公开(公告)号：US4963308A

公开(公告)日：1990-10-16

申请号：US337887

申请日：1989-04-14

申请人： Katuki Watanabe ,  Mamoru Minamimure

发明人： Katuki Watanabe ,  Mamoru Minamimure

IPC分类号： B29C45/14 ,  B29D29/08 ,  F16G1/28 ,  F16G5/08 ,  F16G5/20

CPC分类号： F16G1/28 ,  B29C45/14631 ,  B29D29/08 ,  B29K2021/00 ,  B29K2105/14

摘要： A method of making power transmission belt including an endless belt body made of an elastomer matrix. Embedded in the endless body are tensile cords used to strengthen the belt. Along the inner circumference of the belt are formed a plurality of teeth having teeth bottoms there between. Embedded in the endless belt body between the tensile cords and the surfaces of the teeth and teeth bottoms is a layer composed of nonwoven fabric having the elastomer matrix permeated therethrough. The nonwoven fabric layer is evenly diffused in the teeth, but is compressed at the tooth bottoms to form, along with the elastomer matrix permeated therethrough, a thinly compressed layer protecting the tensile cords. The nonwoven fabric is placed around the outer cylindrical surface of a cylindrical internal die in a substantially uncompressed state. The tensile cords are wound spirally over the nonwoven fabric to compress the fabric to a predetermined thickness. Elastomeric material is injected into the die and hardened to form the transmission belt.

公开(公告)号：US4895555A

公开(公告)日：1990-01-23

申请号：US173639

申请日：1988-03-25

申请人： Katuki Watanabe ,  Mamoru Minamimure

发明人： Katuki Watanabe ,  Mamoru Minamimure

IPC分类号： B29C45/14 ,  B29D29/08 ,  F16G1/28 ,  F16G5/08 ,  F16G5/20

CPC分类号： F16G1/28 ,  B29C45/14631 ,  B29D29/08 ,  B29K2021/00 ,  B29K2105/14

摘要： In raw-edge power transmission belts the tensile cords is covered with a thinly compressed layer composed of nonwoven fabric and elastomer matrix permeated therethrough at the tooth bottoms, and the nonwoven fabric is diffusedly mixed for reinforcing an elastomer matrix in the tooth parts.In the method of manufacture, the outer cylindrical circumference of the internal die along which toothed faces are formed are covered with nonwoven fabric under non pressure, and the tensile cords are wound spirally. Hereafter, dies are set up and elastomer material is injected and hardened. A transmission belt is drived by slicing roundly a cylindrically shaped body derived in these processes.