Unlock instant, AI-driven research and patent intelligence for your innovation.

Molding sand additive for preventing iron castings from sand burning and molding sand

A technology for iron castings and additives, which is applied in casting molds, casting molding equipment, cores, etc., can solve problems such as poor working environment, high price, and use restrictions, reduce the use of pulverized coal, solve the problem of excessive addition, The effect of improving performance

Active Publication Date: 2019-12-03
ANHUI POLYTECHNIC UNIV MECHANICAL & ELECTRICAL COLLEGE
View PDF12 Cites 0 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] Polystyrene is mainly used as an additive for polymers. It is expensive and has a peculiar smell when pouring, which affects the health of workers.
[0005] At present, coal anti-sticking sand additives are generally used. Although coal has a high bright carbon content as an additive and has a better anti-sticking sand effect, the amount added to achieve the effect of anti-sticking sand is large, resulting in a decline in the performance of the molding sand, and The working environment is poor, and as the price of pulverized coal continues to increase, the supply of high-quality coal is tight and its use is limited

Method used

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
View more

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0028] A molding sand additive for preventing iron castings from sticking sand, comprising the following raw materials in weight percentage: 9% of plant fiber, 55% of alpha starch, 25% of oil shale, Fe 2 o 3 5%, coal powder 6%, its preparation method is:

[0029] (1) The oil shale, coal powder, Fe 2 o 3 Mix in a ball mill and mill for 30-60 minutes;

[0030] (2) Adding plant fiber and α-starch of formula quantity to step (1) and continuing ball milling for 20-30min;

[0031] (3) Squeeze the ball-milled material into a block, and vacuum-dry it in a vacuum oven at a temperature of 60-80°C for 1.5-2 hours;

[0032] (4) Grinding the dried material to a particle size of 100-120 mesh.

[0033] The molding sand additive for preventing sand sticking of iron castings prepared in the above steps is added as an additive for molding sand, and the proportion of the molding sand is 4.5%, and the molding sand is prepared by a conventional process.

Embodiment 2

[0035] A molding sand additive for preventing iron castings from sticking sand, comprising the following raw materials in weight percentage: 8% of plant fiber, 57% of alpha starch, 20% of oil shale, Fe 2 o 3 7%, coal powder 8%, its preparation method is:

[0036] (1) The oil shale, coal powder, Fe 2 o 3 Mix in a ball mill and mill for 30-60 minutes;

[0037] (2) Adding plant fiber and α-starch of formula quantity to step (1) and continuing ball milling for 20-30min;

[0038] (3) Squeeze the ball-milled material into a block, and vacuum-dry it in a vacuum oven at a temperature of 60-80°C for 1.5-2 hours;

[0039] (4) Grinding the dried material to a particle size of 100-120 mesh.

[0040] The molding sand additive for preventing sand sticking of iron castings prepared in the above steps is added as an additive for molding sand, and the proportion of the molding sand is 4%, and the molding sand is prepared by a conventional process.

Embodiment 3

[0042] A molding sand additive for preventing iron castings from sticking sand, comprising the following raw materials in weight percentage: 7% of plant fiber, 50% of alpha starch, 30% of oil shale, Fe 2 o 3 6%, coal powder 7%, its preparation method is:

[0043] (1) The oil shale, coal powder, Fe 2 o 3 Mix in a ball mill and mill for 30-60 minutes;

[0044] (2) Adding plant fiber and α-starch of formula quantity to step (1) and continuing ball milling for 20-30min;

[0045] (3) Squeeze the ball-milled material into a block, and vacuum-dry it in a vacuum oven at a temperature of 60-80°C for 1.5-2 hours;

[0046] (4) Grinding the dried material to a particle size of 100-120 mesh.

[0047] The molding sand additive for preventing sand sticking of iron castings prepared in the above steps is added as an additive for molding sand, and the proportion of the molding sand is 5%, and the molding sand is prepared by a conventional process.

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More

PUM

PropertyMeasurementUnit
Lengthaaaaaaaaaa
Particle sizeaaaaaaaaaa
Login to View More

Abstract

The invention relates to a molding sand additive for preventing iron castings from sand burning and a molding sand; the molding sand additive comprises the following raw materials in percentage by weight: 7%-10% of plant fibers, 50%-70% of alpha starch, 20%-30% of oil shale, 5%-9% of Fe2O3 and 6%-8% of pulverized coal, and the sum of the weight percentages of the raw materials is 100%. According to the molding sand additive for preventing the iron casting from sand burning, the casting defects of sand burning, slag inclusion, air holes, microcracks and the like of the iron casting are completely eradicated, and meanwhile, the problems that the adding amount of a pulverized coal additive is too large, and the price of pulverized coal is continuously increased are solved; and the influence on the working environment is reduced.

Description

technical field [0001] The invention belongs to the technical field of clay-sand casting, and in particular relates to a molding sand additive and molding sand for preventing iron castings from sticking to sand. Background technique [0002] At present, the anti-sticking sand additives used at home and abroad mainly include the following four types of petroleum derivatives, coal and coal processing products, polymers, various starches and wood. [0003] Petroleum derivatives are mainly used as additive materials such as natural asphalt, artificial asphalt, oil residue, heavy oil, etc., which have the advantages of high bright carbon content and good anti-sticking sand effect. Occasionally, an unpleasant smelly gas is emitted, so it needs to be made into an emulsion or heated to a liquefied state when used. [0004] Polystyrene is mainly used as an additive for polymers, which is expensive and has peculiar smell when pouring, which affects the health of workers. [0005] At...

Claims

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More

Application Information

Patent Timeline
no application Login to View More
IPC IPC(8): B22C1/04
CPCB22C1/04
Inventor 柴知章王青青
Owner ANHUI POLYTECHNIC UNIV MECHANICAL & ELECTRICAL COLLEGE