CN115923112A - BOPP film is with tensile equipment - Google Patents

Abstract

The invention relates to the technical field of BOPP film stretching, in particular to stretching equipment for a BOPP film. According to the invention, the thick sheet processed by the calendar is flattened and conveyed by the conveying unit, so that the thick sheet smoothly enters the stretching unit, the thick sheet is subjected to synchronous bidirectional stretching treatment by the stretching unit, the stretching point of the thick sheet is increased by adding an additional contact point before stretching, so that the edge deformation points of the stretched film are increased, the width of the edge deformation of the film is reduced, the width of the edge of the film to be cut is reduced, the processing utilization rate of equipment is improved, the film is rolled by the rolling unit, and the rolled film can be quickly separated from the equipment, so that the time for stopping the equipment is shortened, and the processing efficiency of the equipment is improved.

Description

BOPP film is with tensile equipment

Technical Field

The invention relates to the technical field of BOPP film stretching, in particular to stretching equipment for a BOPP film.

Background

The BOPP film is an excellent transparent flexible packaging material, and is manufactured by co-extruding polypropylene particles to form a sheet and then stretching the sheet in two directions of longitudinal and transverse directions, the BOPP film has the advantages of light weight, no toxicity, no odor, moisture resistance, wide application range, stable performance, high production efficiency, energy conservation and the like, the total thickness is reduced, the main processing mode of the BOPP film is a flat film method, and the flat film method is divided into a synchronous biaxial stretching method and a step-by-step biaxial stretching method, and the BOPP film is mainly processed by aiming at the synchronous biaxial stretching method.

The synchronous biaxial stretching method is to send the thick plate that the casting machine processed into stretching equipment department and carry out the stretching of two directions of moving about freely and quickly simultaneously, the tensile department edge deformation of film after the stretching, can't use, consequently, need cut the processing to it before the rolling, because when synchronous biaxial stretching farad stretched the film, need carry out biaxial stretching, but because of the tensile contact point of film is less, lead to film edge deflection big, the size that causes the follow-up cutting waste material of film is great, the rate of film is unrestrained and manufacturing cost is high, and after the film rolling is accomplished, need take off it, then overlap again and establish the rolling part, lead to equipment need to stop work for a period, make the machining efficiency of equipment reduce.

Disclosure of Invention

In order to solve the technical problem, the invention provides stretching equipment for a BOPP film.

The utility model provides a BOPP film is with tensile equipment, includes conveying unit, tensile unit and rolling unit, the last fixed mounting of conveying unit has tensile unit, and tensile unit lower extreme fixed mounting has the rolling unit.

The stretching unit comprises an oven, the oven is fixedly mounted on the conveying unit, electric push rods are symmetrically and fixedly mounted in the oven front and back, a left clamping frame is fixedly mounted at the tail end of each electric push rod, a right clamping frame is fixedly mounted at the right end of the left clamping frame, and a feeding frame is rotatably connected to the lower side of the oven.

The winding unit comprises a fixed vertical plate, a fixed vertical plate is fixedly mounted at the lower end of the oven, the front end of the fixed vertical plate is rotatably connected with a winding roller, the rear end of the fixed vertical plate is fixedly mounted with a motor I through a motor base, an output shaft of the motor is fixedly connected with the winding roller through a coupler, the front end of the fixed vertical plate is rotatably connected with a bidirectional threaded rod, threaded grooves with opposite rotation directions are formed in the front side and the rear side of the bidirectional threaded rod, cutting knives are connected in a threaded connection mode in the front-back symmetry of the bidirectional threaded rod, and guide rods penetrating through the cutting knives are fixedly mounted at the front end of the fixed vertical plate.

The first preferred technical scheme is as follows: the conveying unit comprises a workbench, the left side and the right side of the front end of the workbench are symmetrically and rotatably connected with conveying rollers, the first gears are fixedly mounted at the rear ends of the conveying rollers, the first gears are meshed with each other, the second motor is fixedly mounted at the rear end of the workbench, the second output shaft of the motor is fixedly connected with the first left gears through a coupler, the threaded columns are rotatably connected to the middle of the conveying rollers, round platform blocks with small diameter ends horizontally backwards are connected to the threaded columns in a threaded connection mode, sliding fit grooves are evenly formed in the outer ends of the conveying rollers, the extending columns are connected to the sliding fit grooves in a sliding fit mode, the extending columns are connected to the inclined planes of the round platform blocks in a sliding fit mode, the tail ends of the extending columns are fixedly mounted with positioning supports, and extrusion columns are rotatably connected to the positioning supports.

The preferred technical scheme is as follows: the oven includes the rectangular plate, and the rectangular through-hole has been seted up at the rectangular plate middle part, and left clamp frame upper end fixed mounting has the guide block, and rectangular plate inner wall fixed mounting has the net pipeline, and even fixed mounting has the toper gas outlet that runs through the rectangular plate on the net pipeline, and oven right-hand member fixed mounting has the air pump, and air pump right-hand member fixed mounting has screw thread shape intake pipe, and screw thread shape intake pipe air inlet fixed mounting has the filter, and screw thread shape intake pipe outer fixed mounting has the insulation cover, and fixed mounting has the heating wire in the insulation cover.

The preferred technical scheme is three: the left side presss from both sides tight frame and includes the control panel, the terminal equal fixed mounting of electric putter has the control panel, the control panel looks remote site is connected with the left side in order that upper and lower sliding fit's mode is even and presss from both sides tight post and control panel fixed connection, the left side at middle part presss from both sides tight post middle part and all articulates jointly has the V-arrangement hinge bar, the V-arrangement hinge bar comprises two poles bodies of rotating the connection with the axle center, V-arrangement hinge bar middle part is close to control panel one end and rotates and is connected with the connecting rod, the connecting rod is connected with the rectangular connecting plate with sliding fit's mode jointly, control panel middle part fixed mounting has electric telescopic handle, electric telescopic handle end and rectangular connecting plate fixed connection, the piece is inhaled to left side clamp post right-hand member fixed mounting, common fixedly connected with scalable support column one between the adjacent left side presss from both sides tight post, scalable support column right-hand member and magnetism are inhaled the piece right-hand and are aligned.

The preferable technical scheme is four: the right side presss from both sides tight frame includes die clamping cylinder, control panel right-hand member fixed mounting has die clamping cylinder, die clamping cylinder right-hand member fixed mounting has the inverted Z shaped plate, inverted Z shaped plate looks remote site all is connected with right side clamp post with sliding fit's mode, right side clamp post evenly arranges, the right side at middle part presss from both sides tight post and inverted Z shaped plate fixed connection, right side clamp post left end fixed mounting has the electromagnetic plate, the fillet has all been seted up with magnetism suction block outer end to the electromagnetic plate, the common fixedly connected with scalable support column two between the tight post of right side clamp, two left ends of scalable support column align with the electromagnetic plate left end.

The preferred technical scheme is five: the feeding frame comprises a feeding column I, the lower side inside the oven is rotatably connected with the feeding column I, the right side inside the oven and located on the feeding column I is rotatably connected with a feeding column II, a gear II is fixedly mounted at the rear ends of the feeding column I and the feeding column II and meshed with the gear II, a chain wheel I is fixedly mounted at the rear end of the gear II on the right side, a chain wheel II is fixedly mounted at the rear side of the winding roller, and the chain wheel I and the chain wheel II are in transmission connection through a toothed chain belt.

The preferred technical scheme is six: the winding roller is sleeved with an I-shaped cylinder, the surface of the I-shaped cylinder is pasted with a double-sided adhesive tape, the front side of the winding roller is connected with a screwing screw in a threaded connection mode, the screwing screw is located on the left side of the central axis of the winding roller, the front end of the screwing screw is fixedly provided with a pressing plate, and the length of the pressing plate is smaller than the maximum distance between the central axis of the screwing screw and the outer edge of the winding roller.

The preferable technical scheme is seven: the cutting knife comprises an L-shaped bent knife, the front and back of the bidirectional threaded rod are symmetrically connected with the L-shaped bent knife in a threaded connection mode, and the upper end of the L-shaped bent knife is provided with a chamfer guide chamfer.

The preferred technical scheme is eight: scalable support column one includes square post one, and the equal fixedly connected with square post one of looks remote site of the tight post of adjacent left clamp, square post one middle part outer end are connected with square framed lamella one with sliding fit's mode, and square framed lamella middle part is connected with square movable block one with sliding fit's mode, between the square movable block one, equal fixed mounting has the cylinder spring between square movable block one and the square post one, and a square framed lamella right-hand member fixed mounting has the extrusion hemisphere, and extrusion hemisphere right-hand member flushes with magnetism piece right-hand member.

The invention has the following beneficial effects: 1. according to the stretching equipment for the BOPP film, the thick sheet processed by the calendar is flattened and conveyed by the conveying unit and smoothly enters the stretching unit, the thick sheet is subjected to synchronous bidirectional stretching treatment by the stretching unit, the stretching point of the thick sheet is increased by adding an additional contact point before stretching, so that the edge deformation point of the stretched film is increased, the width of the edge deformation of the film is reduced, the width of the edge of the film to be cut is reduced, the processing utilization rate of the equipment is improved, the film is rolled by the rolling unit, and the rolled film can be quickly separated from the equipment, so that the time for stopping the equipment is shortened, and the processing efficiency of the equipment is improved.

2. The conveying unit provided by the invention changes the position of the circular table block by rotating the threaded column, so that the extending length of the extending column is changed, the extruding column is tightly attached to the thick sheet, the purpose of extruding and conveying the thick sheet is achieved, the thick sheet is ensured to be in a flat state when entering the stretching unit, and the difficulty of stretching the thick sheet by the stretching unit is reduced.

3. The stretching unit provided by the invention prevents impurities contained in the gas from polluting the surface of the film and affecting the quality of the film through the filter plate, and prevents heat generated by the electric heating wire from contacting the outside through the heat-insulating sleeve, thereby causing heat loss and increasing the processing cost.

4. According to the stretching unit provided by the invention, the point division positioning is carried out on the thick sheet between the pair of adjacent left clamping columns through the telescopic supporting columns, so that the number of points for clamping and positioning the thick sheet is increased under the condition that the number of the left clamping columns is not increased, the deformation quantity between deformation points of the stretched thick sheet is reduced, the width of the edge of the thin film to be cut is reduced, the quantity of waste materials generated in the thin film processing process is reduced, and the utilization rate of the thin film processed by the device is improved.

5. According to the winding unit provided by the invention, the I-shaped cylinder and the winding roller are relatively fixed by rotating the screwing screw rod to control the pressing plate, so that the I-shaped cylinder is positioned or quickly disassembled, the thick plate is extruded and positioned by the extrusion hemisphere, the square frame plate is uniformly distributed between the left clamping columns by the cylindrical spring, and the thick plate between the left clamping columns is uniformly stressed.

Drawings

Fig. 1 is a schematic front perspective view of the present invention.

Fig. 2 is a schematic structural view of a front plane of the present invention.

Fig. 3 isbase:Sub>A sectional view taken along linebase:Sub>A-base:Sub>A of fig. 2 according to the present invention.

Fig. 4 is a schematic plan view of the present invention in partial cross-section.

Fig. 5 is a sectional view taken along line B-B of fig. 4 in accordance with the present invention.

Fig. 6 is a partial enlarged view of the present invention at N of fig. 4.

Fig. 7 is a partial enlarged view of the present invention at M of fig. 5.

Fig. 8 is a schematic rear view of the present invention.

Fig. 9 is a schematic front perspective view of the left and right clamping frames of the present invention.

Fig. 10 is a partial enlarged view at E of fig. 5 of the present invention.

Fig. 11 is a partial enlarged view of the present invention at F of fig. 9.

Fig. 12 is a partial enlarged view of the present invention at G of fig. 4.

Fig. 13 is a partial enlarged view of the invention at H of fig. 4.

FIG. 14 is a diagram showing a comparison of the state of the films before and after the retractable stand bar I and the retractable stand bar II are used.

In the figure: 1. a conveying unit; 11. a work table; 12. a conveying roller; 13. a first gear; 14. a second motor; 15. a threaded post; 16. a round table block; 17. a sliding fit groove; 18. extending the column; 19. positioning the bracket; 20. extruding the column; 2. a stretching unit; 21. baking oven; 211. a rectangular plate; 212. a rectangular through hole; 213. a guide block; 214. a grid pipe; 215. a conical air outlet; 216. an air pump; 217. a threaded air inlet pipe; 218. a filter plate; 219. a thermal insulation sleeve; 220. an electric heating wire; 22. an electric push rod; 23. a left clamping frame; 231. a control panel; 232. a left clamping post; 233. a V-shaped hinge rod; 234. a connecting rod; 235. a rectangular connecting plate; 236. an electric telescopic rod; 237. a magnetic suction block; 238. a first telescopic supporting column; 2381. a first square column; 2382. a first square frame plate; 2383. a first square moving block; 2384. a cylindrical spring; 2385. extruding a hemisphere; 24. a right clamping frame; 241. a clamping cylinder; 242. an inverted Z-shaped plate; 243. a right clamping post; 244. an electromagnetic plate; 245. a second telescopic supporting column; 25. a feeding frame; 251. a first feeding column; 252. a feeding column II; 253. a second gear; 254. a chain wheel I; 255. a second chain wheel; 256. a toothed chain belt; 3. a winding unit; 31. fixing the vertical plate; 32. a wind-up roll; 321. an I-shaped cylinder; 322. double-sided adhesive tapes; 323. screwing the screw; 324. pressing the plate tightly; 33. a first motor; 34. a bidirectional threaded rod; 35. a cutting knife; 351. an L-shaped curved knife; 352. material guiding chamfering; 36. a guide rod.

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, the stretching device for the BOPP film comprises a conveying unit 1, a stretching unit 2 and a winding unit 3, wherein the stretching unit 2 is fixedly mounted on the conveying unit 1, and the winding unit 3 is fixedly mounted at the lower end of the stretching unit 2.

Referring to fig. 1 and 9, the stretching unit 2 includes an oven 21, the oven 21 is fixedly mounted on the conveying unit 1, electric push rods 22 are symmetrically and fixedly mounted in the oven 21 front and back, a left clamping frame 23 is fixedly mounted at the tail end of each electric push rod 22, a right clamping frame 24 is fixedly mounted at the right end of each left clamping frame 23, and a feeding frame 25 is rotatably connected to the lower side of the oven 21; firstly, the thick sheet from the casting machine is conveyed into an oven 21 through a conveying unit 1, the thick sheet is heated through the oven 21 to reach the stretching temperature, the thick sheet is clamped through a left clamping frame 23 and a right clamping frame 24 at the moment, the thick sheet is stretched transversely and longitudinally, and the stretched film is flattened and conveyed through a feeding frame 25.

Continuing to refer to fig. 1, 4, 5 and 9, the winding unit 3 includes a fixed vertical plate 31, a fixed vertical plate 31 is fixedly installed at the lower end of the oven 21, the front end of the fixed vertical plate 31 is rotatably connected with a winding roller 32, a first motor 33 is fixedly installed at the rear end of the fixed vertical plate 31 through a motor base, an output shaft of the first motor 33 is fixedly connected with the winding roller 32 through a coupler, a bidirectional threaded rod 34 is rotatably connected at the front end of the fixed vertical plate 31, threaded grooves with opposite rotation directions are formed in the front side and the rear side of the bidirectional threaded rod 34, the bidirectional threaded rod 34 is symmetrically connected with a cutting knife 35 in a threaded connection mode, and a guide rod 36 penetrating through the cutting knife 35 is fixedly installed at the front end of the fixed vertical plate 31; the film after flattening is carried to wind-up roll 32 and is fixed a position on, according to the final stretching position of left clamping frame 23 and right clamping frame 24, adjust the distance between the cutting knife 35, the distance between the left clamping frame 23 when making the distance between the cutting knife 35 and final stretching is the same, the distance between the right clamping frame 24 is equal with the distance between the left clamping frame 23 all the time, edge after the tensile deformation of film is cut through cutting knife 35, drive wind-up roll 32 through a motor 33 and rotate, the film after cutting is handled carries out the rolling.

Referring to fig. 4, 5, 8 and 12, the conveying unit 1 includes a workbench 11, conveying rollers 12 are symmetrically and rotatably connected to the left and right sides of the front end of the workbench 11, first gears 13 are fixedly mounted at the rear ends of the conveying rollers 12, the first gears 13 are meshed with each other, a second motor 14 is fixedly mounted at the rear end of the workbench 11 through a motor base, an output shaft of the second motor 14 is fixedly connected with the first left gear 13 through a coupler, a threaded column 15 is rotatably connected to the middle of the conveying roller 12, a circular table block 16 with a small-diameter end horizontally turned back is connected to the threaded column 15 in a threaded connection manner, sliding fit grooves 17 are uniformly formed in the outer end of the conveying roller 12, extending columns 18 are connected to the sliding fit grooves 17 in a sliding fit manner, the extending columns 18 are connected to inclined surfaces of the circular table block 16 in a sliding fit manner, positioning supports 19 are fixedly mounted at the tail ends of the extending columns 18, and extrusion columns 20 are rotatably connected to the positioning supports 19; the first gear 13 on the left side is driven to rotate through the second motor 14, the conveying rollers 12 on the left side and the right side rotate in opposite directions under the matching of the first gear 13 on the right side, the conveying speed of the thick plate is controlled according to the rotating speed of the conveying rollers 12, the circular table block 16 horizontally moves backwards through rotating the threaded column 15, the extending column 18 moves towards the outside of the sliding matching groove 17 along the radial direction of the conveying rollers 12 under the action of the inclined plane of the circular table block 16, the extending length of the extending column 18 is increased, then the distance between the extrusion column 20 and the axis of the conveying rollers 12 is increased, and the extrusion column 20 can adapt to the thickness change of the thick plate and is tightly attached to the thick plate.

Referring to fig. 4 and 13, the oven 21 includes a rectangular plate 211, a rectangular through hole 212 is formed in the middle of the rectangular plate 211, a guide block 213 is fixedly mounted at the upper end of the left clamping frame 23, a grid pipeline 214 is fixedly mounted on the inner wall of the rectangular plate 211, tapered air outlets 215 penetrating through the rectangular plate 211 are uniformly and fixedly mounted on the grid pipeline 214, an air pump 216 is fixedly mounted at the right end of the oven 21, a threaded air inlet pipe 217 is fixedly mounted at the right end of the air pump 216, a filter plate 218 is fixedly mounted at an air inlet of the threaded air inlet pipe 217, a heat-insulating sleeve 219 is fixedly mounted at the outer end of the threaded air inlet pipe 217, and heating wires 220 are fixedly mounted in the heat-insulating sleeve 219; the gas heated by the heating wire 220 is introduced into the grid pipeline 214 through the air pump 216 and is finally discharged through the conical air outlet 215, the distance for gas heating is increased through the threaded air inlet pipe 217, impurities contained in the gas are prevented from polluting the surface of the film through the filter plate 218, heat generated by the heating wire 220 is prevented from contacting the outside through the heat-insulating sleeve 219, so that the heat is lost, and the thick sheet smoothly enters the space between the left clamping frame 23 and the right clamping frame 24 through the guide block 213.

Referring to fig. 4, 5, 9, 10 and 11, the left clamping frame 23 includes a control plate 231, the end of the electric push rod 22 is fixedly provided with the control plate 231, the opposite end of the control plate 231 is uniformly connected with a left clamping column 232 in a manner of sliding fit up and down, the middle part of the left clamping column 232 at the middle part is fixedly connected with the control plate 231, the middle parts of the adjacent left clamping columns 232 are hinged with a V-shaped hinge rod 233, the V-shaped hinge rod 233 is composed of two rods which are coaxially and rotatably connected, the middle part of the V-shaped hinge rod 233 close to the end of the control plate 231 is rotatably connected with a connecting rod 234, the connecting rod 234 is connected with a rectangular connecting plate 235 in a manner of sliding fit, the middle part of the control plate 231 is fixedly provided with an electric telescopic rod 236, the end of the electric telescopic rod 236 is fixedly connected with the rectangular connecting plate 235, the right end of the left clamping column 232 is fixedly provided with a magnetic absorption block 237, a telescopic support 238 is fixedly connected between the adjacent left clamping columns 232, and a right end of the telescopic support 238 is aligned with the magnetic absorption block 237; after the left clamping frame 23 and the right clamping frame 24 clamp the thick sheet, the control plate 231 is driven by the electric push rod 22 to move back and forth, the thick sheet is transversely stretched, meanwhile, the rectangular connecting plate 235 and the connecting rod 234 are driven by the electric telescopic rod 236 to move towards each other, so that the opening angle of the V-shaped hinge rod 233 is increased, the distance between the left clamping columns 232 is increased, the thick sheet is longitudinally stretched, and finally, the purpose of synchronously stretching the thick sheet in the transverse direction and the longitudinal direction is achieved.

Referring to fig. 4, 5, 6, 9 and 11, the right clamping frame 24 includes a clamping cylinder 241, the right end of the control board 231 is fixedly provided with the clamping cylinder 241, the right end of the clamping cylinder 241 is fixedly provided with an inverted Z-shaped plate 242, opposite ends of the inverted Z-shaped plate 242 are connected with right clamping columns 243 in a sliding fit manner, the right clamping columns 243 are uniformly arranged, the right clamping columns 243 in the middle are fixedly connected with the inverted Z-shaped plate 242, the left end of the right clamping columns 243 is fixedly provided with an electromagnetic plate 244, outer ends of the electromagnetic plate 244 and the magnetic attraction block 237 are both provided with round corners, a telescopic supporting column two 245 is fixedly connected between the right clamping columns 243, and the left end of the telescopic supporting column two 245 is aligned with the left end of the electromagnetic plate 244; the inverted Z-shaped plate 242 is driven by the clamping cylinder 241 to move towards the control plate 231, the electromagnetic plate 244 on the right clamping column 243 is made to be tightly attached to the thick plate, the electromagnetic plate 244 is powered on at the moment, the magnetic attraction block 237 and the electromagnetic plate 244 attract each other at intervals of the thick plate, when the distance between the left clamping columns 232 is increased, under the condition that the magnetic attraction block 237 and the electromagnetic plate 244 attract each other, the left clamping columns 232 can drive the right clamping columns 243 to synchronously move, the telescopic support columns two 245 and the telescopic support columns one 238 are matched to synchronously clamp the thick plate, and the thick plate is subjected to multi-point clamping positioning through the operation.

Referring to fig. 2, 3 and 8, the feeding frame 25 includes a first feeding column 251, the lower side inside the oven 21 is rotatably connected with the first feeding column 251, the right side inside the oven 21 and located on the first feeding column 251 is rotatably connected with a second feeding column 252, the rear ends of the first feeding column 251 and the second feeding column 252 are both fixedly provided with a second gear 253, the second gear 253 is engaged with each other, the rear end of the second gear 253 on the right side is fixedly provided with a first sprocket 254, the rear side of the take-up roller 32 is fixedly provided with a second sprocket 255, and the first sprocket 254 and the second sprocket 255 are in transmission connection through a toothed chain belt 256; through the cooperation of the first chain wheel 254, the second chain wheel 255 and the chain belt 256, the purpose of driving the second gear 253 to rotate through the first motor 33 is achieved, so that the first feeding column 251 and the second feeding column 252 are driven to rotate oppositely, the film is flattened and conveyed, and the conveying speed of the film is controlled.

Referring to fig. 3-5 and fig. 9, an i-shaped cylinder 321 is sleeved on the wind-up roll 32, a double-sided adhesive tape 322 is pasted on the surface of the i-shaped cylinder 321, a screwing screw 323 is connected to the front side of the wind-up roll 32 in a threaded connection manner, the screwing screw 323 is located on the left side of the central axis of the wind-up roll 32, a pressure plate 324 is fixedly mounted at the front end of the screwing screw 323, and the length of the pressure plate 324 is smaller than the maximum distance between the central axis of the screwing screw 323 and the outer edge of the wind-up roll 32; the film is wound through the I-shaped cylinder 321, the film is positioned through the double-sided adhesive tape 322, the pressing plate 324 in the initial state is kept horizontal and is integrally positioned on the left side of the central axis of the winding roller 32, the I-shaped cylinder 321 is blocked by the pressing plate 324 at the moment, the I-shaped cylinder 321 cannot be taken down from the winding roller 32, after the I-shaped cylinder 321 finishes winding the film, the pressing plate 324 is integrally positioned in the range of the side end face of the winding roller 32 by clockwise rotating the screwing screw 323, the I-shaped cylinder 321 is not blocked by the pressing plate 324 at the moment, and the I-shaped cylinder 321 can be taken down smoothly.

Referring to fig. 4, the cutting knife 35 includes an L-shaped curved knife 351, the bidirectional threaded rod 34 is connected with the L-shaped curved knife 351 in a front-back symmetrical manner in a threaded connection manner, and a guide chamfer 352 is formed at the upper end of the L-shaped curved knife 351; the film edge is cut by the L-shaped bent knife 351, and the cut film edge smoothly drops through the material guide chamfer 352, so that waste materials are prevented from being accumulated on the L-shaped bent knife 351 and affecting the cutting of the L-shaped bent knife 351.

Referring to fig. 6 and 7, the first telescopic supporting column 238 comprises a first square column 2381, opposite ends of adjacent left clamping columns 232 are fixedly connected with the first square column 2381, the outer ends of the middle parts of the first square columns 2381 are connected with a first square frame plate 2382 in a sliding fit manner, the middle parts of the first square frame plates 2382 are connected with first square moving blocks 2383 in a sliding fit manner, cylindrical springs 2384 are fixedly arranged between the first square moving blocks 2383 and between the first square column 2381 and the first square moving blocks 2383, an extruding hemisphere 2385 is fixedly arranged at the right end of the first square frame plates 2382, and the right end of the extruding hemisphere 2385 is flush with the right end of the magnetic sucking block 237; extrude the location through extrusion hemisphere 2385 to the slab, guarantee square framed panel 2382 evenly distributed through cylindrical spring 2384 between the left clamp post 232, make the slab atress between the left clamp post 232 even.

During specific work, firstly, a thick sheet from a casting machine is conveyed into the oven 21 through the conveying unit 1, the thick sheet is heated through the oven 21 to reach a stretching temperature, at the moment, the thick sheet is clamped through the left clamping frame 23 and the right clamping frame 24, the thick sheet is stretched transversely and longitudinally, the stretched film is flattened and conveyed through the feeding frame 25, the flattened film is conveyed to the winding roller 32 and is positioned, the distance between the cutting knives 35 is adjusted according to the final stretching positions of the left clamping frame 23 and the right clamping frame 24, the distance between the cutting knives 35 is the same as the distance between the left clamping frame 23 and the right clamping frame 24 during final stretching, the edges of the film subjected to stretching deformation are cut through the cutting knives 35, the winding roller 32 is driven to rotate through the first motor 33, and the cut film is wound.

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 (9)

1. The utility model provides a BOPP film is with tensile equipment, includes conveying element (1), tensile unit (2) and rolling unit (3), its characterized in that: a stretching unit (2) is fixedly arranged on the conveying unit (1), and a winding unit (3) is fixedly arranged at the lower end of the stretching unit (2); wherein:

the stretching unit (2) comprises an oven (21), the oven (21) is fixedly installed on the conveying unit (1), electric push rods (22) are symmetrically and fixedly installed in the oven (21) in a front-back mode, a left clamping frame (23) is fixedly installed at the tail ends of the electric push rods (22), a right clamping frame (24) is fixedly installed at the right end of the left clamping frame (23), and a feeding frame (25) is rotatably connected to the lower side of the oven (21);

winding unit (3) are including fixed riser (31), oven (21) lower extreme fixed mounting has fixed riser (31), fixed riser (31) front end rotates and is connected with wind-up roll (32), fixed riser (31) rear end has motor (33) through motor cabinet fixed mounting, motor (33) output shaft passes through shaft coupling and wind-up roll (32) fixed connection, fixed riser (31) front end rotates and is connected with two-way threaded rod (34), the opposite thread groove of turning to has been seted up to both sides around two-way threaded rod (34), two-way threaded rod (34) longitudinal symmetry is connected with cutting knife (35) with threaded connection's mode, fixed riser (31) front end fixed mounting has guide bar (36) that runs through cutting knife (35).

2. The stretching apparatus for BOPP film according to claim 1, wherein: conveying unit (1) includes workstation (11), workstation (11) front end left and right sides symmetry rotation is connected with conveying roller (12), the equal fixed mounting in conveying roller (12) rear end has gear (13), gear (13) mesh mutually, workstation (11) rear end passes through motor cabinet fixed mounting has motor two (14), motor two (14) output shaft passes through shaft coupling and left gear (13) fixed connection, conveying roller (12) middle part rotation is connected with screw post (15), be connected with round platform piece (16) behind the minor diameter end level with threaded connection's mode on screw post (15), sliding fit groove (17) have evenly been seted up to conveying roller (12) outer end, be connected with in sliding fit's mode in sliding fit groove (17) and stretch out post (18), be connected with sliding fit's mode between the inclined plane that stretches out post (18) and round platform piece (16), it has locating support (19) to stretch out post (18) terminal fixed mounting, rotate on locating support (19) and be connected with extrusion post (20).

3. The stretching apparatus for BOPP film according to claim 1, wherein: oven (21) includes rectangular plate (211), rectangle through-hole (212) have been seted up at rectangular plate (211) middle part, left side clamp frame (23) upper end fixed mounting has guide block (213), rectangular plate (211) inner wall fixed mounting has net pipeline (214), even fixed mounting has toper gas outlet (215) that runs through rectangular plate (211) on net pipeline (214), oven (21) right-hand member fixed mounting has air pump (216), air pump (216) right-hand member fixed mounting has screw thread shape intake pipe (217), screw thread shape intake pipe (217) air inlet fixed mounting has filter (218), screw thread shape intake pipe (217) outer end fixed mounting has insulation cover (219), insulation cover (219) internal fixed mounting has heating wire (220).

4. The stretching apparatus for BOPP film according to claim 1, wherein: the left clamping frame (23) comprises a control plate (231), the tail end of an electric push rod (22) is fixedly provided with the control plate (231), the opposite end of the control plate (231) is uniformly connected with a left clamping column (232) in an upper-lower sliding fit mode, the middle part of the left clamping column (232) is fixedly connected with the control plate (231), the middle parts of the adjacent left clamping columns (232) are jointly hinged with a V-shaped hinge rod (233), the V-shaped hinge rod (233) consists of two rods which are rotatably connected with the same axle center, the middle part of the V-shaped hinge rod (233) is close to one end of the control plate (231) and is rotatably connected with a connecting rod (234), the connecting rod (234) is jointly connected with a rectangular connecting plate (235) in a sliding fit mode, the middle part of the control plate (231) is fixedly provided with an electric telescopic rod (236), the tail end of the electric telescopic rod (236) is fixedly connected with the rectangular connecting plate (235), the left clamping column (232) is fixedly provided with a magnetic absorption block (237), the right end of the adjacent left clamping columns (232) is fixedly connected with a telescopic support column (238), and the right end of the telescopic support column (238) is aligned with the magnetic absorption block (237).

5. The stretching apparatus for BOPP film according to claim 4, wherein: right side clamp frame (24) is including die clamping cylinder (241), control panel (231) right-hand member fixed mounting has die clamping cylinder (241), die clamping cylinder (241) right-hand member fixed mounting has inverted Z shaped plate (242), inverted Z shaped plate (242) looks remote site all is connected with right clamp post (243) with sliding fit's mode, right clamp post (243) are evenly arranged, the right clamp post (243) and inverted Z shaped plate (242) fixed connection at middle part, right clamp post (243) left end fixed mounting has electromagnetic plate (244), fillet has all been seted up with magnetism piece (237) outer end in electromagnetic plate (244), common fixedly connected with scalable support column two (245) between right clamp post (243), scalable support column two (245) left end aligns with electromagnetic plate (244) left end.

6. The stretching apparatus for BOPP film according to claim 1, wherein: the feeding frame (25) comprises a feeding column I (251), a feeding column I (251) is rotatably connected to the inner lower side of the oven (21), a feeding column II (252) is rotatably connected to the inner portion of the oven (21) and is located on the right side of the feeding column I (251), a gear II (253) is fixedly mounted at the rear ends of the feeding column I (251) and the feeding column II (252), the gear II (253) is meshed with each other, a chain wheel I (254) is fixedly mounted at the rear end of the gear II (253) on the right side, a chain wheel II (255) is fixedly mounted at the rear side of the winding roller (32), and the chain wheel I (254) is in transmission connection with the chain wheel II (255) through a chain belt (256).

7. The stretching apparatus for BOPP film according to claim 4, wherein: scalable support column one (238) includes square post one (2381), the equal fixedly connected with square post one (2381) in the looks remote site of adjacent left side clamp post (232), square post one (2381) middle part outer end is connected with square deckle board one (2382) with sliding fit's mode, square deckle board one (2382) middle part is connected with square movable block one (2383) with sliding fit's mode, between square movable block one (2383), equal fixed mounting has cylindrical spring (2384) between square movable block one (2383) and the square post one (2381), square deckle board one (2382) right-hand member fixed mounting has extrusion hemisphere (2385), extrusion hemisphere (2385) right-hand member flushes with magnetism piece (237) right-hand member.

8. The stretching apparatus for BOPP film according to claim 1, wherein: the winding roller (32) is sleeved with an I-shaped cylinder (321), a double-sided adhesive tape (322) is pasted on the surface of the I-shaped cylinder (321), the front side of the winding roller (32) is connected with a screwing screw (323) in a threaded connection mode, the screwing screw (323) is located on the left side of the central axis of the winding roller (32), a pressing plate (324) is fixedly installed at the front end of the screwing screw (323), and the length of the pressing plate (324) is smaller than the maximum distance between the central axis of the screwing screw (323) and the outer edge of the winding roller (32).

9. The stretching apparatus for BOPP film according to claim 1, wherein: the cutting knife (35) comprises an L-shaped bent knife (351), the front and back of the bidirectional threaded rod (34) are symmetrically connected with the L-shaped bent knife (351) in a threaded connection mode, and a chamfer guide chamfer (352) is formed in the upper end of the L-shaped bent knife (351).

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