Appeal No. 96-3174
Application 07/970,608
APPENDIX
1. A method of forming an article having a prescribed
volume and mass from a molten plasticized resin using an
injection molding machine, comprising the steps of:
(a) forming an oversized mold cavity with respect to
an opposing pair of relatively movable mold members of said
injection molding machine between which mold members said
article is formed;
(b) injecting into said oversized mold cavity a volume
of plasticized resin exceeding the prescribed volume of the
article to be formed and having a mass at least equal to the
prescribed mass of the article;
(c) applying force to said mold members to reduce a
volume of said mold cavity and compress said plasticized resin
therein simultaneously with the injection of said resin
thereby to form said article.
10. A method of forming a plurality of articles from a
molten plasticized resin using an injection molding machine
having first and second mold platens, first and second mold
members, each having a corresponding plurality of mold
structures, comprising:
(a) forming a plurality of pre-enlarged mold cavities by
adjusting relative positions of opposing mold members, at
least one of which is capable of movement relative to the
other, said mold cavities having dimensions determined by
distance between the platens, and said members initially being
separated to form pre-enlarged cavities with volumes each
greater than a maximum volume occupied at atmospheric pressure
by the molten plasticized resin to be injected into the
cavity, thereby to receive plasticized resin without
introducing back pressure;
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