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EPC disappearing die casting iron coating

A technology of lost foam casting and coating, which is applied in the direction of coating, casting mold, casting mold composition, etc. It can solve the problems of low strength, easy to be corroded by strong alkali, low air permeability, etc., so as to prolong the service life and avoid drying and cracking , increase the effect of air permeability

Inactive Publication Date: 2018-11-20
曹博海
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

In the prior art, the lost foam cast iron coating is easy to dry and crack, and is easily corroded by strong alkali, with low air permeability and low strength.

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0020] A kind of EPC lost foam cast iron coating, configure 100kg of EPC lost foam cast steel coating, including the following raw materials: 32.2kg of quartz sand, 32.2kg of bauxite, 1.92kg of bentonite, 1.0kg of attapulgite, 0.12kg of CMC, hexametaphosphoric acid Sodium 1.3kg, sodium carbonate 0.05kg and water 31.2kg.

[0021] A kind of preparation method of described EPC lost foam cast iron coating, comprises the following steps:

[0022] S1: Weigh the quartz sand according to the ratio, and divide the quartz sand into 5.5% A component, 43% B component, 46% C component and 4.5% D component according to the weight percentage, and then divide the four groups The divided quartz sand is crushed and ground separately, and different particle sizes are formed after grinding;

[0023] S2: Take the bauxite according to the ratio, and divide the bauxite into 14% E component, 19% F component, 23% G component and 44% H component according to the weight percentage, and then divide the ...

Embodiment 2

[0031] An EPC lost foam cast iron coating, equipped with 100kg of EPC lost foam cast steel coating, including the following raw materials: 41.78kg of quartz sand, 28.2kg of bauxite, 1.42kg of bentonite, 0.5kg of attapulgite, 0.07kg of CMC, hexametaphosphoric acid Sodium 0.8kg, sodium carbonate 0.02kg and water 27.2kg.

[0032] A kind of preparation method of described EPC lost foam cast iron coating, comprises the following steps:

[0033] S1: Weigh the quartz sand according to the ratio, and divide the quartz sand into 5.5% A component, 43% B component, 46% C component and 4.5% D component according to the weight percentage, and then divide the four groups The divided quartz sand is crushed and ground separately, and different particle sizes are formed after grinding;

[0034] S2: Take the bauxite according to the ratio, and divide the bauxite into 14% E component, 19% F component, 23% G component and 44% H component according to the weight percentage, and then divide the fo...

Embodiment 3

[0042] A kind of EPC lost foam cast iron coating, configure 100kg of EPC lost foam cast steel coating, including the following raw materials: 22.62kg of quartz sand, 36.2kg of bauxite, 2.42kg of bentonite, 1.5kg of attapulgite, 0.17kg of CMC, hexametaphosphoric acid Sodium 1.8kg, sodium carbonate 0.08kg and water 35.2kg.

[0043] A kind of preparation method of described EPC lost foam cast iron coating, comprises the following steps:

[0044] S1: Weigh the quartz sand according to the ratio, and divide the quartz sand into 5.5% A component, 43% B component, 46% C component and 4.5% D component according to the weight percentage, and then divide the four groups The divided quartz sand is crushed and ground separately, and different particle sizes are formed after grinding;

[0045] S2: Take the bauxite according to the ratio, and divide the bauxite into 14% E component, 19% F component, 23% G component and 44% H component according to the weight percentage, and then divide the f...

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PUM

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Abstract

The invention discloses an EPC disappearing die casting iron coating. The EPC disappearing die casting iron coating comprises quartz sand, bauxite, bentonite, attapulgite clay, CMC, sodium hexametaphosphate, sodium carbonate and water. The preparation method comprises the following steps that the quartz sand is weighed by portion and is ground; the bauxite is weighed by portion and is ground; thebentonite and the attapulgite clay are weighed by portion, and the quartz sand the bauxite, the bentonite and the attapulgite clay are uniformly mixed in an agitator; the CMC, the sodium hexametaphosphate, the sodium carbonate and the water are weighed by portion, and the CMC, the sodium hexametaphosphate and the sodium carbonate are added into a mixture A for stirring and mixing; and an aggregateis added into the mixture, and the weighed water is slowly added when stirring is carried out to obtain the required coating. Hygroscopicity of the coating is high and dry cracking can be avoided. Strong alkali resistance is high, gas permeability is high, intensity is improved, and excellent market prospects are achieved.

Description

technical field [0001] The invention relates to the technical field of lost foam casting coatings, in particular to an EPC lost foam casting cast iron coating. Background technique [0002] Lost foam casting is a full-type casting of foam plastic mold using dry sand without binder combined with vacuum technology. The main names in China are "dry sand solid mold casting", "negative pressure solid mold casting", referred to as EPC casting; lost foam casting is to bond and combine paraffin or foam models similar in size and shape to castings to form model clusters, brushing After the refractory coating is dried, it is buried in dry quartz sand for vibration molding, poured under negative pressure to vaporize the model, and the liquid metal occupies the position of the model, solidifies and cools to form a new casting method. In the prior art, the lost foam cast iron coating is easy to dry and crack, is easily corroded by strong alkali, has low air permeability and low strength...

Claims

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Application Information

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IPC IPC(8): B22C3/00B22C9/04
CPCB22C3/00B22C9/04
Inventor 曹博海缪强
Owner 曹博海
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