Production technology for precoated sand recycling

A production process and technology of coated sand, which is applied in the direction of manufacturing tools, metal processing equipment, casting molding equipment, etc., can solve the problems of sand agglomeration, affecting the effect of roasting and coating effect, etc., to avoid sand agglomeration and strengthen the market Value, the effect of saving production costs

Active Publication Date: 2015-11-25
TAIZHOU CHENS COPPER
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  • Abstract
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  • Claims
  • Application Information

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Problems solved by technology

However, for the regeneration of coated sand with ferrous sulfate added, since the ferrous sulfate in the resin melts at high temperature, the sand will agglomerate in the case of direct calcination, which will affect the roasting effect and subsequent film effect

Method used

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  • Production technology for precoated sand recycling
  • Production technology for precoated sand recycling

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Embodiment Construction

[0027] Reference Figure 1 to Figure 2 The embodiment of the production process of recycled coated sand of the present invention will be further described.

[0028] A production process for the recycling of coated sand, replacing the black sand originally used in the production of sandboxes with coated sand. The coated sand is the molding sand whose surface is covered with a solid resin film. The coated sand has good dispersibility, The shell type does not have a layer, has good thermal stability, good fluidity, and the surface of the processed casting is smooth. Moreover, its high temperature resistance and good release properties make it very suitable for the production of sand boxes.

[0029] Its recycling needs to go through the following steps:

[0030] Step 1: Inject the coated sand into a sand box through a core shooter. The core shooter uses compressed air to evenly inject the molding sand into the pre-mold of the sand box for compaction. The dimensional accuracy of the san...

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Abstract

The invention discloses a production technology for precoated sand recycling. According to the technical scheme, the production technology for precoated sand recycling is characterized in that waste precoated sand is recycled through crushing, multi-time screening, NaOH solution immersing, roasting, cooling, heating, mixing stirring, filtering, sand injecting and other technologies, and the precoated sand can be repeatedly recycled; and the circulation cost is very low, accordingly, the environment is protected, and resource waste is avoided.

Description

Technical field [0001] The invention relates to a production process for recycling coated sand. Background technique [0002] At present, when most enterprises produce copper castings, the production process is mostly: after the copper block is melted into liquid copper, the liquid copper is poured into a sand box with a fixed shape to cool the finished product, and then the Open the sand box and take out the copper castings inside, so that the processing of the entire copper casting is completed. [0003] In the existing production technology, the processing sand box usually puts the sand in a special box with a core pressure in the middle, and then discards it after use, which will cause a lot of waste of resources, and It is also more troublesome and complicated to process the molding sand box. Therefore, the recycling of waste sand is of great significance both in terms of social and economic benefits. [0004] Existing studies have shown that adding ferrous sulfate during the...

Claims

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Application Information

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IPC IPC(8): B22C9/00
Inventor 陈健
Owner TAIZHOU CHENS COPPER
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