| 摘要 |
A pressing device for forming dentures, which comprises: an upper stationary platen on which an upper plaster mold containing an artificial tooth is held; a movable platen, disposed below the upper stationary platen, on which a lower plaster mold is held, wherein a softened thermoplastic resin preform is mounted on the lower plaster mold; and a pneumatic driving cylinder mechanism comprising a piston rod, disposed below and connected to a lower stationary platen, the top end of the piston rod being fixed to the movable platen; wherein the pneumatic driving cylinder mechanism comprising a driving cylinder operated by hydraulic pressure and a pneumatic booster integral with each other, is disclosed. A heating device for forming dentures, which comprises: a heating box movable in approximately horizontal directions between a pressing zone and an outer position, wherein a thermoplastic resin preform mounted upon a lower plaster mold is pressed against an upper plaster mold in the pressing zone; a driving mechanism comprising a second piston rod that moves in approximately vertical directions perpendicular to the approximately horizontal directions in which the heating box moves; and a connecting mechanism for connecting the heating box to the driving mechanism, wherein the connecting mechanism is provided with a function to change the approximately vertical directions into the approximately horizontal directions and vice versa, is also disclosed. A heating box for forming dentures, which comprises: a lower chamber comprising a far-infrared heater, wherein in order to soften a thermoplastic resin preform mounted on a lower plaster mold, a shape of a cross section of the far-infrared heater approximately corresponds to a shape of the preform; and an upper chamber comprising a heating board having its heat source as the far-infrared heater, the heating board being provided with means for generating far-infrared rays; wherein the lower chamber and the upper chamber are in a vertical arrangement, is further disclosed. These apparatuses shorten time required for compression molding, make themselves compact, and uniformly heat and soften a thermoplastic resin preform.
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