阅读说明：本技术 一种用于砂型铸造模的环保脱模剂及其制备和使用方法 (A kind of environmentally friendly release agent and its preparation and application for sand casting mould ) 是由 柴知章 刘心悦 项利林 于 2019-09-30 设计创作，主要内容包括：本发明提供了一种用于砂型铸造模的环保脱模剂及其制备和使用方法,所述环保脱模剂包括以下重量百分比的原料：醋酸纤维素25％-30％,聚苯乙烯的二甲苯溶液35％-40％,有机膨润土5％-10％,甲基硅油2％-5％,醋酸甲酯2％-3％,高岭土0.5％-1％,滑石粉0.2％-0.8％,乙二醇2％-4％,乙酰柠檬三丁酯2％-3％,去离子水20％-25％；本发明提供的环保脱模剂的配方中,选用热稳定性良好及化学惰性的物质为原料,各原料配合作用,脱模性好且增加了成膜的光滑性及铸件表面的光滑性,而且不受环境因素的干扰。(The present invention provides a kind of environmentally friendly release agents and its preparation and application for sand casting mould, the environmental protection release agent includes the raw material of following weight percent: cellulose acetate 25%-30%, the xylene solution 35%-40% of polystyrene, organobentonite 5%-10%, methyl-silicone oil 2%-5%, methyl acetate 2%-3%, kaolin 0.5%-1%, talcum powder 0.2%-0.8%, ethylene glycol 2%-4%, acetyl tributylcitrate 2%-3%, deionized water 20%-25%；In the formula of environmental protection release agent provided by the invention, selecting good thermal stability and chemically inert substance is raw material, and each raw material mating reaction, release property is good and increases the slickness of the slickness of film forming and cast(ing) surface, and not by the interference of environmental factor.)

1. a kind of environmentally friendly release agent for sand casting mould, which is characterized in that the raw material including following weight percent: acetic acid Cellulose 25%-30%, the xylene solution 35%-40% of polystyrene, organobentonite 5%-10%, methyl-silicone oil 2%- 5%, methyl acetate 2%-3%, kaolin 0.5%-1%, talcum powder 0.2%-0.8%, ethylene glycol 2%-4%, acetyl lemon Tributyl 2%-3%, deionized water 20%-25%.

2. the environmentally friendly release agent according to claim 1 for sand casting mould, which is characterized in that including following weight hundred The raw material of point ratio: cellulose acetate 25%, the xylene solution 40% of polystyrene, organobentonite 5%, methyl-silicone oil 3%, Methyl acetate 2%, kaolin 0.5%, talcum powder 0.5%, ethylene glycol 2%, acetyl tributylcitrate 2%, deionized water 20%.

3. the environmentally friendly release agent according to claim 1 for sand casting mould, which is characterized in that including following weight hundred The raw material of point ratio: cellulose acetate 25%, the xylene solution 35% of polystyrene, organobentonite 5%, methyl-silicone oil 2%, Methyl acetate 2%, kaolin 1%, talcum powder 0.5%, ethylene glycol 2.5%, acetyl tributylcitrate 2%, deionized water 25%.

4. the environmentally friendly release agent according to claim 1 for sand casting mould, which is characterized in that including following weight hundred The raw material of point ratio: cellulose acetate 28%, the xylene solution 35% of polystyrene, organobentonite 7%, methyl-silicone oil 2%, Methyl acetate 3%, kaolin 0.5%, talcum powder 0.5%, ethylene glycol 2%, acetyl tributylcitrate 2%, deionized water 20%.

5. the environmentally friendly release agent according to claim 1 for sand casting mould, which is characterized in that including following weight hundred The raw material of point ratio: cellulose acetate 26%, the xylene solution 37% of polystyrene, organobentonite 7%, methyl-silicone oil 2%, Methyl acetate 3%, kaolin 0.5%, talcum powder 0.5%, ethylene glycol 2%, acetyl tributylcitrate 2%, deionized water 20%.

6. the environmentally friendly release agent of sand casting mould is used for described in -5 any one according to claim 1, which is characterized in that described In the xylene solution of polystyrene, the mass concentration of polystyrene is 20~35%.

7. the preparation method described in -6 any one for the environmentally friendly release agent of sand casting mould according to claim 1, special Sign is that the preparation method comprises the following steps:

(1) organobentonite of formula ratio, kaolin, talcum powder, ethylene glycol, methyl-silicone oil are put into emulsion dispersion machine and are mixed It closes, 20~30min of high-speed stirred；

(2) xylene solution of the cellulose acetate of formula ratio, methyl acetate, three ester of acetyl lemon fourth, polystyrene is mixed, It is put into step (1) after stirring and dissolving；

(3) it is eventually adding the deionized water of formula ratio, is stirred to uniformly mixed.

8. preparation method according to claim 7, which is characterized in that in step (1), the rate of the high-speed stirred is 1500-2000r/min。

9. the application method described in -6 any one for the environmentally friendly release agent of sand casting mould according to claim 1, special Sign is, before mold use, by the environmentally friendly release agent brushing or sprays to the surface of mold and core box, place 15~ 20min, mold can come into operation.

Technical field

The invention belongs to cast technical field of mold release, and in particular to a kind of environmentally friendly release agent for sand casting mould and Its preparation and application.

Background technique

Release agent plays important function in sand casting process, its effect is to aid in die modeling later from sand mold In smoothly take out, sand mold (core) hardening after molding, for reduce molding frictional force, need to die surface brushing cast release agent, Have certain thermal stability, mold, finished product and following process will not be had an impact, productivity can be effectively improved, improves warp Ji benefit.

Existing release agent is silicone oil system and wax system mostly, and the stability of emulsion of wax system is poor, can pollute mold, silicone oil system viscosity Greatly, mobility is bad, causes product surface uneven, while solvent is difficult to dry up.

Summary of the invention

In order to solve the above technical problems, the present invention provides a kind of for the environmentally friendly release agent of sand casting mould and its preparation And application method, release property are good, at low cost, easy to use.

The technical scheme adopted by the invention is as follows:

A kind of environmentally friendly release agent for sand casting mould, the raw material including following weight percent: cellulose acetate 25%-30%, the xylene solution 35%-40% of polystyrene, organobentonite 5%-10%, methyl-silicone oil 2%-5%, vinegar Sour methyl esters 2%-3%, kaolin 0.5%-1%, talcum powder 0.2%-0.8%, ethylene glycol 2%-4%, acetyl tributylcitrate 2%-3%, deionized water 20%-25%.

Further, it is preferable to be the raw material for including following weight percent: cellulose acetate 25%, the diformazan of polystyrene Benzole soln 40%, organobentonite 5%, methyl-silicone oil 3%, methyl acetate 2%, kaolin 0.5%, talcum powder 0.5%, second two Alcohol 2%, acetyl tributylcitrate 2%, deionized water 20%.

Further, it is preferable to be the raw material for including following weight percent: cellulose acetate 25%, the diformazan of polystyrene Benzole soln 35%, organobentonite 5%, methyl-silicone oil 2%, methyl acetate 2%, kaolin 1%, talcum powder 0.5%, ethylene glycol 2.5%, acetyl tributylcitrate 2%, deionized water: 25%.

Further, it is preferable to be the raw material for including following weight percent: cellulose acetate 28%, the diformazan of polystyrene Benzole soln 35%, organobentonite 7%, methyl-silicone oil 2%, methyl acetate 3%, kaolin 0.5%, talcum powder 0.5%, second two Alcohol 2%, acetyl tributylcitrate 2%, deionized water: 20%.

Further, it is preferable to be the raw material for including following weight percent: cellulose acetate 26%, the diformazan of polystyrene Benzole soln 37%, organobentonite 7%, methyl-silicone oil 2%, methyl acetate 3%, kaolin 0.5%, talcum powder 0.5%, second two Alcohol 2%, acetyl tributylcitrate 2%, deionized water: 20%.

In the xylene solution of the polystyrene, the mass concentration of polystyrene is 20~35%, by polystyrene head It is first dissolved in xylene solvent and is configured to solution, the uniformity that polystyrene disperses in system can be increased, and facilitate Organobentonite, kaolin, the emulsification of talcum powder are uniform.

The present invention also provides the preparation method of the environmentally friendly release agent for sand casting mould, the preparation method packets Include following steps:

(1) organobentonite of formula ratio, kaolin, talcum powder, ethylene glycol, methyl-silicone oil are put into emulsion dispersion machine Mixing, 20~30min of high-speed stirred；

(2) by the cellulose acetate of formula ratio, methyl acetate, three ester of acetyl lemon fourth, polystyrene xylene solution It mixes, is put into step (1) after stirring and dissolving；

(3) it is eventually adding the deionized water of formula ratio, is stirred to uniformly mixed.

Further, in step (1), the rate of the high-speed stirred is 1500-2000r/min.

The present invention also provides the application methods of the environmentally friendly release agent for sand casting mould are as follows: uses in mold Before, by the environmentally friendly release agent brushing or the surface of mold and core box is sprayed to, places 15~20min, mold can be thrown Enter to use.

Provided by the present invention in the formula of the environmentally friendly release agent of sand casting mould, each raw material effect is as follows:

Cellulose acetate: the demolding performace of cellulose acetate is good, and stability is good, and adhesiveness is good, to human body and environment without Evil, meets environmental protection concept.

The xylene solution of polystyrene: itself and cellulose acetate are used collectively as adhesive, and bond properties is good, And production cost is lower than existing adhesive, mitigates the pollution of environment.

Organobentonite: organobentonite can form gel in all kinds of organic solvents, oils, liquid resin, have good Thickening property well, thixotropy, suspension stability, high-temperature stability, lubricity, film forming, water resistance and chemical stability, and material Material is cheap, is suitble to use.

Methyl-silicone oil: increasing bentonite lubricity, act also as the effect of defoaming agent, low toxicity, environmental protection.

Methyl acetate: environmentally friendly solvent dissolves cellulose acetate.

Kaolin, talcum powder: it is high temperature resistant, corrosion-resistant, increase uniformity, the slickness of film forming.

Ethylene glycol: it is used as antifreezing agent, in winter under low temperature environment, the performance of general release agent will receive the shadow of low temperature It rings, ethylene glycol, which is added, can reduce the influence of environmental factor.

Acetyl tributylcitrate: it can be compatible with cellulose acetate, have antibiotic property, anti-flammability, degradability, resist cold and Anti-mildew, nonirritant, no pollution to the environment meets environmental protection concept.

Deionized water: diluting effect is played, avoids the viscosity of release agent excessive.

In the formula of environmental protection release agent provided by the invention, selects good thermal stability and chemically inert substance is original Material, each raw material mating reaction, release property is good and increases the slickness of the slickness of film forming and cast(ing) surface, and not by environment The defects of interference of factor, the cast(ing) surface produced using it is without sand holes, scab, burning into sand.

Compared with prior art, the present invention has following advantages:

(1) raw material sources are extensive, low in cost, using materials such as organobentonites, so that adhesive force improves, while Increase the slickness of film forming；

(2) cellulose acetate used in is a kind of environment-friendly materials, low to the pollution of environment, and cleans and be easy, will not There is adverse effect to mold and plastic products.

Specific embodiment

The following describes the present invention in detail with reference to examples.