# US 11,992,080 B2 · Manufacturing method of an injection molded integral multicolor thermoplastic elastometric foamed sole

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- Number: US 11,992,080 B2
- Document ID: US11992080B2
- Status: Granted
- Kind: B2
- Application number: 17/335,131
- Filed: 2021-06-01
- Published: 2021-12-09
- Granted: 2024-05-28
- Earliest claimed: 2020-06-06
- Assignees: Guangdong Angsi Advanced Materials Technologies Co., Ltd.
- Applicants: Guangdong Angsi Advanced Materials Technologies Co., Ltd.
- Inventors: Xubin Chen
- Web page: https://patentgrep.com/patent/US11992080B2

## CPC

- A43B 13/023: {Soles with several layers of the same material}
- A43B 1/0027: {made at least partially from a material having special colours}
- A43B 13/04: Plastics, rubber or vulcanised fibre
- B29C 45/14795: {Porous or permeable material, e.g. foam}
- B29C 45/14811: {Multilayered articles (B29C45/14827 takes precedence)}
- B29C 45/14819: {the inserts being completely encapsulated}
- B29C 45/1671: {with an insert}
- B29D 35/0009: {by injection moulding; Apparatus therefor}
- B29D 35/122: {Soles}
- B29D 35/142: {Soles}
- B29K 2105/0005: {containing compounding ingredients (releasing, lubricating or separating agents B29C33/56, fibers B29K2105/08, B29K2105/12; fillers B29K2105/16, recycled material B29K2105/26)}
- B29K 2105/04: cellular or porous
- B29L 2031/504: {Soles}
- A43B: CHARACTERISTIC FEATURES OF FOOTWEAR; PARTS OF FOOTWEAR
- 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)
- B29D: PRODUCING PARTICULAR ARTICLES FROM PLASTICS OR FROM SUBSTANCES IN A PLASTIC STATE (making granules B29B9/00; making preforms B29B11/00)
- 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
- B29L: INDEXING SCHEME ASSOCIATED WITH SUBCLASS B29C, RELATING TO PARTICULAR ARTICLES

## Abstract

An injection molded integral multicolor thermoplastic elastomeric foamed sole, comprising an integral sole made from thermoplastic elastomeric foaming bodies of at least two colors, and on surfaces thereof are provided grains of arbitrarily superposed injection strips; the foamed sole is made by: mixing, milling and heating thermoplastic elastomer raw materials of at least two colors, lubricants, and foaming auxiliaries to be thermoplastic elastomeric fused-masses, adding respectively gas-foaming agents at 0.2%-10% of thermoplastic elastomeric raw materials, compressive injecting gas-foaming agents respectively into thermoplastic elastomeric fused-masses, fully mixing to form thermoplastic elastomeric gas foamed polymers, and extruding foaming strips of thermoplastic elastomeric gas polymers of the at least two colors with an extrusion and injection process and/or co-extruding the foaming strips of thermoplastic elastomeric gas polymers of the at least two colors by a co-extrusion process into molds to form arbitrarily superposed strips, clamp molds, discharge gas and form.

## Claims

### Claim 1

A manufacturing method of an injection molded integral multicolor thermoplastic elastomeric foamed sole, wherein the foamed sole is of a shape of an integral sole made from thermoplastic elastomeric foaming bodies of at least two color classifications, and on surfaces of the thermoplastic elastomeric foaming bodies of the at least two color classifications are provided grains of a plurality of arbitrarily superposed injection strips; wherein the manufacturing method comprising following steps:
(S1): sending respectively thermoplastic elastomer raw materials of different color classifications, lubricants, and foaming auxiliaries to first milling machines of different color classifications, and milling the same in the first milling machines, forming thermoplastic elastomeric fused masses, in the meantime, adding gas foaming agents into the thermoplastic elastomeric fused masses in the first milling machines, maintain hot mixing and forming polymer-gas dispersoid systems;
(S2): sending polymer-gas dispersoid systems of different color classifications in S1 respectively to second milling machines of corresponding color classifications for cutting, cooling and pressurizing to form thermoplastic elastomeric gas foaming polymers, sending the thermoplastic elastomeric gas foaming polymers to injection molding machines of corresponding color classifications respectively, to have injection nozzles of the injection molding machines to extrude foaming strips of thermoplastic elastomeric gas polymers, and/or have the injection molding machines of at least two color classifications to supply a feeding port of a laminating machine and extrude the foaming strips of thermoplastic elastomeric gas polymers with at least one injection nozzle of the injection molding machines with co-extrusion technology; pouring quantitatively and simultaneously or sequentially the foaming strips of thermoplastic elastomeric gas polymers extruded by different injection nozzles of the injection molding machines into a female mold, and form a status of a plurality of arbitrarily superposed layers; and when pouring quantitatively into the female mold sequentially, temperature difference between the next foaming strips of the thermoplastic elastomeric gas polymers and last foaming strips of the thermoplastic elastomeric gas polymers shall be ±10° C.; and
(S3): after completing pouring of the foaming strips of thermoplastic elastomeric gas polymers of each of the different color classifications, matching the female mold and a male mold, discharge gas therein, and finalize to be the foamed sole.

### Claim 2 (depends on 1)

The manufacturing method of the injection molded integral multicolor thermoplastic elastomeric foamed sole according to claim 1, wherein the foaming strips of thermoplastic elastomeric gas polymers are consisted of one to seven colors; density of the foamed sole is 0.225-0.280 g/cm3, hardness 40-60 C, and resilience 48%-80%, the first milling machines are double screw extruders, and the second milling machines are single screw extruders.

### Claim 3 (depends on 1)

The manufacturing method of the injection molded integral multicolor thermoplastic elastomeric foamed sole according to claim 1, wherein the foaming strips of thermoplastic elastomeric gas polymers are consisted of one to seven colors; density of the foamed sole is 0.225-0.280 g/cm3, hardness 40-60 C, and resilience 48%-80%, wherein in an enclosed cavity formed between the male mold and the female mold, at least two housing cavities for different color classifications of the foamed sole are provided by providing dividing grooves and/or dividing edges and/or dividing protrusions and/or dividing recesses.

### Claim 4 (depends on 1)

The manufacturing method of the injection molded integral multicolor thermoplastic elastomeric foamed sole according to claim 1, wherein the foaming strips of thermoplastic elastomeric gas polymers are consisted of one to seven colors; density of the foamed sole is 0.225-0.280 g/cm3, hardness 40-60 C, and resilience 48%-80%, wherein in step (S2) and (S3), pouring of the foaming strips of thermoplastic elastomeric gas polymers of each of the different color classifications is done within 60 s.

### Claim 5 (depends on 1)

The manufacturing method of the injection molded integral multicolor thermoplastic elastomeric foamed sole according to claim 1, wherein the foaming strips of thermoplastic elastomeric gas polymers are consisted of one to seven colors; density of the foamed sole is 0.225-0.280 g/cm3, hardness 40-60 C, and resilience 48%-80%, wherein an area of openings of the injection nozzles of the injection machines is 0.5 mm2 to 100 mm2.