초록 ▼

An apparatus for compression-molding plastic without producing flashes. The apparartus basically consists of a pair of dies complementary to each other, one being stationary and the other being movable so as to be capable of engaging the stationary one. The apparatus has substantially no clearance a

An apparatus for compression-molding plastic without producing flashes. The apparartus basically consists of a pair of dies complementary to each other, one being stationary and the other being movable so as to be capable of engaging the stationary one. The apparatus has substantially no clearance at a pinch-off section formed by the engaging edge portions of the two dies, and at least one of the engaging edge portions is made of plastic. In one embodiment of the invention both the engaging edge portions are made of plastic.

대표청구항 ▼

A compression molding apparatus comprising: a first die defining an inner edge portion; and a second die defining an outer edge portion having a configuration substantially complementary to that of the inner edge portion of said first die, said dies collectively defining a mold cavity having a shape

A compression molding apparatus comprising: a first die defining an inner edge portion; and a second die defining an outer edge portion having a configuration substantially complementary to that of the inner edge portion of said first die, said dies collectively defining a mold cavity having a shape corresponding to that of an article to be molded, at least one of said inner and said outer edge portions comprising thermosetting resin having a flexural modulus of at least 50 kgf/mm2 at 140°C., said dies movable in the apparatus relative to one another between a first position at which said dies are spaced apart from one another and a second position at which the inner edge portion defined by said first die mates with the outer edge portion of said second die in the apparatus with substantially no clearance therebetween, and said inner and outer edge portions of said dies, when in said second position, constituting a pinch-off section of the apparatus at which said mold cavity terminates.