JP2539783Y2 - Film punching equipment - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION [Industrial Application Field] The present invention relates to a film punching apparatus.

[Prior Art] In a film punching device, a product having a predetermined shape is punched from a film by an upper die and a lower die, the punched product is lifted together with the upper die, and the lifted product is dropped at a product removal position. There is something like that.

In such a conventional film punching apparatus, a product having a predetermined shape is punched out of a film with an upper die and a lower die, and at the same time, the punched product is fitted into a die hole of the upper die, and the fitting force is used. The punched product is held in the upper die, and the held product is dropped at the product removal position by the operation of the knockout mechanism. The knockout mechanism is a mechanism in which the product fitted into the die hole of the upper mold is protruded by the stripper pin and separated from the upper mold.

[Problem to be Solved by the Invention] However, in such a conventional film punching device, even if the knockout mechanism operates, only the product (film) fitted and held in the upper die hole is bent. There was a problem that sometimes did not fall.

This invention was made in view of the above circumstances,
An object of the present invention is to provide a film punching device capable of reliably dropping a product (film) held on an upper die.

[Means for Solving the Problem] In order to solve the above-mentioned problems, the film punching device of the present invention applies a negative pressure to the lower surface of the upper die to temporarily cut a product (film) punched on the lower surface. And a suction holding means for holding by suction.

[Operation] According to the film punching device of the present invention, by releasing the negative pressure state of the lower surface of the upper die by the suction holding means,
The holding power for the product held by being sucked to the lower surface of the upper mold can be eliminated instantaneously, so that the product held by the upper mold can be reliably dropped.

[Examples] Hereinafter, the present invention will be described in detail with reference to examples.

FIG. 1 shows a main part of a film punching apparatus according to an embodiment of the present invention.

This film punching device includes an upper die 1 and a lower die 2. The upper die 1 is provided with an upper die on the lower surface of the upper die body 11.
A stripper plate 15 is provided on a lower surface of the upper die body 11 in a die hole 13 of the upper die 12 through a plurality of bellows-like elastic members 14, and a punch formed on the stripper plate 15 is provided. The upper part of the punch 17 which is inserted into the insertion hole 16 so as to be movable up and down relatively is attached to the upper die body 11, and a plurality of intake ports formed in the stripper plate 15.
A structure 18 is connected to a vacuum pump (not shown) via an interior of the bellows-like elastic member 14, an intake path 19 formed in the upper die body 11, and a tube (not shown). In a normal state, the lower surface of the stripper plate 15 is formed by the upper die so that the bellows-like elastic member 14 extends to the maximum.
It is located a predetermined distance below the lower surface of 12 and the lower end surface of punch 17.

The lower die 2 has a die hole 13 of the upper die 12 on the upper surface of the base 21.
A lower die 22 is provided at a position facing the lower die.
A die hole 23 is formed at a position facing the punch 17 of 22,
A chip discharge hole 24 is formed in the base 21 below the die hole 23, and a film receiving base 26 is provided via a spring 25 on the upper surface of the base 21 around the lower die 22. In a normal state, the spring 25 extends to the maximum, so that the upper surface of the film receiving table 26 is located a predetermined distance above the upper surface of the lower die 22.

When a product having a predetermined shape is punched out of the film 3 placed on the film receiving table 26 by this film punching device, the upper die 1 first descends. Then, as shown in FIG. 2, the lower surface of the upper die 12 presses the upper surface of the film receiver 26 via the film 3, whereby the film receiver 26 descends against the force of the spring 25, Along with this, the lower die 22 relatively enters the die hole 13 of the upper die 12,
A product 31 having a predetermined outer shape is punched from the film 3.
Further, the lower surface of the stripper plate 15 abuts on the upper surface of the lower die 22 via the film 3, whereby the stripper plate 15 relatively rises against the elastic force of the bellows-like elastic member 14. Accordingly, the punch 17 enters the die hole 23 of the lower die 22, a hole having a predetermined shape is formed in the product 31, and the generated chip 32 is finally discharged through the chip discharge hole 24. You. Then, when the upper die 1 reaches the bottom dead center, the vacuum pump starts driving, the lower surface of the stripper plate 15 is set to a negative pressure, and the punched product 31 is sucked to the lower surface of the stripper plate 15.

Thereafter, when the upper mold 1 rises, as shown in FIG.
The product 31 sucked and held on the lower surface of the stripper plate 15 is lifted. In addition, since the bellows-like elastic member 14 extends to the maximum, the stripper plate 15
17, the lower surface of the stripper plate 15 returns to the normal state in which the lower surface of the stripper plate 15 is located a predetermined distance below the lower surface of the upper die 12 and the lower end surface of the punch 17, and the lower surface of the stripper plate 15 The product 31 sucked and held in the upper die 12 projects downward from the die hole 13 of the upper die 12.
In addition, the film tray 26 is returned to the original normal position by the spring 25 extending to the maximum.

Thereafter, the upper mold 1 reaching the top dead center is moved in the horizontal direction to be positioned at the product removal position, or the product removal member is positioned below the upper mold 1 reaching the top dead center, and then the vacuum pump Is stopped, the negative pressure state of the lower surface of the stripper plate 15 is released, whereby the holding force for the product 31 adsorbed and held on the lower surface of the stripper plate 15 is instantaneously lost, and the stripper plate 15 is held. The product 31 that has been dropped falls under its own weight.

As described above, in this film punching device, by releasing the negative pressure state of the lower surface of the stripper plate 15 by the vacuum pump, the holding force on the product 31 sucked and held on the lower surface of the stripper plate 15 is instantaneously. Since there can be none, the product 31 held on the stripper plate 15 can be reliably dropped. Further, in this film punching device, since it is only necessary to provide the intake path 19 in the upper die 1, the configuration of the upper die 1 can be simplified as compared with a case where a knockout mechanism is provided in the conventional upper die.

[Effects of the Invention] As described above, according to the film punching device of the invention, the lower surface of the upper die is released from the negative pressure state by the suction holding means, so that the lower surface of the upper die is sucked and held by the lower surface of the upper die. Since the holding force on the product can be completely eliminated instantaneously, the product held by the upper mold can be reliably dropped.

[Brief description of the drawings]

FIG. 1 is a longitudinal sectional view showing a main part of a film punching apparatus according to an embodiment of the present invention, FIG. 2 is a longitudinal sectional view showing a state where a film is punched by the film punching apparatus, and FIG. It is a longitudinal section showing the state where the product punched by the punching device was lifted. 1 ... upper mold, 2 ... lower mold, 3 ... film, 18 ... intake port, 19 ... intake path.

Claims (1)

(57) [Scope of request for utility model registration] An upper die and a lower die having a stripper plate punch out a product of a predetermined shape from a film, and a punch formed in the upper die and a die hole provided in the lower die. In a film punching apparatus for punching a hole in a product, lifting the punched product together with the upper mold, and dropping the lifted product at a product removal position, an intake port is provided on a lower surface of the stripper plate, An elastic member supporting the stripper plate and having an intake path provided therein is provided on the upper die, and the lower surface of the stripper plate is suctioned through the elastic member to make the lower surface of the stripper plate a negative pressure. A film punching device for temporarily absorbing and holding punched products.