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Casting method of workpiece with partition plate arranged in thin long hole

A technology of slender holes and partitions, which is applied in the direction of casting molding equipment, casting molds, casting mold components, etc., can solve problems such as the qualified rate and precision of out-of-fire castings, improve quality, improve quality and precision, and avoid mutual interference effect

Active Publication Date: 2019-11-29
西安皓森精铸股份有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] Aiming at the above-mentioned problems of running out of fire and the low qualified rate and precision of casting products when the mold is melted, the present invention proposes a casting method for workpieces with partitions in elongated holes, and the method steps are as follows:

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0029] The molding material that the mold in the present embodiment adopts is paraffin, and the casting method steps of its small flow meter are:

[0030] 1) According to the process requirements, form a tree for the mold of the small flowmeter; the process of forming the tree is:

[0031] 1.1) Carry out patrol inspection on all molds and eliminate unqualified products;

[0032] 1.2) Select the die head, remove the deformed, hollow and other incomplete die heads, and modify the modifiable die heads with a knife;

[0033] 1.3) Use the welding method to heat the ingates of the two sets of molds and weld them on the runners, and ensure that the distance between the molds is more than 12 mm.

[0034] 2) Coating and sanding are carried out on the outer surface of the mold after the tree formation, and then drying treatment is carried out, and after the drying treatment, the coating and sanding are carried out again, and the drying treatment is carried out again; the coating, sandi...

Embodiment 2

[0046] The molding material that mold adopts in the present embodiment is plastics, and the casting method step of its small flow meter is:

[0047] 1) According to the process requirements, form a tree for the mold of the small flowmeter; the process of forming the tree is:

[0048] 1.1) Carry out patrol inspection on all molds and eliminate unqualified products;

[0049] 1.2) Select the die head, remove the deformed, hollow and other incomplete die heads, and modify the modifiable die heads with a knife;

[0050] 1.3) Assemble the two sets of molds on the runner by mechanical assembly method, and ensure that the distance between the molds is 10mm.

[0051] 2) Coating and sanding are carried out on the outer surface of the mold after the tree formation, and then drying treatment is carried out, and after the drying treatment, the coating and sanding are carried out again, and the drying treatment is carried out again; the coating, sanding and drying treatment processes are r...

Embodiment 3

[0063] The difference from Example 1 is that step 4) in the casting method of the small flowmeter of this embodiment is to put the assembly of the mold and the mold shell into the demoulding kettle for demoulding after filling the fireproof material 12 Minutes, let the plastic in the shell completely melt and clean up to get a hollow shell inside. All the other steps are the same as in Example 1.

[0064]The technical processes not specifically described in the above-mentioned embodiments are conventional technical processes.

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Abstract

The invention belongs to the technical field of precise casting and relates to a casting method of a workpiece with a partition plate arranged in a thin long hole. The casting method comprises the steps of model treeing, coating, upper cushion sand filling, demoulding, cooling, pouring and the like. The special demoulding pretreatment solves the problem of cracking of a model shell, then the situation of run-out occurring in follow-up pouring is avoided, the method is easy to operate, additional design is avoided, the casting success rate can be increased, and then the cost is saved.

Description

technical field [0001] The invention belongs to the technical field of precision casting, and relates to a casting method for a workpiece with a partition in an elongated hole. Background technique [0002] Shell casting uses metal or plaster to make a fusible mold with the same structure as the workpiece to be cast, and then covers the outer surface of the mold with sand to form a shell; then melt and discharge the mold inside the shell, and the shell The body is formed into a mold shell; the mold shell is roasted and cast, and after the internal medium of the mold shell is cooled and formed, the mold shell is broken to obtain a casting. [0003] In the shell mold casting of small workpieces with holes, due to the complex structure in the holes, the shells in the holes often interfere with each other when melting the mold, resulting in deformation or small holes, resulting in the problem of fire after casting; And the probability of running out of fire increases sharply wi...

Claims

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Application Information

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IPC IPC(8): B22C9/04B22C9/22B22C7/02B22D31/00
CPCB22C7/026B22C9/043B22C9/22B22D31/002
Inventor 李文静马晓龙王小刚王宏岗
Owner 西安皓森精铸股份有限公司
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