US 5,302,104 AGranted

Resin denture base molding apparatus

AssigneeHigh Dental Service Co., Ltd.

InventorNoboru Ueda

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Abstract

An improved resin denture base molding apparatus for molding denture bases by injecting fused resin R into a denture base plaster mold formed in a flask F, wherein the improvement includes a table 2 provided in a manner capable of elevating up and down along a plurality of vertical guide rods 1, an elevation driving mechanism 3 for elevating the table 2, an upper support member 6 provided horizontally across each upper end of the guide rods 1 and having a through hole 4, a spring storing section 7 provided at the location of the through hole 4 on the upper surface of the upper support member 6, a push spring 8 stored in the spring storing section 7, a piston rod 10 inserted in the through hole 4 and urged downwardly by the push spring 8 and having a resin pressurizing piston 9 at the lower end thereof, a flask F placed on the table 2 and having a resin filling hole 11 at the top thereof, a cylinder 13 having a resin passage 12 that communicates with the resin filling hole 11 at the bottom wall thereof and is located below the piston 9 and a pressure breakable member 14 disposed within the cylinder 13 so that it covers the resin passage 12.

Claims7

Dependent claims

A resin denture base molding apparatus for molding denture bases by injecting fused resin, comprising:

a table provided in a manner capable of elevating up and down along a plurality of vertical guide rods;
an elevation driving means for elevating said table;
an upper support member provided horizontally across each upper end of said guide rods and having a through hole;
a spring storing section provided at a location of said through hole on an upper surface of said upper support member;
a push spring stored in said spring storing section;
a piston rod inserted in said through hole, urged downwardly by said push spring and having a resin pressurizing piston at the lower end thereof;
a flask having a denture base mold placed on said table and having a resin filling hole at the top thereof;
a cylinder having a resin passage that communicates with said resin filling hole at a bottom wall thereof and located below said piston;
and
a pressure breakable member disposed within said cylinder so that the pressure breakable member covers said resin passage;
and
wherein said piston rod has an abutment surface which abuts a fixed member when said piston is pushed against the resiliency of the spring to a completely retracted position, said fixed member being fixed relative to said upper support member.

9 more elements

Dependencies are inferred from the claim text.