JPH10314874A - Fransfer press die - Google Patents

Abstract

PROBLEM TO BE SOLVED: To surely remove a scrap by forming a burr part to an outer peripheral edge part of a rear side surface without using a reversing device when trimming a plastic substance. SOLUTION: A plastic substance, in a trimming die S, is trimmed to a prescribed shaped product 23 by action of a lower knock out 4, a product guide/ upper knock out 5, a trimming punch 24 and a trimming die 25. At this time, a burr part is formed to an outer peripheral edge part of a rear side surface of the product 23. A scrap 27 accumulated to an outer periphery of the trimming punch 24 is cut by a scrap cutter 6 arranged to the trimming punch 24 and is slided down from an inclined face 6a of the scrap cutter 6 arranged to the trimming punch 24, the scrap is discharged from scrap discharge ports 11, 12 formed to a setting position of dies R, T and communicated to the slant face to the outside of the trimming die S.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a transfer press die having a plurality of processing dies for sequentially processing a plastic object, and a reversing device for trimming the plastic object with the trimming die. The present invention relates to a transfer press mold configured to form a burring portion on the outer peripheral end of the lower surface of a plastic object without using the same, and to remove scrap generated by trimming processing by simple means.

[0002]

2. Description of the Related Art Using a metal mold for trimming of a metal mold for a high-speed transfer press machine, a metal plate of a plastic object is formed from
2. Description of the Related Art There has been known a method of trimming and removing a large number of products having a predetermined shape at high speed. FIG. 5 is a cross-sectional view showing an example of a product formed into a predetermined shape by drawing using such a die. In the drawing, generally, 21 is the upper die punch side of the drawing die, 22 is the lower die side of the drawing die, and 23 is the drawn product. A plastic object is placed between the upper die punch side 21 and the lower die side 22, and a product 23 having a generally dish-like shape having a flange Y as shown in the figure is formed by the upper die and the lower die.

FIG. 6 is a cross-sectional view showing an example of the configuration of a conventional trimming mold. In the figure, 4 is 4-1
And a lower knockout composed of two members of 4-2 and
23 is a product formed by trimming a plastic object, 24 is a trimming punch, 25 is a trimming die,
26 is a product guide and 27 is a scrap. Circular plastic object is trimming punch 24, trimming die 25
The product 23 having the illustrated shape and having a generally Y-shaped flange portion Y is formed by the pressing force of the product guide 26.

[0004] A product 23 trimmed by a knockout 4-1 for applying a reverse pressing force from the lower mold side is projected from a trimming die 25. At this time, the product 23 placed on the trimming die 25 without completely protruding from the trimming die 25 is further protruded from the trimming die 25 by the knockout 4-2. When the product portion is punched out of the plastic object, the remaining portion is accumulated as scrap 27 on the outer periphery of the trimming punch 24. When a certain amount of scrap 27 is accumulated, it is removed from the trimming punch 24 and discharged to the outside of the trimming mold.

[0005] As described above, the scrap 27 is separated from the product portion of the plastic object during the trimming process and the scrap 27 is accumulated on the outer periphery of the trimming punch 24, so that it is necessary to remove the scrap 27. When the product 23 to be trimmed requires a plurality of processing bending steps, such as when the product 23 is a sealing plate for a coin-type battery, the trimmed product 23 needs to be transferred to the next process. However, the scrap cannot be removed by dropping the product 23 below the trimming die 25 and then removing the scrap 27. For this reason, the scrap 27 is removed from the trimming punch 24 while the trimmed product 23 remains at the trimmed position.
In order to remove it from the mold for trimming processing and to discharge it to the outside of the trimming mold, a measure is taken.

FIGS. 7A and 7B are views showing an example of the shape of a scrap 27 formed when trimming a plastic object. FIG. 7A is a plan view and FIG. )
Is a sectional view. In this example, as shown in the figure, the product is trimmed in a circular shape, so that the scrap 27 is formed in an annular shape.

For example, when a sealing plate as a part of a coin-type battery is formed by trimming as shown in FIG. 6, the coin-type battery is a consumable which is mass-produced. Costs are required to be reduced as much as possible. Therefore, the scrap 2 shown in FIG.
It is considered that the value of the width 27b of the scrap 7 is also set small. However, if the value of the width 27b of the scrap 27 is extremely reduced, the fitting force of the scrap 27 accumulated on the outer periphery of the trimming punch 24 becomes weak, and the scrap 27 27 may fall from the outer periphery of the trimming punch 24.

If the scrap 27 falls from the outer periphery of the trimming punch 24 during the trimming of the plastic object, the trimming mold may be damaged. The value of the width 27b of the scrap 27 is set to be somewhat large,
Scrap 2 accumulated on the outer periphery of the trimming punch 24
7 is considered to increase the fitting force.

When the scrap 27 is removed from the trimming punch 24 after trimming the product from the plastic object as shown in FIG. 6, the scrap 27 is accumulated on the outer periphery of the trimming punch 24 with a certain fitting force as described above. Therefore, the scrap 27 is cut by a cutter and separated from the trimming punch 24. Thereafter, the scrap 27 is discharged to the outside of the trimming mold, taking care not to drop from the trimming punch 24.

FIGS. 8 (a) and 8 (b) are sectional views of the shape of the distal end portion A of the flange portion Y of the product 23 formed by trimming as shown in FIG. FIG. 8B is an enlarged sectional view of the front end portion A of the flange portion Y in FIG.
It is. When manufacturing the product 23 by trimming, the trimming punch 24 is used for the upper die and the trimming die 25 is used for the lower die as shown in FIG. 6, so that the trimming punch 24 comes into contact when punching a plastic object. A shearing force acts on the distal end portion of the flange portion Y corresponding to the outer peripheral end portion of the upper surface, and as shown in an enlarged sectional view of a portion A in FIG. Is done. Also, a sag portion 23b is formed at the outer peripheral end of the lower surface opposite to the side where the burrs 23a are formed.

The product 23 obtained as described above may be used as a sealing plate for a coin-type battery. FIG.
FIG. 2 is a sectional view showing an example of a coin-type battery. In the figure, 51 is a coin-type battery, 52 is a positive electrode, 53 is a negative electrode, 5
4 is a separator, 55 is a sealing plate, 56 is a case, 57 is a gasket for maintaining airtightness, and 58 is an organic solvent as an electrolyte. As shown in FIG. 6, the sealing plate 55 is formed into a generally dish-shaped product 23 having a flange portion Y by trimming, and then subjected to further processing such as deformation processing and bending processing in the next step. Specifically, it has a shape having a folded portion at the end as shown in FIG.

FIG. 10 shows the coin-type battery 51 shown in FIG.
It is an expanded sectional view of the end part X of FIG. As shown in FIG.
The end 5 has a folded portion formed by bending, and is in surface contact with a gasket 57 provided to maintain airtightness. For this purpose, FIG.
As shown in FIG. 10B, when the burrs 23a are formed on the upper surface of the front end portion A of the flange portion Y, A in FIG.
The burrs 23a are formed in the portion, that is, the portion in surface contact with the gasket 57. When the sealing plate 55 and the gasket 57 are arranged in such a state that the burrs 23a are formed, caulking by the case 56 is performed in the next step. However, there is a problem that it may not be possible to maintain the data.

Therefore, the trimmed product 23
Is applied as a sealing plate for a coin-type battery, FIG.
As shown in the cross-sectional views of (a) and (b), the tip portion B of the flange portion Y of the product 23 has a burrs 23a,
The specification is specified so that the sag portion 23b is formed on the upper surface. As shown in FIG. 11B, the burrs 23a are formed on the lower surface of the front end portion B of the flange portion Y of the product 23, and this product 23 is used as a sealing plate 55 for a coin-type battery as shown in FIG. When applied, the burrs 23a are shown in FIG.
No. B, that is, a portion that comes into contact with the folded surface at the end of the sealing plate 55, and does not come into contact with the surface on which the gasket 57 is arranged. Therefore, gasket 57
Can be avoided by the burrs 23a.

FIG. 12 shows a trimming process for forming a flash 23a on the lower surface of the front end portion B of the flange portion Y of the product 23 formed by trimming as described with reference to FIG. It is sectional drawing which shows an example of a metal mold | die. In the figure, 23 is a trimmed product, 2
4 is a trimming punch, 25 is a trimming die, 27 is scrap accumulated on the outer periphery of the trimming punch 24,
28 is an upper knockout and 29 is a product guide and lower knockout.

After the plastic object is turned over by a reversing device (not shown), it is disposed between a trimming punch 24 and a trimming die 25 and punched out by the trimming punch 24 as shown in FIG. Further, a pressing force is applied by a product guide and lower knockout 29 to perform a trimming process. After the trimming process, the product also projects from the trimming die 25. If the product 23 remains on the trimming punch 24, the upper knockout 28
As a result, the projection is performed from the trimming punch 24. The scrap 27 is accumulated around the trimming punch 24,
When a certain amount is accumulated, it is removed from the trimming punch 24 and sequentially discharged to the outside of the trimming mold.

In the case of the trimming die shown in FIG. 12, since the trimming punch 24 is punched out while being in contact with the upper surface of the outer peripheral end of the inverted plastic object, the plasticity of the trimming punch 24 is reduced. When the contact surface with the object, that is, the trimmed product 23 as shown in FIGS. 11A and 11B is arranged in a normal state,
The burrs 23 a are formed at the outer peripheral end of the lower surface of the product 23, and the sag 23 b is formed at the outer peripheral end of the upper surface that is in contact with the product guide and lower knockout 29.

[0017]

When a product of a predetermined shape is formed by trimming and the specification of the product is such that a flash portion is formed on the lower surface of the leading end portion, as shown in FIG. There has been a problem that a device for inverting the plastic object at the time of trimming processing requires a high cost. In addition, in the process of continuous production, when the reversing process of the plastic object is performed, there is a problem that extra processing time is required correspondingly and the productivity is deteriorated.

The present invention has been made in view of such a problem, and when trimming a plastic object with a trimming mold, the outer peripheral end of the lower surface is used without using a device for inverting the plastic object. It is another object of the present invention to provide a transfer press die configured to form a burring portion on a sheet and discharge a scrap generated during trimming processing to the outside of the trimming die by a simple mechanism.

[0019]

SUMMARY OF THE INVENTION An object of the present invention is to provide a transfer press die for sequentially processing a plastic object by a plurality of steps of a processing die including a trimming die. The lower die is composed of a lower knockout and a trimming punch, and the upper die is composed of a product guide and an upper knockout and a trimming die.The outer peripheral edge of the lower surface of the trimmed plastic object A scrap cutter having a slanted surface for forming a burring portion at the portion, cutting the scrap accumulated on the outer periphery of the trimming punch at the time of trimming at both front and rear ends, guiding the cut scrap, and dropping the scrap; A scrap outlet communicating with each inclined surface of the cutter is provided, and the scrap outlet is connected to the plastic object. It is accomplished by a structure arranged in the installation position of the mold adjacent to the trimming die in the right and left sides with respect to feeding direction step.

According to the above feature of the present invention, when trimming a plastic object with a trimming die for a transfer press machine, the outer peripheral edge of the lower surface of the plastic object without using a reversing device. The burrs can be formed in the portions, and the scrap generated by the trimming can be reliably discharged to the outside of the trimming mold.

[0021]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment of a transfer press die according to the present invention will be described below with reference to a partial sectional view of FIG. FIG. 1 is a partially enlarged view of a transfer press die in which a plurality of processing dies whose overall configuration is shown in FIG. The plastic object is transported in the direction of arrow Z. The trimming is performed by the trimming mold S, and the dies R and T adjacent to the left and right of the trimming mold S with respect to the transfer direction Z of the plastic object are installed as an idle process. At T, no processing is performed, and the space is set as an installation space for a drop position of scrap generated when trimming is performed by the trimming die S. In this case, except for the upper mold, one production block is formed by the dies R, S, and T for three processes.
The sub-die set method is adopted for this one production block and the upper die S.

In FIG. 1, the upper die set 1 includes a shank holder 2, a free shank 3, a product guide and upper knockout 5, and a trimming die 25.
The lower die set 10 includes a lower knockout 4, a scrap cutter 6, a die holder 8, a die holder key 9, scrap outlets 11 and 12, and a trimming punch 2.
4 are arranged.

FIG. 2A is a plan view of the scrap cutter 6, FIG. 2B is a front view of the scrap cutter 6, and FIG.
(C) is a side view of the scrap cutter 6. In the figure, 6b and 6c are cutting edges of the scrap cutter 6, and 6d is a hollow hole through which the trimming punch 24 passes. The scrap cutter 6 is provided with a trimming punch 2 by cutting edges 6b and 6c.
4 are cut at both front and rear ends (front and rear ends of the drawing in a direction perpendicular to the direction of transport of the plastic object). The scrap cutter 6 is provided with an inclined surface 6 a for sending the cut scrap 27 to the discharge ports 11 and 12. Also, in order to discharge the scrap 27 from the die holder 8, one end is removed by an oblique cutting line 8a having an angle of about 45 degrees to form a space 8b.

Since the lower die set 10 has such a special configuration, a standard die holder cannot be used, and the specially shaped die holder 8 is attached to the die holder key 9 and positioned. The trimming punch 24 fixing the scrap cutter 6 is configured to be directly attached to the die holder key 9. In the molds R and T, the product 23 is placed on the die holder 8 to which the urethane rubber 7 is attached.

FIG. 3 is a sectional view of a portion to be trimmed in the trimming mold S of FIG. The plastic object conveyed from the direction of the mold A is not inverted, and the trimming punch 24 and the trimming die 2
5 and is punched out by a trimming punch 24. The lower knockout 4 and the product guide and upper knockout 5 allow the plastic object to be trimmed by the trimming punch 2.
4 and the trimming die 25. In this case, the arrangement of the upper mold and the lower mold in the trimming process is shown in FIG.
In the example of FIG. 3, a flash portion is formed on the contact surface of the trimming punch 24 with the flange portion of the product, that is, the outer peripheral end of the lower surface of the flange portion Y in the example of FIG.

Next, when the scrap 27 is accumulated to a certain height on the outer periphery of the trimming punch 24, the scrap cutter 6 arranged on the trimming punch 24 cuts the scrap 27 in the front-rear direction. The cut scrap 27 slides down the inclined surface 6a of the scrap cutter 6, and communicates with the inclined surface 6a to pass through the scrap discharge ports 11 and 12 provided at the positions where the dies R and T are disposed, thereby trimming the trimming metal. It is discharged outside the mold S.

FIG. 4 is an explanatory view of an embodiment of a transfer press die according to the present invention. 4A is a front view, and FIG. 4B is a side view taken along the line AA ′ of FIG. 4A. Along the transfer direction Z of the plastic object, there are provided 11 molds a to k. In the drawing, 1 is an upper die set, 10 is a lower die set, 13 is a finger slide bar, 14 is a press bed, 15 is a sub die set for a trimming process, 16
Is a press ram. Fingers are attached to the finger slide bar 13, but in order to make it easier to see the entire configuration of the transfer press die, FIG.
In the figure, illustration is omitted.

The dies e, f, and g are the dies R, S, T shown in FIG.
The die holder part of the mold f for trimming and the lower die holder part of the molds e and g on the left and right sides of the mold f are removed from the normal die holder to form an integral body, and trimming is performed. 4 with the upper mold f
Trimming step sub die set 15 as shown in FIG.
It is arranged as. With such a configuration using the sub die set 15 and the free shank 3, it is possible to easily perform the mold matching of the trimming mold.

According to the present invention, an existing transfer press die for manufacturing a special transfer press for meeting a special specification of forming a burring portion at an end of a lower surface of a product to be trimmed is manufactured. This is dealt with by replacing some of the press dies. For this reason,
The cost can be greatly reduced as compared with a case where a new transfer press die is manufactured.

Further, in the present invention, the scrap generated by the trimming process is discharged to the outside of the trimming die by utilizing a part of the installation space of the processing die for the transfer press die. For this reason, a space for removing the scrap is taken up by two processing dies adjacent to the die for performing the trimming process, so that these dies cannot process the product. From the viewpoint of mass production, since the reversal process of the plastic object is not required, the processing time can be reduced.

It should be noted that the scrap discharging mechanism of the present invention does not increase the set intervals of the processing dies of the existing transfer press dies, but leaves the set intervals of the respective dies as they are in the lower mold portion. An outlet is provided. For this reason, the scrap generated by the trimming can be discharged to the outside of the trimming mold without reducing the transfer speed of the plastic object processed by the transfer press mold between the molds.

Further, the scrap accumulated on the outer periphery of the trimming punch is cut by the scrap cutter, and then travels along the inclined surface of the cutter toward the installation position of the mold adjacent to both sides of the trimming mold. Since the scrap is dropped down and removed through the formed outlet, the scrap can be reliably discharged to the outside of the trimming mold.

[0033]

As described above, in the transfer press die according to the present invention, the die for trimming comprises a lower die having a lower knockout and a trimming punch, and an upper die having a product guide / upper knockout and a trimming die. It consists of. For this reason, when trimming a plastic object into a predetermined shape, a flash portion is formed on the contact surface between the plastic object and the trimming punch, that is, on the outer peripheral end portion serving as the lower surface of the trimmed product. At this time, since the device to invert the plastic object is not used,
Production costs are reduced. Further, since the time for inverting the plastic object is not required, the manufacturing time can be shortened.

Further, scraps accumulated on the outer periphery of the trimming punch at the time of trimming are cut at both front and rear ends,
A scrap cutter having an inclined surface for guiding and dropping the cut scrap, and a scrap discharge port communicating with the inclined surface of the scrap cutter are provided, and the scrap discharge port is provided on the left and right sides of a trimming mold. Since it is arranged at the installation position of the mold adjacent on both sides, the scrap accumulated on the outer periphery of the trimming punch is reliably discharged to the outside of the trimming mold.

[Brief description of the drawings]

FIG. 1 is a partial sectional view showing an example of an embodiment of a transfer press die according to the present invention.

FIG. 2A is a plan view of a scrap cutter. (B) It is a front view of a scrap cutter. (C) It is a side view of a scrap cutter.

FIG. 3 is a cross-sectional view showing an example of an embodiment of a trimming mold according to the present invention.

FIG. 4A is a front view of a transfer press die according to an embodiment of the present invention. (B) It is AA 'side view of FIG.4 (a).

FIG. 5 is a sectional view of a drawn product.

FIG. 6 is a cross-sectional view of a conventional trimming mold.

FIG. 7A is a plan view of a scrap shape. (B) It is sectional drawing of a scrap shape.

FIG. 8A is a cross-sectional view of a product formed by a conventional trimming process. (B) It is an A section expanded sectional view of FIG. 8 (a).

FIG. 9 is a sectional view of a coin-type battery.

FIG. 10 is an enlarged sectional view of a part X in FIG. 9;

FIG. 11A is a cross-sectional view of a product formed by the trimming process of the present invention. FIG. 12 (b) is an enlarged sectional view of a portion B in FIG. 11 (a).

FIG. 12 is a cross-sectional view of a mold for performing a trimming process by inverting a raw material object.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Upper die set 2 Shank holder 3 Free shank 4 Lower knockout 5 Product guide and upper knockout 6 Scrap cutter 7 Urethane rubber 8 Die holder 9 Die holder key 10 Lower die set 11, 12 Scrap outlet 13 Finger slide bar 14 Press bed 15 Trimming process sub die set 16 Press machine ram 23 Product 24 Trimming punch 25 Trimming die 26 Product guide 27 Scrap

──────────────────────────────────────────────────の Continued on the front page (51) Int.Cl. ⁶ Identification code FI B21D 28/14 B21D 28/14 F // H01M 2/02 H01M 2/02 J

Claims (1)

[Claims] 1. A transfer press die for sequentially processing a plastic object by a multi-step processing die including a trimming die, wherein the trimming die comprises a lower knockout and a trimming punch. The upper die is composed of a product guide and an upper knockout and a trimming die to form a burring portion on the outer peripheral edge of the lower surface of the trimmed plastic object, and is integrated on the outer circumference of the trimming punch during the trimming process. A scrap cutter having an inclined surface for cutting the scrap at both front and rear ends and guiding and dropping the cut scrap, and a scrap discharge port communicating with each inclined surface of the scrap cutter are provided. Set the exit at the installation position of the mold adjacent to the trimming mold on both the left and right sides with respect to the transfer direction of the plastic object. A transfer press mold characterized by being placed in a place.