阅读说明：本技术 一种防气孔产生的砂型铸造涂料 (Sand casting coating capable of preventing air holes from being generated ) 是由 陈敏 李廷珍 高文建 于 2021-08-20 设计创作，主要内容包括：本发明公开了一种防气孔产生的砂型铸造涂料,属于特种涂料生产技术领域,硅酸锆粉和氧化铁、高温氧化助熔剂分别利用筛分机对其进行筛分,得到更为细小均匀的粉末状硅酸锆粉和氧化铁、高温氧化助熔剂,将粉末状硅酸锆粉和氧化铁、高温氧化助熔剂导入混研机中,对其混合搅拌,得到混合基料,向混合基料内依次添加活性助熔剂、粘结剂、悬浮剂、表面添加剂和乙醇。本发明通过添加的氧化铁和活性高温氧化助熔剂,从而采用高活性硅酸锆及高温氧化剂材料,在高温下,使涂料在受热熔融,形成致密屏蔽涂料,减少气体对金属液的渗入,且使用活性涂料,增加涂料在高温下的烧结能力,形成液态涂料膜,有效屏蔽气体进入金属液,提高了后期使用铸件的稳定性。(The invention discloses a sand casting coating for preventing pores from being generated, which belongs to the technical field of special coating production. According to the invention, by adding the iron oxide and the active high-temperature oxidation fluxing agent, the high-activity zirconium silicate and the high-temperature oxidant material are adopted, so that the coating is heated and melted at high temperature to form a compact shielding coating, the infiltration of gas into the molten metal is reduced, the sintering capacity of the coating at high temperature is increased by using the active coating, a liquid coating film is formed, the gas is effectively shielded from entering the molten metal, and the stability of a casting used at the later stage is improved.)

1. The utility model provides a sand casting coating that gas pocket produced which characterized in that: the specific process comprises the following steps:

preparing the following raw materials, namely 40-70 parts of zirconium silicate powder, 1-15 parts of ferric oxide, 1-15 parts of high-temperature oxidation fluxing agent, 1-10 parts of active fluxing agent, 1-9 parts of binder, 2-10 parts of suspending agent, 1-10 parts of surface additive and 20-40 parts of ethanol;

screening the zirconium silicate powder, the iron oxide and the high-temperature oxidation fluxing agent by using a screening machine respectively to obtain finer and more uniform powdery zirconium silicate powder, iron oxide and the high-temperature oxidation fluxing agent;

thirdly, introducing the powdery zirconium silicate powder, the ferric oxide and the high-temperature oxidation fluxing agent into a mixing and grinding machine, and mixing and stirring the powdery zirconium silicate powder, the ferric oxide and the high-temperature oxidation fluxing agent to obtain a mixed base material;

sequentially adding an active fluxing agent, a binder, a suspending agent, a surface additive and ethanol into the mixed base material, mixing and grinding the mixture, then introducing the mixed and ground materials into a high-speed dispersing machine, and adding ethanol again for stirring;

and step five, cooling the mixed and ground materials while stirring, preventing temperature rise, and fully and uniformly dispersing the materials to obtain the casting coating.

2. The air vent generation preventing sand casting coating according to claim 1, wherein: preparing the following raw materials, 40-70 parts of zirconium silicate powder, 1-9 parts of binder, 2-10 parts of suspending agent, 1-10 parts of surface additive and 20-40 parts of ethanol.

3. The air vent generation preventing sand casting coating according to claim 1, wherein: preparing the following raw materials, 60 parts of zirconium silicate powder, 1-10 parts of active fluxing agent, 1-9 parts of binder, 2-10 parts of suspending agent, 1-10 parts of surface additive and 20-40 parts of ethanol.

4. The air vent generation preventing sand casting coating according to claim 1, wherein: preparing the following raw materials, 60 parts of zirconium silicate powder, 1-15 parts of ferric oxide, 1-9 parts of binder, 2-10 parts of suspending agent, 1-10 parts of surface additive and 20-40 parts of ethanol.

Technical Field

The invention relates to the technical field of paint production, in particular to a sand casting paint capable of preventing air holes from being generated.

Background

The casting coating comprises a refractory filler, a solvent, a binder, a suspending agent and a surface additive, and the casting coated sand resin process comprises the following steps: in the core production process, sand grains react with resin coated on the surface of the sand grains to generate cohesive force, and the middle part of a sand core prepared in the coated sand resin sand cannot be safely solidified during core production, so that the reaction rate is reduced.

Disclosure of Invention

The invention aims to: in order to solve the problem, the sand casting coating for preventing the generation of air holes is provided.

In order to achieve the purpose, the invention provides the following technical scheme: a sand casting coating for preventing air holes from being generated comprises the following steps:

preparing the following raw materials, namely 40-70 parts of zirconium silicate powder, 1-15 parts of ferric oxide, 1-15 parts of high-temperature oxidation fluxing agent, 1-10 parts of active fluxing agent, 1-9 parts of binder, 2-10 parts of suspending agent, 1-10 parts of surface additive and 20-40 parts of ethanol;

screening the zirconium silicate powder, the iron oxide and the high-temperature oxidation fluxing agent by using a screening machine respectively to obtain finer and more uniform powdery zirconium silicate powder, iron oxide and the high-temperature oxidation fluxing agent;

thirdly, introducing the powdery zirconium silicate powder, the ferric oxide and the high-temperature oxidation fluxing agent into a mixing and grinding machine, and mixing and stirring the powdery zirconium silicate powder, the ferric oxide and the high-temperature oxidation fluxing agent to obtain a mixed base material;

step four, sequentially adding an active fluxing agent, a binder, a suspending agent, a surface additive and ethanol into the mixed base material, mixing and grinding the mixture, then introducing the mixed and ground materials into a high-speed dispersion machine, adding ethanol again and stirring to obtain a casting coating;

and step five, cooling the mixed and ground materials while stirring, preventing temperature rise, and fully and uniformly dispersing the materials to obtain the casting coating.

Preferably, the following raw materials, 40-70 parts of zirconium silicate powder, 1-9 parts of binder, 2-10 parts of suspending agent, 1-10 parts of surface additive and 20-40 parts of ethanol are prepared.

Preferably, 60 parts of zirconium silicate powder, 1-10 parts of active fluxing agent, 1-9 parts of binder, 2-10 parts of suspending agent, 1-10 parts of surface additive and 20-40 parts of ethanol are prepared.

Preferably, 60 parts of zirconium silicate powder, 1-15 parts of ferric oxide, 1-9 parts of binder, 2-10 parts of suspending agent, 1-10 parts of surface additive and 20-40 parts of ethanol are prepared.

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

1. according to the invention, in the cooling process of the casting, the shrinkage rate of the coating layer is different from that of the metal casting, so that the coating layer can be easily stripped from the surface of the metal casting to form a smooth casting surface, the middle part of the sand core can be safely solidified, and the reaction rate is improved;

2. according to the invention, by adding the iron oxide and the active fluxing agent, the high-activity zirconium silicate and the high-temperature oxidant material are adopted, the coating is heated and melted at high temperature to form a compact shielding coating, so that the permeation of gas into molten metal is reduced, the sintering capacity of the coating at high temperature is increased by using the active coating, a liquid coating film is formed, the gas is effectively shielded from entering the molten metal, the material quality of the casting is improved, and the stability of the casting used at the later stage is improved.

Detailed Description

The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.

Example 1

As a preferred embodiment of the present invention, a sand casting coating material for preventing generation of pores is characterized in that: the specific process comprises the following steps:

preparing the following raw materials, namely 40-70 parts of zirconium silicate powder, 1-15 parts of ferric oxide, 1-15 parts of high-temperature oxidation fluxing agent, 1-10 parts of active fluxing agent, 1-9 parts of binder, 2-10 parts of suspending agent, 1-10 parts of surface additive and 20-40 parts of ethanol;

screening the zirconium silicate powder, the iron oxide and the high-temperature oxidation fluxing agent by using a screening machine respectively to obtain finer and more uniform powdery zirconium silicate powder, iron oxide and the high-temperature oxidation fluxing agent;

thirdly, introducing the powdery zirconium silicate powder, the ferric oxide and the high-temperature oxidation fluxing agent into a mixing and grinding machine, and mixing and stirring the powdery zirconium silicate powder, the ferric oxide and the high-temperature oxidation fluxing agent to obtain a mixed base material;

sequentially adding an active fluxing agent, a binder, a suspending agent, a surface additive and ethanol into the mixed base material, mixing and grinding the mixture, then introducing the mixed and ground materials into a high-speed dispersing machine, and adding ethanol again for stirring;

and step five, cooling the mixed and ground materials while stirring, preventing temperature rise, and fully and uniformly dispersing the materials to obtain the casting coating.

According to the invention, by adding the iron oxide and the active fluxing agent, the high-activity zirconium silicate and the high-temperature oxidant material are adopted, the coating is heated and melted at high temperature to form a compact shielding coating, so that the permeation of gas into molten metal is reduced, the sintering capacity of the coating at high temperature is increased by using the active coating, a liquid coating film is formed, the gas is effectively shielded from entering the molten metal, the material quality of the casting is improved, and the stability of the casting used at the later stage is improved.

Example 2

As a preferred embodiment of the invention, the specific process comprises the following steps:

preparing the following raw materials, namely 40-70 parts of zirconium silicate powder, 1-9 parts of a binder, 2-10 parts of a suspending agent, 1-10 parts of a surface additive and 20-40 parts of ethanol;

screening the zirconium silicate powder, the iron oxide and the high-temperature oxidation fluxing agent by using a screening machine respectively to obtain finer and more uniform powdery zirconium silicate powder, iron oxide and the high-temperature oxidation fluxing agent;

thirdly, introducing the powdery zirconium silicate powder, the ferric oxide and the high-temperature oxidation fluxing agent into a mixing and grinding machine, and mixing and stirring the powdery zirconium silicate powder, the ferric oxide and the high-temperature oxidation fluxing agent to obtain a mixed base material;

sequentially adding an active fluxing agent, a binder, a suspending agent, a surface additive and ethanol into the mixed base material, mixing and grinding the mixture, then introducing the mixed and ground materials into a high-speed dispersing machine, and adding ethanol again for stirring;

and step five, cooling the mixed and ground materials while stirring, preventing temperature rise, and fully and uniformly dispersing the materials to obtain the casting coating.

According to the invention, no iron oxide and active fluxing agent are added, so that the middle part of the prepared sand core cannot be safely solidified, is not convenient to strip, and cannot ensure the smoothness of the surface of the casting.

Example 3

As a preferred embodiment of the invention, the specific process comprises the following steps:

preparing the following raw materials, namely 60 parts of zirconium silicate powder, 1-10 parts of active fluxing agent, 1-9 parts of binder, 2-10 parts of suspending agent, 1-10 parts of surface additive and 20-40 parts of ethanol;

screening the zirconium silicate powder, the iron oxide and the high-temperature oxidation fluxing agent by using a screening machine respectively to obtain finer and more uniform powdery zirconium silicate powder, iron oxide and the high-temperature oxidation fluxing agent;

thirdly, introducing the powdery zirconium silicate powder, the ferric oxide and the high-temperature oxidation fluxing agent into a mixing and grinding machine, and mixing and stirring the powdery zirconium silicate powder, the ferric oxide and the high-temperature oxidation fluxing agent to obtain a mixed base material;

sequentially adding an active fluxing agent, a binder, a suspending agent, a surface additive and ethanol into the mixed base material, mixing and grinding the mixture, then introducing the mixed and ground materials into a high-speed dispersing machine, and adding ethanol again for stirring;

and step five, cooling the mixed and ground materials while stirring, preventing temperature rise, and fully and uniformly dispersing the materials to obtain the casting coating.

According to the invention, the active coating is used, so that the sintering capacity of the coating at high temperature is increased, a liquid coating film is formed, gas is effectively shielded from entering molten metal, and the material quality of the casting is improved, so that the stability of the casting used in the later period is improved.

Example 4

As a preferred embodiment of the invention, the specific process comprises the following steps:

step one, 60 parts of zirconium silicate powder, 1-15 parts of ferric oxide, 1-9 parts of binder, 2-10 parts of suspending agent, 1-10 parts of surface additive and 20-40 parts of ethanol;

screening the zirconium silicate powder, the iron oxide and the high-temperature oxidation fluxing agent by using a screening machine respectively to obtain finer and more uniform powdery zirconium silicate powder, iron oxide and the high-temperature oxidation fluxing agent;

thirdly, introducing the powdery zirconium silicate powder, the ferric oxide and the high-temperature oxidation fluxing agent into a mixing and grinding machine, and mixing and stirring the powdery zirconium silicate powder, the ferric oxide and the high-temperature oxidation fluxing agent to obtain a mixed base material;

sequentially adding an active fluxing agent, a binder, a suspending agent, a surface additive and ethanol into the mixed base material, mixing and grinding the mixture, then introducing the mixed and ground materials into a high-speed dispersing machine, and adding ethanol again for stirring;

and step five, cooling the mixed and ground materials while stirring, preventing temperature rise, and fully and uniformly dispersing the materials to obtain the casting coating.

The invention adopts high-activity zirconium silicate and high-temperature oxidant material, so that the coating is heated and melted at high temperature to form compact shielding coating, thereby reducing the infiltration of gas to molten metal.

It will be evident to those skilled in the art that the invention is not limited to the details of the foregoing illustrative embodiments, and that the present invention may be embodied in other specific forms without departing from the spirit or essential attributes thereof. The present embodiments are therefore to be considered in all respects as illustrative and not restrictive, the scope of the invention being indicated by the appended claims rather than by the foregoing description, and all changes which come within the meaning and range of equivalency of the claims are therefore intended to be embraced therein. Any reference sign in a claim should not be construed as limiting the claim concerned.