Method of manufacturing a basic element with a seal integrally formed thereon, and a lock housing formed with such a method

摘要

The base member (1) is injection molded in plastic and a seal (2) based on either an elastomer, rubber, thermoplastic elastomer (TPE) or silicone (3) is vulcanized onto the base member and an enclosed chamber (5) is formed in the seal. An Independent claim is included for a lock housing with a seal (2) having a closed chamber (5) vulcanized onto the base member (1). Preferred Features: The sealing material (3) is injected into a tool cavity (11) and pressurized gas forces the seal material against the tool wall (14) or the connecting surface (4) of the base member (1) to form a hollow chamber (5) in the seal. The tool (10) may be heated or cooled during injection and the tool temperature and/or gas pressure are controlled according to set profiles. Wall thickness can be adjusted by varying the gas pressure and the latter is reduced only after component cooling. The seal may comprise a combination of thermoplastics and elastomers and the polymer may be foamed during or after feeding into the mold cavity.