JP3107355U - Punching device for sheet molding - Google Patents

Abstract

An object of the present invention is to cut an intermediate portion of a molded sheet while retaining a concavo-convex projecting molded portion so that only a necessary part as a molded product can be punched out from the projecting molded portion.
A punching tool includes a lower mold 7 having a recess 13 into which a protruding surface 16 of a protruding molded part 5 formed on a molded sheet 2 is fitted, and a protruding part 20 fitted into a protruding back surface 18 of the protruding molded part 5. And an upper die 8 that presses the molded sheet 2 against the lower die 7. A concave blade 13 of the lower die 7 is provided with a cutting blade 6 for cutting the protruding molded portion 5. The first cutting blade portion 14, which bisects the concave portion 13 through the middle of the two opposing points of the concave portion 13 of the lower mold 7 and cuts the middle of the protruding molded portion 5, and the first cutting blade portion 14. A second cutting blade 15 that cuts around the base portion 5a of the projecting molded portion 5 is connected to at least one side of the projection portion 5 to form an annular shape, and the protrusion 20 of the upper mold 8 includes the first cutting blade portion. A groove 21 into which 15 is fitted is formed.
[Selection] Figure 1

Description

  The present invention relates to a punching device for sheet molded products.

2. Description of the Related Art Conventionally, as a punching device for a sheet molded product, there is one in which a plurality of punching units each having a punching blade are provided on a mounting plate (see, for example, Patent Document 1). In this punching device, the punching blade is formed in an annular shape on the upper surface of the housing, so that a plurality of container-shaped molded articles (tray) can be manufactured by punching around the base of the concave and convex molding portion of the molding sheet. It has become.
Japanese Patent Laid-Open No. 9-47999 (page 3, FIG. 1)

With a conventional punching device, the projection-shaped projection portion having the concave and convex shape can be cut around the base, but if the middle of the projection-molded portion is cut, the projection height of the molding portion is higher than the height of the cutting blade. Therefore, the protruding molded part cannot be cut to the end. Even if the height of the cutting blade is increased, the protruding molded part is not retained, so that the protruding molded part may be crushed and deformed during cutting.
In view of this, the present invention provides a sheet molded article punching device that can cut a halfway of a molded sheet while retaining the concavo-convex shaped protruding molded part so that only a necessary part can be punched from the projected molded part. The purpose is to provide an extraction device.

In order to achieve the above object, the present invention takes the following technical means.
That is, the punching device for a sheet molded product includes a lower mold 7 having a recess 13 into which the protruding surface 16 of the protruding molded portion 5 formed in the molded sheet 2 is fitted, and a protruding portion that fits into the protruding back surface 18 of the protruding molded portion 5. 20 and an upper die 8 for pushing the molding sheet 2 into the lower die 7. The recess 13 of the lower die 7 is provided with a cutting blade 6 for cutting the protruding molded portion 5. The blade 6 includes a first cutting blade portion 14 that bisects the concave portion 13 through two intermediate points of the concave portion 13 of the lower mold 7 and cuts the middle 5b of the protruding molded portion 5; A second cutting blade 15 that cuts around the base portion 5a of the projecting molding portion 5 is connected to at least one side of the blade portion 14 to form an annular shape. A groove 21 into which the cutting blade portion 14 is fitted is formed.

According to this, the recess 13 of the lower mold 7 retains the outer periphery of the projecting molded part 5, and the projecting part 20 of the upper mold 8 retains the inner periphery of the projecting molded part 5, so that the projecting process is performed during cutting. The shape of the portion 5 can be retained, and the first cutting blade portion 14 fits into the groove 21 formed in the protruding portion 20 and cuts the middle 5b of the protruding molded portion 5, so that the middle 5b of the projected molded portion 5 is crushed. The molded product 3 can be punched out from the molded sheet 2 by cutting around the base portion 5a of the protruding molded portion 5 by the second cutting blade portion 15 without cutting.
The lower die 7 is provided with an elastic body having a contact surface 12 that sandwiches the molded sheet 2 together with the upper die 8 outside the recess 13, and the contact surface 12 is formed from the upper end of the cutting blade 6. Is also arranged above.

According to this, it can cut | disconnect in the state which pinched | interposed the shaping | molding sheet 2 with the lower mold | type 7 and the upper mold | type 8, and when the upper mold | type 8 is pressed, the elastic body will shrink | contract and the shaping | molding sheet 2 fitted in the recessed part 13 will be shown. The protruding molded part 5 can be guided to the cutting blade 6, and the molded article 3 can be formed from the molded sheet 2 in a state where the cutting blade 6 is housed in the recess 13 while preventing deformation, positional blurring and the like of the protruding molded part 5. Can be punched out.
Moreover, the extrusion means 9 which extrudes the molded article 3 formed by cutting the molded sheet 2 from the concave portion 13 of the lower mold 7 is provided.

  According to this, the molded product 3 punched by the punching tool can be easily taken out from the lower mold 7.

  According to the present invention, it is possible to cut only a necessary portion as a molded product from the protruding molded portion by cutting the middle while retaining the uneven protruding molded portion of the molded sheet.

Embodiments of the present invention will be described below with reference to the drawings.
A punching device 1 for a sheet molded product according to the present invention is for punching a desired molded product 3 from a molded sheet 2 formed in an uneven shape by vacuum forming.
As shown in FIG. 10, the molded product 3 is arranged inside a packaging container 4 for wrapping a product, and is used for positioning the product in the packaging container 4 or for distinguishing between a product and a product description, for example. It is done.
The molded product 3 has a peripheral concave portion 3b outside the central convex portion 3a, and has a rising wall 3c outside the peripheral concave portion 3b. If the peripheral recess 3b and the rising wall 3c are formed around the entire periphery, a product manual or the like cannot be inserted, so one side of the molded product 3 is a cut-off end surface, and a molded product having such a cut-off end surface. Since it is difficult to form a large number 3 from one molded sheet 2 at the same time, a molded product 3 having a required shape is formed by using a part of the protruding molded portion 5 having the peripheral recess 3b and the rising wall 3c. There is a need.

As shown in FIG. 1, the molded product 3 is manufactured by cutting the base 5 a and the middle (intermediate part) 5 b of the protruding molded part 5 formed on the surface 2 a side of the molded sheet 2 with a punching tool 1. .
1 and 2, a punching tool 1 includes a lower mold 7 having a cutting blade 6 for cutting the molded sheet 2, an upper mold 8 for pressing the molded sheet 2 against the cutting blade 6, and a molded product 3 as a lower mold. 7 has an extrusion means 9 for extruding from 7. The punching device 1 is configured to punch the molded product 3 from the protruding molded part 5 by sandwiching the molded sheet 2 between the lower mold 7 and the upper mold 8 and pressing the upper mold 7.
The lower mold 7 has a plate shape, and has a wooden or metal substrate 10 and a cushion sheet 11 provided on the surface (upper surface) side of the substrate 10, and two layers of the substrate 10 and the cushion sheet 11. It has a structure. The cushion sheet 11 is made of an elastic body and is fixed to the substrate 10 with an adhesive or the like. An outer surface (upper surface) of the cushion sheet 11 on the outer side of the recess 13 is a contact surface 12 with which the surface of the molded sheet 2 comes into contact. The contact surface 12 is disposed above the upper end of the cutting blade 6.

A large number of protruding molded parts 5 are aligned on one molded sheet 2, and a large number of recesses 13 are formed on the surface side of the lower mold 7 corresponding to the large number of protruding molded parts 5. Each recessed part 13 is made into the substantially square shape by planar view, and is formed a little larger than this protrusion molding part 5 so that the protrusion molding part 5 of the shaping | molding sheet 2 may fit.
A cutting blade 6 for cutting the protruding molded portion 5 of the molded sheet 2 is provided in the concave portion 13. The cutting blade 6 uses a Thomson blade, and a lower portion thereof is embedded and fixed in a groove formed in the substrate 10 of the lower mold 7.

As shown in FIGS. 2 and 3, the cutting blade 6 includes a first cutting blade portion 14 that cuts the middle 5 b of the protruding molded portion 5 and a second cutting blade that cuts around the base portion 5 a of the protruding molded portion 5. Part 15.
The first cutting blade portion 14 is a straight blade and is provided so as to cross between the opposing long sides of the concave portion 13 of the lower mold 7. The 1st cutting blade part 14 is arrange | positioned so that the recessed part 13 may be divided into two between the arbitrary points of each long side of the recessed part 13, ie, the intermediate | middle of two points which the recessed part 13 opposes.
The second cutting blade portion is provided on one side of the first cutting blade portion 14 near one of the long sides of the pair of recesses 13, and is formed in a substantially U shape along the side wall 13 a of the recess 13. The second cutting blade portion 15 is disposed in close contact with the side wall 13 a of the recess 13.

Both end portions of the U-shaped second cutting blade portion 15 are in contact with and connected to the first cutting blade portion 14. Thus, the cutting blade 6 is formed in an annular shape by connecting the first cutting blade portion 14 and the second cutting blade portion 15 together.
The cutting blade 6 may be configured to have a first cutting blade portion 14 and a second cutting blade portion 15 as separate blades that are connected to the substrate 10 of the lower mold 7 to be annular. The first cutting blade portion 14 and the second cutting blade portion 15 may be integrated and attached to the substrate 10.
In FIG. 1, a substrate 10 of a lower mold 7 is formed with a vertically penetrating hole 17. The hole 17 has a quadrangular shape in plan view and is provided inside the annular cutting blade 6. The molded product 3 molded by the punching instrument 1 is pushed out by the pushing means 9 through the hole 17.

As shown in FIGS. 2 and 4, the upper mold 8 includes a resin-made or wooden flat substrate 19 and a protrusion 20 formed on one surface of the substrate 19 so as to protrude in the thickness direction. A large number of the protrusions 20 are formed on the substrate 19 so as to have the same number and the same positions as the protrusions 5 of the formed sheet 2 and the recesses 13 of the lower mold 7.
A groove 21 into which the first cutting blade portion 14 is fitted is formed in the protruding portion 20. The depth of the groove 21 is smaller than the vertical length of the cutting blade 6.
The extruding means 9 has a flat substrate 22 and an extruding protrusion 23 formed on one surface of the substrate 22. The extrusion protrusion 23 has a size that can be inserted into the hole 17 formed in the lower mold 7.

A method for cutting the molded sheet 2 with the punching device 1 will be described below. First, the molded sheet 2 formed into a concavo-convex shape by vacuum forming is placed on the lower mold 7 so that the protruding surface 16 of the protruding molded part 5 fits into the concave part 13 of the lower mold 7. Then, the projection 20 of the upper mold 8 is placed on the molding sheet 2 so as to fit the protruding back surface 18 of the protruding molding portion 5. As a result, the molded sheet 2 is sandwiched between the substrate 19 of the upper mold 8 and the contact surface 12 of the cushion sheet 11 of the lower mold 7.
The upper mold 8 is pressed from the state in which the molded sheet 2 is sandwiched between the upper mold 8 and the lower mold 7. If it does so, the 1st cutting blade part 14 will contact | abut on the middle 5b of the protrusion shaping | molding part 5, and will cut | disconnect this middle 5b. At this time, the first cutting blade portion 14 enters the groove 21 formed in the protruding portion 20 of the upper mold 8, and cuts the middle 5 b of the protruding molded portion 5 while proceeding to the depth of the groove 21. In this case, since the height of the 1st cutting blade part 14 is larger than the depth of the groove | channel 21, the protrusion shaping | molding part 5 protruded and formed in the surface 2a of the shaping | molding sheet 2 is cut | disconnected from the protrusion end to the base 5a side. be able to.

Since the cutting blade 6 is formed in an annular shape by connecting the first cutting blade portion 14 and the second cutting blade portion 15, the molded product 3 having a predetermined shape can be punched out from the protruding molded portion 5 of the molded sheet 2. .
In addition, since the protruding surface 16 of the protruding molded part 5 is fitted and held in the recess 13 of the lower mold 7, and the protruding part 20 of the upper mold 8 is fitted and held on the protruding back surface 18 of the protruding molded part 5, The protruding molded part 5 is cut without being crushed by the cutting blade 6.
On the other hand, the cushion sheet 11 of the lower mold 7 is elastically deformed by being pressed against the upper mold 8 and contracts downward. At this time, the contact surface 12 of the cushion sheet 11 is pressed against the upper mold 8 and moves downward. Further, the side surface 11a portion of the cushion sheet 11 constituting the side wall 13a of the recess 13 bulges inside the recess 13 as shown in FIG. 5 (hereinafter, the bulged portion is referred to as a bulging portion 24).

Further, the side surface of the protruding molded portion 5 of the molded sheet 2 is slightly bulged outwardly by being pressed against the upper mold 8. At this time, the bulging portion 24 of the cushion sheet 11 comes into contact with the side surface of the protruding molded portion 5 and suppresses the outward bulging of the side surface of the protruding molded portion 5.
When the upper die 8 is further pressed in a state where the bulging portion 24 of the cushion sheet 11 is in contact with the side surface of the protruding molding portion 5, the second cutting blade portion 15 does not hit the side surface of the protruding molding portion 5, and the protruding molding is performed. It contacts the base 5a of the part 5. That is, the bulging portion 24 of the cushion sheet 11 guides the second cutting blade portion 15 to the base portion 5 a without hitting the side surface of the protruding molded portion 5. Thus, the cushion sheet 11 of the lower mold 7 serves as a guide means 25 for guiding the second cutting blade portion 15 to the base portion 5 a of the protruding molded portion 5 without hitting the side surface of the protruding molded portion 5.

The upper surface (the contact surface 12) of the cushion sheet 11 is compressed to the position of the upper end of the cutting blade 6, and further, the periphery of the base portion 5a of the protruding molded portion 5 is cut by the second cutting blade portion 15 by pressing the upper die 8. At the same time, the cutting of the protruding portion 5 by the first cutting blade portion 14 is completed in the middle 5b, and the molded product 3 having a predetermined shape is punched from the molded sheet 2.
When punching of the molded product 3 is completed, the extrusion projection 23 of the extrusion means 9 is inserted through the hole 17 formed in the lower mold 7. Thereby, the molded product 3 in the lower mold 7 is pushed out from the lower mold 7. Thus, by using the extrusion means 9, a plurality of molded articles 3 remaining in the respective concave portions 13 of the lower mold 7 can be taken out at a time, and work efficiency can be improved.

In the second embodiment shown in FIGS. 7 to 9, the shape of the cutting blade 6 and the position of the groove 21 of the protrusion 20 of the upper mold 8 are different from those in the first embodiment. That is, the second cutting blade portion 15 is provided on both sides of the first cutting blade portion 14 and extends along the entire circumference of the side wall 13 a of the recess 13.
As shown in FIG. 7, the first cutting blade portion 14 is disposed at the center position of two opposing points of the concave portion 13 and bisects the concave portion 13.
The two second cutting blade portions 15 are arranged symmetrically with respect to the first cutting blade portion 14. Two holes 17 are formed in the lower mold 7, and each hole 17 is provided between the first cutting blade portion 14 and the second cutting blade portion 15.

On the other hand, the groove 21 of the protrusion 20 of the upper mold 8 is formed at the center position of the protrusion 20 so that the first cutting blade 14 fits as shown in FIG.
With such a configuration, as shown in FIG. 9, the punching instrument 1 can simultaneously punch two symmetrical shaped products 3 from one protruding molded portion 5. Other points are the same as those in the first embodiment, and the same effects are produced.
The molded product 3 punched by the punching device 1 can be formed in various shapes. For example, the punching device 1 is a halfway (midway portion) of the protruding molded portion 5 even if the molded product 3 is a truncated cone shape shown in FIG. 11A or a hemispherical shape shown in FIG. ) 5b can be cut.

  In the above embodiment, a plurality of concave portions 13 are formed in the flat lower mold 7 and the cutting blades 6 are provided in the respective concave portions 13. A plurality of units may be provided on separate plate members. In this case, a desired number of molded articles 3 can be manufactured by increasing or decreasing the number of units, which is very convenient.

It is sectional drawing which shows a punching instrument. It is a perspective view of a punching instrument. It is a top view of a lower mold. It is a bottom view of the upper mold. It is sectional drawing of a cutting blade. It is a perspective view which shows the state by which a molded article is punched out from a molded sheet. It is a top view of the lower mold | type which shows 2nd Embodiment of this invention. It is a bottom view of the same mold. It is a perspective view which shows the state by which a molded article is punched from a molded sheet with the punching tool of 2nd Embodiment. It is a perspective view which shows the state by which the molded article has been arrange | positioned in the packaging container. It is a perspective view which shows other embodiment of a molded article.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 Punching tool 2 Molding sheet 3 Molded product 5 Projection molding part 5a Base 6 Cutting blade 7 Lower mold 8 Upper mold 9 Extruding means 13 Projection part 14 First cutting blade part 15 Second cutting blade part 25 Guide means

Claims (3)

The lower mold (7) having a recess (13) into which the protruding surface (16) of the protruding molded part (5) formed on the molded sheet (2) is fitted, and the protruding back surface (18) of the protruding molded part (5) An upper mold (8) that has a protrusion (20) to be fitted and pushes the molded sheet (2) into the lower mold (7);
The recess (13) of the lower mold (7) is provided with a cutting blade (6) for cutting the protruding molded part (5), and the cutting blade (6) is provided with the recess (13) of the lower mold (7). A first cutting blade portion (14) for cutting the middle portion (5b) of the protruding molded portion (5) by dividing the concave portion (13) into two through the middle of the two opposing points, and the first cutting blade portion (14) is connected to the second cutting blade (15) for cutting around the base (5a) of the protruding molded part (5) on at least one side of the protruding molded part (5), and is annular.
A punching device for sheet molded product, wherein a groove (21) into which the first cutting blade (14) is fitted is formed in the protrusion (20) of the upper mold (8).   The lower mold (7) is provided with an elastic body having a contact surface (12) sandwiching the molded sheet (2) together with the upper mold (8) outside the recess (13). ) Is disposed above the upper end of the cutting blade (6).   3. An extrusion means (9) for extruding a molded product (3) formed by cutting the molded sheet (2) from the recess (13) of the lower mold (7) is provided. A punching device for sheet molded products according to 1.

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