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Vein-proof additive for casting and preparing method thereof

An additive and veining technology is applied in the field of casting additives to achieve the effect of strengthening the chilling effect, improving the thermoplasticity and avoiding the veining defect.

Inactive Publication Date: 2019-07-12
GANSU KOCEL CHEM
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] The invention provides an anti-veining additive product with remarkable anti-veining effect, low cost and no influence on sand core strength to solve the common veining casting defects of existing resin sand castings

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0029] The anti-veining additive for casting is prepared according to the following method:

[0030] (1) Sieve zircon sand and shale particles with 30-mesh and 100-mesh sieves respectively, and keep the sieve residue between 30-mesh and 100-mesh for later use;

[0031] (2) Sieve the spodumene particles and the ilmenite particles with 50 mesh and 150 mesh sieves respectively, and keep the sieve residue between 50 mesh and 150 mesh sieves for subsequent use;

[0032] (3) Sieve the iron oxide black powder with 100 mesh and 325 mesh sieves, and keep the sieve residue between 100 mesh and 325 mesh sieves for subsequent use;

[0033] (4) Weigh 5% of zircon sand, 25% of shale particles, 40% of spodumene particles, 15% of ilmenite particles, and 15% of iron oxide black powder after sieving, and add them to special mixing equipment in turn , turn on the stirring for mixing, mix evenly and discharge the material for packaging.

Embodiment 2

[0035] The anti-veining additive for casting is prepared according to the following method:

[0036] (1) Sieve the chromite sand and pyrophyllite particles with 30 mesh and 100 mesh sieves respectively, and keep the sieve residue between 30 mesh and 100 mesh for subsequent use;

[0037] (2) Sieve the lithium-phosphorite particles and the rutile particles with 50 mesh and 150 mesh sieves respectively, and keep the sieve residue between 50 mesh and 150 mesh sieves for subsequent use;

[0038] (3) Sieve the iron oxide red powder with 100 mesh and 325 mesh sieves, and keep the sieve residue between 100 mesh and 325 mesh sieves for subsequent use;

[0039] (4) Weigh 12% of chromite sand, 19% of pyrophyllite particles, 30% of spodumene particles, 19% of ilmenite particles, and 20% of red iron oxide powder after sieving, and add them to special mixing equipment in turn , turn on the stirring for mixing, mix evenly and discharge the material for packaging.

Embodiment 3

[0041] The anti-veining additive for casting is prepared according to the following method:

[0042] (1) Sieve the olivine sand and mica particles with 30 mesh and 100 mesh sieves respectively, and keep the sieve residue between 30 mesh and 100 mesh for subsequent use;

[0043] (2) Sieve the lithium petalite particles and ilmenite particles with 50 mesh and 150 mesh sieves respectively, and keep the sieve residue between 50 mesh and 150 mesh sieves for subsequent use;

[0044] (3) Sieve the oxidized black-red powder with 100 mesh and 325 mesh sieves, and keep the sieve residue between 100 mesh and 325 mesh sieves for subsequent use;

[0045] (4) Weigh 10% of olivine sand, 16% of mica, 55% of petalite feldspar, 11% of ilmenite particles, and 8% of iron oxide black powder after sieving, and add them to special mixing equipment in turn, and start Stir for mixing, mix evenly, and then discharge and pack.

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PUM

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Abstract

The invention relates to a vein-proof additive for casting and a preparing method thereof. The vein-proof additive comprises 5-15% of special mold sand, 8-25% of silicate particles, 30-55% of lithiumcontaining mineral particles, 8-20% of titanium containing mineral particles and 8-20% of iron oxide powder, wherein the special mold sand comprises at least one of zircon sand, chromite sand, olivinesand and ceramsite; the silicate particles are of a layered structure and comprise at least one of shale, pyrophyllite and mica; the lithium containing mineral particles comprise at least one of spodumene, amblygonite and petalite; the titanium containing mineral particles comprise at least one of ilmenite, rutile, anatase titanium dioxide, brookite and leucoxene; and the iron oxide powder comprises iron oxide black and iron oxide red. On account of the common vein casting flaws of resin sand castings, the invention provides the vein-proof additive product which has a remarkable vein-proof effect, is low in cost and does not affect the strength of sand cores.

Description

technical field [0001] The invention relates to the technical field of casting additives, in particular to an anti-veining additive for casting and a preparation method thereof. Background technique [0002] Veining is a common casting defect in resin sand castings, and it is mostly distributed at the corners of the inner surface of the casting and at high-temperature hot joints. Veining defects affect the surface quality of castings and increase the cleaning workload of castings. Veining defects in complex inner cavities often lead to scrapping of castings because they cannot be cleaned. [0003] In foundry production, resin sand raw sand is generally made of natural quartz sand, the main chemical composition is SiO 2 . Quartz in nature is mostly β-quartz. With different temperature changes and cooling rates, quartz can exist in a variety of isomorphic forms, and correspondingly produce different volume and density changes. At 573°C, the crystal form of the quartz sand ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B22C1/02
CPCB22C1/02
Inventor 崔刚张宏凯陈学更
Owner GANSU KOCEL CHEM
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