JPH0526570B2 - - Google Patents

Description

[Detailed description of the invention]

TECHNICAL FIELD The present invention relates to a press mold, and more particularly to a press mold using a rubber material for the lower mold. Technical background It has long been known to utilize the elasticity of rubber and use rubber as either a punch or die to perform various processing of sheet metal, etc. '' introduces that since no impact force is applied to the mating mold, inexpensive mold materials can be used, and the mold structure and installation are simple. By the way, this type of press that has been known in the past has not taken deep drawing into consideration. Purpose of the invention The purpose of the present invention is to use rubber for the lower mold, and to
It is an object of the present invention to provide a press die that enables deep drawing by incorporating a dicing mechanism. Summary of the Invention The present invention provides an upper mold having a piston formed in the middle of the upper mold plate, an upper ring body including a cylinder that fits on the outer periphery of the upper mold and can supply fluid pressure above and below the piston, and the upper ring A lower ring body corresponding to the body, a cushion part housed in the lower ring body, a seat slid on the lower ring body on the outside of the cushion part, and rubber filled in the upper part of the cushion part and the catch seat. In this mold, the upper plate is mounted on a slide, the lower ring body is mounted on a bolster, and material is sandwiched between the upper ring body and the lower ring body to perform press molding. Embodiment The drawing shows a press mold, and both slides and bolsters are omitted. An upper mold 2 is attached to the lower surface of the upper mold plate 1, and the upper mold plate 1
is fixed to the slide. The upper mold 2
A piston 3 is formed in the middle, and the piston 3 is housed in a cylinder 4 fitted to the outer periphery of the upper die 2. Furthermore, the cylinder 4 has an air supply path for alternately pressing both sides of the piston 3. 5 and 6 are provided to supply air pressure to the upper chamber 4a and lower chamber 4b of the cylinder 4. The cylinder 4 is formed with an upper ring body 7 that reaches beyond the molding part 2a of the upper mold 2, and a guide ring 8 is provided at the tip edge. Reference numeral 9 denotes a lower ring body for attaching the lower mold, and a flange 10 for attaching a bolster is provided at the lower end, and the upper end corresponds to the upper ring body 7. A through hole 11 is provided at the center of the lower end of the lower ring body 9, and a cushion part 12 is inserted into the lower ring body 9 through the through hole 11.
is inserted and joined to the lower plate 13 of the cushion part 12, and the receiving seat 14 of the lower ring body 9 slides.
is accommodated. On the inside of the lower ring body 9, a rubber 15 is installed on the upper part of the cushion part 12 and the catch seat 14.
is filled. The right half of the drawing shows the state immediately before processing with the material m sandwiched between the lower ring 9 and the upper ring 7.
The left half represents the completion of processing. While the slide is at the top dead center and descending toward the bottom dead center for molding, air pressure is supplied from the air supply path 6 of the cylinder 4 to the cylinder lower chamber 4b, and the slide is in the state shown on the right side of the drawing. descend. In the example, the rubber used as the lower mold is silicone rubber with zero hardness, and the material m held between the upper ring body 7 and the lower ring body 9 is moved downward by the slide to resist the pressure in the lower chamber 4b. and lower the upper mold 2. or,
As the upper die 2 descends, the cushion part 12 also descends against the pressure of the die cutter, and when the slide descends by a predetermined stroke and reaches the state shown on the left side of the drawing, the material is molded into a product M that conforms to the shape of the upper die. Processed. The rubber 15 receives a compressive load during the molding process, but the volume of the upper mold 2 is accommodated by the cushion part 12 and seat 14 that descend simultaneously with the lowering of the upper mold 2, and the volume of the material m is accommodated. The cushion pad 12 is lowered and absorbed. Cushion patch 1
The lower plate 13 of No. 2 serves to receive the pressure of the dictation with a small surface when high pressure is required just before the bottom dead center. Further, the pressure of the dictation may be normal pressure. When the slide passes the bottom dead center and ascends, air pressure is supplied to the cylinder 4 from the upper air supply path 5 to supply pressure in the cylinder upper chamber 4a and take out the product from the upper die 2. Note that the material that can be molded in the present invention may be either a resin plate or a metal plate and can be processed in warm or hot conditions. Processing conditions depending on the type of resin are as follows.

[Table] Effects of the Invention The present invention has the effect that deep drawing is possible with a mold using rubber, and can be applied to both resin plates and metal plates.

[Brief explanation of drawings]

The drawing is a front center sectional view of the assembled mold of the present invention, with the right side from the center line showing the state immediately before processing, and the left side showing the state at the end of processing. DESCRIPTION OF SYMBOLS 1... Upper die plate, 2... Upper die, 2a... Molding part, 3... Piston, 4... Cylinder, 4a...
...Cylinder upper chamber, 4b...Cylinder lower chamber, 5, 6
...Air supply path, 7...Upper ring, 8...Guide ring, 9...Lower ring, 10...Flange, 11...
...Through hole, 12...Cushion part, 13...Lower plate, 14...Catch, 15...Rubber.

Claims (1)

[Claims] 1. An upper mold provided on an upper mold plate and having a piston formed in the middle; an upper ring body including a cylinder that fits on the outer periphery of the upper mold and can supply fluid pressure above and below the piston; and a lower ring corresponding to the upper ring body. a cushion part housed in the lower ring body, a seat slid on the lower ring body on the outside of the cushion part, and rubber filled in the upper part of the cushion part and the seat; A press mold characterized by attaching a lower ring to a bolster on a slide.