阅读说明：本技术 一种新型覆膜砂水性防脉纹涂料的配方 (Formula of novel precoated sand water-based vein-proof coating ) 是由 刘聪 于 2020-12-24 设计创作，主要内容包括：本发明是一种新型覆膜砂水性防脉纹涂料的配方,包括悬浮剂、粘结剂、表面活性剂、防腐剂、粉料和载体。本发明选择细粒度的锂辉石粉、云母粉、石墨粉、硅藻土粉、莫来石粉和铁红粉作为耐火骨料,具有高渗透性、激冷性好、绝热性好和烧结性优良,可以满足铸件砂型的防脉纹机理。本发明为水基浸涂涂料,从而减轻或消除铸件内腔脉纹缺陷。(The invention relates to a formula of a novel precoated sand water-based vein-proof coating, which comprises a suspending agent, a binder, a surfactant, a preservative, powder and a carrier. The invention selects the fine-grained spodumene powder, mica powder, graphite powder, diatomite powder, mullite powder and iron oxide red powder as the refractory aggregate, has high permeability, good chilling property, good heat insulation property and excellent sintering property, and can meet the vein-preventing mechanism of the casting sand mold. The invention is a water-based dip coating, thereby reducing or eliminating the vein defect of the inner cavity of the casting.)

1. The formula of the novel precoated sand water-based vein-proof coating is characterized by comprising a suspending agent, a binder, a surfactant, a preservative, powder and a carrier;

the suspending agent comprises the following raw materials in parts by weight: 3-8 parts of lithium bentonite, 1-5 parts of modified magnesium aluminum silicate A-50 and 1-5 parts of sodium bentonite;

the binder comprises the following raw materials in parts by weight: 1-5 parts of polyvinyl alcohol, 0.1-1 part of polyvinyl acetate emulsion and 1-5 parts of modified starch;

the powder comprises the following raw materials in parts by weight: 5-10 parts of mica powder, 10-20 parts of spodumene powder, 15-25 parts of graphite powder, 15-25 parts of mullite powder, 25-35 parts of diatomite powder and 1-10 parts of iron oxide red powder;

the surfactant comprises the following raw materials in parts by weight: 0.1-0.5 part of E-42, 0.1-0.5 part of A-12 and 0.1-0.3 part of JFC-1;

the carrier is 50 parts by weight of demineralized water.

2. The formula of the novel precoated sand water-based vein-proof coating as claimed in claim 1, wherein the preservative comprises the following raw materials in parts by weight: 0.1-0.3 part of potassium sorbate and 0.1-0.3 part of Q-301B.

3. The formula of the novel precoated sand water-based vein-proof coating according to claim 1, wherein the powder comprises the following raw materials in parts by weight: 10 parts of mica powder, 15 parts of spodumene powder, 20 parts of graphite powder, 20 parts of mullite powder, 30 parts of kieselguhr powder and 5 parts of iron oxide red powder.

4. The formulation of the novel precoated sand water-based vein-proof coating according to claim 3, wherein the average particle size of the powder is less than 0.2 mm.

5. The formula of the novel precoated sand water-based vein-proof coating according to claim 1, wherein the binder comprises the following raw materials in parts by weight: 2.5 parts of polyvinyl alcohol, 0.2 part of polyvinyl acetate emulsion and 3 parts of modified starch.

Technical Field

The invention relates to the technical field of casting, in particular to a formula of a novel precoated sand water-based vein-proof coating.

Background

The cold-box resin sand or the phenolic resin coated sand is adopted to produce the iron casting, has the characteristics of accurate size, low surface roughness and the like of the produced casting, and is widely applied to casting production for many years. However, when the resin sand is used for producing iron castings such as engine cylinder bodies and cylinder covers, the vein defects of the inner cavity of the castings are frequent. The vein defect is reduced or eliminated, which is a problem to be solved urgently in casting production.

Disclosure of Invention

The invention aims to solve the defects of the prior art and provides a formula of a novel precoated sand water-based vein-proof coating, which is a water-based dip coating with good comprehensive performance, so that the vein defect is reduced or eliminated.

In order to achieve the purpose, the invention adopts the following technical scheme: the formula of the novel precoated sand water-based vein-preventing coating comprises a suspending agent, a binder, a surfactant, a preservative, powder and a carrier;

the suspending agent comprises the following raw materials in parts by weight: 3-8 parts of lithium bentonite, 1-5 parts of modified magnesium aluminum silicate A-50 and 1-5 parts of sodium bentonite;

the binder comprises the following raw materials in parts by weight: 1-5 parts of polyvinyl alcohol, 0.1-1 part of polyvinyl acetate emulsion and 1-5 parts of modified starch;

the powder comprises the following raw materials in parts by weight: 5-10 parts of mica powder, 10-20 parts of spodumene powder, 15-25 parts of graphite powder, 15-25 parts of mullite powder, 25-35 parts of diatomite powder and 1-10 parts of iron oxide red powder;

the surfactant comprises the following raw materials in parts by weight: 0.1-0.5 part of E-42, 0.1-0.5 part of A-12 and 0.1-0.3 part of JFC-1;

the carrier is 50 parts by weight of demineralized water.

Particularly, the preservative comprises the following raw materials in parts by weight: 0.1-0.3 part of potassium sorbate and 0.1-0.3 part of Q-301B.

Particularly, the powder comprises the following raw materials in parts by weight: 10 parts of mica powder, 15 parts of spodumene powder, 20 parts of graphite powder, 20 parts of mullite powder, 30 parts of kieselguhr powder and 5 parts of iron oxide red powder.

In particular, the average particle size of the powder is less than 0.2 mm.

Particularly, the binder comprises the following raw materials in parts by weight: 2.5 parts of polyvinyl alcohol, 0.2 part of polyvinyl acetate emulsion and 3 parts of modified starch.

The invention has the beneficial effects that: the invention selects the fine-grained spodumene powder, mica powder, graphite powder, diatomite powder, mullite powder and iron oxide red powder as the refractory aggregate, has high permeability, good chilling property, good heat insulation property and excellent sintering property, and can meet the vein-preventing mechanism of the casting sand mold. The invention is a water-based dip coating, thereby reducing or eliminating the vein defect of the inner cavity of the casting.

Detailed Description

The invention will be further illustrated with reference to specific examples:

the formula of the novel precoated sand water-based vein-preventing coating comprises a suspending agent, a binder, a surfactant, a preservative, powder and a carrier;

the suspending agent comprises the following raw materials in parts by weight: 3-8 parts of lithium bentonite, 1-5 parts of modified magnesium aluminum silicate A-50 and 1-5 parts of sodium bentonite;

the binder comprises the following raw materials in parts by weight: 1-5 parts of polyvinyl alcohol, 0.1-1 part of polyvinyl acetate emulsion and 1-5 parts of modified starch;

the powder comprises the following raw materials in parts by weight: 5-10 parts of mica powder, 10-20 parts of spodumene powder, 15-25 parts of graphite powder, 15-25 parts of mullite powder, 25-35 parts of diatomite powder and 1-10 parts of iron oxide red powder; the diatomite powder has strong heat insulation performance and the mica powder has good chilling property so as to meet the vein-preventing mechanism of the casting sand mold;

the surfactant comprises the following raw materials in parts by weight: 0.1-0.5 part of E-42, 0.1-0.5 part of A-12 and 0.1-0.3 part of JFC-1;

the carrier is 50 parts by weight of demineralized water.

Particularly, the preservative comprises the following raw materials in parts by weight: 0.1-0.3 part of potassium sorbate and 0.1-0.3 part of Q-301B.

Particularly, the powder comprises the following raw materials in parts by weight: 10 parts of mica powder, 15 parts of spodumene powder, 20 parts of graphite powder, 20 parts of mullite powder, 30 parts of kieselguhr powder and 5 parts of iron oxide red powder.

In particular, the average particle size of the powder is less than 0.2 mm.

Particularly, the binder comprises the following raw materials in parts by weight: 2.5 parts of polyvinyl alcohol, 0.2 part of polyvinyl acetate emulsion and 3 parts of modified starch.

Example 1

The formula of the novel precoated sand water-based vein-preventing coating comprises a suspending agent, a binder, a surfactant, a preservative, powder and a carrier;

the suspending agent comprises the following raw materials in parts by weight: 5 parts of lithium bentonite, 3 parts of modified magnesium aluminum silicate A-50 and 2 parts of sodium bentonite;

the binder comprises the following raw materials in parts by weight: 2.5 parts of polyvinyl alcohol, 0.2 part of polyvinyl acetate emulsion and 3 parts of modified starch;

the surfactant comprises the following raw materials in parts by weight: 0.2 part of E-42, 0.2 part of A-12 and 0.1 part of JFC-1;

the preservative comprises the following raw materials in parts by weight: 0.1 part of potassium sorbate and 0.2 part of Q-301B;

the powder comprises the following raw materials in parts by weight: 10 parts of mica powder, 15 parts of spodumene powder, 20 parts of graphite powder, 20 parts of mullite powder, 30 parts of kieselguhr powder and 5 parts of iron oxide red powder;

the carrier is 50 parts by weight of demineralized water.

In particular, the average particle size of the powder is less than 0.2 mm.

Example 2

The formula of the novel precoated sand water-based vein-preventing coating comprises a suspending agent, a binder, a surfactant, a preservative, powder and a carrier;

the suspending agent comprises the following raw materials in parts by weight: 3 parts of lithium bentonite, 1 part of modified magnesium aluminum silicate A-50 and 1 part of sodium bentonite;

the binder comprises the following raw materials in parts by weight: 1 part of polyvinyl alcohol, 0.1-1 part of polyvinyl acetate emulsion and 1 part of modified starch;

the powder comprises the following raw materials in parts by weight: 5 parts of mica powder, 10 parts of spodumene powder, 15 parts of graphite powder, 15 parts of mullite powder, 25 parts of diatomite powder and 1 part of iron oxide red powder;

the surfactant comprises the following raw materials in parts by weight: 0.1 part of E-42, 0.1 part of A-12 and 0.1 part of JFC-1;

the carrier is 50 parts by weight of demineralized water.

Particularly, the preservative comprises the following raw materials in parts by weight: 0.1 part of potassium sorbate and 0.1 part of Q-301B.

In particular, the average particle size of the powder is less than 0.2 mm.

Example 3

The formula of the novel precoated sand water-based vein-preventing coating comprises a suspending agent, a binder, a surfactant, a preservative, powder and a carrier;

the suspending agent comprises the following raw materials in parts by weight: 8 parts of lithium bentonite, 5 parts of modified magnesium aluminum silicate A-50 and 5 parts of sodium bentonite;

the binder comprises the following raw materials in parts by weight: 5 parts of polyvinyl alcohol, 1 part of polyvinyl acetate emulsion and 5 parts of modified starch;

the powder comprises the following raw materials in parts by weight: 10 parts of mica powder, 20 parts of spodumene powder, 25 parts of graphite powder, 25 parts of mullite powder, 35 parts of kieselguhr powder and 10 parts of iron oxide red powder;

the surfactant comprises the following raw materials in parts by weight: 0.5 part of E-42, 0.5 part of A-12 and 0.3 part of JFC-1;

the carrier is 50 parts by weight of demineralized water.

Particularly, the preservative comprises the following raw materials in parts by weight: 0.3 part of potassium sorbate and 0.3 part of Q-301B.

In particular, the average particle size of the powder is less than 0.2 mm.

The present invention has been described in connection with the specific embodiments, and it is obvious that the specific implementation of the present invention is not limited by the above-mentioned manner, and it is within the protection scope of the present invention as long as various modifications are made by using the method concept and technical solution of the present invention, or the present invention is directly applied to other occasions without modification.