High-temperature-resistant casting

Abstract

The utility model discloses a high temperature resistant casting which comprises a casting body, the casting body comprises a polypropylene coating layer, the outer surface of the polypropylene coating layer is coated with a graphene coating layer, the outer surface of the graphene coating layer is coated with an alkyd coating layer, the outer surface of the alkyd coating layer is coated with a boron nitride coating layer, and the outer surface of the boron nitride coating layer is coated with a boron nitride coating layer. And a heat-conducting fin is arranged on the inner wall of the casting body. Through the arrangement of the cooling fins, the heat conducting fins, the polypropylene coating layer, the graphene coating layer, the alkyd coating layer and the boron nitride coating layer, the problems that an existing casting is poor in high-temperature-resistant effect, the temperature of a casting material is too high, oxides and sulfides are likely to be easily formed at high temperature, the quality of the casting becomes poor, defects are formed, meanwhile, the temperature is too high, and the service life of the casting is prolonged are solved. Casting materials and mold materials can cause thermal wave stretching due to thermal expansion and cold contraction and the like, so that sintering and hot crack defects are caused, and the casting quality and the use effect are seriously influenced.

Description

Technical Field

[0001] The utility model relates to the technical field of castings, in particular to a high-temperature resistant casting. Background Art

[0002] Castings are metal shaped objects obtained by various casting methods, that is, smelted liquid metal is poured into a pre-prepared mold by pouring, injection, suction or other casting methods, and then cooled and polished to obtain objects with certain shapes, sizes and properties. Castings have a long history of application. In ancient times, people used castings to make some daily necessities. In modern times, castings are mainly used as blanks for machine parts. Some precision castings can also be directly used as machine parts. Castings account for a large proportion of mechanical products. For example, in tractors, the weight of castings accounts for about 50-70% of the total weight of the machine, in agricultural machinery it accounts for 40-70%, in machine tools, internal combustion engines, etc. It accounts for 70-90%. Among all kinds of castings, mechanical castings have the most varieties, the most complex shapes and the largest consumption, accounting for about 60% of the total casting output, followed by ingot molds for metallurgy and pipes for engineering, as well as some tools in life. However, the existing castings have poor high temperature resistance. If the casting material temperature is too high, it may easily form oxides and sulfides at high temperature, which will deteriorate its quality and thus form defects. At the same time, if the temperature is too high, the casting material and mold material will cause thermal wave stretching due to thermal expansion and contraction, resulting in sintering and thermal cracking defects, which seriously affect the quality and use effect of the casting, increase the cost of users, and cannot meet people's use needs. Utility Model Content

[0003] The utility model aims to provide a high-temperature resistant casting, which has the advantage of high-temperature resistance and solves the problem that the existing castings have poor high-temperature resistance. The temperature of the casting material is too high, which may lead to the easy formation of oxides and sulfides at high temperature, making their quality deteriorate, thereby forming defects. At the same time, if the temperature is too high, the casting material and the mold material will cause thermal wave stretching due to thermal expansion and contraction, thereby causing sintering and thermal cracking defects, which seriously affects the quality and use effect of the casting, increases the cost of users, and cannot meet people's use needs.

[0004] To achieve the above-mentioned purpose, the utility model provides the following technical solution: a high-temperature resistant casting, comprising a casting body, the casting body comprising a polypropylene coating layer, the outer surface of the polypropylene coating layer is coated with a graphene coating layer, the outer surface of the graphene coating layer is coated with an alkyd coating layer, the outer surface of the alkyd coating layer is coated with a boron nitride coating layer, the inner wall of the casting body is provided with a heat conducting plate, and a heat sink is fixedly connected to one side of the heat conducting plate.

[0005] Preferably, the alkyd paint layer includes an epoxy zinc-rich primer layer, and the outer surface of the epoxy zinc-rich primer layer is coated with an epoxy iron red primer layer.

[0006] Preferably, the outer surface of the epoxy iron red primer layer is coated with red lead anti-rust paint, and the outer surface of the red lead anti-rust paint is coated with a polyethylene resin layer.

[0007] Preferably, the boron nitride coating layer includes a melamine coating layer, and the inner surface of the melamine coating layer is coated with a polyvinyl fluoride coating layer.

[0008] Preferably, the inner surface of the polyfluoroethylene coating layer is coated with a polytetrafluoroethylene coating layer, and the thickness of the polytetrafluoroethylene coating layer is 0.03 mm.

[0009] Preferably, the polypropylene coating layer and the graphene coating layer are connected via a phenolic resin coating layer, and the thickness of the polypropylene coating layer is 0.02 mm.

[0010] Compared with the prior art, the beneficial effects of the utility model are as follows:

[0011] 1. The utility model solves the problem that the existing castings have poor high temperature resistance by setting up heat sinks, heat conductive sheets, polypropylene coating layers, graphene coating layers, alkyd coating layers and boron nitride coating layers. If the temperature of the casting material is too high, oxides and sulfides may be easily formed at high temperatures, causing their quality to deteriorate, thereby forming defects. At the same time, if the temperature is too high, the casting material and mold material may cause thermal wave stretching due to thermal expansion and contraction, thereby causing sintering and thermal cracking defects, which seriously affects the quality and use effect of the casting, increases the cost of users, and cannot meet people's use needs.

[0012] 2. The utility model has the advantages of good mechanical properties, high hardness, good plasticity, water resistance, rust resistance and corrosion resistance through the setting of the epoxy zinc-rich primer layer. It has excellent rust resistance, water resistance and chemical corrosion resistance through the setting of the epoxy iron red primer layer, and has good adhesion after coating. BRIEF DESCRIPTION OF THE DRAWINGS

[0013] Figure 1 It is a schematic diagram of the structure of the utility model;

[0014] Figure 2 This is a cross-sectional view of the casting body structure of the utility model;

[0015] Figure 3 This is a cross-sectional view of the structure of the alkyd coating layer of the utility model;

[0016] Figure 4 This is a cross-sectional view of the structure of the boron nitride coating layer of the utility model.

[0017] In the figure: 1. casting body; 101. polypropylene coating layer; 102. graphene coating layer; 103. alkyd coating layer; 1031. epoxy zinc-rich primer layer; 1032. epoxy iron red primer layer; 1033. red lead anti-rust paint; 1034. polyethylene resin layer; 104. boron nitride coating layer; 1041. melamine coating layer; 1042. polyvinyl fluoride coating layer; 1043. polytetrafluoroethylene coating layer; 2. heat sink; 3. thermal conductive sheet. DETAILED DESCRIPTION

[0018] The following will be combined with the drawings in the embodiments of the utility model to clearly and completely describe the technical solutions in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments in the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.

[0019] See also Figure 1-4 A high temperature resistant casting comprises a casting body 1, the casting body 1 comprises a polypropylene coating layer 101, the outer surface of the polypropylene coating layer 101 is coated with a graphene coating layer 102, the outer surface of the graphene coating layer 102 is coated with an alkyd coating layer 103, the outer surface of the alkyd coating layer 103 is coated with a boron nitride coating layer 104, the inner wall of the casting body 1 is provided with a heat conducting sheet 3, one side of the heat conducting sheet 3 is fixedly connected with a heat sink 2, the heat generated by the casting body 1 can be introduced into the heat sink 2 through the heat conducting sheet 3, and then the heat is dissipated through the heat sink 2, and then the polypropylene coating layer 101 is provided , with the effects of high strength, good elasticity, wear resistance, corrosion resistance, electrical insulation, warmth retention and high temperature resistance. Through the setting of the graphene coating layer 102, it has the advantages of anti-corrosion, flame retardancy, thermal conductivity, anti-fouling, heat resistance, electromagnetic shielding performance and anti-static performance. Through the setting of the alkyd coating layer 103, it has the advantages of bright paint film, long-lasting, flexible paint film, good adhesion, strong durability, not easy to age and high temperature resistance. Through the setting of the boron nitride coating layer 104, it has the advantages of very low friction coefficient, very good high temperature stability, very good thermal shock resistance, very high strength, very high thermal conductivity, low expansion coefficient, anti-static and corrosion resistance.

[0020] The alkyd paint layer 103 includes an epoxy zinc-rich primer layer 1031, and the outer surface of the epoxy zinc-rich primer layer 1031 is coated with an epoxy iron red primer layer 1032. Through the setting of the epoxy zinc-rich primer layer 1031, it has the advantages of good mechanical properties, high hardness, good plasticity, water resistance, rust resistance and corrosion resistance. Through the setting of the epoxy iron red primer layer 1032, it has excellent rust resistance, water resistance and chemical corrosion resistance, and good adhesion after coating.

[0021] The outer surface of the epoxy iron red primer layer 1032 is coated with a red lead anti-rust paint 1033 , and the outer surface of the red lead anti-rust paint 1033 is coated with a polyethylene resin layer 1034 .

[0022] The boron nitride coating layer 104 includes a melamine coating layer 1041 , and the inner surface of the melamine coating layer 1041 is coated with a polyvinyl fluoride coating layer 1042 .

[0023] The inner surface of the polyfluoroethylene coating layer 1042 is coated with a polytetrafluoroethylene coating layer 1043 , and the thickness of the polytetrafluoroethylene coating layer 1043 is 0.03 mm.

[0024] The polypropylene coating layer 101 and the graphene coating layer 102 are connected via a phenolic resin coating layer, and the thickness of the polypropylene coating layer 101 is 0.02 mm.

[0025] When in use, the heat generated by the casting body 1 can be introduced into the heat sink 2 through the heat conductive sheet 3, and then the heat is dissipated through the heat sink 2. Then, through the setting of the polypropylene coating layer 101, it has the effects of high strength, good elasticity, wear resistance, corrosion resistance, electrical insulation, warmth retention and high temperature resistance. Through the setting of the graphene coating layer 102, it has the advantages of anti-corrosion, flame retardancy, thermal conductivity, anti-fouling, heat resistance, electromagnetic shielding performance and anti-static performance. Through the setting of the alkyd coating layer 103, it has the advantages of bright paint film, long-lasting, flexible paint film, good adhesion, strong durability, not easy to age and high temperature resistance. Through the setting of the boron nitride coating layer 104, it has the advantages of very low friction coefficient, very good high temperature stability, very good thermal shock resistance, very high strength, very high thermal conductivity, low expansion coefficient, anti-static and corrosion resistance.

[0026] Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that various changes, modifications, substitutions and variations may be made to the embodiments without departing from the principles and spirit of the present invention, and that the scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. A high temperature resistant casting, comprising a casting body (1), characterized in that: The casting body (1) comprises a polypropylene coating layer (101), the outer surface of the polypropylene coating layer (101) is coated with a graphene coating layer (102), the outer surface of the graphene coating layer (102) is coated with an alkyd coating layer (103), and the outer surface of the alkyd coating layer (103) is coated with a boron nitride coating layer (104), and a heat conducting sheet (3) is provided on the inner wall of the casting body (1), and a heat sink (2) is fixedly connected to one side of the heat conducting sheet (3).

2. A high temperature resistant casting according to claim 1, characterized in that: The alkyd paint layer (103) comprises an epoxy zinc-rich primer layer (1031), and the outer surface of the epoxy zinc-rich primer layer (1031) is coated with an epoxy iron red primer layer (1032).

3. A high temperature resistant casting according to claim 2, characterized in that: The outer surface of the epoxy iron red primer layer (1032) is coated with a red lead anti-rust paint (1033), and the outer surface of the red lead anti-rust paint (1033) is coated with a polyethylene resin layer (1034).

4. A high temperature resistant casting according to claim 1, characterized in that: The boron nitride coating layer (104) comprises a melamine coating layer (1041), and the inner surface of the melamine coating layer (1041) is coated with a polyvinyl fluoride coating layer (1042).

5. A high temperature resistant casting according to claim 4, characterized in that: The inner surface of the polyfluoroethylene coating layer (1042) is coated with a polytetrafluoroethylene coating layer (1043), and the thickness of the polytetrafluoroethylene coating layer (1043) is 0.03 millimeters.

6. A high temperature resistant casting according to claim 1, characterized in that: The polypropylene coating layer (101) and the graphene coating layer (102) are connected via a phenolic resin coating layer, and the thickness of the polypropylene coating layer (101) is 0.02 millimeters.

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