# US 10,118,319 B2 · Method for forming film

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- Number: US 10,118,319 B2
- Document ID: US10118319B2
- Status: Granted
- Kind: B2
- Application number: 15/854,710
- Filed: 2017-12-26
- Published: 2018-05-03
- Granted: 2018-11-06
- Earliest claimed: 2015-04-17
- Assignees: ScienBiziP Consulting(Shenzhen)Co., Ltd.
- Applicants: Scienbizip Consulting (Shenzhen) Co., Ltd.
- Inventors: Han-Lung Lee; Hung-Chun Ma; Yu-Lin Liao; Chih-Jung Chang
- Web page: https://patentgrep.com/patent/US10118319B2

## CPC

- B29C 35/0805: {using electromagnetic radiation}
- B29C 37/0032: {the coating being applied upon the mould surface before introducing the moulding compound, e.g. applying a gelcoat (B29C44/14 and B29C44/32 take precedence)}
- B29C 2033/0005: {with transparent parts, e.g. permitting visual inspection of the interior of the cavity}
- B29C 2035/0827: {using UV radiation}
- B29C 2037/0035: {the coating being applied as liquid, gel, paste or the like}
- B29K 2995/0027: for light outside the visible spectrum
- 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)
- B29K: INDEXING SCHEME ASSOCIATED WITH SUBCLASSES B29B, B29C OR B29D, RELATING TO MOULDING MATERIALS OR TO MATERIALS FOR {MOULDS, } REINFORCEMENTS, FILLERS OR PREFORMED PARTS, e.g. INSERTS

## Abstract

A mold assembly for forming a film includes a transparent bottom mold, a top mold, a case, and a lighting member. The transparent bottom mold defines a cavity for receiving a workpiece and a plurality of liquid compositions. The top mold is matched with the bottom mold to accommodate the workpiece between the bottom mold and the top mold. The case receives the bottom mold and the top mold placed therein. Air in the case is exhausted from the case to coat the plurality of liquid composition on the workpiece. The lighting member emits light on the liquid compositions to solidify the liquid compositions to form a film on the workpiece.

## Claims

### Claim 1

A method for forming a film, comprising:
disposing a liquid composition into a cavity of a transparent bottom mold;
placing a workpiece in the cavity;
matching a top mold with the bottom mold to accommodate the workpiece between the bottom mold and the top mold; the top mold comprises a top wall, a bottom wall, and a side wall connected between the top wall and the bottom wall, the bottom wall faces to the bottom mold; an air hole is defined in the top mold and extended from the side wall to the bottom wall;
receiving the bottom mold and the top mold placed in a case and exhausting air from the case to coat the plurality of liquid composition on the workpiece; and
solidifying the liquid composition to form a film on the workpiece by emitting light from a lighting member on the liquid composition.

### Claim 2 (depends on 1)

The method of claim 1, wherein a release layer is formed on an inner wall of the cavity.

### Claim 3 (depends on 1)

The method of claim 1, wherein the bottom mold comprises a top surface facing to the top mold, the top surface defines a positioning hole, and the top mold comprises a positioning pillar which is positioned in the positioning hole.

### Claim 4 (depends on 1)

The method of claim 1, wherein an elastic supporting member is elastically sandwiched between the bottom mold and the top mold.

### Claim 5 (depends on 4)

The method of claim 4, wherein bottom mold comprises a top surface facing to the top mold, the top surface defines a receiving hole, and the elastic supporting member is placed in the receiving hole.

### Claim 6 (depends on 1)

The method of claim 1, wherein a gap is defined between the workpiece and an inner wall of the cavity, and the air hole is aligned to the gap.

### Claim 7 (depends on 1)

The method of claim 1, wherein the case comprises a cover slidably mounted in the case and sealed with an inner side of the case.