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Casting method of die casting

A die-casting and die-casting technology, which is applied in the field of die-casting, can solve the problems of strength and stability that cannot meet the requirements of large-scale die-castings, and achieve good thermal stability, anti-erosion and oxidation resistance, and excellent heat storage capacity. , to ensure the quality of the effect

Active Publication Date: 2018-11-20
安徽振立汽车配件有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

In recent years, with the continuous development of die-casting technology, die-casting parts have become larger and more complex in structure, and the quality requirements for die-casting coatings have become higher and higher. The requirements for base coatings are getting higher and higher, but the strength and stability of the existing water-based coatings on the die-casting mold cannot meet the requirements of large-scale die-castings, and continuous improvement is needed

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  • Casting method of die casting
  • Casting method of die casting

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preparation example Construction

[0025] The preparation method of described die-casting mold coating comprises the following steps:

[0026] (1) Mix mullite powder and low-melting-point glass powder to obtain mixed powder, then add an aqueous solution of carbon source to the mixed powder, stir and mix and heat up to 60-90°C, so that mullite powder and low-melting-point glass powder Disperse evenly to obtain a mixed slurry;

[0027] (2) Continue to stir the mixed slurry in step (1), dry at 90-100°C to obtain mullite powder and low-melting-point glass powder containing the cladding layer, and then in a vacuum atmosphere, dry at 400-500 Carbonization at ℃ to obtain carbon-coated mullite powder and low-melting glass powder;

[0028] (3) Take the inorganic binder according to the formula quantity, then disperse it into deionized water, then add the carbon-coated mullite powder and low-melting glass powder and magnesium oxide prepared in step (2) successively, and stir at a high speed to make The mixture is evenl...

Embodiment 1

[0045] A kind of coating for die-casting mold, the raw material composition that is used to prepare described coating for die-casting mold comprises the raw material of following weight portion: Mullite powder (300 orders) 53 parts, glutinous rice starch 10 parts, low-melting point glass powder (purchased from Guangzhou Geliner New Material Co., Ltd., brand D240) 13 parts, magnesium oxide (300 mesh) 24 parts, water glass 38 parts, deionized water 90 parts.

[0046] The preparation method of described coating comprises the following steps:

[0047] (1) Mix mullite powder and low-melting-point glass powder to obtain a mixed powder, then add glutinous rice starch aqueous solution (mass fraction 20%), stir and mix and heat up to 80°C, so that the mullite powder and low-melting-point glass powder are evenly dispersed , to obtain a mixed slurry;

[0048] (2) Continue to stir the mixed slurry in step (1), and dry at 90°C to obtain mullite powder and low-melting glass powder containi...

Embodiment 2

[0051] A kind of coating for die-casting mold, the raw material composition that is used to prepare described coating for die-casting mold comprises the raw material of following weight portion: Mullite powder (300 orders) 50 parts, glutinous rice starch 8 parts, low-melting point glass powder (purchased from Guangzhou Geliner New Material Co., Ltd., brand D240) 12 parts, magnesium oxide (300 mesh) 22 parts, water glass 35 parts, deionized water 85 parts.

[0052] The preparation method of described coating comprises the following steps:

[0053] (1) Mix mullite powder and low-melting-point glass powder to obtain a mixed powder, then add glutinous rice starch aqueous solution (mass fraction 20%), stir and mix and heat up to 80°C, so that the mullite powder and low-melting-point glass powder are evenly dispersed , to obtain a mixed slurry;

[0054] (2) Continue to stir the mixed slurry in step (1), and dry at 90°C to obtain mullite powder and low-melting glass powder containin...

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Abstract

The invention belongs to the technical field of casting and particularly relates to a casting method of a die casting. The casting method of the die casting comprises firstly, burdening is performed,raw materials are weighed according to the composition of the casting, and are subjected to melting, thinning and refining in a smelting furnace, components are adjusted, and an alloy in a molten state is obtained; secondly, a die is prepared, and according to the shape of the to-be-casted casting, the metal die is prepared, the die is preheated to 80-120 DEG C, then is placed in coating for a die-casting die to be subjected to dip-coating, and then is transferred into the temperature of 60-80 DEG C for drying; and thirdly, the die prepared in the step (2) is preheated to 300-350 DEG C, the alloy in the molten state in the step (1) is casted into the preheated die, die-casting molding is performed, and the casting is obtained. In the casting method, the coating, after being improved, for the die-casting die has good heat stability and scouring oxidizing resisting capacity under scouring of high-temperature metal liquid, and therefore it is guaranteed that the die-casting die, for dip-coating of the coating, provided by the casting method has good casting capacity, it is avoided that various defects occur on the casting surface, and the quality of the casting is guaranteed.

Description

technical field [0001] The invention belongs to the technical field of casting, and in particular relates to a casting method of a die casting. Background technique [0002] Die casting is a kind of filling liquid or semi-solid metal or alloy, or liquid metal or alloy containing reinforced phase, into the cavity of die-casting mold at a high speed under high pressure, and make the metal or alloy under pressure A casting method that solidifies to form a casting. The common pressure of die-casting is 4-500Mpa, and the metal filling speed is 0.5-120m / s. Therefore, high pressure and high speed are the fundamental differences between die-casting and other casting methods. [0003] In the die-casting process, in order to avoid welding of castings and die-casting molds, reduce the friction resistance of casting ejection and avoid excessive heating of die-casting molds, coatings are used. The general requirements for coatings include: 1) good lubricity at high temperatures; 2) The...

Claims

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Application Information

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IPC IPC(8): B22D17/00B22C3/00
CPCB22C3/00B22D17/00
Inventor 于会明
Owner 安徽振立汽车配件有限公司