Cloth molding process

• US 4,287,143 A
• Filed: 10/10/1979
• Issued: 09/01/1981
• Est. Priority Date: 03/19/1979
• Status: Expired due to Term

• Current Assignee: Sears Manufacturing Co.
• Original Assignee: Sears Manufacturing Co.
• Inventors: Sears, I. Weir Jr., Quertain, Raoul
• Primary Examiner(s): Anderson, Philip
• Application Number:
  US06/083,537
• Time in Patent Office: 692 Days
• Field of Search: 264/46.8, 264/46.6, 264/45.3, 264/320, 264/327, 428/425
• US Class Current: 264/46.8
• CPC Class Codes: B29C 44/146 Shaping the lining before foaming
• CPC Class Codes: B29C 51/145 having at least one layer of textile or fibrous material combined with at least one plastics layer
• CPC Class Codes: B29K 2313/00 Use of textile products or fabrics as reinforcement B29K2105/06 takes precedence
• CPC Class Codes: B32B 27/08 of synthetic resin
• CPC Class Codes: B32B 27/12 next to a fibrous or filamentary layer
• CPC Class Codes: B32B 5/24 one layer being a fibrous or filamentary layer
• CPC Class Codes: B32B 5/245 another layer next to it being a foam layer

Abstract

A method of molding cloth. A special multi-layer cloth is first preheated and then drawn into a heated mold by means of a vacuum between the cloth and the mold. The cloth includes a fabric layer having a heat-fixable fiber, a polyurethane foam layer and a polyvinyl chloride film layer bonded together. The cloth is preheated to at least the greater of the set temperatures of the fabric layer and the polyvinyl chloride film. The mold is heated to at least the same temperature. After the cloth has conformed to the contours of the mold, the cloth is transferred to a cooler mold. The steps of heating the cloth in the mold and then cooling the cloth in the cooler mold sets the stitch of the fabric to the contours of the mold. Polyurethane foam may then be poured into the mold and allowed to expand to form a seat cushion or the like.

Claims

1. A process for molding cloth comprising the steps of:

drawing the cloth into a heated mold, the cloth including a fabric layer having a fiber heat-fixable at a set temperature, and an elastic composition layer bonded to the fabric layer, the temperature of the mold being at least the heat-fixable fiber set temperature;

heating the cloth to at least the heat-fixable fiber set temperature, including the step of transferring energy from the heated mold to the cloth;

transferring the cloth into a mold having a temperature less than the fiber set temperature; and

cooling the cloth, the process heat-fixing the heat-fixable fiber of the cloth to the shape of the mold.

4. A process as in claim 1, 2 or 3 further comprising the step of preheating the cloth prior to the drawing step.

9. A process as in claim 1, 2, 7 or 8 wherein the drawing step includes the step of creating a vacuum between the cloth and the mold to thereby conform the cloth to the shape of the mold.

10. A process as in claim 1, 2, 3 or 8 further comprising the step of pouring rigid foam into the mold after the cooling step.

13. A process as in claim 10 wherein said applying step further comprises the step of inserting an inlay in the mold.

14. A process as in claim 10 wherein said applying step further comprises the step of roughening the surface of the mold to form the pattern.

2. A process for molding cloth comprising the steps of:

applying a pattern to a mold surface;

heating said mold;

drawing the cloth into said heated mold, the cloth including a fabric layer having a fiber heat-fixable at a set temperature, and an elastic composition layer bonded to the fabric layer, the elastic composition layer including a thermoplastic film layer, the temperature of the mold being at least the greater of the heat-fixable fiber set temperature and the film layer softening temperature;

heating the cloth to at least the greater of the heat-fixable fiber set temperature and the film layer softening temperature, including the step of transferring energy from the heated mold to the cloth; and

cooling the cloth, the process heat-fixing the heat-fixable fiber and the film layer to the shape of the mold.

5. A process as in claim 2 or 3 wherein said applying step further comprises the step of inserting an inlay in the mold.

6. A process as in claim 2 or 3 wherein said applying step further comprises the step of roughening the surface of the mold to form the pattern.

3. A process for molding cloth comprising the steps of:

applying a pattern to a mold surface;

heating the mold;

drawing the cloth into the heated mold, the cloth including a fabric layer having a fiber heat fixable at a set temperature, and an elastic composition layer composition including a flexible foam layer and a thermoplastic mold being at least the greater of the heat-fixable fiber set temperature and the film layer softening temperature;

heating the cloth to at least the greater of the film layer softening temperature and the heat-fixable fiber set temperature including the step of transferring energy from the heated mold to the cloth;

transferring the cloth into a mold having a temperature less than the lower of the heat-fixable fiber set temperature and the film layer softening temperature; and

cooling the cloth, the process heat-fixing the heat-fixable fiber and the film layer to the shape of the mold.

7. A process for forming a cloth-covered item comprising the steps of:

drawing the cloth into a heated mold, the cloth including a fabric layer having a fiber heat-fixable at a set temperature, and an elastic composition layer bonded to the fabric layer, the temperature of the mold being at least the heat-fixable fiber set temperature;

heating the cloth to at least the heat-fixable fiber set temperature, including the step of transferring energy from the heated mold to the cloth;

transferring the cloth into a mold having a temperature less than the heat-fixable fiber set temperature;

cooling the cloth; and

pouring a liquid foam composition into the mold, the process heat-fixing the heat-fixable fiber of the cloth to the shape of the mold and filling the back side of the molded cloth with foam.

8. A process for molding cloth comprising the steps of:

bonding a flexible foam layer to a thermoplastic film layer, the foam layer and film layer forming an elastic composition layer;

bonding the foam layer to a fabric layer having a fiber heat-fixable at a set temperature, the cloth comprising the foam layer, film layer and fabric layer;

preheating the cloth to at least the greater of the film layer softening temperature and fiber set temperature;

drawing the cloth into a heated mold, the temperature of the mold being at least the greater of the film layer softening temperature and the fabric layer set temperature;

heating the cloth in the mold to at least the greater of the film layer softening temperature and the fiber set temperature, including the step of transferring energy from the heated mold to the cloth;

transferring the cloth in a mold having a temperature less than the lower of the film layer softening temperature and the fabric layer set temperature; and

cooling the cloth, the process heat-fixing the heat-fixable fiber of the fabric layer and the film layer to the shape of the mold.

11. A process for forming cloth-covered items comprising the steps of:

bonding a flexible foam layer to a thermoplastic film layer, the foam layer and film layer forming an elastic composition layer;

bonding the foam layer to a fabric layer having a fiber heat-fixable at a set temperature, the cloth comprising the foam layer, the film layer and the fabric layer;

preheating the cloth to a temperature of at least the greater of the heat-fixable fiber set temperature and the film layer softening temperature;

drawing the cloth into a heated mold, the temperature of the mold being at least the greater of the heat-fixable fiber set temperature and the film layer softening temperature;

heating the cloth to at least the greater of the film layer softening temperature and the heat-fixable fiber set temperature, including the step of transferring energy from the heated mold to the cloth;

transferring the cloth into a mold having a temperature less than the lower of the fiber set temperature and the film layer softening temperature;

cooling the cloth; and

pouring a liquid foam composition into the mold, the process heat-fixing the heat-fixable fiber of the fabric layer and the film layer to the shape of the mold and filling the back side of the molded cloth with foam.

12. A process as in claim 7 or 11 further comprising the step of applying a pattern to the mold surface.