# US 7,744,363 B2 · Valve device of injection molding device

> Agents: this data is available as JSON from the patentgrep API and MCP server — see https://patentgrep.com/llms.txt

- Number: US 7,744,363 B2
- Document ID: US7744363B2
- Status: Granted
- Kind: B2
- Application number: 11/956,349
- Filed: 2007-12-14
- Published: 2008-10-09
- Granted: 2010-06-29
- Earliest claimed: 2007-04-06
- Assignees: Hon Hai Precision Industry Co., Ltd.
- Inventors: Chun-Yuan Chang
- Web page: https://patentgrep.com/patent/US7744363B2

## CPC

- B29C 45/1418: {the inserts being deformed or preformed, e.g. by the injection pressure}
- B29C 51/10: Forming by pressure difference, e.g. vacuum
- B29C 2045/14213: {deforming by gas or fluid pressure in the mould cavity}
- B29C 2791/001: Shaping in several steps
- 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

A valve device is configured for obturating an opening of a channel defined in an injection molding device. The valve device includes a plug movably received in the channel, and a resilient member connected with the plug. The plug includes an obturating portion for obturating the opening of the channel. The resilient member is configured for driving the plug to its original position where the obturating portion obturates the opening, after the opening of the channel is opened.

## Claims

### Claim 1

A valve device configured for obturating an opening of a channel defined in an injection molding device, comprising:
a plug movably received in the channel, the plug comprising an obturating portion for obturating the opening of the channel; and
a resilient member connected with the plug to drive the plug to its original position where the obturating portion obturates the opening, after the opening of the channel is opened;
wherein the channel is connected to a thermal medium source, thermal medium from the thermal medium source is capable of driving the plug to open the channel;
wherein the thermal medium is gas, an air discharging hole is defined in the mold for releasing the gas from the mold; and
wherein the gas is heated by an electric heater or an infrared ray heater.

### Claim 2 (depends on 1)

The valve device as claimed in claim 1, wherein the opening of the channel is a bell-mouthed recessed portion, the obturating portion is taper-shaped corresponding to the opening of the channel.

### Claim 3 (depends on 2)

The valve device as claimed in claim 2, wherein the plug further comprises a pole extending from a small end of the obturating portion, one end of the resilient member is connected to the pole of the plug.

### Claim 4 (depends on 3)

The valve device as claimed in claim 3, wherein the other end of the resilient member is connected to one end of the channel opposite to the opening.

### Claim 5 (depends on 2)

The valve device as claimed in claim 2, wherein the plug further comprises a pole extending from a small end of the obturating portion, a block protrudes into the channel from one end opposite to the recessed portion, a through hole is defined in the block, the pole extends through the through hole of the block, a fastening member is fixed to a distal end of the pole, the resilient member fits about the pole and is resiliently located between the block and the fastening member.

### Claim 6 (depends on 1)

The valve device as claimed in claim 1, wherein the resilient member is a spring.

### Claim 7 (depends on 3)

The valve device as claimed in claim 3, wherein the channel comprises a conduit for communicating with a small end of the recessed portion, a slender duct with one end communicating with the conduit and the other end connected to the thermal medium source.