Production method for preventing evaporative pattern casting deformation

A production method and technology of lost foam, applied in the direction of casting molds, casting mold components, casting molding equipment, etc., can solve problems such as failure to overcome, shape vibration deformation, cleaning difficulties, etc., and achieve easy cleaning, convenient support and handling, high-dimensional The effect of precision

Active Publication Date: 2014-01-15
KOCEL EQUIP
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AI Technical Summary

Problems solved by technology

However, the actual operation found that the molding process is cumbersome, and if the support frame and the pattern are not properly matched, the pattern will be damaged, causing the pattern to vibrate and deform. Moreover, for particularly complex parts, the support frame is difficult to clean after the casting is boxed, which increases the cleaning difficulty. ;3) Using lost foam stretching: following the idea of ​​wood mold reinforcement, we try to use lost foam stretching to increase the s

Method used

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Experimental program
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Embodiment Construction

[0020] A production method for preventing deformation of lost foam castings, the method comprising the steps of:

[0021] a. Design tendons: The tendons are made of wood, with a thickness of 15mm-25mm and a width of 2-3 times the thickness;

[0022] b. Bonding: Bond the above-mentioned tie bars to the fixed pattern clusters and the easily deformable parts of the lost foam, first apply hot melt glue to the middle of the tie bars, quickly fix the tie bars, and then apply cold glue to the edge of the tie bars;

[0023] c. Modeling: Put the pattern cluster after overall flow coating and drying into the sand box, and vibrate while adding sand. Between 30 ~ 50HZ, the amplitude is 0.5mm ~ 1.5mm;

[0024] d. Melting and pouring: the melting and pouring temperature range is 1360-1420°C, which is determined according to the wall thickness of the casting;

[0025] e. Boxing: after boxing, clean up the carbon black in the corresponding parts.

[0026] The tie rods are bamboo boards or ...

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Abstract

The invention relates to an evaporative pattern casting method and in particular relates to a production method for preventing evaporative pattern casting deformation. The production method is characterized by comprising the following steps: designing a tie bar, adhering, modeling, smelting and casting, and mold dismantling. The method is unique, the product yield is improved, the production cost is reduced, iron liquid filling is not influenced, and the casting quality is guaranteed.

Description

technical field [0001] The invention relates to a casting method of lost foam, in particular to a production method for preventing deformation of lost foam castings. Background technique [0002] Lost foam casting has the advantages of short cycle, saving wood, reducing labor intensity, and reducing production costs. It plays an excellent role in the casting production of small batches, especially large pieces and complex cavities. However, due to the poor strength of EPS materials, Castings are easily deformed during the process of transportation, coating, drying, and molding, resulting in casting size problems. Especially for large castings, the size problems caused by deformation account for more than 30% of waste products. Therefore, the lost foam casting must first solve the deformation problem. [0003] The so-called lost foam casting deformation refers to: the geometric shape of the casting after pouring does not match the pattern, such as bending, depression, ellips...

Claims

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Application Information

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IPC IPC(8): B22C9/04B22C9/12B22C23/02
Inventor 杨争光杜文强原晓雷徐国强张守全张俊勇周文军安少妮马秉平
Owner KOCEL EQUIP
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