초록 ▼

A method and apparatus for forming belt sleeves having grooves provided in either or both of the inner and outer surfaces thereof. The manufacture includes the provision of a preform laminate on an inner mold and the forcible urging of a constrictable outer mold radially against the laminate at elev

A method and apparatus for forming belt sleeves having grooves provided in either or both of the inner and outer surfaces thereof. The manufacture includes the provision of a preform laminate on an inner mold and the forcible urging of a constrictable outer mold radially against the laminate at elevated temperatures so as to effect curing of the rubber of the laminate in accurate conformity to the grooved configuration of the inner and outer molds. The entire assembly is carried on a central support post. Pressure plates are provided for urging the constrictable outer mold radially inwardly as the result of threaded advance of nuts on the central post. The grooves in the mold surfaces may selectively be arranged to extend parallel or circumferentially of the central axis of the post as desired to form either longitudinally or transversely extending ribs, grooves, etc., in the formed sleeve belt.

대표청구항 ▼

The method of forming a belt sleeve comprising: providing an inner mold having a radially outer surface defining a preselected configuration for forming the inner surface of the desired belt sleeve; providing a preform comprising layers of uncured rubber, fabric, and tensile cord concentrically abou

The method of forming a belt sleeve comprising: providing an inner mold having a radially outer surface defining a preselected configuration for forming the inner surface of the desired belt sleeve; providing a preform comprising layers of uncured rubber, fabric, and tensile cord concentrically about said inner mold; providing end members at the axially opposite ends of said inner mold for effectively defining a molding space concentrically surrounding the inner mold in which said preform is disposed; providing in spaced concentric relationship to said inner mold a split outer mold having a radially inner surface defining a preselected configuration for forming the outer surface of the desired belt sleeve; forcibly urging the outer mold radially inwardly to compress said preform and cause radially inner and outer surfaces thereof to conform accurately to said mold inner and outer surfaces with said mold configuration maintained accurately in a preselected relationship with each other, thereby to form the configurations of the inner and outer surfaces of the belt sleeve preform in correspondingly accurate preselected relationship; and curing said preform while maintaining said urging. Apparatus for forming a belt sleeve comprising: an inner mold having a radially outer surface defining a preselected configuration for forming the inner surface of a desired belt sleeve; end members at the axially opposite ends of the inner mold for effectively defining a molding space concentrically surrounding the inner mold for receiving a preform formed of layers of uncured rubber, fabric and tensile cord; a split outer mold in spaced concentric relationship to said inner mold having a radially inner surface defining a preselected configuration for forming the outer surface of the desired belt sleeve; and means for forcibly urging the outer mold radially inwardly to compress the preform and cause radially inner and outer surfaces thereof to conform accurately to said mold inner and outer surfaces, said urging means including means for causing the mold configurations to be maintained accurately in a preselected relationship with each other while concurrently curing the preform and maintaining said urging and thereby form the configurations of the inner and outer surfaces of the belt sleeve preform in correspondingly accurate preselected relationship.