Polyvinyl chloride composite board pressing machine for constructional engineering
By designing a polyvinyl chloride composite sheet press machine including a pressing base, a gantry, a hydraulic press, a telescopic rod, a pulling plate and a cleaning mechanism, the problem of the inability to automatically eject the plate body after pressing in the prior art is solved, and the automatic pressing and removal of the sheet is realized, and the working efficiency is improved.
Patent Information
- Application Number
- CN202510177319.X
- Authority / Receiving Office
- CN · China
- Patent Type
- Applications(China)
- Current Assignee / Owner
- Filing Date
- 2025-02-18
- Publication Date
- 2025-04-18
- Estimated Expiration
- Not applicable · inactive patent
AI Technical Summary
The prior art cannot automatically eject the plate body after the polyvinyl chloride composite sheet is pressed, resulting in staff needing to take it out manually, reducing work efficiency.
A polyvinyl chloride composite sheet press for construction engineering is designed, including a pressing base, a gantry, a hydraulic press, a telescopic rod, a pull plate and a cleaning mechanism. Through mechanical devices such as electric push rods, motors, threaded rods and gears, automatic limiting, cutting and ejection of the plate is achieved.
The automatic pressing and removal of polyvinyl chloride composite sheets is realized, which improves work efficiency and reduces the time and labor intensity of manual operation.
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Figure CN119840191A_ABST
Abstract
Description
Technical Field
[0001] The invention relates to the technical field of composite plate pressing, in particular to a polyvinyl chloride composite plate pressing machine for construction engineering. Background Art
[0002] PVC composite sheet is a sheet made of polyvinyl chloride (PVC) and other materials. It has high compressive strength and impact resistance, and can withstand certain external forces without being easily damaged. Polyvinyl chloride (PVC) is a thermoplastic with good flame retardancy, wear resistance, chemical corrosion resistance and insulation. Polyvinyl chloride composite sheets are made by combining PVC with one or more other materials (such as metal, wood, stone, etc.) through a specific process. When making composite sheets, multiple sheet materials need to be pressed together. Most of the existing composite sheets cannot limit the position of multiple sheets during the pressing operation. When the sheets are pressed together, they will be offset and misaligned, which will affect the subsequent pressing effect.
[0003] In order to overcome the above defects, prior art 1 (Announcement No.: CN219096190U, Chinese patent with announcement date of 2023-05-30) is a laminating device for multi-layer composite panels, which relates to the technical field of multi-layer composite panels, and includes a support table, the top of which is fixedly connected to a support frame and a positioning box, and an adjustment groove is provided at the middle end of the support frame from top to bottom, and an adjustment member is movably connected to the groove wall of the adjustment groove. The utility model solves the problem that the laminating mechanism of the laminating device of the multi-layer composite panel has low mobilization performance, cannot be adjusted accordingly according to the size specifications of the multi-layer composite panel, is not conducive to the operator's control, reduces the laminating efficiency of the laminating mechanism of the laminating device of the multi-layer composite panel, and also reduces the quality of the multi-layer composite panel molding. The laminating mechanism of the laminating device of the multi-layer composite panel has excellent mobilization performance, and can be adjusted accordingly according to the size specifications of the multi-layer composite panel, which is conducive to the operator's control, improves the laminating efficiency of the laminating mechanism of the laminating device of the multi-layer composite panel, and ensures the quality of the multi-layer composite panel molding.
[0004] There is also prior art 2 (publication number: CN116080245A, Chinese patent with publication date of 2023-05-09) a composite board intelligent pressing device and a pressing method thereof, belonging to the technical field of composite board pressing equipment, a composite board intelligent pressing device, comprising a support frame covering a pressing table, a hydraulic cylinder installed on the support frame, the hydraulic cylinder connected to a pressing plate, and the pressing plate is located directly above the pressing table, characterized in that: one of the front and rear sides of the pressing table is a feeding side, and the other side is a closed side, and a back plate is installed on the closed side, and clamping devices are installed on both sides of the pressing table, and the clamping device includes a vertical plate, a cavity is opened on the vertical plate, a rotating wheel is arranged in the cavity, and a rubber material is arranged on the rotating outer layer, and the middle part of the rotating wheel is fixed through a rotating rod, and the upper and lower ends of the rotating rod are rotatably connected to the upper and lower sides of the cavity through bearings, so as to solve the technical problem of displacement caused by the pressing process of the plate, and is mainly used in the pressing of multi-layer plates.
[0005] Although the existing technologies 1 and 2 can limit the pressed plates during the pressing process of the composite panels to reduce the occurrence of plate deviation during the pressing process, the existing technologies still require workers to manually remove the plates from the limiting device when taking them out after the pressing is completed. The device cannot automatically eject the pressed plates, and manual taking reduces work efficiency to a certain extent.
[0006] Therefore, we propose a polyvinyl chloride composite sheet pressing machine for construction engineering to solve the above problems. Summary of the invention
[0007] The object of the present invention is to provide a polyvinyl chloride composite board pressing machine for construction engineering, so as to solve the problem in the current market proposed by the above-mentioned background technology that workers need to manually remove it from the limiting device, and the device cannot automatically eject the pressed board. Manual removal reduces the work efficiency to a certain extent.
[0008] To achieve the above-mentioned object, the present invention provides the following technical solution: A polyvinyl chloride composite sheet pressing machine for construction engineering, comprising a pressing base, a gantry is fixedly connected to the corners of the upper surface of the pressing base, an extrusion plate is nested and connected to the inner side of the gantry, and a hydraulic press is fixedly connected between the upper surface of the extrusion plate and the inner side of the upper surface of the gantry; A telescopic rod, the telescopic rod is fixedly connected to the inner side of the pressing base, and the upper end of the telescopic rod is fixedly connected to a placing plate, the side of the pressing base is nested with a pull plate, and the outer side of the pull plate is fixedly connected to a handle, and a moving mechanism for ejecting the laminated composite sheet is provided between the inner side of the pull plate and the inside of the pressing base, and a cleaning mechanism for cleaning the laminated sheet waste is also provided between the inner side of the pull plate and the inner wall side of the pressing base.
[0009] Preferably, the moving mechanism comprises a twisted rod, the twisted rod is nested and connected at the four inner corners of the pressing base, and the outer side of the lower end of the twisted rod is fixedly connected with a gear, and the outer side of the upper end of the twisted rod is threadedly connected with a sleeve rod, the upper end of the sleeve rod is fixedly connected to the lower surface of the placement plate, and a spring is fixedly connected between the lower surface of the placement plate and the pressing base; A toothed plate is fixedly connected to the inner side of the edge of the pull plate, and the toothed plate is nested and connected inside the pressing base.
[0010] Preferably, the tooth plate and the gear are meshed with each other, the twisted rod forms a rotating structure through the gear and the pressing base, and the placement plate forms a sliding structure through the sleeve rod.
[0011] Preferably, the telescopic rods are designed with ten groups of rectangular arrays of placement plates, the springs are wound around the outside of the telescopic rods, and the placement plates form an elastic structure through the springs and the pressed base.
[0012] Preferably, the cleaning mechanism includes a connecting rod, the connecting rod is fixedly connected to the inner center of the pull plate, a dust discharge groove is provided on the side of the pressing base, an extrusion plate is fixedly connected to the inner end of the connecting rod, a cleaning brush is fixedly connected to the lower side of the extrusion plate, and the side end of the extrusion plate is nested and connected to the inside of the pressing base; An air bag is fixedly connected to the outer side of the upper end of the extrusion plate, and the outer side of the air bag is fixedly connected to the inner wall of the pressing base, and a dust cleaning nozzle is penetrated and connected to the lower side edge of the air bag.
[0013] Preferably, the dust discharge trough and the cleaning brush are located at the same horizontal position, the lower surface of the cleaning brush is in contact with the pressed base, the extrusion plate forms an integrated structure with the pull plate through the connecting rod, and the extrusion plate forms a sliding structure with the pressed base through the connecting rod.
[0014] Preferably, the cleaning nozzle is designed with a zigzag structure, and the outer end of the cleaning nozzle is facing one side of the ash discharge trough.
[0015] Preferably, the left and right sides of the pressing base are fixedly connected with electric push rods, and the output end of the electric push rod is fixedly connected with the electric push rod, the upper surface side of the pressing base is fixedly connected with an auxiliary frame, and the interior of the auxiliary frame is nested with a threaded rod, and the outer end of the threaded rod is fixedly connected with a motor, the outer side of the threaded rod is threadedly connected with an internal thread block, and the internal thread block is nested on the auxiliary frame, and the lower side of the internal thread block is fixedly connected with a cutting knife.
[0016] Preferably, the cutting knife is located on the side of the placement plate, and the internal thread block forms a sliding structure with the auxiliary frame through a threaded rod.
[0017] Compared with the prior art, the present invention has the following beneficial effects: The staff can place the composite sheet on the placement plate at one time, and then start the electric push rod to drive the limit plate to move to the side of the placement plate, so as to assist in limiting the multi-layer sheet, and reduce the possibility of the sheet being offset and dislocated when the hydraulic press drives the extrusion plate to move down to punch the sheet, thereby affecting the punching effect; When the sheet is stamped, the staff can start the motor and drive the threaded rod to rotate through the motor. At this time, the threaded rod will synchronously drive the internal thread block to move along the auxiliary frame. While moving, the internal thread block will cut the excess polyvinyl chloride sheet overflowed from the composite sheet due to extrusion, thereby further improving the pressing efficiency of the composite sheet. After the cutting is completed, the staff can pull the handle outwards and drive the pull plate to move outwards through the handle. At this time, the pull plate will synchronously drive the tooth plate to move along the inside of the pressing base to limit the movement. During the movement of the tooth plate, it will drive the gear meshing with it to rotate synchronously, and drive the twist rod to rotate through the gear. At this time, the sleeve rod will synchronously drive the placement plate to move up under the driving action of the twist rod, so that the placement plate drives the pressed composite plate to move up and eject, which is convenient for the staff to take the pressed plate; When the placement plate moves up, the telescopic rod will be extended and retracted synchronously, and the spring will also undergo elastic deformation as the placement plate moves up, thereby making the placement plate move up more stably and allowing the composite plate to move up stably; When the pulling plate moves outward, it will synchronously drive the extrusion plate to move outward through the connecting rod. At this time, the extrusion plate will drive the cleaning brush on the lower side to clean the PVC sheet waste contained in the pressing base, and clean the PVC sheet waste to the inside of the ash discharge trough. At the same time, the extrusion plate will squeeze the airbag when moving. At this time, the gas inside the airbag will be discharged outward through the cleaning nozzle, thereby cleaning the PVC sheet waste gathered on the inside of the ash discharge trough, so that the PVC sheet waste is discharged from the inside of the pressing base, reducing the impact of the PVC sheet waste on the subsequent pressing operation. BRIEF DESCRIPTION OF THE DRAWINGS
[0018] Figure 1 It is a schematic diagram of the three-dimensional structure of the present invention; Figure 2 It is a schematic diagram of a three-dimensional cross-sectional structure of the present invention; Figure 3 This is a schematic diagram of the three-dimensional structure of the press-fit base of the present invention; Figure 4 It is a schematic diagram of a three-dimensional cross-sectional structure of a press-fit base of the present invention; Figure 5 It is a schematic diagram of the three-dimensional structure of the connecting rod of the present invention; Figure 6It is a schematic diagram of the three-dimensional structure of the spring of the present invention; Figure 7 It is a schematic diagram of the three-dimensional structure of the tooth plate of the present invention; Figure 8 This is a schematic diagram of the three-dimensional structure of the placement plate of the present invention; Fig. 9 This is a schematic diagram of the three-dimensional structure of the extruded plate of the present invention; Fig.10 It is a schematic diagram of the three-dimensional structure of the threaded rod of the present invention.
[0019] In the figure: 1. Pressing base; 2. Gantry; 3. Hydraulic press; 4. Extrusion plate; 5. Auxiliary frame; 6. Electric push rod; 7. Pull plate; 8. Handle; 9. Threaded rod; 10. Motor; 11. Tooth plate; 12. Twisted rod; 13. Sleeve rod; 14. Placement plate; 15. Telescopic rod; 16. Spring; 17. Limit plate; 18. Cutting knife; 19. Airbag; 20. Extrusion plate; 21. Cleaning brush; 22. Gear; 23. Connecting rod; 24. Internal thread block; 25. Cleaning nozzle; 26. Ash discharge trough. DETAILED DESCRIPTION
[0020] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.
[0021] Embodiment 1: Figure 1 , Figure 2 , Figure 4 and Fig. 9 The technical solution shown in the figure, the present invention provides the following technical solution: a polyvinyl chloride composite sheet pressing machine for construction engineering, a cutting knife 18 is disclosed, and the excess sheet can be cut by the cutting knife 18: A pressing base 1, a gantry 2 is fixedly connected to the corners of the upper surface of the pressing base 1, and an extrusion plate 4 is nested and connected to the inner side of the gantry 2, and a hydraulic press 3 is fixedly connected between the upper surface of the extrusion plate 4 and the inner side of the upper surface of the gantry 2; The left and right sides of the pressing base 1 are fixedly connected with electric push rods 6, and the output end of the electric push rods 6 is fixedly connected with the electric push rods 6, the upper surface side of the pressing base 1 is fixedly connected with an auxiliary frame 5, and the interior of the auxiliary frame 5 is nested with a threaded rod 9, and the outer end of the threaded rod 9 is fixedly connected with a motor 10, the outer side of the threaded rod 9 is threadedly connected with an internal thread block 24, and the internal thread block 24 is nested on the auxiliary frame 5, and the lower side of the internal thread block 24 is fixedly connected with a cutting knife 18, the cutting knife 18 is located on the side of the placement plate 14, and the internal thread block 24 forms a sliding structure with the auxiliary frame 5 through the threaded rod 9.
[0022] The staff can place the composite sheet material on the placement plate 14 at one time, and then start the electric push rod 6, and drive the limit plate 17 to move to the side of the placement plate 14 through the electric push rod 6, so as to assist in limiting the multi-layer sheet material, and reduce the displacement and misalignment of the sheet material when the hydraulic press 3 drives the extrusion plate 4 to move down to punch the sheet material. When the sheet material is punched, the staff can start the motor 10 and drive the threaded rod 9 to rotate through the motor 10. At this time, the threaded rod 9 will synchronously drive the internal thread block 24 to move along the auxiliary frame 5 for limiting movement. While moving, the internal thread block 24 will cut the excess polyvinyl chloride sheet material overflowed from the composite sheet material due to extrusion, thereby further improving the pressing efficiency of the composite sheet material.
[0023] Embodiment 2: Figure 2 , Figure 5 , Figure 6 , Figure 7 and Figure 8 The technical solution shown in the figure, the present invention provides the following technical solution: a polyvinyl chloride composite board pressing machine for construction engineering, disclosing a moving mechanism, through which the pressed board can be ejected: A telescopic rod 15, the telescopic rod 15 is fixedly connected to the inner side of the pressing base 1, and the upper end of the telescopic rod 15 is fixedly connected to a placement plate 14, the side of the pressing base 1 is nested with a pull plate 7, and the outer side of the pull plate 7 is fixedly connected to a handle 8, and a moving mechanism that can eject the laminated composite sheet is provided between the inner side of the pull plate 7 and the inside of the pressing base 1; The moving mechanism includes a twisted rod 12, which is nested and connected at the four inner corners of the pressing base 1, and a gear 22 is fixedly connected to the outer side of the lower end of the twisted rod 12, and a sleeve rod 13 is threadedly connected to the outer side of the upper end of the twisted rod 12, and the upper end of the sleeve rod 13 is fixedly connected to the lower surface of the placement plate 14, and a spring 16 is fixedly connected between the lower surface of the placement plate 14 and the pressing base 1, and a tooth plate 11 is fixedly connected to the inner side of the edge end of the pull plate 7, and the tooth plate 11 is nested and connected to the inside of the pressing base 1, and the tooth plate 11 and the gear 22 are meshed with each other, the twisted rod 12 forms a rotating structure with the pressing base 1 through the gear 22, and the placement plate 14 forms a sliding structure through the sleeve rod 13, and ten groups of telescopic rods 15 are designed with respect to the rectangular array of the placement plate 14, and the spring 16 is wound around the outer side of the telescopic rod 15, and the placement plate 14 forms an elastic structure with the pressing base 1 through the spring 16.
[0024] After the cutting is completed, the staff can pull the handle 8 outward and drive the pull plate 7 to move outward through the handle 8. At this time, the pull plate 7 will synchronously drive the toothed plate 11 to move within the pressing base 1. During the movement, the toothed plate 11 will drive the gear 22 meshing with it to rotate synchronously, and drive the twisted rod 12 to rotate through the gear 22. At this time, the sleeve rod 13 will synchronously drive the placement plate 14 to move up under the driving action of the twisted rod 12, so that the placement plate 14 drives the pressed composite plate to move up and out, which is convenient for the staff to take the pressed plate. When the placement plate 14 moves up, the telescopic rod 15 will synchronously extend and retract, and at the same time, the spring 16 will also undergo elastic deformation as the placement plate 14 moves up, thereby making the placement plate 14 move up more stably, so that the composite plate can be stably moved up. Example
[0025] like Figure 1 , Figure 2 , Figure 3 , Figure 5 and Figure 7 The technical solution shown in the figure, the present invention provides the following technical solution: a polyvinyl chloride composite sheet pressing machine for construction engineering, a cleaning mechanism is disclosed, and the cutting waste can be cleaned by the cleaning mechanism: A cleaning mechanism for cleaning the waste of the pressed plate is also provided between the inner side of the pulling plate 7 and the inner wall side of the pressing base 1; The cleaning mechanism includes a connecting rod 23, which is fixedly connected to the inner center of the pull plate 7, and a dust discharge groove 26 is opened on the side of the pressed base 1. The inner end of the connecting rod 23 is fixedly connected to the extrusion plate 20, and the lower side of the extrusion plate 20 is fixedly connected to the cleaning brush 21, and the edge of the extrusion plate 20 is nested and connected to the inside of the pressed base 1, the outer side of the upper end of the extrusion plate 20 is fixedly connected to the air bag 19, and the outer side of the air bag 19 is fixedly connected to the inner wall of the pressed base 1, and the lower side of the air bag 19 is penetrated and connected with a dust cleaning nozzle 25, the dust discharge groove 26 and the cleaning brush 21 are located at the same horizontal position, and the lower surface of the cleaning brush 21 is in contact with the pressed base 1, the extrusion plate 20 forms an integrated structure with the pull plate 7 through the connecting rod 23, and the extrusion plate 20 forms a sliding structure with the pressed base 1 through the connecting rod 23, the dust cleaning nozzle 25 is designed with a zigzag structure, and the outer end of the dust cleaning nozzle 25 faces the side of the dust discharge groove 26.
[0026] When the pulling plate 7 moves outward, it will synchronously drive the squeezing plate 20 to move outward through the connecting rod 23. At this time, the squeezing plate 20 will drive the cleaning brush 21 on the lower side to clean the PVC sheet waste contained in the pressing base 1, and clean the PVC sheet waste to the inner side of the dust discharge groove 26. At the same time, the squeezing plate 20 will squeeze the airbag 19 when moving. At this time, the gas inside the airbag 19 will be discharged outward through the dust cleaning nozzle 25, thereby cleaning the PVC sheet waste accumulated on the inner side of the dust discharge groove 26, so that the PVC sheet waste is discharged from the pressing base 1, reducing the impact of the PVC sheet waste on the subsequent pressing operation.
[0027] Although the present invention has been described in detail with reference to the aforementioned embodiments, it is still possible for those skilled in the art to modify the technical solutions described in the aforementioned embodiments, or to make equivalent substitutions for some of the technical features therein. Any modifications, equivalent substitutions, improvements, etc. made within the spirit and principles of the present invention should be included in the protection scope of the present invention.
Claims
1. A polyvinyl chloride composite sheet pressing machine for construction engineering, comprising a pressing base (1), a gantry (2) fixedly connected to the corners of the upper surface of the pressing base (1), an extrusion plate (4) nested inside the gantry (2), and a hydraulic press (3) fixedly connected between the upper surface of the extrusion plate (4) and the inner side of the upper surface of the gantry (2); It is characterized in that The pressing machine also includes: A telescopic rod (15) is fixedly connected to the inner side of the pressing base (1), and the upper end of the telescopic rod (15) is fixedly connected to a placement plate (14), a pull plate (7) is nested and connected to the side of the pressing base (1), and a handle (8) is fixedly connected to the outer side of the pull plate (7), and a moving mechanism for ejecting the laminated composite sheet is provided between the inner side of the pull plate (7) and the inside of the pressing base (1), and a cleaning mechanism for cleaning the laminated sheet waste is also provided between the inner side of the pull plate (7) and the inner wall side of the pressing base (1).
2. The polyvinyl chloride composite sheet pressing machine for construction engineering according to claim 1, characterized in that: The moving mechanism comprises a twisted rod (12), the twisted rod (12) being nested and connected at the four inner corners of the pressing base (1), and a gear (22) being fixedly connected to the outer side of the lower end of the twisted rod (12), and a sleeve rod (13) being threadedly connected to the outer side of the upper end of the twisted rod (12), the upper end of the sleeve rod (13) being fixedly connected to the lower surface of a placement plate (14), and a spring (16) being fixedly connected between the lower surface of the placement plate (14) and the pressing base (1); A tooth plate (11) is fixedly connected to the inner side of the edge of the pull plate (7), and the tooth plate (11) is nested and connected inside the pressing base (1).
3. The polyvinyl chloride composite sheet pressing machine for construction engineering according to claim 2, characterized in that: The toothed plate (11) and the gear (22) are meshed with each other, the twisted rod (12) forms a rotating structure with the pressing base (1) via the gear (22), and the placement plate (14) forms a sliding structure via the sleeve rod (13).
4. The polyvinyl chloride composite sheet pressing machine for construction engineering according to claim 2, characterized in that: The telescopic rods (15) are designed to have ten groups in a rectangular array with respect to the placement plate (14); the springs (16) are wound around the outside of the telescopic rods (15); and the placement plate (14) forms an elastic structure with the pressing base (1) via the springs (16).
5. The polyvinyl chloride composite sheet pressing machine for construction engineering according to claim 1, characterized in that: The cleaning mechanism comprises a connecting rod (23), the connecting rod (23) being fixedly connected to the inner center of the pull plate (7), a dust discharge groove (26) being provided on the side of the pressing base (1), an inner end of the connecting rod (23) being fixedly connected to an extrusion plate (20), a cleaning brush (21) being fixedly connected to the lower side of the extrusion plate (20), and an edge of the extrusion plate (20) being nested and connected inside the pressing base (1); An air bag (19) is fixedly connected to the outer side of the upper end of the extrusion plate (20), and the outer side of the air bag (19) is fixedly connected to the inner wall of the pressing base (1), and a dust cleaning nozzle (25) is connected through the lower side edge of the air bag (19).
6. The polyvinyl chloride composite sheet pressing machine for construction engineering according to claim 5, characterized in that: The dust discharge groove (26) and the cleaning brush (21) are located at the same horizontal position, the lower surface of the cleaning brush (21) is in contact with the pressing base (1), the extrusion plate (20) forms an integrated structure with the pull plate (7) via the connecting rod (23), and the extrusion plate (20) forms a sliding structure with the pressing base (1) via the connecting rod (23).
7. The polyvinyl chloride composite sheet pressing machine for construction engineering according to claim 5, characterized in that: The ash cleaning nozzle (25) is designed with a zigzag structure, and the outer end of the ash cleaning nozzle (25) faces one side of the ash discharge trough (26).
8. The polyvinyl chloride composite sheet pressing machine for construction engineering according to claim 1, characterized in that: The left and right sides of the pressing base (1) are fixedly connected to electric push rods (6), and the output end of the electric push rod (6) is fixedly connected to the electric push rod (6); the upper surface side of the pressing base (1) is fixedly connected to an auxiliary frame (5), and the auxiliary frame (5) is internally connected with a threaded rod (9), and the outer end of the threaded rod (9) is fixedly connected to a motor (10); the outer side of the threaded rod (9) is threadedly connected to an internal thread block (24), and the internal thread block (24) is nested on the auxiliary frame (5), and the lower side of the internal thread block (24) is fixedly connected to a cutting knife (18).
9. The polyvinyl chloride composite sheet pressing machine for construction engineering according to claim 8, characterized in that: The cutting knife (18) is located on the side of the placement plate (14), and the internal thread block (24) forms a sliding structure with the auxiliary frame (5) through the threaded rod (9).
Citation Information
Patent Citations
Intelligent composite board pressing device and pressing method thereof
CN116080245A
Laminating device for multi-layer composite board
CN219096190U