Method for processing a non-shrinkable automotive interior part structure

Abstract

The application discloses a processing method of an automobile interior part structure which is not prone to shrinkage, and comprises the following steps: providing an interior part substrate; arranging a hot melt resin film on the surface of the interior part substrate; adhering PO foam cotton to the surface of the hot melt resin film; arranging a reinforced fiber cloth layer on the surface of the PO foam cotton; foaming and forming a PU foaming plate on the surface of the reinforced fiber cloth layer; and adhering a skin to the surface of the PU foaming plate. The hot melt resin film, the PO foam cotton, the reinforced fiber cloth layer, the PU foaming plate and the skin are sequentially arranged on the surface of the interior part substrate to form the main structure of the automobile interior part, so that the automobile interior part is not prone to shrinkage and deformation, and the formability of the product is improved.

Description

Technical Field

[0001] This invention belongs to the field of automotive interior parts technology, specifically, it relates to a processing method for an automotive interior parts structure that is not easily shrunk. Background Technology

[0002] The sensory quality of automotive interior parts is receiving increasing attention from customers, and the automotive industry is beginning to shift from hard plastic parts to covered interior parts.

[0003] Currently, most traditional automotive interior parts are injection molded from ABS or PVC materials, and then covered with an outer skin for decoration. When the car body vibrates excessively or the interior temperature is too high, the interior material will shrink and deform. If this continues for too long, the deformation will become more and more serious, leading to abnormal noises and seriously affecting the driving and riding experience.

[0004] Therefore, a structure for automotive interior parts that is not easily shrunk or deformed and has good product consistency is urgently needed for research. Summary of the Invention

[0005] In view of this, the technical problem to be solved by the present invention is to provide a processing method for automotive interior parts structures that are not easily shrunk, so as to avoid the troubles of previous automotive interior parts being prone to shrinkage and deformation, resulting in poor product consistency.

[0006] To address the aforementioned technical problems, this invention discloses a non-shrinkable automotive interior component structure, comprising:

[0007] Interior component base material;

[0008] A hot melt resin film applied to the surface of the interior component substrate;

[0009] PO foam adhered to the surface of a hot melt resin film;

[0010] A reinforcing fiber cloth layer is set on the surface of PO foam;

[0011] PU foam boards foamed onto the surface of reinforcing fiber fabric layers; and

[0012] The outer skin that adheres to the surface of the PU foam board.

[0013] According to one embodiment of the present invention, the above-mentioned reinforcing fiber fabric layer is formed by blending natural fibers and synthetic fibers.

[0014] According to one embodiment of the present invention, the substrate of the interior trim is selected from PVC or ABS.

[0015] A method for processing a non-shrinkable automotive interior component structure, comprising:

[0016] Step a. Provide a mold to injection mold the interior component substrate;

[0017] Step b. Apply a hot melt resin film around the interior trim substrate using a hot air gun;

[0018] Step c. Cut the PO foam, activate the adhesive locally with a drying gun, and then adhere it along the edge of the interior trim substrate;

[0019] Step d. Apply polyurethane adhesive to the reinforcing fiber fabric layer, and then attach the reinforcing fiber fabric layer along the groove of the PO foam;

[0020] Step e. Form a PU foam board on the surface of the interior component substrate using a foaming process;

[0021] Step f. Spray water-based polyurethane adhesive onto the surface of the PU foam board, dry it, then attach the skin using a hot air gun and trim the edges.

[0022] According to one embodiment of the present invention, the temperature of the hot air gun in steps b and f is not higher than 35°C.

[0023] According to one embodiment of the present invention, the thickness of the skin is 1.2 mm.

[0024] Compared with the prior art, the present invention can achieve the following technical effects:

[0025] By sequentially applying a hot-melt resin film, PO foam, reinforcing fiber cloth layer, PU foam board, and skin to the surface of the interior component substrate, the main structure of the automotive interior component is formed, which reduces shock and absorbs sound, while also being less prone to shrinkage and deformation, thus enhancing the product's formability.

[0026] Of course, any product implementing this invention does not necessarily need to achieve all of the technical effects described above at the same time. Attached Figure Description

[0027] The accompanying drawings, which are included to provide a further understanding of the invention and form part of this invention, illustrate exemplary embodiments of the invention and are used to explain the invention, but do not constitute an undue limitation of the invention. In the drawings:

[0028] Figure 1 This is a schematic diagram of a non-shrinkable automotive interior component structure according to an embodiment of the present invention.

[0029] Attached Figure Labels

[0030] Interior trim base material 10, hot melt resin film 20, PO foam 30, reinforcing fiber cloth layer 40, PU foam board 50, surface skin 60. Detailed Implementation

[0031] The following will describe in detail the implementation of the present invention with reference to the accompanying drawings and embodiments, so that the process of how the present invention uses technical means to solve technical problems and achieve technical effects can be fully understood and implemented accordingly.

[0032] Please refer to Figure 1 , Figure 1 This is a schematic diagram of a non-shrinkable automotive interior component structure according to an embodiment of the present invention.

[0033] As shown in the figure, a non-shrinkable automotive interior component structure includes: an interior component substrate 10; a hot melt resin film 20 disposed on the surface of the interior component substrate 10; PO foam 30 adhered to the surface of the hot melt resin film 20; a reinforcing fiber cloth layer 40 disposed on the surface of the PO foam 30; a PU foam board 50 foamed and molded on the surface of the reinforcing fiber cloth layer 40; and a skin 60 adhered to the surface of the PU foam board 50.

[0034] In one embodiment of the present invention, after the interior trim substrate 10 is injection molded according to different molds and inspected for quality issues, a layer of hot melt resin film 20 is adhered to its surface for attaching PO foam 30, providing a certain degree of pressure resistance and shock absorption, while also enhancing sound absorption and improving ride comfort. A reinforcing fiber cloth layer 40 is adhered to the surface of the PO foam 30 for transitional connection to the PU foam board 50, enhancing the tensile strength of the PU foam board 50 and also improving its formability, greatly reducing the risk of shrinkage and deformation, and resulting in better product consistency. The outer skin 60 is selected from genuine leather, which has strong wear resistance and good aesthetics. Furthermore, the thickness of the outer skin 60 is 1.2mm.

[0035] In a preferred embodiment, the reinforcing fiber fabric layer 40 is formed by blending natural and synthetic fibers, exhibiting good tensile strength and high durability.

[0036] The interior component base material 10 is selected from PVC or ABS, which are widely available, lightweight and durable.

[0037] This invention also discloses a method for processing a non-shrinkable automotive interior component structure, comprising:

[0038] Step a. Provide a mold and injection mold the interior part base material 10;

[0039] Step b. Apply a hot melt resin film 20 around the interior trim substrate 10 using a hot air gun;

[0040] Step c. Cut PO foam 30, activate the adhesive locally with a drying gun, and then adhere it along the edge of the interior trim substrate 10;

[0041] Step d. Apply polyurethane adhesive to the reinforcing fiber fabric layer 40, and then attach the reinforcing fiber fabric layer 40 along the groove of the PO foam 30;

[0042] Step e. A PU foam board 50 is formed on the surface of the interior component substrate 10 using a foaming process;

[0043] Step f. Spray water-based polyurethane adhesive onto the surface of the PU foam board 50, dry it, then attach the skin 60 using a hot air gun and trim the edges.

[0044] In steps b and f, the temperature of the hot air gun should not exceed 35°C to avoid over-activation of the adhesive and affecting its adhesion.

[0045] This invention forms the main structure of automotive interior parts by sequentially forming a hot melt resin film 20, PO foam 30, reinforcing fiber cloth layer 40, PU foam board 50, and skin 60 on the surface of the interior part substrate 10. This structure provides shock absorption and sound insulation while being less prone to shrinkage and deformation, thus enhancing the product's formability.

[0046] The foregoing description illustrates and describes several preferred embodiments of the present invention. However, as previously stated, it should be understood that the present invention is not limited to the forms disclosed herein and should not be construed as excluding other embodiments. It can be used in various other combinations, modifications, and environments, and can be altered within the scope of the inventive concept described herein through the foregoing teachings or techniques or knowledge in related fields. Any modifications and variations made by those skilled in the art that do not depart from the spirit and scope of the present invention should be within the protection scope of the appended claims.

Claims

1. A method for processing a non-shrinkable automotive interior component structure, characterized in that, The automotive interior component structure includes: an interior component substrate, wherein the interior component substrate is selected from PVC or ABS; A hot-melt resin film disposed on the surface of the interior component substrate; PO foam adhered to the surface of the hot melt resin film; A reinforcing fiber fabric layer is disposed on the surface of the PO foam, which is formed by blending natural and synthetic fibers. A PU foam board foamed onto the surface of the reinforcing fiber fabric layer; and The skin adhering to the surface of the PU foam board; The processing method includes: Step a. Provide a mold to injection mold the interior component substrate; Step b. Apply a hot melt resin film around the surface of the interior trim substrate using a hot air gun; Step c. Cut the PO foam, activate the adhesive locally with a drying gun, and then adhere it along the edge of the interior trim substrate; Step d. Apply polyurethane adhesive to the reinforcing fiber fabric layer, and then attach the reinforcing fiber fabric layer along the groove of the PO foam; Step e. Form a PU foam board on the surface of the interior component substrate using a foaming process; Step f. Spray water-based polyurethane adhesive onto the surface of the PU foam board, dry it, then attach the skin using a hot air gun and trim the edges.

2. The processing method for the non-shrinkable automotive interior component structure according to claim 1, characterized in that, The temperature of the hot air gun in steps b and f shall not exceed 35°C.

3. The processing method for the non-shrinkable automotive interior component structure according to claim 1, characterized in that, The thickness of the skin is 1.2 mm.

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