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Aluminum alloy pressure casting oil base parting agent and preparing method thereof

A technology of aluminum alloy and parting agent, which is applied in the direction of casting molding equipment, casting molds, casting mold components, etc., can solve the problems of not being able to adapt to the increasingly complex shapes of die castings, and achieve reduced friction coefficient, reduced wear, and reduced intermetallic bite The effect of welding

Inactive Publication Date: 2018-03-13
安徽金兰压铸有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] Coatings such as graphite oil or asphalt are commonly used parting agents in the existing aluminum alloy die-casting process, which can no longer meet the needs of increasingly complex shapes and higher quality requirements for die-casting parts

Method used

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Experimental program
Comparison scheme
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preparation example Construction

[0023] A preparation method of an aluminum alloy die-casting oil-based mold release agent, comprising the following steps:

[0024] a. Move the polyethylene into the dryer and dry at 50°C for 30 minutes;

[0025] b. After the polyethylene is dried, add engine oil and heat it up;

[0026] c. Add aluminum silver paste and stearic acid in order to dilute after hot-melting polyethylene;

[0027] d, natural cooling.

Embodiment 1

[0029] a. Take 25kg of polyethylene and move it into the dryer, and dry it at 50°C for 30min;

[0030] b. Heat 69.5kg of 40# engine oil, add dry polyethylene to the engine oil and heat it;

[0031] c. Add 5kg of graphite and 0.5kg of stearic acid and stir to dilute the polyethylene after melting;

[0032] d, natural cooling.

Embodiment 2

[0034] a. Take 35kg of polyethylene and move it into the dryer, and dry it at 50°C for 30min;

[0035] b. Heat 53.5kg of 40# engine oil, add dry polyethylene to the engine oil and heat it up;

[0036] c. Add 10kg of graphite and 1.5kg of stearic acid respectively after hot melting the polyethylene and stir to dilute;

[0037] d, natural cooling.

[0038] The invention uses the by-product oligomer produced by Nanjing Chengfu Plastic Industry Co., Ltd. as a raw material. It has low melting point, good dispersibility and low cost.

[0039] Adding the polyethylene of the present invention to an organic solution at a certain temperature can form a suspended or dispersed state and be easily emulsified, which is convenient for uniform spraying or brushing on the die-casting cavity, and maintains a good oil film. It can be used for zinc alloys and aluminum alloys. Get a good typing effect. Adding polyethylene oligomers to die-casting coatings can increase the viscosity of the coat...

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PUM

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Abstract

The invention discloses an aluminum alloy pressure casting oil base parting agent. The aluminum alloy pressure casting oil base parting agent comprises, by weight, 25%-35% of polyethylene, 5%-10% of graphite or aluminum paste, 0.5%-1.5% of stearic acid and the balance 40# engine oil. A preparing method of the aluminum alloy pressure casting oil base parting agent comprises the following steps thata, the polyethylene is transferred into a drying machine, and drying is carried out for 30 min at 50 DEG C; b, the polyethylene is dried and then added into the engine oil for hot melting; c, the aluminum paste and the stearic acid are sequentially added after the polyethylene is subject to hot melting, and stirring and attenuation are carried out; and d, natural cooling is carried out to obtainthe aluminum alloy pressure casting oil base parting agent. Production practices are carried out, the casting yield is improved after the aluminum alloy pressure casting oil base parting agent is used, the operation environment is obviously improved, corrosion phenomena in the casting storage process are eliminated, and costing cost is saved.

Description

technical field [0001] The invention relates to the field of mechanical hardware processing, in particular to an aluminum alloy die-casting oil-based mold release agent. Background technique [0002] In the aluminum alloy die-casting process, the liquid metal interacts with the paint on the cavity to generate carbides that adsorb on the surface of the casting and form spots, which affect the appearance quality of the casting. Therefore, the selected coating should pay attention to its composition, and it is required to only release the least gas during carbonization, and strictly control the accumulation and inclusions. At the same time, pay attention to the influence of coating uniformity and mold temperature on coating volatilization during the process. Variations in coating uniformity and mold temperature can also cause differences in coating volatilization rates. For this reason, the choice of paint should be selected correctly according to the type of die-casting alloy...

Claims

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Application Information

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IPC IPC(8): B22C3/00B22D17/00
CPCB22C3/00B22D17/00
Inventor 何明华
Owner 安徽金兰压铸有限公司