Ceramic-based automobile wheel balance block and preparation method thereof

Abstract

The invention provides a ceramic-based automobile wheel balance block and a preparation method thereof. The ceramic-based automobile wheel balance block is prepared from the following raw materials: a ceramic material, a binder and water, the ceramic material is prepared from the following raw materials in percentage by mass: 5 to 45 percent of Al2O3, 3 to 30 percent of SiO2, 1 to 10 percent of TiO2, 0.1 to 10 percent of CaO and the balance of iron oxide. The mass of the binder is 5-25% of the mass of the ceramic material, and the mass of the water is 3-5% of the total mass of the ceramic material and the binder. The automobile wheel balance block is obtained by adopting a ceramic-based material through a compression molding process, the application performance of a product block body is remarkably improved, and a product formed through a customization process is high in size precision, extremely high in corrosion resistance, high in hardness and good in strength. According to the automobile wheel balance block raw material, the bonding performance of a balance block and a hub is remarkably improved, and meanwhile dynamic balance operation is more convenient and faster.

Description

TECHNICAL FIELD

[0001] The application belongs to the technical field of automobile accessories, and relates to a ceramic-based automobile wheel balance block and a preparation method thereof. BACKGROUND

[0002] An automobile wheel is composed of a tire and a hub as a whole. However, due to manufacturing reasons, the mass distribution of each part of the whole cannot be completely uniform. When the automobile wheel rotates at a high speed, a dynamic unbalance state is formed, causing the phenomenon that the wheel shakes and the steering wheel vibrates during driving. In order to avoid and completely eliminate this phenomenon, the wheel needs to be corrected in balance by adding a counterweight under dynamic conditions. This correction process is commonly known as dynamic balancing, that is, a balance block needs to be installed.

[0003] The main function of the balance block is to realize the stability of dynamic balance of the tire under high-speed rotation by being installed at the position where the mass of the wheel assembly is small. The current automobile wheel balance block products are all produced by using metal raw materials, and the metal raw materials are generally selected from steel, copper, lead and zinc. The lead block has poor environmental protection and is easy to rust after long-term placement. The zinc block has a high cost. In the later period, the balance block is mostly made of steel with a low cost. However, the steel balance block product is also easy to corrode, has poor precision and is difficult to manufacture. At the same time, the steel product is not easy to be pasted on the hub, and the operation is inconvenient.

[0004] There are also patent reports about other composed balance blocks. For example, the Chinese patent document CN110682727A provides an automobile adhesive balance block and a preparation process thereof. The automobile adhesive balance block comprises a balance block body, a viscose part and release paper connected in sequence. The balance block body is composed of metal powder or stainless steel powder and composite resin and additives. The stainless steel powder is treated by a silicate aqueous solution. The stainless steel powder comprises the following components in percentage by mass: carbon ≤0.12%, silicon ≤1%, manganese ≤2%, phosphorus ≤0.045%, sulfur ≤0.03%, chromium 16-20.25%, nickel 8-10.5%, and the balance is iron and inevitable impurities. The metal powder is made of iron powder mixed with nickel or chromium. The mass ratio of iron powder to nickel is 10:1-2, and the mass ratio of iron powder to chromium is 10:0.5-1.5. However, the preparation process of the iron powder, nickel powder and chromium powder is complicated, and the specific gravity of iron and chromium is close, which increases many process constraints for mass production in large-scale industry.

[0005] The Chinese patent document CN112371980A provides a sintering-free balance block production process, which is made of the following raw materials: manganese 17-30%, thallium 0.05-0.20%, chromium 0.5-1.2%, silicon 0.5-0.75%, nickel 0.5-0.8%, sulfur ≤0.08%, niobium 0.02-0.10%, carbon 0.5-1.2%, additive 0.1-0.5%, lubricant 0.3-0.8%, binder 2-4%, and the balance is iron. However, it uses iron-based as the main raw material of the product, the preparation of iron powder consumes a lot of energy, and it is difficult to achieve high precision in the subsequent processing process, and the cost of the forming process increases greatly.

[0006] Therefore, it is necessary to develop an automobile wheel balance block with excellent use performance and material performance. SUMMARY

[0007] In view of the deficiencies of the prior art, especially in view of the fact that the current automobile wheel balance block products are produced from metal raw materials, the metal raw materials are generally selected from steel, copper, lead, zinc and the like, among which steel products dominate the market. However, steel balance block products are prone to corrosion, have poor precision, have a long manufacturing process, and unstable process control. In addition, during the manufacturing process, surface zinc plating, powder spraying and other processes generate a large amount of waste and environmental impact that needs to be disposed of. At the same time, steel products are not easy to stick to the hub due to the influence of external environment, and are inconvenient to operate. The present application provides a ceramic-based automobile wheel balance block and a preparation method thereof.

[0008] The technical scheme of the present application is as follows:

[0009] A ceramic-based automobile wheel balance block is prepared from the following raw materials: ceramic material, binder and water.

[0010] The ceramic material comprises the following raw materials in mass percentage: Al2O3 5-45%, SiO2 3-30%, TiO2 1-10%, CaO 0.1-10%, and the balance is iron oxide.

[0011] The mass of the binder is 5-25% of the mass of the ceramic material, and the mass of the water is 3-5% of the total mass of the ceramic material and the binder.

[0012] According to the present application, the ceramic material comprises the following raw materials in mass percentage: Al2O3 25-40%, SiO2 20-26%, TiO2 4-9.5%, CaO 1.5-5%, and the balance is iron oxide.

[0013] According to the present application, the iron oxide is iron oxide, ferrous oxide or magnetite.

[0014] According to the application, preferably, the binder is a mixture of water-soluble phenolic resin and cellulose, and the mass ratio of the water-soluble phenolic resin to the cellulose in the mixture is 3-5:1.

[0015] According to the application, the preparation method of the ceramic-based automobile wheel balancing block comprises the following steps:

[0016] (1) mixing ceramic material, binder and water, stirring uniformly, and then leavening to obtain a blank;

[0017] (2) adding the blank obtained in step (1) into a rectangular mold, and pressing in a forming machine to obtain an initial product;

[0018] (3) drying, slow cooling and straightening the initial product obtained in step (2) to obtain the ceramic-based automobile wheel balancing block.

[0019] According to the application, preferably, the leavening in step (1) is standing at room temperature for more than 2 hours, and further preferably for 5-20 hours.

[0020] According to the application, preferably, the cross-sectional shape of the initial product pressed in step (2) is oval, rectangular or trapezoidal; and the pressing condition is that the pressure is greater than or equal to 300 KN, and the pressing time is less than or equal to 15 s, and further preferably, the pressure is 400-500 KN, and the pressing time is 5-10 s.

[0021] According to the application, preferably, the drying temperature in step (3) is 50-150 ℃, and further preferably 70-90 ℃, and the drying time is 15-30 min.

[0022] According to the application, preferably, the slow cooling time in step (3) is 3-5 min, and the slow cooling is to room temperature.

[0023] The cross-sectional shape of the ceramic-based automobile wheel balancing block of the application is oval, rectangular or trapezoidal.

[0024] The technical features and beneficial effects of the application are as follows:

[0025] 1. The automobile wheel balancing block of the application is obtained by using ceramic-based material through a pressing forming process, and the preparation process is simple, which greatly improves the application performance of the product block, and the product size after the custom process forming is high in precision, extremely high in corrosion resistance, and high in hardness and strength.

[0026] 2, the raw material of the automobile wheel balance block has excellent performance, improves the core performance of the product, and mainly shows that the corrosion resistance, the surface adhesion performance firmness and the operation convenience of the product are greatly improved. While improving the performance, compared with the traditional manufacturing process, the manufacturing process of a large amount of environmental waste produced by surface treatment and other production links is omitted. The special performance of the raw material of the automobile wheel balance block greatly improves the adhesion performance of the adhesion on the hub, and is easy to operate and install. BRIEF DESCRIPTION OF DRAWINGS

[0027] Figure 1 The structure and size of the trapezoidal ceramic-based automobile wheel balance block obtained in Example 1 are shown in the schematic diagram, and the size unit is mm.

[0028] Figure 2 The structure and size of the rectangular ceramic-based automobile wheel balance block obtained in Example 2 are shown in the schematic diagram, and the size unit is mm.

[0029] Figure 3 The mechanical property test result diagram of the ceramic-based automobile wheel balance block prepared in Example 1.

[0030] Figure 4 The mechanical property test result diagram of the ceramic-based automobile wheel balance block prepared in Example 2. DETAILED DESCRIPTION

[0031] The present application will be further described below in conjunction with specific examples, but is not limited thereto. The present application is not described in detail, which is the existing technology in the art.

[0032] The water-soluble phenolic resin used in the example is phenolic resin 2123.

[0033] Example 1

[0034] A ceramic-based automobile wheel balance block is prepared from the following raw materials: ceramic material, binder and water.

[0035] The ceramic material comprises the following raw materials in mass percentage: Al2O3 37.6%, SiO2 25.1%, TiO2 4.5%, CaO 4.7%, and the balance is iron oxide.

[0036] The binder is a mixture of water-soluble phenolic resin and cellulose, and the mass ratio of water-soluble phenolic resin to cellulose in the mixture is 4:1, and the mass of the binder is 11% of the mass of the ceramic material; the mass of the water is 4% of the total mass of the ceramic material and the binder.

[0037] The preparation method of the above-mentioned ceramic-based automobile wheel balance block comprises the following steps:

[0038] (1) Put the ceramic material, the binder and the water into the mixer to mix evenly, and after fully stirring for 25 minutes, the mixed raw materials are left to stand at room temperature for 6 hours.

[0039] (2) After the raw materials are left to stand, pour the raw materials into the rectangular mold to compact and form a long strip-shaped rectangular blank, which is placed in front of the ladder forming machine for standby. The rectangular blank is once put into each forming hole of the ladder forming machine, and the rectangular blank is pressed into a trapezoidal initial product. The pressing pressure is 400KN, and the pressing time is 10s. The obtained initial product is put into the drying machine for drying, the drying temperature is set at 80℃, and the drying time is 15 minutes. After drying, the initial product is placed in the slow cooling machine for slow cooling, the slow cooling time is set at 3 minutes, and then it is put into the straightening machine for size straightening and shaping to form the final qualified trapezoidal product.

[0040] The structure and size of the trapezoidal ceramic-based automobile wheel balance block obtained in the embodiment are shown in the schematic view as shown in Figure 1 .

[0041] Example 2

[0042] A ceramic-based automobile wheel balance block is prepared from the following raw materials: ceramic material, binder and water.

[0043] The ceramic material includes the following raw materials in mass percentage: Al2O3 27.2%, SiO2 20.5%, TiO2 9.5%, CaO 1.7%, and the balance is ferrous oxide.

[0044] The binder is a mixture of water-soluble phenolic resin and cellulose, and the mass ratio of water-soluble phenolic resin to cellulose in the mixture is 4:1. The mass of the binder is 15% of the mass of the ceramic material. The mass of the water is 4.8% of the total mass of the ceramic material and the binder.

[0045] The preparation method of the above-mentioned ceramic-based automobile wheel balance block includes the following steps:

[0046] (1) Put the ceramic material, the binder and the water into the mixer to mix evenly, and after fully stirring for 20 minutes, the mixed raw materials are left to stand at room temperature for 16 hours.

[0047] (2) After the raw materials are leavened, the raw materials are poured into a rectangular mold to be compacted to form a long strip-shaped rectangular blank, which is placed in front of a rectangular molding machine for standby, the rectangular blank is once put into each molding hole of the molding machine, the rectangular blank is pressed into a rectangular initial product, the pressing pressure is 400KN, and the pressing time is 10s; the initial product is dried in a drying machine, the drying temperature is set to 95 DEG C, and the drying time is 10 minutes. After drying, the initial product is placed in a slow cooling machine for slow cooling, the slow cooling time is set to 3 minutes, then it is put into a straightening machine for size straightening and shaping to form the final qualified rectangular product.

[0048] The structure and size of the rectangular ceramic automobile wheel balance block obtained in the embodiment are shown in the schematic view of Figure 2 .

[0049] Test Example 1

[0050] The mechanical properties of the balance blocks prepared in Examples 1-2 were tested, 30 balance block products were randomly selected for mechanical property test, the test machine was an MTS electronic universal testing machine, and the experimental results are shown in Figure 3 and Figure 4 .

[0051] As can be seen from Figure 3 and Figure 4 , the balance block obtained by the present application has high strength, which meets the strength requirement of automobile wheel balance block.

Claims

1. A ceramic-based automotive wheel balance weight, characterized in that, It is prepared from the following raw materials: ceramic materials, binder and water; The ceramic material comprises the following raw materials in the following mass percentages: Al2O3 5-45%, SiO2 3-30%, TiO2 1-10%, CaO 0.1-10%, with the balance being iron oxides; The mass of the binder is 5-25% of the mass of the ceramic material, and the mass of the water is 3-5% of the total mass of the ceramic material and the binder.

2. The ceramic-based automotive wheel balance weight according to claim 1, characterized in that, The ceramic material comprises the following raw materials in the following mass percentages: Al2O3 25-40%, SiO2 20-26%, TiO2 4-9.5%, CaO 1.5-5%, and the balance being iron oxides.

3. The ceramic-based automotive wheel balance weight according to claim 1, characterized in that, The iron oxide is iron oxide, ferrous oxide, or iron(II,III) oxide.

4. The ceramic-based automotive wheel balance weight according to claim 1, characterized in that, The binder is a mixture of water-soluble phenolic resin and cellulose, wherein the mass ratio of water-soluble phenolic resin to cellulose in the mixture is 3 to 5:

1.

5. The method for preparing the ceramic-based automobile wheel balance block according to any one of claims 1-4, characterized in that, The steps include the following: (1) Mix ceramic materials, binder and water, stir evenly, and let it ferment to obtain blank; (2) Add the blank obtained in step (1) into a rectangular mold and press it in a molding machine to obtain the initial product; (3) The initial product obtained in step (2) is dried, slowly cooled and straightened to obtain a ceramic-based automobile wheel balance block.

6. The method for preparing the ceramic-based automobile wheel balance block according to claim 5, characterized in that, The proofing process described in step (1) involves letting the food stand at room temperature for more than 2 hours, preferably 5-20 hours.

7. The method for preparing the ceramic-based automobile wheel balance block according to claim 5, characterized in that, The initial product pressed by the molding machine in step (2) has an elliptical, rectangular or trapezoidal cross-sectional shape; the pressing conditions are: pressure ≥300KN, pressing time ≤15s, preferably, the pressing pressure is 400~500KN and the pressing time is 5~10s.

8. The method for preparing the ceramic-based automobile wheel balance block according to claim 5, characterized in that, The drying temperature in step (3) is 50-150°C, more preferably 70-90°C, and the drying time is 15-30 min.

9. The method for preparing the ceramic-based automobile wheel balance block according to claim 5, characterized in that, The slow cooling time mentioned in step (3) is 3 to 5 minutes, slow cooling to room temperature.

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