JPH02165824A - Die assembly - Google Patents

Abstract

PURPOSE:To contrive a long service life of a die assembly by providing an elastic member for generating elastic force between a stripper and a die, and providing the elastic member in a holding hole of a holder so as to generate elastic force between the holder and a guide pin. CONSTITUTION:The die assembly is constituted of a fixed die 1 and a movable die 6. On a holder 8 of the movable die 6, a stripper 11 is provided through a guide pin 14. Subsequently, between the stripper 11 and the die 6, an elastic member 18 is provided so as to generate elastic force between the stripper 11 and the die 6. Also, on the holder 8, an elastic member 19 is provided in a holding hole 16 formed so as to communicate with a supporting hole 12 of the guide pin 14 so as to generate elastic force between the holder 8 and the guide pin 14. In such a way, initial elastic force per one piece of the elastic member can be made small.

Description

[Detailed Description of the Invention] [Object of the Invention (Industrial Application Field) The present invention relates to a mold device equipped with a stripper, and particularly relates to an improvement in the arrangement of an elastic member that biases the stripper. .

(Prior Art) For example, in a press die device, a stripper is generally provided on a movable die equipped with a punch, and the stripper is used to remove the metal plate stuck to the punch after punching, etc. . Such a stripper usually has a compression coil spring between it and a movable die, and the elastic force of the compression coil spring causes the metal plate to be removed from the punch.

(Problem to be Solved by the Invention) A plurality of compression coil springs are provided for biasing the stripper, but if a large stripper force is required, but the stripper is small, the arrangement space for the compression coil springs is It takes a lot of time to design to ensure this.

It is also possible to reduce the number of compression coil springs used by increasing the elastic force per compression coil spring, but in order to obtain a large stripper force with a limited number of compression coil springs, compression coil springs It is necessary to compress it greatly to increase the elastic force per piece. For this reason, the compression coil spring has to be used in an excessive stress range, resulting in a problem of shortened lifespan.

The present invention has been made in view of the above-mentioned circumstances, and its purpose is to provide a design that can increase the number of elastic members even if the stripper is small and also secure a space for arranging the elastic members. The objective is to provide a molding device that can perform this process on containers.

[Structure of the Invention] (Means for Solving the Problem) In order to achieve the above object, the mold device of the present invention consists of a fixed mold and a movable mold.
A stripper supported via a guide pin is provided on at least one mold holder, and an elastic member is provided between the stripper and the mold to generate an elastic force between the stripper and the mold, The holder is provided in a holding hole formed in the holder so as to communicate with the support hole of the guide pin so as to generate an elastic force between the holder and the guide pin.

(Function) According to the above means, since the elastic member is provided between the holder and the stripper and also provided in the holding hole of the holder,
Even if the stripper is small, many elastic members can be provided. Therefore, it is not necessary to increase the elastic force of each elastic member so much, resulting in a long life. Furthermore, since it can be placed within the holding hole of the holder, the design is such that a space is secured for the placement of the elastic member.

(Example) An embodiment of the present invention will be described below based on the drawings.

This embodiment is applied to a punching die of a press, and the fixed die 1 is a die die, which is constructed by fixing a die 5 having a die hole 4 to a holder 3 attached to the bed 2 of the press. ing.

On the other hand, the movable die 6 is a punch die, which is constructed by fixing a punch 10 to a holder 8 attached to a ram 7 of the press by a punch plate 9.

Of the fixed mold 1 and the movable mold 6, the movable mold 6 has a stripper 1 having a through hole 11a through which the punch 10 is inserted.
1 is provided. That is, in the holder 8 of the movable mold 6,
A plurality of support holes 12.13 (
Guide pins 14 and 15 are inserted into and supported in the support holes 12 and 13 so as to be movable up and down. A male thread 14 an 15 a formed at the lower end of the guide pin 14 , 15 is screwed onto the stripper 11 , thereby supporting the stripper 11 so as to face the punch plate 9 so as to be movable up and down. . The upper ends of these guide pins 14 and 15 have heads 14b and 15b, respectively.
are provided, and the heads 14a and 15a abut the bottom of a large diameter hole 16.17 formed in the holder 8 so as to communicate with the upper part of the support hole 12.13, thereby allowing the stripper 11 to move downward. The limit position of movement is regulated.

Incidentally, when the stripper 11 is at its downward movement limit position, the lower surface of the stripper 11 is located slightly lower than the lower surface of the punch 10.

Such a stripper 11 punches a hole in a metal plate material as described later, and then punches the metal plate bitten by the punch 10 by the elastic force of the first and YT52 compressed fill springs 18 and 19 as elastic members. This is for removing it from the punch 10. Both compression coil springs 18 and 19
Among them, the first compression coil spring 18 is compressed between the holder 8 and the stripper 11 so as to be wound around the lower part of the guide pin 14 protruding from the holder 8 .

In other words, it is provided in a state where it generates an elastic force.

The second compression coil spring 19 is housed in the large diameter hole 16 communicating with the support hole 12 of the guide pin 14 as a holding hole, and is screwed onto the upper end of the large diameter hole 16. It is provided in a compressed state by the plug 20, that is, in a state where an elastic force is generated.

Next, the operation of the above configuration will be explained.

First, in the state where the movable mold 6 is raised as shown in Fig. 1,
The metal plate material 21 is set on the die 5, and the ram 7 is lowered. Then, the stripper 11 first removes the metal plate 2.
1 and is pressed and fixed onto the die 5. In this state, the ram 7 and therefore the holder 8 further descend while compressing the first and second compression coil springs 18 and 19, as shown in FIG. The punch 10 further descends and punches a hole 22 in the metal plate 21 by cooperation with the die hole 4 of the die 5.

As a result of this punching, the periphery of the hole 22 in the metal plate material 21 is in a state where it is bitten by the punch 10, and although the ram 7 then rises, since the metal plate material 21 is pressed onto the die 5 by the stripper 11, the metal absorbent material The punch 10 is raised while the metal plate 21 is stopped, and the metal plate 21 is relatively removed from the punch 10.

According to the above configuration, the compression coil spring 18, which is an elastic member,
19 is disposed not only between the holder 8 and the stripper 11 but also inside the large diameter hole 16 formed in the holder 8, so that the stripper 11 is small and the space between the holder 8 and the stripper 11 is small. Even if space is limited, the arrangement of the compression coil springs 18 and 19 can be easily designed without taking much time in designing to secure the arrangement space for the compression coil springs 18 and 19.

Moreover, the total number of compression coil springs 18 and 19 is as follows:
Since twice the number of compression coil springs 18, 19 can be provided under the same conditions as in the past, the elastic force of each compression coil spring 18, 19 does not need to be so large. This means that the compression coil springs 18 and 19 do not have to be compressed so much initially, and the punch 10
Considering that the metal plate material 21 is further compressed when punched by the method, the life will be longer than that of the conventional method in which the amount of initial compression is large.

In the above embodiment, the first compression coil spring 18 is provided so as to be wound around the guide bin 14, but there is no particular need to do this, and the elastic member is not limited to a compression coil spring, but may be a rubber. It may be columnar or cylindrical.

In addition, although the above embodiment has been described as being applied to a punching die device of a press, the present invention is not limited to this, and the present invention is not limited to this, but the present invention is applicable to a drawing device, in which an elastic member for a stripper for extracting a product from a punch is arranged, or a die. The present invention may be applied to an arrangement of an elastic member for a stripper that extracts a squeezed product from a hole, and furthermore, an arrangement of an elastic member for a stripper that extracts a molded product from a mold in a plastic molding device. May be applied to

[Effects of the Invention] As is clear from the above description, according to the molding device of the present invention, even if the stripper is small, the design for securing the space for arranging the elastic member that biases the stripper can be applied to the container. In addition to being able to increase the number of elastic members, the initial cutting force per elastic member can be reduced, which has the excellent effect of prolonging the service life. be.

[Brief explanation of the drawing]

The drawings show one embodiment of the present invention, and FIG. 1 is a longitudinal sectional side view of the main part, and FIG. 2 is a view corresponding to FIG. 1 showing the state at the time of punching. In the figure, 1 is a fixed type, 5 is a die, 6 is a movable type, 8 is a holder, 10 is a punch, 11 is a stripper, 14 is a guide bin, 16 is a large diameter hole (holding hole), 18.19 is a first ．． Second
It is a compression coil spring (elastic member).

Claims (1)

[Claims] 1. A stripper consisting of a fixed type and a movable type, and a stripper supported via a guide pin on the holder of at least one of the fixed type and movable type, in which an elastic An elastic member is provided to generate an elastic force between the stripper and the mold, and an elastic member is provided in the holding hole formed in the holder so as to communicate with the support hole of the guide pin. A mold device characterized in that it is provided to generate force.