Extrusion device for PVC wall cloth production and extrusion method thereof

Abstract

The invention relates to the technical field of PVC wall cloth production, in particular to an extrusion device for PVC wall cloth production and an extrusion method.The extrusion device comprises a base, an extrusion shell is fixedly connected to the center of the top of the base, and an upper pressing roller and a lower pressing roller which are used for compounding wall cloth are slidably installed in the extrusion shell; and one end of the extrusion shell is fixedly connected with a glue box. Through the arrangement of a first air pressure valve and a second air pressure valve, the air pressure in a rectangular piston cylinder and a rectangular piston groove can be effectively maintained, and through the mode of maintaining the air pressure, the contact between the upper pressing roller and the lower pressing roller is more stable; meanwhile, the situation that two layers of cloth are damaged due to too large pressure in the compounding process due to too large abutting force between the upper pressing roller and the lower pressing roller can be avoided, and the problem that effective compounding cannot be carried out due to too small pressure can also be avoided.

Description

Technical Field

[0001] The invention relates to the field of PVC wall cloth production, and in particular to an extrusion device and an extrusion method for PVC wall cloth production. Background Art

[0002] PVC wall cloth is made of PVC material. Its surface can be printed, embossed and foamed. Its color can be freely adjusted to make it natural, smooth, light and elegant. It has the advantages of flame retardant, heat insulation, sound absorption, mildew resistance, and is not easy to condense, not afraid of water washing, and not susceptible to mechanical damage. In actual production, the compounding of PVC wall cloth is usually carried out by extrusion.

[0003] In the patent with publication number CN217778030U, a wall cloth compression molding composite device is disclosed, including: a support frame, movable grooves are opened on both sides of the interior of the support frame, and sliding rods are fixedly installed inside the movable grooves.

[0004] However, the above device still has certain problems when extruding PVC wall cloth. During the process of extruding the cloth, the extrusion pressure cannot be effectively controlled. Too high pressure will cause damage to the cloth, while too low pressure will cause the cloth to be unable to be effectively compounded and easily dispersed during subsequent use. Summary of the invention

[0005] The purpose of the present invention is to solve the shortcomings of the prior art and to propose an extrusion device and an extrusion method for producing PVC wall cloth.

[0006] To achieve the above purpose, the technical solution adopted by the present invention is: an extrusion device for producing PVC wall cloth, comprising a base, an extrusion shell is fixedly connected to the top center of the base, an upper pressing roller and a lower pressing roller for compounding the wall cloth are slidably installed inside the extrusion shell, one end of the extrusion shell is fixedly connected to a glue box, a sealing assembly is arranged at the bottom of the glue box, a hot air blower is fixedly connected to the top of the extrusion shell, the hot air blower is used to drive the upper pressing roller to press down, and the hot air blower is also used to drive the sealing assembly to open, a cold air blower is arranged on one side of the base, the cold air blower is used to drive the lower pressing roller to rise, and the cold air blower is also used to cool the compounded wall cloth.

[0007] Preferably, a rectangular piston cylinder is fixedly connected to the top center of the extrusion shell, a rectangular piston plate is slidably connected to the inside of the rectangular piston cylinder, connecting slide columns are fixedly connected to both ends of the bottom of the rectangular piston plate, the connecting slide columns penetrate the bottom wall plate of the rectangular piston cylinder, and the end of the connecting slide column away from the rectangular piston plate is fixedly connected to the first U-shaped frame, two connecting slide columns are respectively fixedly connected to the horizontal end of the first U-shaped frame, and the two vertical ends of the first U-shaped frame are respectively rotatably connected to the two ends of the upper pressure roller.

[0008] Preferably, a rectangular piston groove is provided at the center of the connection between the base and the extrusion shell, a sliding plate is slidably connected inside the rectangular piston groove, a second U-shaped frame is fixedly connected to the top of the sliding plate, the horizontal end of the second U-shaped frame is fixedly connected to the sliding plate, the two vertical ends of the second U-shaped frame are respectively rotatably connected to the two ends of the lower pressure roller, and the openings of the first U-shaped frame and the second U-shaped frame are opposite to each other.

[0009] Preferably, the output end of the hot air blower is connected to the rectangular piston cylinder, and the connection point between the two is located above the rectangular piston plate, and pressure relief air pipes are connected to both sides of the top of the rectangular piston cylinder, and the end of the pressure relief air pipe away from the rectangular piston cylinder is connected to the sealing assembly, and a first air pressure valve is provided at the connection point between the rectangular piston cylinder and the pressure relief air pipe, the glue box is fixedly connected to one end of the extrusion shell, and a glue leakage port is opened at the bottom of the glue box, and a glue coating roller is rotatably connected to the bottom of the glue box, and the glue coating roller is located at the bottom of the glue leakage port.

[0010] Preferably, the blocking assembly includes a hollow plate, which is fixedly connected to a side of the rubber box away from the extrusion shell, a hollow layer is arranged inside the hollow plate, a driving slide is slidably connected to the hollow layer, a blocking slide is fixedly connected to one side of the driving slide, a sliding groove is provided at the bottom of the rubber box, the sliding groove passes through the rubber leakage port, the blocking slide is slidably connected in the sliding groove, a rectangular hole is provided on the blocking slide, an air outlet inclined groove is provided at the bottom center of the hollow plate, the hollow layer of the hollow plate is connected to one end of the pressure relief air pipe away from the rectangular piston cylinder, an elastic paddle is provided at one end of the sliding groove away from the hollow plate, the elastic paddle abuts against the blocking slide, and the elastic paddle is used to drive the blocking slide to rebound.

[0011] Preferably, the air cooler is fixedly connected to one side of the base, and the output end of the air cooler is connected to an output pipe, which passes through the bottom wall plate of the base, and the end of the output pipe away from the air cooler is connected to the rectangular piston groove, and an air outlet is provided at the bottom of the rectangular piston groove, and a second air pressure valve is provided in the air outlet, and a water tank is provided inside the base, which is connected to the air outlet, and a transverse groove is provided in the top wall plate of the base, and the bottom of the transverse groove is connected to the water tank, and the top of the transverse groove is connected to a plurality of cooling air holes, and the cooling air holes are provided at the top of the base, and the cooling air holes are located on the side of the extrusion shell away from the rubber box.

[0012] Preferably, feed ports are provided on the top and bottom of the wall panel of the extrusion shell on the side close to the rubber box, a heating plate is embedded in the wall panel of the extrusion shell on the side close to the rubber box, the heating plate is located between the two feed ports, a plurality of heat-conducting columns are fixedly connected to one side of the heating plate, the plurality of heat-conducting columns penetrate the side wall of the rubber box and extend into the rubber box, a plurality of conveying rollers are rotatably connected to the inner bottom of the extrusion shell, and a discharge port is provided at the bottom of the wall panel of the extrusion shell on the side away from the rubber box.

[0013] Preferably, one end of the base is fixedly connected to a loading rack, and a composite cloth roller is rotatably connected to the top of the loading rack, and the cloth on the composite cloth roller enters the interior of the extrusion shell from the feed port located above, and limiting rollers and abutment rollers are respectively arranged on both sides of the feed port located above, and the limiting rollers and abutment rollers are both arranged on the extrusion shell, and the horizontal height of the limiting rollers is higher than the horizontal height of the abutment rollers, and a base material cloth roller is rotatably connected to the middle section of the loading rack, and a balancing roller is also arranged on the top of the base, and the balancing roller is located between the loading rack and the extrusion shell, and the cloth on the base material cloth roller passes under the balancing roller and under the glue coating roller, and then enters the extrusion shell through the feed port located below.

[0014] Preferably, a winding roller is provided at one end of the top of the base away from the loading rack, and the cooling air hole is located between the extrusion shell and the winding roller.

[0015] Preferably, an extrusion method of an extrusion device for producing PVC wall cloth comprises the following steps:

[0016] Step 1: The fabric on the composite fabric roller passes through the bottom of the limiting roller and the feed port located above, then passes through the top of the abutting roller, and then passes between the upper pressing roller and the lower pressing roller;

[0017] Step 2: The fabric on the base material feeding roller passes under the balance roller and the glue coating roller, then passes through the feeding port located below, and then passes between the upper pressing roller and the lower pressing roller. After being squeezed by the upper pressing roller and the lower pressing roller, the fabric passes through the feeding port and is finally wound around the winding roller.

[0018] Step 3: Turn on the hot air blower and the cold air blower to squeeze the upper pressing roller and the lower pressing roller. After the two layers of fabric are squeezed between the upper pressing roller and the lower pressing roller, a composite wall covering is obtained.

[0019] Compared with the prior art, the present invention has the following beneficial effects:

[0020] 1. The present invention can effectively maintain the air pressure in the rectangular piston cylinder and the rectangular piston groove by setting the first air pressure valve and the second air pressure valve. By maintaining the air pressure, the contact between the upper pressure roller and the lower pressure roller is more stable. At the same time, it can also avoid the damage of the two layers of cloth due to excessive pressure during the compounding process caused by excessive abutment force between the upper pressure roller and the lower pressure roller, and can also avoid the problem of inability to perform effective compounding due to too low pressure.

[0021] 2. The present invention provides a hot air blower. When the gas blown out by the hot air blower enters the rectangular piston cylinder, the gas will be squeezed, causing the molecules in the gas to collide with each other and generate heat. Then the hot air enters the hollow plate through the pressure relief air pipe. The air outlet inclined slot provided on the hollow plate is used to blow the hot air onto the cloth wrapped around the base material cloth roller. On the one hand, the dust on the cloth wrapped around the base material cloth roller can be blown off. On the other hand, the hot air can be used to preheat the cloth wrapped around the base material cloth roller, so that the subsequent glue can be effectively attached to the cloth.

[0022] 3. The present invention is provided with an air cooler. During operation, the air cooler blows air into the rectangular piston groove. When the air pressure in the rectangular piston groove is higher than the preset pressure value of the second air pressure valve, the second air pressure valve opens, thereby allowing the air flow in the rectangular piston groove to flow out. After flowing out, the air flow in the rectangular piston groove will impact the water in the water tank, and the flow of the air flow will accelerate the evaporation of water, thereby reducing the temperature of the air flow. The air flow entering the water tank will finally pass through the horizontal grooves and enter the cooling air holes, and finally blow on the bottom of the composite wall cloth. By blowing the cold air flow on the bottom of the composite wall cloth, the purpose of cooling the composite wall cloth can be achieved. BRIEF DESCRIPTION OF THE DRAWINGS

[0023] Figure 1 It is a schematic diagram of the overall structure of the present invention;

[0024] Figure 2 It is a schematic diagram of the overall structure of the present invention from another perspective;

[0025] Figure 3 It is a schematic cross-sectional view of the structure of the base of the present invention;

[0026] Figure 4 For the present invention Figure 3 An enlarged schematic diagram of the structure of section A is shown;

[0027] Figure 5 For the present invention Figure 3 An enlarged schematic diagram of the structure of part B is shown;

[0028] Figure 6 It is a schematic cross-sectional view of the structure of the rectangular piston cylinder of the present invention;

[0029] Figure 7 It is a schematic diagram of the connection structure of the upper and lower rollers and the lower pressure roller of the present invention;

[0030] Figure 8 It is a schematic diagram of the connection structure of the heat-conducting column of the present invention;

[0031] Fig. 9 It is a schematic diagram of the connection structure of the blocking slide plate of the present invention.

[0032] In the figure: 1. base; 2. extrusion shell; 3. loading rack; 4. composite material feeding roller; 5. base material feeding roller; 6. balance roller; 7. pressure relief air pipe; 8. hot air blower; 9. cold air blower; 10. cooling air hole; 11. glue box; 12. hollow plate; 13. limit roller; 14. winding roller; 15. abutting roller; 16. rectangular piston cylinder; 17. rectangular piston plate; 18. conveying roller; 19. heating plate ; 20. Heat-conducting column; 21. Glue coating roller; 22. Glue leakage port; 23. Driving slide plate; 24. Elastic paddle; 25. Sealing slide plate; 26. First U-shaped frame; 27. Upper pressure roller; 28. Lower pressure roller; 29. ​​Second U-shaped frame; 30. Sliding plate; 31. Rectangular piston groove; 32. Air outlet inclined groove; 33. Output pipe; 34. Connecting slide column; 35. Water tank; 36. Rectangular hole; 37. Horizontal groove. DETAILED DESCRIPTION

[0033] The following description is used to disclose the present invention so that those skilled in the art can implement the present invention. The preferred embodiments described below are only examples, and those skilled in the art may think of other obvious variations.

[0034] like Figures 1 to 9 The extrusion device for producing PVC wall cloth shown includes a base 1, an extrusion shell 2 is fixedly connected to the top center of the base 1, an upper pressing roller 27 and a lower pressing roller 28 for compounding the wall cloth are slidably installed inside the extrusion shell 2, one end of the extrusion shell 2 is fixedly connected to a glue box 11, a sealing assembly is arranged at the bottom of the glue box 11, a hot air blower 8 is fixedly connected to the top of the extrusion shell 2, the hot air blower 8 is used to drive the upper pressing roller 27 to press down, and the hot air blower 8 is also used to drive the sealing assembly to open, a cold air blower 9 is arranged on one side of the base 1, the cold air blower 9 is used to drive the lower pressing roller 28 to rise, and the cold air blower 9 is also used to cool the compounded wall cloth.

[0035] In a specific implementation, a glue adding port is provided on one side of the top of the glue box 11, and a plug is provided in the glue adding port to seal the glue adding port.

[0036] As a further embodiment of the present invention, a rectangular piston cylinder 16 is fixedly connected to the top center of the extrusion shell 2, a rectangular piston plate 17 is slidably connected to the inside of the rectangular piston cylinder 16, and connecting slide columns 34 are fixedly connected to both ends of the bottom of the rectangular piston plate 17. The connecting slide columns 34 penetrate the bottom wall plate of the rectangular piston cylinder 16, and the end of the connecting slide column 34 away from the rectangular piston plate 17 is fixedly connected to the first U-shaped frame 26. The two connecting slide columns 34 are respectively fixedly connected to the horizontal ends of the first U-shaped frame 26, and the two vertical ends of the first U-shaped frame 26 are respectively rotatably connected to the two ends of the upper pressure roller 27.

[0037] In a specific implementation, a balancing air hole for maintaining air pressure balance is opened at the bottom center of the rectangular piston cylinder 16. The balancing air hole is used to maintain the air pressure in the chamber below the rectangular piston plate 17 in the rectangular piston cylinder 16 balanced with the external atmospheric pressure.

[0038] As a further implementation scheme of the present invention, a rectangular piston groove 31 is provided at the center of the connection between the base 1 and the extrusion shell 2, and a sliding plate 30 is slidably connected inside the rectangular piston groove 31. A second U-shaped frame 29 is fixedly connected to the top of the sliding plate 30, and the horizontal end of the second U-shaped frame 29 is fixedly connected to the sliding plate 30. The two vertical ends of the second U-shaped frame 29 are respectively rotatably connected to the two ends of the lower pressure roller 28, and the openings of the first U-shaped frame 26 and the second U-shaped frame 29 are opposite to each other.

[0039] In a specific implementation, a sealing ring is provided on the side of the sliding plate 30 .

[0040] As a further implementation scheme of the present invention, the output end of the hot air blower 8 is connected to the rectangular piston cylinder 16, and the connection point between the two is located above the rectangular piston plate 17. The top two sides of the rectangular piston cylinder 16 are connected with pressure relief air pipes 7. The end of the pressure relief air pipe 7 away from the rectangular piston cylinder 16 is connected to the sealing component. A first air pressure valve is provided at the connection point between the rectangular piston cylinder 16 and the pressure relief air pipe 7. The glue box 11 is fixedly connected to one end of the extrusion shell 2. A glue leakage port 22 is opened at the bottom of the glue box 11. The bottom of the glue box 11 is rotatably connected to a glue coating roller 21, and the glue coating roller 21 is located at the bottom of the glue leakage port 22.

[0041] In a specific implementation, the first air pressure valve is provided with a first preset pressure value. When the air pressure in the rectangular piston cylinder 16 is higher than the first preset pressure value, the first air pressure valve is opened, otherwise the first air pressure valve is closed.

[0042] As a further implementation scheme of the present invention, the blocking component includes a hollow plate 12, which is fixedly connected to the side of the rubber box 11 away from the extrusion shell 2. A hollow layer is arranged inside the hollow plate 12, and a driving slide 23 is slidably connected in the hollow layer. A blocking slide 25 is fixedly connected to one side of the driving slide 23. A sliding groove is provided at the bottom of the rubber box 11, and the sliding groove passes through the rubber leakage port 22. The blocking slide 25 is slidably connected in the sliding groove. A rectangular hole 36 is provided on the blocking slide 25. An air outlet inclined groove 32 is provided at the bottom center of the hollow plate 12. The hollow layer of the hollow plate 12 is connected to one end of the pressure relief air pipe 7 away from the rectangular piston cylinder 16. An elastic paddle 24 is provided at the end of the sliding groove away from the hollow plate 12. The elastic paddle 24 abuts against the blocking slide 25. The elastic paddle 24 is used to drive the blocking slide 25 to rebound.

[0043] In a specific implementation, after the hot air blower 8 is turned off, the elastic paddle 24 will apply an elastic force to the blocking slide 25. The elastic force can move the blocking slide 25 away from the extrusion shell 2, so that the blocking slide 25 can block the glue leakage port 22.

[0044] As a further implementation scheme of the present invention, the air cooler 9 is fixedly connected to one side of the base 1, and the output end of the air cooler 9 is connected to an output pipe 33, which passes through the bottom wall panel of the base 1, and the end of the output pipe 33 away from the air cooler 9 is connected to the rectangular piston groove 31, and an air outlet is provided at the bottom of the rectangular piston groove 31, and a second air pressure valve is provided in the air outlet. A water tank 35 is provided inside the base 1, and the water tank 35 is connected to the air outlet. A transverse groove 37 is provided in the top wall panel of the base 1, and the bottom of the transverse groove 37 is connected to the water tank 35, and the top of the transverse groove 37 is connected to a plurality of cooling air holes 10, and the cooling air holes 10 are provided at the top of the base 1, and the cooling air holes 10 are located on the side of the extrusion shell 2 away from the rubber box 11.

[0045] In a specific implementation, the second air pressure valve is provided with a second preset pressure value. When the air pressure in the rectangular piston groove 31 is higher than the second preset pressure value, the second air pressure valve is opened, otherwise the second air pressure valve is closed. Water is pre-added in the water tank 35, and a water inlet is provided on one side of the top of the water tank 35. A water adding valve is provided in the water inlet, and the water adding valve is only opened when water is added. The water added in the water tank 35 can also absorb and offset the vibration generated by the device in the process of compounding the wall cloth to a certain extent, converting mechanical energy into the internal energy of water, thereby playing a role in shock absorption and noise reduction.

[0046] As a further implementation scheme of the present invention, feed ports are provided at the top and bottom of the wall panel of the extrusion shell 2 on the side close to the rubber box 11, and a heating plate 19 is embedded in the wall panel of the extrusion shell 2 on the side close to the rubber box 11. The heating plate 19 is located between the two feed ports, and a plurality of heat-conducting columns 20 are fixedly connected to one side of the heating plate 19. The plurality of heat-conducting columns 20 penetrate the side wall of the rubber box 11 and extend into the rubber box 11. A plurality of conveying rollers 18 are rotatably connected to the inner bottom of the extrusion shell 2, and a discharge port is provided at the bottom of the wall panel of the extrusion shell 2 on the side away from the rubber box 11.

[0047] In a specific implementation, the setting of the heating plate 19 can effectively preheat the fabrics wound around the composite fabric roller 4 and the base material fabric roller 5, so as to avoid incomplete glue adhesion caused by temperature difference during the subsequent composite process.

[0048] As a further implementation scheme of the present invention, one end of the base 1 is fixedly connected to a loading rack 3, and a composite cloth roller 4 is rotatably connected to the top of the loading rack 3. The cloth on the composite cloth roller 4 enters the interior of the extrusion shell 2 from the feed port located above. Limit rollers 13 and abutment rollers 15 are respectively arranged on both sides of the feed port located above. The limit rollers 13 and the abutment rollers 15 are both arranged on the extrusion shell 2, and the horizontal height of the limit rollers 13 is higher than the horizontal height of the abutment rollers 15. A base material cloth roller 5 is rotatably connected to the middle section of the loading rack 3. A balancing roller 6 is also arranged on the top of the base 1. The balancing roller 6 is located between the loading rack 3 and the extrusion shell 2. The cloth on the base material cloth roller 5 passes under the balancing roller 6 and under the glue coating roller 21, and then enters the extrusion shell 2 through the feed port located below.

[0049] In a specific implementation, a rotation damping structure is provided on both the composite cloth roller 4 and the base material cloth roller 5. The rotation damping structure is used to adjust the rotation speed of the composite cloth roller 4 and the base material cloth roller 5, so as to maintain the subsequent cloth in a straight state. This technology is a prior art and will not be disclosed in detail here.

[0050] As a further embodiment of the present invention, a winding roller 14 is provided at one end of the top of the base 1 away from the loading rack 3 , and the cooling air hole 10 is located between the extrusion shell 2 and the winding roller 14 .

[0051] In a specific implementation, one side of the winding roller 14 is connected to a motor, and the motor is used to drive the winding roller 14 to wind up the composite wall covering.

[0052] As a further embodiment of the present invention, an extrusion method of an extrusion device for producing PVC wall cloth, the extrusion method specifically comprises the following steps:

[0053] Step 1: The fabric on the composite fabric roller 4 passes through the bottom of the limiting roller 13 and the feed port located above, then passes through the top of the abutting roller 15, and then passes between the upper pressing roller 27 and the lower pressing roller 28;

[0054] Step 2: The fabric on the base material feeding roller 5 passes under the balance roller 6 and under the glue coating roller 21, then passes through the feed port located below, and then passes between the upper pressing roller 27 and the lower pressing roller 28. After being squeezed by the upper pressing roller 27 and the lower pressing roller 28, the fabric passes through the discharge port and is finally wound around the winding roller 14.

[0055] Step 3: Turn on the hot air blower 8 and the cold air blower 9 to squeeze the upper pressing roller 27 and the lower pressing roller 28 to obtain a composite wall cloth after the two layers of cloth are squeezed between the upper pressing roller 27 and the lower pressing roller 28.

[0056] In a specific implementation, during the process of compounding the two layers of fabric, the hot air blower 8 and the cold air blower 9 are first turned on.

[0057] Working principle of the present invention:

[0058] When the present invention is in use, the cloth on the composite cloth roller 4 is sequentially passed through the lower part of the limiting roller 13 and the feed port located above, and then passed through the upper part of the abutting roller 15. The limiting roller 13 and the abutting roller 15 are used to limit the cloth so that the cloth can smoothly pass through the feed port. After passing through the abutting roller 15, the cloth passes between the upper pressing roller 27 and the lower pressing roller 28. The cloth on the base material cloth roller 5 is sequentially passed through the lower part of the balance roller 6 and the lower part of the glue coating roller 21, and then enters the extrusion housing 2 through the feed port located below, and then passes between the upper pressing roller 27 and the lower pressing roller 28. After being squeezed by the upper pressing roller 27 and the lower pressing roller 28, the cloth passes through the discharge port and is finally wound around the winding roller 14.

[0059] When the cloth on the composite cloth roller 4 and the cloth on the base material cloth roller 5 pass between the upper pressing roller 27 and the lower pressing roller 28, the pressure between the upper pressing roller 27 and the lower pressing roller 28 is used to effectively compound the two layers of cloth. After the cloth is compounded to form a wall cloth, the wall cloth is collected by the winding roller 14. It should be noted that the base material cloth roller 5 is wound with PVC cloth.

[0060] In the process of compounding the fabrics, the hot air blower 8 and the cold air blower 9 are first turned on. After the hot air blower 8 is turned on, the hot air blower 8 will deliver airflow to the rectangular piston cylinder 16, thereby increasing the air pressure in the rectangular piston cylinder 16, and using the air pressure to squeeze the rectangular piston plate 17, so that the rectangular piston plate 17 slides downward. During the downward sliding of the rectangular piston plate 17, the first U-shaped frame 26 will be pushed to drive the upper pressure roller 27 to move downward, so that the upper pressure roller 27 can fully squeeze the two layers of fabric, thereby effectively compounding the fabrics. As the air pressure in the rectangular piston cylinder 16 increases, when the air pressure in the rectangular piston cylinder 16 increases to the preset pressure value of the first air pressure valve, the first air pressure valve opens, so that the gas in the rectangular piston cylinder 16 is discharged into the pressure relief air pipe 7.

[0061] After the air cooler 9 is turned on, it will blow air into the rectangular piston groove 31 through the output pipe 33, and use the air pressure to lift the sliding plate 30, so that the sliding plate 30 lifts the second U-shaped frame 29. After the second U-shaped frame 29 is lifted, it will drive the lower pressure roller 28 to move upward, so that the lower pressure roller 28 and the upper pressure roller 27 are further abutted, which is conducive to promoting the full compounding of the two layers of cloth, and avoiding the occurrence of wrinkles and loose adhesion due to insufficient contact between the cloths during the compounding process of the two layers of cloth. As the air pressure in the rectangular piston groove 31 increases, when the air pressure in the rectangular piston groove 31 reaches the preset pressure value of the second air pressure valve, the second air pressure valve opens, so that the airflow in the rectangular piston groove 31 can be discharged.

[0062] By setting the first air pressure valve and the second air pressure valve, the air pressure in the rectangular piston cylinder 16 and the rectangular piston groove 31 can be effectively maintained. By maintaining the air pressure, the contact between the upper pressure roller 27 and the lower pressure roller 28 is made more stable. At the same time, it can also avoid that the two layers of cloth are damaged due to excessive pressure during the compounding process due to excessive abutment force between the upper pressure roller 27 and the lower pressure roller 28.

[0063] The gas blown out by the hot air blower 8 will enter the hollow plate 12 after passing through the pressure relief air pipe 7. The gas will squeeze the driving slide 23 in the hollow plate 12, pushing the driving slide 23 toward the direction close to the extrusion shell 2, so that the driving slide 23 drives the blocking slide 25 toward the direction close to the extrusion shell 2. After the driving slide 23 moves to the end of the hollow plate 12 close to the extrusion shell 2, the glue leakage port 22 and the rectangular hole 36 overlap, so that the glue in the glue box 11 can be soaked on the glue roller 21, and then the glue is applied to the cloth around the base material cloth roller 5 through the glue roller 21. After the driving slide 23 moves to the end of the hollow plate 12 close to the extrusion shell 2, the pressure relief air pipe 7, the hollow layer of the hollow plate 12 and the air outlet chute 32 will form a passage, so that the airflow can flow out through the air outlet chute 32.

[0064] When the gas blown out by the hot air blower 8 enters the rectangular piston cylinder 16, the gas will be squeezed, causing the molecules in the gas to collide with each other and generate heat. Then, the hot air enters the hollow plate 12 through the pressure relief air pipe 7. The air outlet inclined slot 32 provided on the hollow plate 12 is used to blow the hot air onto the fabric wound around the base material fabric roller 5. On the one hand, the dust on the fabric wound around the base material fabric roller 5 can be blown off. On the other hand, the hot air can also be used to preheat the fabric wound around the base material fabric roller 5, so that the subsequent glue can be effectively attached to the fabric.

[0065] As the cloth moves, when the cloth enters the feed port, the heating plate 19 will also be turned on. Since the heating plate 19 is arranged between the two feed ports, the heat emitted by the heating plate 19 will be conducted to the two feed ports, and the heating plate 19 then effectively preheats the two layers of cloth through the two feed ports, which is beneficial to reduce the temperature difference between the cloths, so that the glue can effectively adhere the two layers of cloth, which is beneficial to avoid the incomplete compounding of the glue due to the temperature difference between the cloths, resulting in easy separation during subsequent use. Secondly, the heat emitted by the heating plate 19 will also be conducted to the heat-conducting column 20, and the heat will be conducted to the glue box 11 through the heat-conducting column 20 to heat the glue in the glue box 11, which is beneficial to maintain the activity of the glue and avoid the glue from condensing due to cooling.

[0066] After the cloth is squeezed by the upper pressing roller 27 and the lower pressing roller 28, the cloth is compounded into a wall cloth, and then discharged through the discharge port, and then wound around the winding roller 14. After the wall cloth comes out of the discharge port, the cooling air hole 10 will effectively cool the compounded cloth to reduce its temperature. During the operation of the air cooler 9, the air cooler 9 blows air into the rectangular piston groove 31. When the air pressure in the rectangular piston groove 31 is higher than the preset pressure value of the second air pressure valve, the second air pressure valve opens, thereby allowing the air flow in the rectangular piston groove 31 to flow out. After the air flow in the rectangular piston groove 31 flows out, it will impact on the water in the water tank 35, and the flow of the air flow will accelerate the evaporation of water, thereby reducing the temperature of the air flow. The air flow entering the water tank 35 will finally enter the cooling air hole 10 through the transverse groove 37, and finally blow on the bottom of the compounded wall cloth. By blowing the cold air flow on the bottom of the compounded wall cloth, the purpose of cooling the compounded wall cloth is achieved.

[0067] 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 to the above embodiments, and the above embodiments and descriptions only describe the principles of the present invention. The present invention may be subject to various changes and improvements without departing from the spirit and scope of the present invention, and these changes and improvements fall within the scope of the present invention claimed.

Claims

1. An extrusion device for producing PVC wall cloth, comprising a base (1), characterized in that: An extrusion shell (2) is fixedly connected to the center of the top of the base (1); an upper pressing roller (27) and a lower pressing roller (28) for compounding the wall cloth are slidably installed inside the extrusion shell (2); a glue box (11) is fixedly connected to one end of the extrusion shell (2); a sealing component is arranged at the bottom of the glue box (11); a hot air blower (8) is fixedly connected to the top of the extrusion shell (2); the hot air blower (8) is used to drive the upper pressing roller (27) to press downward; the hot air blower (8) is also used to drive the sealing component to open; a cold air blower (9) is arranged on one side of the base (1); the cold air blower (9) is used to drive the lower pressing roller (28) to rise; the cold air blower (9) is also used to cool the compounded wall cloth.

2. The extrusion device for producing PVC wall cloth according to claim 1, characterized in that: A rectangular piston cylinder (16) is fixedly connected to the center of the top of the extrusion shell (2), a rectangular piston plate (17) is slidably connected to the inside of the rectangular piston cylinder (16), connecting slide columns (34) are fixedly connected to both ends of the bottom of the rectangular piston plate (17), the connecting slide columns (34) penetrate the bottom wall plate of the rectangular piston cylinder (16), and one end of the connecting slide column (34) away from the rectangular piston plate (17) is fixedly connected to a first U-shaped frame (26), two connecting slide columns (34) are respectively fixedly connected to the horizontal ends of the first U-shaped frame (26), and two vertical ends of the first U-shaped frame (26) are respectively rotatably connected to the two ends of the upper pressure roller (27).

3. The extrusion device for producing PVC wall cloth according to claim 2, characterized in that: A rectangular piston groove (31) is provided at the center of the connection between the base (1) and the extrusion shell (2); a sliding plate (30) is slidably connected inside the rectangular piston groove (31); a second U-shaped frame (29) is fixedly connected to the top of the sliding plate (30); a horizontal end of the second U-shaped frame (29) is fixedly connected to the sliding plate (30); two vertical ends of the second U-shaped frame (29) are rotatably connected to two ends of the lower pressure roller (28); and the openings of the first U-shaped frame (26) and the second U-shaped frame (29) are opposed to each other.

4. The extrusion device for producing PVC wall cloth according to claim 3, characterized in that: The output end of the hot air blower (8) is connected to the rectangular piston cylinder (16), and the connection point between the two is located above the rectangular piston plate (17). Both sides of the top of the rectangular piston cylinder (16) are connected to pressure relief air pipes (7). One end of the pressure relief air pipe (7) away from the rectangular piston cylinder (16) is connected to a blocking component. A first air pressure valve is provided at the connection point between the rectangular piston cylinder (16) and the pressure relief air pipe (7). The glue box (11) is fixedly connected to one end of the extrusion shell (2). A glue leakage port (22) is provided at the bottom of the glue box (11). A glue coating roller (21) is rotatably connected to the bottom of the glue box (11). The glue coating roller (21) is located at the bottom of the glue leakage port (22).

5. The extrusion device for producing PVC wall cloth according to claim 4, characterized in that: The blocking component comprises a hollow plate (12), the hollow plate (12) being fixedly connected to a side of the rubber box (11) away from the extrusion shell (2), a hollow layer being arranged inside the hollow plate (12), a driving slide plate (23) being slidably connected inside the hollow layer, a blocking slide plate (25) being fixedly connected to one side of the driving slide plate (23), a sliding groove being arranged at the bottom of the rubber box (11), the sliding groove penetrating the rubber leakage port (22), the blocking slide plate (25) being slidably connected to the sliding groove A rectangular hole (36) is provided on the blocking slide plate (25), an air outlet inclined groove (32) is provided at the bottom center of the hollow plate (12), the hollow layer of the hollow plate (12) is connected to the end of the pressure relief air pipe (7) away from the rectangular piston cylinder (16), and an elastic paddle (24) is provided at the end of the sliding groove away from the hollow plate (12), the elastic paddle (24) is in contact with the blocking slide plate (25), and the elastic paddle (24) is used to drive the blocking slide plate (25) to rebound.

6. The extrusion device for producing PVC wall cloth according to claim 5, characterized in that: The air cooler (9) is fixedly connected to one side of the base (1); the output end of the air cooler (9) is connected to an output pipe (33); the output pipe (33) passes through the bottom wall of the base (1); the end of the output pipe (33) away from the air cooler (9) is connected to the rectangular piston groove (31); the bottom of the rectangular piston groove (31) is provided with an air outlet; a second air pressure valve is provided in the air outlet; a water tank (35) is provided inside the base (1); the water tank (35) is connected to the air outlet; a transverse groove (37) is provided in the top wall of the base (1); the bottom of the transverse groove (37) is connected to the water tank (35); the top of the transverse groove (37) is connected to a plurality of cooling air holes (10); the cooling air holes (10) are provided at the top of the base (1), and the cooling air holes (10) are located on the side of the extrusion shell (2) away from the rubber box (11).

7. The extrusion device for producing PVC wall cloth according to claim 6, characterized in that: The top and bottom of the wall panel of the extrusion shell (2) close to the rubber box (11) are both provided with feed ports, a heating plate (19) is embedded in the wall panel of the extrusion shell (2) close to the rubber box (11), the heating plate (19) is located between the two feed ports, a plurality of heat-conducting columns (20) are fixedly connected to one side of the heating plate (19), the plurality of heat-conducting columns (20) penetrate the side wall of the rubber box (11) and extend into the rubber box (11), a plurality of conveying rollers (18) are rotatably connected to the inner bottom of the extrusion shell (2), and a discharge port is provided at the bottom of the wall panel of the extrusion shell (2) away from the rubber box (11).

8. The extrusion device for producing PVC wall cloth according to claim 7, characterized in that: One end of the base (1) is fixedly connected to a loading rack (3), and a composite material distributing roller (4) is rotatably connected to the top of the loading rack (3). The material on the composite material distributing roller (4) enters the interior of the extrusion shell (2) from a feeding port located at the top. A limiting roller (13) and an abutting roller (15) are respectively arranged on both sides of the feeding port located at the top. The limiting roller (13) and the abutting roller (15) are both arranged on the extrusion shell (2), and the horizontal height of the limiting roller (13) is higher than the horizontal height of the abutting roller (15). A base material distributing roller (5) is rotatably connected to the middle section of the loading rack (3). A balancing roller (6) is also arranged on the top of the base (1). The balancing roller (6) is located between the loading rack (3) and the extrusion shell (2). After the material on the base material distributing roller (5) passes under the balancing roller (6) and under the glue coating roller (21), it enters the extrusion shell (2) through the feeding port located at the bottom.

9. The extrusion device for producing PVC wall cloth according to claim 8, characterized in that: A winding roller (14) is provided at one end of the top of the base (1) away from the loading rack (3), and the cooling air hole (10) is located between the extrusion shell (2) and the winding roller (14).

10. The extrusion method of the extrusion device for producing PVC wall cloth according to claim 9, characterized in that: The extrusion method specifically comprises the following steps: Step 1: The fabric on the composite fabric roller (4) passes through the bottom of the limiting roller (13) and the feed port located above, then passes through the top of the abutting roller (15), and then passes between the upper pressing roller (27) and the lower pressing roller (28); Step 2: The fabric on the base material feeding roller (5) passes through the bottom of the balance roller (6) and the bottom of the glue coating roller (21), then passes through the feed port located below, and then passes between the upper pressing roller (27) and the lower pressing roller (28). After being squeezed by the upper pressing roller (27) and the lower pressing roller (28), the fabric passes through the discharge port and is finally wound around the winding roller (14); Step three: by turning on the hot air blower (8) and the cold air blower (9), the upper pressing roller (27) and the lower pressing roller (28) are pressed against each other, and after the two layers of fabric are pressed between the upper pressing roller (27) and the lower pressing roller (28), a composite wall covering is obtained.

Images