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Preparation process of molding sand for semi-closed water pump impeller

A water pump impeller and semi-closed technology, which is applied in the field of molding sand preparation process for semi-closed water pump impellers, can solve the problems of low recovery rate of old sand, sand washing and other problems, improve refractoriness and metal oxidation resistance, prevent Chemical sticky sand, solve the effect of sand washing and sand expansion

Active Publication Date: 2018-01-02
SICHUAN ANYUE YULIANG AUTOMOBILE WATER PUMP
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] Aiming at the above-mentioned deficiencies in the prior art, the present invention provides a semi-closed water pump impeller molding sand preparation process that effectively solves the problems of sand washing, sand swelling, and low recovery rate of old sand after casting.

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0019] The molding sand in the molding sand preparation process for the semi-closed water pump impeller of the present embodiment includes the following components in parts by weight:

[0020] 100 parts of new sand, 950 parts of recycled sand, 83 parts of forsterite sand, 16 parts of curing agent, 17 parts of sodium bentonite, 8 parts of refractory fiber, 14 parts of water glass, 22 parts of slaked lime;

[0021] The preparation of molding sand includes the following steps:

[0022] a. The waste sand is crushed, and screened with a 200-mesh sieve to obtain regenerated sand for later use. The proportion of the regenerated sand that has not passed the 100-mesh sieve is 60%;

[0023] b. Screen the new sand through a 150-mesh sieve for standby use. The proportion of the new sand passing through a 100-mesh sieve is 70%, and the mud content of the new sand is ≤ 1%;

[0024] c, the forsterite is crushed, and screened through a 200-mesh sieve to obtain forsterite sand;

[0025] d. A...

Embodiment 2

[0031] The molding sand in the molding sand preparation process for the semi-closed water pump impeller of the present embodiment includes the following components in parts by weight:

[0032] 200 parts of new sand, 700 parts of recycled sand, 130 parts of forsterite sand, 10 parts of curing agent, 20 parts of sodium bentonite, 10 parts of refractory fiber, 23 parts of water glass, 15 parts of hydrated lime, 13 parts of pine tar;

[0033] The preparation of molding sand includes the following steps:

[0034] a. The waste sand is crushed, and screened with a 200-mesh sieve to obtain regenerated sand for later use. The proportion of the regenerated sand that has not passed the 100-mesh sieve is 60%;

[0035] b. Screen the new sand through a 150-mesh sieve for standby use. The proportion of the new sand passing through a 100-mesh sieve is 70%, and the mud content of the new sand is ≤ 1%;

[0036] c, the forsterite is crushed, and screened through a 200-mesh sieve to obtain forst...

Embodiment 3

[0043] The molding sand in the molding sand preparation process for the semi-closed water pump impeller of the present embodiment includes the following components in parts by weight:

[0044] 150 parts of new sand, 500 parts of recycled sand, 80 parts of forsterite sand, 20 parts of curing agent, 27 parts of sodium bentonite, 13 parts of refractory fiber, 10 parts of water glass, 19 parts of slaked lime, 18 parts of pine tar;

[0045] The preparation of molding sand includes the following steps:

[0046] a. The waste sand is crushed, and screened with a 200-mesh sieve to obtain regenerated sand for later use. The proportion of the regenerated sand that has not passed the 100-mesh sieve is 60%;

[0047] b. Screen the new sand through a 150-mesh sieve for standby use. The proportion of the new sand passing through a 100-mesh sieve is 70%, and the mud content of the new sand is ≤ 1%;

[0048] c, the forsterite is crushed, and screened through a 200-mesh sieve to obtain forsteri...

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Abstract

The invention discloses a moulding sand production process for a semi-closed water pump impeller. Moulding sand comprises the following components in parts by weight: 100 to 200 parts of fresh sand, 500 to 950 parts of reclaimed sand, 80 to 130 parts of forsterite sand grains, 10 to 20 parts of curing agent, 15 to 27 parts of sodium bentonite, 5 to 13 parts of refractory fiber, 10 to 25 parts of sodium silicate, and 15 to 23 parts of slaked lime. The production process comprises the following steps of smashing waste sand, and sieving through a 200-mesh sieve for standby application; sieving the fresh sand through a 150-mesh sieve for standby application; smashing forsterite, and sieving through a 200-mesh sieve to produce the forsterite sand grains; adding the fresh sand, the reclaimed sand and the forsterite sand grains into a sand mixer, then adding water accounting for 1 percent of the total mass of the fresh sand, the reclaimed sand and the forsterite sand grains, and mixing and grinding for 15 to 22min; and adding remaining component raw materials, mixing and grinding for 5 to 12min, and finally refilling water accounting for 1 percent to 2 percent of the total mass of the final mixture.

Description

technical field [0001] The invention relates to molding sand for casting water pump castings, in particular to a preparation process of molding sand for a semi-closed water pump impeller. Background technique [0002] Casting is one of the basic industries of machinery manufacturing. The quality of castings directly affects the quality of the mechanical products it manufactures. Although the currently commonly used sand mixing process has the advantages of high production efficiency, good surface roughness of castings, less sand cleaning workload, and low production cost, but the castings cast by the mixed sand produced by these processes will have many flashes , burrs, easy sand washing and sand expansion; at the same time, there is also a low recovery rate of old sand. Contents of the invention [0003] Aiming at the above-mentioned deficiencies in the prior art, the present invention provides a molding sand preparation process for a semi-closed water pump impeller that...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B22C1/00B22C1/02
CPCB22C1/00B22C1/02
Inventor 程小林王述学
Owner SICHUAN ANYUE YULIANG AUTOMOBILE WATER PUMP