CN106747522A - Paper runner pipe part for cast steel casting - Google Patents

Abstract

The invention discloses a paper runner pipe component for cast steel casting, which is made of the following raw materials in weight percentage: 1-70% inorganic sintering powder material, 1-40% organic fiber, 1-20% inorganic fiber, 1-25% thermosetting material, 1-10% binder, 1-5% waterproof and moisture-proof agent, 1-5% reinforcing agent and filter aid, 1-5% fluxing agent and 0-5% flame retardant. The inorganic sintering powder material is a combination of any number of mullite, high-alumina clay, attapulgite, montmorillonite, bentonite, high-alumina powder, quartz, volcanic rock and graphite; the paper runner pipe component will not produce carbonization, decarburization and carburization effects on iron, thereby ensuring that the chemical composition and material properties of the raw materials of the cast steel will not change, and has the advantages of light weight, easy operation, less waste after casting and easy treatment, labor saving, time saving, energy saving and environmental protection, no pollution to the environment, and environmental protection friendly.

Description

A paper sprue pipe part for cast steel casting

technical field

The invention belongs to the technical field of casting auxiliary materials in the steel casting industry, and in particular relates to a paper sprue pipe part for steel casting.

Background technique

In today's existing technology, sprue pipe components widely used in the field of casting are fired by using refractory materials such as pottery and porcelain. The manufacturing process is as follows: the raw materials are made into green body raw materials according to certain specifications, and the tubular green body is made into a tubular green body through the processes of mixing, aging, and mud refining, and then dried and calcined at a high temperature in a kiln to make refractory ceramic sprue pipe parts. When in use, it is buried in the molding sand and becomes a channel for molten steel to enter the cavity. Its basic function is to ensure that sand washing and sand sticking will not occur during the flow of molten steel; after the molten steel is cooled, it will not stick to iron or sand. Its essence is to use the refractory properties of refractory materials to isolate molten iron and molding sand to achieve the above purpose. This technology has defects such as complex manufacturing process, high energy consumption, high environmental pollution, heavy weight, easy damage, large cutting dust, and many hard solid wastes, which are not easy to remove.

In recent years, in the domestic foundry market, cast iron casting has begun to use paper sprue pipe parts and has achieved good results, economic benefits and environmental benefits. However, because the paper sprue tube parts used in cast iron casting contain high carbon and can be cracked during use to produce substances that can increase, decarburize, and carburize iron. Because cast iron castings themselves have a high carbon content, they have little effect on the quality and performance of the casting. The carbon content in cast steel casting raw materials is very low, only a few tenths of a percent. If you use the paper sprue pipe parts used in the foundry industry in recent years, it will have effects such as carburization, decarburization, and carburization on iron during use, thereby changing the chemical composition and material properties of cast steel raw materials. Affect the mechanical properties, processing properties and mechanical strength of castings.

Contents of the invention

The present invention solves the deficiencies of the prior art, and provides a paper-based sprue pipe part with low carbon content for cast steel casting, which will not produce carburization, decarburization, carburization and other effects on iron during cast steel casting , so as to ensure that the chemical composition and material properties of cast steel raw materials will not change.

The technical solution adopted in the present invention is: a paper sprue pipe part for cast steel casting, which is made of the following raw materials in mass percentage, 1-70% of inorganic sintered powder material, 1-40% of organic fiber, 1-40% of inorganic fiber 1-20%, thermosetting material 1-25%, binder 1-10%, waterproof and moisture-proof agent 1-5%, reinforcing agent and filter aid 1-5%, flux 1-5% and flame retardant 0~5%;

in,

The inorganic sintered powder material is any combination of mullite, high alumina clay, attapulgite, montmorillonite, bentonite, high alumina powder, quartz, volcanic rock, and graphite;

Described organic fiber is waste newspaper or wood pulp board;

The thermosetting material is any one or combination of any of sodium silicate, aluminum phosphate cement, gypsum, magnesium cement, silicate, phosphate, colloidal silica, reactive adhesive and phenolic resin;

The binder is any one or a combination of aluminum dihydrogen phosphate and carboxymethyl cellulose

In a preferred embodiment of the present invention, a paper sprue pipe part for cast steel casting is made of the following raw materials in mass percentage, 40-70% of inorganic sintered powder material, 1-30% of organic fiber, Inorganic fiber 1-15%, thermosetting material 1-20%, binder 1-10%, waterproof and moisture-proof agent 1-5%, reinforcing agent and filter aid 1-3%, flux 1-3% and barrier Combustion agent 0~3%.

In a preferred embodiment of the present invention, a paper sprue pipe part for cast steel casting is made of the following raw materials in mass percentage, 50-70% of inorganic sintered powder material, 5-25% of organic fiber, Inorganic fiber 2-10%, thermosetting material 3-20%, binder 1-5%, waterproof and moisture-proof agent 1-3%, reinforcing agent and filter aid 1-3%, flux 1-3% and barrier Combustion agent 0~3%.

In a preferred embodiment of the present invention, the inorganic fiber is any one or a combination of any of glass fibers, aluminum silicate fibers, rock wool, slag wool and carbon fibers.

In a preferred embodiment of the present invention, the waterproof and moisture-proof agent is any one or a combination of aluminum sulfate, polyvinyl alcohol, polypropylene and polyethylene.

In a preferred embodiment of the present invention, the reinforcing agent is any one or a combination of silicate and phosphate.

In a preferred embodiment of the present invention, the filter aid is any one or a combination of aluminum sulfate and polyacrylamide.

In a preferred embodiment of the present invention, the flame retardant is any one or a combination of aluminum hydroxide and phosphorus flame retardants.

In a preferred embodiment of the present invention, the flux is any one or a combination of two of sodium oxide, sodium fluoroaluminate and borax.

Compared with the prior art, the present invention has the beneficial effects:

1. The paper sprue pipe for cast steel casting has low carbon content, and it will not produce carburization, decarburization, carburization and other effects on iron during cast iron casting, thus ensuring the chemical composition and material properties of cast steel raw materials No change will occur.

2. The source of raw materials is wide and waste materials such as waste newspapers, books, cartons, etc. are fully utilized, and the moisture-proof and waterproof performance is good. After soaking in water for 24 hours, it will not swell or deform; the radial stiffness will not be flattened by hand. The ground 1.2m will not be broken when dropped on the concrete floor, and the measured compressive strength at room temperature is not less than 20MPa/cm ² .

3. The production of paper sprue tubes for steel casting realizes the reuse of resources, less waste, and its weight is only 8-10% of ceramic sprue tube parts; the production process of paper sprue tubes for steel casting Calcination-free, energy-saving; does not produce any pollutants, has no effect on castings during use, and does not produce pollutants. It is a typical environmentally friendly and renewable utilization, and it is a green and environmentally friendly innovative product that can be naturally digested after being discarded.

4. The paper sprue pipe parts used for cast steel casting are light in weight during the casting process, and the weight is only about 1/10 of the ceramic sprue pipe parts, which reduces the labor intensity of workers.

5. The paper sprue tube for cast steel casting is easy to cut, and can be cut with ordinary knives, and the dust is reduced during cutting; while the sprue tube parts of ceramic tube are cut with electric saws, which are not easy to cut and have a large amount of dust, which pollutes the environment.

6. The quality of the molding sand is improved. The paper sprue pipe for steel casting is in the form of a socket connection, which is tightly connected and can effectively prevent sand from entering the sprue and being brought into the casting; while the gap between the ceramic sprue and the butt joint is large, the sand is easy to Enter the sprue and be brought into the casting.

7. Ceramic sprue pipe parts have a lot of wear on sand processing equipment. Using paper sprue pipe for cast steel casting reduces the wear of sand on equipment and prolongs its service life.

8. Save labor and time. It usually takes 2-3 people to use ceramic sprue pipe parts and pipe cutting, but only 1 person to use paper sprue pipe for cast steel casting.

9. Ceramic sprue pipe parts have a great influence on the burning amount of molding sand, while the use of paper sprue pipe parts for cast steel casting can improve the quality of molding sand.

detailed description

The present invention will be described in detail below in combination with specific embodiments.

A paper sprue pipe part for cast steel casting, which is made of the following raw materials in mass percentage: 1-70% of inorganic sintered powder material, 1-40% of organic fiber, 1-20% of inorganic fiber, and 1% of thermosetting material ～25%, binder 1～10%, waterproof and moisture-proof agent 1～5%, reinforcing agent and filter aid 1～5%, flux 1～5% and flame retardant 0～5%;

Preferably, a paper sprue pipe part for cast steel casting is made of the following raw materials in mass percentage, 40-70% of inorganic sintered powder material, 1-30% of organic fiber, 1-15% of inorganic fiber, thermal 1-20% of curing material, 1-10% of binder, 1-5% of waterproof and moisture-proof agent, 1-3% of reinforcing agent and filter aid, 1-3% of melting agent and 0-3% of flame retardant.

More preferably, a paper sprue pipe part for cast steel casting is made of the following raw materials in mass percentage, 50-70% of inorganic sintered powder material, 5-25% of organic fiber, 2-10% of inorganic fiber, 3-20% of thermosetting material, 1-5% of binder, 1-3% of waterproof and moisture-proof agent, 1-3% of reinforcing agent and filter aid, 1-3% of melting agent and 0-3% of flame retardant.

in,

The inorganic sintered powder material is any combination of mullite, high alumina clay, attapulgite, montmorillonite, bentonite, high alumina powder, quartz, volcanic rock, and graphite; the inorganic sintered powder material Within the above range, the shape retention at the time of casting and the surface properties of the molded article are good, and the release after molding is suitable.

The organic fibers are waste newspapers or wood pulp boards; the organic fibers have good papermaking properties within the above range, and reduce the amount of combustion gas generated during casting, thereby inhibiting blowback (ie, the reverse flow of molten metal).

The thermosetting material is an inorganic thermosetting material or an organic thermosetting material, wherein the inorganic thermosetting material is sodium silicate, aluminum phosphate cement, gypsum, magnesium cement, silicate, phosphate, colloidal silica, reactive adhesive any One or any combination of several; the organic thermosetting material is phenolic resin, the mixing ratio of the thermosetting material is within the above range, the moldability of casting, the shape retention after casting, and the smoothness of the surface are all good.

The binder is any one or a combination of aluminum dihydrogen phosphate and carboxymethyl cellulose. When the binder mixing ratio is within the above range, the powder components in the raw materials can be attached to the fibers, and the fibers can also be properly intertwined, forming flocs suitable for papermaking, and the qualified rate is high.

The inorganic fiber is any one or combination of any of glass fibers, aluminum silicate fibers, rock wool, slag wool and carbon fibers. When the inorganic fiber is within the above range, the papermaking properties and the shape retention at the time of casting are good.

The waterproof and moisture-proof agent is any one or combination of any of aluminum sulfate, polyvinyl alcohol, polypropylene and polyethylene. The mixing ratio of waterproof and moisture-proof agent is within the above range, and the base paper made from papermaking is used to manufacture cast steel casting paper sprue pipe parts embedded in molding sand. Moisture and water resistance.

The reinforcing agent is any one or a combination of silicate and phosphate. The filter aid is any one or a combination of aluminum sulfate and polyacryloyl. The mixing ratio of the reinforcing agent and the filter aid within the above-mentioned range has good water drainage during molding, and at the same time is conducive to improving the wet strength of the wet paper sprue pipe parts.

The flame retardant is one or a combination of aluminum hydroxide and phosphorus flame retardants. The flame retardant within the above range can effectively prevent the cracking of related organic matter.

The flux is any one or a combination of sodium oxide, sodium fluoroaluminate and borax.

The invention also discloses a method for manufacturing a paper sprue pipe part for steel casting, which includes the following steps:

Provide inorganic sintered powder materials, organic fibers, inorganic fibers, thermosetting materials, binders, waterproof and moisture-proof agents, reinforcing agents, filter aids, fluxes and flame retardants, and weigh the required materials;

Pulping and blending of the materials prepared in proportion;

Mechanically shape the material after slurry adjustment through a forming mold to form a wet paper body of a paper sprue tube for steel casting;

Dry the wet paper body of the paper sprue tube for steel casting;

The dried paper sprue tube for steel casting is hot-pressed and shaped by the shaping mold to become the paper sprue tube for steel casting;

Cool naturally to room temperature, inspect and pack for storage.

Example 1:

Take 22.0% organic fiber [(old newspapers, old books, waste cartons, etc.) or wood pulp board by weighing according to the mass percentage. 】;

8.0% inorganic fiber (glass fiber, aluminum silicate fiber, slag wool, rock wool, carbon fiber.); 52.0% inorganic sintered powder material (mullite, high alumina clay, attapulgite, montmorillonite, bentonite, high aluminum powder, quartz, volcanic rock, graphite.);

13.0% inorganic thermosetting material (aluminum polyhydrogen phosphate, aluminum hydroxide, phosphoric acid, aluminum phosphate aluminum silicate.);

2.0% binder (sodium silicate, alumina cement, gypsum, magnesium cement, silicate, phosphate, colloidal silica.);

0.8% waterproof and moisture-proof agent (aluminum sulfate, polyvinyl alcohol, polypropylene, polyethylene.);

1.2% enhancer and filter aid (silicate, phosphate, polyacrylamide, modified starch, carboxymethylcellulose talc, aluminum sulfate.);

1% flux (sodium oxide, sodium fluoroaluminate, borax.);

Total 100%.

The above materials are made into a 0.5-1.5% slurry, and put into the slurry tank for standby. The slurry in the slurry tank enters the slurry tank of the forming mold, and the forming machine makes the wet paper body of the paper sprue tube for steel casting through vacuum adsorption, and the wet paper body of the paper sprue tube for steel casting is dried and made wet. The dry paper body of the paper sprue tube for steel casting with a water content of 40-50% is hot-pressed and formed into a paper sprue tube for steel casting through a shaping mold, and it is naturally cooled to At room temperature, inspect and pack for storage.

Example 2:

Take 20.0% organic fiber [(old newspapers, old books, waste cartons, etc.) or wood pulp board by weighing according to the mass percentage. 】;

6.0% inorganic fiber (glass fiber, aluminum silicate fiber, slag wool, rock wool, carbon fiber.);

58.0% inorganic sintered powder materials (mullite, high alumina clay, attapulgite, montmorillonite, bentonite, high alumina powder, quartz, volcanic rock, graphite.);

11.0% Inorganic (organic) thermosetting materials aluminum polyhydrogen phosphate, aluminum hydroxide, phosphoric acid, aluminum phosphate aluminum silicate, phenolic resin. );

2.0% binder (sodium silicate, alumina cement, gypsum, magnesium cement, silicate, phosphate, colloidal silica.);

0.8% waterproof and moisture-proof agent (aluminum sulfate, polyvinyl alcohol, polypropylene, polyethylene.);

1.2% enhancer and filter aid (silicate, phosphate, polyacrylamide, modified starch, carboxymethylcellulose talc, aluminum sulfate talc, aluminum sulfate.);

1% flux (sodium oxide, sodium fluoroaluminate, borax.);

Total 100%.

The above materials are made into a 0.5-1.5% slurry, and put into the slurry tank for standby. The slurry in the slurry tank enters the slurry tank of the forming mold, and the forming machine makes the wet paper body of the paper sprue tube for steel casting through vacuum adsorption, and the wet paper body of the paper sprue tube for steel casting is dried and made wet. The dry paper body of the paper sprue tube for steel casting with a water content of 40-50% is hot-pressed and formed into a paper sprue tube for steel casting through a shaping mold, and it is naturally cooled to At room temperature, inspect and pack for storage.

Example 3:

Take 22.0% organic fiber [(old newspapers, old books, waste cartons, etc.) or wood pulp board by weighing according to the mass percentage. 】;

7.0% inorganic fiber (glass fiber, aluminum silicate fiber, slag wool, rock wool, carbon fiber.);

51.0% inorganic sintered powder materials (mullite, high alumina clay, attapulgite, montmorillonite, bentonite, high alumina powder, quartz, volcanic rock, graphite.);

14% inorganic (organic) thermosetting material (phenolic resin, aluminum polyhydrogen phosphate, aluminum hydroxide, phosphoric acid, aluminum phosphate, aluminum silicate.);

3.0% binder (phenolic resin, modified starch, carboxymethyl fiber, polyvinyl alcohol, polyacrylamide, sodium silicate, alumina cement, silicate, phosphate, colloidal silica.);

0.8% waterproof and moisture-proof agent (aluminum sulfate, polyvinyl alcohol, polypropylene, polyethylene.);

1.2% enhancer and filter aid (silicate, phosphate, polyacrylamide, modified starch, carboxymethylcellulose talc, aluminum sulfate, talc, aluminum sulfate.);

1% flux (sodium oxide, sodium fluoroaluminate, borax.);

2.0% flame retardant (aluminum hydroxide, phosphorus flame retardant.);

Total 100%.

The above materials are made into a 0.5-1.5% slurry, and put into the slurry tank for standby. The slurry in the slurry tank enters the slurry tank of the forming mold, and the forming machine makes the wet paper body of the paper sprue tube for steel casting through vacuum adsorption, and the wet paper body of the paper sprue tube for steel casting is dried and made wet. The dry paper body of the paper sprue tube for steel casting with a water content of 40-50% is hot-pressed and formed into a paper sprue tube for steel casting through a shaping mold, and it is naturally cooled to At room temperature, inspect and pack for storage.

Example 4:

Take 20.0% organic fiber [(old newspapers, old books, waste cartons, etc.) or wood pulp board by weighing according to the mass percentage. 】;

6.0% inorganic fiber (glass fiber, aluminum silicate fiber, slag wool, rock wool, carbon fiber.);

56.0% inorganic sintered powder materials (mullite, high alumina clay, attapulgite, montmorillonite, bentonite, high alumina powder, quartz, volcanic rock, graphite.);

11.0% heat curing material (phenolic resin, aluminum polyhydrogen phosphate, aluminum hydroxide, phosphoric acid, aluminum phosphate, aluminum silicate.);

2.0% binder (phenolic resin, sodium silicate, alumina cement, gypsum, magnesium cement, silicate, phosphate, colloidal silica.);

0.8% waterproof and moisture-proof agent (aluminum sulfate, PVA (polyvinyl alcohol), polypropylene, polyethylene.);

1.2% enhancer and filter aid [PVM (polyacrylamide) talc, aluminum sulfate. 】;

1.0% Flux Sodium Oxide, Sodium Fluoroaluminate, Borax. );

2.0% flame retardant (aluminum hydroxide, phosphorus flame retardant.);

Total 100%.

The above-mentioned materials are made into 0.5-1.0% slurry, and put into the slurry tank for standby. The slurry in the slurry tank enters the slurry tank of the forming mold, and the forming machine makes the wet paper body of the paper sprue tube for steel casting through vacuum adsorption, and the wet paper body of the paper sprue tube for steel casting is dried and made wet. The dry paper body of the paper sprue tube for steel casting with a water content of 40-50% is hot-pressed and formed into a paper sprue tube for steel casting through a shaping mold, and it is naturally cooled to At room temperature, inspect and pack for storage.

The paper sprue pipe for cast steel casting and its manufacturing method provided by the present invention is a paper sprue pipe for casting made according to the pulp molding process technology, which has advantages compared with the refractory ceramic sprue pipe parts used so far. It has the advantages of light weight, easy operation, less waste and easy disposal after casting, labor saving, time saving, energy saving and environmental protection, no pollution to the environment, and environmental friendliness.

The above-described embodiments are only preferred embodiments of the present invention, and are not intended to limit the scope of the present invention, so all equivalent changes made with the contents of the claims of the present invention should be included within the scope of the claims of the present invention .

Claims (9)

1. The paper runner pipe part for cast steel casting is characterized by being prepared from the following raw materials, by mass, 1-70% of inorganic sintered powder material, 1-40% of organic fiber, 1-20% of inorganic fiber, 1-25% of thermosetting material, 1-10% of binder, 1-5% of waterproof and moistureproof agent, 1-5% of reinforcing agent and filter aid, 1-5% of fluxing agent and 0-5% of flame retardant;

wherein,

the inorganic sintering powder material is a combination of any several of mullite, high alumina clay, attapulgite, montmorillonite, bentonite, high alumina powder, quartz, volcanic rock and graphite;

the organic fiber is waste newspaper or wood pulp board;

the thermosetting material is any one or combination of any more of sodium silicate, aluminum phosphate cement, gypsum, magnesium cement, silicate, phosphate, colloidal silica, a reactive adhesive and phenolic resin;

the binder is any one or the combination of two of aluminum dihydrogen phosphate and carboxymethyl cellulose.

2. The paper-made runner pipe part for cast steel casting as claimed in claim 1, which is prepared from, by mass, 40-70% of inorganic sintered powder material, 1-30% of organic fiber, 1-15% of inorganic fiber, 1-20% of thermosetting material, 1-10% of binder, 1-5% of waterproof and moisture-proof agent, 1-3% of reinforcing agent and filter aid, 1-3% of flux, and 0-3% of flame retardant.

3. The paper-made runner pipe part for cast steel casting as claimed in claim 2, which is prepared from 50-70% by mass of inorganic sintered powder material, 5-25% by mass of organic fiber, 2-10% by mass of inorganic fiber, 3-20% by mass of thermosetting material, 1-5% by mass of binder, 1-3% by mass of moisture-proof agent, 1-3% by mass of reinforcing agent and filter aid, 1-3% by mass of flux, and 0-3% by mass of flame retardant.

4. The cast-steel casting paper runner pipe component as claimed in claim 3, wherein the inorganic fiber is one or a combination of any of glass fiber, aluminum silicate fiber, rock wool, slag wool and carbon fiber.

5. The cast-steel casting paper runner pipe component as claimed in claim 4, wherein the moisture and water proofing agent is any one or a combination of any several of aluminum sulfate, polyethylene alcohol, polypropylene and polyethylene.

6. The paper runner pipe component for cast-steel casting as claimed in claim 5, wherein the reinforcing agent is one or a combination of two of a silicate and a phosphate.

7. The cast-steel casting paper runner pipe part as claimed in claim 6, wherein the filter aid is one or a combination of aluminum sulfate and polyacrylic.

8. The cast-steel casting paper runner pipe part as claimed in claim 7, wherein the flame retardant is one or a combination of aluminum hydroxide and a phosphorus flame retardant.

9. The paper runner pipe component for cast-steel casting as claimed in claim 8, wherein the fluxing agent is any one or a combination of two of sodium oxide, sodium fluoroaluminate, and borax.