Wax injection machine and injection nozzle for lost wax casting

Abstract

Disclosed is an injection nozzle 30 for a wax injection molding machine, whereby coming off / displacing of a seal member 35 for sealing a exhaust channel 33c can be prevented, and / or sealing properties of the seal member 35 can be enhanced. An injection nozzle 30 is provided with: an outer cylinder 31; an inner cylinder 32 movable in a front-rear direction; a wax flow channel 33d defined by the inner wall of the inner cylinder 32, and communicating with an inner cylinder opening 32b at a front end of the inner cylinder; an exhaust flow channel 33c defined between the inner wall of the outer cylinder 31 and the outer wall of the inner cylinder 32, and communicating with an outer cylinder opening 33a at a front end of the outer cylinder 31; a wax valve for opening and closing the wax flow channel 33d, and an exhaust valve for opening and closing the exhaust flow channel 33c. The outer cylinder 31 includes a small-inside-diameter part 31a to which the outer cylinder opening 33a is formed. The inner cylinder 32 includes a small-outside-diameter part 32a to which the inner cylinder opening 33b is formed, and an outer surface tapered part 32b whose outside diameter increases from the small-outside-diameter part 32a to rearward. The exhaust valve includes a seal member 35 attached to the outer surface tapered part 32b.

Description

technical field [0001] The present application relates to a wax injection machine used in lost wax casting and an injection nozzle used in the wax injection machine used in lost wax casting. Background technique [0002] Ornaments, ornaments, jewelry, etc., mainly using precious metals are formed into small, complex and precise shapes. There is a demand to mass-produce such products, and the lost-wax investment casting method has been developed in this field. Of course, the lost-wax investment casting method can also be applied to the manufacture of precision industrial parts other than the above. [0003] Lost wax precision casting in the jewelry manufacturing field includes the following processes. [0004] The first step is a step of making a master model. [0005] The second step is a step of making a rubber mold having a cavity having the same shape as the original mold. [0006] The third step is a step of manufacturing a wax mold having the same shape as the origi...

AI Technical Summary

Problems solved by technology

In addition, there are many cases where the hardness of the rubber is changed according to the durability of the rubber mold and the difficulty of taking the wax mold out of the rubber mold.

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