# US 10,870,266 B2 · Equipment and method of making substrate of plastic flooring

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- Number: US 10,870,266 B2
- Document ID: US10870266B2
- Status: Granted
- Kind: B2
- Application number: 15/871,154
- Filed: 2018-01-15
- Published: 2019-03-07
- Granted: 2020-12-22
- Earliest claimed: 2017-09-01
- Applicants: Zhao Pei Don; Lu Ding Yi
- Inventors: Zhao Pei Don; Lu Ding Yi
- Web page: https://patentgrep.com/patent/US10870266B2

## CPC

- B32B 41/00: Arrangements for controlling or monitoring lamination processes; Safety arrangements
- B29C 43/28: incorporating preformed parts or layers, e.g. compression moulding around inserts or for coating articles
- B29C 44/20: for articles of indefinite length
- B29C 44/24: Making multilayered articles
- B29C 44/5681: {Covering the foamed object with, e.g. a lining}
- B29C 44/569: {Shaping and joining components with different densities or hardness}
- B29C 48/08: flexible, e.g. films
- B29C 48/21: the layers being joined at their surfaces
- B29C 48/92: Measuring, controlling or regulating
- B32B 5/20: foamed in situ
- B32B 5/32: {at least two} layers being foamed {and next to each other}
- B32B 27/065: {of foam}
- B32B 27/08: of synthetic resin
- B32B 27/304: {comprising vinyl halide (co)polymers, e.g. PVC, PVDC, PVF, PVDF}
- B32B 37/04: characterised by the partial melting of at least one layer
- B32B 37/1054: {Regulating the dimensions of the laminate, e.g. by adjusting the nip or platen gap}
- B32B 37/153: {at least one layer is extruded and immediately laminated while in semi-molten state}
- B29C 43/46: Rollers
- B29C 43/52: Heating or cooling
- B29C 44/30: Expanding the moulding material between endless belts or rollers {(B29C44/203 takes precedence)}
- B29C 44/505: {extruding the compound through a flat die (in general B29C48/03)}
- B29C 2948/92647: Thickness
- B29K 2023/06: {PE, i.e. polyethylene}
- B29K 2027/06: PVC, i.e. polyvinylchloride
- B29K 2105/04: cellular or porous
- B29L 2009/00: Layered products
- B29L 2031/3017: {Floor coverings}
- B29L 2031/732: {Floor coverings (piles carpets B29L2031/7652; for vehicles B29L2031/3017)}
- B32B 2037/0092: {in which absence of adhesives is explicitly presented as an advantage}
- B32B 2266/0235: Vinyl halide, e.g. PVC, PVDC, PVF, PVDF
- B32B 2471/00: Floor coverings (B32B2419/04 takes precedence)
- B32B: LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
- 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
- B29L: INDEXING SCHEME ASSOCIATED WITH SUBCLASS B29C, RELATING TO PARTICULAR ARTICLES

## Abstract

Equipment of making a substrate of plastic flooring contains: an extrusion unit, a thickness regulating unit, and a rolling apparatus. The extrusion unit includes an outlet, and the thickness regulating unit including an inlet, a channel, and a cooler. The rolling apparatus includes a first roller, a second roller, and a press roller. The press roller at least includes a contacting roller and a pressing roller, wherein the contacting roller is configured to roll a foaming sheet, a printing layer, and an abrasion resistant layer. Furthermore, a heating unit heats the foaming sheet, the printing layer, and the abrasion resistant layer so that the foaming sheet, the printing layer, and the abrasion resistant layer are connected by using the pressing roller.

## Claims

### Claim 1

Equipment of making a substrate of plastic flooring comprising:
an extrusion unit being beside the equipment and including an outlet defined on one end of the extrusion unit so that after foam molding plastic material, the plastic material is extrusion molded out of the outlet to produce a foaming sheet;
a thickness regulating unit located outside and corresponding to the outlet of the extrusion unit, the thickness regulating unit including an inlet, a channel configured to deliver the foaming sheet, and a cooler configured to cool the foaming sheet and to regulate a thickness of the foaming sheet;
a rolling apparatus including a first roller, a second roller, and a press roller, wherein the first roller is configured to deliver a printing layer toward the press roller, and the second roller is configured to deliver an abrasion resistant layer toward the press roller;
wherein the press roller is arranged beside the thickness regulating unit, and the press roller includes two delivery rollers, a contacting roller, two pressing rollers, and multiple guiding rollers outside the contacting roller, wherein the contacting roller is configured to roll the foaming sheet, the printing layer, and the abrasion resistant layer together, and a heating unit heats the foaming sheet, the printing layer, and the abrasion resistant layer so that the foaming sheet, the printing layer, and the abrasion resistant layer are connected together by using the two pressing rollers;
wherein the two delivery rollers and the two pressing rollers are located on two sides of the contacting roller respectively, the multiple guiding rollers and the heating unit are located above the contacting roller, and the two delivery rollers are aligned with the thickness regulating unit;
wherein the two pressing rollers contact with each other and are spaced a distance away from the contacting roller of the press roller;
wherein the thickness regulating unit includes multiple roller sets driven by a motor to rotate, wherein the cooler has a cooling tube arranged in each rolling element of each roller set so as to flow cooling water;
wherein when the foaming sheet is delivered through the thickness regulating unit, the thickness of the foaming sheet is regulated by the thickness regulating unit and is cooled by the cooler, and wherein after the foaming sheet is rolled by the two delivery rollers so as to regulate the thickness of the foaming sheet again.

### Claim 2 (depends on 1)

The equipment as claimed in claim 1, wherein the extrusion unit is an extruder configured to extrude a sole-layer foaming sheet or is at least two extruders configured to extrude a multi-layer foam with different harnesses in each layer.

### Claim 3 (depends on 1)

The equipment as claimed in claim 1, wherein the plastic material of the foaming sheet is physical foamed or is chemical foamed, and an expansion ratio of the plastic material is adjustable based on a thickness of the abrasion resistant layer.

### Claim 4 (depends on 1)

The equipment as claimed in claim 1, wherein the heating unit includes multiple guide tubes accommodated in the contacting roller and the two pressing rollers respectively so as to heat the contacting roller and the two pressing rollers by mating with circulating hot oil of an external device.

### Claim 5 (depends on 1)

The equipment as claimed in claim 1, wherein the heating unit is an electric heater which is arranged outside and corresponds to the contacting roller and is housed in a casing.