• 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:
    A mold for the production of an optical element having - a first mold half (2), - a second mold half (3) separated from the first mold half (2) by a parting line, - a first injection station (4) arranged at the parting plane for forming a first mold Layer of the optical element to be produced, - a second injection station (5) arranged at the parting plane, in which a second layer of the optical element to be produced can be injection-molded onto the first layer, and - a transport device for transporting the first layer out of the first injection station (4) into the second injection station (5), wherein a third injection station (6) arranged at the parting plane, in which a third layer of the optical element to be produced can be injected onto the first layer and / or the second layer, wherein the first layer is sprayable together with the first injection station sprayed second layer by means of the transport device from the second injection station (5) to the third injection Ation (6) is transportable.
    公开号:AT516284A1
    申请号:T50712/2014
    申请日:2014-10-06
    公开日:2016-04-15
    发明作者:Josef Dipl Ing Giessauf；Christian Msc Maier
    申请人:Engel Austria Gmbh；
    IPC主号:
    专利说明:

    The present invention relates to a molding tool for the manufacture of an optical element, in particular a lens, comprising the features of the preamble of claim 1 and a method of manufacturing an optical element according to the features of the preamble of claim 16.
    It is known from the Applicant's AT 505321 A1 that, for example, lenses can advantageously be injection-molded in three layers. Dividing into two layers is not advantageous because making two lenses in each unique cavity is more effective. A production of a two-layer lens is disclosed, for example, in EP 1785255 A1.
    From EP 0839636 A2 a manufacturing of a lens is shown in three steps, wherein a core of the lens is made, the core is then inserted into a mold and then first a finished lens surface is molded on one side and then on the other side. Although this has the advantage of a three-layer Aufbau.Nachteilig is that must be taken for the transport of the pre-molded into the mold a considerable effort, so even in this embodiment only a slightly improved efficiency compared to a two-layer structure of the lens can be achieved.
    The object of the invention is to provide a mold and a method which make it possible to manufacture a three-layered or multilayered lens in a simpler manner compared to the prior art.
    With regard to the mold, this object is achieved with the features of claim 1. With regard to the method, this is done with the features of claim 16.
    A key aspect of the invention is to manufacture the three-layer lens in three separate spray stations located in a (single) parting plane of the mold.
    The parting plane is to be understood as that surface on which halves of the mold meet. This surface need not be flat, but may also be curved or contain steps. The criterion is merely that the cavities of the spray stations are formed by the meeting of the mold halves at the parting line. Of course, a mold according to the invention need not consist of only the two mold halves. Of course, molds according to the invention may also include other parts such as slides, ejectors and many other movable and immovable parts. In particular, the transport device may also be part of the mold.
    The arrangement of the at least three spray stations in a parting plane results in a considerable simplification of the technical effort that must be made to convey the respective sprayed layers into the next cavities. In addition, in this way the residual heat present in the tool can have a positive effect on the layer adhesion.
    The invention makes it possible to produce three or more layered optical elements with a single injection unit. Of course, the optical elements can also be manufactured with any number of injection units.
    Another advantage of disposing the spray stations in a plane is that clean and clean room conditions can be more easily made.
    The transport device may comprise a plurality of separate sub-transport devices, such as turntables or handling robots.
    Advantageous embodiments of the invention are defined in the dependent claims.
    It can be provided that the third injection station is designed such that the third layer in the third injection station can be sprayed on a side of the first layer facing away from the second layer. Compared to an embodiment in which, for example, outer layers of a lens are sprayed simultaneously, such an embodiment has the great advantage that melt flows do not have to be balanced. Because if a melt stream arrives too early or exerts excessive pressure, the preform can break or otherwise take damage. Applicant's research has shown that the effort required to avoid this is significant.
    In particular, this embodiment makes it possible to produce the first layer with relatively little precision, since any deviations or sink marks are covered by the second and third layers and thus do not produce adverse effects.
    It can be provided that the first injection station is designed to produce the first layer in at least two sublayers. It may be important that the last first layer completing sub-layer be made in the first spray station. Of course, it is also possible to arrange more than three spray stations in a parting plane and to manufacture the optical element in more than three layers or sub-layers.
    The transport device may comprise a handling robot by means of which the first layer can be transported from the first injection station to the second injection station. This makes it possible to feed the first layer into a cooling station before it is transported to the second injection station. This is also possible in an embodiment in which the transport device comprises a turntable, by means of which the first layer can be transported from the first injection station to the second injection station. An advantage of using a handling robot here may be that the length of the cooling - or the number of cycles over which it is cooled - is adjustable, while for a turntable the complete cycle time has to be changed in order to adjust the cooling time. At a cooling station located outside the mold, this disadvantage can be avoided.
    With regard to the transport to the third injection station, it may be provided that the transport device is designed to move a part forming the second layer of the second injection station to transport the first layer together with the sprayed second layer to the third injection station. As a result, it can be achieved that surfaces of the finished optical element are only demoulded once and do not have to be put back into a mold cavity after removal from the mold. This can namely lead to damage to the surface, which would of course be disadvantageous especially for optical elements.
    In particular, when it is intended to use a part forming the second layer for transport to the third injection station, it can be particularly advantageous if the transport device comprises a turntable by means of which the first layer together with the sprayed second layer from the second injection station into the third spray station is transportable. This is a particularly simple embodiment. When it is intended to use a second layer mold forming member for transport to the third spray station by which the first layer is transportable from the second spray station to the third spray station along with the second sprayed layer, then instead of the turntable a handling robot can be used.
    It may be provided to manufacture two or more lenses simultaneously, i. H. in each case two or more layers of separate optical elements are produced in the spray stations. For example, in the manufacture of lenses for vehicle headlights, this may be advantageous as they are needed in pairs.
    The general rule:
    It can be provided that the spray stations are all formed by a common tool, but also that each spray station can be formed by a separate tool. The turntable may be part of both the machine and the tool.
    Protection is also sought for an injection molding machine with a mold according to the invention.
    Further advantages and details of the invention will become apparent from the figures and the accompanying description of the figures. Showing:
    1 shows a schematic representation of a molding tool for producing an optical element with three spray stations arranged in a parting plane,
    2 shows an embodiment of the invention, wherein the transport device has two turntables,
    Fig. 3 shows an embodiment of the invention, wherein also two turntables are present and one of the turntables forms a cooling station / operated, and
    Fig. 4 shows an embodiment of the invention with a handling robot and a turntable.
    In Fig. 1, a mold 1 with a first mold half 2 and a second mold half 3 is shown schematically. The mold 1 is shown open. At the dividing plane of the mold, a first injection station 4, a second injection station 5 and a third injection station 6 are arranged.
    Three layers of two lenses are produced in the three spray stations. For this specific case, the application is provided in automotive headlamps, the pairwise production of the lenses proves to be advantageous.
    The forming parts of the individual stations are designated as follows: -1R forming part for a first layer of a right lens; -1L shaping part for a first layer of a left lens, - 2R shaping part for a second layer of a right lens; 2L shaping part for a second layer of a left lens; 3R shaping part for a third layer of a right lens; 3L forming part for a third layer of a left lens.
    In the first injection station 4 are opposite to the designated 1R and 1L forming parts. After the mold 1 is closed, the first layer is injected in the resulting cavities. This first layer is then transported by means of the transport device to the correspondingly shaped parts of the second injection station 5, wherein various embodiments for transport devices are shown in FIGS. 2 to 4. The orientation of the forming parts relative to one another is illustrated by the orientation of the designation 1 R, L to 3 R, L. In particular, the orientation of the second injection station 5 is "twisted" by 180 °. Upon closure of the mold 1, the 1R, 1L cavity portions with underlying first layer and the cavity portions labeled 2R and 2L face each other. In the resulting space on the 2R, 2L side, the second layer is then injected. This second layer already defines a surface of the lens to be manufactured. In this embodiment, it is intended that this surface be removed only once from a mold, and thereafter not placed back on a mold, as this may result in damage to the surface of the lens.
    The first together with the second layer is then conveyed from the second injection station 5 to the third injection station 6. For the embodiments of the transport device, reference is again made to FIGS. 2 to 4. After re-closing of the mold, the mold-forming parts are opposite, which are denoted by 2R and 2L and 3R and 3L. Again, an enlarged cavity is created, in which space the third layer is sprayed. After this third injection, the lens is ready and can be removed from the mold after opening the mold 1.
    In Fig. 2 a first example of the design of the transport device is shown. In this case, two turntables 8 are used, with one of the turntables 8 arranged on the first mold half 2 and one of the turntables 8 on the second mold half 3. Theoretically, it is also possible in this embodiment to include a cooling station - by removal and reinsertion into the molded parts designated 1R and 1L of the first injection station 4 or the second injection station 5. However, if cooling is to be performed
    Exemplary embodiments of FIGS. 3 and 4 are preferred. All forming parts can be tempered variothermally, i. H. they can be tempered so that their set temperature undergoes a change during a production cycle. In doing so, a relatively hot temperature is usually first selected to assist the injection of a plasticized plastic or the like, and thereafter cooling to accelerate the solidification of the respective layer.
    The embodiment of Fig. 3 also uses two turntables 8 for transporting the layers. In contrast to the above-described embodiment, the turntable 8 arranged on the second mold half 3 has an additional position, this also finding a counterpart labeled K on the first mold half 2. This additional position is for cooling. The first layer is therefore cooled for one cycle after manufacture in the cooling station K.
    Otherwise, this embodiment is analogous to that of FIG. 2.
    This also applies to the embodiment of FIG. 4, with the difference that for the transport of the first layers to the second injection station 5 not a turntable 8 but a handling robot (not shown) is used. In this embodiment, it may be provided that the first layers are transferred after production to an external cooling station before being reinserted into the parts of the second injection station 5 labeled 1R and 1L. The advantage of this external cooling station is that the cooling time is not determined by the cycle time. In fact, the cooling can also be carried out over two or more strokes, whereby the cooling time is relatively easily adjustable.
    Again, there is the advantage that finished molded surfaces of the lens do not have to be re-inserted into a mold cavity after molding.
    For this reason and because of the tunability of the cooling time, this embodiment may be a preferred one. Another advantage of the invention is that the production of optical elements can also be performed with only a single injection unit.
    The spray stations 4, 5 and 6 in the figures can be designed so that they are all part of a tool. But it is also possible that each spray station is formed by a separate tool (= 3 tools side by side). For the turntables 8 in Figures 2 and 3, the turntables 8 are either an integral part of the machine or part of the tool.
    In Fig. 4 there is again the possibility that the turntable 8 is part of the tool or the machine. In addition, the embodiment could be implemented with only one tool. However, it is also possible to implement the embodiment in such a way that the first injection station is realized with a tool, a second tool forms the injection stations 2 and 3. The second tool would then also include the turntable.
    It should be noted that instead of the term "turntable" in the jargon and the term "turntable" is used. In any case, this refers to a device which carries at least two shaping halves each of a cavity and which is rotatable so that one of the shaping halves can be positioned on at least two different counterparts. The turntable itself can be an integral part of the tool or the machine.
    权利要求:
    Claims (16)
    [1]
    1. mold for the production of an optical element with - a first mold half (2), - one of the first mold half (2) separated by a parting plane second mold half (3), - arranged on the parting plane first injection station (4) for Forming a first layer of the optical element to be produced, a second injection station (5) arranged at the parting plane, in which a second layer of the optical element to be produced can be injection-molded onto the first layer, and a transport device for transporting the first layer out of the first injection station ( 4) into the second injection station (5), characterized by a third injection station (6) arranged at the parting plane, in which a third layer of the optical element to be produced can be injection-molded onto the first layer and / or the second layer, the first layer being sprayable together with the first molded second layer by means of the transport device from the second fuel zstation (5) to the third spray station (6) is transportable.
    [2]
    A mold according to claim 1, characterized in that the third spray station (6) is formed so that the third layer in the third spray station (6) is injectable on a side of the first layer facing away from the second layer.
    [3]
    A mold according to claim 1 or 2, characterized in that the first injection station (4) is adapted to produce the first layer in at least two sublayers.
    [4]
    A mold according to any one of claims 1 to 3, characterized in that the transport device comprises a handling robot by means of which the first layer can be transported from the first injection station (4) to the second injection station (5).
    [5]
    5. Forming tool according to one of claims 1 to 4, characterized in that the transport device comprises a turntable (8), by means of which the first layer of the first injection station (4) to the second injection station (5) is transportable.
    [6]
    6. Forming tool according to one of claims 1 to 5, characterized in that the first layer by means of the transport device - preferably a handling robot or a turntable (8) - from the first injection station (4) to a cooling station and from the cooling station to the second injection station (5 ) is transportable.
    [7]
    7. Forming tool according to claim 6, characterized in that the cooling station is arranged outside the molding tool (1).
    [8]
    A mold according to claim 6, characterized in that the cooling station is formed by a position of the turntable (8).
    [9]
    A mold according to any one of claims 1 to 8, characterized in that the transport device is adapted to move a part of the second injection station (5) forming the second layer to transport the first layer together with the molded second layer to the third injection station (6) ,
    [10]
    10. Forming tool according to one of claims 1 to 9, characterized in that the transport device comprises a turntable (8), by means of which the first layer is transportable together with the molded second layer from the second spray station (5) in the third injection station (6).
    [11]
    11. A mold according to any one of claims 1 to 10, characterized in that the first injection station (4) is formed so that at least two first layers are malleable.
    [12]
    12. A mold according to any one of claims 1 to 11, characterized in that the second injection station (5) is formed so that at least two second layers can be injection-molded on two first layers.
    [13]
    13. Forming tool according to one of claims 1 to 12, characterized in that the third injection station (6) is formed so that at least two third layers of at least two first layers and / or at least two second layers are injectable.
    [14]
    14. A mold according to any one of claims 1 to 13, characterized in that the mold (1) is adapted to produce a lens as an optical element.
    [15]
    15. Injection molding machine with a molding tool according to one of claims 1 to 14.
    [16]
    16. A method for producing an optical element by means of a mold, in particular by means of a mold according to one of claims 1 to 14 and / or an injection molding machine according to claim 15, wherein - in a arranged on a parting plane of the mold first injection station (4), a first layer of the produced the first layer is transported by means of a transport device to a second injection station (5) arranged at the parting plane of the mold and - in the second injection station (5) a second layer of the optical element to be produced is injection molded onto the first layer in that - the first layer, together with the sprayed second layer, is transported by means of the transport device from the second injection station (5) to a third spray station (6) arranged on the dividing plane, and - a third layer of the optical element to be produced Layer and / or the second layer is injected.
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    同族专利:
    公开号 | 公开日
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    DE102015017250B3|2020-06-25|
    KR20160041016A|2016-04-15|
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    AT516284B1|2016-08-15|
    引用文献:
    公开号 | 申请日 | 公开日 | 申请人 | 专利标题
    DE2545199A1|1974-10-15|1976-04-22|Itt Ind Gmbh Deutsche|PROCESS FOR MANUFACTURING INJECTION MOLDED PARTS AND INJECTION MOLDING MACHINE FOR CARRYING OUT THE PROCESS|
    EP0671251A1|1994-03-08|1995-09-13|FOBOHA GmbH|Injection moulding method and apparatus for carrying out the method|
    AT505321A1|2007-06-01|2008-12-15|Engel Austria Gmbh|Optical element e.g. thick-walled optical lens, manufacturing method for e.g. camera phone, involves injecting plastic in chamber, and manufacturing optical elements by injection processes maintained until plastic is hardened|
    EP2402140A1|2010-06-30|2012-01-04|Automotive Lighting Reutlingen GmbH|Method for producing a plastic lens of a motor vehicle lighting device, plastic lens produced according to the method and tool for producing the plastic lens|
    AT12415U1|2010-10-20|2012-05-15|Engel Austria Gmbh|METHOD FOR PRODUCING A MULTICOMPONENT INJECTION MOLDING PART|
    DE102014004766A1|2013-04-02|2014-10-02|Engel Austria Gmbh|Method and device for producing an injection-molded part|
    US5922250A|1996-11-05|1999-07-13|Bridgestone Corporation|Method of manufacturing optical-use plastic products|
    AT5441U1|2001-07-27|2002-07-25|Engel Gmbh Maschbau|METHOD FOR PRODUCING A PLASTIC BODY|
    DE102004018936A1|2004-04-20|2005-11-17|Robert Bosch Gmbh|Method and device for producing a hollow body|
    DE102005053979A1|2005-11-11|2007-05-24|Wilhelm Weber Gmbh & Co. Kg|Method and plastic injection device for producing a light guide body|
    US9176260B2|2013-02-26|2015-11-03|Sur-Seal Corporation|LED lens assembly|
    CN203792639U|2014-04-16|2014-08-27|锦湖光电有限公司|Double-material compression mold|DE102018112858A1|2018-05-29|2019-12-05|Zahoransky Automation & Molds GmbH|Method and device for producing injection molded parts|
    法律状态:
    优先权:
    申请号 | 申请日 | 专利标题
    ATA50712/2014A|AT516284B1|2014-10-06|2014-10-06|mold|ATA50712/2014A| AT516284B1|2014-10-06|2014-10-06|mold|
    DE102015012324.6A| DE102015012324B4|2014-10-06|2015-09-23|mold|
    DE102015017250.6A| DE102015017250B3|2014-10-06|2015-09-23|Molding tool|
    CN201510742374.5A| CN105479674B|2014-10-06|2015-09-29|For manufacturing the mold and method of optical element|
    US14/874,806| US20160096297A1|2014-10-06|2015-10-05|Molding tool and method for the production of an optical element|
    KR1020150140042A| KR101821859B1|2014-10-06|2015-10-05|Molding tool and method for the production of an optical element|
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