as described above is a fairly classic process, but with the use of a special mold core. The process has the advantage that an undercut is formed which still allows the injection molding to be removed. The internal fasteners are easy to obtain, without the use of complex constructions and without the need for post-processing. An existing injection molding process can easily be adapted to produce preforms with an internal fastener.
    BE2019 / 5414
    Injection molding is known as a technique with which excellent tolerances on production parts are achieved. This is advantageous for the neck part and especially for an internal fastener. The excellent tolerances contribute to a good fit when an attachment is received by the fastener.
    The preform is arranged for stretch blowing into a container. This means that the structure of the preform is tuned to a stretch blow process and the desired result. The thermoplastic composition for this purpose comprises a thermoplastic plastic that can be heated in an injection molding and blow-molding process. The thermoplastic composition is blown in the heated state in a three-dimensional direction. Furthermore, a stretching operation can be performed on it.
    The production process of the preform is aimed at subsequently producing containers, preferably packaging containers, more preferably bottles.
    The injection molding process as described above is preferably followed by a stretch blow process with the following steps:
    - clamping the neck part of a preform according to an embodiment of the invention in a blow mold, thereby supplying the neck part with an internal fastening means for said thermoplastic plastic container,
    - stretch blowing of the casing and bottom part of the preform against the wall of the blow mold thereby defining the casing part and the bottom part of the thermoplastic plastic container,
    - releasing said stretch-blown thermoplastic plastic container with the internal fastening means for receiving an insert.
    The use of a preform with an internal fastener in the neck part has the advantage that they remain unchanged in the subsequent stretch blowing process. The neck part is not subject to stretch blowing. The neck portion of the preform provides the neck portion for the thermoplastic plastic container. The excellent tolerances obtained from the previous injection molding method are retained. This is advantageous for receiving an insert.
    BE2019 / 5414
    In a preferred form, injection molding and blowing are performed on two separate machines, as a 2-stage operation. It is also possible to do this on one and the same machine (1-stage).
    In a further aspect, the invention provides a preform adapted to be stretch-blown into a container, wherein the neck portion of the preform is provided with an internal fastener, characterized in that said internal fastener comprises a combination of low protrusion with height 0.01 - 1 mm on the internal wall of the neck part followed by a stepwise narrowing of a neck part towards the casing part, the combination being adapted for shape-fitting accommodation of an insert and the fastening means being rotational symmetrically with respect to the longitudinal axis of the preform .
    By "internal fastener" as used herein is meant fasteners that are located within the preform. In the invention, the internal fastener comprises a combination of a slight protrusion on the inside of the preform and a narrowing of the neck of the preform. Between the slight protrusion and narrowing of the neck there is room for form-fitting recording of a protrusion externally applied to an insert.
    The slight protrusion has a much smaller size than the neck narrowing. The slight protrusion has a size of 0.01 - 1 mm. Preferably, the size of the protrusion is 0.01 - 0.5 mm, more preferably 0.012 - 0.4 mm, even more preferably 0.014 - 0.3 mm, most preferably 0.015 - 0.2 mm. The size is measured from the wall of the preform toward the inside of the preform.
    The slight or slight protrusion means that a minimum of material is needed to offer functionality. Although the protrusion forms an undercut, the preform is still removable from the mold after production. The undercut provides a snap edge. The snap edge ensures that an insert is not loose in the vertical direction, parallel to the longitudinal axis of the preform. The slight protrusion allows a removable inclusion of a complementary insert.
    The slight protrusion and the height of the neck narrowing are at least 1: 3, preferably 1: 5, more preferably 1: 8, most preferably 1:10. Bee
    BE2019 / 5414, both elements are thinner than the wall thickness of the neck portion at the pouring opening. The neck narrowing extending from the preform wall is preferably at least 3 times smaller than the preform wall, preferably at least 4 times, most preferably at least 5 times. These proportions and dimensions have the advantage that increased functionality is achieved with little material.
    The wall of the low protrusion proximal to the pouring opening forms an angle of less than 15 °, preferably less than 12 °, most preferably around 10 ° with the longitudinal axis of the preform. This embodiment provides a contact surface for the click flange. The insert is gradually being pushed together. Once over the slight protrusion, the flange gets stuck between the protrusion and the narrowing of the neck.
    The narrowing of the neck of the preform provides functionality as a stopper.
    This stop means ensures that the insert cannot be pushed through the neck part.
    The protrusion and neck narrowing parts are combined to form an internal fastener. To this end, the distance between the two elements and the design of the elements is adjusted to enable it to receive an insert fitting form.
    Both the protrusion and the stepwise narrowing are located in the neck part, and therefore not in the mantle part. This ensures that a fastening means is already present before the casing and bottom part of the container are formed. The fastener will not be distorted during the stretch blowing process. The version as an injection-molded part ensures excellent tolerances. This benefits the shape pass.
    The combination preferably connects to the casing part. With this positioning, the combination sits just above the casing part. This is advantageous for a maximum intake of the insert deep in the neck of the container.
    A preform according to an embodiment of the invention is preferably obtained with a method according to the invention.
    BE2019 / 5414
    In a further aspect the invention provides a container obtained from a preform according to the invention. More specifically, the invention provides a thermoplastic plastic container obtained by injection molding, wherein the container comprises a bottom part, a casing part extending upwardly from the bottom part and a neck part following the casing part, the neck part opposite the bottom part forming a pouring opening, with the characterized in that the neck part is provided with an internal fastening means for receiving an insert, comprising a combination of a slight protrusion with a height of 0.01 1 mm on the internal wall of the neck part followed by a stepwise narrowing of a neck part towards the casing part, wherein the combination is adapted for shape-fitting accommodation of an insert and the fixing means is of rotationally symmetrical design with respect to the longitudinal axis of the plastic container.
    A container according to an embodiment of the invention is characterized by an internal fastener comprising a small protrusion and a neck narrowing. The location in the neck zone ensures that the internal fastener remains unchanged in the stretch blow step, in which the sheath and bottom are formed. The neck part, formed by injection molding, has excellent tolerances. This is advantageous for being able to receive an insert close-fitting.
    The neck part is preferably obtained with an injection molding method according to an embodiment of the invention, and the casing part and bottom part are preferably obtained with a stretch blow method according to an embodiment of the invention. The use of stretch blow as a production method, at the same time, gives thinner walls and strength.
    The container can be made from a biaxially stretchable thermoplastic plastic such as polyethylene, polypropylene, PET, polyvinyl chloride (PVC) or polystyrene. The container is preferably made from PET.
    In a further aspect the invention provides a combination of a thermoplastic plastic container according to an embodiment of the invention and an insert, characterized in that the insert is adapted for shape-fitting accommodation in an internal fastening means provided in the neck part
    BE2019 / 5414 of the container obtained with injection-stretch blowers. The internal fastener comprises a combination of slight protrusion with a height of 0.01 - 1 mm. The protrusion is on the internal wall of the neck part. Towards the casing part of the container, the protrusion follows a stepwise narrowing of the neck part. The combination is adapted for shape-fitting insertion of the insert. The fastener is of rotationally symmetrical design with respect to the longitudinal axis of the plastic container.
    The insert preferably comprises a peripheral click flange, the click flange being adapted for shape-fitting incorporation into the internal fastener of the container.
    The proposed combination provides a set of complementary components. There is minimal use of material. The insert is removable and reusable.
    The internal fastener and the insert are preferably provided with tolerances for providing a fluid-tight fit when the insert is received in the internal fastener.
    By the term fitting as used herein is meant the extent to which mutually fitting parts connect. A fit determines which tolerances are permitted for parts that fit together. In the present invention, it is advantageous that a liquid-tight fit is used. This means that the parts that fit into each other have no gaps, as a result of which a large amount of liquid could leak when poured out through the dosing cap.
    The insert preferably comprises a spout. An insert with pouring spout forms an attachment that is advantageous for pouring out liquids, gels, powders. Less is spilled than with a container with a pouring opening. The pouring spout can be used to deliver any product that exhibits flow, including household and personal care products, food or feed. Flowable products (flowable products) include liquids, gels, but also powders. In a preferred form the insert can be turned freely to choose the casting direction. In another preferred form, the rotational movement is limited.
    BE2019 / 5414
    The container and insert are preferably combined with a dosing cap. The dosing cap is preferably designed to receive the attachment with pouring spout at least partially.
    The dosing cap is preferably equipped for receiving a thread on the neck portion of a container. This is advantageous for closing the container.
    The combination of a dosing cap and insert with spout ensures that a quantity of liquid or gel or powder can be measured. This provides a more suitable dosage. The insert is compatible with existing screw caps. Fitting the insert is very simple, just clicking into the container is enough. The insert is easy to make. No complex mold design is required to make a thread, either outside or inside.
    The combination can advantageously be used for dosing and administering detergent, fabric softener, plant food, pesticide.
    The combination insert / dosing cap can be provided on the neck opening of a container in assembled condition.
    The insert can also be supplied separately. A container neck is hereby sealed with the dosing cap. The insert can be fitted after the container has been opened. The insert can, for example, be accommodated in a storage compartment provided in a container wall.
    In a further aspect the invention provides an insert for a thermoplastic plastic container according to an embodiment of the invention, comprising a peripheral click flange for receiving in the neck portion of the thermoplastic plastic container, characterized in that the click flange is adapted for shape-fitting receiving in a internal fastener arranged in the internal neck portion of the thermoplastic plastic container, the internal fastener comprising a combination of a slight protrusion with a height of 0.01-1 mm on the internal wall of the neck portion of the container followed by a stepwise narrowing of a neck portion towards the jacket part of the container.
    BE2019 / 5414
    The insert preferably comprises a peripheral click flange which becomes a surrounding wall, a U-shaped floor and a pouring spout ascending from the inner part of the floor, characterized in that the surrounding wall and U-shaped floor are arranged as a spring element for the peripheral click flange.
    The peripheral snap flange of the insert is preferably provided with tolerances for providing a fluid-tight fit when the insert is received in the internal fastener. This version is advantageous to prevent product loss. The user comfort is increased because the container does not necessarily have to be stored or used upright.
    The insert is preferably an injection molding. The use of the injection molding technique provides a molded part with excellent tolerances. This benefits a good form pass with the insert. The insert can be made from a thermoplastic plastic such as polyethylene, polypropylene, PET, polyvinyl chloride (PVC) or polystyrene.
    In another preferred form, the insert comprises a peripheral click flange arranged on an end of a flexible tube.
    The insert may also be a dosing cap equipped with a peripheral snap flange for receiving into the neck of a container with internal fastener according to an embodiment of the invention;
    The invention is further illustrated with reference to examples. The examples are not limitative.
    Figure 1 shows a part of an injection molding device 20, namely the mold core
    1. In the zone for defining the neck portion 7 of the preform 10, the mold core 1 has a raised portion 2 with a shallow groove 12 (see detail view in Fig. 2) in the raised portion 2. These components provide for the definition of the internal fastener 15 (see detailed view of Fig 2). The shallow groove 12 provides a correspondingly slight bulge on the wall of the preform 10. The raised part 2 on the mold core 1 provides a stepwise narrowing 11 at the preform 10. The tip 8 of the mold core 1 provides a definition of the bottom part 6 in the preform 10.
    BE2019 / 5414
    Figure 2 shows a part of an injection-molding device 20, namely a mold core 1 accommodated in an injection molding mold 14. Figure 2 shows a detailed representation of the circled area A. The mold core 1 accommodated in the injection mold mold 14 ensures the formation of a mold 22 for the formation of a preform. In the neck portion, the mold core 1 is provided with a raised portion 2 with a shallow groove 12. In the mold, these parts provide a protuberance 18 and stepwise constriction 11. In a preform, they will provide a combination of a protrusion 18 and stepwise constriction 11 .
    Figure 3 shows results of preform production with a mold core 1 according to an embodiment of the invention. The preform or preform 10 comprises a neck part 7, a jacket part 5 and a bottom part 6. At the end opposite the bottom part 6, the neck part has a pouring opening 21. On the outer wall, the neck part 7 is provided with a screw thread 3 and a neck ring 4. On the inner wall the neck part 7 is provided with internal fastening means 2.
    Figure 4 shows a schematic representation of a preform 10 mounted on a mold core 1. Figure 5 shows a detailed representation of the circled area B. Where the mold core 1 has a widening 2 with height H, the neck opening is wider there. The transition from widening to a narrower part of the mold core 1 causes a stepped narrowing 11 in the neck portion 7 of the preform 10. The shallow groove 12 in the mold core 1 provides a corresponding slight increase 18 in the preform 10. The combination of the slight elevation 18 and the stepwise narrowing 11 provide the fastening means 15 for receiving an insert (not shown).
    Figure 6 shows a schematic representation of the internal fastener according to an embodiment of the invention. This fastening means comprises a combination of a slight elevation 18 with height h and a stepped narrowing 11. The fastening means is arranged in the wall of a neck part. The neck part can be in a preform or container obtained from the preform, obtained by injection molding at least the neck part. The slight elevation is equipped with a contact surface for receiving a click flange. To this end, the wall closest to the pouring opening is inclined. The wall forms an angle Θ of 10 ° with the longitudinal axis (1) of the neck part. Once the click flange has been pushed over the contact surface, the click flange is received in the opening between the fastening means. The narrowing of the neck provides a stop function. The
    BE2019 / 5414 click flange cannot sink deeper into the neck. The wall of the slight elevation in the direction of the narrowing is preferably also chamfered. Typically there is an angle α of 45 ° between the sloping wall of the faint elevation and an axis perpendicular to the longitudinal axis (1) of the neck portion. The forming core for defining the internal fastener was equipped with a corresponding shallow groove with depth d.
    权利要求:
    Claims (19)
    [1]
    CONCLUSIONS
    A method for injection molding a preform (10) adapted to be stretch blown into a container (9), the preform (10) comprising a bottom (6), a tubular wall extending upward from the bottom on a elongatingly forming a casing part (5) and a neck part (7) following the casing part (5), the neck part (7) forming a pouring opening (21) opposite the bottom (6), and providing the neck part (7) is of an internal fastener (15) for receiving an insert, the method comprising the following steps:
    - inserting a mold core (1) into an injection mold (14) thereby forming a mold (22) for defining the preform (10), characterized in that the mold core (1) in the zone for defining said neck part (7) comprises a combination of a raised part (2) and a shallow groove (12) with a depth (d) of 0.01 - 1 mm provided in the raised part (2) and of rotationally symmetrical design with respect to the longitudinal axis ( l) of the mold core (1), for defining the internal fastener (15),
    - injection into the mold (22) of a thermoplastic plastic composition with extensible material forming the preform (10) provided with the internal fastening means (15),
    - removing the mold core (1) and the injection mold (14) with release of said preform (10) with the internal fastening means (15).
    [2]
    A preform adapted to be stretched into a container, the preform comprising a bottom, a tubular wall extending upward from the bottom in an elongated fashion thereby forming a casing part (5) and a neck part (7) following the casing part (5), wherein the neck part (7) opposite to the bottom forms a pouring opening (21), and the neck part (7) is provided with an internal fastening means (15) for receiving an insert, in which the preform (10) stretchable thermoplastic composition, characterized in that said internal fastener (15) comprises a combination of slight protrusion with height (h) 0.01-1 mm on the internal wall of the neck portion (7) followed by a stepwise narrowing of the neck part (7) towards the casing part (5), the combination being adapted for shape-fitting
    BE2019 / 5414 receiving an insert and the fastening means (15) is rotationally symmetrical in relation to the longitudinal axis (1) of the preform.
    [3]
    A preform (10) according to claim 2, characterized in that the combination connects to the casing part (5).
    [4]
    A preform (10) according to claim 2 or 3, characterized in that the wall of the low protrusion located proximally to the pouring opening (21) forms an angle Θ of less than met with the longitudinal axis of the preform (10) 15 °.
    [5]
    A preform (10) according to any one of the preceding claims 2 to 4, obtained with a method according to claim 1.
    [6]
    Method for stretch blowing a thermoplastic plastic container (9) comprising a neck part (7) provided with an internal fastening means (15), for receiving an insert, the method comprising the following steps:
    - providing a preform (10) with internal fastening means (15) according to one of claims 2 to 5, characterized in that said internal fastening means (15) comprises a combination of low protrusion with height (h) 0.01 - 1 mm on the internal wall of the neck part (7) followed by a stepwise narrowing of the neck part (7) towards the casing part (5), the combination being adapted for shape-fitting accommodation of an insert,
    - clamping the neck part (7) of the preform (10) in a blow mold, thereby supplying the neck part (7) with the internal fastening means (15) for said thermoplastic plastic container (9),
    - stretch blowing of the casing and bottom part (6) of the preform (10) against the wall of the blow mold thereby defining the casing part (5) and the bottom part (6) of the thermoplastic plastic container (9),
    - releasing said stretch-blown thermoplastic plastic container (9).
    [7]
    A thermoplastic plastic container (9) obtained by injection-molding, comprising a bottom part (6), a casing part (5) extending upward from the bottom part (6) and a neck part (7) following the casing part (5),
    BE2019 / 5414, wherein the neck part (7) located opposite the bottom part (6) forms a pouring opening (21), characterized in that the neck part (7) is provided with an internal fastening means (15) for receiving an insert comprising a combination of a slight protrusion with height (h) 0.01-1 mm on the internal wall of the neck part (7) followed by a stepwise narrowing of a neck part (7) towards the casing part (5), the combination being adapted for shape-fitting receiving an insert and the fastening means is rotationally symmetrical with respect to the longitudinal axis of the plastic container (9).
    [8]
    Thermoplastic plastic container (9) according to claim 7, characterized in that the neck part (7) is obtained with an injection molding method according to claim 1 and the casing part (5) and bottom part (6) are obtained with a stretch blow method according to claim 6.
    [9]
    Combination of a thermoplastic plastic container (9) according to claim 7 or 8 and an insert, characterized in that the insert is adapted for shape-fitting accommodation in an internal fastening means (15) provided in the neck part of the container obtained with injection-stretch blowers and comprising a combination of slight protrusion with height (h) 0.01-1 mm on the internal wall of the neck part (7) followed by a stepwise narrowing of a neck part (7) towards the casing part (5), the combination arranged for shape-fitting accommodation of the insert and the fastening means is designed to be rotationally symmetrical with respect to the longitudinal axis of the plastic container (9); the insert preferably comprises a peripheral snap flange for incorporation into the internal fastener (15).
    [10]
    Combination according to claim 9, characterized in that the internal fastening means (15) and the insert are provided with tolerances for providing a fluid-tight fit when the insert is received in the internal fastening means (15).
    [11]
    A combination according to claim 9 or 10, wherein the insert is a spout.
    [12]
    12. Combination as claimed in any of the foregoing claims 9 to 11, further in combination with a dosing cap adapted for at least a partial
    BE2019 / 5414 receiving the pouring spout and preferably provided with an internal screw thread (3) for attachment to a thermoplastic plastic container (9) according to claim 7 or 8, wherein the thermoplastic plastic container (9) is provided externally on the neck part (7) is of an external fastener (15), preferably the external fastener consists of annular indentations for receiving the screw thread (3).
    [13]
    An injection molding apparatus (20) for the production of a preform (10), preferably a preform (10) according to any of claims 2 to 5, the preform (10) comprising a bottom, a tubular wall extending upwardly from the bottom forming an sheath part (5) and an neck part (7) following the casing part (5) in an elongated manner, the neck part (7) forming a pouring opening (21) opposite the bottom, and the neck part (7) being provided of an internal fastener (15) for receiving an insert, the internal fastener (15) comprising a combination of slight protrusion with height (h) 0.01-1 mm on the internal wall of the neck portion (7) followed by a stepwise narrowing of a neck part (7) towards the casing part (5), the combination being adapted for shape-fitting accommodation of an insert comprising a peripheral snap flange adapted to fit snugly into the internal fastening means (15) of the thermoplastic plastic co container (9), and wherein the injection molding apparatus (20) comprises an injection mold (14) and mold core (1), the injection molding apparatus (20) is adapted to insert the mold core (1) into the injection mold (14) for defining a mold (22) for a preform (10), characterized in that said mold core (1) in the zone for defining the neck portion (7) of the preform (10) comprises a combination of a raised portion with a shallow end groove (12) with depth (d) 0.01 - 1 mm provided in the raised part (2) for defining the internal fastener (15) and said internal fastener (15) is rotationally symmetrical with respect to the longitudinal axis (l) of the mold core.
    [14]
    Injection molding device (20) according to claim 13, characterized in that the raised part (2) has rounded corners.
    [15]
    Injection molding device (20) according to claim 13 or 14, characterized in that a groove wall (28) forms an angle (Θ, a) of less than 90 degrees measured
    BE2019 / 5414 between the longitudinal axis of the mold core (1) and the corresponding shallow groove (12).
    [16]
    Injection molding device (20) according to claim 15, characterized in that the angle Θ between the longitudinal axis of the mold core (1) and the shallow groove wall (29) located proximally to the injection molding device (20) is smaller than 15 °.
    [17]
    An insert for a thermoplastic plastic container (9) according to claims 7-8, comprising a peripheral click flange (23) for receiving in the neck portion of the thermoplastic plastic container (9), characterized in that the click flange is adapted for shape-fitting receiving in the internal fasteners (15) arranged in the inner neck portion of the thermoplastic plastic container (9), the internal fasteners (15) comprising a combination of a slight protrusion with height (h) 0.01-1 mm on the internal wall of the neck part (7) of the container (9) followed by a stepwise narrowing of a neck part (7) towards the casing part (5) of the container (9).
    [18]
    An insert according to claim 17, wherein the peripheral click flange (23) merges into a surrounding wall (24), a U-shaped floor (25) and a spout (26) rising from the inner part of the floor, characterized in that in that the surrounding wall (24) and U-shaped floor (25) are arranged as a spring element (27) for the peripheral click flange.
    [19]
    An insert according to claim 17 or 18, characterized in that the peripheral snap flange (23) is formed with tolerances for providing a fluid-tight fit when the insert is received in the internal fastening means (15).
    类似技术:
    公开号 | 公开日 | 专利标题
    US5533881A|1996-07-09|Apparatus for forming a strain-hardenable thermoplastic container
    CA2779439A1|2011-05-12|Preform and container comprising reinforcing elements
    JPWO2013089054A1|2015-04-27|Parison and container blow molding method using the same
    MX2012015071A|2013-02-07|High velocity injection molded product.
    EP1114780B1|2005-03-30|One-piece dosing cap
    CA2451545C|2009-11-10|Preform for small flat container and small flat container
    BE1026310B1|2019-12-18|FORM AND CONTAINER FURNISHED FOR RECORDING AN INSERT, WITH METHODS AND APPARATUS FOR THEIR PRODUCTION
    JP2551457B2|1996-11-06|Plastic container with the feature of self-drainage
    US9539754B2|2017-01-10|Method of manufacturing an injected and blown product
    US4280630A|1981-07-28|Container with handle
    US20050037106A1|2005-02-17|Method and apparatus for forming thin-walled products, and a product manufactured therewith
    EP2735427B1|2015-09-16|Method of manufacturing an injected and blown product
    WO2003029095A1|2003-04-10|Resin tube-like container and preform thereof
    WO2019146701A1|2019-08-01|Manufacturing method of a plastic container component, mold unit, and blow molding machine provided with mold unit
    CN107148333A|2017-09-08|Prefabricated component for liquid blow molding
    JP2018501130A|2018-01-18|Container having a wide-mouthed neck fitted with a threaded sleeve
    JP3590667B2|2004-11-17|Manufacturing method of aseptic container
    KR20210069089A|2021-06-10|Vessel
    WO2012103988A1|2012-08-09|Package
    JPH08198256A|1996-08-06|Synthetic resin container in double structure, and its manufacture
    JP3865291B2|2007-01-10|Liquid hollow container that can dispense the remaining solution inside
    JP2018134813A|2018-08-30|Preform assembly for molding double structure container
    JP3870599B2|2007-01-17|Plastic bottle
    JPH10315308A|1998-12-02|Liquid receiving vessel and manufacture thereof
    PL231711B1|2019-03-29|Method for producing thin-walled packing by injection molding method and the thin-walled packing
    同族专利:
    公开号 | 公开日
    EP3814082A1|2021-05-05|
    WO2020003185A1|2020-01-02|
    US20210260810A1|2021-08-26|
    EP3587061A1|2020-01-01|
    引用文献:
    公开号 | 申请日 | 公开日 | 申请人 | 专利标题
    US3308998A|1965-04-21|1967-03-14|Alberto Culver Co|Dispensing device including cap attachable for either sealing or dispensing|
    AT363248B|1975-10-10|1981-07-27|Anger Anton Maschbau|INJECTION MOLD FOR MAKING FITTINGS|
    US4929410A|1984-12-06|1990-05-29|The Procter & Gamble Company|Method for blow-molding a container having a neck-portion with internal attachment means|
    US5207356A|1988-02-25|1993-05-04|Owens-Illinois Plastic Products Inc.|Self-draining container|
    CH676572A5|1988-12-07|1991-02-15|Claropac Ag|
    AU5851794A|1992-12-18|1994-07-19|Chris J Grant|Container with integrally molded closure/tamper indicator|
    US5855299A|1997-04-04|1999-01-05|Graham Packaging Corporation|Plastic container dispensing fitment|
    US6123231A|1998-07-13|2000-09-26|Owens-Brockway Plastic Products Inc.|Plastic container with drain back spout and method and apparatus for making same|
    US20050139569A1|2003-12-24|2005-06-30|Larsen W. B.|Swage-forming of container or preform internal threads|
    US6968980B2|2003-12-30|2005-11-29|Unilever Home & Personal Care Usa, A Division Of Conopco, Inc.|Pour spout fitment and container|
    FR2868983B1|2004-04-14|2006-06-23|Eurofeu Sa Sa|METHOD FOR MANUFACTURING A HOLLOW BODY BY EXTRUSION OF A THERMOPLASTIC RESIN AND DEVICE FOR IMPLEMENTING IT|
    KR100830576B1|2006-09-29|2008-05-22|삼성전자주식회사|Semiconductor device and method for forming thereof|
    KR20120091437A|2009-12-07|2012-08-17|어드밴스드 테크놀러지 머티리얼즈, 인코포레이티드|Configurable port fitment, kit, and related methods|
    法律状态:
    2020-01-29| FG| Patent granted|Effective date: 20191218 |
    优先权:
    申请号 | 申请日 | 专利标题
    EP18382476.2A|EP3587061A1|2018-06-27|2018-06-27|Preform and container adapted for accommodating an insert piece, with methods and apparatus for their production|
    [返回顶部]