Production method of automotive upholstery with soft-touch skin material

Abstract

The invention discloses a preparation method of an automotive upholstery with a soft-touch skin material, which adopts a rotary three-color integrated injection mold for preparation, and comprises the following steps: firstly, using a one-color cavity for injection molding of a product skeleton, after the one-color product skeleton is cooled and shaped, rotating the mold, and using a two-color cavity for injection molding of a product made of a foaming material, so as to obtain the automotive upholstery with the soft-touch skin material. Forming an intermediate product with a soft material surface; after the two-color intermediate product is cooled and shaped, the mold rotates again, and the three-color cavity is used for injection molding of the product made of the soft-touch skin material, so that the automobile interior trim part made of the soft-touch skin material is formed; and after the three-color automobile interior trim part is cooled and shaped, rotating the mold again, returning the mold to the initial position, opening the mold, and taking out the product. According to the invention, the three traditional procedures of injection molding, coating and pressing are integrated into one procedure, so that the automation and integration of the production process are realized, the production efficiency and quality consistency of the automotive upholstery are improved, and the problems existing in the traditional production method of the automotive upholstery are solved.

Description

Technical Field

[0001] The invention relates to the technical field of automobile interior decoration production, in particular to a method for preparing an automobile interior decoration with a soft-touch surface material. Background Art

[0002] With the continuous development of the automobile industry, consumers have increasingly higher requirements for the comfort and aesthetics of automobile interiors. In particular, the selection and processing technology of soft-touch surface materials for parts of interiors that come into contact with the human body, such as dashboards, door panels, armrests, etc., have become the focus of attention in the industry.

[0003] In traditional automotive interior processing technology, for areas that require soft-touch surface materials, soft materials such as non-woven fabrics or artificial leather are usually used, which are manually coated on plastic parts with glue and pressed with special tools to ensure a firm bond between the surface material and the plastic parts. That is, the traditional production method usually includes three independent processes: injection molding, coating, and pressing. Although this production method meets the manufacturing needs of the product to a certain extent, it has many problems and limitations in actual operation.

[0004] First, in the traditional production method, the three processes of injection molding, coating and lamination are carried out in series, that is, one process can be carried out only after the next process is completed, and parallel operations are not possible. This not only leads to low production efficiency, but also increases production costs. At the same time, since the entire production process requires multiple changes in workplaces and equipment, the defective rate of products is increased, and it is easy to cause problems such as dimensional errors and color inconsistencies.

[0005] Secondly, in the traditional production method, the coating and lamination processes are highly dependent on manual operation. This not only requires operators to have a high level of skills, but the instability and uncertainty of manual operation can easily lead to inconsistency in product quality. In addition, manual operation also increases safety hazards in the production process. Summary of the invention

[0006] The present invention provides a method for preparing an automotive interior decoration part with a soft-touch surface material, which is a brand-new preparation method - the whole product adopts a rotary three-color integrated injection molding technology. The preparation method integrates the three traditional processes of injection molding, coating and pressing into one process, realizes the automation and integration of the production process, improves the production efficiency and quality consistency of automotive interior decoration parts, and thus solves the problems existing in the above-mentioned traditional automotive interior decoration production methods.

[0007] In order to solve the above technical problems, the technical solution adopted by the present invention is: The invention adopts a rotating three-color injection mold to prepare the product, and the preparation method comprises the following steps: A. First, use a single-color cavity to mold the product skeleton, which is made of hard plastic material; B. When the one-color product skeleton is cooled and shaped, the three-color one-piece injection mold is rotated, and the two-color cavity is used to inject the foaming material product, so that the foaming material and the one-color product skeleton are integrally injection molded to form an intermediate product with a soft material surface; C. After the two-color intermediate product is cooled and formed, the rotating three-color one-piece injection mold is rotated again, and the three-color cavity is used to inject a product with a soft-touch skin material. The soft-touch skin material is integrally injection-molded with the two-color intermediate product to form an automotive interior part with a soft-touch skin material; D. When the three-color automotive interior parts are cooled and shaped, the rotating three-color one-piece injection mold rotates again. At this time, the rotating three-color one-piece injection mold returns to the initial position, and the rotating three-color one-piece injection mold is opened to take out the product.

[0008] In the above technical scheme, a more specific technical scheme can also be: in step B, the three-color one-piece injection mold is rotated 120°, in step C, the three-color one-piece injection mold is rotated 120°, and in step D, the three-color one-piece injection mold is rotated 120°.

[0009] Furthermore, the hard plastic material of the single-color product skeleton is polypropylene or polycarbonate.

[0010] Furthermore, the foaming material is polyurethane.

[0011] Furthermore, the soft-touch surface material is thermoplastic vulcanized rubber.

[0012] Due to the adoption of the above technical solution, the present invention has the following beneficial effects compared with the prior art: 1. Improve production efficiency: The present invention integrates three processes into one process, which reduces the conversion time and waiting time in the production process, thereby improving production efficiency.

[0013] 2. Improve product quality consistency: Since the entire production process of the present invention is completed in a closed mold system without manual intervention, the dimensional accuracy and color consistency of the product are greatly improved.

[0014] 3. Reduce production costs: The present invention reduces the conversion time and waiting time in the production process, and reduces the dependence on manual operation, thereby reducing production costs.

[0015] 4. Enhanced safety: Since the present invention does not require human involvement in high-risk operation processes, it reduces potential safety hazards in the production process.

[0016] 5. In summary, the rotary three-color integrated injection molding technology of the present invention, as a new method for producing automotive interior parts, has significant advantages and broad application prospects. It can not only improve production efficiency and product quality consistency, but also reduce production costs and enhance safety. Therefore, this technology is expected to be widely used and promoted in the field of automotive interior parts manufacturing in the future. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] Figure 1 The present invention is a schematic diagram of a method for preparing an automobile interior decoration product with a soft-touch surface material in the prior art.

[0018] Figure 2 This is a schematic diagram of step A of the present invention.

[0019] Figure 3 This is a schematic diagram of step B of the present invention.

[0020] Figure 4 This is a schematic diagram of step C of the present invention.

[0021] Figure 5 This is a schematic diagram of step D of the present invention.

[0022] Figure 6 The present invention is a schematic structural diagram of a rotary three-color injection mold used in the present invention.

[0023] Figure 1 The numbers represent: 1 - single-color injection molding product, 2 - single-color injection molding inlet, 3 - material with soft-touch surface.

[0024] Figure 2-Figure 6 The numbers represent: 4 - one-color injection molding cavity, 5 - one-color injection molding product, 6 - one-color injection molding inlet, 7 - core, 8 - two-color injection molding cavity, 9 - two-color injection molding product, 10 - two-color injection molding inlet, 11 - three-color injection molding cavity, 12 - three-color injection molding product, 13 - three-color injection molding inlet. DETAILED DESCRIPTION

[0025] The present invention is further described in detail below with reference to examples; Among them, the present invention uses a rotating three-color injection mold, and the injection mold has been disclosed with related technologies and products before the present invention. For example, the patent named "Horizontally rotating three-color injection molding structure and mold" (patent application number: 202310240696.4) mentions a three-color injection mold that can rotate horizontally, which can meet the preparation needs of the present invention. In addition, although the present invention provides Figure 6 A rotating three-color injection mold is shown, but the present invention is not limited to use Figure 6 The present invention is prepared. Figure 6It only provides a general schematic diagram of a rotating three-color injection mold, which can rotate and switch to different cavities; the rotation of the mold can be driven by an electric motor or a pneumatic device, and the rotation angle of the mold can be regulated by a precise control system; the mold can also include a robot for automatically removing the product, which can be used to automatically identify the position of the mold and accurately remove the product.

[0026] The invention adopts a rotating three-color injection mold to prepare the product, and the preparation method comprises the following steps: A. Use a single-color cavity to mold the product skeleton, which is made of hard plastic material; this step provides a solid foundation for the subsequent bonding between layers; B. After the one-color product skeleton is cooled and shaped, the mold is rotated 120°, and the two-color cavity is used to inject the foaming material product. This step adopts the closed mold foaming process to make the foaming material and the one-color product skeleton integrally injection molded to form an intermediate product with a soft material surface; during this process, physical and chemical reactions will occur between the materials to form a strong bonding force, especially the expansion and solidification of the foaming material is more conducive to enhancing the adhesion between the foaming material and the one-color product skeleton; C. After the two-color intermediate product is cooled and formed, the mold is rotated 120 degrees again, and the three-color cavity is used to inject the soft-touch skin material product. The soft-touch skin material and the two-color intermediate product are integrally injection molded to form an automotive interior with a soft-touch skin material; at this time, the soft-touch skin material is tightly bonded with the foaming material and the one-color product skeleton, so even without going through the traditional lamination process, the adhesion between the layers can still be guaranteed. This is because the injection molding process itself has the characteristics of integrated molding, material fusion and precise control, which can ensure the tight bonding between different material layers; D. After the three-color automotive interior parts are cooled and shaped, the mold rotates 120° again, and then returns to its initial position. The mold opens and the product is automatically taken out by the robot.

[0027] In the above preparation method, the hard plastic material is preferably selected from one or more of polypropylene and polycarbonate according to specific actual conditions, but is not limited to it.

[0028] Similarly, the foaming material is preferably selected from but not limited to polyurethane.

[0029] The soft-touch surface material is preferably selected from but not limited to thermoplastic vulcanized rubber.

[0030] It should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention rather than to limit it. Although the present invention has been described in detail with reference to the aforementioned embodiments, those skilled in the art should understand that the technical solutions described in the aforementioned embodiments may still be modified, or some of the technical features may be replaced by equivalents. However, these modifications or replacements do not deviate the essence of the corresponding technical solutions from the spirit and scope of the technical solutions of the embodiments of the present invention.

Claims

1. A method for preparing an automobile interior decoration part with a soft-touch surface material, characterized in that: The invention adopts a rotating three-color injection mold to prepare the product, and the preparation method comprises the following steps: A. First, use a single-color cavity to mold the product skeleton, which is made of hard plastic material; B. When the one-color product skeleton is cooled and shaped, the three-color one-piece injection mold is rotated, and the two-color cavity is used to inject the foaming material product, so that the foaming material and the one-color product skeleton are integrally injection molded to form an intermediate product with a soft material surface; C. After the two-color intermediate product is cooled and formed, the rotating three-color one-piece injection mold is rotated again, and the three-color cavity is used to inject a product with a soft-touch skin material. The soft-touch skin material is integrally injection-molded with the two-color intermediate product to form an automotive interior part with a soft-touch skin material; D. When the three-color automotive interior parts are cooled and shaped, the rotating three-color one-piece injection mold rotates again. At this time, the rotating three-color one-piece injection mold returns to the initial position, and the rotating three-color one-piece injection mold is opened to take out the product.

2. The method for preparing an automobile interior decoration part with a soft-touch surface material according to claim 1, characterized in that: In the step B, the three-color integrated injection mold is rotated by 120°, in the step C, the three-color integrated injection mold is rotated by 120°, and in the step D, the three-color integrated injection mold is rotated by 120°.

3. The method for preparing an automobile interior decoration part with a soft-touch surface material according to claim 1 or 2, characterized in that: The hard plastic material of the single-color product skeleton is one of polypropylene and polycarbonate.

4. The method for preparing an automobile interior decoration part with a soft-touch surface material according to claim 3, characterized in that: The foaming material is polyurethane.

5. The method for preparing an automobile interior decoration part with a soft-touch surface material according to claim 4, characterized in that: The soft-touch surface is made of thermoplastic vulcanized rubber.

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