Production process

1、Mould design

Design reasonable casting molds according to product requirements.

2、Wax injection

Wax shooting is to heat K512 wax at a certain temperature, remove water, clean and stop it into paste, and then die cast into the wax shooting machine with a certain pressure.There is a certain geometry of the mold, the formation of the needed wax embryo. After dressing, inspection and combination, the next process is handed over.

3、Wax repair

(1)The wax embryo mold line, burr clean, smooth.

(2)Special parts cannot be repaired with a blade, so they must be repaired with other tools.

(3)Do not touch the wax embryo, put it neatly, handle it gently and do not crush it.

4、Shell making

Dip pulp is shell mold production process, and shell mold is made of binder, refractory materials and sand materials (sand, powder materials, etc.) and Malay sand, etc.) with slurry, slurry sticking sand, drying and hardening, wax and roasting processes.

The slurry made of binder and refractory powder is the base of shell mold structure. The slurry surface layer and reinforcement layer (back layer) are two

When the surface slurry is in contact with the metal, it should form a smooth, dense and solid surface of the shell mold, and not with the metal liquid hair.

To ensure the surface quality of casting. The backlayer slurry is thickened to strengthen the shell mold, so that it has good comprehensive performance.

Only slurry can not form shell mold, also need to do reinforcement with sticky sand, sticky sand can absorb the solvent in the slurry, so that it stops

Stop flow, prevent slurry loss, sticky sand can also prevent drying and hardening of slurry layer large area shrinkage and formation of wide large cracks, in addition, the sticky sand will cause a rough shell back, which is conducive to the combination of the upper and lower shell molds, and the sticky sand is also conducive to lifting air permeability of tall shells.

5、Dewaxing

Dewaxing is to put the shell mold into the dewaxing machine, after high temperature heating to make wax out of the shell mold, get a complete shell mold.

6、Pouring

Casting is the process of casting the shell mold after a certain period of time and meet the requirements of the product.

Because the shell mold needs to be sintered at high temperature, and the external size of the product is strict, there must be enough room for the selected refractory materials.Temperature and high temperature strength; Good thermal deformation resistance, good air permeability, good thermal stability, low thermal expansion coefficient,Chemical reactions should not occur with liquid metals.

7、Shot blasting

The main purpose is to remove the surface shell mold of the casting.

After the completion of investing casting, appropriate processing machinery is selected to process the parts.