Apparatus and process for producing dentures having synthetic resin base

An apparatus for producing dentures having a synthetic resin base comprising a flask tank 20 having an open upper side for accommodating at least one flask 1, and an injection-filling device, the flask having a resin injecting gate 7 in an upper wall thereof and wax outlets 8 in a lower wall thereof, the flask tank 20 having a wax discharge bore 26 formed in a bottom wall thereof and adapted to communicate with the wax outlets 8 of the flask, the apparatus being operable to heat and melt a wax pattern 2 within the flask 1 as placed in the flask tank 20, remove wax from the flask 1 through the wax outlets 8 and the wax discharge bore 26, thereafter cause the injection-filling device to inject and fill a synthetic resin 43 from the resin injecting gate 7 into a pattern cavity 51 formed within the flask 1 by removing the wax, and polymerize and cure the filled resin, the apparatus being characterized in that the flask tank 20 is provided with a tank closure 21 openable when the flask 1 is to be brought into and out of the flask tank 20 and when the resin is to be injected into the flask, the tank closure 21 being closable when the wax is to be removed, the flask tank 20 being provided with a wax pattern heating source 33, the tank closure 21 being formed with fluid channels 23, 24, 25 adapted to communicate with the resin injecting gate 7 of the flask 1 for successively supplying cleaning hot water, drying air and separating agent to the interior of the flask 1 therethrough.