# US 2025/0050550 A1 · Demolding method and mold structure for extrusion molding

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- Number: US 2025/0050550 A1
- Document ID: US20250050550A1
- Status: Published application
- Kind: A1
- Application number: 18/538,500
- Filed: 2023-12-13
- Published: 2025-02-13
- Earliest claimed: 2023-08-11
- Inventors: JUNG CHI CHIANG
- Web page: https://patentgrep.com/patent/US20250050550A1

## CPC

- B29C 33/444: {for stripping articles from a mould core, e.g. using stripper plates}
- B30B 11/02: using a ram exerting pressure on the material in a moulding space
- B30B 15/32: Discharging presses
- 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)
- B30B: PRESSES IN GENERAL (producing ultra-high pressure or ultra-high pressure and high temperature to effect modifications of a substance, e.g. for making artificial diamonds B01J3/00 ){(compressing means for refuse receptacles B65F1/1405)}

## Abstract

A mold structure for extrusion molding contains: a first mold assembly, a second mold assembly, a mold plate, a first guide plate set, a second guide plate set, a first support plate set, and a second support plate set. The first mold assembly includes a punch head and a cylinder connector. The second mold assembly includes a receiving chamber configured to accommodate the punch head. The mold plate includes a discharge orifice and a contact face. The first guide plate set and a second guide plate set are fixed on the mold plate and are configured to lock with the second mold assembly. The first support plate set and the second support plate set are mounted on the mold plate, and tops of the first support plate set and the second support plate set are locked with the first guide plate set and the second guide plate set.

## Claims

### Claim 1

A mold structure for extrusion molding comprising:
a first mold assembly including a punch head formed on a first end of the first mold assembly, and the first mold assembly including a cylinder connector configured to reciprocately move upward and downward;
a second mold assembly including a receiving chamber defined therethrough and configured to accommodate the punch head;
a mold plate including a discharge orifice defined therethrough, a contact face formed on a bottom of the mold plate, wherein a top of the mold plate is connected with the second mold assembly, and the mold plate also includes a cylinder connector extending from an end thereof and configured to reciprocately move horizontally;
a first guide plate set and a second guide plate set fixed on two sides of the mold plate and are configured to lock with the second mold assembly;
a first support plate set and a second support plate set mounted on a bottom of the mold plate, wherein tops of the first support plate set and the second support plate set are locked with the first guide plate set and the second guide plate set;
wherein a slope is formed on an abutting face of the first support plate set, the second support plate set includes a slope formed on an abutting face thereof and configured to mate with the slope of the abutting face of the first support plate set, and the mold plate includes a slope formed on the contact face thereof and configured to mate with the slope of the abutting face of the first support plate.

### Claim 2 (depends on 1)

The mold structure for the extrusion molding as claimed in claim 1, wherein a slope between the abutting face of the first support plate set and the mold plate is within 3 degrees to 10 degrees, and a slope between the abutting face of the second support plate set and the mold plate is within 3 degrees to 10 degrees.

### Claim 3 (depends on 1)

The mold structure for the extrusion molding as claimed in claim 1 further comprising: a push sheet formed on the mold plate.

### Claim 4 (depends on 1)

A demolding method executed by the mold structure of claim 1 is capable of demolding by horizontally moving the mold plate back and forth and by using the discharge orifice.

### Claim 5 (depends on 3)

A demolding method executed by the mold structure of claim 3 is capable of pushing a finished product to demold by using the push sheet of the mold plate.