Precise hot-pressing film laminating equipment for special-shaped plates and film guiding method

Abstract

The invention discloses precise hot-pressing film laminating equipment for a special-shaped plate and a film guiding method, and aims at solving the problem that the thickness of a surface film of an existing special-shaped plate is not uniform. The device comprises a rack, a power system, a guide roller, a bending roller, a first shape righting roller, a second shape righting roller, a first forming roller, a second forming roller, a hot pressing roller and a pressure bearing roller, the first shape righting roller is composed of a core rod and a first shape righting code; the distance between the second shape righting roller and the first shape righting roller is adjustable, and a plurality of second shape righting codes are fixed on the second shape righting roller at equal intervals; a first outer forming ring is arranged on the first forming roller, and first inner forming rings are arranged on the two sides of the first outer forming ring; second inner forming rings attached to the first outer forming rings in a one-to-one correspondence mode are arranged on the second forming roller, and second outer forming rings attached to the first inner forming rings in a one-to-one correspondence mode are further arranged on the second forming roller. The hot-pressing roller is provided with hot-pressing outer rings attached to the second inner forming rings in a one-to-one correspondence mode and further provided with hot-pressing inner rings attached to the second outer forming rings in a one-to-one correspondence mode.

Description

Technical Field

[0001] This invention relates to a hot-pressing laminating equipment for sheet metal, and more specifically, to a precision hot-pressing laminating equipment and film application method for irregularly shaped sheet metal. Background Technology

[0002] In the field of modern decoration and industrial design, decorative panels are a widely used material, and their surface treatment processes play a crucial role in enhancing the overall performance and aesthetics of products. Among these, hot-pressing composite lamination technology, with its unique advantages, has become the preferred method for surface treatment of many decorative panels. This technology involves hot-pressing a layer of a specific functional film onto the surface of the decorative panel, which not only provides effective protection against external environmental erosion, such as preventing scratches, corrosion, and wear during daily use, thus extending the panel's lifespan, but also endows the panel with a rich variety of aesthetic effects, meeting the personalized aesthetic needs of different scenarios, and greatly enhancing the product's added value and market competitiveness.

[0003] For decorative panels with flat surfaces, existing conventional hot-pressing lamination equipment is already quite mature. This equipment can precisely control key parameters such as temperature, pressure, and time during the hot-pressing process, ensuring a uniform and tight bond between the film and the panel surface. During hot pressing, the film spreads smoothly on the panel surface without noticeable wrinkles, bubbles, or stretching deformation, thus guaranteeing that the laminated panel achieves high standards in both protective performance and aesthetic quality. The film thickness remains consistent across the entire panel surface, providing uniform protection while also ensuring that the surface patterns are fully and clearly displayed, meeting aesthetic requirements.

[0004] However, with continuous innovation in design concepts and the increasing demand from consumers for product personalization, more and more decorative panel surfaces are no longer limited to traditional flat structures, but instead present complex and diverse forms. Among them, non-planar decorative panel structures with several grooves distributed along the length direction are gradually becoming a common design form. This type of decorative panel with grooves not only meets specific functional requirements, but also adds a unique element to the aesthetics of the panel.

[0005] However, existing conventional hot-press lamination equipment exhibits numerous insurmountable problems when dealing with non-planar decorative panels. Due to the undulating grooved structure on the panel surface, conventional equipment simply adapts the shape of the hot-press rollers to these grooves. This results in significant film deformation during the hot-pressing process, particularly in the undulating areas of the panel. Although certain process adjustments can eventually achieve film adhesion to the panel surface, this adhesion comes at the cost of film uniformity. Significant differences in film thickness appear in different areas, especially where the film is stretched, resulting in noticeably thinner film. This uneven thickness severely affects the film's protective effect on the decorative panel; in areas with thinner film, the panel is more susceptible to damage from external factors, thus reducing the overall reliability and lifespan of the product.

[0006] Meanwhile, the stretching and deformation of the membrane also leads to another serious problem: the pattern on the membrane surface becomes distorted. The originally beautifully designed and regular patterns become twisted and distorted under stretching, greatly damaging the overall aesthetics of the panel and failing to meet consumers' demands for a high-quality appearance. This not only affects the product's market sales but also limits the application scope of non-planar panels in the design field.

[0007] In summary, existing conventional hot-pressing lamination equipment suffers from technical problems such as uneven film thickness, reduced protective effect, and deformation of patterns affecting aesthetics when processing non-planar decorative panels with grooves distributed along the length direction. There is an urgent need for a new hot-pressing lamination technology and equipment to solve these problems and meet the market demand for high-quality lamination of non-planar decorative panels. Summary of the Invention

[0008] This invention provides a precision hot-pressing lamination device and a film-drawing method for irregularly shaped sheets; it solves the problem of uneven film thickness caused by conventional hot-pressing lamination equipment when laminating irregularly shaped sheets.

[0009] The above-mentioned technical objective of the present invention is achieved through the following technical solution: a precision hot-pressing and laminating equipment for irregularly shaped sheets, comprising: a frame, a power system, guide rollers, bending rollers, a first straightening roller, a second straightening roller, a first forming roller, a second forming roller, a hot-pressing roller, and a pressure roller. All rollers are horizontally rotatably mounted on the frame. The power system can drive the remaining rollers, except for the guide rollers, to rotate at a uniform speed, ensuring that the linear velocity of each roller surface is consistent. The first straightening roller is composed of a core rod and a plurality of cylindrical first straightening brackets movably sleeved on the core rod. The first straightening brackets are provided with locking screws to control whether they are fixed to the core rod. The second straightening roller and the first straightening roller... The spacing between them is adjustable. Several second shaping codes are fixed at equal intervals on the second shaping roller, and in the direction perpendicular to the axial direction, the second shaping codes are staggered from the first shaping codes. The first forming roller has a first outer forming ring that is directly aligned with each of the first shaping codes, and first inner forming rings are provided on both sides of the first outer forming ring. The second forming roller has a second inner forming ring that corresponds to and is aligned with each of the first outer forming rings, and also has a second outer forming ring that corresponds to and is aligned with each of the first inner forming rings. The hot pressing roller has a hot pressing outer ring that corresponds to and is aligned with each of the second inner forming rings, and also has a hot pressing inner ring that corresponds to and is aligned with each of the second outer forming rings. The frame and power system in this invention are all existing conventional technologies, therefore their specific configuration schemes will not be described in detail here.

[0010] After the film exits the unwinding roller, it sequentially passes through guide rollers, bending rollers, first and second straightening rollers, first forming rollers, second forming rollers, and hot pressing rollers. Several guide rollers guide the film's direction. The first and second straightening rollers pre-shape the film using first and second straightening codes, which are staggered to create a wave-like distribution on the film. This wave pattern matches the surface grooves of the irregularly shaped sheet. Since the film does not undergo significant stretching during the straightening process, its projected width narrows. Because the straightening area is parallel to the guide rollers, the narrowing towards the center causes more stretching on the outer edges. To avoid this stretching, a bending roller is added. After passing through the bending roller, the closer the film is to the center, the more pronounced the path lengthening effect due to bending, thus mitigating the stretching effect caused by the narrowing towards the center. After being shaped, the film is then wound into the first forming roller and the second forming roller, which further corrects and shapes it. Finally, hot-pressing and lamination are completed at the hot-pressing roller and the bearing roller. This invention achieves precise hot-pressing and lamination of non-planar decorative panels with grooves distributed along the length direction.

[0011] Furthermore, the number of the first orthotic codes is odd, with the middle first orthotic code integrally disposed in the middle of the core rod. Since the position of the first orthotic codes can be movable, but it is necessary to ensure that all the first orthotic codes are centered, the middle first orthotic code is fixed as a reference.

[0012] The present invention also provides a film feeding method for a hot-pressing coating equipment, wherein in the first step, the distance between the second straightening roller and the first straightening roller is adjusted so that the two are separated; Step 2: Loosen the locking screws on the first orthotic bracket, adjust the spacing between the first orthotic brackets so that all the first orthotic brackets are in a wide-spaced state, and then tighten the locking screws again. Step 3: After the film is pulled out from the unwinding roller, it is passed around the guide roller and then laid flat on the first shaping roller; Step 4: Loosen the locking screws on the first orthotic code again to reduce the spacing between the first orthotic codes, so that all the first orthotic codes are in a narrow spacing state, and then tighten the locking screws again. At this time, the membrane between the first orthotic codes is in a relaxed state. Step 5: Adjust the distance between the second orthopedic roller and the first orthopedic roller so that they are close together. The pressure of the second orthopedic roller will tighten the loose film again. Step 6: Slowly pull the film to pass it sequentially around the first forming roller, the second forming roller, and the hot press roller to complete the film pulling process.

[0013] The equipment of this invention not only solves the problems of uneven film thickness, reduced protective effect, and deformation of patterns affecting aesthetics when processing non-planar decorative panels by existing conventional hot-pressing lamination equipment, but also meets the market demand for high-quality lamination of non-planar decorative panels, improves product reliability and overall aesthetics, expands the application scope of non-planar decorative panels in the design field, and has good market prospects and practical value.

[0014] The membrane-drawing method of the present invention can significantly reduce the difficulty of membrane drawing and improve the accuracy of membrane orientation.

[0015] In summary, the present invention has the following beneficial effects: 1. During the straightening process, the straightening codes on the first and second straightening rollers are staggered to make the film have a waveform that is consistent with the groove distribution on the surface of the irregular plate, and avoids obvious stretching deformation, thus ensuring the uniformity of film thickness. 2. The added bending roller effectively neutralizes the stretching effect on the outer film when the film narrows towards the center, further improving the coating quality; 3. The spacing of the first straightening code is adjustable, and the position of the second straightening roller is adjustable, which can greatly reduce the difficulty of film drawing. Attached Figure Description

[0016] Figure 1This is a schematic diagram of the overall structure of the present invention; Figure 2 This is a schematic diagram of the structure of all rollers in this invention; Figure 3 This is a schematic diagram of the structure when the first and second straightening rollers are close to each other; Figure 4 This is a schematic diagram of the structure when the first and second straightening rollers are separated from each other; Figure 5 This is a schematic diagram of the structure of the first forming roller and the second forming roller; Figure 6 This is a schematic diagram of the structure of the hot press roller and the bearing roller; Figure 7 This is a stress distribution diagram of the membrane flowing from the guide roller to the shaping roller; Figure 8 This is a schematic diagram of the structure of the second straightening roller and the swing arm; Figure 9 This is a structural schematic diagram of an irregularly shaped sheet material. Detailed Implementation

[0017] To enable those skilled in the art to better understand the technical solutions of the present invention, the present invention will be further described in detail below with reference to the accompanying drawings and specific embodiments. It should be noted that, in the absence of conflict, the embodiments and features in the embodiments of this application can be combined with each other.

[0018] In the description of this invention, it should be noted that the terms "upper", "lower", "inner", "outer", "top / bottom", etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing this invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limiting this invention.

[0019] In the description of this invention, it should be noted that, unless otherwise explicitly specified and limited, the terms "installed," "equipped with," "set up / connected," "connected," etc., should be interpreted broadly. For example, "connection" 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 an indirect connection through an intermediate medium; it can be a connection within two components. Those skilled in the art can understand the specific meaning of the above terms in this invention based on the specific circumstances.

[0020] The present invention will now be described in detail with reference to the accompanying drawings.

[0021] Example 1: See Figure 1 , Figure 2 and Figure 9A precision hot-pressing and laminating device for irregularly shaped sheets includes: a frame, a power system, guide rollers 10, bending rollers 20, first straightening rollers 30, second straightening rollers 40, first forming rollers 50, second forming rollers 60, hot-pressing rollers 70, and pressure rollers 80. All rollers are horizontally rotatably mounted on the frame. The power system drives the remaining rollers (except the guide rollers) to rotate at a uniform speed, ensuring that the surface linear velocity of each roller is consistent. The guide rollers are driven rollers. The first straightening roller consists of a core rod 31 and three cylindrical first straightening clips 32 movably sleeved on the core rod. The first straightening code is equipped with a locking screw 33 to control whether it is fixed to the core rod; the distance between the second straightening roller and the first straightening roller is adjustable, and four second straightening codes 41 are fixed at equal intervals on the second straightening roller. In the direction perpendicular to the axial direction, the second straightening codes and the first straightening codes are staggered; the first forming roller is equipped with a first outer forming ring 51 that is directly aligned and fitted with the first straightening codes, and first inner forming rings 52 are provided on both sides of the first outer forming ring; the second forming roller is equipped with a second inner forming ring 61 that is correspondingly fitted with the first outer forming ring (see...). Figure 5 The hot press roller is also provided with a second outer forming ring 62 that corresponds to and fits one-to-one with the first inner forming ring; the hot press roller is provided with a hot press outer ring 71 that corresponds to and fits one-to-one with the second inner forming ring, and a hot press inner ring 72 that corresponds to and fits one-to-one with the second outer forming ring (see...). Figure 6 The frame and power system in this embodiment are all existing conventional technologies, so their specific configuration schemes will not be described in detail here.

[0022] See Figure 3 Specifically, the first orthotic code, located in the middle, is integrally set in the middle of the core rod. Since the position of the first orthotic code can be moved, but it is necessary to ensure that all the first orthotic codes are centered, the middle first orthotic code is fixed as a reference.

[0023] See Figure 3 and Figure 4 Specifically, apart from the first orthotic code located in the middle, the remaining first orthotic codes are also equipped with a spacing control sleeve 34. Limit rings 35 are fixed to both ends of the core rod, and locking screws are located on the spacing control sleeves. When the two movable first orthotic codes move closer to the middle first orthotic code, the spacing control sleeve abuts against the middle first orthotic code, at which point the spacing between the first orthotic codes is precisely fixed, resulting in a narrow spacing. Conversely, when the two movable first orthotic codes move away from the middle first orthotic code, they eventually abut against the limit rings, at which point the spacing between the first orthotic codes is again precisely fixed, resulting in a wide spacing. Therefore, this embodiment, through the above technical solution, can accurately position two different spacing arrangements.

[0024] See Figure 8The second straightening roller has swing arms 90 rotatably mounted at both ends. The other ends of the two swing arms are coaxially rotatably connected to the frame. The frame has two position holes 91, and the swing arms have insertion holes 92 and pins 93 movably mounted in the insertion holes. When the pins are inserted into different position holes, the second straightening roller is in a state of being close to or separated from the first straightening roller.

[0025] After film 1 is output from the unwinding roller, it sequentially passes through guide rollers, bending rollers, first and second straightening rollers, first forming rollers, second forming rollers, and hot press rollers. Several guide rollers are used to guide the film's direction. The first and second straightening rollers are used to pre-shape the film, specifically through first and second straightening codes. The two codes are staggered, resulting in a wave-like distribution of the film. This wave shape matches the surface groove distribution of the irregularly shaped sheet material. The film does not undergo significant stretching deformation during the straightening process; therefore, the projected width of the film narrows during straightening. Since the straightening area is parallel to the guide rollers, the narrowing of the film towards the center results in more pronounced stretching on the outer edges of the film (see...). Figure 7 To avoid stretching, this embodiment adds a bending roller. After the film passes through the bending roller, the closer the film is to the center, the more significant the path lengthening effect caused by bending becomes. This neutralizes the stretching effect on the outer parts of the film caused by the film narrowing towards the center. After shaping, the film is then wound into the first forming roller and the second forming roller, further achieving shaping and setting effects. Finally, hot-pressing and lamination are completed at the hot-pressing roller and the pressure roller. This embodiment achieves precise hot-pressing and lamination of non-planar decorative panels with grooves distributed along the length direction.

[0026] This embodiment also discloses a film-drawing method for a hot-pressing coating equipment. Step one: Adjust the distance between the second straightening roller and the first straightening roller so that the two are separated. Step 2: Loosen the locking screws on the first orthotic bracket, adjust the spacing between the first orthotic brackets so that all the first orthotic brackets are in a wide-spaced state, and then tighten the locking screws again. Step 3: After the film is pulled out from the unwinding roller, it is passed around the guide roller and then laid flat on the first shaping roller; Step 4: Loosen the locking screws on the first orthotic code again to reduce the spacing between the first orthotic codes, so that all the first orthotic codes are in a narrow spacing state, and then tighten the locking screws again. At this time, the membrane between the first orthotic codes is in a relaxed state. Step 5: Adjust the distance between the second orthopedic roller and the first orthopedic roller so that they are close together. The pressure of the second orthopedic roller will tighten the loose film again. Step 6: Slowly pull the film to pass it sequentially around the first forming roller, the second forming roller, and the hot press roller to complete the film pulling process.

[0027] The above description is merely a preferred embodiment of the present invention. The scope of protection of the present invention is not limited to the above embodiments. All technical solutions falling within the scope of the present invention's concept are within the scope of protection of the present invention. It should be noted that for those skilled in the art, any improvements and modifications made without departing from the principles of the present invention should also be considered within the scope of protection of the present invention.

Claims

1. A precision hot lamination equipment for profiled sheet material, characterized in that, The application relates to a hot-pressing film covering equipment, which comprises a rack, a power system, guide rollers, bending rollers, first straightening rollers, second straightening rollers, first forming rollers, second forming rollers, hot-pressing rollers and pressure-bearing rollers, all of which are horizontally arranged on the rack; the first straightening rollers are composed of a core rod and a plurality of cylindrical first straightening codes movably sleeved on the core rod, and locking screws are arranged on the first straightening codes to control whether the first straightening codes are fixed on the core rod; the distance between the second straightening rollers and the first straightening rollers is adjustable, a plurality of second straightening codes are fixed on the second straightening rollers at equal intervals, and the second straightening codes are staggered with the first straightening codes in the direction perpendicular to the axial direction; the first forming rollers are provided with first outer forming rings which are in one-to-one correspondence with the first straightening codes and are in close contact with the first straightening codes; the two sides of the first outer forming rings are provided with first inner forming rings; the second forming rollers are provided with second inner forming rings which are in one-to-one correspondence with the first outer forming rings and are in close contact with the first outer forming rings, and are also provided with second outer forming rings which are in one-to-one correspondence with the first inner forming rings and are in close contact with the first inner forming rings; the hot-pressing rollers are provided with hot-pressing outer rings which are in one-to-one correspondence with the second inner forming rings and are in close contact with the second inner forming rings, and are also provided with hot-pressing inner rings which are in one-to-one correspondence with the second outer forming rings and are in close contact with the second outer forming rings. The number of the first straightening codes is odd, and the middle first straightening code is integrally arranged on the middle part of the core rod.

2. The precision hot lamination apparatus for profiled sheet material according to claim 1, characterized in that: In addition to the middle first straightening code, the rest of the first straightening codes are also provided with spacing control sleeves, the two ends of the core rod are fixed with limiting rings, and the locking screws are arranged on the spacing control sleeves.

3. The precision hot lamination apparatus for profiled sheet material according to claim 2, characterized in that: The two ends of the second straightening rollers are respectively provided with swing arms which are coaxially and rotatably connected to the rack, the rack is provided with two gear holes, the swing arms are provided with insertion holes and insertion pins movably arranged in the insertion holes; when the insertion pins are inserted into different gear holes, the second straightening rollers are in close contact with or separated from the first straightening rollers.

4. The precision hot lamination apparatus for profiled sheet material of claim 1, wherein:

5. A film leading method of a hot-pressing film covering equipment, characterized in that: Step one, the distance between the second straightening rollers and the first straightening rollers is adjusted so that the two are separated; Step two, the locking screws on the first straightening codes are loosened, the distance between the first straightening codes is adjusted, all the first straightening codes are in a wide-distance state, and the locking screws are tightened again; Step three, after the film is pulled out from the unwinding roller, the film is wound around the guide rollers and then is laid flat on the first straightening rollers; Step four, the locking screws on the first straightening codes are loosened again, the distance between the first straightening codes is reduced, all the first straightening codes are in a narrow-distance state, and the locking screws are tightened again, at this time, the film between the first straightening codes is in a relaxed state; Step five, the distance between the second straightening rollers and the first straightening rollers is adjusted so that the two are close to each other, and the second straightening codes are pressed to make the film in the relaxed state be tight again; Step six, the film is slowly pulled to be wound around the first forming rollers, the second forming rollers and the hot-pressing rollers in sequence, and the film leading is completed. ​

Images