A PVC floor board pressing and forming machine

Abstract

The present invention provides a PVC floor board pressing and forming machine, which relates to the technical field of PVC floor production. The PVC floor board pressing and forming machine comprises a conveying frame and a controller. The present invention, through the involute outer contour of the toggle block abutting against the pressing plate, cooperates with the extrusion of the spring, so that the pressing plate and the pressing cylinder can be driven to rise and fall according to a predetermined distance, thereby achieving the purpose of accurately adjusting the height of the pressing cylinder. The electromagnetic clutch brakes the second slide bar, so that the position of the pressing cylinder will not change during the pressing process. When the height needs to be adjusted, the electromagnetic clutch is disconnected by power failure, so that the second slide bar can be slidably connected with the electromagnetic clutch. Before pressing, a negative pressure is formed in the negative pressure box by a negative pressure pump, and the negative pressure in the negative pressure box is adsorbed and removed from the surface of the board through the first air pipe, the connecting pipe and the dust suction port, and the impurity removal effect is good.

Description

Technical Field

[0001] The present invention relates to the technical field of PVC floor production, and specifically relates to a PVC floor board pressing and forming machine. Background Art

[0002] In the production process of PVC floors, a pressing and forming machine is required for processing. During the processing of the current pressing and forming machine, a pressing cylinder is generally used for pre-pressing treatment to eliminate the gaps between the boards. According to the processing thickness of the PVC floor, the height of the pressing cylinder needs to be adjusted. However, when adjusting the pressing cylinder, most of them are adjusted by a hydraulic cylinder. Although the operation is relatively convenient, due to the relatively fast speed of the output end of the hydraulic cylinder, the error generated will also be relatively large, and the height of the pressing cylinder adjustment cannot be accurately controlled, thus affecting the processing accuracy of the floor. And currently, when the forming machine is processing, it cannot clean the impurities attached to the surface of the PVC floor, which is likely to cause indentations on the floor surface during subsequent pressing, thereby affecting the product quality. This device is aimed at the pre-pressing treatment during the preparation of PVC floors. Therefore, an improved technology is proposed for a PVC floor board pressing and forming machine, which belongs to the technical field of PVC floor production. It solves the problems that in the processing process of the current pressing and forming machine, the pressing cylinder is prone to large errors during adjustment, and indentations are likely to appear on the floor surface during pressing. This PVC floor board pressing and forming machine includes a conveying device. A first fixing frame is fixed on the left side of the top of the conveying device. A threaded column penetrates through the top of the first fixing frame, and the threaded column is threadedly connected to the penetrating part of the first fixing frame. The bottom of the threaded column is rotatably connected to a folding plate, and the surface of the folding plate is rotatably connected to a pressing cylinder body. The top of the threaded column is fixed with a turntable, and the top of the turntable is fixed with a handle. The present invention can adjust the height of the pressing cylinder according to the processing thickness of the PVC floor, and the adjustment accuracy is higher, improving the processing accuracy of the PVC floor. And it can also clean the impurities on the surface of the PVC floor, improving the processing quality of the floor;

[0003] However, there are obvious drawbacks in the use of the above improved technology. First, when removing impurities on the surface of the PVC floor through a brush cylinder with brush filaments, the brush filaments are easily detached and attached to the floor surface, generating new impurities, resulting in indentations after pressing and affecting the finished product quality. Second, when adjusting the height, it uses a threaded screw to adjust the height of the pressing cylinder. It is easy to move when locking and loosening, resulting in inaccurate adjustment. And ordinary threads cannot withstand long-term forces, that is, under the long-term action of the reverse force of the material during pressing, the threads will deform, resulting in inability to rotate. In view of this, it is necessary to further improve and optimize the dust removal structure and the pressing cylinder height adjustment structure of the PVC floor board pressing and forming machine to improve the production quality and processing accuracy. Summary of the Invention

[0004] (1) Technical problems to be solved

[0005] In view of the deficiencies of the prior art, the present invention provides a PVC floor board pressing and forming machine, which solves the problems that when the prior art forming machine uses a brush barrel with brush filaments to remove impurities on the surface of the PVC floor, the brush filaments are very easy to fall off and adhere to the floor surface, generating new debris, resulting in indentations after pressing and affecting the quality of the finished product, and when adjusting the height, the prior art forming machine uses a threaded screw to adjust the height of the pressing cylinder, which is easy to move when locking and loosening, resulting in inaccurate adjustment, and ordinary threads cannot withstand long-term forces, that is, the reverse acting force of the material during pressing will cause the threads to deform over a long time, resulting in the problem of inability to rotate.

[0006] (2) Technical solutions

[0007] To achieve the above objectives, the present invention is realized through the following technical solutions: A PVC floor board pressing and forming machine includes a conveyor frame and a controller; on the upper wall of the conveyor frame, a second bracket and a first bracket are fixedly connected in sequence from left to right. A dust suction structure for adsorbing and removing impurities on the upper surface of the conveyor frame is arranged on the first bracket. On the inner lower wall of the conveyor frame, a negative pressure pump and a negative pressure box are arranged in sequence from left to right. The negative pressure pump and the negative pressure box are connected through a second air pipe. A filtering structure is arranged in the negative pressure box. A maintenance door for conveniently cleaning the filtering structure is rotatably connected to the front wall of the negative pressure box. The negative pressure box is fixedly connected to the dust suction structure through a first air pipe. Long circular holes that penetrate from front to back are arranged on the front and rear walls of the second bracket. A set of support shafts are respectively slidably connected to the inner side walls of the two long circular holes. A pressing cylinder for pressing the PVC floor board is fixedly connected between the opposite ends of the two support shafts. The opposite ends of the two support shafts respectively penetrate through the two long circular holes and extend to the front and rear sides of the second bracket. A set of rotating sleeves are respectively rotatably connected to the ends of the two support shafts extending to the front and rear sides of the second bracket. An elastic structure for jacking up the support shafts is arranged between the rotating sleeve and the conveyor frame. Second sliding rods are fixedly connected to the upper walls of the two rotating sleeves. A clutch structure for controlling the movement state of the support shafts is arranged between the second sliding rods and the second bracket. The common end of the two second sliding rods away from the rotating sleeve is fixedly connected to a pressing plate. A guiding structure for maintaining the stability of the up and down movement of the pressing plate is arranged between the pressing plate and the second bracket. The second bracket is fixedly connected to a top plate through four connecting columns. The top view projection of the top plate coincides with the pressing plate. A protective cover is fixedly connected to the end of the top plate facing the pressing plate. A driving component for driving the pressing plate to move downward is arranged between the top plate and the pressing plate and inside the protective cover.

[0008] Preferably, the dust suction structure includes a connecting pipe and a dust hood, the connecting pipe is arranged through the upper wall of the first bracket, the connecting pipe and the first bracket are fixed in position by hand screws, the dust hood is fixedly connected to the lower end of the connecting pipe, the front and rear ends of the dust hood are respectively slidably connected to the inner front wall and the inner rear wall of the first bracket, and the dust hood is provided with a dust suction port that penetrates the lower wall of the dust hood.

[0009] Preferably, a through hole is provided inside the connecting pipe, the dust suction port is communicated with the through hole, and one end of the connecting pipe away from the dust suction hood is fixedly connected to one end of the first air pipe away from the negative pressure box.

[0010] Preferably, the filtering structure is a dust removal bag, and the dust removal bag is fixedly connected to the inner right wall of the negative pressure box and is connected to the first air pipe.

[0011] Preferably, the elastic structure includes two groups of support seats, a first sliding rod, and a spring. The two groups of support seats are respectively fixedly connected to the front wall and the rear wall of the conveying frame, and the two groups of support seats are respectively located at the front and rear sides of the second bracket. The two groups of the first sliding rods are respectively fixedly connected to the ends of the two groups of rotating sleeves away from the second sliding rods, and the ends of the two groups of the first sliding rods away from the rotating sleeves respectively pass through the inner walls of the two groups of support seats. The two groups of springs are respectively sleeved on the outer walls of the first sliding rods and are both located between the support seats and the rotating sleeves.

[0012] Preferably, the clutch structure includes two groups of electromagnetic clutches, which are respectively fixedly connected to the front wall and the rear wall of the second bracket through a group of fixing seats, and the two groups of electromagnetic clutches are respectively located above the two groups of oblong holes, and the two groups of the second sliding rods are located on the outer wall between the pressure plate and the rotating sleeve, respectively passing through a group of electromagnetic clutches and being slidably connected thereto.

[0013] Preferably, the guide structure includes three groups of guide rods, which are distributed front to back and fixedly connected to the lower wall of the pressure plate in sequence, and the ends of the three groups of guide rods away from the pressure plate all penetrate the upper wall of the second bracket and are slidably connected thereto.

[0014] Preferably, the driving assembly includes a dual-axis motor, two groups of rotating seats, two groups of rotating shafts and two groups of toggle blocks, the dual-axis motor is fixedly connected to the lower wall of the top plate and is located in the front and rear center position, the two groups of rotating seats are fixedly connected to the lower wall of the top plate and are respectively close to the inner front wall and the inner rear wall of the protective cover, the two groups of rotating shafts are respectively fixedly connected to the two protruding shaft ends of the dual-axis motor through a group of couplings, the ends of the two groups of rotating shafts away from the dual-axis motor respectively pass through the two groups of rotating seats and are rotatably connected thereto, the two groups of toggle blocks are respectively fixedly connected to the outer walls of the two groups of rotating shafts and are both located between the dual-axis motor and the rotating seat, the front view cross-sectional profile of the two groups of toggle blocks is involute-shaped and the outer walls of the toggle blocks abut against the upper wall of the pressure plate.

[0015] (III) Beneficial effects

[0016] The present invention provides a PVC floor board pressing and forming machine, which has the following beneficial effects:

[0017] 1. Compared with the existing technology, the PVC floor board pressing and forming machine is connected to a common encoder on the market on the dual-axis motor, and the start of the dual-axis motor is controlled by a controller. The rotation of the dual-axis motor drives the rotating shaft and the toggle block to rotate. The involute outer contour of the toggle block abuts against the pressing plate, and the spring is squeezed to drive the pressing plate and the pressing cylinder to rise and fall according to a predetermined distance, thereby achieving the purpose of accurately adjusting the height of the pressing cylinder with high adjustment accuracy.

[0018] 2. Compared with the existing technology, the PVC floor board pressing and forming machine can keep the position of the pressing cylinder unchanged during the pressing process by braking the second sliding rod through the electromagnetic clutch. At the same time, when the height needs to be adjusted, the electromagnetic clutch is powered off and separated, so that the second sliding rod can be slidably connected with the electromagnetic clutch to facilitate the adjustment of the height.

[0019] 3. Compared with the existing technology, the PVC floor board pressing and forming machine forms negative pressure in the negative pressure box through a negative pressure pump before pressing. The negative pressure in the negative pressure box adsorbs and removes impurities on the surface of the board through the first air pipe, the connecting pipe and the dust suction port. The impurity removal effect is good, and the sucked away debris is intercepted by the dust removal bag, which will not cause secondary pollution to the working environment. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] Figure 1 It is a schematic diagram of the overall structure of the present invention;

[0021] Figure 2 For the present invention Figure 1 A partial enlarged view of the middle A;

[0022] Figure 3 This is a schematic diagram of the internal structure of the negative pressure box of the present invention;

[0023] Figure 4 It is a partial cross-sectional view of the internal structure of the dust hood of the present invention;

[0024] Figure 5 It is a partial sectional view of the inner structure of the protective cover of the present invention;

[0025] Figure 6 This is a front view structural diagram of the toggle block of the present invention.

[0026] Among them, 1. Conveyor frame; 2. First bracket; 3. Connecting pipe; 4. Hand-tightening screw; 5. Dust suction hood; 6. First air pipe; 7. Negative pressure box; 8. Maintenance door; 9. Second air pipe; 10. Negative pressure pump; 11. Second bracket; 12. Long circular hole; 13. Pressing cylinder; 14. Support seat; 15. First sliding rod; 16. Rotating sleeve; 17. Spring; 18. Second sliding rod; 19. Fixed seat; 20. Electromagnetic clutch; 21. Pressing plate; 22. Connecting column; 23. Top plate; 24. Protective cover; 25. Guide rod; 26. Dust removal cloth bag; 27. Dust suction port; 28. Rotating seat; 29. Rotating shaft; 30. Poking block; 31. Biaxial motor; 32. Support shaft. Specific implementation mode

[0027] The following will clearly and completely describe the technical solutions in the embodiments of the present invention with reference to the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only a part of the embodiments of the present invention, rather than all the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those of ordinary skill in the art without creative work shall fall within the protection scope of the present invention.

[0028] Embodiment:

[0029] As Figures 1 to 6 shown, the embodiment of the present invention provides a PVC floor board pressing and forming machine, including a conveyor frame 1 and a controller. The controller is a common microcomputer controller on the market, and its main purpose is to control the conveying action of the conveyor frame 1, the action of the driving component, and the opening and closing action of the negative pressure pump 10;

[0030] On the upper wall of the conveyor frame 1, a second bracket 11 and a first bracket 2 are fixedly connected in sequence from left to right. A dust suction structure for adsorbing and removing impurities from the upper surface of the conveyor frame 1 is arranged on the first bracket 2. The dust suction structure includes a connecting pipe 3 and a dust suction hood 5. The connecting pipe 3 is arranged through the upper wall of the first bracket 2. The position of the connecting pipe 3 and the first bracket 2 is fixed by a hand-tightening screw 4. The dust suction hood 5 is fixedly connected to the lower end of the connecting pipe 3. The front and rear ends of the dust suction hood 5 are respectively slidably connected to the inner front wall and the inner rear wall of the first bracket 2. A dust suction port 27 communicating with the lower wall of the dust suction hood 5 is arranged inside the dust suction hood 5. A through hole is arranged inside the connecting pipe 3, and the dust suction port 27 communicates with the through hole. One end of the connecting pipe 3 away from the dust suction hood 5 is fixedly connected to one end of the first air pipe 6 away from the negative pressure box 7. During operation, the board is fed from the right end of the conveyor frame 1. When passing under the first bracket 2, the dust suction port 27 adsorbs and removes impurities from the surface of the board through the negative pressure generated by the negative pressure pump 10. By loosening the hand-tightening screw 4, the height range between the dust suction hood 5 and the board surface can be adjusted so as to adjust to the most suitable position;

[0031] A negative pressure pump 10 and a negative pressure box 7 are arranged on the lower inner wall of the conveying rack 1 from left to right. The negative pressure pump 10 and the negative pressure box 7 are connected by a second air pipe 9. A filtering structure is arranged in the negative pressure box 7. A maintenance door 8 for convenient cleaning of the filtering structure is rotatably connected to the front wall of the negative pressure box 7. The negative pressure box 7 is fixedly connected to the dust suction structure by a first air pipe 6. The filtering structure is a dust bag 26. The dust bag 26 is fixedly connected to the right inner wall of the negative pressure box 7 and is connected to the first air pipe 6. Impurities on the surface of the plate are adsorbed into the negative pressure box 7 and are intercepted and filtered by the dust bag 26. The filtered air is discharged back into the room, which can avoid the impurities sucked away from being discharged again to affect the working environment.

[0032] The front wall and the rear wall of the second bracket 11 are both provided with oblong holes 12 that pass through from front to back. A group of support shafts 32 are slidably connected to the inner side walls of the two groups of oblong holes 12 respectively. A pressing cylinder 13 for pressing the PVC floor board is fixedly connected between the opposite ends of the two groups of support shafts 32. The opposite ends of the two groups of support shafts 32 respectively penetrate the two groups of oblong holes 12 and extend to the front and rear sides of the second bracket 11 respectively. The ends of the two groups of support shafts 32 extending to the front and rear sides of the second bracket 11 are rotatably connected with a group of rotating sleeves 16 respectively. An elastic structure for lifting the support shaft 32 is provided between the rotating sleeve 16 and the conveying frame 1. The elastic structure includes two groups of support seats 14, a first sliding rod 15, and an elastic spring 13. Spring 17, two groups of support seats 14 are respectively fixedly connected to the front wall and the rear wall of the conveying frame 1, and the two groups of support seats 14 are respectively located at the front and rear sides of the second bracket 11, and the two groups of first slide bars 15 are respectively fixedly connected to the ends of the two groups of rotating sleeves 16 away from the second slide bar 18, and the ends of the two groups of first slide bars 15 away from the rotating sleeve 16 respectively penetrate the inner walls of the two groups of support seats 14, and the two groups of springs 17 are respectively sleeved on the outer walls of the first slide bars 15 and are both located between the support seats 14 and the rotating sleeve 16. The main function of the spring 17 is to push the pressing cylinder 13 upward, because the involute outer contour of the toggle block 30 only has the ability to press the pressing cylinder 13 downward, so it is necessary to set the spring 17 to cooperate with the toggle block 30 for use;

[0033] The upper walls of the two sets of rotating sleeves 16 are fixedly connected with second sliding rods 18. A clutch structure for controlling the moving state of the support shaft 32 is arranged between the second sliding rods 18 and the second bracket 11. The clutch structure includes two electromagnetic clutches 20. The two electromagnetic clutches 20 are respectively fixedly connected to the front wall and the rear wall of the second bracket 11 through a set of fixed seats 19. The two electromagnetic clutches 20 are respectively located above the two long round holes 12. The outer walls of the two second sliding rods 18 between the pressing plate 21 and the rotating sleeve 16 respectively penetrate through a set of electromagnetic clutches 20 and are slidably connected therewith. The electromagnetic clutch 20 is a common braking element on the market. When the height of the pressing cylinder 13 needs to be adjusted, the electromagnetic clutch 20 is powered off, losing the braking restraint on the second sliding rod 18. At this time, the second sliding rod 18 can slide up and down. After the height of the pressing cylinder 13 is adjusted, the controller controls the electromagnetic clutch 20 to be powered on to generate braking force to brake the second sliding rod 18. This process will not cause the pressing cylinder 13 to move up or down, so the accuracy of height adjustment is ensured, and the pressing cylinder 13 is maintained at a fixed height during the subsequent pressing process, greatly improving the processing accuracy;

[0034] The ends of the two second sliding rods 18 far away from the rotating sleeve 16 are fixedly connected together with a pressing plate 21. A guiding structure for maintaining the stability of the pressing plate 21 during its up and down movement is arranged between the pressing plate 21 and the second bracket 11. The guiding structure includes three guiding rods 25. The three guiding rods 25 are distributed in the front and rear and are successively fixedly connected to the lower wall of the pressing plate 21. The ends of the three guiding rods 25 far away from the pressing plate 21 all penetrate through the upper wall of the second bracket 11 and are slidably connected therewith. The stability of the pressing plate 21 during its up and down movement can be maintained through the three guiding rods 25;

[0035] A top plate 23 is fixedly connected to the top of the second bracket 11 through four groups of connecting columns 22. The top plate 23 overlaps with the pressure plate 21 when viewed from above. A protective cover 24 is fixedly connected to one end of the top plate 23 facing the pressure plate 21. A driving component for driving the pressure plate 21 to move downward is arranged between the top plate 23 and the pressure plate 21 and on the inner side of the protective cover 24. The driving component includes a double-axis motor 31, two groups of rotating seats 28, two groups of rotating shafts 29 and two groups of toggle blocks 30. The double-axis motor 31 is fixedly connected to the lower wall of the top plate 23 and is located in the middle of the front and rear. The two groups of rotating seats 28 are fixedly connected to the lower wall of the top plate 23 and are close to the inner front wall and the inner rear wall of the protective cover 24 respectively. The two groups of rotating shafts 29 They are fixedly connected to the two protruding shaft ends of the dual-axis motor 31 through a set of couplings respectively, and the ends of the two sets of rotating shafts 29 away from the dual-axis motor 31 respectively penetrate the two sets of rotating seats 28 and are rotatably connected thereto, and the two sets of toggle blocks 30 are fixedly connected to the outer walls of the two sets of rotating shafts 29 respectively and are both located between the dual-axis motor 31 and the rotating seat 28. The front view cross-sectional profiles of the two sets of toggle blocks 30 are involute-shaped and the outer walls of the toggle blocks 30 abut against the upper wall of the pressure plate 21. When adjusting the height, the rotation angle of the dual-axis motor 31 is controlled by the controller in conjunction with the common encoder on the market, and the height of the pressure plate 21 abutting against the toggle blocks 30 is adjusted by rotating the toggle blocks 30 to a specific angle.

[0036] Working principle: During operation, the plate is fed in from the right end of the conveyor rack 1. When it passes under the first bracket 2, the vacuum port 27 uses the negative pressure generated by the negative pressure pump 10 to absorb and remove impurities from the surface of the plate. By loosening the hand screw 4, the height range of the dust hood 5 from the surface of the plate can be adjusted to adjust to the most suitable position. The impurities on the surface of the plate are absorbed into the negative pressure box 7 and intercepted and filtered by the dust bag 26. The filtered air is discharged back into the room to avoid the impurities sucked away from being discharged again to affect the working environment. The main function of the spring 17 is to push the pressure cylinder 13 upward. Because the involute outer contour of the toggle block 30 only has the ability to press the pressure cylinder 13 downward, the spring 17 needs to be set to cooperate with the toggle block 30. The electromagnetic clutch 20 is commercially available. The common braking element on the surface, when it is necessary to adjust the height of the pressing cylinder 13, the electromagnetic clutch 20 is powered off, and the braking constraint on the second slide bar 18 is lost. At this time, the second slide bar 18 can slide up and down. When the height adjustment of the pressing cylinder 13 is completed, the electromagnetic clutch 20 is controlled by the controller to energize to generate braking force to brake the second slide bar 18. This process will not cause the pressing cylinder 13 to move up or down, so the accuracy of height adjustment is ensured, and the pressing cylinder 13 is kept at a fixed height during the subsequent pressing process, which greatly improves the processing accuracy. When adjusting the height, the controller cooperates with the common encoder on the market to control the rotation angle of the dual-axis motor 31, and the height of the pressure plate 21 abutting against the toggle block 30 is adjusted by rotating the toggle block 30 to a specific angle.

[0037] Although embodiments of the present invention have been shown and described, it will be understood by those of ordinary skill in the art that various changes, modifications, substitutions and variations can be made to these embodiments without departing from the principles and spirit of the present invention, and the scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. A PVC floor board pressing and forming machine, comprising a conveying frame (1) and a controller; characterized in that: On the upper wall of the conveyor frame (1), a second support (11) and a first support (2) are fixedly connected in sequence from left to right. A dust suction structure for adsorbing and removing impurities from the upper surface of the conveyor frame (1) is arranged on the first support (2). On the inner lower wall of the conveyor frame (1), a negative pressure pump (10) and a negative pressure box (7) are arranged in sequence from left to right. The negative pressure pump (10) and the negative pressure box (7) are connected through a second air pipe (9). A filtering structure is arranged in the negative pressure box (7). A maintenance door (8) for facilitating the cleaning of the filtering structure is rotatably connected to the front wall of the negative pressure box (7). The negative pressure box (7) is fixedly connected to the dust suction structure through a first air pipe (6). Long circular holes (12) that penetrate from front to back are arranged on the front wall and the rear wall of the second support (11). A set of support shafts (32) are slidably connected to the inner side walls of the two sets of long circular holes (12) respectively. A pressing cylinder (13) for pressing the PVC floor board is fixedly connected between the opposite ends of the two sets of support shafts (32). The opposite ends of the two sets of support shafts (32) respectively penetrate through the two sets of long circular holes (12) and extend to the front and rear sides of the second support (11). A set of rotating sleeves (16) are respectively rotatably connected to the ends of the two sets of support shafts (32) extending to the front and rear sides of the second support (11). An elastic structure for jacking up the support shaft (32) is arranged between the rotating sleeve (16) and the conveyor frame (1). Second sliding rods (18) are fixedly connected to the upper walls of the two sets of rotating sleeves (16). A clutch structure for controlling the moving state of the support shaft (32) is arranged between the second sliding rod (18) and the second support (11). The ends of the two sets of second sliding rods (18) far from the rotating sleeve (16) are fixedly connected together with a pressing plate (21). A guiding structure for maintaining the stability of the pressing plate (21) during its up and down movement is arranged between the pressing plate (21) and the second support (11). Above the second support (11), a top plate (23) is fixedly connected through four connecting columns (22). The top view projection of the top plate (23) coincides with the pressing plate (21). A protective cover (24) is fixedly connected to the end of the top plate (23) facing the pressing plate (21). A driving component for driving the pressing plate (21) to move downward is arranged between the top plate (23) and the pressing plate (21) and inside the protective cover (24).

2. The PVC floor board pressing and forming machine according to claim 1, wherein: The dust suction structure includes a connecting pipe (3) and a dust suction hood (5). The connecting pipe (3) is arranged through the upper wall of the first support (2). The position of the connecting pipe (3) is fixed to the first support (2) through a hand-tightening screw (4). The dust suction hood (5) is fixedly connected to the lower end of the connecting pipe (3). The front and rear ends of the dust suction hood (5) are respectively slidably connected to the inner front wall and the inner rear wall of the first support (2). A dust suction port (27) that penetrates the lower wall of the dust suction hood (5) is arranged inside the dust suction hood (5).

3. The PVC floor board pressing and forming machine according to claim 2, characterized in that: A through hole is arranged inside the connecting pipe (3). The dust suction port (27) is connected to the through hole. The end of the connecting pipe (3) far from the dust suction hood (5) is fixedly connected to the end of the first air pipe (6) far from the negative pressure box (7).

4. The PVC floor board pressing and forming machine according to claim 3, characterized in that: The filtering structure is a dust removal bag (26), and the dust removal bag (26) is fixedly connected to the inner right wall of the negative pressure box (7) and is connected to the first air pipe (6).

5. The PVC floor board pressing and forming machine according to claim 4, characterized in that: The elastic structure comprises two groups of support seats (14), a first slide bar (15), and a spring (17). The two groups of support seats (14) are respectively fixedly connected to the front wall and the rear wall of the conveying frame (1). The two groups of support seats (14) are respectively located at the front side and the rear side of the second bracket (11). The two groups of the first slide bars (15) are respectively fixedly connected to one end of the two groups of rotating sleeves (16) away from the second slide bar (18). The ends of the two groups of the first slide bars (15) away from the rotating sleeve (16) respectively penetrate the inner walls of the two groups of support seats (14). The two groups of springs (17) are respectively sleeved on the outer walls of the first slide bars (15) and are both located between the support seats (14) and the rotating sleeve (16).

6. The PVC floor board pressing and forming machine according to claim 5, characterized in that: The clutch structure comprises two groups of electromagnetic clutches (20), the two groups of electromagnetic clutches (20) are respectively fixedly connected to the front wall and the rear wall of the second bracket (11) through a group of fixing seats (19), the two groups of electromagnetic clutches (20) are respectively located above the two groups of oblong holes (12), and the outer walls of the two groups of the second sliding rods (18) located between the pressure plate (21) and the rotating sleeve (16) respectively penetrate a group of electromagnetic clutches (20) and are slidably connected thereto.

7. The PVC floor board pressing and forming machine according to claim 6, characterized in that: The guide structure comprises three groups of guide rods (25), the three groups of guide rods (25) are distributed front and back and are fixedly connected to the lower wall of the pressure plate (21) in sequence, and the ends of the three groups of guide rods (25) away from the pressure plate (21) all penetrate the upper wall of the second bracket (11) and are slidably connected thereto.

8. The PVC floor board pressing and forming machine according to claim 7, characterized in that: The driving assembly comprises a double-axis motor (31), two groups of rotating seats (28), two groups of rotating shafts (29) and two groups of toggle blocks (30); the double-axis motor (31) is fixedly connected to the lower wall of the top plate (23) and is located in the middle of the front and rear; the two groups of rotating seats (28) are fixedly connected to the lower wall of the top plate (23) and are respectively close to the inner front wall and the inner rear wall of the protective cover (24); the two groups of rotating shafts (29) are respectively fixedly connected to the double-axis motor (31) through a group of couplings. The motor (31) has two extended shaft ends, and one end of the two sets of rotating shafts (29) away from the dual-axis motor (31) respectively passes through the two sets of rotating seats (28) and is rotatably connected thereto. The two sets of shifting blocks (30) are respectively fixedly connected to the outer walls of the two sets of rotating shafts (29) and are both located between the dual-axis motor (31) and the rotating seat (28). The front view cross-sectional profile of the two sets of shifting blocks (30) is involute-shaped and the outer wall of the shifting block (30) abuts against the upper wall of the pressure plate (21).

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