PVC foam board calendering device and working method thereof

Abstract

The invention relates to the technical field of PVC foam board calendaring, in particular to a PVC foam board calendaring device and a working method thereof.The PVC foam board calendaring device comprises a bottom plate, a working table is fixedly installed in the middle of the upper end face of the bottom plate, supporting frames fixed to the bottom plate are symmetrically installed on the two sides of the working table, and telescopic plates are fixedly installed at the lower ends of the middles of the supporting frames; when the whole press polish unit moves downwards, one end of the warping plate moves downwards along with the connecting frame, at the moment, the other end of the warping plate warps upwards to drive the piston rod to move upwards, and when the piston rod moves upwards, gas is sucked through the gas conveying pipe; when the press polish unit moves upwards, air in an air cylinder blows air to the foam board on the working table through an air conveying pipe and the air holes, on one hand, the situation that the foam board adheres to the working table, and pushing of the foam board is not convenient can be avoided; on the other hand, the bottom of the foaming plate can be cooled.

Description

Technical Field

[0001] The invention relates to the technical field of PVC foam board calendering, in particular to a PVC foam board calendering device and a working method thereof. Background Art

[0002] PVC foam board is also called Chevron board, Andy board, and foam polyvinyl chloride board. It is widely used in commercial decorative frames, advertising signs, and display boards.

[0003] When ordinary PVC foam board is calendered, due to its poor surface adhesion, in order to prevent the friction between the sweeping roller and the material from sticking to the calendering roller, a layer of oil or release agent will be applied to the calendering roller.

[0004] The prior art discloses a Chinese patent with application number CN202222316958.4, a PVC foam board calendering and shaping device, and discloses that a flattening frame belt and a flattening conveyor belt apply pressure to the foam board, thereby flattening the surface of the foam board during the conveyance process of the foam board, thereby improving the flattening work efficiency of the utility model.

[0005] Although the above device can complete the pressure on the foaming board, there are still some defects in use:

[0006] 1. When calendering the PVC crust foam board, the roller can be directly pressed. However, the ordinary PVC calendered board needs to be painted because of its poor adhesion and easy peeling during calendering. The above device cannot flexibly select the calendering operation according to the type of foam board;

[0007] 2. When calendering the foam board, in order to maintain the stability of the calendering, the foam board needs to be fixed first. The existing device cannot automatically fix the foam board by calendering the foam board, and after calendering, the high temperature and pressure can easily cause the foam board to stick together, which makes it inconvenient to push and feed the foam board. Summary of the invention

[0008] The object of the present invention is to provide a PVC foam board calendering device and a working method thereof, so as to solve the problems of selectively oiling the foam board and fixing the foam board during calendering proposed in the above background technology.

[0009] The purpose of the present invention can be achieved by the following technical solutions:

[0010] A PVC foamed board calendering device, comprising a bottom plate. In the middle of the upper end surface of the bottom plate, an operating table is fixedly installed. On both sides of the operating table, support frames fixed to the bottom plate are symmetrically installed. At the lower part in the middle of the support frames, telescopic plates are fixedly installed. Between the two telescopic plates, a calendering unit is jointly installed. On the front and rear sides of the operating table, two pairs of symmetric cylinders are installed. Between the two cylinders on the front side, a front side support plate is jointly installed. Between the two cylinders on the rear side, a rear side support plate is jointly installed. Below the rear side support plate, there are two symmetric side plates connected to the bottom plate. On both side plates, push rods are installed. Between the two push rods, a push plate is jointly installed. Between the left and right sides of the operating table and the calendering unit, a stabilizing unit for adsorbing the foamed board during calendering is jointly installed. In the calendering unit, a cooling unit is provided.

[0011] The calendering unit includes two symmetrically arranged guide frames. On the side edges of the two guide frames, a connecting frame is jointly installed. In the middle of the connecting frame, a feeding box is fixedly installed. In the middle of the two guide frames, two groups of symmetrically arranged moving frames are slidably installed. Between each group of moving frames, a storage box is jointly installed. Both storage boxes are jointly installed with a conveying pipe to the feeding box on their adjacent side. On one side in the middle of the two guide frames, symmetrically arranged driving wheels are rotatably installed through a motor. Above and below the driving wheels, there are tooth plates sliding with the guide frames. On both the upper and lower tooth plates, connecting blocks are installed. The two connecting blocks are arranged in a front-back staggered manner. The ends of the two connecting blocks far from the tooth plates are respectively connected to the corresponding storage boxes.

[0012] On the inner walls of both sides of the storage box, moving grooves are opened. In the moving grooves, moving plates are slidably installed through electric sliders. Between the moving plates on both sides, a sponge is jointly installed. Between the sponge and the cavity in the middle of the moving groove, a telescopic pipe is jointly installed. In the telescopic pipe, a sealing plug is provided. On one side of the upper end surface of the sealing plug, an inner plate is fixedly installed.

[0013] In the middle of the lower side of the storage box, a pressure roller is rotatably installed. At the coaxial position on one side of the pressure roller, a cam is fixedly installed. On one side of the storage box, a vertical groove is opened. In the vertical groove, a lifting plate connected to the inner plate is slidably installed. In the middle of the lower end surface of the lifting plate, an electric push plate is fixedly installed. At one end of the electric push plate, an abutting plate is fixedly installed. One end of the abutting plate is arc-shaped. The abutting plate penetrates and slides in a through groove opened in the middle of the storage box.

[0014] The cooling unit includes two groups of side grooves symmetrically arranged on both sides of the storage box. In each group of side grooves, a side box located on the side of the storage box is jointly slidably installed. Between the side box and the side groove, a spring is jointly installed. In the inner cavity of the side box, two symmetrically arranged water tanks are fixedly installed. Between the two water tanks, two bellows arranged up and down are jointly installed. On the lower end surface of the side box, a conduction box communicated with the two water tanks is fixedly installed. On the lower inner side of the side box, a blower is fixedly installed. Below the blower, there are multiple air ducts.

[0015] In the middle of the side of the side box away from the storage box, a cylinder is fixedly installed. A moving rod is slidably installed in the cylinder. A contact ring is fixedly installed on the lower end surface of the moving rod. A spring is sleeved outside the moving rod. One end of the moving rod away from the contact ring is fixedly installed with a first solenoid valve. A second solenoid valve fixed to the top of the inner cavity of the cylinder is arranged on the top of the first solenoid valve. When the first solenoid valve contacts the second solenoid valve, it is used to control the blower to start blowing air.

[0016] The stabilizing unit includes two groups of ear plates symmetrically installed on the workbench. A rocker is rotatably installed in the middle of each group of ear plates. An air cylinder fixed to the workbench is arranged below the rocker. A piston rod is slidably installed in the middle of the air cylinder. A plurality of air holes are opened on the workbench. An air delivery pipe communicated with the air holes is fixedly installed on the lower end surface of the piston rod. One end of the rocker is hinged to the top of the piston rod and the other end is hinged to the connecting frame.

[0017] Grooves are opened at the four corners of the upper end surface of the workbench. A pull rod penetrating through the side of the workbench is slidably installed in the groove. A limiting plate sliding in the groove is fixedly installed at one end of the pull rod. A spring is sleeved outside the pull rod. A pressing plate is slidably installed in the middle of the limiting plate.

[0018] The lowest end of the pressure roller is lower than the lowest end of the guide frame. When the pressure roller rotates, the cam intermittently jacks up the abutting plate so that the raw materials in the storage box are automatically injected into the sponge.

[0019] Another object of the present invention is to provide a method for using a calendering device for PVC foamed boards, including the following steps:

[0020] S1: Selective oiling of PVC foamed boards:

[0021] Place the foamed board on the workbench. According to the type of PVC foamed board, choose whether to oil it. When calendering ordinary PVC foamed boards, first start the electric slider to drive the moving plate to move down in the moving groove until the sponge is closely attached to the pressure roller. Then start the electric push plate to push down until the arc section of the abutting plate contacts the cam for oiling when calendering the PVC foamed board subsequently.

[0022] S2: Calendering of PVC foamed boards:

[0023] Control the push-down of the telescopic plate to move the entire calendering unit downward until the pressure roller presses the PVC foam board. Then, start the pressure roller to calender and shape the surface of the PVC foam board. At this time, start the motor to drive the driving wheel to rotate. When the driving wheel rotates, it drives two pressure rollers to move through the movement of two toothed plates respectively. When the pressure rollers move on the PVC foam board, friction is generated between the pressure rollers and the PVC foam board, causing the pressure rollers to rotate. When the pressure rollers rotate, they synchronously drive the cams to rotate. When the cams rotate, they intermittently squeeze the abutting plate, causing the lifting plate to move upward. When the lifting plate moves upward, it drives the sealing plug to remove the blockage of the telescopic tube, so that the paint in the storage tank is added to the sponge. When the pressure rollers rotate, they constantly contact the sponge, so that the paint is applied to the pressure rollers.

[0024] S3: Adsorption of PVC foam board:

[0025] When the entire calendering unit moves downward, one end of the seesaw moves downward along with the connecting frame and turns downward. When the seesaw tilts downward, the other end of it moves upward. At this time, it synchronously drives the piston rod to suck upward in the air cylinder, so that the negative pressure in multiple air holes stably adsorbs the PVC foam board, thus ensuring stability during calendering. When the entire calendering unit moves upward, one end of the seesaw connected to the connecting frame lifts upward, and the other end of the seesaw presses the piston rod downward. At this time, the gas in the air cylinder is compressed and transported through the air delivery pipe to the air holes, and finally the air holes blow the calendered PVC foam board, so as to prevent the PVC foam board from sticking to the workbench after calendering.

[0026] Advantages of the present invention:

[0027] 1. When the entire calendering unit moves downward in the present invention, one end of the seesaw follows the connecting frame and moves downward. At this time, the other end of the seesaw tilts upward and drives the piston rod to move upward. When the piston rod moves upward, it sucks gas through the air delivery pipe. At this time, the foam board is stably adsorbed on the workbench through the air holes. When the calendering unit moves upward, one end of the seesaw connected to the connecting frame lifts upward. At this time, the other end of the seesaw drives the piston rod to compress downward in the air cylinder. At this time, the gas in the air cylinder blows the foam board on the workbench through the air delivery pipe and the air holes. On the one hand, it can prevent the foam board from sticking to the workbench and being inconvenient to push the foam board. On the other hand, it can also dissipate heat from the bottom of the foam board. Compared with the existing calendering unit, the present invention can stably adsorb the foam board by using the downward movement during the calendering of the foam board. At the same time, when the calendering unit moves upward, it blows and dissipates heat from the bottom of the foam board to avoid sticking to the workbench.

[0028] 2. The present invention drives the driving wheel to rotate by starting the motor. When the driving wheel rotates, it drives the upper and lower toothed plates to slide closer to or away from each other through meshing. When the two toothed plates slide, they respectively drive the two storage bins to move closer to or away from each other synchronously through the two connecting blocks connected to them. At this time, the pressure rollers are started. Since the telescopic plate moves downward to drive the pressure rollers in the storage bins to press the PVC foam board on the working table, when the two storage bins move, the pressure rollers at their lower parts rotate continuously when sliding on the surface of the PVC foam board, thereby realizing the rotary calendering and shaping of the surface of the PVC foam board. Compared with the existing calendering device, when the present invention calenders the foam board in a rotary manner, through the mutual approach and separation between the two storage bins, it can meet the calendering of PVC foam boards with different widths. And compared with the one-piece calendering at a fixed position, the two storage bins drive the pressure rollers to move continuously, so that the surface of the PVC foam board is evenly calendered, and it can also effectively prevent the problem of the board surface turning yellow due to excessive local temperature of the foam board.

[0029] 3. When the present invention calenders an ordinary PVC foam board, to reduce the friction with the pressure roller and prevent the material from adhering to the pressure roller, oil will be applied to the pressure roller. At this time, the electric push plate is started to push downward to drive the abutting plate to contact the cam. Subsequently, the electric slider is started to drive the moving plate to slide downward. When the moving plate slides downward, it drives the sponge to move downward to contact the pressure roller. When the two storage bins move, friction is generated between the pressure roller and the foam board, causing the pressure roller to rotate. When the pressure roller rotates, it synchronously drives the cam to rotate. When the cam rotates, it intermittently pushes up the abutting plate. When the abutting plate is pushed up, it drives the lifting plate to slide upward in the vertical groove. At this time, the inner plate connected to the lifting plate drives the sealing plug to move upward, canceling the blockage of the telescopic tube. The oil in the storage bin drips into the sponge through the telescopic tube, thereby adding oil to the sponge. When the pressure roller rotates, it continuously contacts the sponge, so that the sponge evenly applies the oil to the outside of the pressure roller, so that when the pressure roller calenders the foam board, it can apply oil to its surface.

[0030] 4. After the calendering unit moves downward, the bottom of the contact ring first contacts the foam board. Therefore, when the calendering unit continues to move downward, the contact ring moves upward under the reaction force of the foam board. At this time, the moving rod synchronously drives the first solenoid valve to move upward. After the first solenoid valve contacts the second solenoid valve, the blower is started, so that the air duct blows air to cool the calendered foam board. The water in the two water tanks circulates with the water in the conduction box, and the conduction box can directly cool the foam board when it contacts the foam board. Description of the Drawings

[0031] To more clearly illustrate the technical solutions in the embodiments of the present invention or the prior art, the following will briefly introduce the drawings required for the description of the embodiments or the prior art. Obviously, for those of ordinary skill in the art, without creative efforts, other drawings can also be obtained based on these drawings;

[0032] Figure 1 is a schematic diagram of the overall structure of the present invention;

[0033] Figure 2 is a schematic diagram of the partial structure of the present invention;

[0034] Figure 3 is a schematic diagram of the structure of the calendering unit of the present invention;

[0035] Figure 4 is a schematic diagram of the structure between the storage bin and the side bin of the present invention;

[0036] Figure 5 is a schematic diagram of the side sectional structure of the storage bin and the side bin of the present invention;

[0037] Figure 6 is a schematic diagram of the side sectional structure of the storage bin of the present invention;

[0038] Figure 7 is a schematic diagram of the inner side sectional view of the storage bin of the present invention;

[0039] Figure 8 is a schematic diagram of the internal structure of the side bin of the present invention;

[0040] Figure 9 is the present invention Figure 2 is an enlarged schematic diagram of part A.

[0041] The reference numerals in the drawings are as follows:

[0042] 1. Bottom plate; 10. Support frame; 11. Telescopic plate; 2. Workbench; 21. Cylinder; 22. Front side support plate; 23. Rear side support plate; 24. Side plate; 25. Push rod; 26. Push plate; 31. Guide frame; 311. Driving wheel; 312. Tooth plate; 313. Connecting block; 32. Connecting frame; 33. Feed box; 34. Delivery pipe; 35. Moving frame; 36. Storage box; 361. Moving trough; 362. Moving plate; 363. Sponge; 364. Telescopic pipe; 365. Sealing plug; 366 , inner plate; 37, pressure roller; 371, cam; 372, vertical groove; 373, lifting plate; 374, electric push plate; 375, abutment plate; 41, side box; 42, water tank; 43, bellows; 44, conduction box; 45, cylinder; 451, contact ring; 452, moving rod; 46, fan; 47, air duct; 51, ear plate; 52, rocker; 53, air cylinder; 54, piston rod; 55, air pipe; 56, air hole; 560, groove; 57, pull rod; 58, limit plate; 59, pressing plate. DETAILED DESCRIPTION

[0043] 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.

[0044] As attached Figure 1-9 As shown, a PVC foam board calendering device comprises a base plate 1, a workbench 2 is fixedly installed in the middle of the upper end surface of the base plate 1, support frames 10 fixed to the base plate 1 are symmetrically installed on both sides of the workbench 2, a telescopic plate 11 is fixedly installed at the lower end of the middle part of the support frame 10, a calendering unit is commonly installed between the two telescopic plates 11, two symmetrical cylinders 21 are installed on the front and back sides of the workbench 2, a front side support plate 22 is commonly installed between the two front cylinders 21, a rear side support plate 23 is commonly installed between the two rear cylinders 21, two symmetrical side plates 24 connected to the base plate 1 are arranged below the rear side support plate 23, pushing rods 25 are installed on the two side plates 24, a pushing plate 26 is commonly installed between the two pushing rods 25, a stabilizing unit for adsorbing the foam board during calendering is commonly installed between the left and right sides of the workbench 2 and the calendering unit, and a cooling unit is arranged in the calendering unit.

[0045] Through the setting of the operating table 2, it can be placed when calendering the PVC foam board. And before starting the push rod 25 to push forward and drive the push plate 26 to move, it can feed forward the placed PVC foam board after partial calendering, so as to carry out continuous calendering of the PVC foam board. By starting the telescopic plate 11 to push downward and drive the whole calendering unit to move downward, the calendering and shaping of the PVC foam board can be realized. The cooling unit arranged in the calendering unit can quickly cool the PVC foam board after calendering, avoiding the continuous high-temperature residue of the local part of the foam board, resulting in the damage of the foam board. The setting of the stabilizing unit can utilize the downward movement of the calendering unit, so that the operating table 2 stably adsorbs the PVC foam board, and blows air on the contact surface between the PVC foam board and the operating table 2 when the calendering unit moves upward. On the one hand, it can assist in cooling the foam board, and on the other hand, it can prevent adhesion between the foam board and the operating table 2. Compared with the existing device, when calendering and shaping the PVC foam board, it can stably adsorb the foam board by the downward movement of the calendering unit. At the same time, when the calendering unit moves upward and cancels the upward movement of calendering the PVC foam board, through the stabilizing unit, the bottom of the PVC foam board can be blown to dissipate heat, assisting in cooling it while avoiding adhesion with the operating table 2, effectively avoiding the situation that the PVC foam board is not easy to move after calendering.

[0046] As shown in the Figure 3 accompanying drawings, the calendering unit includes two symmetrically arranged guide frames 31. A connecting frame 32 is jointly installed on the sides of the two guide frames 31. A feeding box 33 is fixedly installed in the middle of the connecting frame 32. Two groups of symmetrically arranged moving frames 35 are slidably installed in the middle of the two guide frames 31. A storage box 36 is jointly installed between each group of moving frames 35. A conveying pipe 34 is jointly installed between each of the two storage boxes 36 and the feeding box 33 on its adjacent side. On one side of the middle of the two guide frames 31, symmetrically arranged driving wheels 311 are rotatably installed by a motor. The driving wheels 311 are meshed with tooth plates 312 sliding on the guide frames 31 both above and below. Connecting blocks 313 are installed on both the upper and lower tooth plates 312. The two connecting blocks 313 are arranged in a front-back staggered manner. The ends of the two connecting blocks 313 away from the tooth plates 312 are respectively connected to the corresponding storage boxes 36.

[0047] When the device calenders the PVC skin-foaming board, its surface has a high hardness and good scratch resistance. Therefore, there is no need to apply paint to the surface additionally. By starting the motor to drive the driving wheel 311 to rotate, when the driving wheel 311 rotates, it drives the upper and lower two toothed plates 312 to slide closer to or away from each other through meshing. When the two toothed plates 312 slide, they respectively drive the two storage bins 36 to move closer to or away from each other synchronously through the two connecting blocks 313 connected to them. At this time, the calender roller 37 is started. Since the telescopic plate 11 moves downward to drive the calender roller 37 in the storage bin 36 to press the PVC foaming board on the working table 2, when the two storage bins 36 move, the calender roller 37 at their lower part rotates continuously when sliding on the surface of the PVC foaming board, so as to realize the rotational calendering and shaping of the surface of the PVC foaming board. Compared with the existing calendering device, when the present invention calenders the foaming board in a rotational manner, through the mutual approach and separation between the two storage bins 36, it can meet the calendering of PVC foaming boards with different widths. And compared with the one-piece calendering at a fixed position, the two storage bins 36 drive the calender roller 37 to move continuously, so that the surface of the PVC foaming board is evenly calendered, and it can also effectively prevent the problem of the board surface turning yellow due to excessive local temperature of the foaming board.

[0048] As shown in the Figure 4 attachment 6 figures, moving grooves 361 are formed in the inner walls on both sides of the storage bin 36. A moving plate 362 is slidably installed in the moving grooves 361 through electric sliders. A sponge 363 is jointly installed between the two moving plates 362 on both sides. A telescopic tube 364 is jointly installed between the sponge 363 and the cavity in the middle of the moving groove 361. A sealing plug 365 is arranged in the telescopic tube 364. One side of the upper end surface of the sealing plug 365 is fixedly installed with an inner plate 366.

[0049] A calender roller 37 is rotatably installed in the middle of the lower side of the storage bin 36. A cam 371 is fixedly installed at the coaxial position on one side of the calender roller 37. A vertical groove 372 is formed on one side of the storage bin 36. A lifting plate 373 connected to the inner plate 366 is slidably installed in the vertical groove 372. A power push plate 374 is fixedly installed in the middle of the lower end surface of the lifting plate 373. One end of the power push plate 374 is fixedly installed with an abutting plate 375. One end of the abutting plate 375 is arc-shaped. The abutting plate 375 penetrates and slides in the through groove formed in the middle of the storage bin 36.

[0050] When calendering ordinary PVC foamed boards, to reduce friction with the calender roll 37 and prevent materials from adhering to the calender roll 37, oil is applied to the calender roll 37. At this time, the electric push plate 374 is activated to push down, driving the abutting plate 375 into contact with the cam 371. Subsequently, the electric slider is activated to drive the moving plate 362 to slide down. When the moving plate 362 slides down, it drives the sponge 363 to move down until it contacts the calender roll 37. When moving between the two storage bins 36, friction is generated between the calender roll 37 and the foamed board, causing the calender roll 37 to rotate. When the calender roll 37 rotates, it synchronously drives the cam 371 to rotate. When the cam 371 rotates, it intermittently pushes up the abutting plate 375. When the abutting plate 375 is pushed up, it drives the lifting plate 373 to slide up in the vertical groove 372. At this time, the inner plate 366 connected to the lifting plate 373 drives the sealing plug 365 to move up, removing the blockage of the telescopic tube 364. The oil in the storage bin 36 drips into the sponge 363 through the telescopic tube 364, thereby adding oil to the sponge 363. When the calender roll 37 rotates, it continuously contacts the sponge 363, enabling the sponge 363 to evenly apply the oil on the outer surface of the calender roll 37. So that when the calender roll 37 calenders the foamed board, oil is applied to its surface. Compared with the existing calendering device, the present invention can flexibly select whether to apply oil to the surface of the PVC foamed board to be calendered according to the type of the foamed board. By attaching special paint to the surface of the foamed board, it can effectively prevent adhesion between the material and the calender roll 37 during calendering, reduce friction, and automatically add oil to the calender roll 37 by utilizing the rotation of the calender roll 37 itself, without the need for additional manual continuous oiling of the surface of the calender roll 37. Moreover, the uniform contact between the calender roll 37 and the sponge 363 can ensure that the surface of the calender roll 37 is evenly coated with oil.

[0051] As shown in the Figure 5 appendix 6 figures, the temperature reduction unit includes two groups of side grooves symmetrically arranged on both sides of the storage bin 36. A side box 41 located on the side of the storage bin 36 is slidably installed in each group of side grooves. A spring is installed between the side box 41 and the side groove. Two symmetrically arranged water tanks 42 are fixedly installed in the inner cavity of the side box 41. Two bellows 43 arranged vertically are installed between the two water tanks 42. A conduction box 44 communicating with the two water tanks 42 is fixedly installed on the lower end surface of the side box 41. A blower 46 is fixedly installed at the lower inner side of the side box 41. A plurality of air ducts 47 are provided below the blower 46.

[0052] In the middle of the side of the side box 41 away from the storage box 36, a cylinder 45 is fixedly installed. A moving rod 452 is slidably installed in the cylinder 45. A contact ring 451 is fixedly installed on the lower end surface of the moving rod 452. A spring is sleeved outside the moving rod 452. One end of the moving rod 452 away from the contact ring 451 is fixedly installed with a first solenoid valve. There is a second solenoid valve fixed to the top of the inner cavity of the cylinder 45 above the first solenoid valve. When the first solenoid valve contacts the second solenoid valve, it is used to control the blower 46 to start blowing air.

[0053] After the calendering unit moves down, the bottom of the contact ring 451 first contacts the foaming board. Therefore, when the calendering unit continues to move down, the contact ring 451 moves up under the reaction force of the foaming board. At this time, the moving rod 452 synchronously drives the first solenoid valve to move up. After the first solenoid valve contacts the second solenoid valve, the blower 46 is turned on, so that the air duct 47 blows air to cool the calendered foaming board. The water in the two water tanks 42 and the conduction box 44 circulates, and the conduction box 44 can directly cool the foaming board by water when it contacts the foaming board.

[0054] As shown in the appendix Figure 2 、 9 As shown, the stabilizing unit includes two groups of ear plates 51 symmetrically installed on the workbench 2. A rocker 52 is rotatably installed in the middle of each group of ear plates 51. Below the rocker 52, there is an air cylinder 53 fixed to the workbench 2. A piston rod 54 is slidably installed in the middle of the air cylinder 53. A plurality of air holes 56 are opened on the workbench 2. The lower end surface of the piston rod 54 is fixedly installed with an air delivery pipe 55 communicating with the air holes 56. One end of the rocker 52 is hinged to the top of the piston rod 54 and the other end is hinged to the connecting frame 32.

[0055] When the calendering unit moves down as a whole, one end of the rocker 52 follows the connecting frame 32 and moves down. At this time, the other end of the rocker 52 tilts up to drive the piston rod 54 to move up. When the piston rod 54 moves up, it sucks the gas through the air delivery pipe 55. At this time, the foaming board stably adsorbs the foaming board on the workbench 2 through the air holes 56. When the calendering unit moves up, one end of the rocker 52 connected to the connecting frame 32 is lifted. At this time, the other end of the rocker 52 drives the piston rod 54 to compress downward in the air cylinder 53. At this time, the gas in the air cylinder 53 blows air to the foaming board on the workbench 2 through the air delivery pipe 55 and the air holes 56. On the one hand, it can prevent the foaming board from adhering to the workbench and make it inconvenient to push the foaming board. On the other hand, it can also dissipate heat from the bottom of the foaming board. Compared with the existing calendering unit, the present invention can stably adsorb the foaming board by using the downward movement when calendering the foaming board. At the same time, when the calendering unit moves up, it blows air to dissipate heat from the bottom of the foaming board to avoid adhesion to the workbench 2.

[0056] At the four corners of the upper end surface of the working table 2, grooves 560 are provided. A pull rod 57 passing through the side of the working table 2 is slidably installed in the groove 560. One end of the pull rod 57 is fixedly installed with a limiting plate 58 slidably located in the groove 560. A spring is sleeved outside the pull rod 57, and a pressing plate 59 is slidably installed in the middle of the limiting plate 58.

[0057] The lowermost end of the pressure roller 37 is lower than the lowermost end of the guiding frame 31. When the pressure roller 37 rotates, it intermittently jacks up the abutting plate 375 through the cam 371, so that the raw materials in the storage box 36 are automatically injected into the sponge 363.

[0058] Another object of the present invention is to provide a method for using a PVC foam board calendering device, including the following steps:

[0059] S1: Selective oiling of PVC foam board:

[0060] Place the foam board on the working table 2. According to the type of the PVC foam board, select whether to oil it. When calendering a common PVC foam board, first, the electric slider is turned on to drive the moving plate 362 to move downward in the moving groove 361 until the sponge 363 is closely attached to the pressure roller 37. Then, the electric push plate 374 is turned on to push downward until the arc section of the abutting plate 375 contacts the cam 371, so as to oil the PVC foam board during subsequent calendering.

[0061] S2: Calendering of PVC foam board:

[0062] Control the telescopic plate 11 to push downward, so that the entire calendering unit moves downward until the pressure roller 37 presses the PVC foam board. Turn on the pressure roller 37 to calender and shape the surface of the PVC foam board. At this time, the motor is turned on to drive the driving wheel 311 to rotate. When the driving wheel 311 rotates, it drives the two pressure rollers 37 to move through the movement of the two toothed plates 312 respectively. When the pressure roller 37 moves on the PVC foam board, friction is generated between the pressure roller 37 and the PVC foam board, causing the pressure roller 37 to rotate. When the pressure roller 37 rotates, it synchronously drives the cam 371 to rotate. When the cam 371 rotates, it intermittently presses the abutting plate 375, so that the lifting plate 373 moves upward. When the lifting plate 373 moves upward, it drives the sealing plug 365 to cancel the blockage of the telescopic pipe 364, so that the paint in the storage box 36 is added to the sponge 363. When the pressure roller 37 rotates, it continuously contacts the sponge 363, so that the paint is applied to the pressure roller 37.

[0063] S3: Adsorption of PVC foam board:

[0064] When the calendering unit moves downward as a whole, one end of the rocker 52 moves downward along with the connecting frame 32 and thus turns downward. When the rocker 52 turns downward, the other end of it moves upward. At this time, the piston rod 54 is synchronously driven to suck upward in the air cylinder 53, so that the negative pressure in the plurality of air holes 56 stably adsorbs the PVC foam board, thereby ensuring the stability during calendering. When the calendering unit moves upward as a whole, one end of the rocker 52 is lifted upward, and the other end of the rocker 52 presses downward on the piston rod 54. At this time, the gas in the air cylinder 53 is compressed and conveyed to the air holes 56 through the air delivery pipe 55, and finally the air holes 56 blow air on the calendered PVC foam board, thereby preventing the PVC foam board from sticking to the working table 2 after calendering.

[0065] When the present invention is in use, the foam board is placed on the working table 2, and it is determined whether to apply oil according to the type of the PVC foam board. When the device calenders the PVC skin foam board, its surface has a high hardness and good scratch resistance, so there is no need to additionally apply paint to the surface. By starting the motor to drive the driving wheel 311 to rotate, when the driving wheel 311 rotates, it drives the upper and lower two toothed plates 312 to slide closer to or away from each other through meshing. When the two toothed plates 312 slide, they respectively drive the two storage bins 36 to move closer to or away from each other synchronously through the two connecting blocks 313 connected to them. At this time, the calender rolls 37 are started. Since the telescopic plate 11 moves downward to drive the calender rolls 37 in the storage bins 36 to press the PVC foam board on the working table 2, when the two storage bins 36 move, the calender rolls 37 at their lower parts continuously rotate when sliding on the surface of the PVC foam board, so as to realize the rotary calendering and shaping of the surface of the PVC foam board. Compared with the existing calendering devices, when the present invention calenders the foam board in a rotary manner, through the mutual approach and separation between the two storage bins 36, it can meet the calendering of PVC foam boards with different widths, and compared with the one-piece calendering at a fixed position, the two storage bins 36 drive the calender rolls 37 to continuously displace, so that the surface of the PVC foam board is evenly calendered, and it can also effectively prevent the problem of the board surface turning yellow caused by excessive local temperature of the foam board;

[0066] When calendering ordinary PVC foam boards, to reduce friction with the calender roll 37 and prevent materials from adhering to the calender roll 37, oil is applied to the calender roll 37. At this time, the electric push plate 374 is activated to push down and drive the abutting plate 375 into contact with the cam 371. Subsequently, the electric slider is activated to drive the moving plate 362 to slide down. When the moving plate 362 slides down, it drives the sponge 363 to move down until it contacts the calender roll 37. When the two storage bins 36 move, friction is generated between the calender roll 37 and the foam board, causing the calender roll 37 to rotate. When the calender roll 37 rotates, it synchronously drives the cam 371 to rotate. When the cam 371 rotates, it intermittently pushes up the abutting plate 375. When the abutting plate 375 is pushed up, it drives the lifting plate 373 to slide up in the vertical groove 372. At this time, the inner plate 366 connected to the lifting plate 373 drives the sealing plug 365 to move up, removing the blockage of the telescopic tube 364. The oil in the storage bin 36 drips into the sponge 363 through the telescopic tube 364, thereby adding oil to the sponge 363. When the calender roll 37 rotates, it continuously contacts the sponge 363, enabling the sponge 363 to evenly apply the oil to the outside of the calender roll 37. So that when the calender roll 37 calenders the foam board, oil is applied to its surface. Compared with the existing calendering device, the present invention can flexibly choose whether to apply oil to the surface of the PVC foam board to be calendered according to the type of the foam board. By attaching a special paint to the surface of the foam board, it can effectively prevent adhesion between the material and the calender roll 37 during calendering, reduce friction, and automatically add oil by using the rotation of the calender roll 37 itself, without the need for additional manual continuous oiling of the surface of the calender roll 37. Moreover, the uniform contact between the calender roll 37 and the sponge 363 can ensure that the surface of the calender roll 37 is evenly coated with oil;

[0067] After the calendering unit moves down, the bottom of the contact ring 451 first contacts the foam board. Therefore, when the calendering unit continues to move down, the contact ring 451 moves up under the reaction force of the foam board. At this time, the moving rod 452 synchronously drives the first solenoid valve to move up. After the first solenoid valve contacts the second solenoid valve, the blower 46 is turned on, so that the air duct 47 blows air to cool the calendered foam board. The water in the two water tanks 42 and the conduction box 44 circulates, enabling the conduction box 44 to directly cool the foam board by water cooling when it contacts the foam board;

[0068] When the entire calendering unit moves downward, one end of the rocker 52 follows the connecting frame 32 and moves downward. At this time, the other end of the rocker 52 tilts upward, driving the piston rod 54 to move upward. When the piston rod 54 moves upward, it sucks the gas through the air pipe 55. At this time, the foaming board is stably adsorbed on the working table 2 through the air holes 56. When the calendering unit moves upward, one end of the rocker 52 connected to the connecting frame 32 is lifted. At this time, the other end of the rocker 52 drives the piston rod 54 to compress downward in the air cylinder 53. At this time, the gas in the air cylinder 53 blows the foaming board on the working table 2 through the air pipe 55 and the air holes 56. On the one hand, it can prevent the foaming board from adhering to the working table and facilitate the pushing of the foaming board. On the other hand, it can also dissipate heat from the bottom of the foaming board. Compared with the existing calendering unit, the present invention can stably adsorb the foaming board by moving downward during the calendering of the foaming board. At the same time, by blowing and dissipating heat from the bottom of the foaming board when the calendering unit moves upward, it can avoid adhesion with the working table 2.

[0069] The above shows and describes the basic principles, main features and advantages of the present invention. Those skilled in the art should understand that the present invention is not limited by the above embodiments. What is described in the above embodiments and the specification only illustrates the principles of the present invention. Without departing from the spirit and scope of the present invention, the present invention will have various changes and improvements, and these changes and improvements all fall within the scope of the present invention claimed.

Claims

1. A PVC foamed board calendering device, comprising a bottom plate (1), characterized in that, In the middle of the upper end surface of the bottom plate (1), an operating table (2) is fixedly installed. On both sides of the operating table (2), support frames (10) fixed to the bottom plate (1) are symmetrically installed. At the lower end of the middle part of the support frames (10), a telescopic plate (11) is fixedly installed. Between the two telescopic plates (11), a calendering unit is jointly installed. On the front and rear sides of the operating table (2), two pairs of symmetric cylinders (21) are installed. Between the two front-side cylinders (21), a front-side support plate (22) is jointly installed. Between the two rear-side cylinders (21), a rear-side support plate (23) is jointly installed. Below the rear-side support plate (23), two symmetric side plates (24) connected to the bottom plate (1) are provided. On both side plates (24), push rods (25) are installed. Between the two push rods (25), a push plate (26) is jointly installed. Between the left and right sides of the operating table (2) and the calendering unit, a stabilizing unit for adsorbing the foaming board during calendering is jointly installed. In the calendering unit, a temperature-lowering unit is provided.

2. The calendering device for a PVC foam board according to claim 1, wherein The calendering unit includes two symmetrically arranged guide frames (31). On the sides of the two guide frames (31), a connecting frame (32) is jointly installed. In the middle of the connecting frame (32), a feeding box (33) is fixedly installed. In the middle of the two guide frames (31), two groups of symmetrically arranged moving frames (35) are slidably installed. Between each group of moving frames (35), a storage box (36) is jointly installed. Between each of the two storage boxes (36) and the feeding box (33) on its adjacent side, a conveying pipe (34) is jointly installed. On one side of the middle of the two guide frames (31), symmetrically arranged driving wheels (311) are rotatably installed by a motor. Above and below the driving wheels (311), toothed plates (312) sliding with the guide frames (31) are engaged. On both the upper and lower toothed plates (312), connecting blocks (313) are installed. The two connecting blocks (313) are arranged in a front-back staggered manner. The ends of the two connecting blocks (313) away from the toothed plates (312) are respectively connected to the corresponding storage boxes (36).

3. A calendering device for PVC foamed board according to claim 2, characterized in that, On the inner walls of both sides of the storage box (36), moving grooves (361) are opened. In the moving grooves (361), moving plates (362) are slidably installed through electric sliders. Between the moving plates (362) on both sides, a sponge (363) is jointly installed. Between the sponge (363) and the cavity in the middle of the moving groove (361), a telescopic pipe (364) is jointly installed. In the telescopic pipe (364), a sealing plug (365) is provided. On one side of the upper end surface of the sealing plug (365), an inner plate (366) is fixedly installed.

4. A calendering device for PVC foam board according to claim 3, characterized in that, In the middle of the lower side of the storage box (36), a calendering roller (37) is rotatably installed. At the coaxial position on one side of the calendering roller (37), a cam (371) is fixedly installed. On one side of the storage box (36), a vertical groove (372) is opened. In the vertical groove (372), a lifting plate (373) connected to the inner plate (366) is slidably installed. In the middle of the lower end surface of the lifting plate (373), an electric push plate (374) is fixedly installed. At one end of the electric push plate (374), an abutting plate (375) is fixedly installed. One end of the abutting plate (375) is arc-shaped. The abutting plate (375) penetrates and slides in a through groove opened in the middle of the storage box (36).

5. A calendering device for PVC foam boards according to claim 1, characterized in that, The cooling unit includes two groups of side slots symmetrically arranged on both sides of the storage bin (36). A side bin (41) located on the side of the storage bin (36) is slidably installed in each group of side slots. A spring is installed between the side bin (41) and the side slot. Two symmetrically arranged water tanks (42) are fixedly installed in the inner cavity of the side bin (41). Two bellows (43) arranged vertically are installed between the two water tanks (42). A conduction box (44) communicating with the two water tanks (42) is fixedly installed on the lower end face of the side bin (41). A blower (46) is fixedly installed on the lower inner side of the side bin (41). A plurality of air ducts (47) are arranged below the blower (46).

6. The calendering device for PVC foamed board according to claim 5, characterized in that, A cylinder (45) is fixedly installed in the middle of the side of the side bin (41) away from the storage bin (36). A moving rod (452) is slidably installed in the cylinder (45). A contact ring (451) is fixedly installed on the lower end face of the moving rod (452). A spring is sleeved outside the moving rod (452). A first solenoid valve is fixedly installed at one end of the moving rod (452) away from the contact ring (451). A second solenoid valve fixed to the top of the inner cavity of the cylinder (45) is arranged above the first solenoid valve. When the first solenoid valve contacts the second solenoid valve, it is used to control the blower (46) to start blowing.

7. A calendering device for PVC foamed board according to claim 1, characterized in that, The stabilizing unit includes two groups of ear plates (51) symmetrically installed on the workbench (2). A rocker (52) is rotatably installed in the middle of each group of ear plates (51). An air cylinder (53) fixed to the workbench (2) is arranged below the rocker (52). A piston rod (54) is slidably installed in the middle of the air cylinder (53). A plurality of air holes (56) are opened on the workbench (2). An air delivery pipe (55) communicating with the air holes (56) is fixedly installed on the lower end face of the piston rod (54). One end of the rocker (52) is hinged to the top of the piston rod (54) and the other end is hinged to the connecting frame (32).

8. A calendering device for PVC foam board according to claim 1, characterized in that, Grooves (560) are opened at the four corners of the upper end face of the workbench (2). A pull rod (57) passing through the side of the workbench (2) is slidably installed in the grooves (560). A limiting plate (58) slidably installed in the grooves (560) is fixedly installed at one end of the pull rod (57). A spring is sleeved outside the pull rod (57). A pressing plate (59) is slidably installed in the middle of the limiting plate (58).

9. The calendering device for a PVC foamed board according to claim 4, characterized in that, The lowest end of the pressure roller (37) is lower than the lowest end of the guide frame (31). When the pressure roller (37) rotates, the abutting plate (375) is intermittently lifted by the cam (371), so that the raw materials in the storage bin (36) are automatically injected into the sponge (363).

10. A method for using a calendering device for PVC foam boards according to claim 1, applied to the calendering device for PVC foam boards according to claim 7, characterized in that, Including the following steps: S1: Selective oiling of the PVC foam board: Place the foam board on the workbench (2). Select whether to oil according to the type of the PVC foam board. When calendering the ordinary PVC foam board, first start the electric slider to drive the moving plate (362) to move down in the moving groove (361) until the sponge (363) is closely attached to the pressure roller (37). Then start the electric push plate (374) to push down until the arc section of the abutting plate (375) contacts the cam (371) for oiling during subsequent calendering of the PVC foam board. S2: Calendering of the PVC foam board: Control the push-down of the telescopic plate (11) so that the entire calendering unit moves downward until the calendering roller (37) presses the PVC foam board. Turn on the calendering roller (37) to perform calendering and shaping on the surface of the PVC foam board. At this time, turn on the motor to drive the driving wheel (311) to rotate. When the driving wheel (311) rotates, it drives the two calendering rollers (37) to move through the movement of the two toothed plates (312) respectively. When the calendering roller (37) moves on the PVC foam board, friction is generated between the calendering roller (37) and the PVC foam board, causing the calendering roller (37) to rotate. When the calendering roller (37) rotates, it synchronously drives the cam (371) to rotate. When the cam (371) rotates, it intermittently presses against the abutting plate (375), causing the lifting plate (373) to move upward. When the lifting plate (373) moves upward, it drives the sealing plug (365) to cancel the blockage of the telescopic pipe (364), so that the paint in the storage tank (36) is added to the sponge (363). When the calendering roller (37) rotates, it continuously contacts the sponge (363), so that the paint is applied to the calendering roller (37). S3: Adsorption of PVC foam board: When the entire calendering unit moves downward, one end of the rocker (52) moves downward along with the connecting frame (32) and turns downward. When the rocker (52) turns downward, the other end moves upward. At this time, it synchronously drives the piston rod (54) to suck upward in the air cylinder (53), so that the negative pressure in the plurality of air holes (56) stably adsorbs the PVC foam board, thus ensuring stability during calendering. When the entire calendering unit moves upward, one end of the rocker (52) is lifted upward, and the other end of the rocker (52) presses downward on the piston rod (54). At this time, the gas in the air cylinder (53) is compressed and delivered to the air holes (56) through the air delivery pipe (55), and finally the air holes (56) blow the calendered PVC foam board, so as to prevent the PVC foam board from sticking to the working table (2) after calendering.

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