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Two box shaping and locating method of self setting resin sand for casting

A technology of casting resin and positioning method, which is used in casting molding equipment, mold boxes, manufacturing tools, etc., can solve the problem of inability to meet the production requirements of single-piece and small batches, the defect of casting wrong box has not been improved, and the manufacturing cycle of casting tooling can be solved. long and other problems, to achieve the effect of eliminating wrong type defects, easier control of process conditions, and high production efficiency

Inactive Publication Date: 2005-06-01
CHANGAN AUTOMOBILE (GRP) CO LTD
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  • Summary
  • Abstract
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AI Technical Summary

Problems solved by technology

Compared with ordinary sand casting, the dimensional accuracy of castings can be improved by 2 to 3 grades, but the defect of casting mismatch is not improved compared with ordinary sand casting
The reason is that the scribing method is adopted for the positioning of the box, and the scribing accuracy can be affected by the scribing tool, the width of the line drawn, the flatness of the side of the sand box (type) and the operator. Influenced by the visual error, the positioning error of the combined box is large, which eventually leads to the wrong box
[0003] The defect of casting wrong box can be solved by using special sand box, but the manufacturing cycle of casting tooling is long, the one-time cost investment is high, and the production cost is expensive, which cannot meet the production requirements of single piece and small batch

Method used

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  • Two box shaping and locating method of self setting resin sand for casting
  • Two box shaping and locating method of self setting resin sand for casting
  • Two box shaping and locating method of self setting resin sand for casting

Examples

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Embodiment Construction

[0015] Positioning blocks with different diameters and heights can be selected according to the shape of the casting. The structure of the positioning block is as follows: figure 1 , figure 2 as shown, figure 1 is a hemispherical positioning block, figure 2 It is a tapered positioning block, you can choose one, follow the steps below:

[0016] 1. Make the upper half mold of resin sand: put the casting model and the positioning block on the modeling plate respectively, put on the sand box, generally put the two positioning blocks on the diagonal line in the sand box, fill the resin sand to make Resin sand upper half mold;

[0017] 2. Take out the positioning block: After the sand mold is solidified, turn over the box and take out two independent positioning blocks, which form two concave shapes on the mold;

[0018] 3. Make resin sand lower half mold: Put the sand box on the upper half mold, fill resin sand to make the lower half mold, after the sand mold is solidified, t...

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Abstract

The present invention is two-box molding and locating cast method with no-bake resin sand. The two independent locating blocks are first set on molding plate to mold, and after the no-bake resin sand is cured, the two locating blocks are taken out from turned box. The notched shape in the sand mold is utilized to copy the corresponding raised shape in the other half of sand mold. After no-bake resin sand cures, the upper and the lower half molds have the same outer contour for location accurately. The present invention has simple structure, convenient operation, low cost and high casting precision.

Description

technical field [0001] The invention belongs to the technical field of casting, and specifically relates to a positioning method for two-box molding of resin self-setting sand for casting, which is used for casting production of two-box molding of resin self-setting sand. Improve the dimensional accuracy of castings. technical background [0002] The dimensional accuracy of castings produced by ordinary sand casting is low. In order to improve the dimensional accuracy of castings, more and more manufacturers gradually adopt resin self-setting sand casting for production. The looseness is small, and the dimensional accuracy of the cavity is high, so the dimensional accuracy of the casting can be well controlled. Compared with ordinary sand casting, the dimensional accuracy of castings can be improved by 2 to 3 grades, but the defect of casting mismatch has not been improved compared with ordinary sand casting. The reason is that the scribing method is adopted for the positi...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B22C21/10
Inventor 卢行乐辜志明闫拥军
Owner CHANGAN AUTOMOBILE (GRP) CO LTD
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