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Production process for casting spherical end cover

A technology of casting production and production technology, which is applied in the field of casting production technology of spherical end caps, can solve the problems of complex process and low processing efficiency, and achieve the effect of simple process, high processing efficiency and improved quality

Active Publication Date: 2010-11-24
WUJIANG HYDRAULIC COMPONENTS FOUNDRY
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] The purpose of the present invention is to overcome the defects and problems of complex process and low processing efficiency in the prior art, and provide a casting production process of a spherical end cap with simple process and high processing efficiency

Method used

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Embodiment 1

[0020] A casting production process of a spherical end cap, the production process includes mold making in sequence, that is, firstly making an upper mold shell, a lower mold shell and a mold sleeve according to the shape of the spherical end cap, and then setting a casting solution on the top of the upper mold Import port, and the material of the mold is metal, then sand core making, core setting operation, and then pouring operation, that is, the mold formed after the core setting operation is preheated first, and the preheating temperature is 250-300°C , the preheating time is 5 hours, and then spray heat-resistant material on the inner surface of the mold after preheating, the heat-resistant material is quartz powder and diatomite, and its mass percentage is 8: 1, and then the mold after spraying Carry out mold insulation, the insulation temperature is 180°C, the holding time is 15 minutes, and then the casting solution with the tapping temperature of 1500-1550°C is injecte...

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Abstract

The invention relates to a production process for casting a spherical end cover, which sequentially comprises the following steps of: mold manufacturing, namely manufacturing an upper formwork, a lower formwork and a mold sleeve according to the shape of the spherical end cover; core manufacturing; core setting; pouring, namely preheating a casting mold formed by the core setting, spraying a heat-resisting material on the internal surface of the preheated casting mold, preserving the heat of the sprayed casting mold, pouring casting liquid at the tapping temperature of between 1,500 and 1,550 DEG C into a cavity for 5 to 15 seconds at the pouring temperature of between 1,380 and 1,440 DEG C, and preserving the heat of a casting for 60 to 100 minutes, wherein the process yield is 45 to 60 percent, and the heat-resisting material is quartz powder and diatomite in a mass ratio of 6:1-9:1; and mold opening. The process has the advantages of simpleness, capability of improving the quality of the casting, and high processing efficiency.

Description

technical field [0001] The invention relates to a production method of an end cover, in particular to a casting production process of a spherical end cover, which is particularly suitable for integral casting of a spherical end cover on a valve or a pump. Background technique [0002] As an important protective part of a valve, pump or motor, the end cover must have strong mechanical properties and high corrosion resistance, which puts forward higher requirements for the manufacture of the end cover. Among them, compared with ordinary Flat end caps and spherical end caps have higher manufacturing requirements. [0003] The Chinese patent publication number is CN101021194A, and the invention patent published on August 22, 2007 discloses a starter front end cover and its processing technology. The front end cover includes an end cover body, a driving end face, a middle cover end face, and a switch end face. The front part of the end cover body is set as the driving end face, ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B22C9/06B22C3/00B22D27/04
Inventor 浦巧生
Owner WUJIANG HYDRAULIC COMPONENTS FOUNDRY
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