Pneumatic type casting wax extruding device

Abstract

The invention discloses a pneumatic type casting wax extruding device. The pneumatic type casting wax extruding device comprises a base, a charging barrel, an upper cover, an air inlet pipe, a guide rod, a piston, lifting cylinders, a heating pipe, a thermocouple, a discharging pipe, a cooling sleeve and a controller, wherein the controller controls the lifting cylinders to push the upper cover to move upwards, the piston is pulled out under the limiting action of a limit block, and solid wax materials are fed into the charging barrel; during extrusion, the controller controls the heating pipe to work to heat the wax materials in the charging barrel, the thermocouple detects temperature in real time, when the set temperature is reached, the controller controls the thermocouple to stop working, and then compressed air is pumped into the charging barrel through the air inlet pipe, so that the piston is pushed to move downwards to extrude molten wax from the discharging pipe; meanwhile, the compressed air is pumped into the cooling sleeve through an air inlet joint, then the discharging pipe is cooled, and liquid wax is changed into molten wax. The pneumatic type casting wax extruding device is simple in structure, extrudes the wax materials uniformly and continuously, adopts gas driving and is good in protective performance and low in maintenance cost.

Description

Technical field [0001] The invention relates to a mechanical device, in particular to a pneumatic wax extrusion device for casting. Background technique [0002] Wax mold precision casting is also called lost wax casting or investment casting. The specific casting method is: first make a model of the casting to be made with wax material, and weld the model to the gate rod with the same material to make Module (when the casting is large, it can be a single group). Dip refractory paint (water glass or a mixture of silica sol and fine sand) on the surface of the module, and then sprinkle with refractory sand. (Dipping and sanding must be repeated several times , Make the sand layer thick enough), after it dries and solidifies, heat the module to remove the wax from the gate to form an empty shell. The empty shell is fired to make it a strong mold shell, and the liquid metal is poured from After pouring into the mouth and condensing, it becomes a metal casting. When injecting the w...

AI Technical Summary

Problems solved by technology

When injecting the wax material into the wax mold, it is necessary to melt the wax material first, and then press the wax material into the wax mold. There are two methods for extruding the wax material. Compressed air is pumped into the barrel to increase the pressure inside the barrel, thereby extruding the wax material. The compressed air can easily enter the wax mold with the wax material, causing bubbles and other defects on the surface of the wax mold. The other is The piston connected to the lead screw is driven by a linear motor to extrude the wax. Due to the harsh site environment and the poor protection performance of the lead screw pair, the service life is low and the maintenance cost is high.

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