A high-efficiency hot pressing forming device and forming process for cedar homogeneous board

Abstract

The present invention relates to the technical field of hot pressing forming devices, and discloses an efficient hot pressing forming device and forming process for a cedar homogeneous board, comprising a frame, two hydraulic cylinders being mounted on the frame, the output ends of the two hydraulic cylinders being fixedly connected to a pressure plate, the bottom surface of the pressure plate being fixedly mounted with an upper die, and the frame being mounted with a lower die; a calendering assembly for rolling the plate flat; a positioning assembly for centering the plate; and a sealing assembly for sealing the gap between the upper die and the lower die during hot pressing. By setting the calendering assembly, the two pressure rollers roll the surface of the plate from the middle to both sides before the upper die contacts the plate, thereby flattening the locally raised and bulged areas, so that when the upper die contacts the plate, the surface of the plate can maintain a certain degree of flatness, ensuring uniform force during hot pressing.

Description

Technical Field

[0001] The present invention relates to the technical field of hot pressing forming devices, and in particular to a high-efficiency hot pressing forming device and a forming process for a cedar homogeneous board. Background Art

[0002] Fir homogeneous board is the product of the combination of natural wood and modern technology. It not only retains the texture and environmental friendliness of solid wood, but also solves the defects of traditional wood through the homogenization process. It is suitable for mid-to-high-end scenes with high requirements for stability and aesthetics. With the popularization of formaldehyde-free glue technology, it has broad application prospects in the fields of customized furniture and environmentally friendly decoration. Since curved-shaped furniture is more popular in customized furniture now, some Fir homogeneous boards need to be hot-pressed again. The Fir homogeneous boards are hot-pressed into curved boards using curved molds to meet the processing needs of curved customized furniture.

[0003] Chinese patent CN219381335U discloses "a hot pressing forming machine for plate production", which includes a hot pressing machine body, wherein both sides of the upper outer surface of the hot pressing machine body are fixedly connected with a cylinder, the cylinder passes through the upper outer surface of the inner wall of the hot pressing machine body, and the middle part of the upper outer surface of the hot pressing machine body is detachably connected with a motor, the lower end of the cylinder is slidably connected with a guide rod, the lower end outer surface of the guide rod is provided with a heating plate, the lower end outer surface of the inner wall of the hot pressing machine body is fixedly connected with a placing plate, the inner wall of the placing plate is provided with a movable cavity, and a cooling component is provided inside the placing plate. The hot pressing forming machine for plate production described in this patent can effectively cool down the finished product after hot pressing through the provided cooling component, improve work efficiency, and reduce the risk of burns for workers when taking the finished product. It can also facilitate the disassembly and installation of the heating plate, saving replacement time and improving efficiency.

[0004] However, the existing technology has the following problems:

[0005] In the prior art, when using an arc-shaped mold to perform hot pressing forming on a sheet, the sheet needs to be coated with glue and stacked before hot pressing, and multiple layers of thin sheets are stacked into a sheet. During the coating and stacking process, the sheet may be locally bulged on the surface due to deformation of the sheet, accumulation of adhesive, etc., resulting in uneven surface force during hot pressing, which affects the appearance quality after forming. Summary of the Invention

[0006] The purpose of the present invention is to provide an efficient hot pressing forming device and forming process for cedar homogeneous boards in order to solve the above problems, in order to overcome the defect of the existing technology that local bulging may occur during the process of gluing and laminating the boards, resulting in uneven surface force on the boards during hot pressing. Please see the following for details.

[0007] To achieve the above objectives, the present invention provides the following technical solutions:

[0008] The cam is provided with a plurality of hydraulic cylinders, the output ends of the two hydraulic cylinders are fixedly connected to the pressure plates, the bottom surface of the pressure plates is fixedly installed with an upper mold, and the lower mold is installed on the frame; it also includes a calendering assembly for rolling the plate flat; a positioning assembly for centering the plate; a sealing assembly for sealing the gap between the upper mold and the lower mold during hot pressing; the calendering assembly includes two rotating shafts, the outer walls of the two rotating shafts are respectively fixedly connected to the pressure rollers, the two ends of the rotating shafts are respectively rotatably connected to the connecting blocks, the connecting blocks are fixedly connected to the sliding shaft and the pulley seat, the outer walls of the two ends of the lower mold are respectively fixedly connected to two guide blocks, and the four guide blocks are respectively fixedly installed with elastic telescopic rods, the two elastic telescopic rods located at the same end of the lower mold are fixedly connected with slot rods, and the outer walls of the two ends of the upper mold are respectively fixedly installed with slide rails.

[0009] Preferably, four guide rods are fixedly connected to the bottom surface of the pressure plate, and the four guide rods are respectively located at the four corners of the bottom surface of the pressure plate. Guide holes are respectively provided on the four guide blocks, and the four guide rods are respectively slidably connected to the guide holes of the four guide blocks. High-frequency heating devices are respectively provided in the upper mold and the lower mold.

[0010] Preferably, the two pressure rollers are located below the upper mold, the two pressure rollers are mirror-imaged, a straight groove is provided on the slot rod, the two sliding shafts on the connecting blocks at both ends of the rotating shaft are respectively slidably connected to the straight grooves of the two slot rods, and the two pulley seats on the connecting blocks at both ends of the rotating shaft are respectively slidably connected to the two slide rails through a pulley set.

[0011] Preferably, a toothed disc is fixedly connected to the outer wall of one end of the rotating shaft, and a group of short shafts are fixedly installed on the outer walls of both ends of the upper mold, and the two toothed discs are respectively engaged with the two groups of short shafts.

[0012] Preferably, the positioning assembly includes two sliding rods, the bottoms of the two sliding rods are fixedly connected to two sliders, four sliding grooves are provided on the lower mold, the four sliders are slidably installed in the four sliding grooves of the lower mold, and a positioning plate is slidably connected to the sliding rod, and the two positioning plates are mirror-imaged.

[0013] Preferably, both ends of the sliding rod are fixedly connected with a protruding rod, the end of the protruding rod away from the sliding rod is fixedly connected with a shift shaft, the outer walls of the four guide rods are fixedly connected with a slot plate, the slot plate is provided with an oblique groove, and the four shift shafts are respectively slidably connected to the oblique grooves on the four slot plates.

[0014] Preferably, two nut blocks are fixedly connected to the slide rod, two screw rods are rotatably connected to the positioning plate, and the four screw rods are respectively threadedly connected to the four nut blocks.

[0015] Preferably, the sealing assembly includes a sealing frame, two mounting grooves are provided on the lower mold, the sealing frame is vertically slidably connected to the two mounting grooves of the lower mold, and a slope block is fixedly connected to the slider. The four slope blocks are in sliding contact with the bottom outer wall of the sealing frame during movement, and the sealing frame is in contact with the bottom edge of the upper mold during movement.

[0016] Preferably, the sealing frame is hollow, and a plurality of air holes are opened on the inner side of the sealing frame. Four air bags are fixedly mounted on the lower mold, and the four air bags are respectively located at the four corners of the top surface of the lower mold. The pressure plate squeezes the four air bags during movement, and the four air bags are respectively fixedly connected with air tubes, and the ends of the four air tubes away from the air bags are connected to the sealing frame.

[0017] A high-efficiency hot-pressing forming process for a cedar homogeneous board comprises the following steps:

[0018] Step 1: Raw material preparation and pretreatment: Use a high-precision band saw to cut the logs into thin boards of uniform specifications, and use grinding equipment to finely grind the surface of the thin boards to ensure that the thin boards reach the best pre-treated state;

[0019] Step 2: Gluing: Based on the characteristics of the cedar material and the requirements of the finished product, the adhesive composition and viscosity are precisely adjusted. An automatic gluing device is used to achieve quantitative and uniform spraying of the adhesive. After gluing is completed, the adhesive is quickly transported to the hot pressing mechanism.

[0020] Step 3: Lamination: stack the sheets layer by layer according to the design order to form a complete sheet. Pre-press the sheet to allow the adhesive to initially solidify and fix the sheet shape.

[0021] Step 4: Hot pressing: convey the sheet to the lower die, start the high-frequency heating device in the upper and lower dies, and after the upper and lower dies are preheated, the upper die moves down to hot press the sheet. After the sheet is compacted, it enters the pressure holding stage;

[0022] Step 5: Demolding. After the hot pressing is completed, the upper mold is lifted and the formed curved sheet is removed. The curved sheet is then surface treated and quality inspected.

[0023] The beneficial effects are:

[0024] 1. The high-efficiency hot-pressing forming device for cedar homogeneous board, through the setting of the calendering component, enables the two pressure rollers to roll the surface of the board from the middle to both sides before the upper mold contacts the board, thereby flattening the locally raised and bulged parts, so that the board surface can maintain a certain flatness when the upper mold contacts the board, ensuring uniform force during hot pressing, and the adhesive in the board can be squeezed evenly by rolling, avoiding bulging caused by excessive glue in local areas; through the cooperation of two toothed discs and two sets of short shafts, the two pressure rollers can also rotate when the board surface moves to both sides, thereby increasing the contact area with the board surface, so that the two pressure rollers use their surfaces to continuously rub the board surface, so that the board surface forms a tensioning force to both sides, making the board surface smoother, and avoiding wrinkles in the center of the bent top surface of the board when the board is bent by the downward pressure of the upper mold, thereby affecting the appearance quality.

[0025] 2. The high-efficiency hot-pressing forming device for cedar homogeneous boards uses the positioning assembly to enable the two positioning plates to position the boards. As the boards deform, the two positioning plates can converge synchronously to continuously maintain the centering effect of the boards, avoiding the boards from being skewed during placement and hot pressing. The four screws allow the staff to adjust the distance between the two positioning plates by turning the four screws, thereby matching boards of different widths.

[0026] 3. The high-efficiency hot-pressing forming device for cedar homogeneous boards, through the setting of the sealing component, enables the sealing frame to move up a certain distance when the upper and lower molds press the board, thereby sealing the gap formed between the upper and lower molds, thereby achieving a certain thermal insulation effect, preventing the gap between the upper and lower molds from continuously emitting heat during hot pressing, thereby increasing the energy consumption of the high-frequency heating device, and also causing the ambient temperature around the frame to rise, causing discomfort to the operators; through the setting of four air bags, after the sealing frame moves up, the air in the sealing frame is injected into the gap between the upper and lower molds through multiple air holes, thereby improving the permeability of the adhesive and further improving the overall stability of the board. BRIEF DESCRIPTION OF THE DRAWINGS

[0027] In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the following briefly introduces the drawings required for use in the embodiments or the description of the prior art. Obviously, the drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying any creative work.

[0028] Figure 1 It is a schematic diagram of the overall structure of the present invention;

[0029] Figure 2 It is a schematic diagram of the guide rod structure of the present invention;

[0030] Figure 3 It is a schematic structural diagram of the calendering assembly of the present invention;

[0031] Figure 4 It is a schematic diagram of the connection block structure of the present invention;

[0032] Figure 5 It is a schematic diagram of the toothed disc structure of the present invention;

[0033] Figure 6 It is a schematic structural diagram of the positioning assembly of the present invention;

[0034] Figure 7 It is a schematic structural diagram of the positioning plate of the present invention;

[0035] Figure 8 It is a schematic structural diagram of the sealing assembly of the present invention;

[0036] Figure 9 It is an exploded schematic diagram of the sealing frame and the lower mold of the present invention;

[0037] Figure 10 It is a schematic structural diagram of the sealing frame of the present invention;

[0038] Figure 11 It is a schematic diagram of the structure of the ramp block of the present invention;

[0039] Figure 12 It is a schematic diagram of the airbag structure of the present invention;

[0040] Figure 13 It is a schematic diagram of the pore structure of the present invention.

[0041] The accompanying drawings are marked as follows: 1. Frame; 2. Press plate; 3. Upper mold; 4. Lower mold; 5. Calendering assembly; 51. Rotating shaft; 52. Press roller; 53. Connecting block; 54. Sliding shaft; 55. Elastic telescopic rod; 56. Groove rod; 57. Pulley seat; 58. Slide rail; 59. Toothed plate; 510. Short shaft; 6. Positioning assembly; 61. Sliding block; 62. Sliding rod; 63. Positioning plate; 64. Protruding rod; 65. Dial shaft; 66. Groove plate; 67. Nut block; 68. Screw; 7. Sealing assembly; 71. Sealing frame; 72. Inclined block; 73. Air hole; 74. Air bag; 75. Air pipe; 8. Guide rod; 9. Guide block; 10. Hydraulic cylinder. DETAILED DESCRIPTION

[0042] To make the objectives, technical solutions, and advantages of the present invention more clear, the technical solutions of the present invention will be described in detail below. Obviously, the embodiments described are only some embodiments of the present invention, not all embodiments. Based on the embodiments of the present invention, all other implementations obtained by ordinary technicians in this field without making any creative work are within the scope of protection of the present invention.

[0043] Example 1

[0044] See also Figure 1 - Figure 2 A high-efficiency hot pressing forming device for a homogeneous cedar board includes a frame 1, on which two hydraulic cylinders 10 are installed. The output ends of the two hydraulic cylinders 10 are fixedly connected to a pressing plate 2. The hydraulic cylinders 10 on the frame 1 can drive the pressing plate 2 to move up or down. An upper mold 3 is fixedly installed on the bottom surface of the pressing plate 2, and a lower mold 4 is installed on the frame 1. High-frequency heating devices are respectively provided in the upper mold 3 and the lower mold 4. The high-frequency heating device is a prior art, and its specific structure and working principle are not described here. After the high-frequency heating device is started, the contact surface of the upper mold 3 and the lower mold 4 with the plate can be heated to a set temperature, thereby realizing hot pressing operation.

[0045] For further information, see Figure 1 - Figure 4 , also includes a calendering assembly 5 for rolling the plate flat; the calendering assembly 5 includes two rotating shafts 51, the outer walls of the two rotating shafts 51 are respectively fixedly connected with pressure rollers 52, the two ends of the rotating shafts 51 are respectively rotatably connected with connecting blocks 53, the connecting blocks 53 are fixedly connected with a sliding shaft 54 ​​and a pulley seat 57, the outer walls of the two ends of the lower mold 4 are respectively fixedly connected with two guide blocks 9, the four guide blocks 9 are respectively fixedly installed with elastic telescopic rods 55, the two elastic telescopic rods 55 located at the same end of the lower mold 4 are fixedly connected with a groove rod 56, the outer walls of the two ends of the upper mold 3 are respectively fixedly installed with slide rails 58, the upper mold 3 and the lower mold 4 are respectively fixedly installed with slide rails 58. The contact surface between the mold 4 and the plate is arc-shaped. The shape of the slide rail 58 is similar to the bottom edge of the upper mold 3. The two pressure rollers 52 are both located below the upper mold 3. The two pressure rollers 52 are mirror-imaged. A straight groove is provided on the groove rod 56. The two slide shafts 54 on the connecting blocks 53 at both ends of the rotating shaft 51 are respectively slidably connected to the straight grooves of the two groove rods 56. The two pulley seats 57 on the connecting blocks 53 at both ends of the rotating shaft 51 are respectively slidably connected to the two slide rails 58 through pulley blocks. When the pulley seat 57 on the connecting block 53 slides on the slide rail 58, the slide shaft 54 ​​on the connecting block 53 also slides in the straight groove of the groove rod 56 (as shown in FIG. Figure 4As shown in FIG, the four connecting blocks 53 are able to drive the two rotating shafts 51 to move to both sides along the arc-shaped bottom edge of the upper mold 3. Therefore, after the two pressing rollers 52 move downward and apply a certain pressure to the plate, they can stop moving downward and then move to both sides as the upper mold 3 moves downward, so that the two pressing rollers 52 roll the surface of the plate from the middle to both sides, thereby flattening the locally raised and bulged parts, so that when the upper mold 3 contacts the plate, the surface of the plate can maintain a certain flatness, ensuring uniform force during hot pressing.

[0046] For further information, see Figure 1 - Figure 2 Four guide rods 8 are fixedly connected to the bottom surface of the pressing plate 2. The four guide rods 8 are respectively located at the four corners of the bottom surface of the pressing plate 2. Guide holes are respectively provided on the four guide blocks 9. The four guide rods 8 are respectively slidably connected with the guide holes of the four guide blocks 9. When the pressing plate 2 moves up and down, the four guide rods 8 on the pressing plate 2 slide in the guide holes of the four guide blocks 9 respectively. The four guide blocks 9 play a limiting role on the four guide rods 8, so that the four guide rods 8 increase the stability of the pressing plate 2 when it moves up and down through the cooperation with the four guide blocks 9, thereby avoiding skewness and displacement of the upper mold 3.

[0047] Further, see Figure 4 - Figure 5 , one end outer wall of the rotating shaft 51 is fixedly connected with a toothed disc 59, and the outer walls of both ends of the upper mold 3 are respectively fixedly installed with a group of short shafts 510, and the two toothed discs 59 are respectively engaged with the two groups of short shafts 510. The toothed disc 59 can be regarded as a sprocket, and a group of short shafts 510 can be regarded as multiple core shafts on a chain. Therefore, when the toothed disc 59 moves with the rotating shaft 51, it can rotate through the meshing action of a group of short shafts 510, so that the two rotating shafts 51 can also use the two toothed discs 59 to drive the two pressure rollers 52 to rotate while moving (such as Figure 5 As shown in the figure, the two pressing rollers 52 can increase the contact area with the surface of the plate by rotating, so that the two pressing rollers 52 can continuously rub the surface of the plate with their surfaces, so that the surface of the plate forms a tensioning force toward both sides, making the surface of the plate smoother. By stretching the surface of the plate from the middle to both sides in advance, it can be avoided that when the plate is bent by the downward pressure of the upper mold 3, wrinkles will be generated in the central part of the bent top surface of the plate, thereby affecting the appearance quality.

[0048] Also, see Figure 1 、 Figure 6 - Figure 7 , positioning assembly 6, for centering the plate; positioning assembly 6 includes two slide rods 62, the bottom of the two slide rods 62 are fixedly connected to two sliders 61 (such as Figure 7As shown), four slide grooves are provided on the lower mold 4, and four sliders 61 are slidably installed in the four slide grooves of the lower mold 4 respectively. A positioning plate 63 is slidably connected to the slide rod 62. The two positioning plates 63 are mirror-imaged. When placing the plate, the plate is placed between the two positioning plates 63 so that the two positioning plates 63 are close to both sides of the plate, which plays a role in positioning the plate and avoids the plate from being placed crookedly and affecting the hot pressing operation.

[0049] In addition, see Figure 6 - Figure 7 When the plate 66 moves downward, the inclined groove can be used to drive the dial shaft 65 to move in the direction close to the bending center of the lower mold 4. When the four slot plates 66 move downward, the cooperation of the four dial shafts 65 and the four protruding rods 64 can be used to drive the two slide bars 62 on the lower mold 4 to move in the direction close to each other. When the slide bar 62 moves, it drives the positioning plate 63 to move synchronously. When the plate is pressed down by the upper mold 3, the two sides of the plate will gradually gather towards the middle, and the two positioning plates 63 can move synchronously towards the middle with the two sides of the plate, so that the two positioning plates 63 can continue to center the plate. When the plate is about to be completely bent, the plate enters the gap between the arc-shaped parts of the upper mold 3 and the lower mold 4, and the two sides of the plate are separated from the two positioning plates 63.

[0050] It is worth noting that see Figure 7 、 Figure 11 Two nut blocks 67 are fixedly connected to the sliding rod 62, and two screws 68 are rotatably connected to the positioning plate 63. The four screws 68 are respectively threadedly connected to the four nut blocks 67. The staff can rotate the two screws 68 above the sliding rod 62. When the screws 68 are rotated, the distance between the positioning plate 63 and the nut block 67 can be adjusted by using the threaded connection relationship, thereby achieving the effect of adjusting the distance between the two positioning plates 63 by rotating the four screws 68, thereby matching plates of different widths.

[0051] It is worth noting that, please refer to Figure 1 、 Figure 8 - Figure 11 , the sealing assembly 7 is used to seal the gap between the upper mold 3 and the lower mold 4 during hot pressing; the sealing assembly 7 includes a sealing frame 71, and two mounting grooves are provided on the lower mold 4. The sealing frame 71 is vertically slidably connected to the two mounting grooves of the lower mold 4 (such as Figure 10 and Figure 12 As shown, the slider 61 is fixedly connected with an inclined block 72 (as shown Figure 11As shown in FIG, the four inclined plane blocks 72 slide in contact with the bottom outer wall of the sealing frame 71 during movement, and the sealing frame 71 is in contact with the bottom edge of the upper mold 3 during movement. When the two slide bars 62 move toward each other and are about to move into position, the four inclined plane blocks 72 can be inserted into the bottom of the sealing frame 71 and the inclined surfaces of the four inclined plane blocks 72 push the sealing frame 71 upward, so that the sealing frame 71 moves up a certain distance (as shown in FIG. Figure 10 、 Figure 11 As shown), after the upper mold 3 and the lower mold 4 press the plate, the sealing frame 71 moves upward to seal the gap formed between the upper mold 3 and the lower mold 4, thereby achieving a certain thermal insulation effect and reducing the energy consumption of the high-frequency heating device by reducing heat loss.

[0052] It is worth mentioning that see Figure 8 、 Figure 12 - Figure 13 The sealing frame 71 is hollow, and a plurality of air holes 73 are opened on the inner side of the sealing frame 71. Four air bags 74 are fixedly installed on the lower mold 4. The four air bags 74 are respectively located at the four corners of the top surface of the lower mold 4. The pressing plate 2 squeezes the four air bags 74 during the movement. The air bags 74 can reset themselves after leaving the pressing plate 2. The four air bags 74 are respectively fixedly connected with air pipes 75. The air pipes 75 are made of flexible material. The ends of the four air pipes 75 away from the air bags 74 are connected to the sealing frame 71. After the pressing plate 2 squeezes the four air bags 74, The four air bags 74 respectively transport air to the sealing frame 71 through four air pipes 75. After the sealing frame 71 rises, the air is injected into the sealing frame 71. When the upper mold 3 and the lower mold 4 press the plate, the sealing frame 71 moves up and plays a sealing role. At the same time, the air in the sealing frame 71 is injected into the gap between the upper mold 3 and the lower mold 4 through multiple air holes 73. The air can push the unsolidified adhesive inside the plate into the fiber gap of the plate, thereby improving the permeability of the adhesive and then improving the overall stability of the plate.

[0053] Example 2

[0054] A high-efficiency hot-pressing forming process for a cedar homogeneous board, using the high-efficiency hot-pressing forming device for a cedar homogeneous board in Example 1, further comprising the following steps:

[0055] Step 1: Raw material preparation and pretreatment: Use a high-precision band saw to cut the logs into thin boards of uniform specifications, and use grinding equipment to finely grind the surface of the thin boards to ensure that the thin boards reach the best pre-treated state;

[0056] Step 2: Gluing: Based on the characteristics of the cedar material and the requirements of the finished product, the adhesive composition and viscosity are precisely adjusted. An automatic gluing device is used to achieve quantitative and uniform spraying of the adhesive. After gluing is completed, the adhesive is quickly transported to the hot pressing mechanism.

[0057] Step 3: Lamination: stack the sheets layer by layer according to the design order to form a complete sheet. Pre-press the sheet to allow the adhesive to initially solidify and fix the sheet shape.

[0058] Step 4: Hot pressing: convey the sheet to the lower die 4, start the high-frequency heating device in the upper die 3 and the lower die 4, and after the upper die 3 and the lower die 4 are preheated, the upper die 3 moves down to hot press the sheet. After the sheet is compacted, it enters the pressure holding stage;

[0059] Step 5: Demolding. After the hot pressing is completed, the upper mold 3 is lifted, and the formed curved plate is removed, and the curved plate is surface treated and quality inspected.

[0060] Adopting the above structure, the working principle of this case is that the hydraulic cylinder 10 on the frame 1 can drive the pressure plate 2 to move up or down, and the pressure plate 2 drives the upper mold 3 to move up or down. The high-frequency heating device in the upper mold 3 and the lower mold 4 is the existing technology, and its specific structure and working principle are not described here. After the high-frequency heating device is started, the contact surface of the upper mold 3 and the lower mold 4 with the plate can be heated to the set temperature, thereby realizing hot pressing operation. When the pressure plate 2 moves up and down, the four guide rods 8 on the pressure plate 2 slide in the guide holes of the four guide blocks 9 respectively, and the four guide blocks 9 play a limiting role on the four guide rods 8, so that the four guide rods 8 increase the stability of the pressure plate 2 when it moves up and down through the cooperation with the four guide blocks 9, thereby avoiding the upper mold 3 from being skewed and shifted.

[0061] The plate is placed on the lower die 4, and after the hydraulic cylinder 10 is started, the upper die 3 moves downward, and the two slide rails 58 on the upper die 3 drive the four connecting blocks 53 to move downward through the four pulley seats 57, and the four slide shafts 54 on the four connecting blocks 53 drive the two slot rods 56 to move downward. When the slot rods 56 move downward, the two elastic telescopic rods 55 at both ends of the slot rods 56 contract, and the four connecting blocks 53 move downward while driving the two rotating shafts 51 to move downward. The two pressing rollers 52 on the two rotating shafts 51 are located between the upper die 3 and the plate. Therefore, when the upper die 3 moves downward, the two pressing rollers 52 first contact with the plate, and the two pressing rollers 52 first apply pressure to the surface of the plate, causing the plate to deform slightly. The elastic telescopic rods 55 themselves are elastic. When the two pressure rollers 52 apply a certain pressure value to the plate, the four elastic telescopic rods 55 stop deforming. At this time, the upper mold 3 continues to move downward, causing the pulley seats 57 on the four connecting blocks 53 to start sliding on the two slide rails 58. The contact surface between the upper mold 3 and the lower mold 4 and the plate is arc-shaped. The shape of the slide rail 58 is similar to the bottom edge of the upper mold 3. Taking one of the slot rods 56 as an example, the two sliding shafts 54 can only slide horizontally in the straight groove of the slot rod 56. Therefore, the two connecting blocks 53 are limited and can only slide horizontally on the slot rod 56, and the pulley seats 57 on the two connecting blocks 53 are limited by the slide rail 58 when the slide rail 58 moves downward. The two rollers 52 are pressed against the sheet material and move to the sides as the upper die 3 moves downward. As the two rollers 52 move to the sides, they roll the sheet material surface from the middle to the sides. Since the sheet material may be partially bulged during stacking and transportation, Rolling from the middle to both sides can flatten the locally raised and bulged areas, so that when the upper mold 3 contacts the plate, the surface of the plate can maintain a certain flatness, ensuring uniform force during hot pressing, and the adhesive in the plate can be squeezed evenly by rolling, avoiding the situation where there is too much glue in local areas during gluing and causing bulging. The excess adhesive is squeezed to the surrounding area by rolling, so that the adhesive distribution inside the plate is more even. When the bottom of the upper mold 3 contacts the plate, the two pressing rollers 52 maintain contact with the plate and move to both sides at the same time. When the upper mold 3 completely presses the plate, the two pressing rollers 52 move to both sides of the upper mold 3 respectively, without hindering the hot pressing.

[0062] When the pressure roller 52 moves, the toothed disc 59 can be regarded as a sprocket, and the set of short shafts 510 can be regarded as multiple core shafts on a chain. Therefore, when the toothed disc 59 moves with the rotating shaft 51, it can rotate through the meshing action of the set of short shafts 510, so that the two rotating shafts 51 can also use the two toothed discs 59 to drive the two pressure rollers 52 to rotate while moving. The two pressure rollers 52 can also rotate when the surface of the plate moves to both sides, and the two pressure rollers 52 rotate in opposite directions, so that the two pressure rollers 52 can increase the contact with the surface of the plate by rotating. The contact area enables the two pressing rollers 52 to continuously rub the surface of the plate using their surfaces, so that the surface of the plate forms a force to pull to both sides. The two pressing rollers 52 pull the surface of the plate to both sides, making the surface of the plate smoother, and the surface of the plate is temporarily stretched from the middle to both sides. When the upper mold 3 completely presses the plate, the two pressing rollers 52 also break away from contact with the plate, and the plate is hot-pressed and shaped. By stretching the surface of the plate from the middle to both sides in advance, it can avoid that the central part of the bent top surface of the plate will be wrinkled when the plate is bent by the downward pressure of the upper mold 3, thereby affecting the appearance quality.

[0063] When placing the plate, place the plate between the two positioning plates 63 so that the two positioning plates 63 are close to both sides of the plate, which plays a role in positioning the plate and prevents the plate from being placed crookedly and affecting the hot pressing operation. The four guide rods 8 drive the four slot plates 66 to move downward respectively as the pressing plate 2 moves downward. When the slot plates 66 move downward, they can use the oblique groove to drive the dial shaft 65 to move in the direction close to the bending center of the lower mold 4. When the dial shaft 65 moves, it can drive the slide rod 62 to move synchronously through the convex rod 64, and the slide rod 62 can slide on the lower mold 4 with the two sliders 61. Therefore, when the four slot plates 66 move downward, they can use the cooperation of the four dial shafts 65 and the four convex rods 64 to drive the two slide rods 62 to move in the direction close to each other on the lower mold 4. When the slide rod 62 moves, it drives the positioning plates 63 to move synchronously. When the plate is pressed down by the upper mold 3, the two sides of the plate will gradually gather towards the middle. , and the two positioning plates 63 can move synchronously with the two sides of the plate toward the middle, so that the two positioning plates 63 can continuously center the plate. When the plate is about to be completely bent, the plate enters the gap between the upper mold 3 and the lower mold 4, and the two sides of the plate are separated from the two positioning plates 63. At this time, the plate has been pressed tightly, so it does not need to be positioned again. The inclined groove of the slot plate 66 is also provided with a straight groove. When the plate is separated from the two positioning plates 63, the pressure plate 2 and the four slot plates 66 continue to move downward without driving the two slide rods 62 to move. The staff can rotate the two screws 68 above the slide rod 62. When the screw 68 rotates, the threaded connection relationship can be used to adjust the distance between the positioning plate 63 and the nut block 67, thereby achieving the effect of adjusting the distance between the two positioning plates 63 by rotating the four screws 68, thereby matching plates of different widths.

[0064] When the slider 61 moves, the inclined plane block 72 moves synchronously, so that when the two slide bars 62 move in the direction close to each other and are about to move into place, the four inclined plane blocks 72 can be inserted into the bottom of the sealing frame 71 and push the sealing frame 71 upward through the inclined surfaces of the four inclined plane blocks 72, so that the sealing frame 71 moves up a certain distance. When the upper mold 3 and the lower mold 4 press the plate, the sealing frame 71 moves up to seal the gap formed between the upper mold 3 and the lower mold 4, thereby achieving a certain heat preservation effect, avoiding the gap between the upper mold 3 and the lower mold 4 to continuously emit heat during hot pressing, thereby increasing the energy consumption of the high-frequency heating device, and also causing the ambient temperature around the frame 1 to rise, causing discomfort to the operator; when the pressing plate 2 is about to move down into place, it is in contact with the four air bags 74 The four air bags 74 are contacted and squeezed, so that the four air bags 74 respectively transport air to the sealing frame 71 through four air tubes 75. The air tubes 75 are made of flexible material. The air bags 74 can reset themselves after being separated from the pressure plate 2. After the sealing frame 71 rises, air is injected into the sealing frame 71. When the upper mold 3 and the lower mold 4 press the plate, the sealing frame 71 moves up and plays a sealing role. At the same time, the air in the sealing frame 71 is injected into the gap between the upper mold 3 and the lower mold 4 through multiple air holes 73, so that the air pressure exposed to the plate between the upper mold 3 and the lower mold 4 increases, so that the air between the upper mold 3 and the lower mold 4 can push the unsolidified adhesive inside the plate into the fiber gap of the plate, thereby improving the permeability of the adhesive and further improving the overall stability of the plate.

[0065] The above description is merely a specific embodiment of the present invention, but the scope of protection of the present invention is not limited thereto. Any modifications or substitutions that can be easily conceived by a person skilled in the art within the technical scope disclosed in the present invention should be included in the scope of protection of the present invention. Therefore, the scope of protection of the present invention should be based on the scope of protection of the claims.

Claims

1. A high-efficiency hot-pressing forming device for a cedar homogeneous board, comprising a frame (1), characterized in that: Two hydraulic cylinders (10) are installed on the frame (1), the output ends of the two hydraulic cylinders (10) are fixedly connected to a pressure plate (2), an upper mold (3) is fixedly installed on the bottom surface of the pressure plate (2), and a lower mold (4) is installed on the frame (1); It also includes a calendering assembly (5) for rolling the sheet material flat; A positioning component (6) for centering the plate; A sealing assembly (7) for sealing the gap between the upper mold (3) and the lower mold (4) during hot pressing; The calendering assembly (5) comprises two rotating shafts (51), the outer walls of the two rotating shafts (51) are respectively fixedly connected to pressure rollers (52), the two ends of the rotating shafts (51) are respectively rotatably connected to connecting blocks (53), the connecting blocks (53) are respectively fixedly connected to a sliding shaft (54) and a pulley seat (57), the outer walls of the two ends of the lower mold (4) are respectively fixedly connected to two guide blocks (9), the four guide blocks (9) are respectively fixedly installed with elastic telescopic rods (55), the two elastic telescopic rods (55) located at the same end of the lower mold (4) are fixedly connected to a groove rod (56), and the outer walls of the two ends of the upper mold (3) are respectively fixedly installed with slide rails (58); The sealing assembly (7) includes a sealing frame (71); The sealing frame (71) is hollow and has a plurality of air holes (73) formed on the inner side of the sealing frame (71). Four air bags (74) are fixedly mounted on the lower mold (4). The four air bags (74) are respectively located at the four corners of the top surface of the lower mold (4). The pressing plate (2) squeezes the four air bags (74) during movement. The four air bags (74) are respectively fixedly connected with air pipes (75). The ends of the four air pipes (75) away from the air bags (74) are connected to the sealing frame (71).

2. The high-efficiency hot-pressing forming device for cedar homogeneous boards according to claim 1, characterized in that: Four guide rods (8) are fixedly connected to the bottom surface of the pressing plate (2), and the four guide rods (8) are respectively located at the four corners of the bottom surface of the pressing plate (2). The four guide blocks (9) are respectively provided with guide holes, and the four guide rods (8) are respectively slidably connected to the guide holes of the four guide blocks (9). High-frequency heating devices are respectively provided in the upper mold (3) and the lower mold (4).

3. The high-efficiency hot-pressing forming device for a cedar homogeneous board according to claim 2, characterized in that: The two pressing rollers (52) are both located below the upper mold (3). The two pressing rollers (52) are mirror-imaged. A straight groove is provided on the slot rod (56). The two sliding shafts (54) on the connecting blocks (53) at both ends of the rotating shaft (51) are respectively slidably connected to the straight grooves of the two slot rods (56). The two pulley seats (57) on the connecting blocks (53) at both ends of the rotating shaft (51) are respectively slidably connected to the two slide rails (58) through a pulley block.

4. The high-efficiency hot-pressing forming device for cedar homogeneous boards according to claim 3, characterized in that: A toothed disc (59) is fixedly connected to the outer wall of one end of the rotating shaft (51), and a group of short shafts (510) are fixedly installed on the outer walls of both ends of the upper mold (3), and the two toothed discs (59) are respectively engaged with the two groups of short shafts (510).

5. The high-efficiency hot-pressing forming device for the homogeneous cedar board according to claim 2, characterized in that: The positioning assembly (6) includes two slide bars (62), the bottoms of the two slide bars (62) are fixedly connected to two sliders (61), the lower mold (4) is provided with four slide grooves, the four sliders (61) are slidably installed in the four slide grooves of the lower mold (4), and the slide bars (62) are slidably connected to a positioning plate (63), and the two positioning plates (63) are mirror-imaged.

6. The high-efficiency hot-pressing forming device for the homogeneous cedar board according to claim 5, characterized in that: Both ends of the slide rod (62) are fixedly connected to convex rods (64), and one end of the convex rod (64) away from the slide rod (62) is fixedly connected to a shifting shaft (65). The outer walls of the four guide rods (8) are fixedly connected to slot plates (66), and the slot plates (66) are provided with oblique grooves. The four shifting shafts (65) are slidably connected to the oblique grooves on the four slot plates (66).

7. The high-efficiency hot-pressing forming device for the homogeneous cedar board according to claim 6, characterized in that: Two nut blocks (67) are fixedly connected to the slide rod (62), and two screw rods (68) are rotatably connected to the positioning plate (63). The four screw rods (68) are respectively threadedly connected to the four nut blocks (67).

8. The high-efficiency hot-pressing forming device for the homogeneous cedar board according to claim 6, characterized in that: The lower mold (4) is provided with two mounting grooves, and the sealing frame (71) is vertically slidably connected in the two mounting grooves of the lower mold (4). The slider (61) is fixedly connected with an inclined surface block (72). The four inclined surface blocks (72) are in sliding contact with the bottom outer wall of the sealing frame (71) during movement. The sealing frame (71) is in contact with the bottom edge of the upper mold (3) during movement.

9. An efficient hot pressing process for forming a homogeneous plate made of cedar, characterized by: The high-efficiency hot-pressing forming device for the homogeneous cedar board according to any one of claims 1 to 8 further comprises the following steps: Step 1: Raw material preparation and pretreatment: Use a high-precision band saw to cut the logs into thin boards of uniform specifications, and use grinding equipment to finely grind the surface of the thin boards to ensure that the thin boards reach the best pre-treated state; Step 2: Gluing: Based on the characteristics of the cedar material and the requirements of the finished product, the adhesive composition and viscosity are precisely adjusted. An automatic gluing device is used to achieve quantitative and uniform spraying of the adhesive. After gluing is completed, the adhesive is quickly transported to the hot pressing mechanism. Step 3: Lamination: stack the sheets layer by layer according to the design order to form a complete sheet. Pre-press the sheet to allow the adhesive to initially solidify and fix the sheet shape. Step 4: hot pressing, the plate is conveyed to the lower die (4), the high-frequency heating device in the upper die (3) and the lower die (4) is started, and after the upper die (3) and the lower die (4) are preheated, the upper die (3) moves downward to hot press the plate, and the plate enters the pressure holding stage after being compacted; Step 5: Demolding. After the hot pressing is completed, the upper mold (3) is lifted to remove the formed curved plate, and the curved plate is subjected to surface treatment and quality inspection.

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