CN112517834A

CN112517834A - Mixture for forming holes in casting molding and hole forming process

Info

Publication number: CN112517834A
Application number: CN202011306161.5A
Authority: CN
Inventors: 唐刚; 凌伟华
Original assignee: Shenzhen Hard Orange Industrial Co ltd
Current assignee: Shenzhen Hard Orange Industrial Co ltd
Priority date: 2020-11-19
Filing date: 2020-11-19
Publication date: 2021-03-19

Abstract

The invention discloses a mixture for forming holes in a casting molding, which consists of 80-96% of main filler, 3-5% of adhesive and 5-10% of breathable filler by weight. The invention discloses a process for forming holes by pouring forming objects, which comprises the following steps: (1) drying and forming the prepared mixture in any one of the technical schemes to obtain a hard filler; (2) filling a plurality of fillers in a forming mold, pouring a metal or polymer solution into the forming mold, and demolding after the solution is cooled and formed to obtain a formed object; (3) and cleaning the formed object to ensure that the filler filled in the formed object is melted and discharged. According to the invention, the hole structure is formed in the pouring forming object by filling the pouring forming object, the forming object has light weight and light transmittance, and the filler formed by the mixture can be quickly dissolved in water and cleaned up, so that the demoulding can be quickly carried out, and the production efficiency is improved.

Description

Mixture for forming holes in casting molding and hole forming process

Technical Field

The invention relates to a casting molding process, in particular to a mixture for forming holes in a casting molding product and a process for forming the holes.

Background

The casting is a formed article obtained by various casting methods, namely, the article with certain shape, size and performance is obtained by pouring smelted liquid solution into a prepared forming in advance by pouring, injecting, sucking or other pouring methods, cooling, grinding and other subsequent processing means. For some applications requiring different pore structures to be formed in the casting, the casting is usually molded using beeswax, and the loaf core is filled and coated with another refractory material. After heating and baking, the wax mold is completely melted and lost, so that the whole casting model becomes an empty shell. Pouring the molten liquid inwards to form the product. The ware cast by the lost wax method can be exquisite and transparent and has the effect of hollowing. However, sometimes the wax mold is easily adhered to the inner wall of the metal casting to affect the light transmittance of the metal casting, the wax mold is difficult to clean up at one time during demolding and needs to be cleaned up for many times, and the wax mold inside needs to be heated and melted, or the casting is heated, or a hot solution is filled, so that the demolding operation is very inconvenient and has certain limitation.

Disclosure of Invention

The invention aims to provide a mixture for forming holes in a casting forming object and a process for forming the holes.

In order to solve the technical problems, the technical scheme provided by the invention is as follows: a mixture for forming holes in a casting molding is composed of 80-96% of main filler, 3-5% of adhesive and 5-10% of breathable filler by weight.

Further, the main filler is composed of at least one of red sand, clay, yellow sand, quartz sand and sintered clay; the adhesive is composed of at least one of glutinous rice flour, bentonite and resin; the breathable filler consists of wood chips or natural plant chips.

Further, the content of the main filler was 92%, the content of the binder was 3%, and the content of the air-permeable filler was 5%.

Further, the content of the main filler was 85%, the content of the binder was 5%, and the content of the air-permeable filler was 10%.

The invention provides another technical scheme that: a process for forming holes by pouring molding comprises the following steps:

(1) drying and forming the prepared mixture in any one of the technical schemes to obtain a hard filler;

(2) filling a plurality of fillers in a forming mold, pouring a metal or polymer solution into the forming mold, and demolding after the solution is cooled and formed to obtain a formed object;

(3) and cleaning the formed object to ensure that the filler filled in the formed object is melted and discharged.

Further, in the step (2), the solution enters the mold by means of gravity pouring, and the gap of the filler is filled to obtain a molded object.

Further, the fillers form communicated hole structures or ant nest structures in the casting.

Further, the shape formed by the filler includes a circle, a square, and an irregular shape.

Further, the filler is filled in the forming die to account for 20% -60% of the volume of the inner cavity of the forming die.

Further, the filler is layered inside the molding die. So that the product has layering.

The beneficial effects obtained by the invention are as follows: by filling the soluble mixture in the casting molding material, after the casting molding material is cooled and molded, the filler formed by the mixture can be quickly dissolved in water to be cleaned, and the demolding is quick; the prepared casting molding product has light weight, light transmission performance and sound insulation performance; three-dimensional holes or ant nests or honeycomb channels are formed in the casting molding object, so that the casting molding object has a technological sense; can be used for decorating outer wall indoor screens, lamp decorations, ornaments, furniture accessories and the like, and the product has richness.

Detailed Description

The present invention will be further described with reference to the following embodiments.

Example 1

The invention discloses a mixture for forming holes in a casting molding, which consists of 80-96% of main filler, 3-5% of adhesive and 5-10% of breathable filler by weight ratio. The main filler is composed of at least one of red sand, clay, yellow sand, quartz sand and mesh soil; the adhesive is composed of at least one of glutinous rice flour, bentonite and resin; the breathable filler consists of wood chips or natural plant chips. Wherein, the main filler, the adhesive and the breathable filler are in powder form, and a small amount of water is added to enable the mixture to be pasty and to generate a certain shape. The mixture has the characteristics of high temperature resistance and water solubility, is used as a filler in a pouring process, resists high temperature in the pouring process, can keep a preset shape unchanged, is not adhered to the inner wall of a casting when demolding is carried out after pouring is finished, and can be quickly cleaned.

Example 2

In this example, the mixture filler with a certain shape can be prepared by adding water, wherein the weight ratio of the main filler is 92%, the adhesive is 3%, and the air-permeable filler is 5%.

Example 3

In this example, the mixture filler with a certain shape can be prepared by adding water, wherein the weight ratio of the main filler is 85%, the adhesive is 5%, and the air permeable filler is 10%.

Example 4

The invention relates to a process for forming holes by a casting molding, which comprises the following steps:

(1) drying and forming the prepared mixture in any embodiment to obtain a hard filler;

In the step (2), the solution enters the mold by means of gravity pouring, and the gap of the filler is filled to obtain a formed object.

Through the process described in this embodiment, the fillers form a connected pore structure or ant nest structure within the casting. The shape of the filler includes a circle, a square and an irregular shape. The filler is filled in the forming die and accounts for 20-60% of the volume of the inner cavity of the forming die. The filler is arranged inside the forming die in layers.

In the specific preparation process, the main filler, the adhesive and the breathable filler are combined according to the weight ratio disclosed in the embodiment 1, the embodiment 2 or the embodiment 3, water is added to prepare a mixture in a certain shape, the mixture is placed into a forming mold, the solution is poured into the forming mold, and the gravity pouring mode is adopted, so that the solution is fully attached to the surface of the filler prepared from the mixture. And cooling, solidifying and forming the solution in a natural cooling mode. And after the casting is formed, the filler filled in the casting is washed and soaked, so that the filler disappears from the casting, and a hole structure is left. The filling material is formed into a hole structure or an ant nest shape in the casting cooling forming process, so that the casting is light-permeable, the weight is reduced, and a certain sound insulation effect is achieved.

The mixture of the invention forms filler to be filled on the casting forming object, so that the mixture forms a hole structure or an ant nest structure inside the casting forming object, thereby reducing weight, being light-permeable and having diversity of products. The polymer is a high molecular compound and comprises a compound formed by curing resin, plastic, rubber and fiber through liquid.

In summary, the above-mentioned embodiments are only for convenience of illustrating the invention and are not to be construed as limiting the invention in any way, and persons skilled in the art can appreciate that the invention is not limited to the above-mentioned embodiments, but also equivalent embodiments, which are partially changed or modified within the technical scope of the invention without departing from the technical scope of the invention.

Claims

1. A mixture for making a cast molding into a hole, comprising: the mixture consists of 80 to 96 weight percent of main filler, 3 to 5 weight percent of adhesive and 5 to 10 weight percent of breathable filler.

2. The mixture for forming a cavity of a castable according to claim 1, wherein: the main filler is composed of at least one of red sand, clay, yellow sand, quartz sand and mesh soil; the adhesive is composed of at least one of glutinous rice flour, bentonite and resin; the breathable filler consists of wood chips or natural plant chips.

3. The mixture for forming cavities in a castable according to claim 2, wherein: the content of the main filler is 92%, the content of the adhesive is 3%, and the content of the breathable filler is 5%.

4. The mixture for forming a cavity of a castable according to claim 1, wherein: the content of the main filler is 85 percent, the content of the adhesive is 5 percent, and the content of the breathable filler is 10 percent.

5. A process for forming holes by pouring molding objects is characterized by comprising the following steps:

(1) drying and forming the prepared mixture according to any one of the claims 1 to 4 to obtain a hard filler;

6. The process of forming a hole of claim 5, wherein: in the step (2), the solution enters the mold by means of gravity pouring, and the gap of the filler is filled to obtain a formed object.

7. The process of forming a hole of claim 5, wherein: the filler forms a communicated hole structure or ant nest structure in the casting.

8. The process of forming a hole of claim 5, wherein: the shape of the filler includes a circle, a square and an irregular shape.

9. The process of forming a hole of claim 5, wherein: the filler is filled in the forming die and accounts for 20-60% of the volume of the inner cavity of the forming die.

10. The process of forming a hole of claim 9, wherein: the filler is arranged inside the forming die in layers.