A method and device for pressing and laminating an interior frame with grooves

Abstract

The present invention relates to the technical field of coating of interior frames, and in particular to a coating device for an interior frame with grooves, comprising an upper mold and a lower mold, wherein the upper mold is provided with a positioning unit and a fixing unit for positioning and fixing the frame; the lower mold is provided with a vacuum mechanism, a plurality of embedded serrated knives and hanging pins, and the surface of the lower mold is provided with a plurality of air holes, the embedded serrated knives are located above the lower mold, and the cross-section of the embedded serrated knives increases from top to bottom, and the hanging pins are located on both sides of the lower mold. The position of the epidermis on the lower mold is positioned by the hanging pins, the epidermis is adhered to the upper surface of the lower mold by the vacuum mechanism, and the epidermis adsorbed on the upper surface of the lower mold is formed with a plurality of raised lines by the embedded serrated knives, so that when the frame and the epidermis are coated, the embedded serrated knives can embed the raised lines of the epidermis into the grooves of the frame. The present invention has a reasonable design, is conducive to the coating of the epidermis on the frame with grooves, and ensures the quality of the epidermis coating.

Description

Technical Field

[0001] The present invention relates to the technical field of coating of interior decoration frames, and in particular to a coating method and a coating device for a grooved interior decoration frame. Background Art

[0002] With the rapid development of the automotive industry, the production of automotive interior components has increased year by year. Numerous new technologies, materials, and processes have been widely applied to vehicles, significantly improving their power, economy, safety, and comfort. To meet user expectations for automotive interiors, the automotive industry is currently using leather or fabric cladding on interior panels to enhance comfort.

[0003] The commonly used coating technology is the compression coating process, which involves first installing the injection-molded skeleton on the upper mold and the skin on the material frame between the upper and lower molds. During production, the upper mold is pressed down, and the skeleton contacts the fabric and begins to coat. The upper mold continues to press down, pressing the fabric and skeleton together into the lower mold cavity, thus achieving the coating of the skeleton. However, if the surface of the skeleton is uneven, such as when there are grooves on the front of the skeleton, the existing technology has some problems, such as difficulty in embedding the skin into the groove, resulting in the skin and groove not fitting together, or uneven, uneven, and prone to wrinkling. The skin generally has a certain degree of elasticity. If the skin and groove are to fit together, the skin will be pulled, especially the skin near the groove, which will reduce the quality of the product. Summary of the Invention

[0004] The purpose of the present invention is to address the shortcomings of the existing technology and provide a method and device for pressing and laminating an interior frame with grooves, which solves the technical problems of the existing technology that wrinkles, unevenness, and uneven surface covering are easy to occur when laminating the surface of a frame with grooves.

[0005] The technical solution adopted by the present invention to solve the technical problem is: a device for pressing and laminating an interior frame with a groove, comprising an upper die and a lower die, wherein the upper die and / or the lower die are provided with a first driving unit, and the upper die is provided with a positioning unit and a fixing unit for positioning and fixing the frame;

[0006] The lower mold is provided with a vacuum mechanism, several embedded serrated knives and hanging pins. The surface of the lower mold is provided with several air holes. The vacuum mechanism is connected to the air holes. The embedded serrated knife is located above the lower mold. The cross-section of the embedded serrated knife is a structure with a narrow upper part and a wide lower part. The preferred cross-section is a V-shaped structure with a small upper part and a large lower part. The hanging pins are located on both sides of the lower mold. The inclination angle of the embedded serrated knife is consistent with the inclination angle of the groove on the skeleton fixed to the upper mold.

[0007] Furthermore, the hanging needles are located at both ends of the embedded toothed cutter.

[0008] Furthermore, elastic telescopic mechanisms are provided on both sides of the lower mold, and the elastic telescopic mechanisms are located at both ends of the embedded tooth cutter. The upper part of the elastic telescopic mechanism is connected to the embedded tooth cutter, and the lower part is connected to the lower mold.

[0009] Furthermore, the lower mold is provided with an ejection mechanism, which includes a second drive unit and a connecting block. The connecting block is connected to the output end of the second drive unit. The hanging needle is located above the connecting block. A limiting unit is provided above the connecting block to limit the upward position of the embedded tooth knife.

[0010] Furthermore, the hanging needle and / or the connecting block is provided with an adjusting unit for adjusting the position of the hanging needle.

[0011] Furthermore, the upper mold and the lower mold are provided with positioning guide devices.

[0012] On the other hand, a method for laminating a grooved interior frame by pressing a film comprises the following steps:

[0013] Glue spraying: Spray glue on the leather surface of the frame. When spraying glue, first move the glue gun along the direction of the groove, spray glue on each groove once, and then move the glue gun along the direction of the groove arrangement to spray glue again;

[0014] Baking: Place the skeleton in an oven for baking at a temperature of 50-120°C for 30 seconds to 5 minutes. After baking, fix the skeleton with the skin facing downward on the upper mold of the pressing and laminating device.

[0015] Placing the skin: Place the cut skin with the reverse side facing up on the lower die of the laminating device, and hang the skin's hanging holes on the hanging pins of the lower die. The vacuum mechanism of the lower die will absorb the skin onto the surface of the lower die, and the embedded tooth blades will support the skin at intervals, so that the skin absorbed on the lower die forms several raised lines.

[0016] Crimping: Start the crimping and laminating device to crimp and laminate the skeleton and the skin; after laminating, remove the laminated product.

[0017] Furthermore, during the placement of the epidermis, after the epidermis is hung on the hanging needle, the epidermis is pressed along the length direction of the embedded tooth knife.

[0018] Furthermore, during the pressing, the pressure of the pressing laminating device is 0.2 to 1 MPa.

[0019] The beneficial effects of the present invention are:

[0020] 1. The present invention uses a hanging needle to position the skin on the lower mold, a vacuum mechanism to make the skin adhere to the upper surface of the lower mold, and an embedded toothed knife to form a plurality of raised lines on the skin adsorbed on the upper surface of the lower mold. When the skeleton and the skin are pressed against the film, the embedded toothed knife can embed the raised lines of the skin into the grooves of the skeleton, thereby achieving the covering of the skeleton surface and the skin in the grooves;

[0021] 2. The present invention uses an elastic telescopic mechanism connected to both ends of the embedded toothed knife, so that when the film is pressed, the embedded toothed knife moves downward under the elastic telescopic action of the elastic telescopic mechanism, which is beneficial to ensure the quality of the film, avoid wrinkles and unevenness on the surface, and avoid stretching or pulling the surface during groove lamination, which reduces product quality.

[0022] 3. The present invention incorporates an ejection mechanism that separates the embedded serrated blade from the finished laminated product, as well as the product from the lower mold groove. This facilitates product removal from the mold and prevents damage to the product surface caused by the embedded serrated blade or deformation caused by the vacuum mechanism. This rational design and ease of use ensure adherence to the surface of the grooved frame, guaranteeing the quality of the laminated product. BRIEF DESCRIPTION OF THE DRAWINGS

[0023] Figure 1 It is a structural schematic diagram of the present invention.

[0024] Figure 2 yes Figure 1 main view.

[0025] Figure 3 yes Figure 1 Enlarged view of the local structure.

[0026] Figure 4 It is a schematic diagram of the structure of the film-coated product.

[0027] Description of reference numerals:

[0028] 1 - upper die, 2 - lower die, 3 - embedded tooth knife, 4 - hanging needle, 5 - elastic telescopic mechanism, 6 - ejection mechanism, 61 - connecting block, 62 - limiting unit, 7 - positioning guide device, 8 - groove. DETAILED DESCRIPTION

[0029] The present invention will be further described in detail below with reference to the accompanying drawings and specific embodiments, but the scope of implementation of the present invention is not limited thereto.

[0030] It should be noted that the terms "center," "upper," "lower," "left," "right," "vertical," "horizontal," "inner," and "outer," etc., indicating orientations or positional relationships, are based on the orientations or positional relationships shown in the accompanying drawings and are intended solely to facilitate and simplify the description of the present invention. They are not intended to indicate or imply that the devices or components referred to must have, be constructed, or operate in a specific orientation, and therefore should not be construed as limitations on the present invention. Furthermore, the terms "first," "second," and "third" are used for descriptive purposes only and should not be construed as indicating or implying relative importance.

[0031] In the description of the present invention, it should be noted that, unless otherwise expressly specified or limited, the terms "mounted," "connected," and "connected" should be understood in a broad sense. For example, they may refer to fixed, detachable, or integral connections; mechanical or electrical connections; direct or indirect connections through an intermediate medium; and internal communication between two components. Those skilled in the art will understand the specific meanings of the above terms in the present invention based on the specific circumstances.

[0032] like Figure 1-Figure 4 As shown, a grooved interior frame pressing and laminating device of this embodiment includes an upper mold 1 and a lower mold 2, and the upper mold 1 and / or the lower mold 2 are provided with a first driving unit, preferably the first driving unit is connected to the upper mold 1, that is, the first driving unit drives the upper mold 1 to move up and down; the upper mold 1 is provided with a positioning unit and a fixing unit for fixing the frame, preferably, the positioning unit is a positioning column or positioning hole matched with the column on the back of the frame, or a positioning block matched with the frame structure, and the fixing unit is a suction cup or an elastic device that can fix and press the side of the frame, such as an elastic sheet. After the skin is pressed and laminating is completed, when the lower mold 2 moves upward, it is convenient to separate the frame from the upper mold 1;

[0033] The lower mold 2 is provided with a vacuum mechanism, a plurality of embedded serrated knives 3 and hanging needles 4. The number of the embedded serrated knives 3 is consistent with the number of grooves on the surface of the skeleton fixed to the upper mold 1. The surface of the lower mold 2 is provided with a plurality of air holes, and the vacuum mechanism is connected to the air holes. Preferably, the air holes are located between the two embedded serrated knives 3. Through the air holes, the vacuum mechanism makes the skin placed on the lower mold 2 stick to the surface of the lower mold 2; the embedded serrated knife 3 is located above the lower mold 2, and the hanging needles 4 are located on both sides of the lower mold 2. The cross-section of the embedded serrated knife 3 is a structure with a narrow upper part and a wide lower part, preferably gradually increasing from top to bottom, preferably a V-shaped with a small upper part and a large lower part, so that when pressing and laminating, the embedded serrated knife 3 can embed the skin into the groove of the skeleton. The inclination angle of the embedded serrated knife 3 is consistent with the inclination angle of the groove on the skeleton fixed to the upper mold 1, and the embedded serrated knife 3 crosses the upper surface of the lower mold 2.

[0034] The hanging needles 4 are located at both ends of the embedded perforated knife 3, that is, the two ends of each embedded perforated knife 3 are respectively provided with the hanging needles 4. The hanging needles 4 can not only be used to hang the epidermis, but also the hanging needles 4 are arranged at both ends of the embedded perforated knife 3, which is conducive to ensuring the positioning of the groove position formed on the epidermis, thereby helping to ensure the quality of the film when pressing the film.

[0035] An elastic telescopic mechanism 5 is provided on both sides of the lower mold 2. The elastic telescopic mechanism 5 is a telescopic spring or a cylinder. Preferably, the elastic telescopic mechanism 5 is a telescopic spring. The telescopic spring is sleeved with a guide rod. The elastic telescopic mechanism 5 is located at both ends of the embedded tooth knife 3. The embedded tooth knife 3 is connected to the upper part of the elastic telescopic mechanism 5. The elastic telescopic mechanism 5 is vertically arranged. On the one hand, when the upper mold 1 drives the skeleton to move downward to press the skin, the elastic telescopic mechanism 5 drives the embedded tooth knife 3 to move downward to avoid wrinkles on the skin when the skin is embedded in the groove of the skeleton, especially for skeletons with non-planar surfaces, it can well ensure the quality of the skin coating during pressing and laminating, and avoid defects such as unevenness and wrinkles after the skin coating; on the other hand, after the skin is pressed, the elastic telescopic mechanism 5 can drive the embedded tooth knife 3 to move upward, which is convenient for the subsequent separation of the embedded tooth knife 3 and the product.

[0036] The lower die 2 is provided with an ejection mechanism 6, which includes a second drive unit and a connecting block 61. The connecting block 61 is connected to the output end of the second drive unit. Preferably, the second drive unit is a cylinder. The hanging pin 4 is located above the connecting block 61. A limit unit 62 is provided above the connecting block 61 to limit the upward movement of the embedded serrated blade 3. After the lamination is completed, when the product is separated from the lower die 2, the second drive unit drives the connecting block 61 to move downward. During the downward movement, the elastic expansion unit is compressed. Under the limiting action of the limit unit 62, the embedded serrated blade 3 moves downward or rapidly downward with the connecting block 61. Since the surface of the frame contacts the lower die 2, the embedded serrated blade 3 can be separated from the groove of the covering frame. The second drive unit drives the connecting block 61 upward, and the connecting block 61 drives the embedded serrated blade 3 to move upward synchronously. Under the action of the embedded serrated blade 3, the finished product is separated from the lower die 2. That is, the vacuum mechanism in contact with the lower die 2 adsorbs the coated product, facilitating the removal of the finished product.

[0037] The hanging needle 4 and / or the connecting block 61 are provided with an adjustment unit (not shown) for adjusting the position of the hanging needle 4. The adjustment unit is a manual adjustment platform for adjusting the position of the hanging needle 4 in the horizontal plane. The hanging needle 4 is connected to the connecting block 61 through the adjustment unit, or the adjustment unit is an adjustment screw that can adjust the front and back, left and right positions of the hanging needle 4 to adjust the positions of the hanging needle 4 and the connecting block 61 to achieve position adjustment of the hanging needle 4 in the horizontal plane; the adjustment unit also includes a connecting rod, and the connecting block 61 is connected to the second driving unit through the connecting rod, and the connecting rod is threadedly connected to the second driving unit, so that the height of the connecting block 61 and the hanging needle 4 in the vertical plane can be conveniently adjusted through the connecting rod.

[0038] The upper die 1 and the lower die 2 are provided with a positioning guide device 7 for ensuring the clamping accuracy of the upper and lower dies. The positioning guide device 7 can be a guide rod and a guide hole matched with the guide rod.

[0039] The working principle of the present invention is as follows: the skeleton is fixed face down on the upper mold 1, the skin is placed above the embedded perforated blade 3, and positioned using the holes in the skin, and then hung on the hanging pins 4 of the lower mold 2; the vacuum mechanism of the lower mold 2 causes the skin to be adsorbed on the surface of the lower mold 2, and the embedded perforated blade 3 forms multiple raised lines on the skin on the lower mold 2; the upper mold 1 moves downward, pressing the skeleton onto the skin laid on the lower mold 2, achieving pressure lamination of the skeleton. After lamination, if the force exerted by the fixing unit of the upper mold 1 on the skeleton is large, the coated skeleton can move upward synchronously with the upper mold 1, leaving the product on the upper mold 1; alternatively, the coated skeleton can remain on the lower mold 2, and the ejection mechanism 6 can then separate the product from the embedded perforated blade 3 and lower mold 2, making it easier to remove the product.

[0040] A method for laminating an interior frame with grooves by pressing a film, comprising:

[0041] Glue spraying: Spray glue on the leather surface of the frame with a spraying amount of 80-200g / m 2 The preferred amount of glue sprayed is 120g / m 2 When spraying glue, first move the glue gun along the direction of the groove to spray glue on each groove once, and then move the glue gun along the direction of the groove arrangement to spray glue again, which is conducive to ensuring the uniformity of glue spraying;

[0042] Baking: Place the skeleton in an oven and bake at a temperature of 50-120°C, preferably 85±10°C, to activate the glue. The drying time is 30 seconds to 5 minutes, preferably 2-3 minutes. After baking, fix the skeleton with the skin facing downward on the upper mold 1 of the pressing and laminating device.

[0043] Placing the skin: Place the cut skin with the reverse side facing up on the lower die 2 of the pressing and laminating device. Hang the skin by the hanging hole on the hanging pin 4 of the lower die 2. The vacuum mechanism of the lower die 2 absorbs the skin onto the lower die 2. Insert the toothed knife 3 to support the skin at intervals, so that the skin absorbed by the lower die 2 forms several raised lines. The vacuum degree of the vacuum mechanism of the lower die 2 is less than -0.05Mpa.

[0044] Crimping: Start the crimping laminating device to crimp the skeleton and the skin. During crimping, the pressure of the crimping laminating device is 0.2~1Mpa, the preferred system pressure is 0.6±0.1Mpa, and the pressure holding time is 15±5s. After the lamination is completed, remove the laminated product.

[0045] During the placement of the skin, if the skin adsorbed on the lower mold 2 has wrinkles, slightly lift the skin and re-adsorb it or manually flatten it.

[0046] During the placement of the epidermis, after the epidermis is hung on the hanging needle 4, the epidermis is pressed along the length direction of the embedded tooth knife 3, which is conducive to the smooth adsorption of the epidermis on the lower mold 2, and is also conducive to the fit between the epidermis suture position and the skeleton groove during pressing.

[0047] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention, rather than to limit the scope of protection of the present invention. Although the present invention has been described in detail with reference to the preferred embodiments, those skilled in the art should understand that the technical solutions of the present invention may be modified or replaced by equivalents without departing from the essence and scope of the technical solutions of the present invention.

Claims

1. A device for pressing and laminating an interior frame with grooves, characterized in that: It comprises an upper die (1) and a lower die (2), wherein the upper die (1) and / or the lower die (2) are provided with a first driving unit, and the upper die (1) is provided with a positioning unit and a fixing unit for positioning and fixing a skeleton; The lower die (2) is provided with a vacuuming mechanism, a plurality of embedded tooth knives (3) and hanging pins (4); a plurality of air holes are provided on the surface of the lower die (2); the vacuuming mechanism is communicated with the air holes; the embedded tooth knives (3) are located above the lower die (2); the cross section of the embedded tooth knives (3) is a structure with a narrow upper portion and a wide lower portion; the hanging pins (4) are located on both sides of the lower die (2); the inclination angle of the embedded tooth knives (3) is consistent with the inclination angle of the groove on the frame fixed to the upper die (1); Elastic telescopic mechanisms (5) are provided on both sides of the lower die (2). The elastic telescopic mechanisms (5) are located at both ends of the embedded toothed knife (3). The upper part of the elastic telescopic mechanism (5) is connected to the embedded toothed knife (3), and the lower part is connected to the lower die (2).

2. The device for pressing and laminating an interior decoration frame with grooves according to claim 1, characterized in that: The hanging needles (4) are located at both ends of the embedded tooth knife (3).

3. The device for pressing and laminating an interior decoration frame with grooves according to claim 1, characterized in that: The lower mold (2) is provided with an ejection mechanism (6), the ejection mechanism comprising a second drive unit and a connecting block (61), the connecting block (61) being connected to the output end of the second drive unit, the hanging needle (4) being located above the connecting block (61), and a limiting unit (62) for limiting the upward movement position of the embedded tooth knife (3) being provided above the connecting block (61).

4. The device for pressing and laminating an interior decoration frame with grooves according to claim 3, characterized in that: The hanging needle (4) and / or the connecting block (61) are provided with an adjustment unit for adjusting the position of the hanging needle (4).

5. The device for pressing and laminating an interior decoration frame with grooves according to claim 1, characterized in that: The upper die (1) and the lower die (2) are provided with positioning guide devices (7).

6. A method for laminating a grooved interior frame by pressing, characterized in that: The following steps are involved: Glue spraying: Spray glue on the leather surface of the frame. When spraying glue, first move the glue gun along the direction of the groove, spray glue on each groove once, and then move the glue gun along the direction of the groove arrangement to spray glue again; Baking: placing the skeleton into an oven for baking; after baking, fixing the skeleton with the skin-covered surface downward on the upper mold (1) of the pressing laminating device; Placing the skin: Place the cut skin with the reverse side facing upward on the lower die (2) of the pressing and laminating device, hang the hanging hole of the skin on the hanging needle (4) of the lower die (2), and the vacuum mechanism of the lower die (2) adsorbs the skin on the surface of the lower die (2), and inserts the toothed knife (3) to support the skin at intervals, so that the skin adsorbed on the lower die (2) forms a plurality of raised lines; Crimping: Start the crimping and laminating device to crimp and laminate the skeleton and the skin; after laminating, remove the laminated product.

7. The method for laminating a grooved interior frame according to claim 6, characterized in that: During baking, the baking temperature is 50-120°C and the drying time is 30s-5min.

8. The method for laminating a grooved interior frame according to claim 6, characterized in that: During the placement of the epidermis, after the epidermis is hung on the hanging needle (4), the epidermis is pressed along the length direction of the embedded tooth knife (3).

9. The method for laminating a grooved interior frame according to claim 6, characterized in that: During pressing, the pressure of the pressing and laminating device is 0.2~1Mpa.

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