| 摘要 |
Wax pen extrudes wax at a controlled temperature from a nozzle for building a wax pattern such as is employed in the lost wax casting process. The wax pen carries its wax in a cylinder from which the wax is forced through a delivery barrel and out of the nozzle. Wax temperature is sensed in the delivery barrel to control the heating of the wax in the barrel and in the cylinder. The wax may be expelled by a spring-driven or a motor-driven piston.
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