US 6,439,872 B1Granted

Apparatus for manufacturing lenses for vehicle lamps

AssigneeKoito Manufacturing Co., Ltd.

InventorsMitsuteru Yoshinaga, Makoto Sano

Life of this patent

Estimating the term…

Loading patent…

Abstract

There is provided an apparatus for manufacturing lenses for vehicle lamps, wherein the lenses are formed from at least first and second types of synthetic resins by molding the first and second synthetic resins integrally with each other. The apparatus includes a first mold having a common mold and a first stationary mold and defining a first cavity in which the first synthetic resin is injection molded, and a second mold constructed from the common mold and a second stationary mold and defining a second cavity in which the first synthetic resin and the second synthetic resin are molded integrally with each other with the first synthetic resin being contained within the second cavity. A partition wall is provided on the first stationary mold in such a manner as to protrude therefrom for preventing the first synthetic resin from intruding into any place other than the first cavity when the first mold is closed. Also, a distal end face of the partition wall is shaped such that the distal end face gradually tapers away from the common mold as the distal end face gets farther away from the first cavity.

Claims7

Dependent claims

An apparatus for manufacturing lenses for vehicle lamps, wherein the lenses are formed from at least first and second synthetic resins by molding said first and second synthetic resins integrally with each other, said apparatus comprising:

a first mold, comprising:
a common mold;
and
a first stationary mold;
wherein said first mold defines a first cavity in which said first synthetic resin is injection molded;
and
a second mold comprising:
said common mold;
and
a second stationary mold;
wherein said second mold defines a second cavity in which said first synthetic resin and said second synthetic resin are molded integrally with each other with said first synthetic resin being contained within said second cavity;
wherein a partition wall is provided on said first stationary mold so as to protrude therefrom, wherein said partition wall is operable to prevent said first synthetic resin from intruding into any place other than said first cavity when said first mold is closed, and wherein a distal end face of said partition wall is shaped such that said distal end face gradually tapers away from said common mold with increasing distance along said distal end face in a direction away from said first cavity.

9 more elements

Dependencies are inferred from the claim text.