Casting method of heat-resistant steel slime blind-tube and mold thereof

A technology of heat-resistant steel and blind pipe, applied in the direction of casting molding equipment, casting molds, casting mold components, etc., can solve the problems of easy deformation of the mold core, eccentric sand core, complex process, etc., and achieve a simple casting method and not easy to damage The effect of deformation and simple production process

Inactive Publication Date: 2009-03-25
山东省耐磨耐蚀材料工程技术研究中心 +1
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  • Abstract
  • Description
  • Claims
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Problems solved by technology

[0006] The purpose of the present invention is to solve the technical problems of complex process, easy deformation of mold core and eccentric sand core in the existing casting method, and provide a casting method of heat-resistant steel slender blind pipe

Method used

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  • Casting method of heat-resistant steel slime blind-tube and mold thereof
  • Casting method of heat-resistant steel slime blind-tube and mold thereof

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Embodiment Construction

[0030] Refer below figure 1 and figure 2 The casting method and model structure of the present invention are further described.

[0031] 1. Make composite mandrel 1 according to the geometric dimensions of the slender blind tube. Cut a thin steel pipe 7, the diameter of the thin steel pipe 7 is 1.2-2.5 mm less than the diameter of the blind pipe to be made, and the length of the thin steel pipe 7 is equal to the sum of the blind hole length and the clamping length of the sand mold shell 2; drill on the thin steel pipe 7 wall There are small holes 10, and there are no strict requirements on hole diameter, hole distance, and arrangement. After drilling, resin sand 8 with a thickness of 1 to 2 mm is coated on the surface of thin steel pipe 7. The resin sand 8 used is covered with phenolic resin with high strength and low gas generation. Membrane sand and resin sand 8 outer layer are evenly coated with 0.2-0.5mm thick coating 9 commonly used for casting heat-resistant steel, an...

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Abstract

The invention discloses a refractory steel vimineous blind tube casting method and a mould thereof. The main point is that a compound core bone is arranged in a resin sand mould shell whose top is provided with an air exhaust hole, the bottom of the resin sand mould shell is provided with a bottom-injected pouring basin, the pouring cup height of the pouring basin is higher than the height of the resin sand mould shell. The invention adopts compound core bone to make sand core, the producing technique is simple, the mould does not deform during roasting and the bottom-injected pouring basin ensure the sand core not to be eccentric.

Description

technical field [0001] The invention relates to the field of casting, in particular to a casting method of a heat-resistant steel slender blind pipe, such as a casting method of a thermocouple blind hole casing. Background technique [0002] The current casting methods of heat-resistant steel slender blind pipes include general investment casting process and investment casting process using water-soluble sand core. [0003] In the general investment casting process, when the length of the manufacturing casing is greater than 300mm and the diameter ratio is ≥ 30, the through pipe and the blind pipe with a length of 150mm are cast first, and then a thermocouple casing blind pipe blank is manufactured by welding. The blind pipe produced by this process has a weld zone at a distance of 150mm from the outer surface of the blind pipe. When the weld is at high temperature and is eroded by the high-temperature air flow carrying solid particles, due to the chemical composition of the...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B22C9/02B22C9/10B22C9/08
Inventor 孙宏飞王灿明渠智彦刘宪刚毕继鑫崔庆礼
Owner 山东省耐磨耐蚀材料工程技术研究中心
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