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Adhesive and its preparation method and application, coated sand shell type and its preparation method

A technology of adhesive and coated sand, which is applied in the direction of cores, casting molds, molding machines, etc., can solve the problems that the shell or shell core cannot be assembled, the quality of castings is greatly affected, and the production efficiency is not high. Good performance, conducive to industrial scale production and popularization and application, and the effect of improving production efficiency

Active Publication Date: 2021-02-02
CHENGDE BEIYAN CASTING MATERIAL
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  • Summary
  • Abstract
  • Description
  • Claims
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AI Technical Summary

Problems solved by technology

In this way, the production efficiency is not high, and the shell shape will be deformed due to the structure, and the shell shape or shell core with a large amount of deformation will be scrapped because it cannot be assembled.
If the overall shell shape or shell core after bonding has been deformed, it will have a great impact on the quality of the casting after casting, and even be scrapped due to the out-of-tolerance product size, resulting in greater economic losses.
[0004] In addition, the shell or shell core bonded with the existing adhesive needs to be placed naturally for more than 24 hours after bonding, and the adhesive can be used after the adhesive is firmly bonded and completely dried, otherwise it will crack due to insufficient strength Or not completely dry and "choke fire", leading to quality problems of casting defects or even scrapping

Method used

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  • Adhesive and its preparation method and application, coated sand shell type and its preparation method
  • Adhesive and its preparation method and application, coated sand shell type and its preparation method
  • Adhesive and its preparation method and application, coated sand shell type and its preparation method

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[0051] In order to overcome the imperfections of the prior art, the present invention provides an adhesive and its preparation method and application, a film-coated sand shell and its preparation method, so as to alleviate the problems of the bonded integral shell or shell core in the prior art. The problem of deformation occurs, which improves the quality of the coated sand shell mold or shell core, and the dimensional accuracy of the product is high, thereby ensuring the quality of the final casting and improving economic benefits.

[0052] Although there are relevant reports on using phenolic resins as adhesives in the prior art, it has not been found that thermoplastic phenolic resins, epoxy resins, and starch are used as adhesives, nor have they been found to include thermoplastic phenolic resins, epoxy resins, etc. Reports on the application of binders with starch in the manufacture of coated sand cores or castings. Therefore, the present invention creatively proposes an...

Embodiment 1

[0155] An adhesive, mainly prepared from the following raw materials in parts by mass:

[0156] 68 parts of thermoplastic phenolic resin, 14 parts of epoxy resin and 18 parts of starch.

Embodiment 2

[0158] An adhesive, mainly prepared from the following raw materials in parts by mass:

[0159] 73 parts of thermoplastic phenolic resin, 12 parts of epoxy resin and 15 parts of starch.

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Abstract

The invention provides an adhesive, a preparation method and application thereof, a film-coated sand shell mold and a preparation method thereof, and relates to the technical field of film-coated sand shell molds. The adhesive of the present invention is mainly prepared from the following raw materials in parts by mass: 50-90 parts of thermoplastic phenolic resin, 3-18 parts of epoxy resin and 6-30 parts of starch. The invention can avoid the deformation of the coated sand mold core after bonding, improve the quality of the coated sand shell mold or shell core, ensure the dimensional stability, and further improve the dimensional accuracy of the casting. The invention has the characteristics of time saving, labor saving, high efficiency, high product quality and fast bonding speed.

Description

technical field [0001] The invention belongs to the technical field of film-coated sand shells, and in particular relates to an adhesive, a preparation method and application thereof, a film-coated sand shell and a preparation method thereof. Background technique [0002] In the foundry industry, a coated sand casting material is widely used. The coated sand has high bonding strength, is especially suitable for manufacturing shell molds or shell cores, and is easy to store. It is suitable for high dimensional accuracy, The mass production of cast steel, cast iron and non-ferrous alloy castings with low surface roughness has become more and more widely used in recent years. [0003] In the prior art, the main components of adhesives or sealing pastes used in the manufacture of film-coated sand shells or shells are generally clay, starch, or glass water, and there are also adhesives that use phenolic resins. However, whether it is ordinary sand casting or special casting, due...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B22C1/02B22C1/22B22C9/02B22C13/08
CPCB22C1/02B22C1/2253B22C1/226B22C9/02B22C13/08
Inventor 张振朋韩冰韩继磊韩海涛胡玉海静国帅
Owner CHENGDE BEIYAN CASTING MATERIAL
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