• 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 relates to a method for breaking out a punch fragment from a product. The method comprises the steps of: punching a fragment (260) at a desired position in the product (200), wherein the punch fragment (260) after the punching process passes through at least one hold point (200a, 200b) or hold film with the product (200) remains connected; forming a depression (262) in the region of the punch fragment (260); and breaking out the punch fragment (260) by means of a knockout tool, the formed recess (262) being sized such that upon breakout, the breakout tool or a portion thereof engages with the depression (262).
    公开号:NL2025718A
    申请号:NL2025718
    申请日:2020-06-02
    公开日:2020-12-11
    发明作者:Porada Daniel
    申请人:Marbach Werkzeugbau Gmbh；
    IPC主号:
    专利说明:

    METHOD AND DEVICE FOR BREAKING OUT A
    PUNCH FRAGMENT Technical domain The present invention relates to a method and an apparatus for breaking out a punch fragment from a product. State of the art The punching out of fragments is known in the packaging industry, for example to make small recesses or holes in a package (such as for example a cup or another container). Small recesses or holes can be used, for example, to hang the packaging in racks, or as a pouring or drinking opening. The packaging can be made from plastic material or another material, such as for instance from tin. In plastic packaging, thermoforming is often used as a manufacturing method. Thus, by fragments or punch fragments (both terms are used synonymously hereinafter) is meant small pieces of waste that remain attached to the package through at least one retention point or retaining film after punching the package. By retaining film is meant a connector that is slightly wider compared to a retention tip, and which, after the punch-out process, connects the punched-out fragment to the package. Using a breakout tool, the punched-out piece of debris (or fragment) is released from the package by cutting the at least one retaining point or the at least one retaining film. Thus, only the desired hole remains in the package. Figure 1 shows such a package as an example. In concrete terms, figure 1 shows a cup 10 with sealing edge 12, in which a hole 14 is provided at a desired position of sealing edge 12. The hole 14 is formed by punching out and breaking out the fragment
    16. The production of packaging is generally largely automated. In plastic packaging, such as, for example, plastic cups, thermoforming machines with associated thermoforming tools are preferably used to form cups from plastic film. Such thermoforming tools for forming cups are described, for example, in the patents DE 10 2016 103 237 A1 and DE 33 14 864 A1. The thermoforming tool in DE 33 14 864 A1 is moreover adapted to punch larger through openings in the bottom region of the molded plastic cup.
    Punching out and then breaking out the fragments also takes place automatically. A problem with the automatic breakout of the fragments is that they do not always come loose from the packaging. Such a situation is shown in Figures 2a-2d. In Figures 2a-2d, a piece of a package 100 with punched-out fragment 160 can be seen. In addition, Figure 2a is a top view of the package 100, while Figures 2b-2d show a side view along the line A-A of the package 100. The fragment 160 is connected to the package 100 via two holding points 100a, 100b after the punching process (Figure 2a). In a subsequent breakout process, the fragment 160 is broken out using a breakout tool (e.g., a breakout punch). The knockout member (hereinafter referred to as knockout member for short) is not shown in the figures. In Figures 2b-2d, only the movement of the striker relative to the breakout fragment 160 is illustrated by an arrow. In addition, it may happen that only one retaining point 1004 is cut through the action of the pusher member on the punched fragments 160, and the fragment 160 remains connected to the package 100 via the other retaining point 100b. As a result of that one-sided cutting, the fragment 160 tilts sideways and downwards (hinge effect> see Figures 2c and 2d). One consequence of that sideways tilting of the fragment 160 is that the striker slides past the fragment 160 without breaking it completely. The fragment 160 thereby remains attached to the package 100 (Figure 2d).
    It is an object of the present invention to provide a technique that enables reliable breakout of punched-out fragments. The technique should further be implementable / integratable into conventional packaging manufacturing processes, such as, for example, conventional thermoforming processes.
    Brief Description In order to solve the above problem (and additional problems), according to a first aspect, there is provided a method for breaking a punch fragment from a product, the method comprising the steps of: punching a fragment at a desired position in the product, wherein the punch fragment remains attached to the product through at least one holding point or holding film after the punching process; forming a depression in the region of the punch fragment; and breaking out the punch fragment by means of a knockout tool, wherein the recess formed is sized such that upon breakout the breakout tool or a portion thereof engages with the depression.
    Product is hereinafter meant a packaging product, such as for instance a cup or a lid. The packaging product can consist of plastic (plastic) or another moldable material, such as, for example, tinplate. If the product is a plastic product, it can be manufactured by thermoforming a plastic foil. Such a packaging product is hereinafter also referred to as a thermoformed product.
    The steps of punching the fragment and forming a depression in the fragment (or on the surface of the fragment) can be performed in a predetermined sequence. For example, the depression forming step may be performed prior to the fragment punching step. In that case, the fragment is punched at the position in the package (or packaging surface) where the recess is formed. However, it is also possible that the step of punching the fragment and forming the depression are performed essentially simultaneously. In both method variants, the punched fragment comprises the recess formed.
    The breakout tool can be sized to engage the recess formed. In one embodiment, the knockout tool may include a knockout punch (punch) sized to engage the depression formed in the fragment. In other words, the recess and the knockout tool (or the knockout of the knockout tool) can be dimensioned (dimensions) so matched that the knockout tool (or the knocker) when breaking out the fragment (and thus during the knockout process) can reach into the deepening.
    According to one embodiment, the product may be a thermoformed product, which is formed by thermoforming a plastic film by means of a thermoforming tool (of a thermoforming machine). The depression can be made (thermoformed) by means of the thermoforming tool. For example, the recess can be formed in the region of the punch fragment by the action of compressed air or a vacuum and / or with the aid of an impact element (pre-stretching element). The deepening of the punch fragment can thus be accomplished simultaneously with the thermal formation of the product.
    Alternatively, the depression can be stamped to the surface of the punch fragment by means of a stamping tool. If the product is a thermoformed product, which is formed by thermoforming a plastic film by means of a thermoforming tool, then the stamping tool for stamping the recess may be integrated into the thermoforming tool. (or in the forming station) of the thermoforming machine.
    The step of punching the fragment can be performed by means of a punching tool. The punching tool can be in the form of an (annular) punching line. The punch line may include at least one indentation for forming at least one retention point or retaining film. The punch tool may thereby form part of the thermoforming tool (or the forming station) of the thermoforming machine. By integrating the punch tool into the thermoforming tool (or molding station), the production of the product can be accelerated. However, it is also possible to provide a separate punching tool, separate from the thermoforming tool, which punches the product after exiting the thermoforming tool (or the forming station) of the thermoforming machine. Such a punching tool arranged separately from the thermoforming tool for punching the fragment may be housed in a punching out station of the thermoforming machine, which is provided for punching out the thermoformed product.
    Furthermore, the punched fragment can be broken out by means of a breakout tool located in the thermoforming machine. For example, the breakout tool may be housed in a (separate) breakout station of the thermoforming machine. Alternatively, it is also possible for the breakout tool to be integrated into the thermoforming tool (and thus in the forming station) or in the punch-out station of the thermoforming machine. In all embodiments mentioned here, the break-out tool can each comprise an impact element which is provided for breaking out the fragment. According to an additional aspect of the invention, there is provided a device for breaking out a punch fragment from a product. The apparatus includes a punching tool adapted to punch a fragment at a desired position in the product; a forming tool adapted to form a depression on the surface of the punch fragment; and a breakout tool adapted to break out the punched fragment, the breakout tool being sized such that on breakout the breakout tool or a portion thereof engages the recess of the fragment. The depression forming tool may be a tool adapted to thermoform the depression. The molding tool can herein be provided with a molding device (molding space) which reproduces the depth of the fragment, and into which the plastic plastic foil to be formed is pressed by means of compressed air or a vacuum created and / or by means of a thrust member. (pre-stretcher). For example, the molding tool may form part of a thermoforming tool for making a thermoformed product. In other words, the depression molding tool may be integrated into the thermoforming tool. The depression for the punch fragment is thus created (formed) with the thermoforming tool (lower tool part and / or upper tool part} in a similar manner to the product itself.
    Alternatively, the depression tool may be a stamping tool. The stamping tool may be configured to stamp the depression to the surface of the punch fragment. The stamping tool may be housed in the thermoforming tool of a thermoforming machine. In an additional aspect, a thermoforming machine is provided for thermoforming a product. The thermoforming machine includes a thermoforming tool adapted to form the product. Furthermore, the thermoforming machine comprises said apparatus for forming and breaking out a punch in the product.
    The forming tool of said apparatus may be housed in the thermoforming tool of the thermoforming machine. The punching tool of the apparatus may also be located in the thermoforming tool of the thermoforming machine, or in a punch-out station of the thermoforming machine located downstream of the thermoforming tool. The breakout tool (knockout member) of the device may be located in the thermoforming tool (i.e., in the forming station of the thermoforming machine), in the punch-out station of the thermoforming machine, or in a separate breakout station of the thermoforming machine. machine for thermoforming.
    The thermoforming tool can be a lower tool part! and comprising an upper tool part cooperating with the lower tool part, as described above. The upper tool part can be movable with respect to the lower tool part. Alternatively, the lower tool part may also be movable relative to the upper tool part. The lower tool part may include a molding device for molding the product and for molding the depression at a suitable location of the product. The upper tool part may include a pre-stretching means for pre-stretching the plastic film introduced between the lower tool part and the upper tool part.
    Brief description of the figures. Further particularities and advantages of the invention are explained in more detail with reference to drawings. It shows:
    in figure 1: a product with an additional punched-out part; in figures 2a to 2d: schematic representations illustrating the breaking out of a fragment according to the prior art; in figure 3: a flow chart representing a method for breaking out punch fragments according to the present invention; and in figures 4a to 4d: schematic representations which further clarify the operation of the method according to the invention described in connection with figure 3.
    Detailed Description Figures 1 and 2a-2d were discussed above in connection with the prior art.
    With reference to figure 3, a method according to the invention is now described for breaking punch fragments out of a product. For example, the product may be a thermoformed product formed by thermoforming a plastic film. Such a product can be an ordinary packaging, such as for instance a cup. A hole is then punched out at a predetermined location of the product.
    In step S10, a depression 262 is first formed at a desired (predetermined) position on the surface of the product 200. That recess 262 is part of a breakout fragment 260 (see Figures 4a and 4b -> product 200, fragment 260, recess 262). If the product 200 is a thermoformed product formed by a thermoforming tool by deforming a plastic film, then the step of forming the recess 262 at the desired position of the product 260 can be carried out essentially simultaneously with the formation of the product 260. In other words, the thermoforming tool (either the lower tool part, or the upper tool part, or both tool parts) is arranged to be adapted to form the additional depression at the position of the punch fragment.
    In a subsequent second step S20, at the position where the depression is formed, the fragment 260 is punched. By punching, the fragment 260 to be broken out is essentially separated from the surrounding material of the product 200. After the punching, the fragment 260 is only left by one or more (two in Figures 4a-4d) holding points 2004, 200b with the product 200 connected. The punch fragment 260 includes the depression of the surface 262 formed in step S10. The punch tool for punching the fragment 260 may be integrated in the thermoforming tool or separately mounted on the thermoforming machine.
    In a subsequent third step S30, the punch fragment 260 is then broken out by means of a breakout tool. The knockout tool may include a knockout punch (hereinafter referred to as knocker for short), which is sized to engage the recess 262 of the fragment 260 formed.
    An essential aspect of the invention is that the depression 262 of fragment 260 and breakout tool (or striker) are sized so that the breakout tool (or striker) can engage into depression 262 of fragment 260 in a breakout process. The technical operation of recess 262 is further described in connection with Figures 4a to 4d.
    Figure 4a shows (in top view) part of a product 200 into which a fragment 260 has been punched. The fragment 260 is connected to the product 200 via two opposed holding points 2004, 200b.
    As can be seen in Figures 4a and 4b, the fragment 260 is provided with a recess 262. The recess 262 is adapted to partially receive the striker.
    In Figs. 4b-4d, the breaking out process performed by the ram is further illustrated by means of the arrow 20. By moving the striker downward (see arrow 20 in Figures 4b-4d), the striker first contacts the fragment 260 and pushes it downward (Figure 4b). The downward pressing movement of the thrust member first breaks one of the two opposed holding points 2004, 200b (left holding point in Figure 4c). The fragment 260 then performs the lateral tilting movement described in connection with Figures 2a-2d, since the fragment is still suspended from the other retention point (right retention point 220b in Figure 4c). The depression 262 and at least partial engagement of the striker in the depression 262 of the fragment 260 prevent the striker from sliding past the fragment 260, as is possible, for example, in the configuration described in connection with Figure 2c.
    Instead, the thrust member abuts the side wall 264 of the recess.
    The further downward movement of the thrust member exerts a compressive force on the side wall 264 (and consequently on the fragment 260) without interruption, until finally the right holding point 220b also breaks and the fragment.
    ment 260 has been completely detached from the product (Figure 4d). The operation of the present invention becomes immediately apparent from the fabrication in Figures 4a to 4d.
    The fact that the fragment is provided with a recess into which the break-out tool (impact member) can engage, the impact element is prevented from sliding past the fragment upon breakout.
    This enables reliable breakout of small punch fragments from a product.
    权利要求:
    Claims (17)
    [1]
    A method for breaking out a punch fragment from a product (200), comprising: - punching a fragment (260) at a desired position in the product (200), wherein the punch fragment (260) after the punching process is at least one retention point (200a, 200b) or retention film remains attached to the product (200); - forming a depression (262) in the region of the punch fragment (260); and - breaking out the punch fragment (260) by means of a breakout tool, the formed recess (262) being sized such that upon breakout, the breakout tool or a portion thereof engages the recess (262).
    [2]
    The method of claim 1, wherein the depression (262) is first formed in the fragment (260) and the fragment (260) is then punched.
    [3]
    A method according to any one of the preceding claims, wherein the punch fragment (260) is broken out with the aid of a knocker of the breaking tool.
    [4]
    The method of claim 3, wherein the formed recess (262) is sized such that upon breakout, the breakout tool impact member engages the formed recess (262).
    [5]
    A method according to any preceding claim, wherein the product (200) is a thermoformed product formed by thermoforming a plastic film by means of a thermoforming tool located in a thermoforming machine.
    [6]
    The method of claim 5, wherein the depression (262) is thermoformed by means of a thermoforming tool located in the thermoforming machine.
    [7]
    The method of claim 5 or 6, wherein the recess (262) is stamped into the surface of the punch fragment (260) by means of a stamping tool located in the thermal forming machine.
    [8]
    A method according to any one of claims 5 to 7, wherein the step of punching the fragment (260) is performed by means of a punching tool located in the thermoforming machine.
    [9]
    The method of any one of claims 5 to 8, wherein the punch fragment (260) is broken out by means of a breakout tool located in the thermoforming machine.
    [10]
    The method of any of claims 5 to 8, wherein the punch fragment (260) is broken out by means of a breakout tool integrated into a stacker.
    [11]
    Apparatus for breaking out a punch fragment (260) from a product (200), comprising: - a punching tool adapted to punch a fragment (260) at a desired position in the product (200) ; - a forming tool adapted to form a recess (262) on the surface of the punch fragment (260); and - a breakout tool adapted to break out the punched fragment (260), the breakout tool being sized such that on breakout the breakout tool or a portion thereof engages the recess (262) of the fragment (260) .
    [12]
    The device of claim 11, wherein the molding tool is configured to thermoform the depression (262).
    [13]
    The apparatus of claim 11, wherein the forming tool is a stamping tool adapted to stamp the recess (262) to the surface of the punch fragment (260).
    [14]
    A thermoforming machine for thermoforming a product (200), comprising: - a thermoforming tool adapted to form the product (200); - the device according to claims 11 to 13 for forming and breaking out a punch fragment (260) in the product (200).
    [15]
    A thermoforming machine according to claim 14, wherein the forming tool of the device is integrated with the thermoforming tool.
    [16]
    A thermoforming machine according to claim 14 or claim 15, wherein the punching tool of the device is integrated with the thermoforming tool or located in a punch-out station of the thermoforming machine located downstream of the thermoforming tool. mical forms.
    [17]
    A thermoforming machine according to any one of claims 14 to 16, wherein the breakout tool of the device in the thermoforming tool is located in a punch-out station located downstream of the thermoforming tool , or in a breakout station of the thermoforming machine.
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    同族专利:
    公开号 | 公开日
    NL2025718B1|2021-10-26|
    DE102019115318A1|2020-12-10|
    引用文献:
    公开号 | 申请日 | 公开日 | 申请人 | 专利标题
    DE3314864A1|1983-04-23|1984-10-25|Adolf Illig Maschinenbau Gmbh & Co, 7100 Heilbronn|Mould for the thermoforming of containers of thermoplastic film|
    DE102016103237B4|2016-02-24|2020-01-23|Marbach Werkzeugbau Gmbh|Thermoforming tool for the manufacture of cup-shaped objects|
    法律状态:
    优先权:
    申请号 | 申请日 | 专利标题
    DE102019115318.2A|DE102019115318A1|2019-06-06|2019-06-06|Technology for breaking out punched slugs|
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