초록 ▼

A gasket such as a cylinder head gasket molded of an amorphous fiber reinforced thermoplastic resin composite having at least 3% by weight of reinforcing fibers, and having an integral non-elastomeric sealing bead extending above the gasket body and surrounding at least one service opening, and a me

A gasket such as a cylinder head gasket molded of an amorphous fiber reinforced thermoplastic resin composite having at least 3% by weight of reinforcing fibers, and having an integral non-elastomeric sealing bead extending above the gasket body and surrounding at least one service opening, and a method of making such a gasket.

대표청구항 ▼

A cylinder head gasket for an internal combustion engine having a head, a block, at least one combustion chamber and at least one passage for fluid communication between the head and the block, the cylinder head gasket comprising: an integrally molded thin main gasket body having expansive main surf

A cylinder head gasket for an internal combustion engine having a head, a block, at least one combustion chamber and at least one passage for fluid communication between the head and the block, the cylinder head gasket comprising: an integrally molded thin main gasket body having expansive main surfaces and defining a plurality of openings including at least one combustion opening and at least one aperture for fluid communication between the head and the block of an internal combustion engine, said main gasket body being molded of a reinforced thermoplastic resin composite, said thermoplastic resin, in an unfilled state, having a high heat distortion temperature of at least 347°F. at 264 psi (according to ASTM Test D648), and being essentially inert to water, and to automotive fuels, coolants and oils, said resin being substantially amorphous and having an aromatic backbone, having a flexural modulus of at least about 250,000 psi and a relatively high elongation to promote sealing, said resin being filled and reinforced with fibers in an amount of at least 3% by weight of the unfilled resin, said fibers having a higher stiffness and strength than said unfilled resin and being deformable in tension, compression and bending under transverse loading without fracturing, said fibers having a tensile modulus of not less than 10×106 psi at 500°F., said fibers serving to distribute loads to which the gasket is subjected in use between the fibers and the resin, said fibers having good bonding to the resin and having a higher modulus and strength than said unfilled resin to sustain a larger proportion of load, and thereby to provide high sealing stress retention and to prevent torque loss in use by reducing the stress relaxation of the unreinforced resin, said fibers being random in orientation and short in length and having an aspect ratio of at least 20, and said main gasket body as molded having an integrally formed non-elastomeric sealing bead extending above the main gasket body and surrounding at least one of said plurality of openings.