CN1056120C - Manufacturing method of automobile steering wheel - Google Patents

Abstract

A method for manufacturing the steering wheel of car, raw materials such as good forest, urea, melamine, ammonia water, etc. of appropriate proportion, regulate and make into glue under the appropriate temperature; crushing waste wood, grinding into fine fiber, removing dust, adding a glue agent, and mixing to obtain a bakelite raw material; placing the bakelite raw material into a steering wheel powder groove of about 1/2 degrees, then placing into a steering wheel framework, then placing another 1/2 bakelite raw material, slightly pressurizing, then placing the powder groove in a mold upside down, taking out the powder groove, and heating and pressurizing the steering wheel raw material through the mold to form a prototype product; and demolding after heating and pressurizing to obtain the automobile steering wheel with log surface coated with inner layer bakelite material and metal skeleton.

Description

Manufacturing method of automobile steering wheel

The present invention relates to a method for manufacturing a wooden automobile steering wheel for vehicle control connectors in the field of transportation, in particular to an automobile steering wheel that can be made into a log surface coated with an inner bakelite raw material and a skeleton, which has excellent robustness and appearance A method for manufacturing an automobile steering wheel that is aesthetically pleasing and has industrial utility value.

Wooden car steering wheels have the characteristics of delicate texture and comfortable grip, and are generally favored by drivers because of their advantages such as not easy to be affected by moisture, relatively strong, and high safety in use; however, the previously known wooden car steering wheels, whether they are In the manufacture of the steering wheel, the acquisition of wood, or in the actual use, there are visible defects and inconveniences, and it is always difficult to perfect.

Take the steering wheel of a log car as an example. To use a log to form a steering wheel, you must obtain the log at an expensive price, and then manually cut out the desired shape, including the details of the curved and curved surfaces on the surface of the steering wheel for fingers to hold. processing, etc., thus making the price of the finished product high and not acceptable to the general public.

One of the ways to reduce the manufacturing cost of the log automobile steering wheel is to use bent wood to wind and glue the steering wheel; the manufacturing method of this kind of steering wheel is to use bent wood as raw material, and roll it into two corresponding upper and lower parts respectively. The upper and lower halves are bonded together with an adhesive to form a steering wheel after the Y-shaped frame is clamped in the middle; although this kind of steering wheel has the advantage of being cheap, on the whole, the concave and convex on the surface of the steering wheel In terms of detail processing, it is still extremely inconvenient due to the limitation of bentwood raw materials, making it difficult to achieve a soft, round and streamlined aesthetic in appearance, and it is easy to cause turtles when used in areas with different dryness, humidity and temperature changes. In addition, because the steering wheel is bonded by the upper and lower corresponding two halves, the bonding surface is easy to form a gap on the surface of the steering wheel, especially after a long period of use, the chemical change of the adhesive, or any The poor quality between the central Y-shaped frame and the bent wood will cause changes such as loosening of the steering wheel mechanism and reduction in strength, which will cause safety concerns.

In view of the defects of the above-mentioned existing traditional log steering wheel, based on rich practical experience and professional knowledge, the inventor finally created the present invention after continuous research, design, repeated trial production of samples and improvements, so that it can be used Inexpensive raw materials are used to make a wooden steering wheel with a more solid structure, a more detailed appearance, a high-quality texture, and a safer use, which is industrially utilizable.

The main purpose of the present invention is to overcome the deficiencies of the prior art and provide a method for manufacturing an automobile steering wheel, in which the glue made with a specific formula is mixed with waste wood chips to make bakelite raw materials, and then put in the powder tank Add the central skeleton to make a prototype, and then cover the outer surface with log sheets, heat and press the mold to make a steering wheel with excellent strength and aesthetic appearance.

The second object of the present invention is to provide a method for manufacturing an automobile steering wheel, which uses cheap wood chips as one of the raw materials in the manufacturing process, and cooperates with adhesives to form integrally with the inner frame of the steering wheel, so as to obtain a strong and durable steering wheel. Finished steering wheel.

Another object of the present invention is to provide a method for manufacturing an automobile steering wheel, so that in the manufacturing process, multi-layer log sheets and cotton cloth soaked in glue are used to form the surface material of the steering wheel, so that the appearance and appearance of the original wood grain can be obtained. Finished steering wheel with excellent toughness.

Another object of the present invention is to provide a method for manufacturing an automobile steering wheel, in which the steering wheel is molded by pressurizing a mold during the manufacturing process to produce a finished steering wheel with fine shape and soft and round concave and convex parts.

The purpose of the present invention is achieved by the following technical solutions. A method for manufacturing an automobile steering wheel, characterized in that: mixing an appropriate proportion of glue with wood chips, stirring for 30-40 minutes to form a bakelite raw material, and putting the bakelite raw material together with a metal skeleton of a steering wheel into a powder tank Slightly pressurize the bakelite raw material to cover the metal skeleton, then put the powder tank upside down in the mold, take out the powder tank, and go through the molding process of heating and pressing for the first time to make a prototype of the steering wheel, and take it out from the mold After the prototype, put the upper and lower surface materials and the prototype into the mold, and then go through the second heating and pressing molding process. After warm demoulding, the log surface raw material is coated with the inner bakelite raw material and Automobile steering wheel with metal skeleton; the glue mentioned therein refers to the raw material components such as formerin, urea, melamine, ammonia water, etc., which are prepared at a temperature of 80°C. The raw materials and composition ratio are: formerin 69%, 15% urea, 10% melamine, and 6% ammonia water; the raw materials for the surface layer include at least three layers of straight-grained veneer and at least one layer of horizontal-grained veneer after the surface has been treated with glue. , and a layer of cotton cloth are superimposed. When stacking, two layers of straight-grained veneer are first bonded, followed by a layer of horizontal-grained veneer on the bottom, and then a layer of straight-grained veneer. Wood chips, and finally use a layer of cotton cloth as the contact surface of the steering wheel to make the surface material.

The purpose of the present invention can also be further achieved through the following technical measures.

The aforementioned manufacturing method of the automobile steering wheel, wherein the wood chips are broken and ground into fine fibers by waste wood, and the required wood chips are obtained after dust removal; or, other plant rod diameters with long and thin fibers are used to replace Waste wood, which is broken, ground into fine fibers, and wood chips obtained after removing dust.

The manufacturing method of the aforementioned automobile steering wheel, wherein the bakelite raw material is made by using 35Kg of sawdust, mixing 9Kg of glue, and stirring for 30-40 minutes.

The aforementioned manufacturing method of the automobile steering wheel, wherein the powder trough is composed of an outer frame wall and an inner frame wall, and a plurality of connecting plates are arranged between the two to position it, and a powder tank is formed between the two frame walls. There is a space for accommodating Bakelite raw materials and metal frames. There is a bottom pad at the bottom of the powder tank, and a groove is provided on the wall of the inner frame wall to place the tripod of the metal frame.

The manufacturing method of the aforementioned automobile steering wheel, wherein the manufacturing process of the powder tank is to put the bakelite raw material into the powder tank to about 1/2 capacity, then put the metal skeleton of the steering wheel, and then put 1/2 the bakelite raw material cloth Fill the powder tank, pressurize slightly to make it tight, and then wrap the metal skeleton inside the bakelite raw material.

The manufacturing method of the aforementioned automobile steering wheel, wherein the mold includes a bottom mold and an upper mold, which are located on the contact surface of the bottom mold and the upper mold, and are respectively provided with mold grooves for accommodating the steering wheel. At the center, corresponding to the positions of the screw holes on the tripod in the middle of the metal skeleton, there are at least two pin holes for inserting two pins. When the upper mold is pressed down and contacts the bottom mold, the two The upper and lower ends of the bolt are respectively inserted into the pin holes corresponding to the center positions of the upper die and the lower die to form positioning points for fixing the metal skeleton in the molding process.

The manufacturing method of the aforementioned automobile steering wheel, wherein the first molding process is to set the temperature of the upper mold and the bottom mold of the mold at 140-150°C, pressurize the hydraulic press at 150P, release the pressure after 8 minutes of pressurization, and obtain the steering wheel prototypes.

The manufacturing method of the aforementioned automobile steering wheel, wherein the second molding process is to put the surface material into the cavity of the bottom mold with a cotton cloth layer upwards, then place the steering wheel prototype, and finally put another surface material Place the cotton cloth layer on the upper end of the prototype of the steering wheel, set the temperature of the upper mold and the lower mold of the mold to 140-150°C, and the pressure of the hydraulic press to 150P, pressurize for five minutes and release the pressure, cool down and demould , to obtain the finished automobile steering wheel whose surface is coated with the inner bakelite raw material and the metal skeleton.

Compared with the prior art, the present invention has obvious advantages and positive effects. It can be seen from the above technical scheme that the present invention mainly uses formaldehyde, urea, melamine, ammonia and other raw material components in appropriate proportions to prepare glue at an appropriate temperature; the waste wood is crushed and ground into fine Fiber, after removing the dust, add the glue and mix to form the bakelite raw material; put the bakelite raw material into the steering wheel powder tank about 1/2 capacity, then put the steering wheel skeleton, and then put another 1/2 bakelite raw material to cover the powder tank, After slightly pressurizing, put the powder tank upside down in the mold, take out the powder tank, and make the steering wheel raw material heated and pressurized by the mold to form a steering wheel prototype; after removing the prototype, put the upper, The lower two surface materials are put into the prototype, heated and pressurized, cooled and demoulded, and the automobile steering wheel with the inner layer bakelite material and metal skeleton covered on the surface of the log is obtained. The glue made with a specific formula is mixed with waste wood chips to make bakelite raw materials, and then the central skeleton is added to the powder tank to make a prototype, and then the outer surface is covered with log flakes, and the mold is heated and pressurized. It can be made into a steering wheel with excellent strength and aesthetic appearance; it uses cheap wood chips as one of the raw materials in the manufacturing process, and the adhesive is integrally formed with the inner frame of the steering wheel, so that a durable finished steering wheel can be obtained ; During the manufacturing process, the surface material of the steering wheel is formed by using multi-layer log sheets and cotton cloth soaked in glue, and a finished steering wheel with a log-grain appearance and excellent toughness can be obtained; during the manufacturing process, the steering wheel is formed by pressing the mold , and can be made into a finished steering wheel with fine shape and soft and round concave and convex parts.

To sum up, the present invention can be made into a car steering wheel whose surface is coated with bakelite material and skeleton in the inner layer. It has excellent robustness and aesthetic appearance, has industrial utilization value, and has substantial practicability. It is greatly improved no matter in structure or function, and it is a novel, progressive and practical new design.

The specific manufacturing method and structure of the present invention are given in detail by the following examples and accompanying drawings.

Fig. 1 is a block diagram of the manufacturing process of the present invention.

Fig. 2 is a three-dimensional view of the powder tank and skeleton structure used in the manufacturing process of the present invention.

Fig. 3 is an exploded perspective view of the structure of the surface material used in the manufacturing process of the present invention.

Fig. 4 is an exploded perspective view of a mold and a steering wheel prototype used in the manufacturing process of the present invention.

Fig. 5 is a sectional view of a mold used in the manufacturing process of the present invention.

Below in conjunction with accompanying drawing and preferred embodiment, to the manufacture method of the automobile steering wheel proposed according to the present invention its specific method, structural feature and effect, detail as follows.

See also shown in Fig. 1, the manufacturing method of automobile steering wheel of the present invention, its manufacturing process is: use glue 10 through special formula, mix with sawdust 11 with appropriate ratio, form bakelite raw material 12 after stirring for 30-40 minutes; The bakelite raw material 12 together with the metal frame 50 of a steering wheel is put into the powder tank 20 for a little pressurization, so that the bakelite raw material 12 is coated on the metal frame 50; Heat and pressurize for the first time to make the steering wheel prototype 13. After the prototype 13 is taken out from the mold, the upper and lower surface materials 40 and the prototype 13 are placed in the mold 30. After the second heating After pressurization, cooling and demoulding, a car steering wheel in which the surface material 40 of the log is coated with the bakelite material 12 of the inner layer and the metal skeleton 50 can be obtained. The glue 10 used in the above manufacturing process refers to the preparation of raw materials such as formerin, urea, melamine, and ammonia water at an appropriate temperature of 80°C. The raw materials and composition ratio are as follows:

Formulin 69%

Urea 15%

Melamine 10%

Ammonia 6%;

The pre-prepared glue 10 can be mixed with wood chips 11 to form the required bakelite raw material 12, and can be used to bond and form the veneer layers and cotton cloth layers of the steering wheel surface raw material 40.

The aforementioned sawdust 11 is broken and ground into fine fibers by waste wood, and the required sawdust 11 is obtained after removing the dust; or, use other plant rod diameters with thin and long fibers to replace the waste wood and break it into pieces , Grind into fine fibers, and the required sawdust 11 can also be obtained after removing the dust.

The aforementioned bakelite raw material 12 is made by mixing 35Kg of sawdust 11 with 9Kg of glue and stirring. After mixing and stirring, the bakelite raw material 12 is viscous, and the next powder is carried out with the metal skeleton 50 of the steering wheel. Groove manufacturing process.

Please refer to shown in Fig. 2, the manufacturing process of the powder tank of the present invention is to utilize the powder tank 20 shown in the figure to make the metal skeleton 50 be coated in the bakelite raw material 12; the powder tank 20 includes an outer frame Wall 21, an inner frame wall 22, between the two is provided with a plurality of connecting plates 23 to position them, so that a space for accommodating bakelite raw material 12 and metal skeleton 50 is formed between the two outer frame walls 21 and the inner frame wall 22 Space, the bottom of the powder tank 20 is provided with a bottom pad 24, in order to stop the bakelite raw material 12 in the powder tank 20 from leaking downward, and the wall surface of the inner frame wall 22 is provided with a groove 25, in order to insert the metal skeleton 50 The tripod 51.

The metal frame 50 comprises a solid circular outer frame and a Y-shaped tripod 51 in the frame. The threaded hole 52 is used to lock the steering wheel on the vehicle body. In the manufacturing process of the present invention, the threaded hole 52 can be used as a required positioning point for the molding process described later.

Put the aforementioned bakelite raw material 12 into about 1/2 of the capacity in the space between the two outer frame walls 21 and the inner frame wall 22 in the powder tank 20, then put into the metal skeleton 50 of the steering wheel, and then put into another 1/2 2. The bakelite material 12 is covered with the powder tank 20, and after a little pressurization to make it compact, even if the metal skeleton 50 is coated inside the bakelite material 12, the next molding process can be carried out.

Please refer to Fig. 4 and shown in Fig. 5, the molding process of heating and pressing for the first time and the molding process of heating and pressing for the second time of the present invention all utilize the mold 30 shown in the figure to make the above-mentioned The bakelite raw material 12 with the metal skeleton 50 inside becomes the finished steering wheel; the mold 30 includes a bottom mold 31 and an upper mold 32, which are located on the contact surfaces of the bottom mold 31 and the upper mold 32, and are respectively provided with molds for accommodating the steering wheel. Groove 33 is located at the center of mold cavity 33, corresponding to the position of screw hole 52 set on the tripod 51 in the middle of metal skeleton 50, is provided with at least two pin holes 34 respectively, in order to insert two latches 35, when upper mold 32 when pressing down and contacting bottom mold 31, just can make the upper and lower ends of these two bolts 35, put respectively in the corresponding pin hole 34 of upper mold 32 and bottom mold 31 central positions (as shown in Figure 5), borrow This is used as a positioning point for fixing the metal frame 50 so that the metal frame 50 and the bakelite raw material 12 covered by the metal frame 50 can be located in the correct position in the mold cavity 33 .

The process of molding for the first time is: the above-mentioned powder tank 20, together with the bakelite raw material 12 covering the metal skeleton 50, is placed upside down on the bottom mold 31 of the mold 30 (bottom mold 31 as shown in Figure 4 ), at this time , the aforementioned at least two bolts 35 have been inserted into the pin holes 34. During the inversion, the two screw holes 52 in the middle of the metal frame 50 in the powder tank 20 need to be sleeved on the two bolts 35. After inversion, remove the The powder tank 20, even if the bakelite raw material 12 covering the metal skeleton 50 is located in the correct position in the mold cavity 33; set the temperature of the upper mold 32 and the bottom mold 31 of the mold 30 to 140-150°C; the pressure of the hydraulic press is 150P, pressurize for 8 minutes After the pressure is released, the prototype 13 of the steering wheel is obtained.

After the prototype product 13 is taken out from the mold, in the same mold 30, the upper and lower surface materials 40 are respectively inserted into the upper and lower ends of the prototype product 13, and then the second molding process is carried out.

The surface material 40, as shown in Figure 3, comprises at least three layers of straight-grain veneer 41, at least one layer of horizontal-grain veneer 42, and one layer of cotton cloth layer 43 after the surface has been treated with glue 10. In order to match the shape of the steering wheel, each of the single-layer veneer and cotton cloth layer is pre-cut into a shape with a round hole in the middle before the cloth glue is stacked. 1. Stick one layer of horizontal grain veneer 42 on the bottom in sequence, then stick one layer of straight grain veneer 41, and finally use one layer of cotton cloth layer 43 as the contact surface of the steering wheel to complete the manufacture of surface material 40.

As shown in Figure 4, the molding process of heating and pressurizing for the second time is: earlier this surface layer raw material 40 is put into the die groove 33 of bottom mold 31 upwards (to contact the prototype product of steering wheel) with cotton cloth layer 43, then place Put the prototype 13 of the steering wheel, and finally another surface material 40 is placed on the upper end of the prototype 13 of the steering wheel with the cotton layer 43 downwards (to contact the prototype of the steering wheel); In the action of the product 13, the two screw holes 52 on the tripod in the middle of the prototype 13 should also be sleeved on the two pins 35 in the middle of the mold 30, so that the prototype 13 of the steering wheel can be positioned in the mold cavity. 33 in the correct position; set the temperature of the upper mold 32 and the bottom mold 31 of the mold 30 to 140-150°C, and the pressure of the hydraulic press to 150P. After five minutes of pressurization, the pressure is released. The finished automobile steering wheel 14 covered with the inner bakelite raw material 12 and the metal skeleton 50 .

The straight grain veneer 41 and the horizontal grain veneer 42 of the above-mentioned surface layer raw material 40 are to use walnut wood chips or printed paper with natural wood grain; Wood chips 42 and glue 10 are stacked at intervals, and the bottom layer is provided with a tough cotton layer 43. During the molding operation, the surface of the steering wheel will not be cracked due to the compression of the concave-convex arc shape in the mold groove 33. , after the pressure treatment, the surface of the steering wheel can have excellent toughness, and because of the metal skeleton 50 inside, the finished product of the steering wheel has excellent strength and surface temperature resistance, and the surface of the steering wheel appears log-like texture.

Because wood chips 11 are easy to obtain, and the molding price of wood glue raw materials is lower than that of logs, so the cost can be reduced; moreover, the detailed shape of the steering wheel surface, such as finger grooves, functional curved surfaces, curved surfaces, etc., can be made during manufacturing. The mold 30 is designed and determined in advance, and is molded at one time, thus simplifying the processing process of the semi-finished steering wheel, and can be made into various steering wheels according to the needs of the order.

In addition, the wood veneer and sawdust completely cover the metal frame 50 as a whole. Because the bakelite raw material 12 has good uniformity after heating and pressing, the quality and strength of the steering wheel are very uniform and stable after pressurization, and the surface of the wood chips is sealed and pressurized. , with the inner layer of sawdust, it has no cracks and no shape, and can be used in areas with different dryness, humidity and temperature changes, and can always ensure the stability of its strength and function, which can improve the safety of use.

The above is only a preferred embodiment of the present invention, and does not limit the present invention in any way. All simple modifications, changes and equivalent structural changes made to the above embodiments according to the technical essence of the present invention still belong to this invention. within the scope of the technical solution of the invention.

Claims (8)

1, a kind of manufacture method of automobile steering wheel, it is characterized in that: Mix an appropriate proportion of glue with wood chips, and stir for 30-40 minutes to form a bakelite raw material. Put the bakelite raw material together with the metal frame of a steering wheel into a powder tank for slight pressure, so that the bakelite raw material is coated on the metal frame. , and then put the powder tank upside down in the mold, take out the powder tank, and make the prototype of the steering wheel through the first heating and pressurizing molding process. The two surface materials and the prototype are subjected to a second heating and pressurizing molding process, and after warm demoulding, the automobile steering wheel with the log surface material covering the inner bakelite material and the metal skeleton is obtained; The glue mentioned therein refers to the raw material components such as formerin, urea, melamine, ammonia water, etc., which are first prepared at a temperature of 80 ° C. The raw materials and composition ratio are as follows: Formulin 69% Urea 15% Melamine 10% Ammonia 6%; The surface layer materials mentioned therein include at least three layers of straight-grain veneer, at least one layer of horizontal-grain veneer, and a layer of cotton cloth after the surface has been treated with glue. Two layers of straight-grain veneer are bonded together, followed by a layer of horizontal-grain veneer at the bottom, followed by a layer of straight-grain veneer, and finally a layer of cotton cloth as the contact surface of the steering wheel. Surface material. 2. The method for manufacturing an automobile steering wheel according to claim 1, wherein the sawdust is broken and ground into fine fibers from waste wood, and the required sawdust is obtained after dust is removed; or, other wood chips are used Plant stems with long and thin fibers, replacing waste wood, breaking it, grinding it into fine fibers, and removing dust. 3. The manufacturing method of the automobile steering wheel according to claim 1, wherein said Bakelite raw material is made by mixing 35Kg of sawdust with 9Kg of glue and stirring for 30-40 minutes. 4. The manufacturing method of the automobile steering wheel according to claim 1, wherein said powder trough is composed of an outer frame wall and an inner frame wall, and a plurality of connecting plates are arranged between the two to connect them. Positioning, a space is formed between the two frame walls for accommodating bakelite raw materials and metal skeletons, a bottom pad is provided at the bottom of the powder tank, and a groove is provided on the wall surface of the inner frame wall for placing the triangular parts of the metal skeleton. shelf. 5. The manufacturing method of the automobile steering wheel according to claim 1, characterized in that the manufacturing process of the powder tank is to put bakelite raw materials into the powder tank to about 1/2 capacity, and then put the metal skeleton of the steering wheel , and then put 1/2 of the bakelite raw material to cover the powder tank, pressurize slightly to make it tight, and then wrap the metal skeleton inside the bakelite raw material. 6. The manufacturing method of an automobile steering wheel according to claim 1, wherein said mold comprises a bottom mold and an upper mold, and is located on the contact surface of the bottom mold and the upper mold, respectively provided with accommodating The mold groove for placing the steering wheel is located in the center of the mold groove, corresponding to the positions of the screw holes set on the tripod in the middle of the metal skeleton, and is respectively provided with at least two pin holes for inserting two bolts. When the upper mold is pressed down and When contacting the bottom mold, the upper and lower ends of the two bolts can be inserted into the pin holes corresponding to the center positions of the upper mold and the bottom mold respectively, so as to form the positioning points for fixing the metal skeleton in the molding process. 7. The manufacturing method of the automobile steering wheel according to claim 1, wherein the first molding process is to set the temperature of the upper mold and the lower mold of the mold at 140-150°C, the pressure of the hydraulic press at 150P, and add After pressing for 8 minutes, the pressure was released to obtain the prototype of the steering wheel. 8. The method of manufacturing an automobile steering wheel according to any one of claims 1 to 7, characterized in that the second molding process is to put the surface material into the cavity of the bottom mold upwards in the form of cotton cloth , then place the prototype of the steering wheel, and finally put another surface material down with a cotton cloth layer on the upper end of the prototype of the steering wheel, set the temperature of the upper mold and the bottom mold of the mold to 140-150°C, press the pressure of the hydraulic press Set it to 150P, release the pressure after five minutes of pressurization, cool down and demould, and obtain the finished automobile steering wheel whose surface is covered with the inner bakelite raw material and the metal skeleton.

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