CN114905715B - Preparation process and production equipment of biaxially oriented polypropylene dual-heat green protection film - Google Patents
Preparation process and production equipment of biaxially oriented polypropylene dual-heat green protection film Download PDFInfo
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- CN114905715B CN114905715B CN202210130436.7A CN202210130436A CN114905715B CN 114905715 B CN114905715 B CN 114905715B CN 202210130436 A CN202210130436 A CN 202210130436A CN 114905715 B CN114905715 B CN 114905715B
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
- B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
- B29C48/00—Extrusion moulding, i.e. expressing the moulding material through a die or nozzle which imparts the desired form; Apparatus therefor
- B29C48/001—Combinations of extrusion moulding with other shaping operations
- B29C48/0018—Combinations of extrusion moulding with other shaping operations combined with shaping by orienting, stretching or shrinking, e.g. film blowing
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
- B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
- B29C48/00—Extrusion moulding, i.e. expressing the moulding material through a die or nozzle which imparts the desired form; Apparatus therefor
- B29C48/022—Extrusion moulding, i.e. expressing the moulding material through a die or nozzle which imparts the desired form; Apparatus therefor characterised by the choice of material
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
- B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
- B29C48/00—Extrusion moulding, i.e. expressing the moulding material through a die or nozzle which imparts the desired form; Apparatus therefor
- B29C48/03—Extrusion moulding, i.e. expressing the moulding material through a die or nozzle which imparts the desired form; Apparatus therefor characterised by the shape of the extruded material at extrusion
- B29C48/07—Flat, e.g. panels
- B29C48/08—Flat, e.g. panels flexible, e.g. films
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
- B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
- B29C48/00—Extrusion moulding, i.e. expressing the moulding material through a die or nozzle which imparts the desired form; Apparatus therefor
- B29C48/16—Articles comprising two or more components, e.g. co-extruded layers
- B29C48/18—Articles comprising two or more components, e.g. co-extruded layers the components being layers
- B29C48/21—Articles comprising two or more components, e.g. co-extruded layers the components being layers the layers being joined at their surfaces
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
- B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
- B29C48/00—Extrusion moulding, i.e. expressing the moulding material through a die or nozzle which imparts the desired form; Apparatus therefor
- B29C48/25—Component parts, details or accessories; Auxiliary operations
- B29C48/28—Storing of extruded material, e.g. by winding up or stacking
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
- B29K—INDEXING SCHEME ASSOCIATED WITH SUBCLASSES B29B, B29C OR B29D, RELATING TO MOULDING MATERIALS OR TO MATERIALS FOR MOULDS, REINFORCEMENTS, FILLERS OR PREFORMED PARTS, e.g. INSERTS
- B29K2023/00—Use of polyalkenes or derivatives thereof as moulding material
- B29K2023/10—Polymers of propylene
- B29K2023/12—PP, i.e. polypropylene
Abstract
The invention discloses a preparation process and production equipment of a biaxially oriented polypropylene dual-heat green protection film, wherein the film sequentially comprises an upper surface layer, a last surface layer, a core layer, a next surface layer and a lower surface layer, wherein the core layer is a main extrusion layer, homo-polypropylene 90-95% and a stiffness increasing agent 5-10% are selected, the last surface layer is a color master layer, and homo-green color master batch 100% is selected; 100% of homopolymerized polypropylene is selected as the next surface layer; the upper surface layer and the lower surface layer are heat sealing layers, and 94% -98% of copolymerized polypropylene and 2% -6% of anti-sticking agent are mixed. In the process that the polypropylene double-heat green protection film raw material moves from one side of the material conveying roller to one side close to the winding device, the width of the polypropylene double-heat green protection film is gradually widened by the two pairs of transverse stretching rollers, and the two pairs of transverse stretching rollers are smooth in surface and can be always clamped with the two sides of the polypropylene double-heat green protection film raw material.
Description
Technical Field
The invention relates to the technical field of BOPP protective films, in particular to a preparation process and production equipment of a biaxially oriented polypropylene dual-heat green protective film.
Background
Be applied to BOPP protection film that electron device process was wasted discharge, current production technology is that it has the glue of colour to coat a layer on ordinary light membrane, form the film of wasting discharge, can play both to protect electron device and can discern categorised effect through the colour is quick, but at the gluey glue of coating on the light membrane coloured, the process is many, the rubber coating cost is high, and there is the colour shortcoming of easy fading and decoloration, not only can not keep electron device's cleanliness factor still can cause the pollution, so the coloured protection film of BOPP of urgent need in the market.
Meanwhile, in the current process of producing the polypropylene dual-heat green protection film, the edges of the polypropylene dual-heat green protection film are usually clamped by a plurality of groups of fixing clamps, and then the polypropylene dual-heat green protection film is synchronously stretched, however, the stretching method of the base film can cause the stretching unevenness of the polypropylene dual-heat green protection film, and the polypropylene dual-heat green protection film cannot be continuously stretched in multiple directions; in addition, after the raw material of the current polypropylene double-heat green protection film is extruded from the extruder, an operator is required to manually flatten the molten raw material of the polypropylene double-heat green protection film and sequentially pass through a plurality of groups of stretching guide rollers, so that the process is very time-delayed, and the raw material of the polypropylene double-heat green protection film cannot automatically pass through the plurality of groups of guide rollers, so that the use convenience of the manufacturing equipment is reduced; meanwhile, when the conventional polypropylene double-heat green protection film manufacturing equipment winds the polypropylene double-heat green protection film, the wound polypropylene double-heat green protection film cannot be switched quickly, so that the practicability of the whole base film manufacturing equipment is reduced.
Disclosure of Invention
The invention aims to provide a preparation process and production equipment of a biaxially oriented polypropylene dual-thermal green protection film, which aim to solve the related problems in the background technology.
In order to achieve the purpose, the invention provides the following technical scheme: a preparation process of a biaxially oriented polypropylene dual-heat green protection film comprises the following steps:
s1, blending raw materials: the film sequentially comprises an upper surface layer, a last surface layer, a core layer, a next surface layer and a lower surface layer, wherein the core layer is a main extrusion layer, 90-95% of homo-polypropylene and 5-10% of a stiffness increasing agent are selected, the last surface layer is a color master layer, and 100% of homo-green color master batch is selected; 100% of homo-polypropylene is selected as the next subsurface layer; the upper surface layer and the lower surface layer are heat sealing layers, and 94% -98% of co-polypropylene and 2% -6% of anti-sticking agent are mixed;
s2, extrusion molding: respectively adding the raw materials of the upper surface layer, the core layer, the lower surface layer and the lower surface layer into respective extruders, and co-extruding and compounding to form a casting sheet with the thickness of 2.5-4.0 mm;
s3, stretching and shaping: firstly, transversely preheating the cast sheet formed in the step S2, transversely stretching, finally shaping, then longitudinally preheating, longitudinally lifting through a longitudinal lifting structure, shaping, cooling and finally winding.
Preferably, in the step 2, after the core layer raw material enters the twin-screw extruder, after redundant air needs to be removed during raw material plasticization, secondary plasticization, metering and filtration are carried out, and the temperature of the core layer raw material is set to be 230-250 ℃; extruding and filtering the raw materials of each surface layer by a single-screw extruder and a double-screw extruder, setting the temperature of the upper surface layer and the lower surface layer at 220-240 ℃, setting the temperature of the upper surface layer and the lower surface layer at 225-250 ℃, and finally extruding the five layers of raw materials from a die head together through corresponding connecting pipes.
Preferably, the die temperature in step 3 is set to 225-235 ℃, the chill roll temperature is set to 25-32 ℃, and the cooling water pool temperature is 25-38 ℃. In the longitudinal stretching process, the temperature of the preheating zone is 116-130 ℃, the temperature of the stretching roller is 105-112 ℃, the stretching magnification is 4.6-4.85 times, the temperature of the setting roller is 110-130 ℃, in the transverse stretching process, the temperature of the preheating zone is 170-176 ℃, the temperature of the stretching zone is 150-156 ℃, the temperature of the setting zone is 155-165 ℃, the temperature of the cooling zone is indoor temperature, and the maximum stretching magnification of the thick sheet is 7.5-8.8 times.
Preferably: the middle position of the top of the mounting table is provided with a bottom bin, the middle positions of two ends in the bottom bin are symmetrically provided with electric hydraulic cylinders, two groups of output ends of the electric hydraulic cylinders are jointly provided with a top bin, two ends in the top bin and the bottom bin are symmetrically provided with transverse stretching rollers, two ends of the transverse stretching rollers are symmetrically provided with universal joints, two ends of two sides in the top bin and the bottom bin are symmetrically provided with rotating shafts, eight groups of one ends of the rotating shafts are respectively fixedly connected with an adjacent group of universal joints, one ends of the outer sides of the four groups of rotating shafts at the same end are all provided with second transmission gears, the outer sides of the two groups of rotating shafts close to one ends of the second transmission gears are symmetrically provided with second bevel gears, the middle position of the top in the top bin is provided with an electric heating plate, one sides of the top bin and the bottom bin close to the second transmission gears are jointly provided with a longitudinal stretching assembly, the middle position of one side of the top of the mounting table is uniformly provided with a material conveying roller, one end of the outer side of the material conveying roller is commonly provided with a third transmission assembly, one side of the top of the mounting table, which is close to the material conveying roller, is provided with a protection bin, the material conveying roller is positioned in the protection bin, the middle position of the inner part of the bottom bin is provided with a trapezoidal bin, the inner part of the trapezoidal bin is uniformly provided with a guide roller, the bottom of the mounting table is provided with a driving device in transmission connection with the guide roller, the driving device comprises a third driving motor, a second chain wheel and a second chain, the middle position of the bottom of the mounting table is provided with a third driving motor, the middle positions of the outer sides of the third driving motor and the guide roller are both provided with the second chain wheel, the outer side of the top of the mounting table, which is far away from the material conveying roller, is provided with a winding device, and a control panel is installed at one end of the winding device frame body and is respectively electrically connected with the electric heating plate and the electric hydraulic cylinder through leads.
Preferably, vertical tensile subassembly includes first drive assembly, a driving motor, squeeze roll, flattening roller, U type frame, first conical gear and annular cutter, the one side symmetry that the feed delivery roller was kept away from to top storehouse and end storehouse has U type frame, and the inboard intermediate position department symmetry of two sets of U type frames is provided with flattening roller, the inside one side of keeping away from a storehouse of U type frame is provided with squeeze roll, and annular cutter is installed to the both ends symmetry in a set of flattening roller outside in bottom, and the both ends symmetry in this group flattening roller outside install with the first conical gear of second conical gear intermeshing, and the bottom is a set of first driving motor who is connected with flattening roller transmission is installed to the one end of U type frame, first driving motor's output is provided with the first drive assembly who is connected with a set of squeeze roll one end transmission, and a set of one end that first driving motor was kept away from to the squeeze roll is connected with the universal joint transmission through the electric heating board, control panel passes through the wire and is connected with first driving motor electricity.
Preferably, the coiling mechanism includes servo motor, wind-up roll, carousel, driven gear, mounting bracket, driving gear and second drive assembly, the mounting bracket is installed to one side that defeated material roller was kept away from at the mount table top, and the intermediate position department symmetry of both sides is provided with the carousel in the mounting bracket, and is two sets of the position department in the inboard non-centre of a circle of carousel evenly is provided with four groups of wind-up rolls, and is a set of servo motor who is connected with adjacent a set of carousel transmission, four groups servo motor's one end that servo motor was kept away from to the wind-up roll is all installed with universal joint intermeshing's driven gear, the position department in the inboard non-centre of a circle of mounting bracket is provided with the driving gear with driven gear mutually supported, the one end in the driving gear pivot outside is provided with second drive assembly, control panel passes through the wire and is connected with the servo motor electricity.
Preferably, the mount table top is close to one side of defeated material roller and installs the blowing storehouse, and the blowing storehouse is located the top of defeated material roller, the inside bilateral symmetry of blowing storehouse is provided with the crowded material roller of mutually supporting, and is two sets of crowded material roller passes the blowing storehouse and installs intermeshing's third drive gear with one end, the second driving motor who is connected with a set of crowded material roller transmission is installed to the one end that third drive gear was kept away from to the blowing storehouse, intermeshing's first drive gear is installed with one end to second driving motor's output and a set of defeated material roller.
Preferably, first drive assembly includes first belt pulley and first drive belt, and is a set of first belt pulley is all installed to the one end of squeeze roll and first driving motor's output, and the outside of two sets of first belt pulleys is provided with first drive belt jointly.
Preferably, the second transmission assembly comprises a second belt pulley and a second transmission belt, the second belt pulley is installed at one end of the group of squeezing rollers and one end of the rotating shaft of the driving gear, and the second transmission belt is arranged on the outer sides of the two groups of second belt pulleys.
Preferably, the third transmission assembly comprises a first chain wheel and a first chain, the same ends of the twelve groups of conveying rollers are provided with the chain wheels, and the outer sides of the twelve groups of chain wheels are provided with the chains together.
Compared with the prior art, the invention provides a preparation process and production equipment of a biaxially oriented polypropylene dual-heat green protection film, and the preparation process and the production equipment have the following beneficial effects:
1. the invention discloses a multilayer co-extrusion manufacturing process formula and a production process of the dual-heat green protective film, meets the market demand, reduces the manufacturing process and the gluing cost compared with the existing process of manufacturing the waste discharge film by coating colored glue on a common light film, and the color can not be faded.
2. When the polypropylene double-heat green protection film raw material needs to be stretched, the two pairs of transverse stretching rollers respectively clamp two ends of the polypropylene double-heat green protection film raw material, and the two pairs of transverse stretching rollers rotate oppositely, in the process that the polypropylene double-heat green protection film raw material moves from one side of a material conveying roller to one side close to a winding device, the width of the polypropylene double-heat green protection film is gradually widened by the two pairs of transverse stretching rollers, the two pairs of transverse stretching rollers are smooth in surface and can be always clamped with two sides of the polypropylene double-heat green protection film raw material, the phenomenon that the polypropylene double-heat green protection film is stretched unevenly due to gaps between clamps can be avoided, the phenomenon that the edge position of the polypropylene double-heat green protection film is uneven can not occur, after the polypropylene double-heat green protection film is stretched transversely, the two groups of flattening rollers are matched with an annular cutter, the polypropylene double-heat green protection film can be flattened automatically, redundant parts on two sides of the polypropylene double-heat green protection film can be cut off automatically, the double-heat green protection film can be produced automatically, and the double-heat green protection film can be produced continuously, and the double-heat protection film can reach the standard.
3. After the raw material of the molten polypropylene double-heat green protection film falls onto the plurality of groups of material conveying rollers, the two groups of electric hydraulic cylinders are controlled to extend, so that the top bin and the bottom bin are separated, two pairs of transverse stretching rollers are separated, two groups of extruding rollers and flattening rollers are separated from each other, at the moment, the plurality of groups of material conveying rollers can automatically convey the raw material of the molten polypropylene double-heat green protection film to the inside of the bottom bin, when the raw material of the polypropylene double-heat green protection film passes through the guide rollers, the driving device is controlled to drive the plurality of groups of guide rollers in the trapezoidal bin to synchronously rotate in the same direction, the raw material of the molten polypropylene double-heat green protection film is automatically moved continuously to the direction of the winding device until the head end of the raw material of the polypropylene double-heat green protection film gradually passes through the group of extruding rollers and the flattening rollers at the bottom, so that an operator can conveniently fix the head end of the polypropylene double-heat green protection film onto the winding rollers, and the operation of the operator does not need to manually insert the polypropylene double-heat green protection film among the plurality of guide rollers, thereby simplifying the use steps of the whole equipment.
4. When the produced polypropylene dual-thermal green protection film is rolled, the head end of the polypropylene dual-thermal green protection film is fixed on a group of rolling rollers farthest from an installation platform, then a squeezing roller drives a driving gear to rotate through a second transmission component, the driving gear drives a corresponding rolling roller to rotate through a group of connected driven gears, so that the polypropylene dual-thermal green protection film is rolled, the polypropylene dual-thermal green protection film passes through the outer side of a second group of rolling rollers at the top before being rolled by the first group of rolling rollers, after the first group of rolling rollers are fully rolled with the polypropylene dual-thermal green protection film, a servo motor is controlled to rotate anticlockwise for 45 degrees, a driven gear on the first group of rolling rollers is not meshed with the driving gear any more, then the polypropylene dual-thermal green protection film is manually cut off, the head end of the cut polypropylene dual-thermal green protection film is immediately fixed to the outer side of the second group of rolling rollers, then the servo motor is controlled to drive a rotary table to rotate anticlockwise for 45 degrees, the driven gear on one end of the second group of rolling rollers is meshed with the driving the second group of rolling rollers to start rolling of the polypropylene dual-thermal green protection film, the dual-thermal green protection film is quickly switched, and the polypropylene dual-thermal green protection film is further produced without the longitudinal stretching device and the polypropylene dual-thermal green protection film is further improved.
Drawings
FIG. 1 is a top view of the present invention;
FIG. 2 is a top view of the take-up device and top bin of the present invention shown disassembled;
FIG. 3 is a top cross-sectional view of the winding device of the present invention after being disassembled;
FIG. 4 is a side view of the present invention;
FIG. 5 is a bottom view of the top bin of the present invention;
FIG. 6 is a schematic perspective view of the bottom bin of the present invention;
FIG. 7 is an enlarged view taken at A of FIG. 3 according to the present invention;
fig. 8 is an enlarged view of fig. 3 at B according to the present invention.
In the figure: 1. an installation table; 2. carrying out top bin; 3. a longitudinal stretching assembly; 301. a first transmission assembly; 302. a first drive motor; 303. a squeeze roll; 304. flattening rollers; 305. a U-shaped frame; 306. a first bevel gear; 307. a ring-shaped cutter; 4. a control panel; 5. a winding device; 501. a servo motor; 502. a wind-up roll; 503. a turntable; 504. a driven gear; 505. a mounting frame; 506. a driving gear; 507. a second transmission assembly; 6. a third transmission gear; 7. an electrical heating plate; 8. a protection bin; 9. a third transmission assembly; 10. a discharge bin; 11. an extrusion roller; 12. a delivery roller; 13. a second drive motor; 14. a universal joint; 15. a first transmission gear; 16. a trapezoidal bin; 17. an electric hydraulic cylinder; 18. a second transmission gear; 19. a drive device; 20. a rotating shaft; 21. a guide roller; 22. a bottom bin; 23. a transverse stretching roller; 24. a second bevel gear.
Detailed Description
The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
Referring to fig. 1-8, the present invention provides a technical solution: a preparation process of a biaxially oriented polypropylene dual-heat green protection film comprises the following steps:
s1, blending raw materials: the film sequentially comprises an upper surface layer, a last surface layer, a core layer, a next surface layer and a lower surface layer, wherein the core layer is a main extrusion layer, 90-95% of homo-polypropylene and 5-10% of a stiffness increasing agent are selected, the last surface layer is a color master layer, and 100% of homo-green color master batch is selected; 100% of homo-polypropylene is selected as the next subsurface layer; the upper surface layer and the lower surface layer are heat sealing layers, and 94% -98% of copolymerized polypropylene and 2% -6% of anti-sticking agent are mixed;
s2, extrusion molding: respectively adding the raw materials of the upper surface layer, the upper secondary surface layer, the core layer, the lower secondary surface layer and the lower surface layer into respective extruders, and co-extruding and compounding to form a casting sheet with the thickness of 2.5-4.0 mm;
s3, stretching and shaping: firstly, transversely preheating the cast sheet formed in the step S2, transversely stretching, finally shaping, then longitudinally preheating, longitudinally lifting through a longitudinal lifting structure, shaping, cooling and finally winding.
Further, in the step 2, after the core layer raw material enters a double-screw extruder, after redundant air needs to be removed during raw material plasticization, secondary plasticization, metering and filtration are carried out, and the temperature of the core layer raw material is set to be 230-250 ℃; extruding and filtering raw materials of each surface layer by a single-screw extruder and a double-screw extruder, setting the temperature of the upper surface layer and the lower surface layer at 220-240 ℃, setting the temperature of the upper surface layer and the lower surface layer at 225-250 ℃, and finally extruding the five layers of raw materials from a die head together through corresponding connecting pipes.
Further, the die temperature in step 3 is set to 225-235 ℃, the chill roll temperature is set to 25-32 ℃, and the cooling water pool temperature is 25-38 ℃. In the longitudinal stretching process, the temperature of the preheating zone is 116-130 ℃, the temperature of the stretching roller is 105-112 ℃, the stretching magnification is 4.6-4.85 times, the temperature of the setting roller is 110-130 ℃, in the transverse stretching process, the temperature of the preheating zone is 170-176 ℃, the temperature of the stretching zone is 150-156 ℃, the temperature of the setting zone is 155-165 ℃, the temperature of the cooling zone is indoor temperature, and the maximum stretching magnification of the thick sheet is 7.5-8.8 times.
Further, a manufacturing equipment for manufacturing process of polypropylene double-heating green protection film based on multi-directional stretching, which comprises a mounting table 1, is characterized in that: a bottom bin 22 is arranged in the middle of the top of the mounting table 1, electric hydraulic cylinders 17 are symmetrically arranged in the middle of two ends in the bottom bin 22, a top bin 2 is arranged at the output end of the two groups of electric hydraulic cylinders 17 together, transverse stretching rollers 23 are symmetrically arranged at two ends in the top bin 2 and the bottom bin 22, universal joints 14 are symmetrically arranged at two ends of the transverse stretching rollers 23, rotating shafts 20 are symmetrically arranged at two ends of two sides in the top bin 2 and the bottom bin 22, one end of each of eight groups of rotating shafts 20 is fixedly connected with the adjacent group of universal joints 14, a second transmission gear 18 is arranged at one end of the same end outside the four groups of rotating shafts 20, a second conical gear 24 is symmetrically arranged outside the two groups of rotating shafts 20 close to one end of the second transmission gear 18, an electric heating plate 7 is arranged in the middle of the top bin 2, and a longitudinal stretching assembly 3 is arranged at one side of the top bin 2 and one side of the bottom bin 22 close to the second transmission gear 18 together, a material conveying roller 12 is uniformly arranged at the middle position of one side of the top of the mounting table 1, a third transmission component 9 is commonly arranged at one end of the outer side of the material conveying roller 12, a protection bin 8 is arranged at one side of the top of the mounting table 1 close to the material conveying roller 12, the material conveying roller 12 is positioned inside the protection bin 8, a trapezoidal bin 16 is arranged at the middle position inside a bottom bin 22, a guide roller 21 is uniformly arranged inside the trapezoidal bin 16, a driving device 19 in transmission connection with the guide roller 21 is arranged at the bottom of the mounting table 1, the driving device 19 comprises a third driving motor, a second chain wheel and a second chain, a third driving motor is arranged at the middle position of the bottom of the mounting table 1, the third driving motor and the middle position outside the guide roller 21 are both provided with the second chain wheel, a second chain is commonly arranged outside the second chain wheel, a winding device 5 is arranged at one side of the top of the mounting table 1 far away from the material conveying roller 12, and one end of the frame body of the winding device 5 is provided with a control panel 4, and the control panel 4 is respectively and electrically connected with the electric heating plate 7 and the electric hydraulic cylinder 17 through leads.
Further, the longitudinal stretching assembly 3 comprises a first transmission assembly 301, a first driving motor 302, squeezing rollers 303, flattening rollers 304, U-shaped frames 305, first bevel gears 306 and annular cutters 307, the U-shaped frames 305 are symmetrically arranged on one sides of the top bin 2 and the bottom bin 22 far away from the material conveying roller 12, the flattening rollers 304 are symmetrically arranged at the middle positions of the inner sides of the two groups of U-shaped frames 305, the squeezing rollers 303 are arranged on one sides of the inner sides of the U-shaped frames 305 far away from the top bin 2, the annular cutters 307 are symmetrically arranged at two ends of the outer sides of the group of flattening rollers 304, the first bevel gears 306 meshed with the second bevel gears 24 are symmetrically arranged at two ends of the outer sides of the group of flattening rollers 304, the first driving motor 302 in transmission connection with the flattening rollers 304 is arranged at one end of the group of the U-shaped frames 305 at the bottom, the first transmission assembly 301 in transmission connection with one ends of the group of the squeezing rollers 303 is arranged at the output end of the group of the squeezing rollers 303 far away from the first driving motor 302, and is in transmission connection with the first heating plate 14 through an electric 7, and the control panel 4 is electrically connected with the first driving motor 302 through a universal heating plate 302.
Further, the winding device 5 comprises a servo motor 501, winding rollers 502, rotary discs 503, driven gears 504, an installation frame 505, driving gears 506 and second transmission assemblies 507, the installation frame 505 is installed on one side, far away from the material conveying roller 12, of the top of the installation table 1, the rotary discs 503 are symmetrically arranged at the middle positions of two sides in the installation frame 505, four groups of winding rollers 502 are evenly arranged at positions, which are not located at the center of a circle, of the inner sides of the two groups of rotary discs 503, the servo motor 501 in transmission connection with the adjacent group of rotary discs 503 is installed at one end of the group of installation frame 505, the driven gears 504 which are meshed with the universal joints 14 are installed at one ends, far away from the servo motor 501, of the four groups of winding rollers 502, the driving gears 506 which are matched with the driven gears 504 are arranged at positions, which are not located at the center of a circle, the second transmission assemblies 507 are arranged at one end of the outer sides of the driving gears 506, and the control panel 4 is electrically connected with the servo motor 501 through wires.
Further, a discharging bin 10 is installed at one side, close to a material conveying roller 12, of the top of the mounting platform 1, the discharging bin 10 is located above the material conveying roller 12, extruding rollers 11 which are matched with each other are symmetrically arranged on two sides inside the discharging bin 10, the same ends of the two groups of extruding rollers 11 penetrate through the discharging bin 10 and are provided with mutually-meshed third transmission gears 6, one end, far away from the third transmission gears 6, of the discharging bin 10 is provided with a second driving motor 13 which is in transmission connection with the group of extruding rollers 11, and mutually-meshed first transmission gears 15 are installed at the output end of the second driving motor 13 and the same end of the group of material conveying roller 12.
Further, first drive assembly 301 includes first belt pulley and first drive belt, and first belt pulley is all installed to the one end of a set of squeeze roll 303 and the output of first driving motor 302, and the outside of two sets of first belt pulleys is provided with first drive belt jointly, helps driving the stable rotation of squeeze roll 303.
Further, the second transmission assembly 507 includes a second belt pulley and a second transmission belt, the second belt pulley is installed at one end of the group of squeezing rollers 303 and one end of the rotating shaft of the driving gear 506, and the second transmission belt is jointly arranged at the outer sides of the two groups of second belt pulleys, which is helpful for driving the squeezing rollers 303 to rotate stably.
Further, the third transmission assembly 9 includes a first chain wheel and a first chain, the same ends of the twelve groups of material conveying rollers 12 are all provided with chain wheels, and the outer sides of the twelve groups of chain wheels are provided with chains together, which is helpful for driving all the material conveying rollers 12 to synchronously rotate in the same direction.
In embodiment 1, as shown in fig. 1 to 8, the second driving motor 13 is controlled by the control panel 4 to drive the two sets of extrusion rollers 11 to rotate in opposite directions, so as to clamp the molten polypropylene dual-thermal green protection film raw material into a flat shape and fall onto the multiple sets of feed delivery rollers 12, the second driving motor 13 can drive the multiple sets of feed delivery rollers 12 to rotate synchronously and in the same direction through the transmission of the first driving gear 15 and the third driving component 9, so as to gradually convey the molten polypropylene dual-thermal green protection film raw material in a direction close to the mounting rack 505, so that the polypropylene dual-thermal green protection film raw material is gradually conveyed onto the multiple sets of guide rollers 21, at this time, the third driving motor is controlled to cooperate with the second sprocket and the second chain to drive the multiple sets of guide rollers 21 to rotate synchronously and in the same direction, so as to automatically continue to move the molten polypropylene dual-thermal green protection film raw material in a direction of the winding device 5, until the head end of the polypropylene dual-thermal green protection film raw material gradually passes through the bottom set of extrusion rollers 303 and the head end of the flattening roller 304, and then an operator fixes the polypropylene dual-thermal green protection film on the first set of winding roller 502 farthest from the mounting rack 1, and prepares for production before the production device 502.
Example 2, as shown in fig. 1 to 8, after the preparation work before the use of the apparatus is completed, two sets of electric hydraulic cylinders 17 are controlled to shorten, so that the top bin 2 and the bottom bin 22 are attached again, and the ends of the two pairs of transverse stretching rollers 23, which are close to the feeding roller 12, clamp both sides of the raw material of the polypropylene double-heat green protective film, and then the production of the polypropylene double-heat green protective film is started, the electric heating plate 7 is controlled to stably bake and heat the upper side of the guide roller 21, so that the raw material of the polypropylene double-heat green protective film above the guide roller 21 is more easily stretched, the flat polypropylene double-heat green protective film is conveyed to the sets of guide rollers 21 by the sets of feeding rollers 12, at this time, the first driving motor 302 is controlled to drive the flattening rollers 304 to rotate clockwise, the transverse stretching rollers 23 at both ends inside the bottom bin 22 are driven to rotate oppositely by the first bevel gear 306 and the second bevel gear 24, the two sets of transverse stretching rollers 23 at both ends inside the bottom bin 22 are driven by the second bevel gear 18 to drive the two sets of transverse stretching rollers 23 at both ends inside the top bin 2 to rotate, and the two pairs of stretching rollers 23 move transversely and the hot protective film is also pulled by the two pairs of the hot protective film, and the two sets of the hot protective film, the hot protective film is gradually pushed by the two sets of the two pairs of stretching rollers 304, and because first driving motor 302 cooperates first drive assembly 301 to drive squeeze roll 303 pivoted speed and is higher than flattening roller 304, so just can produce the power of vertically dragging to the polypropylene double heat green protection film between squeeze roll 303 and flattening roller 304, realize the vertical drawing to the polypropylene double heat green protection film.
Embodiment 3, as shown in fig. 1 to 8, when winding a produced polypropylene dual-heat green protection film, fixing a head end of the polypropylene dual-heat green protection film on a first group of winding rollers 502 farthest from an installation table 1, then driving a driving gear 506 to rotate through a second transmission assembly 507, and the driving gear 506 drives a corresponding winding roller 502 to rotate through a group of connected driven gears 504, thereby realizing winding of the polypropylene dual-heat green protection film, before the polypropylene dual-heat green protection film is wound by the first group of winding rollers 502, the polypropylene dual-heat green protection film passes through an outer side of the second group of winding rollers 502 at the top, after the first group of winding rollers 502 fully winds the polypropylene dual-heat green protection film, only controlling a servo motor 501 to rotate 45 °, allowing the driven gears 504 and the driving gears 506 on the first group of winding rollers 502 to be no longer meshed, then manually cutting the polypropylene dual-heat green protection film, immediately fixing the head end of the polypropylene dual-heat green protection film to an outer side of the second group of winding rollers 502 after cutting, then controlling a rotary table 503 to rotate 45 °, allowing one end of the second group of polypropylene dual-heat green protection film to be meshed with the driving gears 504, and thus enabling the polypropylene dual-heat green protection film to be switched to the winding rollers 502, and so as to be switched to the polypropylene dual-heat green protection film in the whole winding rollers 502, and so as to be switched to the winding rollers 502, and so as to realize the winding apparatus.
The working principle is as follows: before the device is used, one side of the whole manufacturing device with the discharging bin 10 is moved to the position below an outlet of an extruder, the top of the discharging bin 10 is positioned right below the outlet of the extruder, then the extruder is controlled to discharge the raw material of the molten polypropylene double-heat green protection film into the discharging bin 10, then a control panel 4 controls a second driving motor 13 to drive two groups of extruding rollers 11 to rotate oppositely, the raw material of the molten polypropylene double-heat green protection film is clamped into a flat shape and falls onto a plurality of groups of material conveying rollers 12, the second driving motor 13 can drive the plurality of groups of material conveying rollers 12 to rotate synchronously and in the same direction through the transmission of a first transmission gear 15 and a third transmission assembly 9, so that the raw material of the molten polypropylene double-heat green protection film is conveyed towards the direction close to the mounting frame 505 gradually, meanwhile, two groups of electric hydraulic cylinders 17 are controlled to extend to separate a top bin 2 from a bottom bin 22, then the two pairs of transverse stretching rollers 23 are separated, and the two groups of squeeze rollers 303 and the flattening rollers 304 are separated from each other, at this time, the multiple groups of material conveying rollers 12 automatically convey the molten polypropylene double-heat green protection film raw material to the inside of the bottom bin 22, and when the polypropylene double-heat green protection film raw material passes through the guide rollers 21, the control driving device 19 drives the multiple groups of guide rollers 21 inside the trapezoidal bin 16 to synchronously and synchronously rotate in the same direction, so that the molten polypropylene double-heat green protection film raw material is automatically continuously moved towards the winding device 5 until the head end of the polypropylene double-heat green protection film raw material gradually passes through the bottom group of squeeze rollers 303 and the flattening rollers 304, then an operator fixes the head end of the polypropylene double-heat green protection film on the first group of winding rollers 502 farthest from the mounting table 1, and then controls the two groups of electric hydraulic cylinders 17 to shorten, so that the top bin 2 and the bottom bin 22 are attached again, and the ends of the outer sides of the two pairs of transverse stretching rollers 23 close to the material conveying rollers 12 clamp the two sides of the polypropylene double-heat green protection film raw material;
when the polypropylene dual-heat green protection film is manufactured, the electric heating plate 7 is controlled to stably bake and heat the upper part of the guide roller 21, so that the polypropylene dual-heat green protection film raw material above the guide roller 21 is easier to be stretched, the flat polypropylene dual-heat green protection film is conveyed onto the plurality of groups of guide rollers 21 by the plurality of groups of conveying rollers 12, at this time, the first driving motor 302 is controlled to drive the flattening roller 304 to rotate clockwise, the transverse stretching rollers 23 at the two ends inside the bottom bin 22 rotate oppositely through the transmission of the first conical gear 306 and the second conical gear 24, the two groups of transverse stretching rollers 23 at the bottom drive the two groups of transverse stretching rollers 23 at the two ends inside the top bin 2 to rotate through the transmission of the second transmission gear 18, the top bin 2 and the bottom bin 22 jointly form a cavity, the two pairs of transverse stretching rollers 23 at the two ends in the cavity can also transversely stretch the clamped polypropylene dual-heat green protection film raw material while rotating oppositely, and the winding device 5 pulls the polypropylene double-heat green protection film to move, when the polypropylene double-heat green protection film raw material gradually moves towards the direction close to the winding device 5, the polypropylene double-heat green protection film is transversely stretched by two pairs of transverse stretching rollers 23, then when the polypropylene double-heat green protection film passes through two groups of flattening rollers 304, the annular cutters 307 at the two outer ends of the flattening rollers 304 cut off the redundant parts at the two sides of the polypropylene double-heat green protection film, and the first driving motor 302 cooperates with the first driving component 301 to drive the extrusion roller 303 to rotate at a speed higher than that of the flattening rollers 304, so that the polypropylene double-heat green protection film between the extrusion roller 303 and the flattening rollers 304 is longitudinally pulled, the longitudinal stretching of the polypropylene double-heat green protection film is realized, when the produced polypropylene double-heat green protection film is wound, the head end of the polypropylene double-heat green protection film is fixed on a group of winding rollers 502 which are farthest from an installation platform 1, then a squeezing roller 303 drives a driving gear 506 to rotate through a second transmission assembly 507, the driving gear 506 drives corresponding winding rollers 502 to rotate through a group of driven gears 504 which are connected, and therefore winding of the polypropylene double-heat green protection film is achieved, before the polypropylene double-heat green protection film is wound by the first group of winding rollers 502, the polypropylene double-heat green protection film passes through the outer side of the second group of winding rollers 502 on the top, after the first group of winding rollers 502 are fully wound with the polypropylene double-heat green protection film, the servo motor 501 is controlled to rotate 45 degrees in the anticlockwise direction, the driven gears 504 on the first group of winding rollers 502 are not meshed with the driving gear 506, then the polypropylene double-heat green protection film is manually cut off, the head end of the cut polypropylene double-heat green protection film is immediately fixed to the outer side of the second group of winding rollers 502, then the servo motor 501 is controlled to drive a rotary table 503 to rotate 45 degrees in the anticlockwise direction, the driven gears 504 at one end of the second group of winding rollers 502 are meshed with the driving gear 506, and therefore winding rollers 502 start winding and winding of the second group of the winding rollers 502 to achieve fast switching of the polypropylene double-heat green protection film.
It should be noted that, in this document, relational terms such as first and second, and the like are used solely to distinguish one entity or action from another entity or action without necessarily requiring or implying any actual such relationship or order between such entities or actions. Also, the terms "comprises," "comprising," or any other variation thereof, are intended to cover a non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements does not include only those elements but may include other elements not expressly listed or inherent to such process, method, article, or apparatus.
The electrical components presented in the document are all electrically connected with an external master controller and 220V mains, and the master controller can be a conventional known device controlled by a computer or the like.
Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that changes, modifications, substitutions and alterations can be made in these embodiments without departing from the principles and spirit of the invention, the scope of which is defined in the appended claims and their equivalents.
Claims (1)
1. A preparation process of a biaxially oriented polypropylene dual-heat green protection film is characterized by comprising the following steps:
s1, blending raw materials: the film sequentially comprises an upper surface layer, a last surface layer, a core layer, a next surface layer and a lower surface layer, wherein the core layer is a main extrusion layer, 90-95% of homo-polypropylene and 5-10% of a stiffness increasing agent are selected, the last surface layer is a color master layer, and 100% of homo-green color master batch is selected; 100% of homopolymerized polypropylene is selected as the next surface layer; the upper surface layer and the lower surface layer are heat sealing layers, and 94% -98% of copolymerized polypropylene and 2% -6% of anti-sticking agent are mixed;
s2, extrusion molding: respectively adding the raw materials of the upper surface layer, the core layer, the lower surface layer and the lower surface layer into respective extruders, and co-extruding and compounding to form a casting sheet with the thickness of 2.5-4.0 mm;
s3, stretching and shaping: firstly, transversely preheating the cast sheet formed in the step S2, transversely stretching, finally shaping, longitudinally preheating, longitudinally lifting through a longitudinal lifting structure, shaping, cooling and finally winding;
after the core layer raw material enters the double-screw extruder in the step 2, after redundant air needs to be removed during raw material plasticizing, secondary plasticizing, metering and filtering are carried out, and the temperature of the core layer raw material is set to be 230-250 ℃; extruding and filtering raw materials of each surface layer by a single-screw extruder and a double-screw extruder, setting the temperature of the upper surface layer and the lower surface layer at 220-240 ℃, setting the temperature of the upper surface layer and the lower surface layer at 225-250 ℃, and finally extruding the five layers of raw materials from a die head together through corresponding connecting pipes,
meanwhile, in the step 3, the temperature of the die is set to be 225-235 ℃, the temperature of the chill roll is set to be 25-32 ℃, the temperature of the cooling water pool is 25-38 ℃, the temperature of the preheating zone is 116-130 ℃, the temperature of the stretching roll is 105-112 ℃, the stretching ratio is 4.6-4.85 times, the temperature of the setting roll is 110-130 ℃ in the longitudinal stretching process, the temperature of the preheating zone is 170-176 ℃, the temperature of the stretching zone is 150-156 ℃, the temperature of the setting zone is 155-165 ℃, the temperature of the cooling zone is indoor temperature, and the maximum stretching ratio of the thick sheet is 7.5-8.8 times,
the production equipment for the preparation process of the biaxially oriented polypropylene dual-thermal green protection film comprises an installation table (1), and is characterized in that: the middle position of the top of the mounting table (1) is provided with a bottom bin (22), the middle positions of two ends inside the bottom bin (22) are symmetrically provided with electric hydraulic cylinders (17), the output ends of the electric hydraulic cylinders (17) are jointly provided with a top bin (2), two ends inside the top bin (2) and the bottom bin (22) are symmetrically provided with transverse stretching rollers (23), the two ends of the transverse stretching rollers (23) are symmetrically provided with universal joints (14), two ends of two sides inside the top bin (2) and the bottom bin (22) are symmetrically provided with rotating shafts (20), eight groups of rotating shafts (20) are respectively and fixedly connected with an adjacent group of universal joints (14), the two ends of the rotating shafts (20) are four groups, one end of the outer side of each rotating shaft (20) is provided with a second transmission gear (18), the outer side of the two groups of rotating shafts (20) close to one end of the second transmission gear (18) is symmetrically provided with a second conical gear (24), the middle position of the top bin (2) is provided with an electric heating plate (7), one ends of the top bin (2) and one end of the middle position of one side of one transmission gear (18) close to the second transmission gear (18) is provided with a vertical stretching assembly (3), and one end of the middle position of the mounting table (12) is provided with a third transmission roller (12) and a material conveying roller (12) is arranged on one side of the common roller (12), the automatic feeding device is characterized in that a protection bin (8) is installed on one side, close to a feeding roller (12), of the top of the mounting table (1), the feeding roller (12) is located inside the protection bin (8), a trapezoidal bin (16) is arranged at the middle position inside a bottom bin (22), guide rollers (21) are evenly arranged inside the trapezoidal bin (16), a driving device (19) in transmission connection with the guide rollers (21) is arranged at the bottom of the mounting table (1), the driving device (19) comprises a third driving motor, a second chain wheel and a second chain, the third driving motor is installed at the middle position of the bottom of the mounting table (1), the second chain wheel is installed at the middle position outside the third driving motor and the guide rollers (21), the second chain wheel is arranged outside the second chain wheel, a winding device (5) is arranged on one side, far away from the feeding roller (12), of the top of the mounting table (1), one end of a frame body of the winding device (5) is provided with a control panel (4), and the control panel (4) is electrically connected with an electric heating cylinder (17) and an electric heating cylinder (7) through a wire;
the longitudinal stretching assembly (3) comprises a first transmission assembly (301), a first driving motor (302), a squeezing roller (303), a flattening roller (304), a U-shaped frame (305), a first bevel gear (306) and an annular cutter (307), u-shaped frames (305) are symmetrically arranged on one sides of the top bin (2) and the bottom bin (22) far away from the material conveying roller (12), and flattening rollers (304) are symmetrically arranged at the middle positions of the inner sides of the two groups of U-shaped frames (305), an extrusion roller (303) is arranged on one side of the inside of the U-shaped frame (305) far away from the top bin (2), annular cutters (307) are symmetrically arranged at two ends of the outer side of the group of flattening rollers (304) at the bottom, and the two ends of the outer side of the set of flattening rollers (304) are symmetrically provided with first bevel gears (306) which are meshed with the second bevel gears (24), one end of the U-shaped frame (305) at the bottom is provided with a first driving motor (302) which is in transmission connection with the flattening rollers (304), the output end of the first driving motor (302) is provided with a first transmission assembly (301) in transmission connection with one end of a group of squeezing rollers (303), one end of the group of squeezing rollers (303) far away from the first driving motor (302) is in transmission connection with a universal joint (14) through an electric heating plate (7), the control panel (4) is electrically connected with the first driving motor (302) through a lead;
the winding device (5) comprises a servo motor (501), winding rollers (502), a rotary table (503), driven gears (504), an installation frame (505), driving gears (506) and second transmission assemblies (507), wherein the installation frame (505) is installed on one side, away from a material conveying roller (12), of the top of the installation table (1), the rotary table (503) is symmetrically arranged at the middle position of two sides in the installation frame (505), four groups of winding rollers (502) are evenly arranged at positions, which are not in the center of a circle, of the inner sides of the two groups of rotary tables (503), the servo motor (501) in transmission connection with the adjacent group of rotary table (503) is installed at one end of one group of the mounting frame (505), the four groups of winding rollers (502) are all installed at one ends, away from the servo motor (501), of the four groups of the winding rollers are all installed with the driven gears (504) which are meshed with universal joints (14), the driving gears (506) which are matched with the driven gears (504) are arranged at positions, which are not in the center of the inner sides of the center of the installation frame (505), the outer ends of rotating shafts of the driving gears (506) are provided with the second transmission assemblies (507), and the control panel (4) are electrically connected with the servo motor (501) through wires;
a discharge bin (10) is installed on one side, close to a material conveying roller (12), of the top of the mounting table (1), the discharge bin (10) is located above the material conveying roller (12), material extruding rollers (11) which are matched with each other are symmetrically arranged on two sides of the interior of the discharge bin (10), the same ends of two groups of material extruding rollers (11) penetrate through the discharge bin (10) and are provided with third transmission gears (6) which are meshed with each other, a second driving motor (13) in transmission connection with one group of material extruding rollers (11) is installed at one end, far away from the third transmission gears (6), of the discharge bin (10), and first transmission gears (15) which are meshed with each other are installed at the output end of the second driving motor (13) and the same end of one group of material conveying rollers (12);
the first transmission assembly (301) comprises a first belt pulley and a first transmission belt, the first belt pulley is mounted at one end of the extrusion roller (303) and the output end of the first driving motor (302), and the first transmission belt is arranged on the outer sides of the two groups of first belt pulleys;
the second transmission assembly (507) comprises a second belt pulley and a second transmission belt, the second belt pulley is mounted at one end of one group of squeezing rollers (303) and one end of the rotating shaft of the driving gear (506), and the second transmission belt is jointly arranged at the outer sides of the two groups of second belt pulleys;
the third transmission assembly (9) comprises a first chain wheel and a first chain, the same ends of the twelve groups of conveying rollers (12) are provided with the chain wheels, and the outer sides of the twelve groups of chain wheels are provided with the chains together.
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| CN116100794B (en) * | 2023-04-04 | 2023-06-06 | 青州富翔塑业有限公司 | Biaxially oriented polyester film forming device |
| CN116353038B (en) * | 2023-06-01 | 2023-12-05 | 群力塑胶有限公司 | Preparation method of biaxially-oriented BOPP film |
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| CN109532173B (en) * | 2018-12-17 | 2019-08-13 | 广东德冠包装材料有限公司 | A kind of moldable bidirectional stretching polypropylene film and its preparation method and application |
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| CN113752510B (en) * | 2021-09-17 | 2022-09-13 | 连云港市金田高新材料有限公司 | Production process and intelligent production equipment of PLA degradable functional film |
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| BE788153A (en) * | 1971-08-31 | 1972-12-18 | Horsens Plasticvarefab As | METHOD OF MANUFACTURING BIAXIALLY STRETCHED CONTRACTABLE SHEETS AND ASSOCIATED APPARATUS |
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