Processing technology of slide rail trim

Abstract

The invention discloses a processing technology for a slide rail trim strip, and relates to the technical field of automobile product production technology. The processing technology comprises the following steps: applying adhesive to the surface of a core metal, and conveying the core metal coated with the adhesive toward a co-extrusion module after preheating; heating a foaming agent and a granular TPO substrate to a molten state through a first extruder, and then conveying the mixture toward an input port of the co-extrusion channel; heating a granular low-friction material to a molten state through a second extruder and extruding the mixture toward the input port of the co-extrusion channel; heating a granular TPO substrate to a molten state through a third extruder and extruding the mixture toward the input port of the co-extrusion channel; cooling and forming the slide rail trim strip extruded from the co-extrusion channel, and conveying the mixture to a rolling leather grain machine for leather grain forming of a surface layer; cooling the slide rail trim strip with leather grain printed thereon to room temperature, and then correcting the straightness, and finally cutting the mixture to a fixed length. The processing technology can mass-produce new slide rail trim strips.

Description

Technical Field

[0001] The invention relates to the technical field of automobile product production technology, and in particular to a processing technology for a slide rail trim strip. Background Art

[0002] In the face of energy shortage and air pollution, in order to reduce fuel consumption and exhaust emissions, various automobile manufacturers are promoting automobile lightweighting. Automobile lightweight design has been put on the agenda, of course, including the lightweighting of automobile parts. Automobile lightweighting means that the weight of the automobile must be reduced while ensuring the performance of the automobile, such as strength, rigidity and safety, so as to improve the power performance and fuel economy of the automobile and reduce exhaust pollution. Automobile lightweighting is not just a simple reduction of automobile weight, but also includes many new theories, new materials and new processes.

[0003] The slide rail trim is a structural trim installed on the sliding guide rail of the car seat. Its main function is to reduce the movement resistance of the car seat when it slides and to prevent dust. Existing slide rail trims are all made of dense materials, which have the following main defects: 1. Dense materials have a large density, and the manufactured products are heavy, which is not suitable for lightweight cars; 2. Dense materials have large consumables, and the cost of the products produced is high, which is not conducive to market competition; 3. The product is easy to shrink at different temperatures, resulting in changes in length, affecting the loading and matching effect; 4. The surface of the product is easy to get dirty, which can easily lead to poor appearance of the car trim. At present, the lightweight design of the slide rail trim has been carried out to address the above problems, and a new type of slide rail trim has been improved, but the original old slide rail trim production process cannot produce this new type of slide rail trim. Summary of the invention

[0004] The present invention aims to solve at least one of the above-mentioned technical problems in the prior art to a certain extent. To this end, the present invention provides a processing technology for a slide rail trim strip, which can be used to mass-produce a new type of slide rail trim strip, so that the manufactured new type of slide rail trim strip is lighter in weight, has a beautiful appearance, and is easy to clean the appearance surface.

[0005] The processing technology of the slide rail trim strip according to the embodiment of the present invention comprises a first extruder, a second extruder, a third extruder and a co-extrusion module, wherein the co-extrusion module is provided with a co-extrusion channel matching the shape of the slide rail trim strip, the first extruder is connected to the position of the trim strip body in the co-extrusion channel, the second extruder is connected to the position of the surface layer in the co-extrusion channel, and the third extruder is connected to the position of the connection part of the co-extrusion channel, and the processing technology comprises the following steps:

[0006] S1. Apply adhesive to the surface of the core gold, and convey the core gold coated with adhesive toward the co-extrusion module after preheating;

[0007] S2, mixing the foaming agent with the granular TPO substrate, heating the mixture to a molten state through the first extruder, and then conveying the mixture toward the input port of the coextrusion channel;

[0008] S3, heating the granular low-friction material to a molten state through the second extruder and extruding the granular low-friction material toward the input port of the co-extrusion channel;

[0009] S4, heating the granular TPO substrate to a molten state through the third extruder and extruding it toward the input port of the coextrusion channel;

[0010] S5, cooling and forming the slide rail trim extruded from the co-extrusion channel, and then conveying it to a rolling grain machine for grain forming of the surface layer;

[0011] S6. After the slide rail trim strips with leather grain are cooled to room temperature, they are straightened and finally cut to a fixed length.

[0012] As a further improvement of the above scheme, in step S1, the core gold is continuously conveyed to the co-extrusion channel by a core gold conveyor, and a glue applicator for applying adhesive to the core gold and a high-frequency heater for preheating the core gold coated with adhesive are provided between the co-extrusion module and the core gold conveyor.

[0013] As a further improvement of the above solution, in step S1, the preheating temperature of the core gold is 180°C±10°C.

[0014] As a further improvement of the above solution, in step S1, the adhesive comprises acrylic adhesive.

[0015] As a further improvement of the above solution, in step S2, the mixing ratio of the foaming agent to the TPO substrate is 3:97.

[0016] As a further improvement of the above solution, in step S5, a shaping die is connected to the high-temperature extrusion section of the co-extrusion module, and the shaping die is placed in a first cooling water tank.

[0017] As a further improvement of the above scheme, the cooled and formed slide rail trim needs to be preheated before leather grain forming. A preheater is provided between the shaping mold and the leather grain rolling machine, and the surface temperature of the cooled and formed slide rail trim is preheated to 65°C±10°C by the preheater.

[0018] As a further improvement of the above solution, the heating temperature in the co-extrusion module is 170°C to 210°C.

[0019] As a further improvement of the above scheme, the first extruder, the second extruder and the third extruder are all screw extruders and are all connected to a controller, which controls the motor speeds of the three extruders respectively to adjust the amount of material entering the co-extrusion module, wherein the internal heating temperature of the first extruder is 160°C to 190°C, and the internal heating temperatures of the second extruder and the third extruder are 170°C to 220°C.

[0020] As a further improvement of the above scheme, the leather rolling machine includes a leather grain wheel and a driven wheel, the rotation center axis of the leather grain wheel is parallel to the rotation center axis of the driven wheel, and a gap matching the slide rail trim is formed between the leather grain wheel and the driven wheel.

[0021] Based on the above technical scheme, the embodiment of the present invention has at least the following beneficial effects: in the above technical scheme, the manufacturing process of the new slide rail trim is to apply adhesive to the manufactured core gold, and then preheat it so that the core gold is in full contact with the adhesive and the adhesive can be completely attached to the outer surface of the core gold. Then, the first extruder is used to heat the foaming agent and TPO substrate mixture with a good ratio to a molten state and convey it to the co-extrusion module, the second extruder is used to heat the low-friction material to a molten state, and the third extruder is used to heat the TPO substrate to a molten state. After completing the above steps, the core gold and each extruder jointly convey the raw materials to the co-extrusion module, and the new slide rail trim is extruded out through the co-extrusion module, and then cooled so that the new slide rail trim is formed. After forming, it is preheated again so that the leather grain machine can press the leather grain texture on the surface layer of the new slide rail trim. Finally, it is cooled, straightened and cut to length in sequence. This new processing technology can be used to mass-produce new slide rail trims. Compared with the old slide rail trims, the new slide rail trims are lighter in weight, more beautiful in appearance and easier to clean, effectively saving raw materials and facilitating the popularization of new lightweight slide rail trims, effectively promoting the process of lightweighting automobiles. BRIEF DESCRIPTION OF THE DRAWINGS

[0022] The present invention is further described below in conjunction with the accompanying drawings and embodiments;

[0023] Figure 1 is a schematic diagram of the production line structure of an embodiment of the present invention;

[0024] Figure 2 Schematic diagram of the structure of the dermatoglyphics machine in an embodiment of the present invention;

[0025] Figure 3 It is a structural schematic diagram of the novel slide rail trim in the present invention. DETAILED DESCRIPTION

[0026] This section will describe in detail the specific embodiments of the present invention. The preferred embodiments of the present invention are shown in the accompanying drawings. The purpose of the accompanying drawings is to supplement the description of the text part of the specification with graphics, so that people can intuitively and vividly understand each technical feature and the overall technical solution of the present invention, but it cannot be understood as a limitation on the scope of protection of the present invention.

[0027] In the description of the present invention, it should be understood that descriptions involving orientations, such as up, down, front, back, left, right, etc., and orientations or positional relationships indicated are based on the orientations or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be understood as a limitation on the present invention.

[0028] In the description of the present invention, "several" means one or more, "more" means more than two, "greater than", "less than", "exceed" etc. are understood as not including the number itself, and "above", "below", "within" etc. are understood as including the number itself. If there is a description of "first" or "second", it is only used for the purpose of distinguishing the technical features, and cannot be understood as indicating or implying the relative importance or implicitly indicating the number of the indicated technical features or implicitly indicating the order of the indicated technical features.

[0029] In the description of the present invention, unless otherwise clearly defined, terms such as setting, installing, connecting, etc. should be understood in a broad sense, and technicians in the relevant technical field can reasonably determine the specific meanings of the above terms in the present invention based on the specific content of the technical solution.

[0030] Reference Figure 3 The slide rail trim of the embodiment of the present invention comprises a long strip trim body 10, wherein Figure 3From the cross-sectional schematic diagram of the slide rail trim shown, it can be seen that the trim body 10 includes a first decorative portion 11, a second decorative portion 12, a third decorative portion 13 and a connecting portion 20 for adapting to the car seat rail. The first decorative portion 11 is connected to the second decorative portion 12 to form the main part of the trim body 10. The outer side surface of the main part is an arc-shaped surface. It should be noted that the outer side surface of the main part is the appearance surface. The outer side surface is an arc-shaped surface, which is more beautiful and better able to withstand stress. Furthermore, the third decorative portion 13 is located on the inner side of the main part and is fixed at the joint between the first decorative portion 11 and the second decorative portion 12. The third decorative portion 13 is used to improve the structural rigidity of the long strip main part, and at the same time, it can also reduce deformation during the molding process, thereby playing a shaping role. The connecting part 20 is connected to the side of the first decorative part 11 away from the second decorative part 12, so as to fix the main part to the car seat rail and cover the car seat rail through the main part to achieve a dustproof effect. The connecting part 20 is made of dense material, so that during the process of fitting and connecting the connecting part 20 with the car seat rail, it can withstand the friction loss caused by the sliding back and forth of the car seat rail, effectively improving the life of the connecting part 20. In addition, the first decorative part 11, the second decorative part 12 and the third decorative part 13 are all made of foaming material. Compared with the main part made of dense material, the main part made of foaming material can reduce the overall weight of the slide rail trim, reduce the material consumption, and ensure the structural stability of the slide rail trim product. The service life is also more durable and beautiful than the original design.

[0031] More importantly, the third decorative part 13 is provided with a core gold 30 made of aluminum inside. When the decorative strip body 10 is manufactured by co-extrusion molding, the core gold 30 made of aluminum is co-extruded together with the foaming material and the dense material so that the core gold 30 can be wrapped by the third decorative part 13. By providing the core gold 30 in the third decorative part 13, it is possible to prevent the product from being shortened due to material shrinkage, thereby affecting the quality of vehicle installation, and the component will also maintain good dimensional stability at different temperatures.

[0032] In addition, the outer side of the main part is covered with a surface layer 40, and the surface layer 40 is made of a low-friction material. The surface layer 40 is covered on the outer side of the main part by co-extrusion molding. Because the trim body 10 is made by co-extrusion molding, the surface layer 40 is also co-extruded together with the trim body 10 to make the connection more stable, and the surface layer 40 is less likely to fall off from the appearance surface of the trim body 10.

[0033] In the embodiment of the present invention, Figure 1As shown, the production line equipment for processing the new slide rail trim includes a first extruder 210, a second extruder 220, a third extruder 230 and a co-extrusion module. The co-extrusion module is provided with a co-extrusion channel matching the shape of the slide rail trim. The first extruder 210 is connected to the position of the trim body 10 in the co-extrusion channel, the second extruder 220 is connected to the position of the surface layer 40 in the co-extrusion channel, and the third extruder 230 is connected to the position of the co-extrusion channel belonging to the connection part 20. When processing the slide rail trim, the steps include:

[0034] S1. Apply adhesive to the surface of the core gold 30. After preheating, the core gold 30 coated with adhesive is conveyed toward the co-extrusion module, wherein the core gold 30 is continuously conveyed to the co-extrusion channel by the core gold conveyor 100. A glue applicator 110 for applying adhesive to the core gold 30 and a high-frequency heater 120 for preheating the core gold 30 coated with adhesive are provided between the co-extrusion module and the core gold conveyor 100. When preheating the core gold 30 coated with adhesive, the preheating temperature is set to 180°C±10°C. At this temperature, the adhesive can be in a molten state, and it is also convenient for the adhesive to be completely attached to the outer surface of the core gold 30, so that when it is co-extruded with other raw materials in the co-extrusion module later, the other raw materials can be connected to the core gold 30 as a whole through the adhesive, so that the structure of the formed slide rail trim is more stable and the size is more stable.

[0035] S2. The foaming agent is mixed with the granular TPO substrate and heated to a molten state through the first extruder 210, and then conveyed toward the input port of the co-extrusion channel. The foaming agent and the granular TPO substrate are mixed in a certain proportion and heated to a molten state to form the above-mentioned foamed material. Compared with the main part of the slide rail trim made of only TPO substrate in the past, the main part made of the foamed material has a density of 65% to 95% of the main part originally made of dense material, which effectively reduces the overall weight of the slide rail trim. It should be noted that the dense material here is made of TPO substrate. Specifically, the mixing ratio of the foaming agent and the TPO substrate is preferably 3:97. The main part structure made under this mixing ratio has a certain rigidity while reducing the overall mass of the main part.

[0036] S3. The granular low-friction material is heated to a molten state by the second extruder 220 and extruded toward the input port of the co-extrusion channel. It should be noted that the low-friction material here is one of polyamide, polytetrafluoroethylene, polyetheretherketone, polyethylene and polyoxymethylene. The surface layer 40 made of these materials has a smoother surface and self-lubricating properties, which facilitates the assembly of the slide rail trim with other parts in the car.

[0037] S4. The granular TPO substrate is heated to a molten state by the third extruder 230 and extruded toward the input port of the co-extrusion channel. After the granular TPO substrate is heated to a molten state, the above-mentioned dense material is formed.

[0038] S5. After the foaming material, dense material and low-friction material are heated to a molten state, they are transported toward the co-extrusion channel together with the core gold 30, wherein the foaming material is transported to the position of the main body in the co-extrusion channel, the dense material is transported to the connecting portion 20 in the co-extrusion channel, the low-friction material is transported to the position of the surface layer 40 in the co-extrusion channel, and the core gold 30 is input into the position of the main body in the co-extrusion channel along with the foaming material, so that the core gold 30 is embedded in the third decorative portion 13 of the main body. The foaming material, dense material, low-friction material and core gold 30 are transported at the same speed so that the co-extrusion channel can transport the foaming material. The material, dense material, low friction material and core gold 30 are co-extruded to form a new type of slide rail trim semi-finished product, which is then extruded from the high-temperature extrusion section. The slide rail trim extruded from the co-extrusion channel is cooled and formed and then conveyed to the leather rolling machine 320 for leather grain forming of the surface layer 40. Among them, a shaping mold is connected to the high-temperature extrusion section of the co-extrusion module, and the co-extruded slide rail trim is shaped and fixed by the shaping mold. The shaping mold is placed in the first cooling water tank 310, which is convenient for the rapid molding of the semi-finished slide rail trim in a high temperature state. The semi-finished slide rail trim is cooled and formed by water cooling so that it can quickly enter the next process.

[0039] The cooled and formed slide rail trim strip needs to be preheated before the leather grain forming. A preheater is provided between the shaping mold and the leather grain rolling machine 320. The preheater is used to preheat the surface temperature of the cooled and formed slide rail trim strip to 65°C±10°C so that the leather grain rolling machine 320 can squeeze the leather grain lines on the surface layer 40. Figure 2 As shown, the leather grain rolling machine 320 includes a leather grain wheel 321 and a driven wheel 322. The rotation center axis of the leather grain wheel 321 is parallel to the rotation center axis of the driven wheel 322. A gap matching the slide rail trim is formed between the leather grain wheel 321 and the driven wheel 322. The semi-finished slide rail trim passing through the gap is pressed out of leather grain lines under the action of the leather grain wheel 321. The surface layer 40 made of low-friction material and the leather grain structure formed on the surface layer 40 can effectively reduce the resistance of the slide rail trim when it is installed with other parts. At the same time, it can also increase the surface color of the appearance surface of the main part, making the appearance more delicate and beautiful, and also make the slide rail trim closer to the appearance of the car interior. After being installed in the car, the interior of the car is more unified. More importantly, the leather grain structure formed by the low-friction material has stronger anti-fouling and anti-dirty ability, which is convenient for cleaning.

[0040] S6. The slide rail trim strip with the embossed leather grain is cooled to room temperature and then corrected for straightness. After the slide rail trim strip with the pressed leather grain is cooled to room temperature through the second cooling water tank 330, it is pulled to the straightness correcting machine 350 by the traction machine 340 for straightness correction. Then, the slide rail trim strip with the straightness corrected is cut to a fixed length by the fixed-length cutting machine 360 ​​connected to the outlet of the straightness correcting machine 350 to form the required slide rail trim strip product.

[0041] Preferably, the adhesive composition here includes acrylic adhesive, so that the aluminum core 30 and the foaming material of the main body are bonded to form an integrated structure.

[0042] Preferably, the TPO substrate is polypropylene, and when the slide rail trim is co-extruded, the heating temperature in the co-extrusion module is 170° C. to 210° C.

[0043] Specifically, the first extruder 210, the second extruder 220 and the third extruder 230 are all screw extruders and are all connected to a controller. The controller controls the motor speeds of the three extruders respectively to adjust the amount of material entering the co-extrusion module. The internal heating temperature of the first extruder 210 is 160°C to 190°C, and the internal heating temperatures of the second extruder 220 and the third extruder 230 are 170°C to 220°C.

[0044] The embodiments of the present invention are described in detail above with reference to the accompanying drawings. However, the present invention is not limited to the above embodiments. Various changes can be made within the knowledge scope of ordinary technicians in the technical field without departing from the purpose of the present invention.

Claims

1. A processing technology for a slide rail trim strip, comprising a first extruder (210), a second extruder (220), a third extruder (230) and a co-extrusion module, wherein the co-extrusion module is provided with a co-extrusion channel matching the shape of the slide rail trim strip, the first extruder (210) is connected to a position of the co-extrusion channel belonging to a trim strip body (10), the second extruder (220) is connected to a position of the co-extrusion channel belonging to a surface layer (40), and the third extruder (230) is connected to a position of the co-extrusion channel belonging to a connection portion (20), the trim strip body (10) comprising a first decorative portion (11), a second decorative portion (12), a third decorative portion (13) and a connection portion (20) for adapting to a car seat rail, The first decorative part (11) is butted against the second decorative part (12) to form a main part of the decorative strip body (10); the outer side surface of the main part is an arc-shaped surface; the third decorative part (13) is located on the inner side of the main part and is fixed to the butt joint between the first decorative part (11) and the second decorative part (12); the connecting part (20) is connected to the side of the first decorative part (11) away from the second decorative part (12); a core gold (30) made of aluminum is provided inside the third decorative part (13); the connecting part (20) is made of a dense material; the first decorative part (11), the second decorative part (12) and the third decorative part (13) are all made of a foamed material; and the invention is characterized in that The steps include: S1, applying adhesive to the surface of the core gold (30), conveying the core gold (30) coated with adhesive toward the co-extrusion module after preheating, and continuously conveying the core gold (30) to the co-extrusion channel through the core gold conveyor (100), a glue applicator (110) for applying adhesive to the core gold (30) and a high-frequency heater (120) for preheating the core gold (30) coated with adhesive are provided between the co-extrusion module and the core gold conveyor (100), the preheating temperature of the core gold (30) is 180°C±10°C, the adhesive comprises acrylic adhesive, and the heating temperature in the co-extrusion module is 170°C to 210°C; S2, mixing the foaming agent with the granular TPO substrate, heating the mixture to a molten state through the first extruder (210), and then conveying the mixture toward the input port of the co-extrusion channel, wherein the mixing ratio of the foaming agent to the TPO substrate is 3:97; S3, heating the granular low-friction material to a molten state through the second extruder (220) and extruding the granular low-friction material toward the input port of the co-extrusion channel; S4, heating the granular TPO substrate to a molten state through the third extruder (230) and extruding the granular TPO substrate toward the input port of the co-extrusion channel; S5, cooling and forming the slide rail decorative strip extruded from the co-extrusion channel, and then conveying it to a rolling leather grain machine (320) for leather grain forming of the surface layer (40), a shaping mold is docked at the high-temperature extrusion section of the co-extrusion module, and the shaping mold is placed in a first cooling water tank (310), and the cooled and formed slide rail decorative strip needs to be preheated before leather grain forming, and a preheater is provided between the shaping mold and the rolling leather grain machine (320), and the surface temperature of the cooled and formed slide rail decorative strip is preheated to 65°C±10°C by the preheater; S6. After the slide rail trim strips with leather grain are cooled to room temperature, they are straightened and finally cut to a fixed length.

2. The processing technology of the slide rail trim according to claim 1, characterized in that: The first extruder (210), the second extruder (220) and the third extruder (230) are all screw extruders and are all connected to a controller. The controller controls the motor speeds of the three extruders respectively to adjust the amount of material entering the co-extrusion module, wherein the internal heating temperature of the first extruder (210) is 160°C to 190°C, and the internal heating temperature of the second extruder (220) and the third extruder (230) is 170°C to 220°C.

3. The processing technology of the slide rail trim according to claim 1, characterized in that: The leather grain rolling machine (320) comprises a leather grain wheel (321) and a driven wheel (322); the rotation center axis of the leather grain wheel (321) is parallel to the rotation center axis of the driven wheel (322); and a gap matching the slide rail decorative strip is formed between the leather grain wheel (321) and the driven wheel (322).

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