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Lost foam coating and preparation method thereof

A technology of lost foam and coating, which is applied in the direction of coating, manufacturing tools, casting and molding equipment, etc. It can solve the problems of increasing the cost of grinding wheel grinding and the coating is not easy to peel off, achieving the best peeling effect, saving labor, and excellent air permeability Effect

Active Publication Date: 2012-12-26
苏州科博尔机床集团有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] However, the quality of the current coatings still has shortcomings in various aspects. For example, in the production of cast steel, after casting cooling, the lost foam coating is not easy to peel off from the casting, which greatly increases the cost of subsequent grinding wheel grinding.

Method used

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  • Lost foam coating and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0022] The ratio of each component of the lost foam coating is: 30 parts by weight of high alumina bauxite clinker, 25 parts by weight of magnesium oxide powder, 1 part by weight of sodium bentonite, 1.5 parts by weight of CMC, 0.5 parts by weight of polyvinyl alcohol, 0.3 parts by weight Parts of phenolic resin, 0.2 parts by weight of n-octanol, 0.5 parts by weight of iron oxide red powder.

[0023] Follow the steps below to prepare lost foam coatings:

[0024] First, mix 1 part by weight of sodium bentonite with 18 parts by weight of water, and stir at a high speed of 1000 rpm or more for 5 hours to form a bentonite slurry; meanwhile, take 30 parts by weight of high alumina bauxite clinker and 25 parts by weight of magnesium oxide powder in the grinding equipment Stir evenly in the medium, add 28 parts by weight of water therein, and stir to make it form aggregate. Then get 1.5 parts by weight of CMC, 0.5 parts by weight of polyvinyl alcohol, 0.3 parts by weight of phenolic...

Embodiment 2

[0028] The ratio of each component of the lost foam coating is: 35 parts by weight of high alumina bauxite clinker, 20 parts by weight of magnesium oxide powder, 2 parts by weight of sodium bentonite, 1 part by weight of CMC, 1 part by weight of polyvinyl alcohol, 0.5 parts by weight Parts of phenolic resin, 0.3 parts by weight of n-octanol, 1 part by weight of iron oxide red powder.

[0029] Follow the steps below to prepare lost foam coatings:

[0030] First, mix 2 parts by weight of sodium bentonite with 20 parts by weight of water, and stir at a high speed above 1000rpm for 6 hours to form a bentonite slurry; meanwhile, take 35 parts by weight of high alumina bauxite clinker and 20 parts by weight of magnesium oxide powder in the grinding equipment Stir evenly in the medium, add 30 parts by weight of water therein, and stir to make it form aggregate. Then get 1 weight part CMC, 1 weight part polyvinyl alcohol, 0.5 weight part phenolic resin, 0.3 weight part n-octanol, 1 w...

Embodiment 3

[0034] The ratio of each component of the lost foam coating is: 40 parts by weight of high alumina bauxite clinker, 15 parts by weight of magnesium oxide powder, 3 parts by weight of sodium bentonite, 0.5 parts by weight of CMC, 1.5 parts by weight of polyvinyl alcohol, 0.8 parts by weight Parts of phenolic resin, 0.4 parts by weight of n-octanol, 1.5 parts by weight of iron oxide red powder.

[0035] Follow the steps below to prepare lost foam coatings:

[0036] First, mix 3 parts by weight of sodium bentonite with 22 parts by weight of water, and stir at a high speed above 1000rpm for 7 hours to form bentonite slurry; meanwhile, take 40 parts by weight of high alumina bauxite clinker and 15 parts by weight of magnesium oxide powder in the grinding equipment Stir evenly in the medium, add 32 parts by weight of water therein, and stir to make it form aggregate. Then get 0.5 parts by weight of CMC, 1.5 parts by weight of polyvinyl alcohol, 0.8 parts by weight of phenolic resin...

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Abstract

The invention relates to a lost foam coating and a preparation method thereof. The coating comprises the following components in parts by weight: 30-40 parts of bauxite clinker, 15-25 parts of magnesium oxide powder, 1-3 parts of sodium-based bentonite, 0.5-1.5 parts of CMC (Carboxyl Methyl Cellulose), 0.5-1.5 parts of polyvinyl alcohol, 0.3-0.8 part of phenol-formaldehyde resin, 0.2-0.4 part of n-caprylic alcohol and 0.5-1.5 parts of red ferric oxide powder. The lost foam coating provided by the invention has an excellent stripping effect and superior permeability, i.e., phenomena of air pores and slag inclusion can be effectively prevented, the quality of a casting is improved, subsequent treatment is simple, and a large amount of labor is saved.

Description

technical field [0001] The invention belongs to the field of casting, in particular to the technical field of production of lost foam cast steel. Background technique [0002] Lost foam casting (also known as solid casting) is to bond and combine foam models similar in size and shape to castings to form a model cluster. After brushing refractory paint and drying, it is buried in dry quartz sand for vibration molding, and poured under negative pressure. , the model is vaporized, the liquid metal occupies the position of the model, solidified and cooled to form a new casting method of castings. [0003] Compared with traditional casting technology, lost foam casting has the following characteristics: 1. Good casting quality and low cost; 2. Unlimited materials and suitable sizes; 3. High dimensional accuracy, smooth surface, and reduced cleaning workload; 4. Internal The defects are greatly reduced and the organization is dense; 5. Large-scale and mass production can be reali...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B22C3/00B22C9/04
Inventor 陈立国
Owner 苏州科博尔机床集团有限公司
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