Process of bonding two rubber bodies by vulcanization of a connecting layer, products suitable for use in such process and products thus obtained
AssigneeCompanie Generale des Etablissements Michelin
InventorsMichel Remond, Bernard Rossignol
Life of this patent
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Abstract
A process of bonding two bodies of rubber by vulcanization of a connecting layer of vulcanizable rubber provides essentially a new manner of organizing the drainage of gaseous inclusions imprisoned between the bodies and/or resulting from the subsequent vulcanization reaction and of collecting these gases; the gaseous inclusions travel towards at least one conduit which passes through at least one of the two bodies, or else towards dead-end holes provided in one of the faces intended to be bonded.
Claims16
A process of bonding one face of a first body of rubber to one face of a second body of rubber without the use of an airtight flexible sheath which consists of
- applying said face of the first body to said face of the second body with interpositioning of a connecting layer of vulcanizable rubber,
- evacuating gaseous inclusions imprisoned between the rubber bodies and/or resulting from a subsequent vulcanization reaction, and
- vulcanizing the resultant assembly, characterized by the fact that
- said face of the first body is applied in such a manner that at least the edges of said face of the first body are complementary in shape with said face of the second body, and
- the gaseous inclusions are evacuated by suction towards at least one orifice provided in at least one of said faces, each orifice being the base of a conduit which passes through at least one of the rubber bodies and to which a flexible suction hose is attached.
A process of bonding one face of a first body of rubber to one face of a second body of rubber without the use of an airtight flexible sheath which consists of
- applying said face of the first body to said face of the second body with interpositioning of a connecting layer of vulcanizable rubber,
- evacuating gaseous inclusions imprisoned between the rubber bodies and/or resulting from a subsequent vulcanization reaction, and
- vulcanizing the resultant assembly, characterized by the fact that
- said face of the first body is applied in such a manner that at least the edges of said face of the first body are complementary in shape with said face of the second body, this application being achieved in an environment in which a pressure p.sub.1 prevails, and
- the gaseous inclusions are evacuated towards at least one orifice provided in at least one of said faces, each orifice being the base of a dead-end hole, and the evacuation of the gaseous inclusions being effected in an enclosure in which there prevails a pressure p.sub.2 greater than the pressure p.sub.1.
A body of rubber, one of the faces of which is intended to be bonded onto one face of another body of rubber, characterized by the fact that said face intended to be bonded comprises means for the drainage of gaseous inclusions, the drainage means not debouching at the edges of said face intended to be bonded and leading to at least one orifice provided in said face intended to be bonded, each orifice being the base of a dead-end hole.
Dependencies are inferred from the claim text.