Full-mold casting method of resin sand without dead head

A technology of solid mold casting and resin sand, which is applied in the direction of casting molding equipment, molds, cores, etc., can solve the problems of increasing the labor intensity of the staff, the difficulty of grinding and cleaning the riser, and increasing the production cost, so as to achieve the benefit of the environment The effects of protection, easy filling of molds, and reduction of labor intensity

Inactive Publication Date: 2014-03-19
BOTOU DONGJIAN CASTING
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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

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  • Full-mold casting method of resin sand without dead head

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Embodiment Construction

[0024] Below in conjunction with embodiment the present invention is described in further detail:

[0025] A riser-free resin sand solid mold casting method includes the steps of making pattern and pouring system, modeling, smelting and pouring, molding sand cleaning and the like. In this embodiment, the full mold casting method of machine tool castings is taken as an example. The finished shape of the machine tool castings is a cuboid frame with a length of 15m, a width of 3.2m and a height of 2.1m, and the weight of the casting is 83t.

[0026] According to the pattern of the finished casting, the pattern is the same as the shape of the finished casting, and an appropriate machining allowance is set on the processing surface of the finished casting. The machining allowance set in this embodiment is 20mm. In order to ensure the quality of the casting product, when making the pattern, the upper surface of the pattern is preset with a certain thickness of machining allowance fo...

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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

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Claims

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Application Information

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Owner BOTOU DONGJIAN CASTING
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