A plastic film blowing machine

Abstract

The present invention belongs to the technical field of plastic recycling, and specifically relates to a plastic film blowing machine, which includes a film blowing machine body and a workbench, on which a dust suction assembly, a pressure roller, and a winding roller are installed; the dust suction assembly includes a suction cylinder and a fixed disk, and the suction cylinder is provided with air holes. A fixed plate is installed on the fixed disk, and the fixed plate divides the suction cylinder into an air cavity and a negative pressure cavity, and an arc-shaped orifice plate is installed on the fixed plate. The present invention generates suction in the negative pressure cavity to suck dust and impurities on the surface of the plastic film into the negative pressure cavity through the workbench, thereby cleaning the impurities on the plastic surface. The present invention causes the plastic film to expand in a spherical shape by aligning the through holes on the arc-shaped orifice plate with the air holes on the suction cylinder. The expanded plastic film is pressed by the pressure roller, and the airflow drives the debris inside the film to the outside of the workbench, thereby achieving the purpose of cleaning the impurities inside the plastic film and preventing the winding roller from winding up together with the impurities inside the plastic film, which would cause the impurities to scratch the film.

Description

Technical Field

[0001] The invention belongs to the technical field of plastic recycling, and particularly relates to a plastic film blowing machine. Background Art

[0002] Plastic is a recyclable material. Plastic film is primarily made from recycled plastic. This recycled plastic is sorted and cleaned, then crushed into smaller particles or flakes using a crusher. Using the recycled plastic particles as raw material, plastic film is manufactured through processes such as melting, film blowing, and rolling.

[0003] Blown film is a plastic processing method that refers to a plastic processing technology that heats and melts recycled plastic particles and then blows them into a film. It usually involves extruding the polymer into a tubular film blank. Under good melt flow conditions, the tubular film is blown to the required thickness using high-pressure air. After cooling and shaping, it becomes a film, which is finally flattened and rolled up.

[0004] There are the following technical problems in the plastic film blowing process;

[0005] First, during the plastic film blowing process, the plastic surface will absorb dust and impurities in the air. After the plastic is rolled up, dust and impurities will be mixed in the plastic film, causing defects such as spots and streaks on the film surface, seriously affecting the appearance quality of the film.

[0006] Second, during the process of blowing and forming the plastic tube film, dust, fibers and other impurities in the film blowing workshop enter the tube film through the air inlet of the equipment, causing the impurities to adhere to the inner wall of the tube film. When the plastic is rolled up, the impurities mixed inside the plastic film can easily scratch the film. Summary of the Invention

[0007] The purpose of the present invention is to provide a plastic film blowing machine to solve the technical problems in the prior art.

[0008] The objectives of the present invention can be achieved through the following technical solutions: a plastic film blowing machine, which includes a film blowing machine body and a workbench, a dust suction component is installed on the workbench, and the dust suction component is driven by a variable speed drive box, a pressure roller is installed in the workbench, and the pressure roller is driven by a reciprocating drive member, and the reciprocating drive member drives the pressure roller to move reciprocally, and a winding roller is installed in the workbench, and the plastic blown by the film blowing machine body passes through the dust suction component and the pressure roller in sequence after cooling, and finally the plastic is wound up by the winding roller; the dust suction component is symmetrically arranged, the dust suction component includes a suction cylinder and a fixed disk, the suction cylinder is rotatably installed on the workbench, an air hole is opened on the suction cylinder, and the fixed disk is fixedly installed on the workbench, the fixed disk is located inside the suction cylinder, and a fixed plate is fixedly installed on the fixed disk, the fixed plate divides the suction cylinder into an air cavity and a negative pressure cavity, an arc orifice plate is installed on the fixed plate, and a pressure supply device is installed on the workbench, and the pressure supply device is connected to the negative pressure cavity and the air cavity respectively.

[0009] As a further optimization or improvement of this solution, a chamfer is provided on the outer side of the air hole, and a dust collecting assembly is fixedly installed on the workbench. The dust collecting assembly includes a dust collecting hood, and the dust collecting hood covers the air cavity.

[0010] As a further optimization or improvement of this solution, the dust collecting assembly further includes a pipe row and a dust collecting box, the dust collecting hood is connected to the dust collecting box through the pipe row, and an air filter plate is installed in the dust collecting box.

[0011] As a further optimization or improvement of this solution, the air cavity is connected to the air outlet of the pressure supply device through an air pipe, and the negative pressure cavity is connected to the negative pressure port of the pressure supply device through a negative pressure pipe.

[0012] As a further optimization or improvement of this solution, the reciprocating drive member includes an electric motor, which is fixedly mounted on the workbench. The output end of the motor is connected to the reciprocating screw, which is connected to the transmission sleeve, and the transmission sleeve is connected to the pressure roller through a U-shaped rod.

[0013] As a further optimization or improvement of this solution, a guide groove is provided on the workbench, and the U-shaped rod is slidably engaged with the guide groove.

[0014] As a further optimization or improvement of this solution, the variable speed motor built into the variable speed drive box is connected to the suction cylinders via a transmission belt, and gaps are reserved between the suction cylinders.

[0015] Beneficial effects of the present invention:

[0016] (1) The present invention generates suction through the negative pressure chamber to suck dust and impurities on the surface of the plastic film into the negative pressure chamber through the workbench, thereby cleaning the impurities on the plastic surface;

[0017] Specifically, during the rotation of the suction cylinder, when the through-holes on the arc-shaped perforated plate coincide with the air holes on the suction cylinder, the plastic film between the suction assembly and the pressure roller expands into a spherical shape. As the suction cylinder rotates, the through-holes on the arc-shaped perforated plate and the air holes on the suction cylinder become misaligned, while the reciprocating drive element drives the pressure roller toward the suction assembly, causing it to press the expanded plastic film. As the pressure roller presses out the air inside the expanded plastic film, the airflow pushes debris inside the film toward the outside of the workbench, thereby cleaning impurities from within the plastic film and preventing the reel roller from reeling in impurities inside the plastic film, which could scratch the film.

[0018] (2) The air holes of the present invention are designed such that the outer diameter is larger than the inner diameter. When there are larger impurities on the surface of the plastic film, the larger impurities are stuck in the large-diameter notches on the outer side of the air holes. As the suction cylinder rotates, when the air holes rotate to the air cavity, the air pressure inside the air cavity sends the impurities in the notches on the outer side of the air holes into the dust collecting assembly for collection, thereby preventing larger impurities from being stuck inside the air holes, which would reduce the dust collection efficiency of the dust collection assembly. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] The present invention will be further described below with reference to the accompanying drawings.

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

[0021] Figure 2 for Figure 1 A magnified view of the structure of part A.

[0022] Figure 3 It is a schematic diagram of the structure of the variable speed drive box and reciprocating drive parts.

[0023] Figure 4 This is a schematic diagram of the pressure supply structure.

[0024] Figure 5 Schematic diagram of the internal structure of the workbench.

[0025] Figure 6 This is a diagram of the coordination between the dust suction component and the dust collection component.

[0026] Figure 7 Schematic diagram of the internal structure of the suction cylinder.

[0027] Figure 8 Schematic diagram of the pore structure.

[0028] Figure 9 It is a cross-sectional view of the overall structure of the dust suction component and the dust collection component.

[0029] Figure 10 This is a schematic diagram of the roller pressing process.

[0030] Figure 11It is a schematic diagram of the state after the pressing roller is pressed.

[0031] The following are marked in the figure: 1. Film blowing machine body; 2. Workbench; 3. Dust collection assembly; 301. Suction cylinder; 302. Air hole; 303. Fixed disk; 304. Fixed plate; 305. Arc-shaped orifice plate; 306. Air pipe; 307. Negative pressure pipe; 308. Air cavity; 309. Negative pressure cavity; 4. Variable speed drive box; 5. Reciprocating drive member; 501. Motor; 502. Guide groove; 503. Reciprocating screw; 504. Transmission sleeve; 505. U-shaped rod; 6. Pressing roller; 7. Winding roller; 8. Dust collection assembly; 801. Pipe row; 802. Dust hood; 803. Dust box; 804. Air filter plate; 9. Pressure supply device. DETAILED DESCRIPTION

[0032] The following will clearly and completely describe the technical solutions in the embodiments of the present invention in conjunction with the accompanying drawings. 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 making any creative efforts shall fall within the scope of protection of the present invention.

[0033] See also Figures 1-9 A plastic film blowing machine comprises a film blowing machine body 1 and a workbench 2, a dust suction component 3 is installed on the workbench 2, the dust suction component 3 is driven by a variable speed drive box 4, a pressure roller 6 is installed in the workbench 2, the pressure roller 6 is driven by a reciprocating drive member 5, and the reciprocating drive member 5 drives the pressure roller 6 to move back and forth, a winding roller 7 is installed in the workbench 2, and the plastic blown by the film blowing machine body 1 passes through the dust suction component 3 and the pressure roller 6 in sequence after cooling, and is finally wound up by the winding roller 7; the dust suction components 3 are arranged symmetrically, and the dust suction components 3 include suction rollers. The suction cylinder 301 and the fixed disk 303 are rotatably installed on the workbench 2, and an air hole 302 is opened on the suction cylinder 301. The fixed disk 303 is fixedly installed on the workbench 2, and the fixed disk 303 is located inside the suction cylinder 301. A fixed plate 304 is fixedly installed on the fixed disk 303, and the fixed plate 304 separates the suction cylinder 301 into an air cavity 308 and a negative pressure cavity 309. An arc-shaped orifice plate 305 is installed on the fixed plate 304. A pressure supply device 9 is installed on the workbench 2, and the pressure supply device 9 is connected to the negative pressure cavity 309 and the air cavity 308 respectively.

[0034] Specifically, the air cavity 308 is connected to the air outlet of the pressure supply device 9 through the air pipe 306 , and the negative pressure cavity 309 is connected to the negative pressure port of the pressure supply device 9 through the negative pressure pipe 307 .

[0035] Specifically, the variable speed motor built into the variable speed drive box 4 is connected to the suction cylinders 301 via a transmission belt, and gaps are reserved between the suction cylinders 301 .

[0036] It should be noted that the film blowing machine body 1 melts the recycled plastic particles as raw materials, then extrude the plastic into a tubular film blank, blows the tubular film to the required thickness by high-pressure air, and passes through the dust collection component 3 and the pressure roller 6 in turn after cooling, and finally the plastic is wound up by the winding roller 7.

[0037] During this process, the variable speed drive box 4 drives the suction cylinder 301 to rotate, so that the suction cylinder 301 rolls along the surface of the plastic film. Under the action of the pressure supply device 9, the negative pressure chamber 309 generates suction, and the dust and impurities on the surface of the plastic film are sucked into the negative pressure chamber 309 through the 60 workbench 2. Finally, the impurities are sucked into the pressure supply device 9 through the negative pressure pipe 307, thereby cleaning the impurities on the plastic surface.

[0038] It should be noted that when the through hole on the arc-shaped orifice plate 305 coincides with the air hole 302 on the suction cylinder 301, the suction force inside the negative pressure chamber 309 can all pass through the air hole 302 to adsorb the plastic film, which is a full adsorption state (half of the 60 film blowing machine body 1 adsorbs the plastic film); when the through hole on the arc-shaped orifice plate 305 does not coincide with the air hole 302 on the suction cylinder 301, the suction force inside the negative pressure chamber 309 can only pass through part of the air hole 302 to adsorb the plastic film, which is a semi-adsorption state (one quarter of the 60 film blowing machine body 1 adsorbs the plastic film).

[0039] During the rotation of the suction cylinder 301, since the fixed plate 304 and the arc-shaped orifice plate 305 are in a fixed state, as the suction cylinder 301 rotates, when the through hole on the arc-shaped orifice plate 305 coincides with the air hole 302 on the suction cylinder 301, the suction force inside the negative pressure chamber 309 can completely absorb the plastic film through the air hole 302. Figure 10 At this time, the plastic film between the dust collecting assembly 3 and the pressure roller 6 expands into a spherical shape. Figure 10 The expanded cavity formed is shown.

[0040] As the suction cylinder 301 rotates, the through holes on the arc-shaped orifice plate 305 are staggered with the air holes 302 on the suction cylinder 301. At this time, the suction force inside the negative pressure chamber 309 can only absorb the plastic film through some of the air holes 302. At the same time, the reciprocating drive 5 drives the pressure roller 6 to move closer to the dust collection component 3, so that the pressure roller 6 presses the expanded plastic film, generating airflow inside the expansion cavity. When the pressure roller 6 presses the gas inside the expanded plastic film out, the airflow drives the debris inside the film to the outside of the workbench 2, thereby achieving the purpose of cleaning the impurities inside the plastic film. As the reciprocating drive 5 starts the pressure roller 6 to reset, the pressure roller 6 moves at the same rewinding speed as the winding roller 7. As the reciprocating drive 5 drives the pressure roller 6 to move back and forth, cooperating with the rotation of the suction cylinder 301, the pressure roller 6 repeats the above operation, continuously cleaning the impurities inside the plastic film, and preventing the winding roller 7 from rewinding together with the impurities inside the plastic film, causing the impurities to scratch the film.

[0041] See also Figure 6-Figure 9 The outer side of the air hole 302 is provided with a chamfer, and the dust collecting component 8 is fixedly installed on the workbench 2. The dust collecting component 8 includes a dust collecting cover 802, and the dust collecting cover 802 covers the air cavity 308.

[0042] Specifically, the dust collecting assembly 8 further includes a pipe row 801 and a dust collecting box 803 . The dust collecting cover 802 is connected to the dust collecting box 803 through the pipe row 801 . An air filter plate 804 is installed in the dust collecting box 803 .

[0043] It should be noted that if large impurities are present on the surface of the plastic film, they can easily clog the air holes 302, reducing the dust collection efficiency of the dust collection assembly 3. Therefore, to prevent clogged air holes 302, the air holes 302 are designed with a larger outer diameter than the inner diameter. When large impurities are present on the surface of the plastic film, they become lodged in the large-diameter notches on the outside of the air holes 302. As the suction cylinder 301 rotates, when the air holes 302 rotate to the air cavity 308, the internal air pressure of the air cavity 308 blows the impurities out of the notches on the outside of the air holes 302. The impurities then pass through the dust hood 802 and the tube array 801 into the dust box 803, where they are separated by the air filter plate 804.

[0044] See also Figure 1-Figure 3 The reciprocating drive member 5 includes an electric motor 501, which is fixedly mounted on the workbench 2. The output end of the electric motor 501 is connected to the reciprocating screw 503, and the reciprocating screw 503 is connected to the transmission sleeve 504. The transmission sleeve 504 is connected to the pressure roller 6 through the U-shaped rod 505.

[0045] Specifically, a guide groove 502 is provided on the workbench 2 , and the U-shaped rod 505 is slidably engaged with the guide groove 502 .

[0046] It should be noted that when the present invention is in use, the motor 501 drives the reciprocating screw 503 to rotate, and through the transmission cooperation between the reciprocating screw 503 and the transmission sleeve 504, the reciprocating screw 503 drives the U-shaped rod 505 and the pressure roller 6 to move back and forth along the guide groove 502, and at the same time controls the moving speed of the pressure roller 6 so that the speed of the pressure roller 6 is consistent with the speed of the plastic film wound by the winding roller 7.

[0047] The working principle of the present invention is as follows: the film blowing machine body 1 melts the recycled plastic particles as raw materials, then extrude the plastic into a tubular film blank, blows the tubular film to the required thickness by high-pressure air, and after cooling, passes through the dust collection component 3 and the pressure roller 6 in sequence, and finally is wound up by the winding roller 7.

[0048] During this process, the variable speed drive box 4 drives the suction cylinder 301 to rotate, so that the suction cylinder 301 rolls along the surface of the plastic film. Under the action of the pressure supply device 9, the negative pressure chamber 309 generates suction, and the dust and impurities on the surface of the plastic film are sucked into the negative pressure chamber 309 through the 60 workbench 2. Finally, the impurities are sucked into the pressure supply device 9 through the negative pressure pipe 307, thereby cleaning the impurities on the plastic surface.

[0049] Specifically, during the rotation of the suction cylinder 301, since the fixed plate 304 and the arc-shaped orifice plate 305 are in a fixed state, as the suction cylinder 301 rotates, when the through hole on the arc-shaped orifice plate 305 coincides with the air hole 302 on the suction cylinder 301, the suction force inside the negative pressure chamber 309 can all pass through the air hole 302 to absorb the plastic film. Figure 10 At this time, the plastic film between the dust collecting assembly 3 and the pressure roller 6 expands into a spherical shape. Figure 10 The expanded cavity formed is shown.

[0050] As the suction cylinder 301 rotates, the through holes on the arc-shaped orifice plate 305 are staggered with the air holes 302 on the suction cylinder 301. At this time, the suction force inside the negative pressure chamber 309 can only absorb the plastic film through some of the air holes 302. At the same time, the reciprocating drive member 5 drives the pressure roller 6 to move closer to the dust collection component 3, so that the pressure roller 6 presses the expanded plastic film, generating airflow inside the expansion cavity. When the pressure roller 6 presses the gas inside the expanded plastic film out, the airflow drives the debris inside the film to push to the outside of the workbench 2. Figure 11 , thereby achieving the purpose of cleaning the impurities inside the plastic film. As the reciprocating drive member 5 starts the pressure roller 6 to return, the pressure roller 6 moves at the same rewinding speed as the rewinding roller 7. As the reciprocating drive member 5 drives the pressure roller 6 to move back and forth, cooperating with the rotation of the suction cylinder 301, the pressure roller 6 repeats the above operation, thereby continuously cleaning the impurities inside the plastic film, preventing the rewinding roller 7 from rewinding the impurities inside the plastic film together, causing the impurities to scratch the film.

[0051] Specifically, if large impurities are present on the surface of the plastic film, they can easily clog the air holes 302, reducing the dust collection efficiency of the dust collection assembly 3. Therefore, to prevent clogs in the air holes 302, the air holes 302 are designed with a larger outer diameter than the inner diameter. When large impurities are present on the surface of the plastic film, they become lodged in the large-diameter notches on the outside of the air holes 302. As the suction cylinder 301 rotates, when the air holes 302 rotate to the air cavity 308, the internal pressure of the air cavity 308 blows the impurities out of the notches on the outside of the air holes 302. The impurities then pass through the dust hood 802 and the tube array 801 into the dust box 803, where they are separated by the air filter plate 804.

[0052] The basic principles, main features, and advantages of the present invention are shown and described above. Those skilled in the art should understand that the present invention is not limited to the above embodiments. The above embodiments and descriptions are merely illustrative of the principles of the present invention. Various changes and modifications may be made to the present invention without departing from the spirit and scope of the present invention, and such changes and modifications fall within the scope of the invention as claimed.

Claims

1. A plastic film blowing machine, characterized in that: The invention comprises a film blowing machine body (1) and a workbench (2); a dust collecting assembly (3) is installed on the workbench (2); the dust collecting assembly (3) is driven by a variable speed drive box (4); a pressure roller (6) is installed in the workbench (2); the pressure roller (6) is driven by a reciprocating drive member (5); the reciprocating drive member (5) drives the pressure roller (6) to move back and forth; a winding roller (7) is installed in the workbench (2); the plastic blown by the film blowing machine body (1) passes through the dust collecting assembly (3) and the pressure roller (6) in sequence after cooling, and is finally wound up by the winding roller (7); The dust collection assembly (3) is symmetrically arranged, and comprises a suction cylinder (301) and a fixed disk (303). The suction cylinder (301) is rotatably mounted on the workbench (2), and an air hole (302) is provided on the suction cylinder (301). The fixed disk (303) is fixedly mounted on the workbench (2), and the fixed disk (303) is located inside the suction cylinder (301). A fixed plate (304) is fixedly mounted on the fixed disk (303), and the fixed plate (304) divides the suction cylinder (301) into an air cavity (308) and a negative pressure cavity (309). An arc-shaped orifice plate (305) is mounted on the fixed plate (304). A pressure supply device (9) is mounted on the workbench (2), and the pressure supply device (9) is connected to the negative pressure cavity (309) and the air cavity (308) respectively.

2. A plastic film blowing machine according to claim 1, characterized in that: The outer side of the air hole (302) is provided with a chamfer. A dust collecting assembly (8) is fixedly mounted on the workbench (2). The dust collecting assembly (8) includes a dust collecting cover (802). The dust collecting cover (802) covers the air cavity (308).

3. A plastic film blowing machine according to claim 2, characterized in that: The dust collecting assembly (8) further comprises a pipe row (801) and a dust collecting box (803); the dust collecting cover (802) is connected to the dust collecting box (803) via the pipe row (801); and an air filter plate (804) is installed in the dust collecting box (803).

4. A plastic film blowing machine according to claim 1, characterized in that: The air cavity (308) is connected to the air outlet of the pressure supply device (9) through the air pipe (306), and the negative pressure cavity (309) is connected to the negative pressure port of the pressure supply device (9) through the negative pressure pipe (307).

5. The plastic film blowing machine according to claim 1, characterized in that: The reciprocating drive member (5) comprises an electric motor (501), the electric motor (501) being fixedly mounted on the workbench (2), the output end of the electric motor (501) being connected to a reciprocating screw (503), the reciprocating screw (503) being in transmission connection with a transmission sleeve (504), and the transmission sleeve (504) being connected to a pressure roller (6) via a U-shaped rod (505).

6. The plastic film blowing machine according to claim 1, characterized in that: A guide groove (502) is provided on the workbench (2), and a U-shaped rod (505) is slidably engaged with the guide groove (502).

7. The plastic film blowing machine according to claim 1, characterized in that: The variable speed motor built into the variable speed drive box (4) is connected to the suction cylinder (301) via a transmission belt, and a gap is reserved between the suction cylinders (301).

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