Curing agent for inorganic phosphate binder precoated sand and application thereof

A technology of inorganic phosphate and binder, which is used in casting molding equipment, molds, cores, etc., can solve the problems of insufficient strength and poor fluidity, and achieve the effect of improving fluidity and good surface safety.
CN112453314AActive Publication Date: 2021-03-09保定保蒙新型材料科技有限公司
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Patent Information

Authority / Receiving Office
CN · China
Patent Type
Applications(China)
Current Assignee / Owner
保定保蒙新型材料科技有限公司
Publication Date
2021-03-09

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Abstract

The invention discloses a curing agent for inorganic phosphate binder precoated sand. The curing agent for the inorganic phosphate binder precoated sand comprises the following components: 2 to 6 parts of coupling agent; 25 to 40 parts of a phosphate binder; 2 to 6 parts of an organic weak acid aqueous solution; 25 to 30 parts of crystalline hydrate; and 30 to 50 parts of PVP coated magnesia powder. According to the curing agent for the inorganic phosphate binder precoated sand provided by the invention, the inorganic phosphate binder and the crystalline hydrate are attached to the surfaces ofsand grains, hot air is introduced to enable the binder to be dried, the crystalline hydrate is wrapped in the binder, dry precoated sand is obtained, and the dry precoated sand has excellent flowability; and after sand shooting, the hydrate is decomposed into water molecules through mold heating so as to wet the binder, and the wetting binder and the sand grains are bonded and formed with each other and then rapidly cured to form strength.
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Description

technical field

[0001] The invention relates to the technical field of phosphate binder sand casting, in particular to a curing agent for inorganic phosphate binder coated sand and an application thereof. Background technique

[0002] With the increasingly stringent environmental protection supervision and the awakening of people's awareness of environmental protection, the environmental pollution caused by traditional organic resin coated sand cannot be ignored. The problem is not ideal in practical application. It is imminent to seek a new type of inorganic binder that can replace traditional organic resin sand.

[0003] Phosphate binder is a green casting binder with low curing temperature, good heat resistance, small gas generation, good high temperature collapsibility, good reusability, simple process and low cost. It is a very Modeling materials with application value and application prospect. At present, the curing methods of phosphate binder sand mainly include he...

Claims

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