Forming device and forming method of polypropylene casting film

Abstract

The invention belongs to the technical field of plastic processing and forming, and particularly relates to a forming device and a forming method of a polypropylene casting film. Comprising a mounting frame, a feeding port, an extruder, a T-shaped die head, a cooling assembly, a stretching assembly, a corona assembly, a cleaning assembly, a cutting assembly, a winding assembly, a mounting block, rails, a clamping assembly and a moving assembly, the extruder is mounted on one side of the mounting frame, the feeding port is fixedly connected to the upper portion of the extruder, the T-shaped die head is mounted below the extruder, and the rails are mounted on the two sides of the extruder; the cooling assembly, the stretching assembly, the corona assembly, the cleaning assembly and the cutting assembly are sequentially fixed to one side of the extruder, the winding assembly is fixedly installed below the cutting assembly, the two moving assemblies are installed on the inner side of the track and matched with the track, and the two ends of the clamping assembly are fixedly connected with the two moving assemblies. After the clamping assembly clamps the polypropylene casting film, the moving assembly drives the clamping assembly to move forwards along the track, and the polypropylene casting film is wound after the clamping assembly reaches the tail end.

Description

Technical Field

[0001] The invention belongs to the technical field of plastic processing and molding, and specifically relates to a molding device and a molding method for a polypropylene cast film. Background Art

[0002] Polypropylene cast film is a non-stretched, non-directional flat extruded film produced by melt casting and quenching. Compared with blown film, it has the characteristics of fast production speed, high output, good film transparency, glossiness, thickness uniformity, and excellent balance of all-directional properties. At the same time, because it is a flat extruded film, it is widely used in the packaging of textiles, flowers, food, and daily necessities.

[0003] The existing preparation process of polypropylene cast film is to add the raw materials into the extruder, extrude them through the T-die, cool them through the cooling rollers, stretch them by the stretching rollers, and then perform corona treatment through the corona device to change the surface chemical structure of the polypropylene cast film and increase the surface tension of the polypropylene cast film. Finally, the film is wound up. At the beginning of the whole process, the newly produced polypropylene cast film needs to be manually guided to complete the whole process, and finally the winding device provides tension to complete the whole production process.

[0004] However, antioxidants, lubricants and other additives need to be added during the production of polypropylene cast film. The additives will precipitate to the surface when the polypropylene cast film is formed. Direct manual guidance will irritate the skin and cause damage to human skin. Direct manual guidance will cause uneven lateral strength of the polypropylene film due to inconsistent force during stretching. When the film is manually attached to the winding shaft during winding, wrinkles are likely to occur, affecting the appearance and quality of the overall polypropylene film during winding.

[0005] In view of the above situation, in order to overcome the above technical problems, the present invention designs a forming device and a forming method of a polypropylene cast film. Summary of the invention

[0006] The object of the present invention is to provide a forming device and a forming method for a polypropylene cast film, so as to solve the problems that the manual guidance during the production of the polypropylene cast film may irritate the skin of the workers, make the lateral strength of the film uneven, and easily produce wrinkles when winding. By setting a clamping component and a moving component, when the polypropylene cast film is extruded, the clamped cast film moves along a track to the cutting component and is wound by the winding component, so that the cast film is automatically guided instead of the manual guidance, thereby solving the problems caused by the manual guidance.

[0007] To achieve the above object, the present invention provides the following technical solutions:

[0008] A forming device for polypropylene cast film, comprising a mounting frame, a feed inlet, an extruder, a T-die, a cooling component, a stretching component, a corona component, a cleaning component, a cutting component, a winding component, a mounting block, a track, a clamping component, and a moving component. The extruder is mounted on one side of the mounting frame, the feed inlet is fixedly connected to the top of the extruder, the T-die is mounted below the extruder, two mounting blocks are mounted on both sides of the T-die, one end of two tracks is fixedly connected to the bottom of two mounting blocks, the cutting component is fixedly mounted on the other end of the track, the cooling component, the stretching component, the corona component, and the cleaning component are fixed on one side of the extruder in sequence, the winding component is fixedly mounted below the cutting component, two moving components are respectively mounted on the inner side of the track, and cooperate with the track, and the two ends of the clamping component are fixedly connected to the two moving components. After the clamping component clamps the polypropylene cast film, the moving component drives the clamping component to move forward along the track, and the polypropylene cast film is wound up after reaching the end.

[0009] Preferably, the clamping assembly includes an outer shell, an outer clamping plate, an inner clamping plate, a power supply, an electromagnet, a magnetic block, a spring and a temperature sensor, the two outer clamping plates are respectively fixedly connected to the upper and lower sides of the inner wall of the outer shell, one end of the multiple springs is installed on the side of the upper and lower outer clamping plates away from the outer shell, the two inner clamping plates are connected to the other end of the springs respectively, the electromagnet is installed on the side of the upper inner clamping plate close to the outer clamping plate, the magnetic block is installed on the side of the lower inner clamping plate close to the outer clamping plate, and the power supply is fixedly installed on the inner walls at both ends of the outer shell.

[0010] In the above scheme, by setting a temperature sensor, when the polypropylene cast film flows out and contacts the temperature sensor, the power supply is turned on, and the electromagnet fixedly installed on one side of the inner clamping plate will generate magnetic force to attract the magnetic block of the inner clamping plate on the other side, so that the two inner clamping plates are clamped, so that it can drive the polypropylene cast film to move. Through such a setting, the generation of the cast film can be automatically sensed without the need for additional control, and the polypropylene cast film can be clamped more accurately.

[0011] Preferably, the moving assembly includes a slider, a base plate, a second spring, a roller, a motor, a connecting rod, and a rack. The slider is installed on both sides of the clamping assembly, the two base plates are installed on the upper and lower sides of the slider, the two ends of the plurality of second springs are respectively connected to the base plate and one side of the slider, the motor is installed in the slider, the plurality of rollers are respectively rotatably installed around the base plate, one end of the connecting rod is fixedly connected to the slider, and the rack is fixedly connected to the other end of the connecting rod.

[0012] In the above scheme, when the power is turned on, the motor drives the roller to rotate, thereby moving the moving component forward. By setting a spring 2 between the slider and the base plate, the friction between the roller and the track is increased during the movement of the moving component along the track, preventing slipping and relative sliding during the movement. At the same time, the movement trajectory in some places is arc-shaped, and the spring is set to prevent the moving component from getting stuck.

[0013] Preferably, a plurality of connection ports are provided on the inner clamping plate, and the inner clamping plate except for the connection ports is made of metal conductive material, and the connection ports are made of insulating material.

[0014] In the above scheme, when the moving component moves to the end, the electromagnet is powered off, the inner clamp is connected to the power supply, and the inner clamp is opened. The polypropylene cast film passes between the two inner clamps. At this time, static electricity is generated between the polypropylene cast film passing through the inner clamp and adsorbed on the winding component. At the same time, the connection port is made of insulating material to prevent the current generated on the inner clamp from being conducted to other places.

[0015] The cleaning component includes a second shell, a threaded rod, a straight bevel gear, and a cleaning roller. Limiting grooves are provided on both sides of the second shell. Both ends of the cleaning roller are respectively matched with the limiting grooves, and threaded holes are provided at both ends of the cleaning roller. One end of the four threaded rods is symmetrically rotatably installed on the inner side of the second shell and matched with the threaded holes. The two straight bevel gears are respectively fixedly connected to the other end of the threaded rod. The surface of the cleaning roller is made of sponge material and has multiple adsorption holes.

[0016] In the above scheme, when the moving component passes through the cleaning component, the rack on the edge of the moving component drives the straight bevel gear to rotate, and at the same time the threaded rod rotates, driving the cleaning roller to move downward, clamping the polypropylene cast film, and at the same time a limit groove is set to limit the cleaning roller. During the production process of the polypropylene cast film, a lot of additive precipitates will be produced on the surface. Adsorption holes are set on the surface of the cleaning roller, and when the upper and lower cleaning rollers are squeezed, the precipitates on the surface of the polypropylene cast film are adsorbed.

[0017] The cutting assembly includes a shell three, a cutting knife, a side knife, a guide rod, a motor, a stop block, and a side knife holder. The upper inner wall of the shell three is provided with a mounting groove, the cutting knife is mounted in the mounting groove, the motor is fixedly mounted on the inner side of the shell three, the two ends of the guide rod are respectively rotatably mounted on the left and right inner walls of the shell three, the stop block is fixedly mounted on the shell three and fixedly connected to the track, the two side knife holders are symmetrically fixedly mounted on the shell three, the two side knives are respectively slidably mounted in the side knife holders, and the cutting knife has a serrated blade.

[0018] In the above scheme, when the moving component contacts the resistance block, it will stop moving. The polypropylene cast film moves downward under the influence of gravity and passes through the cutting component. The cutting knife is controlled by motor three and cuts once at a fixed interval. The film is wound in cooperation with the winding component. At the same time, the surface of the cutting knife is serrated to ensure that the film will not stick to each other when it is cut. The side knife will pop out after the polypropylene cast film starts to be wound, and the polypropylene film that shrinks will be produced on both sides of the cutting.

[0019] Preferably, two ports are provided at one end of the slider, two interfaces are provided on the stop block to match the ports, the ports are electrically connected to the power supply, and insulating spacers are provided at the two interfaces.

[0020] In the above scheme, when the slider in the moving component contacts the stop block, the port on the slider is connected to the interface. At this time, the motor in the moving component is powered off, the moving component stops moving, and the electromagnet in the clamping component is also powered off. Under the influence of the spring tension, the inner clamp opens, and the interface connects the power supply to the inner clamp, so that static electricity is generated between the inner clamps and adheres to the passing polypropylene cast film, so that it can be adsorbed on the winding component. When the device stops working, the insulating spacer pops up, disconnecting the interface and the port, so that the motor and the electromagnet resume working state.

[0021] Preferably, the two sides of the guide rod are made of easily adsorbed material, and the middle part is made of insulating material.

[0022] In the above scheme, after the side knife cuts the shrunk polypropylene cast film on both sides of the polypropylene cast film, the guide rod absorbs the cut polypropylene cast film on both sides to prevent it from falling onto the winding assembly.

[0023] Preferably, the inner wall surface of the track and the roller surface are arranged in a triangle shape so as to mesh with each other.

[0024] In the above scheme, the inner wall of the track composed of multiple triangles and the roller surface are meshed with each other to prevent relative sliding, thereby affecting the guiding force of the clamping assembly, thereby ensuring the uniformity of the lateral tensile force on the polypropylene cast film and further ensuring the uniform lateral strength of the polypropylene cast film.

[0025] Preferably, the winding assembly includes a bracket, a rotating wheel, a third motor, a winding shaft motor, and a winding shaft. The two rotating wheels are rotatably installed on one side of the bracket at their axes. The multiple winding shafts are arranged in a circle and rotatably installed between the two rotating wheels and pass through the rotating wheels. The winding shaft motor is installed on one side of the rotating wheel and connected to the winding shaft. The winding shaft is made of a material that is easy to electrostatically adsorb, and the rotation speed when idling is greater than the production speed of the polypropylene cast film.

[0026] In the above scheme, when the polypropylene cast film is adsorbed onto the winding shaft, the winding shaft rotates, providing tension to the subsequent polypropylene cast film, driving the subsequent polypropylene cast film to move, and at the same time the idling speed is greater than its generation speed to ensure sufficient tension, and the rotating wheel also rotates slowly. When all the winding shafts are wound up, the shaft rotates one circle.

[0027] A polypropylene cast film forming method, the specific steps comprising:

[0028] S1: After the polypropylene cast film flows out, it will be clamped by the clamping component and driven by the moving component to move along the track.

[0029] S2: The moving component moves forward along the track, driving the clamping component to sequentially pass through the cooling component, stretching component, corona component, cleaning component, and cutting component to perform cooling, stretching, corona, cleaning, and cutting processes on the polypropylene cast film.

[0030] S3: After the moving component contacts the upper block of the cutting component, the port is connected to the interface, the clamping component is opened, and the inner clamp is energized. The polypropylene cast film moves downward under gravity while static electricity is attached to the surface, and is adsorbed and rolled up by the winding component.

[0031] The beneficial effects of the present invention are as follows:

[0032] The existing polypropylene cast film forming device adopts manual guidance during the guidance. In the process of preparing the polypropylene cast film, it is easy to produce insufficient lateral strength of the film, precipitates generated by the film irritating human skin, and wrinkles when rolling. The present invention clamps and guides the extruded polypropylene cast film through cooling, stretching, corona and other links by setting a clamping component and a moving component, and finally guides it to the cutting component for cutting and subsequent rolling. Compared with the manual guidance method, this mechanical guidance method solves the problems caused by manual guidance, makes the whole process more controllable and more accurate, and improves the quality of the polypropylene cast film.

[0033] The present invention sets a port and an interface, and connects the port to a power source. On the one hand, when the moving component reaches the cutting component, the movement can be automatically stopped and the electromagnet can be powered off, so as to open the inner clamping plates and allow the polypropylene cast film to continue to move. On the other hand, the inner clamping plates are energized so that the polypropylene cast film passing through the two inner clamping plates is attached with static electricity, which is convenient for winding. At the same time, an insulating spacer is set to control the reset of the moving component and the clamping component.

[0034] The present invention sets the track surface and the roller surface into a triangle and sets a spring in the moving device. When the moving component moves, not only the resistance is increased so that the moving component does not slide relative to each other, thereby affecting the lateral strength of the polypropylene cast film, but also the moving component does not get stuck in the curved track, thereby improving the reliability of the moving component and extending its service life. BRIEF DESCRIPTION OF THE DRAWINGS

[0035] The above and other aspects of the present invention will now be described, by way of example only, with reference to the accompanying drawings, in which:

[0036] Figure 1 A schematic diagram of the axonometric view of the molding device of the polypropylene cast film of the present invention

[0037] Figure 2 This is an axonometric schematic diagram of the cooling assembly of the present invention;

[0038] Figure 3 It is an axonometric schematic diagram of the stretching assembly of the present invention;

[0039] Figure 4 This is an axonometric schematic diagram of the corona assembly of the present invention;

[0040] Figure 5 It is an axonometric schematic diagram of the clamping assembly of the present invention;

[0041] Figure 6 It is a front view of the clamping assembly of the present invention;

[0042] Figure 7 is a cross-sectional view of the clamping assembly of the present invention;

[0043] Figure 8 This is a schematic diagram of the structure of the mobile assembly of the present invention;

[0044] Fig. 9 This is a schematic diagram of the cleaning component structure of the present invention;

[0045] Fig.10 It is a front view of the cutting assembly of the present invention;

[0046] Fig.11 It is an axonometric schematic diagram of the cutting assembly of the present invention;

[0047] Fig.12 This is an axonometric diagram of the block of the present invention;

[0048] Fig.13 It is a schematic diagram of the structure of the winding assembly of the present invention.

[0049] In the figure:

[0050] 1. Mounting frame;

[0051] 2. Feeding port;

[0052] 3. Extruder;

[0053] 4. T-die head;

[0054] 5. Cooling assembly; 51. Cooling roller mounting frame; 52. Rotating shaft; 53. Cooling roller connecting rod; 54. Cooling roller; 55. Large gear;

[0055] 6. stretching assembly; 61. stretching roller mounting frame; 62. driven gear 1; 63. stretching roller connecting rod; 64. stretching roller;

[0056] 7. Corona assembly; 71. Corona box; 72. Threaded rod 1; 73. Straight bevel gear 1; 74. Driven gear 2; 75. Corona table; 76. Corona roller;

[0057] 8. Cleaning assembly; 81. Shell 2; 82. Threaded rod 2; 83. Straight bevel gear 2; 84. Cleaning roller;

[0058] 841, thread groove; 842, adsorption hole;

[0059] 9. Cutting assembly; 91. Shell three; 92. Cutting knife; 93. Side knife; 94. Guide rod; 95. Motor two; 96. Stop block; 961. Interface; 962. Insulating spacer; 97. Side knife holder;

[0060] 10. Rewinding assembly; 101. Bracket; 102. Rotating wheel; 103. Motor 3; 105. Rewinding shaft motor; 105. Rewinding shaft;

[0061] 11. Install the block;

[0062] 12. Track;

[0063] 13. Clamping assembly; 131. Shell 1; 132. Outer clamping plate; 133. Inner clamping plate; 1331. Connecting port; 134. Power supply; 135. Electromagnet; 136. Magnetic block; 137. Spring 1; 138. Temperature sensor;

[0064] 14. Moving assembly; 141. Slider; 1411. Port; 142. Bottom plate; 143. Spring 2; 144. Roller; 145. Motor 1; 146. Connecting rod; 147. Rack; DETAILED DESCRIPTION

[0065] In order to better understand the above technical solution, the above technical solution will be described in detail below in conjunction with the accompanying drawings and specific implementation methods.

[0066] As an embodiment of the present invention, reference Figure 1A forming device for polypropylene cast film comprises a mounting frame 1, a feed port 2, an extruder 3, a T-die 4, a cooling component 5, a stretching component 6, a corona component 7, a cleaning component 8, a cutting component 9, and a winding component 10, and also comprises a mounting block 11, a track 12, a clamping component 13, and a moving component 14. The extruder 3 is mounted on one side of the mounting frame 1, the feed port 2 is fixedly connected just above the extruder 3, the T-die 4 is mounted below the extruder 3, two mounting blocks 11 are respectively mounted on both sides of the T-die 4, one end of two tracks 12 are respectively fixedly connected below the two mounting blocks 11, the cutting component 9 is fixedly mounted on the other end of the track 12, the cooling component 5, the stretching component 6, the corona component 7, and the cleaning component 8 are successively fixedly mounted on one side of the extruder 3, the winding component 10 is fixedly mounted below the cutting component 9, and two moving components 14 are symmetrically mounted on the inner side of the track 12 to cooperate with the track, and the two ends of the clamping component 13 are respectively fixedly connected to the two moving components 14. When the polypropylene cast film is extruded from the T-die 4, the clamping assembly 13 clamps the polypropylene cast film and is driven by the moving assembly 14 along the track 12 to pass through the cooling assembly 5, the stretching assembly 6, the corona assembly 7, and the cleaning assembly 8 in sequence to cool, stretch, corona and clean the polypropylene cast film; and stops at the cutting assembly 9 and opens to allow the polypropylene cast film to continue to be wound up.

[0067] As an embodiment of the present invention, reference Figure 2 The cooling assembly 5 includes a cooling roller mounting frame 51, a rotating shaft 52, a cooling roller connecting rod 53, a cooling roller 54, and a large gear 55. One end of the rotating shaft 52 is rotatably mounted on one side of the cooling roller mounting frame 51, one end of the cooling roller connecting rod 53 is fixedly connected to the rotating shaft 52, and one end of the cooling roller 54 is fixedly connected to the cooling roller connecting rod 53. The large gear 55 is fixedly connected to one side of the cooling roller connecting rod 53 and is coaxial with the rotating shaft 52. When the moving assembly 14 drives the clamping assembly 13 along the track to pass through the large gear 55, it will drive the large gear 55 to rotate, so that the cooling roller 54 moves downward, presses the passing polypropylene cast film and cools it. After the production is completed, when the moving assembly 14 returns, it will first contact the large gear 55, drive the cooling roller 54 to move upward, and then pass under the cooling roller 54 to prevent the cooling roller 54 and the clamping assembly 13 from colliding.

[0068] As an embodiment of the present invention, reference Figure 3The stretching assembly 6 includes a stretching roller mounting frame 61, a driven gear 62, a stretching roller connecting rod 63, and a stretching roller 64. Eight driven gears 62 are symmetrically mounted on the left and right sides of the stretching roller mounting frame 61. The driven gear 62 on one side is arranged in a rectangular shape. The stretching roller connecting rod 63 is fixedly mounted on the driven gear 62. Both ends of the stretching roller 64 are rotatably connected to the stretching roller connecting rod 63. When the moving assembly 14 drives the clamping assembly 13 along the track 12 to pass through the driven gear 62, the driven gear 62 rotates accordingly, and the upper and lower stretching rollers 64 are respectively driven to move toward the middle to clamp the polypropylene cast film, and rotate as the polypropylene cast film moves forward to achieve stretching of the polypropylene cast film.

[0069] As an embodiment of the present invention, reference Figure 4 The corona assembly includes a corona box 71, a threaded rod 72, a straight bevel gear 73, a driven gear 74, a corona table 75, and a corona roller 76. One end of multiple groups of threaded rods 72 are symmetrically rotatably mounted on the inner wall of the corona box 71, and multiple straight bevel gears 73 are fixedly mounted on the other end of the threaded rod 72. Multiple driven gears 74 are rotatably connected to the inner walls of the left and right sides of the corona box 71 and mesh with the straight bevel gear 73. The corona table 75 is fixedly mounted on the bottom end of the corona box 71. Both ends of the corona roller 76 cooperate with the threaded rod 72. When the moving assembly 14 drives the clamping assembly 13 along the track 12 to pass through the driven gear 74, the driven gear 74 will rotate accordingly, driving the straight bevel gear 73 and the threaded rod 72 to rotate, and the corona roller 76 moves downward accordingly, cooperating with the corona table 75, and performing corona treatment on the passing polypropylene cast film;

[0070] As an embodiment of the present invention, reference Figures 5 to 7 The clamping assembly 13 includes a shell 131, an outer clamping plate 132, an inner clamping plate 133, a power supply 134, an electromagnet 135, a magnetic block 136, a spring 137, and a temperature sensor 138. The two outer clamping plates 132 are respectively fixedly connected to the upper and lower sides of the inner wall of the shell 131, and the two inner clamping plates 133 are fixedly installed on the inner side of the outer clamping plate 132. The two ends of the multiple springs 137 are respectively fixedly connected to one side of the outer clamping plate 132 and the inner clamping plate 133. The electromagnet 135 is installed on the upper inner clamping plate 13 3 is close to the side of the outer clamping plate 132, the magnetic block 136 is installed on the side of the lower inner clamping plate 133 close to the outer clamping plate 132, the power supply 134 is fixedly installed on the inner walls of both ends of the shell 131, and the temperature sensor 138 is fixedly installed on the inner side of the inner clamping plate 133. When the polypropylene cast film flows out and contacts the temperature sensor 138 on the inner clamping plate 133, the electromagnet 135 is energized to attract the magnetic block 136, so that the upper and lower inner clamping plates 133 are clamped to clamp the newly generated polypropylene cast film.

[0071] As an embodiment of the present invention, reference Figure 8 The moving assembly 14 includes a slider 141, a bottom plate 142, a spring 143, a roller 144, a motor 145, a connecting rod 146, and a rack 147. The slider 141 is installed on both sides of the clamping assembly 13. The two bottom plates 142 are installed on the upper and lower sides of the slider 141. The two ends of the multiple springs 143 are respectively connected to the bottom plate 142 and one side of the slider 141. The motor 145 is installed in the slider 141. The multiple rollers 144 are respectively rotatably installed around the bottom plate 142. One end of the connecting rod 146 is fixedly connected to the slider 141, and the rack 147 is fixedly connected to the other end of the connecting rod 146. When the clamping assembly 13 clamps the polypropylene cast film, the motor 145 drives the roller 144 to move, so that the moving assembly 14 moves forward along the track 12. At the same time, the edge rack 147 cooperates with the cooling assembly 5, the stretching assembly 6, the corona assembly 7, and the cleaning assembly 8 to drive them to move. The inner wall surface of the track 12 and the surface of the roller 144 are arranged in a triangle shape and mesh with each other.

[0072] As an embodiment of the present invention, reference Fig. 9 The cleaning assembly 8 comprises a second housing 81, a second threaded rod 82, a second straight bevel gear 83, and a cleaning roller 84. The two ends of the cleaning roller 84 are respectively connected to the second housing 81 for sliding, and the two ends of the cleaning roller 84 are provided with thread grooves 841. One end of the four threaded rods 82 is symmetrically mounted on the inner side of the second housing 81 to cooperate with the thread grooves 841. The two second straight bevel gears 83 are respectively fixedly connected to the other end of the second threaded rod 82. The surface of the cleaning roller 84 is made of sponge material and is provided with a plurality of adsorption holes 842. When the moving assembly 14 passes the second straight bevel gear 83 along the track 12, it will drive the second straight bevel gear 83 to rotate, thereby driving the cleaning rollers 84 on the upper and lower sides to move toward the middle, thereby clamping the polypropylene cast film and cleaning its surface. At the same time, the surface of the cleaning roller 84 is provided with a plurality of adsorption holes 842. When the cleaning roller 84 rotates on the surface of the polypropylene cast film, it can adsorb additive impurities precipitated on the surface.

[0073] As an embodiment of the present invention, reference Fig.10The cutting assembly 9 includes a shell three 91, a cutting knife 92, a side knife 93, a guide rod 94, a motor two 95, a stop block 96, and a side knife holder 97. The cutting knife 92 is slidably mounted in the upper wall of the shell three 91, the motor is fixedly mounted on the inner side of the shell three 91, the two ends of the guide rod 94 are rotatably mounted on the left and right walls of the inner side of the shell three 91, the stop block 96 is fixedly mounted on the shell three 91 and fixedly connected to the track 12, the two side knife holders 97 are symmetrically fixedly mounted on the shell three 91, the two side knives 93 are respectively slidably mounted in the side knife holders 97, the two motors two 95 are fixedly mounted on one side of the side knife holder 97, and the cutting knife 92 has a serrated blade. When the moving assembly 14 contacts the cutting assembly 9, the cutting knife 92 cuts once at a fixed interval, and the interval time is the time for a single reel 105 to complete reeling. The side knife 93 is controlled by the motor 2 95. After the polypropylene film is adsorbed by the reel 105, the reel 105 is pulled to move the polypropylene film, and the resistance becomes larger. At this time, the side knife 93 pops out and cuts the polypropylene cast film that shrinks on both sides. Before the cutting knife 92 cuts, the side knife 93 is retracted. The two sides of the guide rod 94 are made of easily adsorbed materials, and the middle part is made of insulating materials. Therefore, the polypropylene cast film cut by the side knife 93 will be guided and collected by the guide rod 94 to prevent it from being collected on the reel 105 together with other polypropylene cast films.

[0074] As an embodiment of the present invention, reference Figure 8 , Fig.11 and Fig.12 , two ports 1411 are provided at one end of the slider 141, and two interfaces 961 are provided on the stop block 96 to match the ports 1411. One end of the port 1411 is electrically connected to the power supply 134, and the other end is connected to the inner clamping plate 133. Insulating spacers 962 are provided at the two interfaces 961. When the moving component 14 contacts the cutting component 9, the port 1411 and the interface 961 are connected. At this time, the motor 145 on the moving component 14 and the electromagnet 135 on the clamping component 13 are disconnected from the power supply 134. At this time, the moving component 14 stops moving, and the inner clamping plate 133 Open, and at the same time, the power supply 134 and the inner clamping plate 133 are connected through the port 1411. Because a plurality of connection ports 1331 are provided on the inner clamping plate 133, the inner clamping plate 133 is made of metal conductive material except the connection port 1331, and the connection port 1331 is made of insulating material. At this time, the surface of the inner clamping plate 133 is energized, and static electricity is generated between the upper and lower inner clamping plates 133, so that static electricity is generated on the surface of the passing polypropylene cast film, which is convenient for winding. When the production is completed, the insulating spacer 962 pops up and disconnects the connection between the port 1411 and the interface 961. At this time, the motor 145 resumes power supply, so that the moving component 14 can be reset.

[0075] As an embodiment of the present invention, reference Fig.13The winding assembly includes a bracket 101, a rotating wheel 102, a motor 3 103, a winding shaft motor 104, and a winding shaft 105. The two rotating wheels 102 are rotatably mounted on one side of the bracket 101 at the axis center, and a plurality of the winding shafts 105 are rotatably mounted between the two rotating wheels 102 in a circular arrangement. The motor 3 103 is fixedly mounted between the two brackets 101, and a plurality of winding shaft motors 104 are mounted on one side of the rotating wheel 102 and are fixedly connected to the winding shaft 105. The winding shaft 105 uses a material that is easy to be electrostatically adsorbed, and the self-rotation speed when idling is greater than the production speed of the polypropylene cast film. When the polypropylene cast film is adsorbed on the winding shaft 105, the winding shaft 105 will generate a pulling force on the polypropylene cast film because the rotation speed is greater than the production speed, so as to drive the polypropylene cast film to be produced subsequently, and the rotating wheel 102 is driven to rotate slowly therewith. Whenever a winding shaft 105 completes winding, the next winding shaft 105 will rotate to the right below the cutting assembly 9 to start the next winding.

[0076] Working process: After the polypropylene cast film is extruded by the T-die 4, the clamping component 13 senses and clamps the polypropylene cast film through the temperature sensor 138, and the moving component 14 drives the polypropylene cast film through cooling, stretching, corona, cleaning and other links, and stops at the cutting component 9. At this time, the moving component 14 is powered off, and the inner clamping plate 133 in the clamping component 13 is opened and powered on to attach static electricity to the passing polypropylene cast film, and finally the winding component 10 automatically winds it up. After the winding component 10 finishes winding, the moving component 14 is powered on and returns, and drives the cooling component 5, the stretching component 6, the corona component 7, and the cleaning component 8 to reset.

[0077] Specifically, when the polypropylene cast film is extruded, refer to Figures 5 to 8 , the temperature sensor 138 contacts the polypropylene cast film, the power supply 134 energizes the electromagnet 135, and the electromagnet 135 attracts the magnetic block 136. At this time, the left and right inner clamps 133 clamp the polypropylene cast film, and the power supply 134 simultaneously supplies power to the motor 145, driving the roller 144 to move forward along the track 12, passing through the cooling component 5, the stretching component 6, the corona component 7, and the cleaning component 8. Figure 2 and Figure 8 When passing through the cooling assembly 5, the outer rack 147 of the moving assembly 14 drives the large gear 55 to rotate, and at the same time, the cooling roller connecting rod 53 rotates accordingly, and the cooling roller 54 moves downward, close to the polypropylene cast film and rotates accordingly, refer to Figure 3 and Figure 8 When the moving assembly 14 passes through the stretching assembly 6, the rack 147 drives the driven gear 1 62 to rotate, thereby driving the upper and lower stretching rods 64 to clamp the polypropylene cast film. The front two sets of stretching rods 64 are clamped and rotated at the same speed at the same time to stretch the polypropylene cast film. Figure 4 and Figure 8When the moving assembly 14 passes through the corona assembly 7, it drives the driven gear 2 74 to rotate, thereby driving the corona roller 76 to move downward, and cooperate with the corona stage 75 to perform corona treatment on the polypropylene cast film. Figure 8 and Fig. 9 When passing the cleaning assembly 8, the rack 147 drives the straight bevel gear 2 83 to rotate, driving the upper and lower cleaning rollers 84 to move toward the middle, clamping the polypropylene cast film to clean its surface. When the moving assembly 14 moves to the end of the track 12 and contacts the stop block 96, refer to Figure 8 , Figures 10 to 12 , the port 1411 on the moving component 14 is connected to the interface 961 on the block 96, at this time, the motor 145 on the moving component 14 and the electromagnet 135 on the clamping component 13 are disconnected from the power supply 134, at this time, the moving component 14 stops moving, and the inner clamping plate 133 opens, and at the same time, the power supply 134 and the inner clamping plate 133 are connected through the port 1411, because a plurality of connection ports 1331 are provided on the inner clamping plate 133, and the inner clamping plate 133 is made of metal conductive material except the connection port 1331, and the connection port 1331 is made of insulating material, at this time, the surface of the inner clamping plate 133 is energized, and static electricity is generated between the upper and lower inner clamping plates 133, so that static electricity is generated on the surface of the passing polypropylene cast film, reference Fig.13 When the polypropylene cast film is adsorbed onto the take-up shaft 105, the take-up shaft motor 104 drives the take-up shaft 105 to rotate and the surface rotation linear speed of the take-up shaft 105 is greater than the outflow speed of the polypropylene cast film. Because the rotation speed of the take-up shaft 105 is greater than the production speed of the polypropylene cast film, when the polypropylene cast film is completely attached to the surface of the take-up shaft 105, the take-up shaft 105 continues to rotate and generates a pulling force on the polypropylene cast film to drive the subsequent production of the polypropylene cast film. At the same time, the motor three 103 drives the rotating wheel 102 to rotate slowly. Whenever a take-up shaft 105 completes winding, the next take-up shaft 105 will rotate to the bottom of the cutting assembly 9 to start the next winding.

[0078] 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 are only for explaining the principles of the present invention. Without departing from the spirit and scope of the present invention, the present invention may have various changes and improvements, which fall within the scope of the present invention to be protected, and the scope of the present invention to be protected is defined by the attached claims and their equivalents.

Claims

1. A polypropylene cast film forming device, comprising a mounting frame (1), a feed port (2), an extruder (3), a T-die (4), a cooling assembly (5), a stretching assembly (6), a corona assembly (7), a cleaning assembly (8), a cutting assembly (9), and a winding assembly (10), characterized in that: The invention also comprises a mounting block (11), a track (12), a clamping assembly (13), and a moving assembly (14); the extruder (3) is mounted on one side of the mounting frame (1); the feed port (2) is fixedly connected to the top of the extruder (3); the T-die (4) is mounted below the extruder (3); two mounting blocks (11) are respectively mounted on both sides of the T-die (4); one end of the two tracks (12) is respectively fixedly connected to the bottom of the two mounting blocks (11); the cutting assembly (9) is fixedly mounted on the other end of the track (12); the cooling assembly (5), the stretching assembly (6), and the corona assembly (7) are fixedly connected to the bottom of the two mounting blocks (11); The component (7) and the cleaning component (8) are fixedly installed on one side of the extruder (3) in sequence, the winding component (10) is fixedly installed below the cutting component (9), the two moving components (14) are symmetrically installed on the inner side of the track (12) and cooperate with the track (12), the two ends of the clamping component (13) are respectively fixedly connected to the two moving components (14), and after the clamping component (13) clamps the polypropylene cast film, it is driven by the moving component (14) along the track (12) to pass through the cooling component (5), the stretching component (6), the corona component (7), the cleaning component (8) in sequence and is released at the cutting component (9).

2. A forming device for a polypropylene cast film according to claim 1, characterized in that: The clamping assembly (13) comprises a shell (131), an outer clamping plate (132), an inner clamping plate (133), a power source (134), an electromagnet (135), a magnetic block (136), a spring (137), and a temperature sensor (138). The two outer clamping plates (132) are respectively fixedly connected to the upper and lower sides of the inner wall of the shell (131), the two inner clamping plates (133) are fixedly installed on the inner side of the outer clamping plate (132), and the two ends of the spring (137) are fixedly connected to the inner side of the outer clamping plate (132). They are respectively fixedly connected to one side of the outer clamping plate (132) and the inner clamping plate (133), the electromagnet (134) is installed on the side of the upper inner clamping plate (133) close to the outer clamping plate (132), the magnetic block (136) is installed on the side of the lower inner clamping plate (133) close to the outer clamping plate (132), the power supply (134) is fixedly installed on the inner walls at both ends of the outer shell (131), and the temperature sensor (138) is fixedly installed on the inner side of the inner clamping plate (133).

3. A forming device for a polypropylene cast film according to claim 2, characterized in that: The moving assembly (14) comprises a slider (141), a base plate (142), a spring (143), a roller (144), a motor (145), a connecting rod (146), and a rack (147). The slider (141) is mounted on both sides of the clamping assembly (13). The two base plates (142) are mounted on the upper and lower sides of the slider (141). The two ends of the plurality of springs (143) are respectively connected to one side of the base plate (142) and the slider (141). The motor (145) is mounted in the slider (141). The plurality of rollers (144) are respectively rotatably mounted around the base plate (142). One end of the connecting rod (146) is fixedly connected to the slider (141), and the rack (147) is fixedly connected to the other end of the connecting rod (146).

4. A forming device for a polypropylene cast film according to claim 2, characterized in that: The inner clamping plate (133) is provided with a plurality of connection ports (1331). The inner clamping plate (133) is made of a metal conductive material except for the connection ports (1331), and the connection ports (1331) are made of an insulating material.

5. The forming device of a polypropylene cast film according to claim 1, characterized in that: The cleaning assembly (8) comprises a second shell (81), a second threaded rod (82), a second straight bevel gear (83), and a cleaning roller (84). The two ends of the cleaning roller (84) are slidably connected to the two sides of the second shell (81), and threaded holes (841) are provided at both ends of the cleaning roller (84). One end of the four second threaded rods (82) is symmetrically rotatably mounted on the inner side of the second shell (81) and matched with the threaded holes (841). The two second straight bevel gears (83) are respectively fixedly connected to the other end of the second threaded rod (82). The surface of the cleaning roller (84) is made of sponge material and is provided with a plurality of adsorption holes (842).

6. A forming device for a polypropylene cast film according to claim 1, characterized in that: The cutting assembly (9) comprises a shell three (91), a cutting knife (92), a side knife (93), a guide rod (94), a motor two (95), a stop block (96), and a knife holder (97). The cutting knife (92) is slidably connected to the upper wall of the shell three (91). The two ends of the guide rod (94) are rotatably mounted on the left and right inner walls of the shell three (91). The stop block (96) is fixedly mounted on the shell three (91) and fixedly connected to the track (12). The two knife holders (97) are symmetrically fixedly mounted on the shell three (91). The two side knives (93) are respectively slidably mounted in the knife holder (97). The two motors two (95) are fixedly mounted on one side of the knife holder (97). The cutting edge of the cutting knife (92) is serrated.

7. A forming device for a polypropylene cast film according to claim 3 and claim 6, characterized in that: Two ports (1411) are provided at one end of the slider (141), two interfaces (961) are provided on the stop block (96) and are matched with the ports (1411), the ports (1411) are electrically connected to the power source (134), and insulating spacers (962) are provided at the two interfaces (961).

8. A forming device for a polypropylene cast film according to claim 6, characterized in that: The two sides of the guide rod (94) are made of easily adsorbed material, and the middle part is made of insulating material.

9. A forming device for a polypropylene cast film according to claim 3, characterized in that: The inner wall surface of the track (12) and the surface of the roller (144) are arranged in a triangle shape and mesh with each other.

10. A polypropylene cast film forming method, applicable to a polypropylene cast film forming device as claimed in any one of claims 1 to 9, characterized in that: The steps include: S1: After the polypropylene cast film flows out, it will be clamped by the clamping component (13) and driven by the moving component (14) to move along the track (12); S2: The moving assembly (14) moves forward along the track (12), driving the clamping assembly (13) to sequentially pass through the cooling assembly (5), the stretching assembly (6), the corona assembly (7), the cleaning assembly (8), and the cutting assembly (9) to perform cooling, stretching, corona, cleaning, and cutting processes on the polypropylene cast film; S3: After the moving component (13) contacts the upper block (96) of the cutting component (9), the port (1411) is connected to the interface (961), the clamping component (13) is opened, and the inner clamping plate (133) is energized. The polypropylene cast film moves downward under gravity and static electricity is attached to the surface, and is adsorbed and rolled up by the winding component (10).

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