# US 5,344,299 A · Resin material supply apparatus for resin press molding machine

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- Number: US 5,344,299 A
- Document ID: US5344299A
- Status: Granted
- Kind: A
- Application number: 07/863,733
- Filed: 1992-04-06
- Granted: 1994-09-06
- Earliest claimed: 1992-04-06
- Assignees: Kabushiki Kaisha Kobe Seiko Sho
- Inventors: Naoki Takeuchi
- Web page: https://patentgrep.com/patent/US5344299A

## CPC

- B29C 31/048: {the material being severed at the dispensing head exit, e.g. as ring, drop or gob, and transported immediately into the mould, e.g. by gravity}
- B29C 31/063: {of the piston type}
- B29C 48/06: Rod-shaped
- B29C 48/12: Articles with an irregular circumference when viewed in cross-section, e.g. window profiles
- B29C 48/475: using pistons, accumulators or press rams
- B29C 43/00: Compression moulding, i.e. applying external pressure to flow the moulding material; Apparatus therefor {(by liberation of internal stresses B29C61/006)}
- B29C 2043/3433: {using dispensing heads, e.g. extruders, placed over or apart from the moulds}
- B29C 2043/3444: {using pressurising feeding means located in the mould, e.g. plungers or pistons}
- B29C: SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING (making preforms B29B11/00; making laminated products by combining previously unconnected layers which become one product whose layers will remain together B32B37/00 - B32B41/00)

## Abstract

The present invention has a purpose to prevent leakage of resin material and disorder of cutting operation without increasing plate thickness of the cutter, thereby providing a resin material supply apparatus capable of suiting increase of resin material sheet size or higher back pressure. To this end, according to the present invention, there is provided a resin material supply apparatus and method for a resin press molding machine in which: resin material is extruded in a supply cylinder toward a die by a piston, and the molded resin material is cut by a cutter which slides along a front end surface of the die. Then, the cut resin material is supplied onto a metal mold, and new resin material is charged into the supply cylinder by pressing the cutter toward the die at a position that the cutter closes an opening of the die.

## Claims

### Claim 1

A resin material supply apparatus for a resin press molding machine comprising:
a supply cylinder including a piston for extruding resin material toward a metal mold;
a die having an opening for forming the resin material extruded from the supply cylinder;
a cutter device having a cutter cutting the molded resin material by sliding along a front end surface of the die;
a charger for charging resin material into the supply cylinder; and
a pressing device external of the supply cylinder for pressing the cutter toward the die when the cutter is at a position that the cutter closes the opening of the die.

### Claim 2 (depends on 1)

A resin material supply apparatus for a resin press molding machine in accordance with claim 1 in which said cutter moves in an up-and-down direction.

### Claim 3 (depends on 2)

A resin material supply apparatus for a resin press molding machine in accordance with claim 2 in which further comprising a cutter cylinder for sliding the cutter in the up-and-down direction.

### Claim 4 (depends on 1)

A resin material supply apparatus for a resin press molding machine in accordance with claim 1 in which said charge device supplying resin material is connected through an elbow to the supply cylinder, and includes a charge cylinder disposed in parallel with the supply cylinder and a piston accommodated in the charge cylinder.

### Claim 5 (depends on 1)

A resin material supply apparatus for a resin press molding machine in accordance with claim 1 in which said pressing device is constituted by a motor-driven screw mechanism.

### Claim 6 (depends on 1)

A resin material supply apparatus for a resin press molding machine in accordance with claim 1 in which said pressing device is constituted by a cam mechanism.

### Claim 7 (depends on 1)

A resin material supply apparatus for a resin press molding machine in accordance with claim 1 in which said pressing device is constituted by a pressing cylinder.

### Claim 8 (depends on 7)

A resin material supply apparatus for a resin press molding machine in accordance with claim 7 in which further comprising a cutter cylinder for sliding the cutter in an up-and-down direction.

### Claim 9 (depends on 8)

A resin material supply apparatus for a resin press molding machine in accordance with claim 8 in which said cutter cylinder and the pressing cylinder are connected to a switching valve, and a sequence valve is interposed between a bottom side of the pressing cylinder and the switching valve.