阅读说明：本技术 一种消失模用铸铁涂料及其制备方法 (Cast iron coating for lost foam and preparation method thereof ) 是由 刘金鹏 于 2019-11-08 设计创作，主要内容包括：本发明公开了一种消失模用铸铁涂料,由以下按照重量份的原料组成：石英粉149000-151000份,莫来石49000-51000份,水139000-141000份,凹凸棒土5900-6100份,羧甲基纤维素纳2300-2500份,胶粘剂2400-2600份,碱性树脂4900-5100份,活性剂8-12份,木纤维5900-6100份,正辛醇8-12份,该消失模用铸铁涂料不仅可以在铸件和铸型中间起到阻挡隔离作用,达到防粘砂目的,还改善了附着力差、强度低、耐火差、发气量大的缺点,减少了铸件生产中出现的粘砂、砂眼、气孔、碳渣等缺陷问题,使得生产成品的合格率提高,避免了不必要的资源浪费,节约了生产的成本。(The invention discloses a cast iron coating for a lost foam, which is prepared from the following raw materials in parts by weight: 149000 parts of quartz powder, 151000 parts of mullite 49000 parts, 141000 parts of water 139000 parts, 6100 parts of attapulgite, 2500 parts of carboxymethyl cellulose 2300 parts, 2600 parts of adhesive 2400 parts, 5100 parts of basic resin 4900 parts, 8-12 parts of active agent, 6100 parts of wood fiber 5900 parts, and 8-12 parts of n-octanol.)

1. The cast iron coating for the lost foam is characterized by comprising the following raw materials in parts by weight: 149000 parts of quartz powder, 151000 parts of mullite 49000 parts, 141000 parts of water 139000 parts, 6100 parts of attapulgite 5900 parts, 2500 parts of sodium carboxymethylcellulose 2300 parts, 2600 parts of adhesive 2400 parts, 5100 parts of alkali resin 4900 parts, 8-12 parts of active agent, 6100 parts of wood fiber 5900 parts and 8-12 parts of n-octanol.

2. The cast iron coating for the lost foam according to claim 1, comprising the following raw materials in parts by weight: 149500 portions of quartz powder, 150500 portions of mullite 49500, 140500 portions of water 139500, 5950 portions of attapulgite, 2350 portions of sodium carboxymethyl cellulose, 2450 portions of adhesive 2450, 4950 portions of 5050 portions of alkali resin, 9-11 portions of activator, 5950 portions of 6050 portions of wood fiber and 9-11 portions of n-octanol.

3. The cast iron coating for the lost foam according to claim 1, comprising the following raw materials in parts by weight: 149800 parts of quartz powder 150200 parts, 49800 parts of mullite 50200 parts, 139800 parts of water 140200 parts, 5980 parts of attapulgite 6020 parts, 2380 parts of sodium carboxymethyl cellulose 2420 parts, 2480 parts of adhesive 2520 parts, 4980 parts of alkali resin 5020 parts, 9.5-10.5 parts of active agent, 5980 parts of wood fiber 6020 parts and 9.5-10.5 parts of n-octanol.

4. The cast iron coating for the lost foam according to claim 2, comprising the following raw materials in parts by weight: 150000 parts of quartz powder, 50000 parts of mullite, 140000 parts of water, 6000 parts of attapulgite, 2400 parts of sodium carboxymethyl cellulose, 2500 parts of adhesive, 5000 parts of alkaline resin, 10 parts of active agent, 6000 parts of wood fiber and 10 parts of n-octanol.

5. The cast iron coating for a lost foam according to claim 1, wherein the binder is a polyvinyl acetate binder.

6. The cast iron paint for a lost foam according to claim 1, wherein the cast iron paint for a lost foam is applied by a dip coating method in a thickness of 1.2 to 1.5 by brush coating.

7. The cast iron paint for a lost foam according to claim 1, wherein the drying temperature of the cast iron paint for a lost foam in use is 40 to 55 ℃.

8. A method for preparing a cast iron coating for a lost foam according to any of claims 1 to 7, comprising the steps of:

1) soaking the carboxymethylcellulose sodium in 39-41 parts of water for 11-13h, and stirring with a stirring vehicle of 2900-;

2) adding 39-41 parts of water into the attapulgite, and stirring into paste to obtain a second raw material;

3) adding the obtained raw material I and the raw material II into a stirrer, adding the rest of water, adding an adhesive, an alkaline resin, an active agent, n-octanol and wood fibers, and stirring for 19-21min to obtain a raw material III;

4) adding quartz powder and mullite into the raw material III, stirring for 2.5-3.5h, and standing for 9.5-10.5 h.

9. The method for preparing a cast iron paint for a lost foam according to claim 8, wherein the temperature of the water is 40-70 ℃.

Technical Field

The invention relates to an industrial coating, in particular to a cast iron coating for a lost foam and a preparation method thereof.

Background

The lost foam casting is full mold casting of the foam plastic mold by adopting binder-free dry sand combined with a vacuumizing technology. The domestic main calling methods comprise dry sand full mold casting and negative pressure full mold casting, lost foam casting is one of the most advanced casting processes in the world at present, is known as a revolution in casting history, and is called as 21 st century green casting at home and abroad.

Lost foam casting has entered a rapid growth period from the technological innovation period, from mass production to single-piece, small-batch production; from cast steel, gray iron castings to non-ferrous metal castings; from large to various sized castings; the application range of lost foam casting from large and medium-sized casting enterprises to medium and small casting enterprises is continuously expanded, foam plastics are frequently adopted as model materials of foam plastic models, the foam plastics are plastics taking synthetic resin as a base material and having countless micro-pore structures inside, the traditional casting coating only plays a role in blocking and isolating between a casting piece and a casting mould to achieve the purpose of preventing sand sticking, but the defects of sand sticking, sand holes, air holes, carbon slag and the like of the casting piece are easily caused by poor adhesion, low strength, poor fire resistance and large gas evolution amount of the common casting coating at high temperature, and the produced product has low qualification rate due to the defects of the problems of the casting coating in the existing casting process, so that the resource waste and the production cost are high.

Disclosure of Invention

The invention aims to provide a cast iron coating for a lost foam and a preparation method thereof, which aim to solve the problems in the background art.

In order to achieve the purpose, the invention provides the following technical scheme:

the cast iron coating for the lost foam comprises the following raw materials in parts by weight: 149000 parts of quartz powder, 151000 parts of mullite 49000 parts, 141000 parts of water 139000 parts, 6100 parts of attapulgite 5900 parts, 2500 parts of sodium carboxymethylcellulose 2300 parts, 2600 parts of adhesive 2400 parts, 5100 parts of alkali resin 4900 parts, 8-12 parts of active agent, 6100 parts of wood fiber 5900 parts and 8-12 parts of n-octanol.

As a further scheme of the invention: the feed comprises the following raw materials in parts by weight: 149500 portions of quartz powder, 150500 portions of mullite 49500, 140500 portions of water 139500, 5950 portions of attapulgite, 2350 portions of sodium carboxymethyl cellulose, 2450 portions of adhesive 2450, 4950 portions of 5050 portions of alkali resin, 9-11 portions of activator, 5950 portions of 6050 portions of wood fiber and 9-11 portions of n-octanol.

As a still further scheme of the invention: the feed comprises the following raw materials in parts by weight: 149800 parts of quartz powder 150200 parts, 49800 parts of mullite 50200 parts, 139800 parts of water 140200 parts, 5980 parts of attapulgite 6020 parts, 2380 parts of sodium carboxymethyl cellulose 2420 parts, 2480 parts of adhesive 2520 parts, 4980 parts of alkali resin 5020 parts, 9.5-10.5 parts of active agent, 5980 parts of wood fiber 6020 parts and 9.5-10.5 parts of n-octanol.

As a still further scheme of the invention: the feed comprises the following raw materials in parts by weight: 150000 parts of quartz powder, 50000 parts of mullite, 140000 parts of water, 6000 parts of attapulgite, 2400 parts of sodium carboxymethyl cellulose, 2500 parts of adhesive, 5000 parts of alkaline resin, 10 parts of active agent, 6000 parts of wood fiber and 10 parts of n-octanol.

As a still further scheme of the invention: the adhesive is polyvinyl acetate adhesive.

As a still further scheme of the invention: the thickness of the brush coating of the cast iron coating for the lost foam is 1.2-1.5, and a coating mode of dip coating is adopted.

As a still further scheme of the invention: the drying temperature of the cast iron coating for the lost foam is 40-55 ℃.

The preparation method of the cast iron coating for the lost foam comprises the following steps:

1) soaking the carboxymethylcellulose sodium in 39-41 parts of water for 11-13h, and stirring with a stirring vehicle of 2900-;

2) adding 39-41 parts of water into the attapulgite, and stirring into paste to obtain a second raw material;

3) adding the obtained raw material I and the raw material II into a stirrer, adding the rest of water, adding an adhesive, an alkaline resin, an active agent, n-octanol and wood fibers, and stirring for 19-21min to obtain a raw material III;

4) adding quartz powder and mullite into the raw material III, stirring for 2.5-3.5h, and standing for 9.5-10.5 h.

As a still further scheme of the invention: the temperature of the water is 40-70 ℃.

Compared with the prior art, the invention has the beneficial effects that: the cast iron coating for the lost foam not only can play a role in blocking and isolating between a casting and a casting mold to achieve the purpose of preventing sand adhesion, but also overcomes the defects of poor adhesion, low strength, poor fire resistance and large gas evolution, and reduces the defect problems of sand adhesion, sand holes, air holes, carbon slag and the like in the production of the casting, so that the qualification rate of the produced finished product is improved, unnecessary resource waste is avoided, and the production cost is saved.

Detailed Description

The technical solution of the present invention will be described in further detail with reference to specific embodiments.