JPH06102319B2 - Film punching mold - Google Patents

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a film punching die for punching a tape automatic bonding film which is used for electronic equipment and the like on which a semiconductor is mounted and bonded.

[0002]

2. Description of the Related Art Generally, as shown in Japanese Utility Model Laid-Open No. 1-143389, a work piece is inserted through a female die having a concave blade portion called a die plate, and a convex blade called a punch plate is inserted from above. A method is adopted in which the male die equipped with the parts descends and the workpiece is punched out by the two blades.In that case, the jig plate for fixing the workpiece called the stripper plate descends first before the male die. The work piece is fixed and then punched.

[0003]

The problems to be solved are as follows:
In the above-mentioned conventional technique, the male die and the jig plate are separate bodies, and the convex blade portion fits into the concave blade portion through the jig plate. In addition, the jig plate has a drawback of being complicated, and since the work piece contact surface of the jig plate is made of metal, when dust or the like adheres to the work piece, dent marks are generated on the film surface, which is a cause of poor quality.

[0004]

SUMMARY OF THE INVENTION According to the present invention, a male mold having a convex blade and a female mold having a concave blade form a pair, and a film inserted between both molds when the two molds are close to each other. In the punching die to be punched out, a guide pin having a height exceeding the convex blade portion is fitted on the male die side into a sprocket engaging hole for film feeding formed on the film at the time of the proximity. In addition, an elastic member having a thickness higher than the convex blade portion and lower than the guide pin is disposed avoiding the convex blade portion, and the guide pin has a thin tip end side and a root side. The parallel part is formed on the base plate, and the thickness of the parallel part is set higher than the thickness of the elastic member.

[0005]

According to the present invention, when the female die approaches the male die, the guide pin is first fitted into the sprocket engaging hole to position the film. Next, the elastic member contacts the film and fixes the film. Further, the two molds move closer to each other, and the film portion sandwiched between the concave blade portion and the convex blade portion is punched out.

[0006]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS FIG. 1 is a view showing the whole film punching die of the present invention, in which a lower base 21 and an upper base 22 are arranged relative to each other by a guide column 23 called a post. The position is secured. A male die 1 is provided on the lower surface side of the upper base 22 and a female die 2 is provided on the upper surface side of the lower base 21. When a force in the direction of arrow F acts, the upper base 2 is placed.
2 moves down against the elasticity of the spring 24 together with the male die 1, and returns to the position shown in the figure when the force is released.

In FIG. 2 showing a cross section in the direction of the arrow EE in FIG. 1, when the male die 1 and the female die 2 are separated from each other, they are at the positions shown, but when they are close to each other, the convex blade portion 3 of the male die 1 is the female die Fit into the concave blade 4.

A film guide 7 is provided on the upper surface 5 of the female mold 2 to prevent the film 6 from meandering and rising. As is apparent from FIG. 3, the film 6 is provided with square sprocket engaging holes 8 into which two sprocket films (not shown) are engaged in two rows in the length direction.

A guide pin 9 that fits into a sprocket engaging hole 8 of a film 6 is planted in the male die 1 whose upper surface is fixed to the back plate 15, and the guide pin 9 has a tip 1 thereof.
0 is processed into a conical shape, and has a cross-sectional shape slightly smaller than the sprocket engaging hole 8 on the root side thereof, and a parallel portion 11 which is processed in parallel and whose outer shape does not change in thickness is extended.

The elastic member 12 is a sheet-like sponge whose upper surface is attached to the lower surface of the male mold 1 by means such as adhesion, and is made of rubber such as urethane, neoprene, and hypalon, or a soft resin, and has resilience. It is subjected to independent foaming or open-cell treatment to give it. Further, the thickness B of the elastic member 12 is set to be larger than the height C of the convex blade portion 3 and smaller than the height D of the parallel portion 11 of the guide pin 9, and the film guide 7 is provided for the elastic member 12 and the male die 1. Penetration hole 1
Holes 16 are formed to avoid 3, 14 and the convex blade portion 3.

Next, the operation at the time of punching will be described. First, the film 6 is fed by a predetermined distance by a film feeding device (not shown) and stopped. Then the back plate 15
The male die 1 integrated with the lower part is lowered together with the elastic member 12, and the tip 10 of the guide pin 9 first fits into the sprocket engaging hole 8 of the film 6 to correct the stop position of the film 6 and position it by the parallel portion 11. After completion, the lower surface of the elastic member 12 presses and fixes the upper surface of the film 6. Film 6 at this time
Even if dust or the like adheres to the upper and lower surfaces of the elastic member 12 or the lower surface of the elastic member 12, the surface of the elastic member 12 bends, thereby preventing the inconvenience of producing dent marks due to dust on the film 6.

Subsequently, the film 6 is punched by the convex blade portion 3 and the concave blade portion 4. After punching, the male mold starts to rise, and first the convex blade portion 3 separates from the film 6,
Next, the fixing of the film 6 by the elastic member 12 is released,
Further, subsequently, the positioning of the film 6 is released by the guide pin 9, and the feeding operation of the film 6 is started.

Although the embodiment has been described above, the present invention is not limited to this embodiment. For example, even if the positional relationship between the male mold 1 and the female mold 2 is upside down, or even if the film 6 is rotated 90 degrees from the state of FIG. The present invention is also effective, and the cross-sectional shape of the parallel portion 11 of the guide pin 9 does not have to be the same as the shape of the sprocket engaging hole 8 as long as the film 6 can be positioned.
For example, it may be circular. Further, the elastic member 12 does not necessarily have to be in the form of a sheet, but may have a large number of protrusions or a ring-shaped member that surrounds the convex blade portion 3 as long as it is arranged at a position surrounding the convex blade portion 3 to provide elasticity. Instead of the sponge method using bubbles as a method, the bending characteristic of the material itself may be used. Further, in addition to the rectangular punching as in the present embodiment, many slit-shaped punching and punching combined with other shapes can be effectively used.

[0014]

As described in detail above, the film punching die of the present invention uses a male die 1 instead of a metallic film fixing jig which is called a conventional stripper plate and is movable with respect to the male die. It is engaged and is higher than the convex blade 3 and has a guide pin 9
Since the elastic member 12 having a thickness lower than that of the parallel portion 11 is adopted, it is possible to drastically reduce the processing points and the number of parts of the device itself, and the structure is simplified, so that it can be manufactured at low cost and the delivery time can be shortened. . In addition, the film 6 and the elastic member 12
Even if dust is attached, the film 6 does not have a dent mark,
It is possible to prevent the generation of defective products.

[Brief description of drawings]

FIG. 1 is a diagram showing an entire film punching die that is an embodiment of the present invention.

FIG. 2 is a view showing a cross section in the direction of arrow EE in FIG.

FIG. 3 is a diagram showing a cross section in the direction of arrow AA in FIG.

[Explanation of Codes] 1 Male type 2 Female type 3 Convex blade part 4 Concave blade part 6 Film 7 Film guide 8 Sprocket engaging hole 9 Guide pin 11 Parallel part 12 Elastic member 15 Back plate 21 Lower base 22 Upper base 23 Guide post 24 Spring

Claims (2)

[Claims] 1. A punching die in which a male die having a convex blade portion and a female die having a concave blade portion form a pair, and a film inserted between both die is punched out when the two die are close to each other. On the male die side, a guide pin fitted to a sprocket engaging hole for film feeding formed in the film at the time of the proximity and having a height exceeding the convex blade portion is planted, and the convex blade A film punching die, wherein an elastic member having a thickness higher than that of the guide pin and lower than that of the guide pin is disposed so as to avoid the convex blade portion. 2. The guide pin is characterized in that the tip side is formed thin and a parallel portion is formed on the root side, and the height of the parallel portion is made higher than the thickness of the elastic member. Film punching die described.