CN104475652A - Anti-shakeout molding sand and preparation method thereof - Google Patents

Abstract

The invention relates to anti-shakeout molding sand, which is prepared from the following raw materials by weight: 200-220 parts of clay, 4-5 parts of a phenol formaldehyde resin, 20-25 parts of silicon carbide, 10-15 parts of phosphorus tailings, 20-30 parts of feldspar, 2-3 parts of rice bran wax, 1-2 parts of sunflower seed wax, 1-2 parts of an emulsifier OP, 20-30 parts of ceramic sand with a particle size of 1-2 mm, a proper amount of water, and 20-30 parts of an auxiliary agent. According to the anti-shakeout molding sand of the present invention, the ceramic sand is used, such that the high temperature collapsibility is good, the removing is easy, and the sand is not easily adhered on the cast; the clay is used and the granulation is performed so as to provide advantages of good gas permeability, recycling and environmental pollution reducing, and the surface treatment is performed so as to provide advantages of low moisture absorption and good fluidity; the auxiliary agent of the present invention adopts alumina and other high temperature resistance materials, such that the auxiliary agent can not melt during casting, the adhesion of the clay particles can be prevented, and the fluidity is good; and the comprehensive performance of the molding sand is ensured, and the purposes of mold forming quality improving, cast shakeout reducing and pore reject rate reducing can be achieved.

Description

A kind of anti-pot capable of separating sand sand and preparation method thereof

Technical field

The present invention relates to a kind of casting field, particularly relate to a kind of anti-pot capable of separating sand sand and preparation method thereof.

Background technology

Current molding sand is generally mixed according to a certain percentage by Modeling Materials such as Foundry sand, moulding sand binder and additional things.If molding sand particle diameter is too large, although gas permeability is better, cast(ing) surface is more coarse, and fineness is bad; If molding sand material footpath is too little, cause mo ld void bad, aluminium casting has pore to produce.Therefore the particle diameter controlling molding sand is needed.

Molding sand also can with natural silica sand argillaceous, domestic and international widely used coal dust clay green-sand, generally formed with the water system of mixing by roughing sand, binding agent, coal dust additive etc., there is certain Sand sticking-resistant effect and the advantage that the cost of material is low, production efficiency is high, but its consumption is large, discharge seriously, at casting process coal dust firing decomposition generation toxic gas is polluted.Conventional clay molding sand is not easy to be recycled, also there is the shortcomings such as easy dusting beans, collapsibility is poor, poor fluidity, heat resistance are bad, needs to improve.

Summary of the invention

The object of the present invention is to provide a kind of anti-pot capable of separating sand sand and preparation method thereof, this molding sand high temperature collapsibility is good, easy-clear, sticky foundry goods, not only good permeability, but also can recycling, decrease environmental pollution, also there is good mobility, reach and improve initial mould quality, reduce the object of casting falling sand, pore percent defective.

Technical scheme of the present invention is as follows:

A kind of anti-pot capable of separating sand sand, is characterized in that being made up of the raw material of following weight portion: ceramic sand 20-30, the water of clay 200-220, phenolic resins 4-5, carborundum 20-25, phosphorus mine tailing 10-15, feldspar 20-30, rice bran wax 2-3, sunflower seeds wax 1-2, polyoxyethylene nonylphenol ether 1-2,1-2mm particle diameter are appropriate, auxiliary agent 20-30;

Described auxiliary agent is made up of the raw material of following weight portion: two oleamide 0.4-0.6, Bi2O3 1-2, B2O3 1-2 of aluminium oxide 13-17, titanium dioxide 3-4, quartz sand 3-5, tall oil 0.5-1, dolomol 1-1.4, ethylene, clay 3-4, silane resin acceptor kh-550 0.8-1.2, water are appropriate; Preparation method is: by aluminium oxide, titanium dioxide, quartz sand, Bi2O3, B2O3 mixing, sends into dry pot and is heated to melt, add Quench in cold water, be ground into the particle of particle diameter≤1.5mm; Add in 4-5 weight parts water by clay, silane resin acceptor kh-550, add described particle after stirring, grinding 20-30 minute, dries, and pulverize, particle diameter at 0.05-2mm, then mixes with other residual components, stirs, to obtain final product.

The preparation method of described anti-pot capable of separating sand sand, is characterized in that comprising the following steps:

(1) by clay, phosphorus mine tailing, feldspar mixing, pulverize, cross 50 mesh sieves, the water adding 7-9% weight portion stirs, granulation, particle diameter, at 0.05-2mm, is sent in calcining furnace, pre-burning 20-25 minute at 300-400 DEG C, then sinter at 900-1000 DEG C, take out, polish to surface roughness≤0.1mm, obtain clay particle;

(2) get the water of 20-30 weight portion, add rice bran wax, polyoxyethylene nonylphenol ether, sunflower seeds wax, be heated to 70-80 DEG C, stir, obtain slurry, clay particle is seethed while spray into described slurry, mix rear placement 2-3 hour, dry, obtain mixed material;

(3) material that (2) step obtains is mixed with other residual components, then the water adding 1-2% weight portion mixes, and to obtain final product.

Beneficial effect of the present invention

Molding sand of the present invention, by using ceramic sand, adds high temperature collapsibility good, easy-clear, not sticky foundry goods; By using clay, through granulation, not only good permeability, but also can recycling, decrease environmental pollution, through surface treatment, hygroscopicity is little, also has good mobility; Auxiliary agent of the present invention employs the exotic materials such as aluminium oxide, can not be melted, clay particle can be prevented to be bonded together when casting, convenient recycling, simultaneously because Surface coating has clay, strong with the adhesion of clay particle, adds the plasticity of molding sand; The good fluidity of this auxiliary agent simultaneously; This invention ensures that the combination property of molding sand, reach and improve initial mould quality, reduce the object of casting falling sand, pore percent defective.

Detailed description of the invention

A kind of anti-pot capable of separating sand sand, is made up of the raw material of following weight portion (kilogram): ceramic sand 25, the water of clay 210, phenolic resins 4.5, carborundum 23, phosphorus mine tailing 13, feldspar 25, rice bran wax 2.5, sunflower seeds wax 1.5, polyoxyethylene nonylphenol ether 1.5,1-2mm particle diameter are appropriate, auxiliary agent 25;

Described auxiliary agent is made up of the raw material of following weight portion (kilogram): the two oleamide 0.5 of aluminium oxide 15, titanium dioxide 3.5, quartz sand 4, tall oil 0.7, dolomol 1.2, ethylene, Bi2O3 1.5, B2O3 1.5, clay 3.5, silane resin acceptor kh-550 1, water are appropriate; Preparation method is: by aluminium oxide, titanium dioxide, quartz sand, Bi2O3, B2O3 mixing, sends into dry pot and is heated to melt, add Quench in cold water, be ground into the particle of particle diameter≤1.5mm; Add in 4.5 weight parts waters by clay, silane resin acceptor kh-550, add described particle after stirring, grind 25 minutes, dry, pulverize, particle diameter at 0.05-2mm, then mixes with other residual components, stirs, to obtain final product.

The preparation method of described anti-pot capable of separating sand sand, comprises the following steps:

(1) by clay, phosphorus mine tailing, feldspar mixing, pulverize, cross 50 mesh sieves, the water adding 8% weight portion stirs, granulation, particle diameter, at 0.05-2mm, is sent in calcining furnace, pre-burning 23 minutes at 350 DEG C, then sinter at 950 DEG C, take out, polish to surface roughness≤0.1mm, obtain clay particle;

(2) get the water of 25 weight portions, add rice bran wax, polyoxyethylene nonylphenol ether, sunflower seeds wax, be heated to 75 DEG C, stir, obtain slurry, clay particle is seethed while spray into described slurry, mix rear placement 2.5 hours, dry, obtain mixed material;

(3) material that (2) step obtains is mixed with other residual components, then the water adding 1.5% weight portion mixes, and to obtain final product.

The sand test data that the present embodiment obtains are as follows: green compression strength is 180KPa, gas permeability 1330, and hot green tensile strength is 4KPa, and normal temperature green tensile strength is 29KPa.

Claims (2)

1. an anti-pot capable of separating sand sand, is characterized in that being made up of the raw material of following weight portion: ceramic sand 20-30, the water of clay 200-220, phenolic resins 4-5, carborundum 20-25, phosphorus mine tailing 10-15, feldspar 20-30, rice bran wax 2-3, sunflower seeds wax 1-2, polyoxyethylene nonylphenol ether 1-2,1-2mm particle diameter are appropriate, auxiliary agent 20-30;

Described auxiliary agent is made up of the raw material of following weight portion: two oleamide 0.4-0.6, Bi2O3 1-2, B2O3 1-2 of aluminium oxide 13-17, titanium dioxide 3-4, quartz sand 3-5, tall oil 0.5-1, dolomol 1-1.4, ethylene, clay 3-4, silane resin acceptor kh-550 0.8-1.2, water are appropriate; Preparation method is: by aluminium oxide, titanium dioxide, quartz sand, Bi2O3, B2O3 mixing, sends into dry pot and is heated to melt, add Quench in cold water, be ground into the particle of particle diameter≤1.5mm; Add in 4-5 weight parts water by clay, silane resin acceptor kh-550, add described particle after stirring, grinding 20-30 minute, dries, and pulverize, particle diameter at 0.05-2mm, then mixes with other residual components, stirs, to obtain final product.

2. the preparation method of anti-pot capable of separating sand sand according to claim 1, is characterized in that comprising the following steps:

(1) by clay, phosphorus mine tailing, feldspar mixing, pulverize, cross 50 mesh sieves, the water adding 7-9% weight portion stirs, granulation, particle diameter, at 0.05-2mm, is sent in calcining furnace, pre-burning 20-25 minute at 300-400 DEG C, then sinter at 900-1000 DEG C, take out, polish to surface roughness≤0.1mm, obtain clay particle;

(2) get the water of 20-30 weight portion, add rice bran wax, polyoxyethylene nonylphenol ether, sunflower seeds wax, be heated to 70-80 DEG C, stir, obtain slurry, clay particle is seethed while spray into described slurry, mix rear placement 2-3 hour, dry, obtain mixed material;

(3) material that (2) step obtains is mixed with other residual components, then the water adding 1-2% weight portion mixes, and to obtain final product.