CN109014607B - Production method of polyethylene plastic film - Google Patents
Production method of polyethylene plastic film Download PDFInfo
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- CN109014607B CN109014607B CN201810954731.8A CN201810954731A CN109014607B CN 109014607 B CN109014607 B CN 109014607B CN 201810954731 A CN201810954731 A CN 201810954731A CN 109014607 B CN109014607 B CN 109014607B
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- polyethylene plastic
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- polyethylene
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- 239000002985 plastic film Substances 0.000 title claims abstract description 116
- 229920006255 plastic film Polymers 0.000 title claims abstract description 116
- -1 polyethylene Polymers 0.000 title claims abstract description 108
- 239000004698 Polyethylene Substances 0.000 title claims abstract description 104
- 229920000573 polyethylene Polymers 0.000 title claims abstract description 104
- 238000004519 manufacturing process Methods 0.000 title claims abstract description 29
- 238000005520 cutting process Methods 0.000 claims abstract description 68
- 239000002994 raw material Substances 0.000 claims abstract description 31
- 238000005096 rolling process Methods 0.000 claims abstract description 10
- 238000002844 melting Methods 0.000 claims abstract description 8
- 230000008018 melting Effects 0.000 claims abstract description 8
- 238000003756 stirring Methods 0.000 claims abstract description 8
- 238000004806 packaging method and process Methods 0.000 claims abstract description 5
- 239000002245 particle Substances 0.000 claims abstract description 5
- 238000001125 extrusion Methods 0.000 claims abstract description 4
- 239000000835 fiber Substances 0.000 claims abstract description 4
- 239000007788 liquid Substances 0.000 claims abstract description 4
- 238000002156 mixing Methods 0.000 claims abstract description 4
- 238000000465 moulding Methods 0.000 claims abstract description 4
- 229920000139 polyethylene terephthalate Polymers 0.000 claims abstract description 4
- 239000005020 polyethylene terephthalate Substances 0.000 claims abstract description 4
- 238000003825 pressing Methods 0.000 claims abstract description 4
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims description 35
- 238000004804 winding Methods 0.000 claims description 24
- 238000003860 storage Methods 0.000 claims description 22
- 230000005540 biological transmission Effects 0.000 claims description 17
- 239000000498 cooling water Substances 0.000 claims description 15
- 238000000034 method Methods 0.000 claims description 12
- 239000000956 alloy Substances 0.000 claims description 6
- 238000004663 powder metallurgy Methods 0.000 claims description 6
- 238000001816 cooling Methods 0.000 claims description 5
- 238000009434 installation Methods 0.000 claims description 4
- 229910045601 alloy Inorganic materials 0.000 claims description 3
- 238000003698 laser cutting Methods 0.000 claims description 2
- 229920003023 plastic Polymers 0.000 description 6
- 239000004033 plastic Substances 0.000 description 6
- 230000009286 beneficial effect Effects 0.000 description 4
- 230000000694 effects Effects 0.000 description 4
- 238000000926 separation method Methods 0.000 description 4
- 235000013305 food Nutrition 0.000 description 3
- 239000000463 material Substances 0.000 description 3
- 238000010521 absorption reaction Methods 0.000 description 2
- 238000009834 vaporization Methods 0.000 description 2
- 230000008016 vaporization Effects 0.000 description 2
- 235000013361 beverage Nutrition 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 239000003814 drug Substances 0.000 description 1
- 235000013410 fast food Nutrition 0.000 description 1
- 230000002349 favourable effect Effects 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 230000002035 prolonged effect Effects 0.000 description 1
- 239000000126 substance Substances 0.000 description 1
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Classifications
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B65—CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
- B65H—HANDLING THIN OR FILAMENTARY MATERIAL, e.g. SHEETS, WEBS, CABLES
- B65H18/00—Winding webs
- B65H18/08—Web-winding mechanisms
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
- B23K—SOLDERING OR UNSOLDERING; WELDING; CLADDING OR PLATING BY SOLDERING OR WELDING; CUTTING BY APPLYING HEAT LOCALLY, e.g. FLAME CUTTING; WORKING BY LASER BEAM
- B23K26/00—Working by laser beam, e.g. welding, cutting or boring
- B23K26/36—Removing material
- B23K26/38—Removing material by boring or cutting
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
- B23K—SOLDERING OR UNSOLDERING; WELDING; CLADDING OR PLATING BY SOLDERING OR WELDING; CUTTING BY APPLYING HEAT LOCALLY, e.g. FLAME CUTTING; WORKING BY LASER BEAM
- B23K26/00—Working by laser beam, e.g. welding, cutting or boring
- B23K26/36—Removing material
- B23K26/40—Removing material taking account of the properties of the material involved
- B23K26/402—Removing material taking account of the properties of the material involved involving non-metallic material, e.g. isolators
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
- B29D—PRODUCING PARTICULAR ARTICLES FROM PLASTICS OR FROM SUBSTANCES IN A PLASTIC STATE
- B29D7/00—Producing flat articles, e.g. films or sheets
- B29D7/01—Films or sheets
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B65—CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
- B65H—HANDLING THIN OR FILAMENTARY MATERIAL, e.g. SHEETS, WEBS, CABLES
- B65H23/00—Registering, tensioning, smoothing or guiding webs
- B65H23/04—Registering, tensioning, smoothing or guiding webs longitudinally
- B65H23/26—Registering, tensioning, smoothing or guiding webs longitudinally by transverse stationary or adjustable bars or rollers
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B65—CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
- B65H—HANDLING THIN OR FILAMENTARY MATERIAL, e.g. SHEETS, WEBS, CABLES
- B65H35/00—Delivering articles from cutting or line-perforating machines; Article or web delivery apparatus incorporating cutting or line-perforating devices, e.g. adhesive tape dispensers
- B65H35/02—Delivering articles from cutting or line-perforating machines; Article or web delivery apparatus incorporating cutting or line-perforating devices, e.g. adhesive tape dispensers from or with longitudinal slitters or perforators
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B65—CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
- B65H—HANDLING THIN OR FILAMENTARY MATERIAL, e.g. SHEETS, WEBS, CABLES
- B65H2701/00—Handled material; Storage means
- B65H2701/10—Handled articles or webs
- B65H2701/19—Specific article or web
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- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Physics & Mathematics (AREA)
- Optics & Photonics (AREA)
- Plasma & Fusion (AREA)
- Processing And Handling Of Plastics And Other Materials For Molding In General (AREA)
Abstract
The invention belongs to the technical field of plastic film production, and particularly relates to a production method of a polyethylene plastic film, which comprises the following steps: putting polyethylene particles and polyethylene terephthalate fiber sheets into a mixer for mixing and stirring, wherein the stirring temperature is 70 ℃; putting the mixed raw materials into a melting stirrer, wherein the melting temperature is 250 ℃; extruding and paving the molten liquid by an extrusion roller, ventilating to reduce the surface temperature of the film product to 60 ℃, and then pressing and molding by a gap plate; the pressed and formed film is placed at room temperature to be cooled for 24 hours, and then the finished product is wound on a raw material roller; and cutting the polyethylene plastic film wound on the raw material roller by using a plastic film cutting device, cutting the polyethylene plastic film with a nonlinear edge, rolling and packaging. The invention realizes the production of the polyethylene plastic film with the nonlinear edge and improves the quality of the polyethylene plastic film.
Description
Technical Field
The invention belongs to the technical field of plastic film production, and particularly relates to a production method of a polyethylene plastic film.
Background
The production of polyethylene plastic film is that after the polyethylene plastic particles are extruded and plasticized, the film is formed in a special mould, and then the film is coiled after being shaped. And then cutting the wound film to a required size by using a splitting machine, rewinding the cut film, and finally packaging for use. Plastic packages and plastic package products have a growing share in the market, and particularly, flexible polyethylene plastic film packages are widely applied to the fields of food, medicine, chemical industry and the like, wherein the proportion of the plastic packages is the largest, such as beverage packages, quick-frozen food packages, steamed and cooked food packages, fast food packages and the like, and the plastic packages and the plastic package products bring great convenience to the life of people. In the actual cutting process of the plastic film, when a special cutting edge shape needs to be cut, the existing device is difficult to meet, the production process of the polyethylene plastic film is complex, and the production efficiency is low.
Disclosure of Invention
In order to make up for the defects of the prior art, the invention provides a production method of a polyethylene plastic film, and mainly provides a production method of a polyethylene plastic film capable of realizing nonlinear edges. According to the method, the plastic film is pressed and molded, then the plastic film cutting device is adopted, the laser is used for cutting the film, the laser moves on the sliding rail, and the precise movement of the laser is realized through the gapless meshing transmission of the gear and the sliding rail, so that the production of the polyethylene plastic film with the nonlinear edge is realized, and the quality of the polyethylene plastic film is improved.
The technical scheme adopted by the invention for solving the technical problems is as follows: the invention relates to a method for producing a polyethylene plastic film, which comprises the following steps:
the method comprises the following steps: putting polyethylene particles and polyethylene terephthalate fiber sheets into a mixer for mixing and stirring, wherein the stirring temperature is 70 ℃;
step two: putting the mixed raw materials in the first step into a melting stirrer, wherein the melting temperature is 250 ℃;
step three: extruding and paving the molten liquid melted in the step two through an extrusion roller, ventilating to reduce the surface temperature of the film product to 60 ℃, and then pressing and molding through a gap plate;
step four: the film pressed and formed in the third step is placed at room temperature for cooling for 24 hours, and then the finished product is wound on a raw material roller;
step five: cutting the polyethylene plastic film wound on the raw material roller in the fourth step by using a plastic film cutting device, cutting the polyethylene plastic film with a nonlinear edge, rolling and packaging;
the plastic film slitting device in the fifth step comprises a raw material roller, a transmission roller, a separating rod, a winding roller, a cutting device and a rack, wherein the raw material roller is positioned at the foremost end of the rack; the driving roller is positioned on the right side of the raw material roller; the cutting device is positioned at the upper left part of the separating rod, the number of the cutting devices is at least two, and the cutting device can cut the polyethylene plastic film into a plurality of pieces; the separating rod is positioned on the right side of the transmission roller and is used for separating the cut polyethylene plastic film, so that the subsequent rolling is facilitated; the winding roller is positioned on the right side of the separating rod and used for separately winding the cut polyethylene plastic film to realize collection; the cross section of the frame is U-shaped, the raw material roller, the transmission roller and the winding roller are rotationally connected with the frame, and motors are arranged on one sides of the transmission roller and the winding roller; wherein,
the cutting device comprises two sliding rails, a mounting rack, a gear and a laser, the two sliding rails are horizontally mounted on the rack, the two sliding rails are parallel to each other, and a tooth-shaped structure is arranged on the upper surfaces of the sliding rails; the number of the mounting racks is at least two, the mounting racks are placed on the upper surfaces of the slide rails, the mounting racks are of rectangular frame structures, flanges are arranged at the bottoms of the mounting racks on the left side and the right side of the slide rails and used for limiting the mounting racks on the slide rails, and cross beams are arranged at the tops of the mounting racks; the number of the gears is two, the gears are arranged in the mounting rack, the two gears are respectively rotatably mounted on the left side and the right side of the mounting rack through cantilever shafts, turntables are respectively arranged at one ends of the two cantilever shafts far away from the rack, the two turntables are connected through a connecting shaft, the axis of the connecting shaft deviates from the axis of the cantilever shafts, the two gears are respectively positioned above the two slide rails, and gapless meshing is realized between the gears and the tooth-shaped structures of the slide rails; the laser is fixed on the cross beam of the mounting frame, positioned between the two gears and used for cutting the polyethylene plastic film in a laser mode, and penetrates through a connecting line between the centers of the two gears; the rack is provided with a cylinder, the side face of the mounting rack is provided with a fixing seat, a piston rod of the cylinder is connected with the fixing seat of the mounting rack, and the cylinder is used for pushing the mounting rack to move along the sliding rail. One end of a polyethylene plastic film wound on a raw material roller passes through a transmission roller, a cutting device and a separating rod and then is wound on a winding roller, a motor drives the winding roller to rotate to pull the polyethylene plastic film on the raw material roller to move, when the polyethylene plastic film passes through the lower part of a laser, the laser cuts the polyethylene plastic film, and when the polyethylene plastic film is cut, an air cylinder pushes an installation frame to move back and forth along a sliding rail so as to drive the laser to reciprocate, so that the edge of the polyethylene plastic film cut by the laser presents a wave shape, the cutting of the polyethylene plastic film in any shape can be realized, the application range of the cutting of the polyethylene plastic film is widened, in the process that the installation frame moves back and forth along the sliding rail, a gear moves on the sliding rail and rotates, a connecting shaft and a turntable synchronously rotate along with the gear, and the connecting shaft is eccentrically arranged, the connecting shaft always periodically moves to the position right below the laser at the moment when the cylinder changes the movement direction, and laser emitted by the laser is shielded, so that the situation that the turning point position of the edge of the polyethylene plastic film is over-burnt and poor slitting occurs due to relatively long time consumption when the cylinder changes the movement direction is avoided, and the slitting quality is further ensured.
The gear is made of a powder metallurgy high-temperature alloy material, and a powder metallurgy high-temperature alloy layer is also arranged on the surface of the tooth-shaped structure of the sliding rail. The gear and the slide rail made of high-temperature resistant materials can prevent deformation from generating and influence transmission precision, so that the edge shape of the cut polyethylene plastic film deviates from the expectation, and the cutting effect is ensured.
The rotary table is of a built-in cavity structure, the connecting shaft is a hollow shaft, the interior of the rotary table is communicated with the connecting shaft to form a water storage cavity, and cooling water is stored in the water storage cavity; the cantilever shaft is provided with a vent hole along the axis direction, the vent hole of the cantilever shaft is communicated with the water storage cavity, one end of one cantilever shaft, which is positioned outside the mounting frame, is connected with the air cylinder through a hose and an electromagnetic valve, the other end of the other cantilever shaft, which is positioned outside the mounting frame, is connected with the water tank through a hose and a one-way valve, the water tank is used for supplying cooling water into the water storage cavity, and the water tank is communicated with the exhaust hole of the electromagnetic valve through a hose. The cooling water in connecting axle and the carousel can carry out local cooling to the laser instrument, avoid near laser instrument temperature rise too high, improve the life of laser instrument, the cooling water heat absorption vaporization back of water storage intracavity, steam passes through hose and solenoid valve messenger cylinder back and forth movement, the make full use of the energy has been realized, preheat the cooling water in the water tank through the hot-air of cylinder exhaust, and get back to the water storage intracavity once more and realize the circulation, the volume of steam production in the water storage intracavity has been guaranteed, thereby guarantee that the power of cylinder is sufficient, realize cutting device's normal work.
The machine frame is provided with the spout in the position level of separator bar, and the separator bar both ends are located the spout of frame, and horizontal installation has electric putter in the frame, and electric putter passes the spout of frame and is connected with the separator bar, and the separator bar upper surface is provided with dials the needle. When polyethylene plastic film after cutting device cuts passes the release lever, electric putter drives the release lever along the spout round trip movement of frame, makes to dial the needle and remove along polyethylene plastic film's edge all the time to two piece adjacent polyethylene plastic film after will cutting separate better, the subsequent rolling of being convenient for.
The poking needle is conical, and the maximum thickness of the poking needle is smaller than 1 mm. On one hand, the fine shifting needle is beneficial to realizing the separation of two adjacent polyethylene plastic films, and meanwhile, the polyethylene plastic films cannot be damaged, so that the quality of the polyethylene plastic films after being cut is ensured.
The invention has the following beneficial effects:
1. according to the production method of the polyethylene plastic film, the plastic film is pressed and formed, the plastic film cutting device is adopted, the film is cut by the laser, the laser moves on the sliding rail, and the laser moves accurately through the gapless meshing transmission of the gear and the sliding rail, so that the production of the polyethylene plastic film with the nonlinear edge is realized, and the quality of the polyethylene plastic film is improved.
2. According to the production method of the polyethylene plastic film, the poking needle is arranged on the separating rod and moves along the edge of the polyethylene plastic film under the driving of the electric push rod, so that the separation of two adjacent polyethylene plastic films is realized, the polyethylene plastic film cannot be damaged, and the product quality is ensured.
3. According to the production method of the polyethylene plastic film, the laser is periodically shielded through the eccentric design of the connecting shaft, so that the phenomenon that the plastic film is locally over-burnt to influence the cutting quality due to overlong residence time of the laser at the inflection point position of the change of the moving direction is avoided, and the quality of the polyethylene plastic film after cutting is improved.
Drawings
FIG. 1 is a flow chart of a method of the present invention;
FIG. 2 is a front view of the plastic film slitting device of the present invention;
FIG. 3 is a schematic view of the cutting apparatus of the present invention;
FIG. 4 is a partial cross-sectional view of the cutting device of the present invention;
in the figure: the device comprises a raw material roller 1, a driving roller 2, a separating rod 3, a winding roller 4, a cutting device 5, a rack 6, a motor 7, a sliding rail 51, a mounting rack 52, a gear 53, a laser 54, a turntable 55, a connecting shaft 56, a cross beam 521, a cylinder 9, a water storage cavity 57, a water tank 10, an electric push rod 8, a shifting needle 31 and a one-way valve 11.
Detailed Description
A method for producing a polyethylene plastic film according to an embodiment of the present invention will be described below with reference to fig. 1 to 4.
As shown in fig. 1 to 4, the method for producing a polyethylene plastic film according to the present invention comprises the following steps:
the method comprises the following steps: putting polyethylene particles and polyethylene terephthalate fiber sheets into a mixer for mixing and stirring, wherein the stirring temperature is 70 ℃;
step two: putting the mixed raw materials in the first step into a melting stirrer, wherein the melting temperature is 250 ℃;
step three: extruding and paving the molten liquid melted in the step two through an extrusion roller, ventilating to reduce the surface temperature of the film product to 60 ℃, and then pressing and molding through a gap plate;
step four: the film pressed and formed in the third step is placed at room temperature for cooling for 24 hours, and then the finished product is wound on a raw material roller;
step five: cutting the polyethylene plastic film wound on the raw material roller in the fourth step by using a plastic film cutting device, cutting the polyethylene plastic film with a nonlinear edge, rolling and packaging;
the plastic film slitting device in the fifth step comprises a raw material roller 1, a transmission roller 2, a separating rod 3, a winding roller 4, a cutting device 5 and a rack 6, wherein the raw material roller 1 is positioned at the foremost end of the rack 6; the driving roller 2 is positioned on the right side of the raw material roller 1; the cutting device 5 is positioned at the upper left of the separating rod 3, the number of the cutting devices 5 is at least two, and the cutting device 5 can cut the polyethylene plastic film into a plurality of pieces; the separating rod 3 is positioned on the right side of the driving roller 2, and the separating rod 3 is used for separating the cut polyethylene plastic film, so that the subsequent rolling is facilitated; the winding roller 4 is positioned on the right side of the separating rod 3, and the winding roller 4 is used for separately winding the cut polyethylene plastic film to realize collection; the section of the frame 6 is U-shaped, the raw material roller 1, the driving roller 2 and the winding roller 4 are rotationally connected with the frame 6, and one sides of the driving roller 2 and the winding roller 4 are provided with motors 7; wherein,
the cutting device 5 comprises two sliding rails 51, a mounting frame 52, a gear 53 and a laser 54, the number of the sliding rails 51 is two, the sliding rails 51 are horizontally mounted on the rack 6, the two sliding rails 51 are parallel to each other, and the upper surfaces of the sliding rails 51 are provided with tooth-shaped structures; the number of the mounting racks 52 is at least two, the mounting racks 52 are placed on the upper surfaces of the slide rails 51, the mounting racks 52 are of rectangular frame structures, flanges are arranged at the bottoms of the mounting racks 52 on the left side and the right side of the slide rails 51 and used for limiting the mounting racks 52 on the slide rails 51, and cross beams 521 are arranged at the tops of the mounting racks 52; the number of the gears 53 is two, the gears 53 are arranged in the mounting frame 52, the two gears 53 are respectively rotatably mounted on the left side and the right side of the mounting frame 52 through cantilever shafts, the two cantilever shafts are respectively provided with a rotating disc 55 at one end far away from the rack 6, the two rotating discs 55 are connected through a connecting shaft 56, the axis of the connecting shaft 56 deviates from the axis of the cantilever shafts, the two gears 53 are respectively positioned above the two slide rails 51, and gapless meshing is realized between the gears 53 and the tooth-shaped structures of the slide rails 51; the laser 54 is fixed on the cross beam 521 of the mounting frame 52, the laser 54 is positioned between the two gears 53, the laser 54 passes through a connecting line of the centers of the two gears 53, and the laser 54 is used for carrying out laser cutting on the polyethylene plastic film; the frame 6 is provided with a cylinder 9, the side surface of the mounting frame 52 is provided with a fixed seat, a piston rod of the cylinder 9 is connected with the fixed seat of the mounting frame 52, and the cylinder 9 is used for pushing the mounting frame 52 to move along the slide rail 51. One end of a polyethylene plastic film wound on a raw material roller 1 passes through a transmission roller 2, a cutting device 5 and a separating rod 3 and then is wound on a winding roller 4, a motor 7 drives the winding roller 4 to rotate, the polyethylene plastic film on the raw material roller 1 is pulled to move, when the polyethylene plastic film passes below a laser 54, the laser 54 cuts the polyethylene plastic film, and while cutting, an air cylinder 9 pushes a mounting rack 52 to move back and forth along a sliding rail 51 so as to drive the laser 54 to reciprocate, so that the edge of the polyethylene plastic film cut by the laser 54 presents a wave shape, the cutting of any shape of the polyethylene plastic film can be realized, the application range of the polyethylene plastic film cutting is widened, in the process that the mounting rack 52 moves back and forth along the sliding rail 51, a gear 53 moves on the sliding rail 51 and rotates, and a connecting shaft 56 and a turntable 55 synchronously rotate along with the gear 53, because the connecting shaft 56 is arranged eccentrically, the connecting shaft 56 always periodically moves to the position right below the laser 54 at the moment when the cylinder 9 changes the moving direction, and shields the laser emitted by the laser 54, thereby avoiding the situation that the turning point position of the edge of the polyethylene plastic film is over-burnt and the slitting is poor due to relatively long time consumption when the cylinder 9 changes the moving direction, and further ensuring the slitting quality.
The gear 53 is made of a powder metallurgy high-temperature alloy material, and a powder metallurgy high-temperature alloy layer is also arranged on the surface of the tooth-shaped structure of the slide rail 51. The gear 53 and the slide rail 51 made of high-temperature resistant materials can prevent deformation from generating and influence transmission precision, so that the edge shape of the cut polyethylene plastic film deviates from the expectation, and the cutting effect is ensured.
As shown in fig. 4, the turntable 55 is of a built-in cavity structure, the connecting shaft 56 is a hollow shaft, the turntable 55 and the connecting shaft 56 are communicated with each other to form a water storage cavity 57, and cooling water is stored in the water storage cavity 57; the cantilever shafts are provided with vent holes along the axis direction, the vent holes of the cantilever shafts are communicated with the water storage cavity 57, one end of one cantilever shaft, which is positioned on the outer side of the mounting rack 52, is connected with the air cylinder 9 through a hose and an electromagnetic valve, the other end of the other cantilever shaft, which is positioned on the outer side of the mounting rack 52, is connected with the water tank 10 through a hose and a check valve 11, the water tank 10 is used for supplying cooling water into the water storage cavity 57, and the water tank 10 is communicated with the exhaust holes of the electromagnetic valve through a. The cooling water in the connecting shaft 56 and the turntable 55 can locally cool the laser 54, the over-high temperature rise near the laser 54 is avoided, the service life of the laser 54 is prolonged, after the cooling water in the water storage cavity 57 absorbs heat and is vaporized, steam enables the cylinder 9 to move back and forth through the hose and the electromagnetic valve, the full utilization of energy is realized, the cooling water in the water tank 10 is preheated through the hot air exhausted by the cylinder 9 and returns to the water storage cavity 57 again to realize circulation, the amount of the steam generated in the water storage cavity 57 is ensured, the sufficient power of the cylinder 9 is ensured, and the normal work of the cutting device 5 is realized.
As shown in fig. 2, a sliding groove is horizontally arranged at the position of the separating rod 3 of the frame 6, two ends of the separating rod 3 are located in the sliding groove of the frame 6, an electric push rod 8 is horizontally arranged on the frame 6, the electric push rod 8 penetrates through the sliding groove of the frame 6 to be connected with the separating rod 3, and a poking needle 31 is arranged on the upper surface of the separating rod 3. When polyethylene plastic film after cutting device 5 cuts passes separating rod 3, electric putter 8 drives separating rod 3 along the spout round trip movement of frame 6, makes and dials needle 31 and remove along polyethylene plastic film's edge all the time to two piece adjacent polyethylene plastic film after will cutting better separate, the subsequent rolling of being convenient for.
As shown in fig. 2, the setting needle 31 is of a conical shape, and the maximum thickness of the setting needle 31 is less than 1 mm. On one hand, the fine shifting needle 31 is beneficial to realizing the separation of two adjacent polyethylene plastic films, and meanwhile, the polyethylene plastic films cannot be damaged, so that the quality of the polyethylene plastic films after being cut is ensured.
The specific process is as follows:
one end of a polyethylene plastic film wound on a raw material roller 1 passes through a transmission roller 2, a cutting device 5 and a separating rod 3 and then is wound on a winding roller 4, a motor 7 drives the winding roller 4 to rotate, the polyethylene plastic film on the raw material roller 1 is pulled to move, when the polyethylene plastic film passes below a laser 54, the laser 54 cuts the polyethylene plastic film, and while cutting, an air cylinder 9 pushes a mounting rack 52 to move back and forth along a sliding rail 51 so as to drive the laser 54 to reciprocate, so that the edge of the polyethylene plastic film cut by the laser 54 presents a wave shape, the cutting of any shape of the polyethylene plastic film can be realized, the application range of the polyethylene plastic film cutting is widened, in the process that the mounting rack 52 moves back and forth along the sliding rail 51, a gear 53 moves on the sliding rail 51 and rotates, and a connecting shaft 56 and a turntable 55 synchronously rotate along with the gear 53, because the connecting shaft 56 is arranged eccentrically, the connecting shaft 56 always periodically moves to the position right below the laser 54 at the moment when the cylinder 9 changes the moving direction, and the laser emitted by the laser 54 is shielded, so that the situation that the cutting is poor due to the fact that the inflection point position of the edge of the polyethylene plastic film is excessively burnt because the time consumption is relatively long when the cylinder 9 changes the moving direction is avoided, the cutting quality is further ensured, the gear 53 and the sliding rail 51 which are made of high-temperature resistant materials can prevent the deformation and influence the transmission precision, the edge shape of the cut polyethylene plastic film deviates from the expectation, and the cutting effect is ensured.
The design of connecting axle 56 and carousel 55 is favorable to gathering of laser instrument 54 and is hot, thereby improve cutting effect, simultaneously the cooling water in connecting axle 56 and the carousel 55 can carry out local cooling to laser instrument 54, avoid near laser instrument 54 temperature rise too high, the cooling water heat absorption vaporization back in the water storage chamber 57, steam passes through hose and solenoid valve messenger cylinder 9 round trip movement, the make full use of the energy has been realized, the hot-air exhaust through cylinder 9 preheats the cooling water in the water tank 10, and get back to once more and realize the circulation in the water storage chamber 57, the volume of steam production in the water storage chamber 57 has been guaranteed, thereby guarantee that the power of cylinder 9 is sufficient, realize cutting device 5's normal work.
When polyethylene plastic film after cutting device 5 cuts passes separating rod 3, electric putter 8 drives separating rod 3 along the spout round trip movement of frame 6, makes and dials needle 31 and remove along polyethylene plastic film's edge all the time to two piece adjacent polyethylene plastic film after will cutting better separate, the subsequent rolling of being convenient for. On one hand, the fine shifting needle 31 is beneficial to realizing the separation of two adjacent polyethylene plastic films, and meanwhile, the polyethylene plastic films cannot be damaged, so that the quality of the polyethylene plastic films after being cut is ensured.
While one embodiment of the present invention has been described above, the present invention is not limited to the above embodiment, and various modifications can be made without departing from the scope of the present invention.
(A) In the above embodiments, the release lever is reciprocated by the electric push rod, but the present invention is not limited thereto, and the release lever may be driven by an air cylinder.
Industrial applicability
According to the invention, the production method of the nonlinear edge polyethylene plastic film can meet the cutting requirement of the polyethylene plastic film on any cutting edge shape under the condition of not changing the process, and ensures the cutting quality, so that the production method of the nonlinear edge polyethylene plastic film is useful in the field of plastic film production.
Claims (5)
1. A method for producing a polyethylene plastic film is characterized by comprising the following steps: the method comprises the following steps:
the method comprises the following steps: putting polyethylene particles and polyethylene terephthalate fiber sheets into a mixer for mixing and stirring, wherein the stirring temperature is 70 ℃;
step two: putting the mixed raw materials in the first step into a melting stirrer, wherein the melting temperature is 250 ℃;
step three: extruding and paving the molten liquid melted in the step two through an extrusion roller, ventilating to reduce the surface temperature of the film product to 60 ℃, and then pressing and molding through a gap plate;
step four: the film pressed and formed in the third step is placed at room temperature for cooling for 24 hours, and then the finished product is wound on a raw material roller;
step five: cutting the polyethylene plastic film wound on the raw material roller in the fourth step by using a plastic film cutting device, cutting the polyethylene plastic film with a nonlinear edge, rolling and packaging;
the plastic film slitting device in the fifth step comprises a raw material roller (1), a transmission roller (2), a separating rod (3), a winding roller (4), a cutting device (5) and a rack (6), wherein the raw material roller (1) is located at the foremost end of the rack (6); the driving roller (2) is positioned on the right side of the raw material roller (1); the cutting device (5) is positioned at the upper left of the separating rod (3), the number of the cutting devices (5) is at least two, and the cutting devices (5) can cut the polyethylene plastic film into a plurality of pieces; the separating rod (3) is positioned on the right side of the transmission roller (2), and the separating rod (3) is used for separating the cut polyethylene plastic film, so that the subsequent rolling is facilitated; the winding roller (4) is positioned on the right side of the separating rod (3), and the winding roller (4) is used for winding the cut polyethylene plastic films separately to realize collection; the cross section of the frame (6) is U-shaped, the raw material roller (1), the transmission roller (2) and the winding roller (4) are rotatably connected with the frame (6), and one sides of the transmission roller (2) and the winding roller (4) are provided with motors (7); wherein,
the cutting device (5) comprises two sliding rails (51), an installation frame (52), a gear (53) and a laser (54), the sliding rails (51) are horizontally installed on the rack (6), the two sliding rails (51) are parallel to each other, and a tooth-shaped structure is arranged on the upper surface of each sliding rail (51); the number of the mounting racks (52) is at least two, the mounting racks (52) are placed on the upper surfaces of the sliding rails (51), the mounting racks (52) are of rectangular frame structures, flanges are arranged on the left side and the right side of the sliding rails (51) at the bottoms of the mounting racks (52), the flanges are used for limiting the mounting racks (52) on the sliding rails (51), and cross beams (521) are arranged at the tops of the mounting racks (52); the number of the gears (53) is two, the gears (53) are arranged in the mounting rack (52), the two gears (53) are respectively rotatably mounted on the left side and the right side of the mounting rack (52) through cantilever shafts, one ends of the two cantilever shafts, which are far away from the rack (6), are respectively provided with a turntable (55), the two turntables (55) are connected through a connecting shaft (56), the axis of the connecting shaft (56) deviates from the axis of the cantilever shafts, the two gears (53) are respectively positioned above the two sliding rails (51), and gapless meshing is realized between the gear (53) and the tooth-shaped structures of the sliding rails (51); the laser (54) is fixed on a cross beam (521) of the mounting frame (52), the laser (54) is located between the two gears (53), the laser (54) penetrates through a connecting line of the centers of the two gears (53), and the laser (54) is used for carrying out laser cutting on the polyethylene plastic film; the air cylinder (9) is arranged on the rack (6), a fixing seat is arranged on the side face of the mounting rack (52), a piston rod of the air cylinder (9) is connected with the fixing seat of the mounting rack (52), and the air cylinder (9) is used for pushing the mounting rack (52) to move along the sliding rail (51).
2. A method for producing a polyethylene plastic film according to claim 1, characterized in that: the gear (53) is made of a powder metallurgy high-temperature alloy material, and a powder metallurgy high-temperature alloy layer is also arranged on the surface of the tooth-shaped structure of the sliding rail (51).
3. A method for producing a polyethylene plastic film according to claim 1, characterized in that: the rotary table (55) is of a built-in cavity structure, the connecting shaft (56) is a hollow shaft, the interior of the rotary table (55) is communicated with the connecting shaft (56) to form a water storage cavity (57), and cooling water is stored in the water storage cavity (57); the cantilever shaft is provided with a vent hole along the axis direction, the vent hole of the cantilever shaft is communicated with the water storage cavity (57), one end of one cantilever shaft, which is positioned on the outer side of the mounting rack (52), is connected with the air cylinder (9) through a hose and an electromagnetic valve, the other end of the other cantilever shaft, which is positioned on the outer side of the mounting rack (52), is connected with the water tank (10) through a hose and a one-way valve (11), the water tank (10) is used for supplying cooling water into the water storage cavity (57), and the water tank (10) is communicated with the exhaust hole of the electromagnetic valve through a hose.
4. A method for producing a polyethylene plastic film according to claim 1, characterized in that: the position level of frame (6) at separator bar (3) is provided with the spout, and separator bar (3) both ends are located the spout of frame (6), and frame (6) are improved level and are installed electric putter (8), and electric putter (8) are passed the spout of frame (6) and are connected with separator bar (3), and separator bar (3) upper surface is provided with dials needle (31).
5. A process for producing a polyethylene plastic film according to claim 4, characterized in that: the poking needle (31) is conical, and the maximum thickness of the poking needle (31) is smaller than 1 mm.
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| Application Number | Priority Date | Filing Date | Title |
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| CN201810954731.8A CN109014607B (en) | 2018-08-21 | 2018-08-21 | Production method of polyethylene plastic film |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810954731.8A CN109014607B (en) | 2018-08-21 | 2018-08-21 | Production method of polyethylene plastic film |
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| CN109014607B true CN109014607B (en) | 2020-06-05 |
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| CN113290896A (en) * | 2021-06-09 | 2021-08-24 | 昆山品丰包装材料有限公司 | Production method suitable for electronic product packaging film |
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| CN109014607A (en) | 2018-12-18 |
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Effective date of registration: 20200514 Address after: 523000 Fumin Industrial Park, Dalang Town, Dongguan City, Guangdong Province Applicant after: AVOTECK FILM (DONGGUAN) Co.,Ltd. Address before: 610065 School of chemical engineering, Sichuan University, No. 24 south section of first ring road, Sichuan, Chengdu Applicant before: Wang Shun |
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