Special die-casting release agent for aluminum alloy cylinder body of new energy automobile

Abstract

The invention discloses a special die-casting release agent for an aluminum alloy cylinder body of a new energy automobile. The special die-casting release agent comprises the following raw materials in parts by weight: 15-20 parts of organic silicone oil, 8-11 parts of oxidized polyethlene wax, 4-7 parts of a surfactant, 5-8 parts of a modified additive, 3-5 parts of a functional agent, 2-3 parts of triethanolamine and 10-15 parts of water. The release agent can efficiently solve the demolding problem of the aluminum alloy cylinder block and reduce the adhesion risk of a casting and a mold, a basic film forming system is synergistic, 15-20 parts of organic silicone oil and 8-11 parts of oxidized polyethlene wax serve as core film forming substances, a uniform and lubricating film can be formed on the surface of the mold, and the friction coefficient of the casting and the mold is greatly reduced.

Description

Technical Field

[0001] This invention relates to the field of mold release agent technology, specifically to a special die-casting mold release agent for aluminum alloy cylinder blocks of new energy vehicles. Background Technology

[0002] To achieve lightweighting, core components of new energy vehicles, such as motor cylinder blocks and battery casings, are mostly made of aluminum alloy through die casting. Among them, aluminum alloy cylinder blocks have complex structures, thin walls, and many irregularly shaped channels, which places extremely high demands on the die casting process and auxiliary materials. As a key auxiliary material in the die casting process, the performance of the release agent directly affects the product's demolding effect, surface quality, and production efficiency. Existing die casting release agents have poor demolding efficiency and poor high-temperature stability, thus limiting the product's usability. Based on this, the present invention further improves upon them. Summary of the Invention

[0003] In view of the deficiencies of the prior art, the purpose of this invention is to provide a die-casting release agent for aluminum alloy cylinder blocks of new energy vehicles, so as to solve the problems mentioned in the background art.

[0004] The present invention solves the technical problem by adopting the following technical solution: This invention provides a special die-casting release agent for aluminum alloy cylinder blocks of new energy vehicles. The special die-casting release agent comprises the following raw materials in parts by weight: 15-20 parts of silicone oil, 8-11 parts of oxidized polyethylene wax, 4-7 parts of surfactant, 5-8 parts of modified additive, 3-5 parts of functional agent, 2-3 parts of triethanolamine, and 10-15 parts of water.

[0005] Preferably, the surfactant is a compound of sodium dodecylbenzenesulfonate and alkylphenol polyoxyethylene ether in a weight ratio of 2:1.

[0006] Preferably, the modified additive is prepared by: S01: Preparation of the additive solution: S01a: Preheat silica at 55-65℃ for 1 hour to obtain preheated silica. Mix 5-8 parts of preheated silica, 3-5 parts of alumina and 2-3 parts of nano-calcium carbonate thoroughly to obtain silica agent. S01b: Add 2-5 parts of sheet graphene and 2-3 parts of silica agent to 3-5 parts of lanthanum chloride solution and stir evenly to obtain the additive solution; S02: Mix 2-4 parts of sodium silicate solution and 2-3 parts of β-cyclodextrin agent evenly to obtain the modifier; S03: Add the modifier to the additive solution at a weight ratio of 3:5 and stir to modify it. After stirring, filter and dry to obtain the modified additive.

[0007] Preferably, the lanthanum chloride solution has a mass fraction of 2-5%; and the sodium silicate solution has a mass fraction of 5-8%.

[0008] Preferably, the stirring speed for the stirring modification treatment is 350-400 r / min, and the stirring time is 1 h.

[0009] Preferably, the β-cyclodextrin agent is obtained by thoroughly mixing β-cyclodextrin, sodium citrate solution and silane coupling agent KH560 in a weight ratio of (4-5):7:(1-2).

[0010] Preferably, the sodium citrate solution has a mass fraction of 5-8%.

[0011] Preferably, the preparation method of the functional agent is as follows: S11: Add 3-5 parts of glass microspheres and 2-4 parts of zinc oxide to 5-8 parts of 8% (w / w) dopamine hydrochloride solution, then add 2-3 parts of titanium oxide and stir evenly to obtain glass microsphere solution; S12: Hexagonal boron nitride and yttrium oxide are blended and sintered at a weight ratio of 3:1. After sintering, a sintered body is obtained. The sintered body and glass microsphere liquid were stirred evenly at a weight ratio of 3:5, then filtered and dried to obtain the functional agent.

[0012] Preferably, the sintering temperature for the blending sintering treatment is 210-230℃, and the sintering time is 2 hours.

[0013] Preferably, the special die-casting release agent is prepared by weighing the raw materials according to the weight proportions, mixing the raw materials thoroughly, and obtaining the special die-casting release agent.

[0014] Compared with the prior art, the present invention has the following beneficial effects: This invention provides a release agent that effectively solves the demolding problem of aluminum alloy cylinders, reducing the risk of adhesion between castings and molds. The basic film-forming system works synergistically: silicone oil (15-20 parts) and oxidized polyethylene wax (8-11 parts) serve as the core film-forming substances, forming a uniform and lubricated film on the mold surface, significantly reducing the coefficient of friction between the casting and the mold. Optimized dispersion with surfactants: sodium dodecylbenzenesulfonate and alkylphenol polyoxyethylene ether (2:1 composite) allow for thorough emulsification of the oil phase, solid phase, and water, ensuring uniform film formation after spraying and preventing demolding sticking caused by localized film defects. It is particularly suitable for difficult-to-demold areas such as irregularly shaped channels in cylinder bodies. High-temperature strengthening effect of modified additives: The modified additives contain high-temperature resistant components such as silicon dioxide, aluminum oxide, and sheet graphene. After being modified with lanthanum chloride and sodium silicate, they are more tightly integrated with the film-forming system and can maintain structural stability at high temperatures, preventing the release film from carbonization and cracking due to high temperatures.

[0015] Synergistic effect of functional agents at high temperatures: The sintered body of hexagonal boron nitride and yttrium oxide in the functional agents (sintered at 210-230℃) has excellent high-temperature resistance. Combined with glass microspheres and titanium dioxide, it can further improve the high-temperature oxidation resistance and structural integrity of the release film, ensuring that the performance does not degrade during continuous die casting. After scientific proportioning and modification, the raw materials have good dispersion uniformity and no particle agglomeration after film formation, which can avoid defects such as pitting and scratches on the surface of the casting. Surface modification effect of functional agents: The combination of glass microspheres and dopamine hydrochloride can make the release film more delicate, reduce the release agent residue on the surface of the casting, and reduce the cost of subsequent cleaning, polishing and other processing steps. The titanium dioxide component can also help improve the surface smoothness. Detailed Implementation

[0016] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to specific examples. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0017] This embodiment provides a special die-casting release agent for aluminum alloy cylinder blocks of new energy vehicles. The special die-casting release agent comprises the following raw materials in parts by weight: 15-20 parts of silicone oil, 8-11 parts of oxidized polyethylene wax, 4-7 parts of surfactant, 5-8 parts of modified additive, 3-5 parts of functional agent, 2-3 parts of triethanolamine, and 10-15 parts of water.

[0018] The surfactant in this embodiment is a compound of sodium dodecylbenzenesulfonate and alkylphenol polyoxyethylene ether in a weight ratio of 2:1.

[0019] The preparation method of the modified additive in this embodiment is as follows: S01: Preparation of the additive solution: S01a: Preheat silica at 55-65℃ for 1 hour to obtain preheated silica. Mix 5-8 parts of preheated silica, 3-5 parts of alumina and 2-3 parts of nano-calcium carbonate thoroughly to obtain silica agent. S01b: Add 2-5 parts of sheet graphene and 2-3 parts of silica agent to 3-5 parts of lanthanum chloride solution and stir evenly to obtain the additive solution; S02: Mix 2-4 parts of sodium silicate solution and 2-3 parts of β-cyclodextrin agent evenly to obtain the modifier; S03: Add the modifier to the additive solution at a weight ratio of 3:5 and stir to modify it. After stirring, filter and dry to obtain the modified additive.

[0020] In this embodiment, the lanthanum chloride solution has a mass fraction of 2-5%; the sodium silicate solution has a mass fraction of 5-8%.

[0021] In this embodiment, the stirring speed for the stirring modification treatment is 350-400 r / min, and the stirring time is 1 h.

[0022] In this embodiment, the β-cyclodextrin agent is obtained by thoroughly mixing β-cyclodextrin, sodium citrate solution, and silane coupling agent KH560 in a weight ratio of (4-5):7:(1-2).

[0023] The sodium citrate solution in this embodiment has a mass fraction of 5-8%.

[0024] The preparation method of the functional agent in this embodiment is as follows: S11: Add 3-5 parts of glass microspheres and 2-4 parts of zinc oxide to 5-8 parts of 8% (w / w) dopamine hydrochloride solution, then add 2-3 parts of titanium oxide and stir evenly to obtain glass microsphere solution; S12: Hexagonal boron nitride and yttrium oxide are blended and sintered at a weight ratio of 3:1. After sintering, a sintered body is obtained. The sintered body and glass microsphere liquid were stirred evenly at a weight ratio of 3:5, then filtered and dried to obtain the functional agent.

[0025] In this embodiment, the sintering temperature for the blending sintering treatment is 210-230℃, and the sintering time is 2 hours.

[0026] The preparation method of the special die-casting release agent in this embodiment is as follows: weigh the raw materials according to the weight parts, mix the raw materials thoroughly, and obtain the special die-casting release agent.

[0027] Example 1. This embodiment provides a special die-casting release agent for aluminum alloy cylinder blocks of new energy vehicles. The special die-casting release agent comprises the following raw materials in parts by weight: 15 parts of silicone oil, 8 parts of oxidized polyethylene wax, 4 parts of surfactant, 5 parts of modified additive, 3 parts of functional agent, 2 parts of triethanolamine, and 10 parts of water.

[0028] The surfactant in this embodiment is a compound of sodium dodecylbenzenesulfonate and alkylphenol polyoxyethylene ether in a weight ratio of 2:1.

[0029] The preparation method of the modified additive in this embodiment is as follows: S01: Preparation of the additive solution: S01a: Preheat silicon dioxide at 55°C for 1 hour to obtain preheated silicon dioxide. Mix 5 parts of preheated silicon dioxide, 3 parts of aluminum oxide and 2 parts of nano-calcium carbonate thoroughly to obtain silicon dioxide agent. S01b: 2 parts of sheet graphene and 2 parts of silica agent are added to 3 parts of lanthanum chloride solution and stirred evenly to obtain the additive solution; S02: Mix 2 parts of sodium silicate solution and 2 parts of β-cyclodextrin agent evenly to obtain the modifier; S03: Add the modifier to the additive solution at a weight ratio of 3:5 and stir to modify it. After stirring, filter and dry to obtain the modified additive.

[0030] In this embodiment, the lanthanum chloride solution has a mass fraction of 2%; the sodium silicate solution has a mass fraction of 5%.

[0031] In this embodiment, the stirring speed for the stirring modification treatment is 350 r / min, and the stirring time is 1 h.

[0032] In this embodiment, the β-cyclodextrin agent is obtained by thoroughly mixing β-cyclodextrin, sodium citrate solution, and silane coupling agent KH560 in a weight ratio of 4:7:1.

[0033] The sodium citrate solution in this embodiment has a mass fraction of 5%.

[0034] The preparation method of the functional agent in this embodiment is as follows: S11: Add 3 parts glass microspheres and 2 parts zinc oxide to 5 parts of 8% (w / w) dopamine hydrochloride solution, then add 2 parts titanium oxide and stir evenly to obtain glass microsphere liquid. S12: Hexagonal boron nitride and yttrium oxide are blended and sintered at a weight ratio of 3:1. After sintering, a sintered body is obtained. The sintered body and glass microsphere liquid were stirred evenly at a weight ratio of 3:5, then filtered and dried to obtain the functional agent.

[0035] In this embodiment, the sintering temperature for the blending sintering process is 210°C, and the sintering time is 2 hours.

[0036] The preparation method of the special die-casting release agent in this embodiment is as follows: weigh the raw materials according to the weight parts, mix the raw materials thoroughly, and obtain the special die-casting release agent.

[0037] Example 2. This embodiment provides a special die-casting release agent for aluminum alloy cylinder blocks of new energy vehicles. The special die-casting release agent comprises the following raw materials in parts by weight: 20 parts of silicone oil, 11 parts of oxidized polyethylene wax, 7 parts of surfactant, 8 parts of modified additive, 5 parts of functional agent, 3 parts of triethanolamine, and 15 parts of water.

[0038] The surfactant in this embodiment is a compound of sodium dodecylbenzenesulfonate and alkylphenol polyoxyethylene ether in a weight ratio of 2:1.

[0039] The preparation method of the modified additive in this embodiment is as follows: S01: Preparation of the additive solution: S01a: Preheat silicon dioxide at 65°C for 1 hour to obtain preheated silicon dioxide. Mix 8 parts of preheated silicon dioxide, 5 parts of aluminum oxide and 3 parts of nano-calcium carbonate thoroughly to obtain silicon dioxide agent. S01b: 5 parts of sheet graphene and 3 parts of silica agent are added to 5 parts of lanthanum chloride solution and stirred evenly to obtain the additive solution; S02: Mix 4 parts of sodium silicate solution and 3 parts of β-cyclodextrin agent evenly to obtain the modifier; S03: Add the modifier to the additive solution at a weight ratio of 3:5 and stir to modify it. After stirring, filter and dry to obtain the modified additive.

[0040] In this embodiment, the lanthanum chloride solution has a mass fraction of 5%; the sodium silicate solution has a mass fraction of 8%.

[0041] In this embodiment, the stirring speed for the stirring modification treatment is 400 r / min, and the stirring time is 1 h.

[0042] In this embodiment, the β-cyclodextrin agent is obtained by thoroughly mixing β-cyclodextrin, sodium citrate solution, and silane coupling agent KH560 in a weight ratio of 5:7:2.

[0043] The sodium citrate solution in this embodiment has a mass fraction of 8%.

[0044] The preparation method of the functional agent in this embodiment is as follows: S11: Add 5 parts glass microspheres and 4 parts zinc oxide to 8 parts of 8% (w / w) dopamine hydrochloride solution, then add 3 parts titanium oxide and stir evenly to obtain glass microsphere solution. S12: Hexagonal boron nitride and yttrium oxide are blended and sintered at a weight ratio of 3:1. After sintering, a sintered body is obtained. The sintered body and glass microsphere liquid were stirred evenly at a weight ratio of 3:5, then filtered and dried to obtain the functional agent.

[0045] In this embodiment, the sintering temperature for the blending sintering process is 230°C, and the sintering time is 2 hours.

[0046] The preparation method of the special die-casting release agent in this embodiment is as follows: weigh the raw materials according to the weight parts, mix the raw materials thoroughly, and obtain the special die-casting release agent.

[0047] Example 3. This embodiment provides a special die-casting release agent for aluminum alloy cylinder blocks of new energy vehicles. The special die-casting release agent comprises the following raw materials in parts by weight: 17.5 parts of silicone oil, 9 parts of oxidized polyethylene wax, 5.5 parts of surfactant, 6.5 parts of modified additive, 4 parts of functional agent, 2.5 parts of triethanolamine, and 12.5 parts of water.

[0048] The surfactant in this embodiment is a compound of sodium dodecylbenzenesulfonate and alkylphenol polyoxyethylene ether in a weight ratio of 2:1.

[0049] The preparation method of the modified additive in this embodiment is as follows: S01: Preparation of the additive solution: S01a: Preheat silica at 60°C for 1 hour to obtain preheated silica. 6.5 parts of preheated silica, 4 parts of alumina and 2.5 parts of nano-calcium carbonate are thoroughly mixed to obtain silica agent. S01b: 3.5 parts of sheet graphene and 2.5 parts of silica agent are added to 4 parts of lanthanum chloride solution and stirred evenly to obtain the additive solution; S02: Mix 3 parts of sodium silicate solution and 2.5 parts of β-cyclodextrin agent evenly to obtain the modifier; S03: Add the modifier to the additive solution at a weight ratio of 3:5 and stir to modify it. After stirring, filter and dry to obtain the modified additive.

[0050] In this embodiment, the lanthanum chloride solution has a mass fraction of 3.5%; the sodium silicate solution has a mass fraction of 6.5%.

[0051] In this embodiment, the stirring speed for the stirring modification treatment is 370 r / min, and the stirring time is 1 h.

[0052] In this embodiment, the β-cyclodextrin agent is obtained by thoroughly mixing β-cyclodextrin, sodium citrate solution, and silane coupling agent KH560 at a weight ratio of 4.5:7:1.5.

[0053] The sodium citrate solution in this embodiment has a mass fraction of 6.5%.

[0054] The preparation method of the functional agent in this embodiment is as follows: S11: Add 4 parts of glass microspheres and 3 parts of zinc oxide to 6.5 parts of 8% (w / w) dopamine hydrochloride solution, then add 2.5 parts of titanium oxide and stir evenly to obtain glass microsphere solution; S12: Hexagonal boron nitride and yttrium oxide are blended and sintered at a weight ratio of 3:1. After sintering, a sintered body is obtained. The sintered body and glass microsphere liquid were stirred evenly at a weight ratio of 3:5, then filtered and dried to obtain the functional agent.

[0055] In this embodiment, the sintering temperature for the blending sintering process is 220°C, and the sintering time is 2 hours.

[0056] The preparation method of the special die-casting release agent in this embodiment is as follows: weigh the raw materials according to the weight parts, mix the raw materials thoroughly, and obtain the special die-casting release agent.

[0057] Comparative Example 1. Unlike Example 3, no modified additives were added.

[0058] Comparative Example 2. Unlike Example 3, no silica agent was added during the preparation of the modified additive.

[0059] Comparative Example 3. Unlike Example 3, no modifier was added during the preparation of the modified additive.

[0060] Comparative Example 4. Unlike Example 3, no β-cyclodextrin was added to the modifier.

[0061] Comparative Example 5. Unlike Example 3, no functional agents were added.

[0062] Comparative Example 6. Unlike Example 3, no sintered body was added to the functional agent.

[0063] The performance tests of Examples 1-3 and Comparative Examples 1-6 are shown in the following results:

[0064] Examples 1-3 and Comparative Examples 1-6 show that the product of the present invention can achieve coordinated improvement in demolding success rate, high temperature resistance stability, and surface roughness. In products where no modifying additives are added, no silica agent is added during the preparation of the modifying additives, no modifier is added during the preparation of the modifying additives, no β-cyclodextrin agent is added to the modifier, and no functional agent is added, the performance of the product tends to deteriorate. Only the product raw materials obtained using the method of the present invention show the most significant performance improvement.

[0065] It will be apparent to those skilled in the art that the present invention is not limited to the details of the exemplary embodiments described above, and that the invention can be implemented in other specific forms without departing from the spirit or essential characteristics of the invention. Therefore, the embodiments should be considered in all respects as exemplary and non-limiting, and the scope of the invention is defined by the appended claims rather than the foregoing description. Thus, it is intended that all variations falling within the meaning and scope of equivalents of the claims be included within the present invention.

[0066] Furthermore, it should be understood that although this specification describes embodiments, not every embodiment contains only one independent technical solution. This narrative style is merely for clarity. Those skilled in the art should consider the specification as a whole, and the technical solutions in each embodiment can also be appropriately combined to form other embodiments that can be understood by those skilled in the art.

Claims

1. A die-casting release agent specifically for aluminum alloy cylinder blocks in new energy vehicles, characterized in that, The special die-casting release agent comprises the following raw materials in parts by weight: 15-20 parts of silicone oil, 8-11 parts of oxidized polyethylene wax, 4-7 parts of surfactant, 5-8 parts of modified additive, 3-5 parts of functional agent, 2-3 parts of triethanolamine, and 10-15 parts of water.

2. The die-casting release agent for aluminum alloy cylinder blocks of new energy vehicles according to claim 1, characterized in that, The surfactant is a compound of sodium dodecylbenzenesulfonate and alkylphenol polyoxyethylene ether in a weight ratio of 2:

1.

3. The die-casting release agent for aluminum alloy cylinder blocks of new energy vehicles according to claim 1, characterized in that, The preparation method of the modified additive is as follows: S01: Preparation of the additive solution: S01a: Preheat silica at 55-65℃ for 1 hour to obtain preheated silica. Mix 5-8 parts of preheated silica, 3-5 parts of alumina and 2-3 parts of nano-calcium carbonate thoroughly to obtain silica agent. S01b: Add 2-5 parts of sheet graphene and 2-3 parts of silica agent to 3-5 parts of lanthanum chloride solution and stir evenly to obtain the additive solution; S02: Mix 2-4 parts of sodium silicate solution and 2-3 parts of β-cyclodextrin agent evenly to obtain the modifier; S03: Add the modifier to the additive solution at a weight ratio of 3:5 and stir to modify it. After stirring, filter and dry to obtain the modified additive.

4. The die-casting release agent for aluminum alloy cylinder blocks of new energy vehicles according to claim 3, characterized in that, The lanthanum chloride solution has a mass fraction of 2-5%; the sodium silicate solution has a mass fraction of 5-8%.

5. The die-casting release agent for aluminum alloy cylinder blocks of new energy vehicles according to claim 3, characterized in that, The stirring speed for the stirring modification treatment was 350-400 r / min, and the stirring time was 1 h.

6. The die-casting release agent for aluminum alloy cylinder blocks of new energy vehicles according to claim 3, characterized in that, The β-cyclodextrin agent is obtained by thoroughly mixing β-cyclodextrin, sodium citrate solution and silane coupling agent KH560 in a weight ratio of (4-5):7:(1-2).

7. The die-casting release agent for aluminum alloy cylinder blocks of new energy vehicles according to claim 6, characterized in that, The sodium citrate solution has a mass fraction of 5-8%.

8. The die-casting release agent for aluminum alloy cylinder blocks of new energy vehicles according to claim 1, characterized in that, The preparation method of the functional agent is as follows: S11: Add 3-5 parts of glass microspheres and 2-4 parts of zinc oxide to 5-8 parts of 8% (w / w) dopamine hydrochloride solution, then add 2-3 parts of titanium oxide and stir evenly to obtain glass microsphere solution; S12: Hexagonal boron nitride and yttrium oxide are blended and sintered at a weight ratio of 3:

1. After sintering, a sintered body is obtained. The sintered body and glass microsphere liquid were stirred evenly at a weight ratio of 3:5, then filtered and dried to obtain the functional agent.

9. The die-casting release agent for aluminum alloy cylinder blocks of new energy vehicles according to claim 8, characterized in that, The sintering temperature for the blending sintering treatment is 210-230℃, and the sintering time is 2 hours.

10. The die-casting release agent for aluminum alloy cylinder blocks of new energy vehicles according to claim 1, characterized in that, The preparation method of the special die-casting release agent is as follows: weigh the raw materials according to the weight parts, mix the raw materials thoroughly, and obtain the special die-casting release agent.

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