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Lost-foam casting device

A technology of lost foam and foam model, applied in the field of casting modeling, can solve the problems of low compliance rate and insufficient compactness of castings, and achieve the effect of improving compliance rate and ensuring integrity

Active Publication Date: 2017-02-01
沛县东方铸造有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
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AI Technical Summary

Problems solved by technology

[0004] The present invention intends to provide a lost foam casting device to solve the problem of low compliance rate of castings due to insufficient compactness between the molding sand and the foam model

Method used

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Embodiment Construction

[0014] The present invention will be described in further detail below by means of specific embodiments:

[0015] The reference signs in the drawings of the description include: box body 1 , molding sand 2 , body 3 , rope groove 4 , rubber bag 5 , expansion block 6 , and hanging ring 7 .

[0016] The embodiment is basically as attached figure 1 , figure 2 Shown: a lost foam casting device, including a box 1, molding sand 2 and an elevator sheave-like foam model, the molding sand 2 fills the box 1, the foam model is placed inside the molding sand 2, and the foam model includes a body 3 and Rope groove 4, box body 1 is connected with a filling layer matching rope groove 4 through iron chains, the filling layer includes sand layer and rubber bag 5 from inside to outside, rubber bag 5 is filled with molding sand, and molding sand 2 is filled with rubber bag 5 forms a whole for extruding the sand layer, and the sand layer fills the rope groove 4 to improve the compactness betwee...

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Abstract

The invention discloses a lost-foam casting device which comprises a box body and a foam model, wherein molding sand is arranged in the box body; the foam model is arranged inside the molding sand; the foam model comprises a body and a rope groove; the box body is further equipped with a flexible packing layer matched with the rope groove; a plurality of groups of expanding blocks which are pre-heated to expand are arranged in the molding sand; each group of expanding blocks is opposite to the filling layer; and a supporting rod is arranged between each group of expanding blocks and the box body. According to the scheme adopted by the invention, the lost-foam casting device mainly solves the problem that the rate of reaching the standards of cast pieces is low due to the fact that fit degree between the molding sand the foam model is not high.

Description

technical field [0001] The invention belongs to the field of casting modeling, and in particular relates to a molding sand or a similar casting mold used for molding castings. Background technique [0002] Lost foam casting is a full-type casting of foam plastic molds using binder-free dry sand combined with vacuum technology. It combines foam models similar in size and shape to castings to form model clusters. After brushing and drying refractory coatings, they are buried in Vibration molding in molding sand, pouring under negative pressure, gasification of the model, liquid metal occupying the position of the model, solidification and cooling to form a new casting method of castings. [0003] At present, the compliance rate of the produced castings is low. The main reason is that the fit between the molding sand and the foam model is not high during the casting manufacturing process, especially for the bending parts, grooves and holes of the castings. During the productio...

Claims

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Application Information

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IPC IPC(8): B22C9/04
CPCB22C9/046
Inventor 张海学
Owner 沛县东方铸造有限公司
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