Plastic film slitting device

Abstract

The utility model relates to the field of bag making machine devices, in particular to a plastic film slitting device which comprises a rack, a plurality of sliding rods are fixed to the rack, a plurality of slitting mechanisms are arranged on the sliding rods, each slitting mechanism comprises a heat sealing device arranged on the corresponding sliding rod, and a supporting device is further arranged on one side of each heat sealing device. A blade is fixed to one side of each heat sealing device, the supporting device comprises a supporting plate, a plurality of supporting shafts are fixed to the supporting plate, supporting wheels are arranged on the supporting shafts, a supporting synchronous belt is further arranged on one side of the supporting plate and sequentially wound around the supporting wheels to be connected in an end-to-end mode, and each heat sealing device comprises a sliding table. A heat sealing air cylinder is fixed to the sliding table, a sliding plate is fixed to the tail end of a piston rod of the heat sealing air cylinder, and a positioning rod is fixed to the sliding plate. A large columnar film is cut into a plurality of small columnar films through the device, multiple rolls of films are produced at a time, and the production efficiency of the film rolls is greatly improved.

Description

Technical Field

[0001] The invention relates to the field of bag making machine devices, in particular to a plastic film slitting device. Background Art

[0002] A bag making machine is a machine for making various plastic packaging bags or other material packaging bags. Its processing range is packaging bags of various sizes, thicknesses and specifications of plastics or other materials. Generally speaking, plastic packaging bags are the main products. When producing plastic packaging bags, it is necessary to use a film blowing machine to produce columnar films, and process the columnar films into corresponding packaging bags. Patent application number: CN202322577854.3 discloses a film blowing machine, including a frame, a mounting frame is provided on the frame, and a turntable is rotatably connected to the mounting frame; an extruder is mounted on the frame and arranged on the lower side of the turntable; a cooling device for blowing the molten plastic into a film is provided at the die head of the extruder for providing molten plastic; a traction mechanism, including a support frame, a pressure roller assembly for pressing the film blown out by the cooling device, and a guide assembly for conveying the pressed film; the lower end of the support frame is fixedly connected to the mounting frame, and the upper end of the support frame is rotatably connected to the guide assembly, and the guide assembly and the pressure roller assembly are transmitted to each other. A dynamic connection is used to drive the pressure roller assembly to rotate, the pressure roller assembly is installed on the turntable, and a winding mechanism is also provided on the frame, the winding mechanism includes a winding motor and a winding roller for storing the film after the pressing process; the plastic particles are put into the extruder and then the plastic particles are heated, the screw arranged in the extruder drives the molten plastic to be transported forward, and then extruded from the die head, the die head is connected with a cooling device, the plastic extruded from the die head forms a columnar film structure through the cooling device, the columnar film is pressed into a sheet film when passing through the pressure roller assembly of the traction mechanism, and when the winding mechanism rolls up and stores the film, the columnar film is rolled up and supplied to the bag making machine to make packaging bags, but this type of film blowing machine can only produce one roll of film at a time, and the production efficiency is low.

[0003] The present invention is proposed in view of the deficiencies in the prior art. Summary of the invention

[0004] The purpose of the present invention is to overcome the above-mentioned disadvantages of the prior art and provide a plastic film slitting device.

[0005] The present invention can be implemented by the following technical solutions:

[0006] The invention discloses a plastic film slitting device, comprising a frame, a plurality of slide bars are fixed on the frame, a plurality of slitting mechanisms are arranged on the slide bars, the slitting mechanisms comprise a heat sealing device arranged on the slide bars, a supporting device is further arranged on one side of the heat sealing device, a blade is fixed on one side of each of the heat sealing devices, the supporting device comprises a supporting plate, a plurality of supporting shafts are fixed on the supporting plate, a supporting wheel is arranged on each of the supporting shafts, a supporting synchronous belt is further arranged on one side of the supporting plate, the supporting synchronous belt passes around each of the supporting wheels in sequence and then ends and connects, the heat sealing device comprises a sliding table, a heat sealing cylinder is fixed on the sliding table, a slide plate is fixed on the end of the piston rod of the heat sealing cylinder, and the slide plate A positioning rod is fixed on the top, and a heat sealing positioning block is arranged on the positioning rod. A positioning plate slidably connected to the positioning rod is also arranged on the positioning rod, a heating plate is fixed on the positioning plate, and a positioning spring is fixed between the positioning plate and the heat sealing positioning block. A limiting rod is also fixed on the slide plate, and a heat sealing limiting block is arranged on the limiting rod. A limiting plate slidably connected to the limiting rod is also arranged on the limiting rod, a cooling plate is fixed on the limiting plate, and a limiting spring is fixed between the limiting plate and the heat sealing limiting block. A plurality of positioning shafts are also fixed on the sliding table, and a positioning wheel is arranged on the positioning shaft. A high-temperature belt is also arranged on one side of the sliding table, and the high-temperature belt passes around each positioning wheel in turn and ends together. The film is moved by the traction mechanism. After the sheet film is produced, it passes between the heat sealing device and the supporting device. The piston rod of the heat sealing cylinder extends, the slide moves, the heating plate and the cooling plate are in contact with the high-temperature belt, and the high-temperature belt presses the film onto the supporting synchronous belt. When the film passes between the high-temperature belt and the supporting synchronous belt, the high-temperature belt is driven to rotate by the friction force between the film and the high-temperature belt, and the supporting synchronous belt is driven to rotate by the friction force between the film and the supporting synchronous belt. The heating tube in the heating plate generates heat after being energized, and the temperature of the heating plate increases. When the high-temperature belt passes between the heating plate and the film, the high-temperature belt is heated by the heating plate, and the temperature of the high-temperature belt increases. The high-temperature belt at the heating plate position contacts the film and passes through the high The temperature belt and the supporting synchronous belt will heat-join the film passing through the heating plate position. After the film is heat-joined, the film heat-joining position continues to move with the high-temperature belt, and the high-temperature belt contacts the cooling plate made of aluminum plate. The high-temperature belt and the film heat-joining position are cooled by the cooling plate. After the film heat-joining position and the high-temperature belt are cooled, they continue to move. The film heat-joining position solidifies after cooling. The solidified heat-joining position is separated from the cooled high-temperature belt. The heat-joining position reaches the blade position and is cut by the blade. When producing film, only one columnar film with a larger diameter needs to be produced at a time, and the large columnar film can be cut into multiple small columnar films by this device, so that multiple rolls of film can be produced at one time, which greatly improves the production efficiency of film rolls.

[0007] Preferably, a support base plate used in conjunction with a support synchronous belt is fixed on one side of the support plate close to the heat sealing device. The support synchronous belt passes between the support base plate and the film, and the support synchronous belt is supported by the support base plate.

[0008] Preferably, the support plate is also fixed with a plurality of support rods, a support positioning block is fixed on the support rod, a support limit block is arranged on one side of the support positioning block, the support rod passes through the support limit block and is slidably connected with the support limit block, a plurality of support springs are also fixed between the support limit block and the support positioning block, a support elastic shaft is also fixed on the support limit block, a support elastic wheel is arranged on the support elastic shaft, and the support synchronous belt passes around the support elastic wheel. The support synchronous belt is tightened by pushing the support elastic wheel through the support spring.

[0009] Preferably, a support cylinder is fixed on the support plate, a support slider is fixed at the end of the piston rod of the support cylinder, a support pressure shaft is fixed on the support slider, a support pressure wheel is arranged on the support pressure shaft, and the support synchronous belt passes around the support pressure wheel. When the film is cut, the piston rod of the support cylinder is in an extended state, and the support synchronous belt is further tightened by the support pressure wheel.

[0010] Preferably, the frame is also provided with two screws used in conjunction with the slitting mechanism, one of which passes through the support plate and is threadedly connected to the support plate, and the other passes through the slide and is threadedly connected to the slide, and sprockets are fixed to the two screws, and the two sprockets are connected by a chain, and a handle is also fixed to one of the screws. The screws are rotated by the handle to achieve synchronous rotation of the two screws, thereby adjusting the position of the support plate and the slide on the slide, thereby adjusting the hot connection and slitting position of the film, and slitting a large film into different widths to meet the production needs of film rolls of different widths.

[0011] Preferably, a limit cylinder is fixed on the slide, a fixed block is fixed to the end of the piston rod of the limit cylinder, a heat sealing rod is fixed to the fixed block, a heat sealing wheel is arranged on the heat sealing rod, and the high temperature belt passes around the heat sealing wheel. When the limit cylinder is started, the piston rod on the limit cylinder is extended, and the high temperature belt is tightened through the heat sealing wheel.

[0012] Preferably, the slide is also fixed with a plurality of connecting rods, a connecting plate is also fixed on the connecting rods, a connecting block is provided on one side of the connecting plate, the connecting rod passes through the connecting block and is slidably connected with the connecting block, a plurality of connecting springs are also fixed between the connecting block and the connecting plate, a connecting shaft is also fixed on the connecting block, a connecting wheel is provided on the connecting shaft, and the high-temperature belt passes around the connecting wheel. The connecting spring pushes the connecting wheel to tighten the high-temperature belt.

[0013] Preferably, the blade is fixed on a fixed block. When the position of the slitting mechanism is adjusted, the piston rod of the limit cylinder is shortened, and the blade is separated from the film.

[0014] Compared with the prior art, the present invention has the following advantages:

[0015] During film production, only one cylindrical film with a larger diameter needs to be produced at a time, and the large cylindrical film is cut into multiple small cylindrical films by the device, so that multiple rolls of film can be produced at one time, which greatly improves the production efficiency of the film rolls. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] The specific embodiments of the present invention are further described in detail below with reference to the accompanying drawings, wherein:

[0017] Figure 1 It is a schematic diagram of the structure of the present invention when the film is cut;

[0018] Figure 2 It is a structural schematic diagram of the present invention;

[0019] Figure 3 It is another structural schematic diagram of the present invention from another angle;

[0020] Figure 4 It is a schematic diagram of the supporting device structure;

[0021] Figure 5 It is a structural schematic diagram of another angle of the supporting device;

[0022] Figure 6 It is a schematic diagram of the heat sealing device structure;

[0023] Figure 7 It is a schematic structural diagram of the heat sealing device from another angle;

[0024] In the figure: 1, frame; 2, slide bar; 3, film; 4, screw; 5, sprocket; 6, handle; 7, heat sealing device; 701, slide; 702, fixed rod; 703, slide plate; 704, heat sealing cylinder; 705, positioning shaft; 706, positioning wheel; 707, high temperature belt; 708, positioning rod; 709, heat sealing positioning block; 710, positioning plate; 711, positioning spring; 712, heating plate; 713, limiting rod; 714, heat sealing limiting block; 715, limiting plate; 716, limiting spring; 717, cooling plate; 718, limiting cylinder; 719, fixed block; 720, heat sealing pressure rod ;721, heat sealing pressure wheel;722, connecting rod;723, connecting plate;724, connecting block;725, connecting shaft;726, connecting wheel;727, connecting spring;8, supporting device;801, supporting plate;802, supporting cylinder;803, supporting slider;804, supporting pressure shaft;805, supporting pressure wheel;806, supporting shaft;807, supporting wheel;808, supporting synchronous belt;809, supporting bottom plate;810, supporting rod;811, supporting positioning block;812, supporting limiting block;813, supporting elastic shaft;814, supporting elastic wheel;815, supporting spring;9, blade; DETAILED DESCRIPTION

[0025] The embodiments of the present invention are described in detail below with reference to the accompanying drawings:

[0026] Embodiment 1:

[0027] like Figures 1 to 7As shown, the present embodiment discloses a plastic film slitting device, comprising a frame 1, on which a plurality of slide bars 2 are fixed, on which a plurality of slitting mechanisms are arranged, the slitting mechanisms comprising a heat sealing device 7 arranged on the slide bar 2, a supporting device 8 is further arranged on one side of the heat sealing device 7, a blade 9 is fixed on one side of the heat sealing device 7, the supporting device 8 comprises a supporting plate 801, on which a plurality of supporting shafts 806 are fixed, on which a supporting wheel 807 is arranged, a supporting synchronous belt 808 is further arranged on one side of the support plate 801, the supporting synchronous belt 808 passes around each supporting wheel 807 in turn and then ends and connects, the heat sealing device 7 comprises a slide table 701, on which a heat sealing cylinder 704 is fixed, a slide plate 703 is fixed at the end of the piston rod of the heat sealing cylinder 704, a positioning rod 708 is fixed on the slide plate 703, and a positioning rod 708 is A heat sealing positioning block 709 is provided, and a positioning plate 710 slidably connected to the positioning rod 708 is also provided on the positioning rod 708, a heating plate 712 is fixed on the positioning plate 710, and a positioning spring 711 is fixed between the positioning plate 710 and the heat sealing positioning block 709, a limiting rod 713 is also fixed on the slide plate 703, a heat sealing limiting block 714 is provided on the limiting rod 713, a limiting plate 715 slidably connected to the limiting rod 713 is also provided on the limiting rod 713, a cooling plate 717 is fixed on the limiting plate 715, and a limiting spring 716 is fixed between the limiting plate 715 and the heat sealing limiting block 714, a plurality of positioning shafts 705 are also fixed on the slide 701, and a positioning wheel 706 is provided on the positioning shaft 705, and a high-temperature belt 707 is also provided on one side of the slide 701, and the high-temperature belt 707 passes around each positioning wheel 706 in turn and ends and connects.The film 3 is pulled and moved by the traction mechanism. After the sheet film 3 is produced, it passes between the heat sealing device 7 and the supporting device 8. The piston rod of the heat sealing cylinder 704 is extended, the slide plate 703 moves, the heating plate 712 and the cooling plate 717 are in contact with the high-temperature belt 707, and the high-temperature belt 707 presses the film 3 on the supporting synchronous belt 808. When the film 3 passes between the high-temperature belt 707 and the supporting synchronous belt 808, the high-temperature belt 707 is driven to rotate by the friction force between the film 3 and the high-temperature belt 707, and the supporting synchronous belt 808 is driven to rotate by the friction force between the film 3 and the supporting synchronous belt 808. The heating tube in the heating plate 712 is energized and generates heat, and the temperature of the heating plate 712 increases. When the high-temperature belt 707 passes between the heating plate 712 and the film 3, the high-temperature belt 707 is heated by the heating plate 712, and the temperature of the high-temperature belt 707 increases. The position of the heating plate 712 The high-temperature belt 707 is in contact with the film 3, and the film 3 passing through the position of the heating plate 712 is heat-joined through the action of the high-temperature belt 707 and the supporting synchronous belt 808. After the film 3 is heat-joined, the heat-joined position of the film 3 continues to move with the high-temperature belt 707, and the high-temperature belt 707 is in contact with the cooling plate 717 made of aluminum plate, and the high-temperature belt 707 and the heat-joined position of the film 3 are cooled by the cooling plate 717. After the heat-joined position of the film 3 and the high-temperature belt 707 are cooled, they continue to move, and the heat-joined position of the film 3 solidifies after cooling. The solidified heat-joined position is separated from the high-temperature belt 707 after cooling, and the heat-joined position reaches the position of the blade 9, and the heat-joined position is cut by the blade 9. When the film 3 is produced, only one columnar film 3 with a larger diameter needs to be produced at a time, and the large columnar film 3 is cut into multiple small columnar films 3 by this device, so that multiple rolls of film 3 can be produced at one time, which greatly improves the production efficiency of the film roll.

[0028] Among them, a support bottom plate 809 used in conjunction with the support synchronous belt 808 is fixed on one side of the support plate 801 close to the heat sealing device 7. The support synchronous belt 808 passes between the support bottom plate 809 and the film 3, and the support synchronous belt 808 is supported by the support bottom plate 809.

[0029] A plurality of fixing rods 702 are fixed on the slide 701 , and the fixing rods 702 pass through the slide 703 and are slidably connected to the slide 703 .

[0030] Among them, the frame 1 is also provided with two screws 4 used in conjunction with the slitting mechanism, one of which passes through the corresponding support plate 801 and is threadedly connected to the support plate 801, and the other screw 4 passes through the corresponding slide 701 and is threadedly connected to the slide 701, and sprockets 5 are fixed on both screws 4, and the two sprockets 5 are connected by a chain, and a handle 6 is also fixed on one of the screws 4. The screws 4 are rotated by the handle 6 to achieve synchronous rotation of the two screws 4, thereby adjusting the positions of the support plate 801 and the slide 701 on the slide 2, thereby adjusting the heat connection and slitting positions of the film 3, and slitting the large film 3 into different widths to meet the production needs of film rolls of different widths.

[0031] Among them, a limit cylinder 718 is also fixed on the slide 701, and a fixing block 719 is fixed to the end of the piston rod of the limit cylinder 718, and a heat sealing pressure rod 720 is fixed to the fixing block 719. A heat sealing pressure wheel 721 is arranged on the heat sealing pressure rod 720, and the high temperature belt 707 passes around the heat sealing pressure wheel 721. When the limit cylinder 718 is started, the piston rod on the limit cylinder 718 is extended, and the high temperature belt 707 is tightened through the heat sealing pressure wheel 721.

[0032] The blade 9 is fixed on the fixed block 719. When the position of the slitting mechanism is adjusted, the piston rod of the limit cylinder 718 is shortened, and the blade 9 is separated from the film 3.

[0033] Embodiment 2:

[0034] This embodiment discloses a plastic film slitting device. Based on the structure and principle of the first embodiment, a support cylinder 802 is further fixed on the support plate 801 of this embodiment, a support slider 803 is fixed to the end of the piston rod of the support cylinder 802, a support pressing shaft 804 is fixed to the support slider 803, a support pressing wheel 805 is arranged on the support pressing shaft 804, and a support synchronous belt 808 passes around the support pressing wheel 805. When the film 3 is slid, the piston rod of the support cylinder 802 is in an extended state, and the support synchronous belt 808 is further tightened by the support pressing wheel 805.

[0035] Embodiment 3:

[0036] This embodiment discloses a plastic film slitting device. Based on the structure and principle of the first or second embodiment, a plurality of connecting rods 722 are fixed on the slide 701 of this embodiment, a connecting plate 723 is fixed on the connecting rod 722, a connecting block 724 is arranged on one side of the connecting plate 723, the connecting rod 722 passes through the connecting block 724 and is slidably connected with the connecting block 724, a plurality of connecting springs 727 are fixed between the connecting block 724 and the connecting plate 723, a connecting shaft 725 is fixed on the connecting block 724, a connecting wheel 726 is arranged on the connecting shaft 725, and the high temperature belt 707 passes around the connecting wheel 726. The connecting spring 727 pushes the connecting wheel 726 to tighten the high temperature belt 707.

[0037] Embodiment 4:

[0038] This embodiment discloses a plastic film slitting device. Based on the structure and principle of any one of the embodiments 1 to 3, a plurality of support rods 810 are fixed on the support plate 801 of this embodiment. A support positioning block 811 is fixed on the support rod 810. A support limit block 812 is arranged on one side of the support positioning block 811. The support rod 810 passes through the support limit block 812 and is slidably connected with the support limit block 812. A plurality of support springs 815 are fixed between the support limit block 812 and the support positioning block 811. A support elastic shaft 813 is fixed on the support limit block 812. A support elastic wheel 814 is arranged on the support elastic shaft 813. The support synchronous belt 808 passes around the support elastic wheel 814. The support synchronous belt 808 is tightened by pushing the support elastic wheel 814 through the support spring 815.

[0039] The above are only preferred embodiments of the present invention. It should be pointed out that for ordinary technicians in this technical field, various changes, modifications, substitutions and variations can be made to these embodiments without departing from the technical principles of the present invention. These changes, modifications, substitutions and variations should also be regarded as the scope of protection of the present invention.

Claims

1. A plastic film slitting device, comprising a frame, characterized in that: A plurality of slide bars are fixed on the frame, a plurality of slitting mechanisms are arranged on the slide bars, the slitting mechanisms include a heat sealing device arranged on the slide bars, a supporting device is also arranged on one side of the heat sealing device, a blade is fixed on one side of each heat sealing device, the supporting device includes a supporting plate, a plurality of supporting shafts are fixed on the supporting plate, supporting wheels are arranged on each supporting shaft, a supporting synchronous belt is also arranged on one side of the supporting plate, the supporting synchronous belt passes through each supporting wheel in turn and then ends and connects, the heat sealing device includes a sliding table, a heat sealing cylinder is fixed on the sliding table, a slide plate is fixed on the end of the piston rod of the heat sealing cylinder, a positioning rod is fixed on the slide plate, and the positioning A heat sealing positioning block is provided on the positioning rod, and a positioning plate slidably connected to the positioning rod is also provided on the positioning rod, a heating plate is fixed on the positioning plate, a positioning spring is fixed between the positioning plate and the heat sealing positioning block, a limiting rod is fixed on the slide plate, a heat sealing limiting block is provided on the limiting rod, a limiting plate slidably connected to the limiting rod is provided on the limiting rod, a cooling plate is fixed on the limiting plate, and a limiting spring is fixed between the limiting plate and the heat sealing limiting block, a plurality of positioning shafts are fixed on the sliding table, a positioning wheel is provided on the positioning shaft, and a high-temperature belt is provided on one side of the sliding table, and the high-temperature belt passes around each positioning wheel in turn and ends together.

2. The plastic film slitting device according to claim 1, characterized in that: A supporting bottom plate used in conjunction with the supporting synchronous belt is fixed on one side of the supporting plate close to the heat sealing device.

3. The plastic film slitting device according to claim 1, characterized in that: A plurality of support rods are also fixed on the support plate, a support positioning block is fixed on the support rod, a support limit block is arranged on one side of the support positioning block, the support rod passes through the support limit block and is slidably connected to the support limit block, a plurality of support springs are also fixed between the support limit block and the support positioning block, a support elastic shaft is also fixed on the support limit block, a support elastic shaft is arranged on the support elastic wheel, and the support synchronous belt passes around the support elastic wheel.

4. The plastic film slitting device according to claim 1, characterized in that: A supporting cylinder is also fixed on the supporting plate, a supporting slider is fixed to the end of the piston rod of the supporting cylinder, a supporting pressure shaft is fixed on the supporting slider, a supporting pressure wheel is arranged on the supporting pressure shaft, and the supporting synchronous belt passes around the supporting pressure wheel.

5. The plastic film slitting device according to claim 1, characterized in that: The frame is also provided with two screw rods used in conjunction with the slitting mechanism, one of which passes through the support plate and is threadedly connected to the support plate, and the other screw passes through the slide and is threadedly connected to the slide. Sprockets are fixed on the two screw rods, and the two sprockets are connected by chains. A handle is also fixed on one of the screw rods.

6. The plastic film slitting device according to claim 1, characterized in that: A limiting cylinder is also fixed on the slide, a fixing block is fixed to the end of the piston rod of the limiting cylinder, a heat sealing pressure rod is fixed on the fixing block, a heat sealing pressure wheel is arranged on the heat sealing pressure rod, and the high temperature belt passes around the heat sealing pressure wheel.

7. The plastic film slitting device according to claim 1, characterized in that: A plurality of connecting rods are fixed on the slide, a connecting plate is fixed on the connecting rods, a connecting block is arranged on one side of the connecting plate, the connecting rods pass through the connecting block and are slidably connected with the connecting block, a plurality of connecting springs are fixed between the connecting block and the connecting plate, a connecting shaft is fixed on the connecting block, a connecting wheel is arranged on the connecting shaft, and the high-temperature belt passes around the connecting wheel.

8. The plastic film slitting device according to claim 6, characterized in that: The blade is fixed on the fixing block.

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