JP2004090161A - Structure of punching die for punching machine - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a structure of a punching die for a punching machine which sets a plastic sheet with a large number of formed bodies in an arranged manner without leaving the sheet somewhere else after the forming, and generates no cut-off losses. <P>SOLUTION: A single or a plurality of punching blades 2 are fixed to a fitting plate 3, and the fitting plate is fitted to a substrate 6 movably within a small allowance. More specifically, a loose hole having the diameter slightly larger than the diameter of a screw 8 to be used is formed in the fitting plate, and the fitting plate is fitted to the substrate by passing the screw through the loose hole 4, and screwing it to a resin plate 5 provided on the substrate movably within a range of the difference between the diameter of the loose hole and the diameter of the screw. <P>COPYRIGHT: (C)2004,JPO

Description

[0001]
TECHNICAL FIELD OF THE INVENTION
The present invention relates to a die structure for a punching machine for simultaneously punching a large number of molded articles from a plastic molded sheet formed by aligning a large number of molded articles (for example, containers).
[0002]
[Prior art]
Conventionally, in order to increase productivity in manufacturing a plastic molded body, for example, a cup-shaped container, a plastic molded sheet 20 in which a large number of molded bodies 21 are arranged and formed as shown in FIG. Thereafter, as shown in FIG. 8, a large number of molded bodies 21 are punched out of the plastic molded sheet 20 at the same time to manufacture. This punching (cutting) is performed using a die.
[0003]
In this punching die, a punching blade (cutting blade) is provided at a position corresponding to a cutting position of a large number of molded bodies 21 aligned and formed on a plastic molded sheet 20 as shown in FIG. FIGS. 4 to 6 show an example of die removal in the case where the molded body 21 is cut from a plastic molded sheet 20 in which a large number of molded bodies 21 are aligned and molded as shown in FIG.
FIG. 4 is a perspective view showing a conventional die release, FIG. 5 is a perspective view for explaining a use state of the conventional die release, and FIG. 6 is a sectional partial explanatory view of the conventional die release. The punching die 10 has a circular punching blade (cutting blade) 11 implanted and fixed in a mounting plate 12, and the mounting plate 12 is mounted on a substrate 16 via a resin plate 15. In this example, two punching blades 11 are provided on the mounting plate 12, but this may be one or three or more. Each punching blade 11 is located corresponding to a cutting (cutting) position of the molded body 21 of the plastic molded sheet 20.
[0004]
As a result, when the plastic molded sheet 20 is set in the die 10 as shown in FIG. 5, each molded body 21 corresponds to the punching blade 11, and as shown in FIG. The cutting blade 11 fits into and fits into the cutting blade 11, and the cutting position is the position of the punching blade 11. Therefore, if the punching die 10 is used for a punching machine (die cutter), the molded body 21 can be easily punched and manufactured.
[0005]
[Problems to be solved by the invention]
However, since the plastic molded sheet 20 in which a large number of molded bodies 21 are aligned and molded is molded by heating, shrinkage occurs after molding. The plastic molded sheet 20 has a large number of (for example, 50 to 100) molded bodies 21 aligned and molded in order to enhance productivity, and thus has a large shrinkage width. Accordingly, the position of the molded body 21 of the plastic molded sheet 20 is not fixed until the shrinkage stops, and the position of the punching blade 11 is fixed. In addition, if there is an object in which the positions of the punching blade 11 and the molded body 21 do not match, punching cannot be performed, and the punching blade 11 is destroyed. Therefore, the conventional molded plastic sheet 20 is left for 3 to 4 days, waits for the shrinkage to settle, and then is set in the die 10 to be cut (cut).
[0006]
However, this causes a loss of time to be left for three to four days, and also lowers work efficiency. In addition, there is a problem that a storage place is required to be stored during that time because it is left for three to four days. In addition, when there is a molded body 21 that does not fit in the punching blade 11 of the die 10 in the plastic molded sheet 20 after the shrinkage is settled, the part of the molded body 21 that does not fit the die 10 is cut out and fitted to the die 10. Like that.
[0007]
However, this cutting operation is troublesome and troublesome, and loss occurs at the cutting portion, thereby lowering the manufacturing efficiency. Since the loss portion is as large as 20 to 30%, for example, only 70 to 80 pieces can be formed from the plastic molding sheet 20 in which 100 moldings 21 are aligned and molded. That is, the efficiency of the die 10 is 70 to 80%. Therefore, even if one punching machine can handle the problem, there is a disadvantage that two machines must be installed.
Further, in order to increase the productivity, it is sufficient to form a large plastic molding sheet 20 in which as many moldings 21 as possible are aligned and molded. However, the shrinkage rate increases and the cutting loss increases. In consideration of this, the size to be formed is limited and cannot be made too large.
[0008]
The present invention has been proposed in view of such a point, and an object of the invention is to set a plastic molded sheet on which a large number of molded articles are aligned and formed without leaving it after molding, and to produce a punching sheet that does not cause cutting loss. An object of the present invention is to provide a punching structure for a punching machine.
[0009]
[Means for Solving the Problems]
In order to solve the above-mentioned problem, in the punching die structure for a punching machine according to the present invention, one or a plurality of punching blades are fixedly mounted on a mounting plate, and the mounting plate is mounted on a substrate so as to be freely movable in a small range. It is characterized by the following.
Therefore, even if there is a molded product that does not fit the punching blade of the die in the plastic molded sheet where a large number of molded products are aligned and molded, if the plastic molded sheet is set, the punching blade in that part will have the punching blade Since the position of the mounting plate provided with is moved so that it fits, the die can be set without removing the portion. Therefore, a large plastic molding sheet can be set and cut into a die without leaving it after molding, cutting loss does not occur, the die-cutting efficiency can be 100%, and as many molded bodies as possible are aligned and formed. And productivity can be increased.
[0010]
Further, in the structure of the punching die for a punching machine according to the present invention, the mounting plate is provided with a stupid hole having a diameter slightly larger than the diameter of a screw to be used, and the mounting plate is provided with a screw inserted into the stuck hole to be mounted on a substrate. By screwing to the provided resin plate, it is mounted so as to be freely movable in the range of the diameter of the stupid hole larger than the diameter of the screw.
This allows the mounting plate to move freely within the range of the stupid hole. Therefore, even if the molded body of the plastic molded sheet has a molded body whose position does not match the punching blade of the punching die, when the punching blade is set in the punching die, the mounting plate provided with the punching blade moves freely. (Move), so that all the molded articles of the plastic molded sheet coincide with the punching blade.
[0011]
BEST MODE FOR CARRYING OUT THE INVENTION
Hereinafter, embodiments of the present invention will be described in detail with reference to the drawings. FIG. 1 is an explanatory perspective view of a die showing an embodiment of the present invention, FIG. 2 is a sectional perspective view of a main part of the die showing an embodiment of the present invention, and FIG. 3 is a drawing of a main part of the die showing an embodiment of the present invention. It is a fragmentary sectional view.
[0012]
The punching die 1 is configured such that two punching blades 2 are fixed to a mounting plate 3, and a predetermined number of the mounting plates 3 are movably mounted on a substrate 6 by screws 8.
The punching blade 2 has a shape corresponding to the shape of the molded body to be punched. In this example, as shown in FIG. 7, a number of molded articles 21 aligned and molded on a plastic molded sheet 20 are circular because they are cup-shaped containers. The molded body 21 is fitted and set inside the circular punching blade 2 and set.
[0013]
The mounting plate 3 is provided on the substrate 6 via the resin plate 5. Specifically, as shown in FIGS. 2 and 3, the mounting plate 3 is provided with a through hole 4 slightly larger in diameter than the diameter of the shaft portion 8 a of the screw 8. 4 and is freely mounted by screws 8 screwed into screw holes 5 a of a resin plate 5 provided on the substrate 6. That is, the mounting plate 3 is free to move within the range since the diameter of the stupid hole 4 is larger than that of the shaft portion 8a of the screw 8. At this time, a holding plate 9 is interposed between the head 8b of the screw 8 and the mounting plate 3 to prevent the mounting plate 3 from coming off. Further, an auxiliary plate 7 may be interposed between the resin plate 5 and the substrate 6 as shown in FIG. In this example, since the molded body 21 is a cup-shaped container and has a depth, the auxiliary plate 7 is provided in order to secure the depth distance.
[0014]
Therefore, since the mounting plate 3 has the stupid hole 4 having a diameter slightly larger than the diameter of the shaft 8a of the screw 8, the mounting plate 3 can be moved from the shaft 8a of the screw 8 by the diameter of the stupid hole 4. It is freely movable in the range. When the position of the mounting plate 3 moves and is adjusted, the position of the punching blade 2 provided on the mounting plate 3 is also adjusted.
Further, as shown in FIG. 1, a predetermined number of the mounting plates 3 (the number of the punching blades 2 matching the number of the molded bodies 21) are mounted on the substrate 6, so that the mounted mounting plates 3 If it is mounted so that it cannot be moved closely, the mounting plate 3 cannot be moved and its position cannot be adjusted even if it can be moved between the screw 8 and the stupid hole 4. Therefore, a small gap is formed between the mounting plates 3 and h is mounted. In addition, in the molding of the plastic molding sheet 20, the shrinkage, the shape, the molding conditions, etc., and the shrinkage after molding are determined by the large diameter of the fool hole 4 and the gap h between the mounting plates 3 from the shaft 8a of the screw 8. In the case of, when the molded body 21 is displaced, the position is adjusted within the range, so that the range in which the molded body 21 can move is small. Accordingly, the large diameter portion and the gap h may be small.
[0015]
Thus, according to the die 1, even if there is a molded body 21 that is not aligned with the punching blade 2 of the die 1 on the plastic molded sheet 20 on which a large number of molded bodies 21 are aligned and molded, the plastic molding is performed. When the sheet 20 is set, the mounting plate 3 moves freely, and the position of the punching blade 2 coincides with the molded body 21 that has shifted. Therefore, even if there is a molded body 21 in which the position is shifted from any one of the punching blades 2 of the die 1 in the plastic molded sheet 20 on which a large number of molded bodies 21 are aligned and molded, if the plastic molded sheet is set, the mounting is performed. The plate 3 moves correspondingly and adjusts the position so that the position of the punching blade 2 coincides with the shifted molded body 21 and can be set on the die 1.
[0016]
As a result, even if there is a molded body 21 having a misalignment with any one of the punching blades 2 of the die 1 on the plastic molded sheet 20 on which a large number of molded bodies 21 are aligned and molded, even if the part is not cut off, the die is removed. 1 and can be cut, cutting loss does not occur, and the punching efficiency of the die 1 can be 100%. In addition, since the plastic molded sheet 20 in which a large number of molded bodies 21 are aligned and molded can be set and cut into the die 1 without leaving after molding, a space for accommodating while leaving is unnecessary. Furthermore, the plastic molding sheet 20 in which a large number of moldings 21 are aligned and molded can be handled by the die 1 even if the shrinkage rate is large with a large plastic molding sheet 20 in which as many moldings 21 are molded as possible. Therefore, the plastic molded sheet 20 formed by molding as many molded bodies 21 as possible can be formed, and the productivity can be improved.
[0017]
The above embodiment does not limit the present invention, and the present invention can be variously modified without departing from the gist.
For example, in the above-described embodiment, two punching blades 2 are provided on one mounting plate 3, but the number of the punching blades may be one or three or more. Further, the shape of the punching blade 2 is formed in accordance with the molded body 21 to be punched, and is arbitrary. Further, the molded body 21 of the plastic molded sheet 20 in which a large number of molded bodies 21 are aligned and molded in the above embodiment is a cup-shaped container, but the shape of the molded body 21 is not specified. Not optional. Further, the type of the screw 8 and the position where the screw 8 is to be fixed are not particularly specified. Further, the configuration in which the mounting plate 3 is freely movable is not specified in the above embodiment.
[0018]
【The invention's effect】
As described in detail above, according to the punching die for a punching machine of the present invention, the following effects can be obtained.
(1) Even if a plastic molded sheet in which a large number of molded bodies are aligned and molded has a molded body that is misaligned with one of the punching blades of the die, the punching blade is set when the plastic molded sheet is set. By adjusting the position of the provided mounting plate correspondingly, the position of the punching blade can be set to a position that matches the shifted molded body, and cutting can be performed.
[0019]
(2) Even if there is a molded body having a misalignment with any of the punching blades in a plastic molded sheet on which a large number of molded bodies are aligned and molded, even if the part is not cut off as in the related art, the mold is removed. And cutting is possible. Therefore, no cutting loss occurs, and the punching efficiency of the punching can be 100%.
[0020]
(3) A plastic molded sheet on which a large number of molded articles are aligned and molded can be set in a die after molding without cutting and waiting for the shrinkage to settle. No space is required, and there is no time loss, thus improving work efficiency.
[0021]
(4) As many molded articles as possible can be formed and a large plastic molded sheet having a large shrinkage rate can be handled, so that productivity can be increased.
[0022]
(5) The punching efficiency is 100%, and it is possible to cope with a large plastic molded sheet in which as many moldings as possible are aligned and molded, and the productivity is high. Becomes possible.
[Brief description of the drawings]
FIG. 1 is an explanatory perspective view of a die showing an embodiment of the present invention.
FIG. 2 is a cross-sectional perspective view of a main part of a punching die showing an embodiment of the present invention.
FIG. 3 is a cross-sectional view of a main part of a punching die showing an embodiment of the present invention.
FIG. 4 is a perspective view showing a conventional die release.
FIG. 5 is a perspective view illustrating a state in which a conventional die is used.
FIG. 6 is a sectional partial explanatory view of a conventional die release.
FIG. 7 is a perspective view showing an example of a plastic molded sheet in which a large number of molded bodies are aligned and molded.
8 is a perspective view illustrating a state in which a molded body is cut from the plastic molded sheet illustrated in FIG. 7 to form the molded body.
[Explanation of symbols]
REFERENCE SIGNS LIST 1 punching die 2 punching blade 3 mounting plate 4 stud hole 5 resin plate 5a screw hole 6 substrate 8 screw

Claims (2)

A punching die structure for a punching machine, characterized in that one or more punching blades are fixedly mounted on a mounting plate, and the mounting plate is movably mounted to a substrate in a small range. The mounting plate is provided with a stupid hole having a diameter slightly larger than the diameter of the screw to be used, and the mounting plate has a diameter of the screw by inserting a screw into the stuck hole and screwing it to a resin plate provided on the substrate. 2. The die-cutting structure for a punching machine according to claim 1, wherein the die is mounted so as to be freely movable within a range of a larger diameter of the stupid hole.

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