Method and device for pressing and laminating interior framework with groove

Abstract

The invention relates to the technical field of interior framework film covering, in particular to an interior framework pressing and film covering device with grooves, which comprises an upper die and a lower die, and the upper die is provided with a positioning unit and a fixing unit for positioning and fixing a framework; the lower die is provided with a vacuumizing mechanism, a plurality of embedded serrated knives and hanging needles, a plurality of air holes are formed in the surface of the lower die, the embedded serrated knives are located above the lower die, the sections of the embedded serrated knives are sequentially increased from top to bottom, and the hanging needles are located on the two sides of the lower die. The position of the skin on the lower die is positioned through the hanging needle, the skin is attached to the upper surface of the lower die through the vacuumizing mechanism, the skin adsorbed to the upper surface of the lower die forms a plurality of protruding lines through the embedded serrated knife, and therefore when a framework and the skin are pressed to be covered with a film, the skin is attached to the upper surface of the lower die. And the serrated knife is embedded, so that the convex lines of the skin can be embedded into the grooves of the framework. The skin pasting device is reasonable in design, pasting of the skeleton skin with the groove is facilitated, and the skin pasting quality is guaranteed.

Description

Technical Field

[0001] The 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 interior decoration frame with grooves. Background Art

[0002] With the rapid development of the automobile industry, the output of automobile interior parts has increased year by year. A large number of new technologies, new materials and new processes have been widely used in automobiles, which has greatly improved the power, economy, safety and comfort of automobiles. In order to meet the requirements of users for automobile interiors, the automobile manufacturing industry has adopted the method of covering the interior panels with leather or fabric veneer materials to increase comfort.

[0003] The commonly used coating technology is the compression coating process, that is, the injection molded skeleton is first installed on the upper mold, and the skin is installed 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 to press the fabric and the skeleton into the lower mold cavity, thus achieving the coating of the skeleton. However, when the surface of the skeleton is uneven, such as when there is a groove on the front of the skeleton, there are some problems with the existing technology, such as it is difficult to embed the skin into the groove, resulting in the skin not fitting the groove, or the skin of the groove is unevenly coated, uneven, and easy to wrinkle. Generally, the skin has a certain elasticity. If the skin fits the groove, the skin will be pulled, especially the skin near the groove, which reduces the quality of the product. Summary of the invention

[0004] The purpose of the present invention is to address the deficiencies of the prior art and to provide a method and device for pressing and laminating an interior frame with grooves, which solves the technical problems of the prior art that wrinkles, unevenness, and uneven surface coating are easily generated 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 decoration frame with grooves, comprising an upper die and a lower die, wherein the upper die or / and 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, a plurality of embedded serrated cutters and hanging pins. The surface of the lower mold is provided with a plurality of air holes. The vacuum mechanism is connected with the air holes. The embedded serrated cutter is located above the lower mold. The cross-section of the embedded serrated cutter is a structure that is narrow at the top and wide at the bottom. The preferred cross-section is a V-shape that is small at the top and large at the bottom. The hanging pins are located on both sides of the lower mold. The inclination angle of the embedded serrated cutter is consistent with the inclination angle of the groove on the skeleton fixed to the upper mold.

[0007] Furthermore, the hanging pins are located at two 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 toothed cutter. The upper part of the elastic telescopic mechanism is connected to the embedded toothed 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 driving unit and a connecting block, the connecting block is connected to the output end of the second driving unit, the hanging needle is located above the connecting block, and 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 die and the lower die are provided with positioning guide devices.

[0012] On the other hand, a method for laminating a grooved interior frame by pressing includes 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 groove direction, spray glue once on each groove, and then move the glue gun along the direction of the groove arrangement to spray glue again;

[0014] Baking: Put the skeleton into the oven for baking, the baking temperature is 50-120℃, and the drying time is 30s-5min; 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 upward on the lower die of the pressing and laminating device, and hang the hanging hole of the skin on the hanging pin of the lower die. The vacuum mechanism of the lower die adsorbs the skin on the surface of the lower die, and inserts the tooth knife to support the skin at intervals, so that the skin adsorbed 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 process of placing the epidermis, after the epidermis is hung on the hanging needle, the epidermis is pressed along the length direction of the embedded toothed knife.

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

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

[0020] 1. The present invention positions the epidermis on the lower mold by means of a hanging needle, makes the epidermis adhere to the upper surface of the lower mold by means of a vacuum mechanism, and forms a plurality of raised lines on the epidermis adsorbed on the upper surface of the lower mold by means of an embedded toothed knife. Thus, when the skeleton and the epidermis are pressed against the film, the embedded toothed knife can embed the raised lines of the epidermis into the grooves of the skeleton, thereby achieving the coating of the skeleton surface and the epidermis on the grooves;

[0021] 2. The present invention uses an elastic telescopic mechanism and the elastic telescopic mechanism is connected to both ends of the embedded tooth knife, so that when the film is pressed, the embedded tooth knife moves downward under the telescopic effect 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 when the groove is filmed, thereby reducing the product quality;

[0022] 3. The present invention can separate the embedded toothed cutter from the finished coated product and the product from the groove of the lower mold by setting an ejection mechanism, so as to facilitate the removal of the product from the mold and avoid the damage to the product surface caused by the embedded toothed cutter when taking out the product, or the deformation of the product caused by the vacuum mechanism. The present invention has a reasonable design and is easy to use, which is conducive to ensuring the adhesion of the surface of the grooved skeleton and the quality of the coated 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 in conjunction with the accompanying drawings and specific embodiments, but the implementation scope of the present invention is not limited thereto.

[0030] It should be noted that the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer", etc., indicating the orientation or positional relationship, are based on the orientation or positional relationship shown in the drawings, and are only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as limiting the present invention. In addition, the terms "first", "second", and "third" are used for descriptive purposes only, and cannot be understood as indicating or implying relative importance.

[0031] In the description of the present invention, it should be noted that, unless otherwise clearly specified and limited, the terms "installed", "connected", and "connected" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection, or it can be indirectly connected through an intermediate medium, or it can be the internal communication of two components. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0032] like Figure 1-Figure 4 As shown, a device for pressing and laminating a decorative frame with grooves in this embodiment comprises an upper die 1 and a lower die 2, wherein the upper die 1 or / and the lower die 2 are provided with a first driving unit, and preferably the first driving unit is connected to the upper die 1, that is, the first driving unit drives the upper die 1 to move up and down; the upper die 1 is provided with a positioning unit and a fixing unit for fixing the frame, preferably, the positioning unit is a positioning column or a positioning hole matched with a column on the back of the frame, or a positioning block matched with a 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, and after the skin pressing is completed, when the lower die 2 moves upward, it is convenient to separate the frame from the upper die 1;

[0033] The lower mold 2 is provided with a vacuum mechanism, a plurality of embedded tooth knives 3 and hanging needles 4, the number of the embedded tooth knives 3 is consistent with the number of grooves on the surface of the skeleton fixed by the upper mold 1, and the surface of the lower mold 2 is provided with a plurality of air holes, and the vacuum mechanism is connected with the air holes. Preferably, the air holes are located between the two embedded tooth knives 3, and the vacuum mechanism makes the epidermis placed on the lower mold 2 adhere to the surface of the lower mold 2 through the air holes; the embedded tooth knives 3 are 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 tooth knife 3 is a structure with a narrow upper part and a wide lower part, which preferably gradually increases from top to bottom, and is preferably a V-shaped with a small upper part and a large lower part, so that when the embedded tooth knife 3 is pressed and coated, the epidermis can be embedded into the groove of the skeleton, and the inclination angle of the embedded tooth knife 3 is consistent with the inclination angle of the groove on the skeleton fixed by the upper mold 1, and the embedded tooth knife 3 crosses the upper surface of the lower mold 2.

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

[0035] Elastic telescopic mechanisms 5 are arranged on both sides of the lower mold 2, and the elastic telescopic mechanisms 5 are telescopic springs or cylinders. Preferably, the elastic telescopic mechanisms 5 are telescopic springs, and the telescopic springs are sleeved with guide rods. The elastic telescopic mechanisms 5 are located at both ends of the embedded tooth knife 3, and the embedded tooth knife 3 is connected to the upper part of the elastic telescopic mechanisms 5. The elastic telescopic mechanisms 5 are arranged vertically. On the one hand, when the upper mold 1 drives the skeleton to move downward to press the epidermis, the elastic telescopic mechanism 5 drives the embedded tooth knife 3 to move downward, so as to avoid wrinkles on the epidermis when the epidermis is embedded in the groove of the skeleton, especially for skeletons with non-planar surfaces, the quality of epidermis coating during pressure coating can be well guaranteed, and defects such as unevenness and wrinkles can be avoided after epidermis coating; on the other hand, after the epidermis is pressed, the elastic telescopic mechanism 5 can drive the embedded tooth knife 3 to move upward, so as to facilitate the subsequent separation of the embedded tooth knife 3 from the product.

[0036] The lower mold 2 is provided with an ejection mechanism 6, which includes a second drive unit and a connection block 61. The connection block 61 is connected to the output end of the second drive unit. Preferably, the second drive unit is a cylinder. The hanging needle 4 is located above the connection block 61. A limit unit 62 is provided above the connection block 61 to limit the upward movement of the embedded tooth knife 3. After the crimping film is completed, when the product is separated from the lower mold 2, the second drive unit drives the connection block 61 to move downward. When moving downward, the elastic telescopic unit is compressed. Under the limiting action of the limit unit 62, the embedded tooth knife 3 moves downward or quickly moves downward with the connection block 61. Since the surface of the skeleton is in contact with the lower mold 2, the embedded tooth knife 3 can be separated from the groove of the skin-covered skeleton; the second drive unit drives the connection block 61 to move upward, and the connection block 61 drives the embedded tooth knife 3 to move upward synchronously. Under the action of the embedded tooth knife 3, the finished film-covered product is separated from the lower mold 2, that is, the vacuum mechanism in contact with the lower mold 2 adsorbs the film-covered product, which facilitates the removal of the finished film-covered product.

[0037] The hanging needle 4 and / or the connecting block 61 are provided with an adjusting unit (not shown) for adjusting the position of the hanging needle 4. The adjusting 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 adjusting unit, or the adjusting unit is an adjusting screw that can adjust the front and back, left and right position of the hanging needle 4 to adjust the position of the hanging needle 4 and the connecting block 61 to achieve position adjustment of the hanging needle 4 in the horizontal plane; the adjusting 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 as to facilitate the adjustment of the height of the connecting block 61 and the hanging needle 4 in the vertical plane through the connecting rod.

[0038] The upper mold 1 and the lower mold 2 are provided with a positioning guide device 7 for ensuring the clamping accuracy of the upper and lower molds. 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: fix the skeleton face down on the upper mold 1, place the skin on the top of the embedded tooth knife 3, and position it with the hole on the skin, and hang it on the hanging pin 4 of the lower mold 2; the vacuum mechanism of the lower mold 2 makes the skin adsorbed on the surface of the lower mold 2, and forms multiple raised lines on the skin on the lower mold 2 through the embedded tooth knife 3; the upper mold 1 moves downward, so that the skeleton is pressed on the skin laid on the lower mold 2 to achieve the pressed film coating of the skeleton. After the film coating is completed, 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, and the product remains on the upper mold 1; it is also possible to leave the coated skeleton on the lower mold 2, and then separate the product from the embedded tooth knife 3 and the lower mold 2 through the ejection mechanism 6, so as to facilitate the removal of the product.

[0040] A method for pressing and laminating an interior decoration frame with grooves, comprising:

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

[0042] Baking: putting the skeleton into an oven for baking at a temperature of 50-120°C, preferably 85±10°C, to activate the glue, and the drying time is 30s-5min, preferably 2-3min; 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 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 lower die 2, and inserts the tooth knife 3 to support the skin at intervals, so that the skin adsorbed on 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 and laminating device to perform crimping and laminating of the skeleton and the skin. During crimping, the pressure of the crimping and 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 process of placing the skin, if the skin adsorbed on the lower mold 2 has wrinkles, the skin is slightly lifted up and re-adsorbed or manually flattened.

[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 toothed knife 3, which is conducive to the smooth adsorption of the epidermis on the lower mold 2, and is also conducive to the fit of the epidermis suture position with the skeleton groove during pressing.

[0047] Finally, it should be noted that the above embodiments are only used to illustrate the technical solution 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 solution of the present invention can be modified or replaced by equivalents without departing from the essence and scope of the technical solution of the present invention.

Claims

1. A film-pressing device for an interior decoration frame with grooves, characterized in that: It comprises an upper die (1) and a lower die (2), wherein the upper die (1) or / and 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 frame; The lower mold (2) is provided with a vacuum extraction 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 mold (2); the vacuum extraction mechanism is connected to the air holes; the embedded tooth knives (3) are located above the lower mold (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 mold (2); and 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 mold (1).

2. The device for pressing and laminating a grooved interior frame according to claim 1, characterized in that: The hanging needles (4) are located at two ends of the embedded toothed knife (3).

3. The device for pressing and laminating a grooved interior frame according to claim 1, characterized in that: Elastic telescopic mechanisms (5) are provided on both sides of the lower mold (2), and the elastic telescopic mechanisms (5) are located at both ends of the embedded toothed cutter (3). The upper part of the elastic telescopic mechanism (5) is connected to the embedded toothed cutter (3), and the lower part is connected to the lower mold (2).

4. The device for pressing and laminating a grooved interior frame according to claim 1, characterized in that: The lower mold (2) is provided with an ejection mechanism (6), the ejection mechanism comprising a second driving unit and a connecting block (61), the connecting block (61) being connected to the output end of the second driving 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 toothed knife (3) being provided above the connecting block (61).

5. The device for pressing and laminating a grooved interior frame according to claim 4, 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).

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

7. 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 groove direction, spray glue once on each groove, 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 facing downward on the upper mold (1) of the pressing and laminating device; Placing the skin: placing the cut skin with its reverse side facing upward on the lower die (2) of the pressing and laminating device, hanging the hanging hole of the skin on the hanging pin (4) of the lower die (2), the vacuuming mechanism of the lower die (2) adsorbs the skin on the surface of the lower die (2), inserting 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.

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

9. The method for laminating a grooved interior frame according to claim 7, 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 toothed knife (3).

10. The method for laminating a grooved interior frame according to claim 7, characterized in that: During pressing, the pressure of the pressing and laminating device is 0.2-1 MPa.

Images