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Casting method for pouring and molding thin-wall investment pattern steel casting

A technology of pouring molding and investment casting, which is applied in the casting field of thin-walled investment steel castings. It can solve the problems of casting shrinkage cavity and casting deformation, and achieve the effect of reducing the production cost of enterprises and improving the qualified rate of castings

Active Publication Date: 2014-01-15
JIASHAN SINHAI PRECISION CASTING
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] The purpose of the present invention is to solve the deficiencies of the prior art and provide a thin-walled investment casting casting method that can avoid casting shrinkage, loosening or casting deformation, and can also reduce production costs.

Method used

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  • Casting method for pouring and molding thin-wall investment pattern steel casting
  • Casting method for pouring and molding thin-wall investment pattern steel casting
  • Casting method for pouring and molding thin-wall investment pattern steel casting

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Embodiment 1

[0030] Such as figure 2 , image 3 , Figure 4 with Figure 5 As shown, the casting method of the thin-walled investment casting steel casting provided by the present embodiment includes the following steps:

[0031] a. First prepare a plurality of straight iron wires with a diameter of 0.5mm and a length of 50mm, and apply a layer of wax with a thickness of 0.1mm on the outer surface of the straight iron wires;

[0032] b. Then insert the straight iron wire in the previous step into the wax mold group 3 after the tree is assembled, and the insertion depth is 4mm;

[0033] c. Then dip the straight iron wire in the previous step with the wax mold group 3 into paint slurry and coat hanging sand;

[0034] d. After forming the mold shell 4 on the surface of the wax mold group 3, first destroy part of the mold shell 4 on the surface of the other end of the straight iron wire, extract the straight iron wire, and then dewax and roast;

[0035] e. When pouring molten steel at th...

Embodiment 2

[0037] Such as Image 6 , Figure 7 , Figure 8 with Figure 9 As mentioned above, the thin-walled investment casting casting method provided by this embodiment includes the following steps:

[0038] a. First, prepare multiple hard plastic wires with a diameter of 1mm and a length of 100mm. The bending strength of the above-mentioned hard plastic wires is greater than 15Mpa, and the gasification temperature of burning loss is lower than 800°C;

[0039] b. Then glue one end of the hard plastic line in the previous step to the wax mold group 3 after the tree has been assembled, and the bonding length is 6mm;

[0040] c. Then dip the hard plastic wire in the previous step with the wax mold set 3 and paint the coating slurry and hang sand;

[0041] d. After the mold shell 4 is formed on the surface of the wax mold group 3, dewaxing and roasting are carried out, and the hard plastic line is burned to form a cavity 5 on the mold shell 4;

[0042] e. When pouring the molten stee...

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Abstract

The invention discloses a casting method for pouring and molding a thin-wall investment pattern steel casting, aiming to prevent the casting from cavity-shrinking, loosening or deforming. The method comprises the following steps: a. first preparing multiple wire-shaped metal materials with diameter of 0.5-1mm and length of 50-100mm and coating the outer surface of each wire-shaped metal material with a layer of wax with thickness of 0.1-0.2mm; b. inserting the wire-shaped metal materials from the last step into an assembled wax module, wherein the inserting thickness is 4-8mm; c. coating and smearing the wire-shaped metal materials with slurry and sands together with the wax module; d. after forming a module shell on the surface of the wax module, firstly destroying parts of module shell on the surface of the other end of the wire-shaped metal materials, drawing out the wire-shaped metal materials, and then performing dewaxing and roasting; e. finally pouring molten steel, wherein cavities which are formed in the module shell after the wire-shaped metal materials are drawn out can be used for drainage. By virtue of the method, the pass percent of the castings is enhanced.

Description

technical field [0001] The invention relates to a casting method, in particular to a casting method for pouring thin-walled investment cast steel pieces. Background technique [0002] Due to its high mechanical performance and low price, steel castings are widely used in aviation, aerospace, shipbuilding, electronics, hardware, pump valves and other fields; however, due to their large specific gravity, the specific gravity is 7.8 g / cm3 Parts or equipment are heavy, or even overweight, which restricts the efficacy of parts and equipment to a certain extent. Therefore, in the structural design of steel castings, without affecting the mechanical properties, it is gradually developed to be thin-walled and light-weight, so as to reduce the weight of parts or equipment and improve their efficacy. [0003] However, due to the inherent casting characteristics of steel castings, thin-walled castings are not easy to cast, especially products with a wall thickness of less than 2mm, wh...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B22C9/04
Inventor 吴金海
Owner JIASHAN SINHAI PRECISION CASTING
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