Full-mold casting method of resin sand without dead head

Abstract

The invention discloses a full-mold casting method of resin sand without a dead head. The full-mold casting method comprises the steps of manufacturing a pattern and a casting system, molding, smelting casting, forming and cleaning, wherein working allowance is preset on the upper surface of the manufactured pattern, and no dead head is arranged in the molding step; the casting system comprises a plurality of sprues with funnel-shaped pouring cups at the top ends, the volume of the pouring cup is more than that of the sprue, the bottom of the sprue is communicated with a cross gate, the lower end surface of the cross gate is leveled with the bottom surface of the pattern or is slightly higher than the bottom surface of the pattern, the length of the cross gate is 95% of the length of the pattern, and a plurality of ingates communicated with the pattern are arranged on the cross gate at intervals; and molten metal is poured by the plurality of pouring cups simultaneously during casting, and the speed of filling the molten liquid into each pouring cup can ensure the molten liquid in the pouring cup to close the sprues. According to the full-mold casting method, no dead head is arranged, no flue gas and no pollution are caused during production, the production steps are simplified and the cost is reduced.

Description

technical field [0001] The invention relates to a casting process method, in particular to a full mold casting process method. Background technique [0002] Full mold casting is to use polystyrene foamed plastic to replace the ordinary shape. After the mold is made, the molten metal is directly poured without taking out the pattern. The space position occupied, the casting method to obtain the required casting after cooling and solidification. [0003] The production process of full mold casting is generally as follows: 1) Making the pattern and pouring system: polystyrene foam plastic is used to make the pattern and pouring system. The pattern is basically consistent with the casting entity and has a certain thickness of machining allowance. Design; 2) Modeling: match and combine the pattern with the prefabricated gating system, and fix several riser models on the pattern, and coat the surface of the pattern, gating system and riser model; The combination of the pouring s...

AI Technical Summary

Problems solved by technology

The riser can prevent defects to a certain extent, but cutting the riser requires a lot of energy consumption, and it is difficult to polish and clean the riser, which increases the labor intensity of the staff

At the same time, during the pouring process, the outside air enters the mold cavity from the riser to make the pattern burn and gasify at high temperature, and the smoke generated causes serious environmental pollution.

With the continuous improvement of environmental protection requirements, it is necessary to invest a lot of money to ensure that production meets environmental protection requirements, which increases production costs and limits the further development of enterprises

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