Preparation method of special inorganic anti-veining additive for casting

An additive and veining technology, used in casting molding equipment, metal processing equipment, casting molds, etc., can solve the problems of large weakening of sand mold strength, poor anti-veining effect, and high casting cost, so as to prevent casting veining. Defects, good anti-veining effect, effect of reducing production cost

Active Publication Date: 2015-04-08
共享新材料(山东)有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] Although the veining defect can be improved by replacing silica sand with pearl sand and the like to inhibit its phase transformation expansion, pearl sand is much more expensive than silica sand, and the casting cost is too high; and the addition of traditional inorganic anti-veining additives

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0019] Embodiment one: a kind of preparation method of special inorganic anti-veining additive for casting, the method comprises the following steps:

[0020] a. Sieve iron oxide red and iron oxide black with a 70-mesh sieve respectively, discard the sieve, and keep the sieve residue for subsequent use;

[0021] b. Sieve the spodumene, kyanite, and hollow microspheres with a 30-mesh sieve respectively, discard the sieve, and keep the sieve residue for subsequent use;

[0022] c. Weigh 340 kg of sieved iron oxide red, 260 kg of iron oxide black, 150 kg of spodumene, 90 kg of kyanite, and 80 kg of hollow microspheres, weigh 50 kg of lithium carbonate, and 30 kg of potassium carbonate. Mixing equipment, and then turn on the stirring for mixing, after the mixing is completed, the material is discharged.

Embodiment 2

[0023] Embodiment two: a kind of preparation method of special inorganic anti-veining additive for casting, the method comprises the following steps:

[0024] a. Sieve iron oxide red and iron oxide black with a 70-mesh sieve respectively, discard the sieve, and keep the sieve residue for subsequent use;

[0025] b. Sieve the spodumene, kyanite, and hollow microspheres with a 30-mesh sieve respectively, discard the sieve, and keep the sieve residue for subsequent use;

[0026] c. Weigh 300 kg of sieved iron oxide red, 280 kg of iron oxide black, 180 kg of spodumene, 80 kg of kyanite, and 100 kg of hollow microspheres, weigh 40 kg of lithium carbonate, and 20 kg of potassium carbonate. Mixing equipment, and then turn on the stirring for mixing, after the mixing is completed, the material is discharged.

Embodiment 3

[0027] Embodiment three: a kind of preparation method of casting special inorganic anti-veining additive, this method comprises the following steps:

[0028] a. Sieve iron oxide red and iron oxide black with a 70-mesh sieve respectively, discard the sieve, and keep the sieve residue for subsequent use;

[0029] b. Sieve the spodumene, kyanite, and hollow microspheres with a 30-mesh sieve respectively, discard the sieve, and keep the sieve residue for subsequent use;

[0030] c. Weigh 400 kg of sieved iron oxide red, 250 kg of iron oxide black, 120 kg of spodumene, 100 kg of kyanite, 60 kg of hollow microspheres, weigh 30 kg of lithium carbonate, and 40 kg of potassium carbonate. Mixing equipment, and then turn on the stirring for mixing, after the mixing is completed, the material is discharged.

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Abstract

The invention relates to a preparation method of an additive, and in particular relates to a preparation method of a special inorganic anti-veining additive for casting. The method comprises the following steps: respectively sieving iron oxide red and black iron oxide through a sieve of 70mesh; removing oversize materials and remaining the residues on the sieve for later use; respectively sieving spodumene, kyanite and hollow microspheres through a sieve of 30mesh; removing oversize materials and remaining the residues on the sieve for later use; sequentially feeding the sieved raw materials, potassium carbonate and lithium carbonate into a special agitating device according to a technical formula; then starting to agitate for mixing; discharging after mixing. The special inorganic anti-veining additive has the advantages that the addition quantity is small, the influence on the strength of moulding sand is low, the anti-veining effect is good, and the production cost can be effectively decreased.

Description

technical field [0001] The invention relates to a preparation method of an additive, in particular to a preparation method of a special inorganic anti-veining additive for casting. Background technique [0002] When producing automobile cylinder blocks and cylinder heads, thin burrs or veining defects often appear in the intake and exhaust passages, the inner cavity of the water jacket, and the inner corners of the heat joints. Because the burrs are located in the inner cavity, it is difficult to clean, and the veins in the water jacket cavity Defects will hinder the normal flow of cooling water, and in severe cases, the engine will burn; the veins in the intake and exhaust passages will affect the vortex characteristics of the air passage, and seriously affect the performance of the engine. is crucial. [0003] The root cause of the veining defects on the casting surface is the cracking of the sand mold caused by the expansion of silica sand at 573°C. At a temperature of ...

Claims

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Application Information

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IPC IPC(8): B22C1/02
CPCB22C1/02
Inventor 陈学更王娟娟韩文
Owner 共享新材料(山东)有限公司
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