CN-224209084-U - Wax injection head of wax injection machine

CN224209084UCN 224209084 UCN224209084 UCN 224209084UCN-224209084-U

Abstract

The utility model relates to a wax injection head of a wax injection machine. The telescopic tube comprises a first sleeve and a second sleeve, wherein a trapezoid annular gasket is arranged at the inner end of the first sleeve, a telescopic tube is sleeved in the second sleeve, a plug fixedly connected with the telescopic tube is arranged in the first sleeve, an injection cavity is formed in the telescopic tube, a through hole which is communicated with the inside and the outside is formed in one end of the telescopic tube, which is close to the plug, a butt joint part is arranged at the head part of the telescopic tube, a reset spring is arranged between the butt joint part and the second sleeve, a shunt channel communicated with the cavity of the telescopic tube is arranged on the first sleeve, a buffer liner is connected to the shunt channel, a piston is arranged in the buffer liner, and the cavity of the buffer liner is divided into an air cavity and a liquid cavity by the piston. Through add the buffer courage on first sleeve, when the hydraulic pressure of wax liquid changes, utilize the compressible nature of air in the air cavity, the pressure difference between air cavity and the liquid chamber can promote the piston self-adaptation and remove, and then reduces hydraulic change range to alleviate the resistance that flexible pipe received, reduce rigid collision.

Inventors

WU KONGXIANG
SUN JINXIONG
LIU HUOHUA

Assignees

遂昌县鑫鼎特种铸造有限公司

Dates

Publication Date: 20260508
Application Date: 20250606

Claims (5)

1. The wax injection head of the wax injection machine is characterized by comprising a first sleeve and a second sleeve which are connected end to end, wherein the inner diameter of the second sleeve is smaller than that of the first sleeve, a trapezoid annular gasket is arranged at the inner end of the first sleeve, a telescopic pipe is sleeved in the second sleeve, a plug fixedly connected with the telescopic pipe is arranged in the first sleeve, the size of the plug is smaller than that of the inner pipe diameter of the first sleeve, the plug can be in sealing butt joint with the trapezoid annular gasket, an injection cavity is formed in the telescopic pipe, a through hole penetrating inside and outside is formed in one end, close to the plug, of the telescopic pipe, the other end of the telescopic pipe extends out of the second sleeve partially, a butt joint part is arranged at the head of the telescopic pipe, a reset spring is arranged between the butt joint part and the second sleeve, a shunt channel communicated with the inner cavity of the telescopic pipe is arranged on the first sleeve, a buffer liner is connected with the shunt channel, a piston is arranged in the buffer liner, and the piston separates the inner cavity of the buffer liner into a liquid cavity and a liquid cavity.
2. The wax injection head of the wax injection machine according to claim 1, wherein the second sleeve is divided into a first section and a second section, the two sections are mutually screwed and fixed, clearance fit is formed between the first section and the telescopic pipe, guide fit is formed between the second section and the telescopic pipe, the first section is connected with the first sleeve, and a plurality of first sealing rings are sleeved on the inner wall of the first section.
3. The wax injection head of the wax injection machine of claim 2, wherein the second section is provided with an electrothermal sleeve.
4. The wax injection head of the wax injection machine of claim 1, wherein the buffer liner comprises a liner body, a liner cover and a rotary joint, the rotary joint is in rotary joint with the split flow channel, the liner body is in rotary joint with the liner cover, and a second sealing ring is arranged between the liner body and the liner cover in a filling way.
5. The wax injection head of the wax injection machine of claim 1, wherein the outer end of the first sleeve is provided with an abutment and a flange body.

Description

Wax injection head of wax injection machine Technical Field The utility model relates to a wax injection machine, in particular to a wax injection head of the wax injection machine. Background The precision casting process generally comprises the steps of wax injection, assembly welding, slurry dipping, sand floating, drying, dewaxing, sintering, casting and the like, wherein the wax injection process is to inject molten wax liquid into a mold which is manufactured according to the shape and the size of a product, and form a wax piece through condensation and solidification. The wax injection procedure is correspondingly applied to a wax injection machine, and a wax injection head on the wax injection machine is a part for wax injection and is used for being in butt joint with a die, and generally has the function of lifting up and down. In the prior art, the wax injection head of the wax injection machine cannot be contracted generally, so that rigid collision is easy to occur when the nozzle is contacted with the mold, the pipe body of the wax injection head is damaged, and the situation is easy to occur when the size of the mold is changed and the descending height of the wax injection head needs to be adjusted after the mold is replaced. Therefore, the patent (CN 219484112U) named as a wax injection mechanism of a wax injection machine is disclosed, the wax injection machine comprises a reducer pipe, a first connecting pipe, a second connecting pipe and a wax injection pipe, wherein an insertion groove is formed in the lower surface of the wax injection pipe, an insertion frame is connected in an embedded mode in the insertion groove, a resistance wire heating plate is connected in an embedded mode on the outer surface of the insertion frame, a threaded ring is connected to the outer surface of the wax injection pipe in a threaded mode, a spring is connected to the outer surface of the wax injection pipe in a nested mode, when the wax injection pipe is collided, the spring can be automatically compressed to enable the wax injection pipe to extend into the reducer pipe, damage to the wax injection pipe is avoided, and the expansion and the discharge of the wax injection pipe are combined together, so that the device is convenient to automatically feed. However, the liquid wax pressure on the upper side of the wax injection pipe is increased instantaneously due to the fact that the wax injection pipe is compressed upwards, so that resistance is increased rapidly when the wax injection pipe is retracted, and the wax injection pipe is possibly damaged. Disclosure of Invention The utility model provides a wax injection head of a wax injection machine, which solves the problem that the wax injection head is easily damaged due to rigid contact when the wax injection machine is in butt joint with a die in the prior art. The technical problem is mainly solved by the following technical scheme that the wax injection head of the wax injection machine comprises a first sleeve and a second sleeve which are connected end to end, the inner diameter of the second sleeve is smaller than that of the first sleeve, a trapezoid annular gasket is arranged at the inner end of the first sleeve, a telescopic pipe is sleeved in the second sleeve, a plug fixedly connected with the telescopic pipe is arranged in the first sleeve, the size of the plug is smaller than that of the inner pipe diameter of the first sleeve, the plug can be in sealing butt joint with the trapezoid annular gasket, an injection cavity is formed in the telescopic pipe, a through hole which penetrates through the inside and the outside is formed in one end, close to the plug, of the telescopic pipe, the other end of the telescopic pipe extends out of the second sleeve partially, a butt joint part is arranged at the head of the telescopic pipe, a reset spring is arranged between the butt joint part and the second sleeve, a shunt channel communicated with the inner cavity of the telescopic pipe is arranged on the first sleeve, a buffer liner is connected to the shunt channel, and a piston is arranged in the buffer liner, and the piston separates the inner cavity of the buffer liner from the buffer cavity. The first sleeve is fixedly connected to a lifting module on the wax injection machine and is communicated with a wax liquid conveying pipeline. The wax injection principle of the utility model is that the wax injection head descends synchronously along with the lifting module on the wax injection machine, the butt joint part gradually approaches to the wax injection hole position on the mould until the butt joint part is mutually abutted, at the moment, the telescopic pipe is subjected to resistance and moves upwards relative to the first sleeve, at the moment, the hydraulic pressure in the first sleeve is increased, the wax liquid can flow into the buffer liner from the shunt channel, the piston deviates to one side of the air cavity to avoid the rapid incr