| 摘要 |
<p>The disclosure describes an injection molding station for a diaphragm cartridge for use in preparing dental prosthesis and medical devices in general. The cartridge (34, 134) and corresponding machine (10) allow for complete injection of thermoplastic resin. The cartridge (34, 134) is a predominantly cylindrical flat cartridge with a conical opening (36, 136). Plastic resin (35) is ejected from the opening in the cartridge when a heated plunger (26) is pushed on the bottom of the cartridge. During the injection of the resin into the flask, the bottom of the cartridge is deformed to eliminate the bursting of the cartridge. The cartridge is utilized in a station in which the cartridge is positioned in a tubular heating chamber with heating elements (56, 64) located on the plunger and the circumference of the cartridge. The cartridge is inserted into a compression plate (40) which supports the flask and controls the deformation of the cartridge. The resin (35) flows through the opening into a reversible flask made of primarily two parts (48, 50) which are automatically clamped together without the use of clamping devices. The cartridge has more thermoplastic resin than is required to fill the flask, to eliminate the possibility of thermal shrinkage and producing a less than optimum prosthesis.</p> |
