Transmission belt manufacturing method and transmission belt

Patent metadata

Field	Value
Publication number	US-10000029-B2
Application number	US-201615232602-A
Country	US
Kind code	B2
Filing date	Aug 9, 2016
Priority date	Feb 12, 2014
Publication date	Jun 19, 2018
Grant date	Jun 19, 2018

Abstract

A method of manufacturing a power transmission belt includes: molding and vulcanizing an endless tension member layer in which a cord extending in a belt length direction is embedded; molding and vulcanizing a rubber member for a compressed rubber layer; and bonding together the tension member layer that has been vulcanized and the rubber member, that has been vulcanized, for the compressed rubber layer.

First claim

What is claimed is:

1. A method of manufacturing a power transmission belt, the method comprising:
molding and vulcanizing an endless tension member layer in which a cord extending in a belt length direction and helically disposed with a predetermined pitch in the belt width direction is embedded;
molding and vulcanizing a rubber member for a compressed rubber layer; and
bonding together the endless tension member layer that has been vulcanized and the rubber member, that has been vulcanized, for the compressed rubber layer.

2. The method of claim 1 , wherein
the bonding includes pressing together a surface of the tension member layer and a surface of the rubber member for the compressed rubber layer which are activated by a free-radical initiator.

3. The method of claim 1 , wherein
the bonding is performed using an adhesive.

4. The method of claim 1 , wherein
the bonding includes bonding together the tension member layer and the rubber member for the compressed rubber layer with an adhesive rubber sheet interposed therebetween.

5. The method of claim 1 , wherein
the rubber member for the compressed rubber layer is formed by extrusion molding.

6. The method of claim 5 , wherein
in the bonding, both ends of the rubber member for the compressed rubber layer in a length direction are bonded together.

7. The method of claim 5 , further comprising
prior to the bonding, bonding together both ends of the rubber member for the compressed rubber layer in a length direction.

8. The method of claim 1 , wherein
the tension member layer and the rubber member for the compressed rubber layer are vulcanized under different conditions.

9. The method of claim 1 , wherein
the forming and vulcanizing the rubber member for the compressed rubber layer includes forming and vulcanizing a first rubber member for a compressed rubber layer, and forming and vulcanizing a second rubber member for a compressed rubber layer, and
the bonding is bonding the first rubber member for the compressed rubber layer to an inner circumferential surface of the tension member layer, and bonding the second rubber member for the compressed rubber layer to an outer circumferential surface of the tension member layer.

10. The method of claim 9 , wherein
the first rubber member for the compressed rubber layer and the second rubber member for the compressed rubber layer are vulcanized under different conditions.

11. A power transmission belt manufactured by the method of claim 1 .

12. The method of claim 1 , wherein
the molding and vulcanizing the endless tension member layer include
inding a first unvulcanized rubber sheet around a molding drum,
helically spinning a cord around the molding drum around which the first unvulcanized rubber sheet is wound,
after spinning the cord, winding a second unvulcanized rubber sheet around the molding drum to produce a cylindrical laminated body,
vulcanizing the cylindrical laminated body, and
cutting the vulcanized cylindrical laminated body with a predetermined width.

13. The method of claim 6 , wherein
both ends of the rubber member for the compressed rubber layer in a length direction have uneven shapes complementary to each other, and the both ends of the rubber member for the compressed rubber layer in the length direction are bonded together.

Assignees

• Bando Chemical Ind

Inventors

• Miyata Hirofumi
• Nakane Soichiro
• Izumi Hisashi

Classifications

• F16G5/06

  with reinforcement bonded by the rubber · CPC title

• B29K2105/10

  Cords, strands or rovings, e.g.} oriented {cords, strands or rovings · CPC title

• F16G1/28

  with a contact surface of special shape, e.g. toothed · CPC title

• F16G1/04

  made of fibrous material, e.g. textiles, whether rubber-covered or not (F16G1/28 takes precedence; making thereof D03D {; consisting of several parts F16G1/22}) · CPC title

• F16G3/10

  Joining belts by sewing, sticking, vulcanising, or the like; Constructional adaptations of the belt ends for this purpose · CPC title