Casting compound equipment for producing PVC (polyvinyl chloride) film and preparation method

Abstract

The invention relates to the technical field of tape-casting compound equipment, and discloses tape-casting compound equipment for producing a PVC film and a preparation method, the tape-casting compound equipment comprises a support structure for providing stability and bearing capacity for the equipment; the extruder is used for heating and melting the PVC raw material; the conveying roller is used for stably conveying the molten PVC film cast from the extruder to the cooling roller or the composite roller; and the positioning roller is used for accurately guiding and positioning the cast PVC film. According to the curtain coating compound equipment for producing the PVC film and the preparation method, the cooling mechanism is arranged, an air blower is started to drive external air to pass through an air inlet and then pass through a refrigerating device, an air inlet telescopic pipe and an air inlet connecting piece to enter a vacuum channel to cool a cutting knife, heat generated by the cutting knife is taken away through air flow in the vacuum channel, and the heat generated by the cutting knife is reduced; therefore, the temperature of the blade is effectively reduced, and the cutting performance of the cutting knife cannot be lost due to overheating in the high-speed cutting process.

Description

Technical Field

[0001] The invention relates to the technical field of casting composite equipment, in particular to a casting composite equipment for producing PVC film and a preparation method thereof. Background Art

[0002] The cast film laminating equipment for PVC film is a machine used to laminate PVC film with other materials. It melts the PVC material through the casting process to form a uniform film, and then laminates it with a substrate (such as paper, cloth or other plastic film) through a laminating system. The main components of the equipment include an extruder, a casting die, a cooling roller, a laminating roller and a winding device. The extruder is responsible for heating and plasticizing the PVC into a molten state, the casting die evenly casts the molten PVC material into a film, the cooling roller cools and shapes the film, the laminating roller closely fits the film to the substrate, and finally the product is collected by the winding device. The equipment has high production efficiency and stability, and is suitable for making PVC composite film products with good adhesion and durability.

[0003] Cast film laminating equipment for PVC film usually needs to be equipped with a cutting mechanism. The cutting mechanism plays the role of trimming and slitting in the process of cast film laminating. The cutting knife is in continuous friction with the PVC film or substrate during high-speed operation. The friction will be continuously converted into heat, causing the temperature of the blade to rise. High temperature will accelerate the wear of the blade material, making its cutting edge blunt, the cutting effect reduced, and even unable to cut through the material. Overheating will cause the blade to deform slightly or expand thermally, causing the cutting line to shift, affecting the accuracy of cutting, and resulting in uneven cutting width and edges. Frequent high temperatures will aggravate the fatigue and embrittlement of the blade material, causing the blade to wear or break more easily, reducing its service life. Summary of the invention

[0004] Technical issues solved In view of the deficiencies in the prior art, the present invention provides a cast composite device and a preparation method for producing PVC film, which solves the problem of increased blade temperature caused by continuous friction between the cutting knife and the PVC film or substrate during high-speed operation.

[0005] (II) Technical solution To achieve the above-mentioned purpose, the present invention provides the following technical solutions: a cast composite device for producing PVC film, comprising a support structure for providing stability and bearing capacity for the device; an extruder for heating and melting PVC raw materials; a transmission roller for smoothly transmitting the molten PVC film cast from the extruder to a cooling roller or a composite roller; a positioning roller for accurately guiding and positioning the cast PVC film; a winding roller for neatly winding the PVC film that has completed the casting and cooling treatment into a roll; a cutting mechanism for accurately cutting the cast PVC film during the production process; a cooling mechanism for cooling the cutting knife; a dust collection mechanism for collecting cutting debris to keep the production environment clean; and a sharpening mechanism for regularly sharpening the cutting knife to keep its sharpness.

[0006] Preferably, the top of the support structure is fixedly connected to an extruder, the top of the support structure is fixedly connected to a transmission roller, the top of the support structure is fixedly connected to a positioning roller, and the top of the support structure is provided with a winding roller.

[0007] Preferably, the cutting mechanism comprises a support frame, the support frame is fixedly connected to the top of the support structure, the outer wall of the support frame is fixedly connected to a telescopic motor, and the bottom of the telescopic motor is fixedly connected to a cutting knife.

[0008] Preferably, the blade of the cutting knife is arranged obliquely, and the bottom of the telescopic motor is fixedly connected to the cutting knife by bolts.

[0009] Preferably, the cooling mechanism includes an air inlet, a blower is fixedly connected to the bottom of the air inlet, a refrigeration device is fixedly connected to the bottom of the refrigeration device, one end of an air inlet telescopic tube is fixedly connected to the bottom of the refrigeration device, an air inlet connecting piece is fixedly connected to the other end of the air inlet telescopic tube, an outer wall of the air inlet connecting piece is fixedly connected to the cutting knife, a vacuum channel is opened on the inner wall of the cutting knife, an outer wall of the cutting knife is fixedly connected to an air outlet connecting piece, an outer wall of the air outlet connecting piece is fixedly connected to one end of the air outlet telescopic tube, and the other end of the air outlet telescopic tube is fixedly connected to an air outlet interface.

[0010] Preferably, the outer wall of the blower is fixedly connected to the outer wall of the support frame, the inner wall of the air inlet connector is communicated with the inner wall of the vacuum channel, and the inner wall of the air outlet connector is communicated with the inner wall of the vacuum channel.

[0011] Preferably, the dust suction mechanism includes a connecting block, the connecting block is fixedly connected to the outer wall of the air outlet interface, the inner wall of the connecting block is provided with a through groove, the inner wall of the connecting block is provided with an adsorption through hole, the outer wall of the connecting block is fixedly connected to the discharge interface, the outer wall of the discharge interface is fixedly connected to a collecting tank, the inner wall of the collecting tank is fixedly connected to a filter screen, the inner wall of the filter screen is rotatably connected to a fan blade, and the shaft of the fan blade is fixedly connected to a cleaning member.

[0012] Preferably, the inner wall of the collection tank is threadedly connected to the outer wall of the discharge interface, and the cleaning member is in close contact with the inner surface of the filter screen.

[0013] Preferably, the sharpening mechanism includes a spring, one end of the spring is fixedly connected to the outer wall of the support frame, the other end of the spring is fixedly connected to a whetstone, the surface of the whetstone is provided with an inclined fitting slope, a sliding column is slidably connected to the inner wall of the whetstone, and a roller is rotatably connected to the inner wall of the whetstone.

[0014] A casting composite preparation method for producing PVC film also includes the following steps: Step 1: PVC particles are fed into the extruder for heating and melting. Then, the molten PVC material is evenly pushed to the casting area through the rotation of the screw. Then, the molten PVC film is smoothly transferred to the cooling roller by the transmission roller for cooling. At the same time, the thickness of the film is uniform and the surface is flat. The setting of the cooling roller can be adjusted according to production requirements to achieve a suitable cooling effect. The positioning roller accurately guides the film to maintain the correct position to avoid deviation or deformation. The winding roller is responsible for winding the processed PVC film into a roll flatly to ensure that the appearance of the finished product is consistent and without looseness or wrinkles. Step 2: When the film is rolled up to a certain extent, the telescopic motor is turned on to drive the cutting knife to move downward to cut the PVC film; Step 3, turning on the blower to drive the outside air to pass through the air inlet, and then enter the vacuum channel through the refrigeration device, the air inlet expansion pipe and the air inlet connector to cool the cutting knife; Step 4: The gas in the cutting blade passes through the gas outlet connector, the gas outlet telescopic tube and the gas outlet interface, enters the through slot, and is then discharged through the discharge interface. At this time, according to Bernoulli's principle, the air flow rate at the adsorption through hole is lower than the flow rate in the through slot, resulting in suction at the adsorption through hole, which adsorbs and removes debris in the working area of ​​the cutting blade; Step 5: When the exhaust interface discharges the air into the collection tank, the excess air in the collection tank is discharged through the filter, leaving the debris to be collected. At the same time, the exhausted air drives the fan blades to rotate, and the fan blades drive the cleaning part to rotate and scrape the inside of the filter to prevent the debris and impurities from clogging the filter and affecting the discharge of air. Step six, when the cutting knife moves downward, the inclined bevel blade of the cutting knife contacts the surface of the inclined bevel, so that the whetstone is subjected to a backward force, causing the whetstone to squeeze the spring to move and sharpen the cutting knife. The debris dropped by the sharpening is absorbed by the dust suction mechanism, so that the cutting knife is always sharper.

[0015] (III) Beneficial effects Compared with the prior art, the present invention provides a casting composite device and a preparation method for producing PVC film, which has the following beneficial effects: 1. The cast composite equipment and preparation method for producing PVC film utilizes a cooling mechanism to open a blower to drive external air through an air inlet, and then enters a vacuum channel through a refrigeration device, an air inlet telescopic tube and an air inlet connector to cool the cutting blade. The heat generated by the cutting blade is taken away by the air flow inside the vacuum channel, thereby effectively reducing the blade temperature to ensure that the cutting blade does not lose its cutting performance due to overheating during high-speed cutting.

[0016] 2. The cast composite equipment and preparation method for producing PVC film utilizes a dust suction mechanism. The gas in the cutting knife passes through the air outlet connector, the air outlet telescopic tube and the air outlet interface, enters the through slot, and is then discharged through the discharge interface. At this time, it can be known from Bernoulli's principle that the air flow rate at the adsorption through hole is lower than the flow rate through the slot, resulting in suction at the adsorption through hole, which adsorbs and removes debris in the working area of ​​the cutting knife. The debris is effectively adsorbed and removed by the chip removal system, which can reduce the friction of the cutting knife, thereby helping to reduce the temperature of the cutting knife, avoid damage to the tool material caused by excessive temperature, extend the service life of the tool, and maintain cutting accuracy.

[0017] 3. The cast composite equipment and preparation method for producing PVC film are provided with a dust suction mechanism. When the exhaust interface discharges air into a collection tank, excess air in the collection tank is discharged through a filter, leaving debris to be collected. At the same time, the exhausted air drives the fan blades to rotate, and the fan blades drive the cleaning parts to rotate. The cleaning parts rotate and scrape the inside of the filter to prevent debris and impurities from clogging the filter and affecting the discharge of air, thereby ensuring that the filter remains unobstructed and is not blocked, thereby ensuring smooth air flow and avoiding the influence of the exhaust efficiency of the system due to the blockage of the filter.

[0018] 4. The cast composite equipment and preparation method for producing PVC film utilizes a sharpening mechanism. When the cutting knife moves downward, the inclined bevel blade of the cutting knife contacts the surface of the inclined fitting bevel, so that the whetstone is subjected to a backward force, causing the whetstone to squeeze the spring to move and sharpen the cutting knife. The debris dropped by the sharpening is absorbed by the dust suction mechanism, so that the cutting knife is always sharper, can cut materials more effectively, reduce the friction of the blade, and have a high cutting efficiency with a sharp blade, which reduces the heat generated during the cutting process, thereby helping to reduce the temperature of the cutting knife. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] Figure 1 This is a schematic diagram of the overall structure of a casting composite device and a preparation method for producing PVC film proposed by the present invention; Figure 2 This is a schematic structural diagram of a casting composite device for producing PVC film and a cutting mechanism of a preparation method proposed by the present invention; Figure 3 This is a schematic diagram of the structure of a cooling mechanism of a casting composite device and a preparation method for producing PVC film proposed by the present invention; Figure 4 A schematic cross-sectional structure diagram of a cutting knife of a casting composite device and a preparation method for producing PVC film proposed by the present invention; Figure 5 This is a schematic structural diagram of a dust collecting mechanism of a casting composite device for producing PVC film and a preparation method proposed by the present invention; Figure 6 This is a schematic diagram of the structure of a casting composite device for producing PVC film and a filter screen for the preparation method proposed by the present invention; Figure 7 This is a schematic structural diagram of a connecting block of a casting composite device and a preparation method for producing PVC film proposed by the present invention; Figure 8 This is a schematic structural diagram of a cleaning part of a casting composite device and a preparation method for producing PVC film proposed by the present invention; Fig. 9 It is a structural schematic diagram of a casting composite equipment and preparation method grindstone for producing PVC film proposed by the present invention; Fig.10 The present invention provides a schematic cross-sectional structure diagram of a whetstone for producing a cast composite device and a preparation method for a PVC film.

[0020] In the figure: 1. supporting structure; 2. extruder; 3. transmission roller; 4. positioning roller; 5. winding roller; 6. cutting mechanism; 61. supporting frame; 62. telescopic motor; 63. cutting knife; 7. cooling mechanism; 71. air inlet; 72. blower; 73. refrigeration device; 74. air inlet telescopic pipe; 75. air inlet connecting piece; 76. vacuum channel; 77. air outlet connecting piece; 78. air outlet telescopic pipe; 79. air outlet interface; 8. dust suction mechanism; 81. connecting block; 82. through groove; 83. adsorption through hole; 84. discharge interface; 85. collecting tank; 86. filter screen; 87. fan blade; 88. cleaning part; 9. sharpening mechanism; 91. spring; 92. whetstone; 93. inclined fitting slope; 94. sliding column; 95. roller. DETAILED DESCRIPTION

[0021] 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.

[0022] See also Figure 1-Figure 10, a casting composite equipment for producing PVC film, including a support structure 1, which is used to provide stability and bearing capacity for the equipment, which ensures that the equipment remains stable during operation and can withstand the weight of each part of the equipment and the force generated during operation; an extruder 2, which is used to heat and melt the PVC raw material, so that it is converted into a molten state with good fluidity so as to be cast into a uniform film, the extruder 2 gradually pushes the PVC particles into the heating zone through the rotation of the screw, completes plasticization and uniform mixing at a certain temperature and pressure, and the molten PVC material is then extruded from the outlet of the extruder 2 to provide a stable and continuous molten material for the subsequent casting process, the temperature and pressure control of the extruder 2 plays an important role in the thickness and quality of the film, and ensures that the prepared PVC film has good flatness and transparency; a transmission roller 3, which is used to smoothly transfer the molten PVC film cast from the extruder 2 to the cooling roller or the composite roller, the transmission roller 3 can ensure that the film maintains uniform tension and speed during movement, and avoids wrinkles or stretching deformation of the film, and at the same time, the transmission roller 3 can also help control the thickness and surface flatness of the film, so that the film is in a stable state before entering the next cooling or composite treatment. The speed of the transmission roller 3 matches the discharge speed of the extruder 2 to ensure the continuity of the entire production process and the stability of the film quality; the positioning roller 4 is used to accurately guide and position the cast PVC film to keep it on the correct path to avoid deviation or deviation during the transmission process. The positioning roller 4 adjusts the direction of the film to ensure that the film maintains a stable position before being transmitted to the cooling roller 4 or the composite roller, thereby improving the alignment accuracy of the film during the composite or winding process. The position and angle of the positioning roller can be flexibly adjusted to meet the needs of films of different widths and ensure the edge of the film is straight. The winding roller 5 is used to neatly roll the PVC film that has completed the casting and cooling process into a roll for subsequent storage, transportation or further processing. The winding roller 5 controls the film by applying appropriate tension so that the film can be rolled evenly and smoothly to avoid wrinkles, looseness or tight edges. The tension of the winding roller 5 can be adjusted according to the film thickness and material properties to ensure consistent winding quality, a smooth appearance and uniform curling of the finished product. At the same time, the rotation speed of the winding roller 5 is synchronized with the transmission speed to ensure that the film maintains continuous and smooth movement throughout the production process;The cutting mechanism 6 is used to accurately cut the cast PVC film during the production process to ensure the control of the film length and the consistency of product specifications. The cutting mechanism can divide the film into required sizes or rolls according to the set length or other standards. It usually includes a high-speed cutting knife 63 or other cutting device 6, which can complete the cutting task under high-speed operation while avoiding damage or deformation to the film surface. The design of the cutting mechanism 6 should ensure that the cutting edge is smooth and burr-free to improve the quality of the finished product and adapt to subsequent processing procedures; the cooling mechanism 7 is used to cool the cutting knife 63 to prevent the cutting knife 63 from overheating due to continuous friction during high-speed operation. Through cooling, the cooling mechanism 7 can effectively reduce the temperature of the cutting knife 63, prevent wear or damage caused by thermal expansion and overheating of the blade, thereby extending the service life of the tool and maintaining cutting accuracy. The cooling mechanism 7 usually includes a coolant circulation system or an air cooling system to ensure that the cutting knife 63 is kept within a suitable operating temperature range to ensure cutting The cutting process is smooth and stable, and quality problems caused by high temperature are prevented; the dust suction mechanism 8 is used to collect the cutting debris to keep the production environment clean. It sucks the debris and dust generated during the cutting process into the dust collector through the dust suction device to prevent the debris from scattering on the equipment and the ground, thereby reducing the risk of equipment failure and ensuring the safety of the operator. The dust suction mechanism 8 can effectively keep the production area clean, improve the comfort of the working environment, and avoid the impact of cutting debris on other equipment or subsequent processing processes; the sharpening mechanism 9 is used to regularly grind the cutting knife 63 to maintain its sharpness. As the cutting process proceeds, the cutting knife 63 will gradually become blunt. The sharpening mechanism 9 automatically or manually grinds the blade to restore its cutting performance, which can ensure that the cutting knife 63 always maintains a good cutting effect, improves cutting accuracy, extends the service life of the cutting knife 63, and reduces the situation of uneven cutting or defective products caused by blade passivation. The sharpening mechanism 9 helps reduce the frequency of tool replacement and improves production efficiency. ;

[0023] The top of the support structure 1 is fixedly connected with an extruder 2, the top of the support structure 1 is fixedly connected with a transmission roller 3, the top of the support structure 1 is fixedly connected with a positioning roller 4, and the top of the support structure 1 is provided with a winding roller 5.

[0024] The cutting mechanism 6 includes a support frame 61, which is fixedly connected to the top of the support structure 1. The outer wall of the support frame 61 is fixedly connected to a telescopic motor 62, and the bottom of the telescopic motor 62 is fixedly connected to a cutting knife 63. The blade of the cutting knife 63 is inclined so that it can reduce the cutting resistance when cutting the PVC film, thereby achieving a smoother and more precise cutting effect. The inclined blade design helps to gradually contact the material, reduce the instantaneous impact force, and reduce the possibility of wrinkles or damage to the film. Such a structure can also extend the service life of the blade and ensure that the cutting edge is smoother, further improving the product quality. The bottom of the telescopic motor 62 is fixedly connected to the cutting knife 63 by bolts, so that the telescopic motor 62 can drive the cutting knife 63 to move up and down, and it is easy to install and replace, which improves the convenience of maintenance. The bolt connection also enhances the firmness of the structure, ensuring the precise positioning of the cutting knife 63 under high-intensity working conditions, which helps to achieve a uniform and precise cutting effect.

[0025] The cooling mechanism 7 includes an air inlet 71, a blower 72 is fixedly connected to the bottom of the air inlet 71, a refrigeration device 73 is fixedly connected to the bottom of the blower 72, one end of an air inlet telescopic tube 74 is fixedly connected to the bottom of the refrigeration device 73, an air inlet connector 75 is fixedly connected to the other end of the air inlet telescopic tube 74, the outer wall of the air inlet connector 75 is fixedly connected to the cutting knife 63, a vacuum channel 76 is provided on the inner wall of the cutting knife 63, an air outlet connector 77 is fixedly connected to the outer wall of the cutting knife 63, one end of an air outlet telescopic tube 78 is fixedly connected to the outer wall of the air outlet connector 77, the other end of the air outlet telescopic tube 78 is fixedly connected to an air outlet interface 79, the outer wall of the blower 72 is fixedly connected to the outer wall of the support frame 61, the inner wall of the air inlet connector 75 is communicated with the inner wall of the vacuum channel 76, and the inner wall of the air outlet connector 77 is communicated with the inner wall of the vacuum channel 76.

[0026] The dust suction mechanism 8 includes a connecting block 81, which is fixedly connected to the outer wall of the air outlet interface 79, a through groove 82 is opened on the inner wall of the connecting block 81, an adsorption through hole 83 is opened on the inner wall of the connecting block 81, the outer wall of the connecting block 81 is fixedly connected to the discharge interface 84, the outer wall of the discharge interface 84 is fixedly connected to the collecting tank 85, the inner wall of the collecting tank 85 is fixedly connected to the filter screen 86, the inner wall of the filter screen 86 is rotatably connected to the fan blade 87, the shaft of the fan blade 87 is fixedly connected to the cleaning piece 88, the inner wall of the collecting tank 85 is threadedly connected to the outer wall of the discharge interface 84, so as to facilitate the disassembly of the collecting tank 85 and make it more convenient during cleaning and maintenance. The threaded connection design not only ensures the sealing between the collecting tank 85 and the discharge interface 84, but also can effectively prevent loosening caused by vibration during use, and the cleaning piece 88 is close to the inner surface of the filter screen 86.

[0027] The sharpening mechanism 9 includes a spring 91, one end of which is fixedly connected to the outer wall of the support frame 61, and the other end of the spring 91 is fixedly connected to a whetstone 92. The surface of the whetstone 92 is provided with an inclined fitting slope 93 for fitting the blade of the inclined cutting knife 63. A sliding column 94 is slidably connected to the inner wall of the whetstone 92, and a roller 95 is rotatably connected to the inner wall of the whetstone 92.

[0028] A casting composite preparation method for producing PVC film also includes the following steps: Step 1: PVC particles are fed into the extruder 2 for heating and melting, and then the molten PVC material is evenly pushed into the casting area by the rotation of the screw. Then, the molten PVC film is smoothly transferred to the cooling roller by the transmission roller 3 for cooling, while ensuring that the thickness of the film is uniform and the surface is flat. The setting of the cooling roller can be adjusted according to production requirements to achieve a suitable cooling effect. The positioning roller 4 accurately guides the film to maintain the correct position to avoid deviation or deformation. The winding roller 5 is responsible for winding the processed PVC film into a roll flatly to ensure that the appearance of the finished product is consistent and has no looseness or wrinkles; Step 2: When the film is rolled up to a certain extent, the telescopic motor 62 is turned on to drive the cutting knife 63 to move downward to cut the PVC film; Step 3: Turn on the blower 72 to drive the outside air to pass through the air inlet 71, and then enter the vacuum channel 76 through the refrigeration device 73, the air inlet telescopic tube 74 and the air inlet connector 75 to cool the cutting blade 63, so as to ensure that the cutting blade 63 does not lose its cutting performance due to overheating during the high-speed cutting process. The air flow provided by the blower 72 directly acts on the outer wall of the cutting blade 63, and the air flow inside the vacuum channel 76 takes away the heat generated by the cutting blade 63, thereby effectively reducing the blade temperature and avoiding the influence of thermal expansion or blade damage on the cutting quality. At the same time, the cooling process can also ensure that the cutting blade 63 is maintained within the optimal working temperature range, thereby improving the cutting accuracy and stability; Step 4: The gas in the cutting knife 63 passes through the gas outlet connector 77, the gas outlet telescopic tube 78 and the gas outlet interface 79, enters the through slot 82, and is then discharged through the discharge interface 84. At this time, it can be known from Bernoulli's principle that the air flow rate at the adsorption through hole 83 is lower than the flow rate in the through slot 82, resulting in suction at the adsorption through hole 83, which adsorbs and removes debris in the working area of ​​the cutting knife 63. This not only helps to keep the blade clean and prevent debris from interfering with the cutting process, but also improves cutting accuracy, extends the service life of the equipment, improves the working environment, and reduces air pollution. In addition, during the cutting process, if the debris is not removed in time, it will rub against the surface of the cutting knife 63, generate additional heat, and increase the temperature of the tool. The debris can be effectively adsorbed and removed by the chip removal system, which can reduce this friction, thereby helping to reduce the temperature of the cutting knife 63, avoid damage to the tool material caused by excessive temperature, extend the service life of the tool, and maintain cutting accuracy. Step 5: When the discharge interface 84 discharges the air into the collection tank 85, the excess air in the collection tank 85 is discharged through the filter 86, leaving the debris to be collected. At the same time, the discharged air drives the fan blade 87 to rotate, and the fan blade 87 drives the cleaning member 88 to rotate. The cleaning member 88 rotates and scrapes the filter 86 to prevent the debris and impurities from clogging the filter 86 and affecting the discharge of air, ensuring that the filter 86 remains unobstructed and is not blocked, thereby ensuring smooth air flow and avoiding the blockage of the filter 86 affecting the exhaust efficiency of the system; Step six, when the cutting knife 63 moves downward, the inclined bevel blade of the cutting knife 63 contacts the surface of the inclined fitting bevel 93, so that the whetstone 92 is subjected to a backward force, so that the whetstone 92 squeezes the spring 91 to move and sharpen the cutting knife 63, and the debris dropped by the sharpening is absorbed by the dust suction mechanism 8, so that the cutting knife 63 is always kept sharper, and the material can be cut more effectively, the friction of the blade is reduced, the sharp blade has high cutting efficiency, and the heat generated during the cutting process is reduced, thereby helping to reduce the temperature of the cutting knife 63.

[0029] It should be noted that, in this article, relational terms such as first and second, etc. are only used to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Moreover, the terms "include", "comprise" or any other variants thereof are intended to cover non-exclusive inclusion, so that a process, method, article or device including a series of elements includes not only those elements, but also other elements not explicitly listed, or also includes elements inherent to such process, method, article or device. In the absence of further restrictions, the elements defined by the sentence "comprise a ..." do not exclude the existence of other identical elements in the process, method, article or device including the elements.

Claims

1. A casting composite equipment for producing PVC film, characterized by: include A support structure (1) for providing stability and load-bearing capacity for the equipment; An extruder (2) is used to heat and melt the PVC raw material; A transfer roller (3) is used to smoothly transfer the molten PVC film cast from the extruder (2) to a cooling roller or a composite roller; Positioning rollers (4) for precisely guiding and positioning the cast PVC film; Winding roller (5) for neatly winding the PVC film that has completed the casting and cooling process into a roll; A cutting mechanism (6) for accurately cutting the cast PVC film during the production process; A cooling mechanism (7) for cooling the cutting blade (63); A dust collecting mechanism (8) for collecting cutting debris to keep the production environment clean; The sharpening mechanism (9) is used for regularly sharpening the cutting knife (63) to maintain its sharpness.

2. The casting laminating device for producing PVC film according to claim 1, characterized in that: The top of the support structure (1) is fixedly connected to an extruder (2), the top of the support structure (1) is fixedly connected to a transmission roller (3), the top of the support structure (1) is fixedly connected to a positioning roller (4), and the top of the support structure (1) is provided with a winding roller (5).

3. The casting laminating device for producing PVC film according to claim 2, characterized in that: The cutting mechanism (6) comprises a support frame (61), the support frame (61) is fixedly connected to the top of the support structure (1), a telescopic motor (62) is fixedly connected to the outer wall of the support frame (61), and a cutting knife (63) is fixedly connected to the bottom of the telescopic motor (62).

4. The casting laminating device for producing PVC film according to claim 3, characterized in that: The blade of the cutting knife (63) is arranged obliquely, and the bottom of the telescopic motor (62) is fixedly connected to the cutting knife (63) by means of bolts.

5. The casting laminating device for producing PVC film according to claim 4, characterized in that: The cooling mechanism (7) includes an air inlet (71), the bottom of the air inlet (71) is fixedly connected to a blower (72), the bottom of the blower (72) is fixedly connected to a refrigeration device (73), the bottom of the refrigeration device (73) is fixedly connected to one end of an air inlet telescopic tube (74), the other end of the air inlet telescopic tube (74) is fixedly connected to an air inlet connector (75), the outer wall of the air inlet connector (75) is fixedly connected to the cutting knife (63), a vacuum channel (76) is provided on the inner wall of the cutting knife (63), the outer wall of the cutting knife (63) is fixedly connected to an air outlet connector (77), the outer wall of the air outlet connector (77) is fixedly connected to one end of an air outlet telescopic tube (78), and the other end of the air outlet telescopic tube (78) is fixedly connected to an air outlet interface (79).

6. The casting laminating device for producing PVC film according to claim 5, characterized in that: The outer wall of the blower (72) is fixedly connected to the outer wall of the support frame (61), the inner wall of the air inlet connector (75) is in communication with the inner wall of the vacuum channel (76), and the inner wall of the air outlet connector (77) is in communication with the inner wall of the vacuum channel (76).

7. The casting laminating device for producing PVC film according to claim 5, characterized in that: The dust collecting mechanism (8) comprises a connecting block (81), the connecting block (81) being fixedly connected to the outer wall of the air outlet interface (79), a through groove (82) being provided on the inner wall of the connecting block (81), an adsorption through hole (83) being provided on the inner wall of the connecting block (81), the outer wall of the connecting block (81) being fixedly connected to the discharge interface (84), the outer wall of the discharge interface (84) being fixedly connected to the collection tank (85), the inner wall of the collection tank (85) being fixedly connected to the filter screen (86), the inner wall of the filter screen (86) being rotatably connected to a fan blade (87), and the shaft of the fan blade (87) being fixedly connected to the cleaning member (88).

8. The casting laminating device for producing PVC film according to claim 7, characterized in that: The inner wall of the collection tank (85) is threadedly connected to the outer wall of the discharge interface (84), and the cleaning member (88) is in close contact with the inner surface of the filter screen (86).

9. The casting laminating device for producing PVC film according to claim 8, characterized in that: The sharpening mechanism (9) comprises a spring (91), one end of the spring (91) is fixedly connected to the outer wall of the support frame (61), the other end of the spring (91) is fixedly connected to a grindstone (92), a surface of the grindstone (92) is provided with an inclined fitting slope (93), a sliding column (94) is slidably connected to the inner wall of the grindstone (92), and a roller (95) is rotatably connected to the inner wall of the grindstone (92).

10. A casting composite preparation method for producing PVC film, characterized in that: The casting composite equipment for producing PVC film according to any one of claims 1 to 9 further comprises the following steps: Step 1: PVC particles are fed into the extruder (2) for heating and melting. The molten PVC material is then evenly pushed into the casting area by the rotation of the screw. The molten PVC film is then smoothly transferred to the cooling roller by the transfer roller (3) for cooling. At the same time, the thickness of the film is ensured to be uniform and the surface is smooth. The setting of the cooling roller can be adjusted according to production requirements to achieve a suitable cooling effect. The positioning roller (4) accurately guides the film to maintain the correct position to avoid deviation or deformation. The winding roller (5) is responsible for winding the processed PVC film into a roll flatly to ensure that the appearance of the finished product is consistent and there is no looseness or wrinkles. Step 2: When the film is rolled up to a certain extent, the telescopic motor (62) is turned on to drive the cutting knife (63) to move downward to cut the PVC film; Step three, turning on the blower (72) to drive the outside air through the air inlet (71), and then through the refrigeration device (73), the air inlet telescopic tube (74) and the air inlet connector (75) into the vacuum channel (76), so as to cool the cutting blade (63); Step 4: The gas in the cutting blade (63) passes through the gas outlet connector (77), the gas outlet telescopic tube (78) and the gas outlet interface (79), enters the through groove (82), and is then discharged through the discharge interface (84). The air flow rate at the adsorption through hole (83) is lower than the flow rate in the through groove (82), resulting in suction at the adsorption through hole (83), which adsorbs and removes debris from the working area of ​​the cutting blade (63); Step 5: When the discharge interface (84) discharges the air into the collection tank (85), the excess air in the collection tank (85) is discharged through the filter (86), leaving debris to be collected. At the same time, the discharged air drives the fan blade (87) to rotate, and the fan blade (87) drives the cleaning member (88) to rotate. The cleaning member (88) rotates and scrapes the inside of the filter (86) to prevent debris and impurities from clogging the filter (86) and affecting the discharge of air; Step 6: When the cutting knife (63) moves downward, the inclined bevel blade of the cutting knife (63) contacts the surface of the inclined fitting bevel (93), so that the whetstone (92) is subjected to a backward force, so that the whetstone (92) squeezes the spring (91) to move and sharpen the cutting knife (63), and the debris dropped by the sharpening is absorbed by the dust collection mechanism (8), so that the cutting knife (63) is always kept sharper.

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