CN115923112B - Stretching equipment for BOPP film - Google Patents

Abstract

The invention relates to the technical field of BOPP film stretching, in particular to a stretching device for BOPP film, comprising a conveying unit, a stretching unit and a winding unit, a stretching unit is fixedly installed on the conveying unit, and the lower end of the stretching unit is fixed A winding unit is installed. In the present invention, the thick sheet processed by the tape casting machine is flattened and conveyed through the conveying unit, so that it enters the stretching unit smoothly, and the thick sheet is synchronously bidirectionally stretched through the stretching unit. Before stretching, by adding additional contact points To increase the stretch point of the thick film, so that the stretched film edge deformation point increases, thereby reducing the width of the film edge deformation, reducing the width of the film edge to be cut, thereby improving the processing utilization of the equipment, through winding The unit rewinds the film, and can quickly separate the rewound film from the equipment, thereby shortening the time for the equipment to stop working and improving the processing efficiency of the equipment.

Description

A kind of stretching equipment for BOPP film

technical field

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

Background technique

BOPP film is an excellent transparent flexible packaging material. It is made of polypropylene particles that are co-extruded to form a sheet, and then stretched in both vertical and horizontal directions. BOPP film is light, non-toxic, odorless, and moisture-proof. , a wide range of applications, stable performance, high efficiency and energy saving in production, and reduced total thickness. The main processing method of BOPP film is the flat film method. The flat film method is divided into synchronous biaxial stretching method and stepwise biaxial stretching method. Processing of BOPP films for simultaneous biaxial stretching.

The synchronous bidirectional stretching method is to send the thick film processed by the tape casting machine to the stretching equipment for simultaneous stretching in both vertical and horizontal directions. After stretching, the edge of the stretched film is deformed and cannot be used. It is cut before rolling, because when the film is stretched by the synchronous biaxial stretching method, biaxial stretching is required, but because the stretching contact points of the film are small, the edge deformation of the film is large, resulting in the size of the waste material after cutting the film Larger, the waste rate and production cost of the film are high, and after the film winding is completed, it needs to be removed, and then the upper winding part is re-installed, causing the equipment to stop working for a period of time, reducing the processing efficiency of the equipment.

Contents of the invention

In order to solve the above technical problems, the present invention provides a stretching device for BOPP film.

A stretching device for BOPP film, comprising a conveying unit, a stretching unit and a winding unit, a stretching unit is fixedly installed on the conveying unit, and a winding unit is fixedly installed at the lower end of the stretching unit.

The stretching unit includes an oven, an oven is fixedly installed on the conveying unit, an electric push rod is fixedly installed symmetrically front and rear inside the oven, the end of the electric push rod is fixedly installed with a left clamping frame, and the right end of the left clamping frame is fixedly installed with a right clamping frame. Tight frame, the lower side of the oven is rotatably connected with a feeding frame.

The rewinding unit includes a fixed vertical plate, the lower end of the oven is fixedly installed with a fixed vertical plate, 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 installed with a motor 1 through a motor seat, and the output shaft of the motor 1 passes through a coupling. The shaft device is fixedly connected with the winding roller, and the front end of the fixed vertical plate is connected with a two-way threaded rod. The front and rear sides of the two-way threaded rod are provided with thread grooves with opposite rotation directions. The front end of the fixed vertical plate is fixedly equipped with a guide rod that runs through the cutting knife.

Optimum technical solution 1: the conveying unit includes a workbench, the front end of the workbench is connected with conveying rollers symmetrically rotating on the left and right sides, the rear end of the conveying rollers is fixedly equipped with gear one, and the gear one meshes with each other, and the rear end of the workbench is fixed by the motor seat Motor 2 is installed, and the output shaft of motor 2 is fixedly connected with gear 1 on the left side through a coupling. The middle part of the conveying roller is connected with a threaded column for rotation, and the threaded column is connected with a round table block with a small diameter end horizontally backward in a threaded manner. The outer end of the conveyor roller is uniformly provided with a sliding fitting groove, and the extending column is connected with the sliding fitting in the sliding fitting groove, and the extending column is connected with the inclined surface of the round table block in a sliding fitting manner, and the end of the extending column is fixed. A positioning bracket is installed, and an extrusion column is rotatably connected to the positioning bracket.

Optimal technical solution 2: the oven includes a rectangular plate, a rectangular through hole is opened in the middle of the rectangular plate, a guide block is fixedly installed on the upper end of the left clamping frame, a grid pipe is fixedly installed on the inner wall of the rectangular plate, and a grid pipe is evenly fixed on the grid pipe. The tapered air outlet runs through the rectangular plate, the right end of the oven is fixed with an air pump, the right end of the air pump is fixed with a threaded air intake pipe, the air inlet of the threaded air intake pipe is fixed with a filter plate, and the outer end of the threaded air intake pipe is fixed with an insulation cover , The heating wire is fixedly installed in the insulation cover.

Optimum technical solution 3: the left clamping frame includes a control panel, and the control panel is fixedly installed at the end of the electric push rod, and the opposite end of the control panel is connected with the left clamping column in the way of sliding fit up and down, and the left clamping column in the middle is The column is fixedly connected with the control panel, and the middle part of the adjacent left clamping column is jointly hinged with a V-shaped hinged rod. The V-shaped hinged rod is composed of two shafts connected by rotation with the same axis. The middle part of the V-shaped hinged rod is close to one end of the control board. The connecting rods are rotatably connected with a rectangular connecting plate in a sliding fit, the middle of the control panel is fixedly installed with an electric telescopic rod, the end of the electric telescopic rod is fixedly connected with the rectangular connecting plate, and the right end of the left clamping column is fixedly installed with a magnetic The suction block and the adjacent left clamping columns are jointly fixedly connected with a telescopic support column 1, and the right end of the telescopic support column 1 is aligned with the right end of the magnetic suction block.

Preferred technical solution four: the right clamping frame includes a clamping cylinder, the right end of the control panel is fixedly installed with a clamping cylinder, the right end of the clamping cylinder is fixedly installed with an inverted Z-shaped plate, and the opposite ends of the inverted Z-shaped plate are all in a sliding fit The right clamping column is connected with the right clamping column, and the right clamping column is evenly arranged. The right clamping column in the middle is fixedly connected with the inverted Z-shaped plate, and the left end of the right clamping column is fixedly installed with an electromagnetic plate. There are rounded corners, and the right clamping columns are jointly fixedly connected with the second telescopic support column, and the left end of the second telescopic support column is aligned with the left end of the electromagnetic plate.

Optimum technical solution five: the feeding frame includes a feeding column 1, a feeding column 1 is rotatably connected to the lower side inside the oven, and a feeding column 2 is rotatably connected to the inside of the oven and located on the right side of the feeding column 1, and the rear end of the feeding column 1 and the feeding column 2 are rotatably connected. Both gears are fixedly installed with the second gear, and the second gear is meshed. The rear end of the second gear on the right is fixed with the first sprocket, and the rear side of the winding roller is fixed with the second sprocket. Belt drive connection.

Optimum technical solution six: the winding roller is covered with an I-shaped cylinder, the surface of the I-shaped cylinder is pasted with double-sided adhesive tape, and the front side of the winding roller is connected with a tightening screw in a threaded manner. On the left side of the central axis of the roller, a tightening plate is fixedly installed at the front end of the tightening screw, and the length of the tightening plate is less than the maximum distance between the central axis of the tightening screw and the outer edge of the winding roller.

Optimum technical solution 7: the cutting knife includes an L-shaped machete, the L-shaped machete is connected to the two-way threaded rod symmetrically in a threaded manner, and the upper end of the L-shaped machete is provided with a chamfering guide chamfer.

Optimum technical solution eight: the telescopic support column 1 includes a square column 1, the opposite ends of the adjacent left clamping columns are fixedly connected to the square column 1, and the outer end of the middle part of the square column 1 is connected to a square frame in a sliding fit Plate 1, the middle part of the square frame plate 1 is connected with a square moving block 1 in a sliding fit, cylindrical springs are fixedly installed between the square moving blocks 1, between the square moving block 1 and the square column 1, and the right end of the square frame plate 1 is fixed An extrusion hemisphere is installed, and the right end of the extrusion hemisphere is flush with the right end of the magnetic block.

The present invention has the following beneficial effects: 1. A kind of stretching equipment for BOPP film provided by the present invention, through the conveying unit, the thick sheet processed by the tape casting machine is flattened and conveyed, so that it enters the stretching unit smoothly, and passes through the stretching unit Perform synchronous biaxial stretching on the thick film. Before stretching, increase the stretching point of the thick film by adding additional contact points, so that the edge deformation points of the stretched film will increase, thereby reducing the width of the film edge deformation. Reduce the width to be cut off at the edge of the film, thereby improving the processing utilization of the equipment. The film is rewound through the rewinding unit, and the rewound film can be quickly separated from the equipment, thereby shortening the time for the equipment to stop working and improving the equipment. processing efficiency.

2. The conveying unit provided by the present invention changes the position of the round table block by rotating the threaded column, thereby changing the extension length of the extended column, so that the extruding column and the slab are in close contact, so as to achieve the extrusion of the slab and the The purpose of conveying is to ensure that the thick sheet is in a flat state when it enters the stretching unit, and to reduce the difficulty of stretching the thick sheet by the stretching unit.

3. The stretching unit provided by the present invention prevents impurities in the gas from polluting the surface of the film through the filter plate, affecting the quality of the film, and prevents the heat generated by the heating wire from contacting the outside world through the insulation cover, thereby causing heat loss and increasing processing costs.

4. The stretching unit provided in the present invention uses telescopic support columns to position the slabs between a pair of adjacent left clamping columns in points, thereby increasing the thickness of the slabs without increasing the number of left clamping columns. The number of points for clamping and positioning ensures that the deformation between the deformation points of the thick sheet after stretching is reduced, thereby reducing the width to be cut off the edge of the film, reducing the amount of waste generated during film processing, and improving the device. Utilization of processed films.

5. The winding unit provided in the present invention realizes the relative fixation between the I-shaped cylinder and the winding roller by rotating and tightening the screw to control the pressing plate, so as to position the I-shaped cylinder or quickly disassemble the I-shaped cylinder. The slab is squeezed and positioned, and the square frame plate is evenly distributed between the left clamping columns through the cylindrical spring, so that the slab between the left clamping columns is evenly stressed.

Description of drawings

FIG. 1 is a schematic diagram of a front-view stereoscopic structure of the present invention.

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

Fig. 3 is a cross-sectional view along the line A-A of Fig. 2 of the present invention.

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

Fig. 5 is a sectional view along the B-B direction of Fig. 4 of the present invention.

FIG. 6 is a partial enlarged view of N in FIG. 4 of the present invention.

FIG. 7 is a partially enlarged view of the M in FIG. 5 of the present invention.

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

FIG. 9 is a schematic perspective view of the left clamping frame and the right clamping frame 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 at F of FIG. 9 of the present invention.

FIG. 12 is a partial enlarged view of G in FIG. 4 of the present invention.

FIG. 13 is a partial enlarged view of H in FIG. 4 of the present invention.

Fig. 14 is a comparison diagram of the film state before and after use of the first telescopic support column and the second telescopic support column of the present invention.

In the figure: 1, conveying unit; 11, working table; 12, conveying roller; 13, gear 1; 14, motor 2; 15, threaded column; 16, round table block; 17, sliding fit groove; 19. Positioning bracket; 20. Extrusion column; 2. Stretching unit; 21. Oven; 211. Rectangular plate; 212. Rectangular through hole; 213. Guide block; 216, air pump; 217, threaded intake pipe; 218, filter plate; 219, heat preservation cover; 220, heating wire; 22, electric push rod; 23, left clamping frame; 231, control panel; 232, left clamping column 233, V-shaped hinged rod; 234, connecting rod; 235, rectangular connecting plate; 236, electric telescopic rod; One; 2383, square moving block one; 2384, cylindrical spring; 2385, extruding hemisphere; 24, right clamping frame; 241, clamping cylinder; 242, inverted Z-shaped plate; 243, right clamping column; 244, electromagnetic Plate; 245, telescopic supporting column two; 25, feeding rack; 251, feeding column one; 252, feeding column two; 253, gear two; 254, sprocket one; 255, sprocket two; 256, tooth chain belt; 3. Rewinding unit; 31. Fixed vertical plate; 32. Rewinding roller; 321. I-shaped cylinder; 322. Double-sided adhesive tape; 323. Tightening screw; 324. Compression plate; 33. Motor one; Rod; 35, cutting knife; 351, L-shaped machete; 352, guide material chamfering; 36, guide rod.

Implementation

The following will clearly and completely describe the technical solutions in the embodiments of the present invention with reference to the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only some, not all, embodiments of the present invention. Based on the embodiments of the present invention, all other embodiments obtained by persons of ordinary skill in the art without making creative efforts belong to the protection scope of the present invention.

Referring to Fig. 1, a kind of stretching equipment for BOPP film, comprises conveying unit 1, stretching unit 2 and winding unit 3, described conveying unit 1 is fixedly installed with stretching unit 2, and the lower end of stretching unit 2 is fixedly installed with Winding unit 3.

Referring to Fig. 1 and Fig. 9, the stretching unit 2 includes an oven 21, the oven 21 is fixedly installed on the conveying unit 1, the electric push rod 22 is fixedly installed symmetrically front and back inside the oven 21, and the end of the electric push rod 22 is fixedly installed with a left The clamping frame 23, the right clamping frame 24 is fixedly installed on the right end of the left clamping frame 23, and the feeding frame 25 is connected to the lower side of the oven 21; The oven 21 heats the slab to reach the stretching temperature. At this time, the slab is clamped by the left clamping frame 23 and the right clamping frame 24, and the slab is stretched horizontally and vertically. The feeding rack 25 flattens and conveys the stretched film.

Continue to refer to Fig. 1, Fig. 4, Fig. 5 and Fig. 9, the rewinding unit 3 includes a fixed vertical plate 31, the lower end of the oven 21 is fixedly installed with a fixed vertical plate 31, and the front end of the fixed vertical plate 31 is rotatably connected with a winding roller 32, The rear end of the fixed vertical plate 31 is fixedly installed with a motor one 33 through the motor base, and the output shaft of the motor one 33 is fixedly connected with the winding roller 32 through a coupling. The front and rear sides are provided with threaded grooves with opposite directions of rotation, and the two-way threaded rod 34 is symmetrically connected with a cutting knife 35 in a threaded manner. The final film is transported to the winding roller 32 and positioned, according to the final stretching position of the left clamping frame 23 and the right clamping frame 24, the distance between the cutting knives 35 is adjusted so that the distance between the cutting knives 35 and The distance between the left clamping frames 23 during final stretching is the same, the distance between the right clamping frames 24 is always equal to the distance between the left clamping frames 23, and the edge after stretching and deformation of the film is stretched by the cutting knife 35 Cutting is carried out, and the winding roller 32 is driven to rotate by the motor one 33, and the film after the cutting process is wound up.

Referring to Fig. 4, Fig. 5, Fig. 8 and Fig. 12, the conveying unit 1 includes a workbench 11, the front end of the workbench 11 is connected with conveying rollers 12 symmetrically rotating on the left and right sides, and the rear ends of the conveying rollers 12 are fixedly equipped with a gear 13 , the gear one 13 is meshed, the rear end of the workbench 11 is fixedly installed with the motor two 14 through the motor seat, the output shaft of the motor two 14 is fixedly connected with the left gear one 13 through a coupling, and the middle part of the conveying roller 12 is connected with a threaded column for rotation 15. The threaded column 15 is threadedly connected with a round table block 16 with a small diameter end horizontally backward, and the outer end of the conveying roller 12 is evenly provided with a sliding fit groove 17, and a sliding fit groove 17 is connected with a protruding groove in a sliding fit manner. Column 18, stretch out column 18 and be connected with the mode of sliding fit between the inclined surface of round table block 16, stretch out column 18 ends and be fixedly installed with positioning support 19, be connected with extruding column 20 on the positioning support 19 rotation; Two 14 drives the gear one 13 on the left to rotate. With the cooperation of the gear one 13 on the right, the conveying rollers 12 on the left and right sides rotate in opposite directions. The post 15 makes the round table block 16 move horizontally backward, and the extension post 18 moves toward the outside of the sliding fit groove 17 along the radial direction of the conveying roller 12 under the action of the inclined surface of the round table block 16, and the extension length of the extension post 18 increases, and then The distance between the extruding column 20 and the axis of the conveying roller 12 increases, so that the extruding column 20 can adapt to the change of the thickness of the slab and stick to the slab.

4 and 13, the oven 21 includes a rectangular plate 211, a rectangular through hole 212 is opened in the middle of the rectangular plate 211, a guide block 213 is fixedly installed on the upper end of the left clamping frame 23, and a grid pipe is fixedly installed on the inner wall of the rectangular plate 211. 214, the tapered air outlet 215 that runs through the rectangular plate 211 is uniformly and fixedly installed on the grid pipe 214, and the right end of the oven 21 is fixedly equipped with an air pump 216, and the right end of the air pump 216 is fixedly installed with a threaded air intake pipe 217, and the threaded air intake pipe 217 is used for air intake A filter plate 218 is fixedly installed at the mouth, and a thermal insulation cover 219 is fixedly installed at the outer end of the threaded air intake pipe 217, and a heating wire 220 is fixedly installed inside the thermal insulation cover 219; the gas heated by the heating wire 220 is passed into the grid pipe 214 through the air pump 216 , and finally discharged through the tapered gas outlet 215, the gas heating distance is increased through the threaded gas inlet pipe 217, the filter plate 218 is used to prevent impurities in the gas from contaminating the film surface, and the heat generated by the heating wire 220 is prevented from contacting the outside world through the insulation cover 219 , thereby causing the heat to be lost, and the slab is smoothly entered between the left clamping frame 23 and the right clamping frame 24 through the guide block 213 .

Referring to Fig. 4, Fig. 5, Fig. 9, Fig. 10 and Fig. 11, the left clamping frame 23 includes a control board 231, the end of the electric push rod 22 is fixedly equipped with a control board 231, and the opposite ends of the control board 231 slide up and down The left clamping column 232 is connected in a cooperative manner, the left clamping column 232 in the middle is fixedly connected with the control panel 231, and the middle parts of the adjacent left clamping columns 232 are jointly hinged with a V-shaped hinged rod 233, V-shaped hinged rod 233 It consists of two shafts that are rotatably connected with the same axis. The middle part of the V-shaped hinged rod 233 is rotatably connected to the end close to the control board 231 with a connecting rod 234. The connecting rods 234 are jointly connected with a rectangular connecting plate 235 in a sliding fit. The middle part is fixedly equipped 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 installed with a magnetic block 237, and the adjacent left clamping columns 232 are jointly fixedly connected with a Telescopic support column one 238, the right end of the telescopic support column one 238 is aligned with the right end of the magnetic block 237; after the left clamping frame 23 and the right clamping frame 24 clamp the thick sheet, the control board is driven by the electric push rod 22 231 move opposite to each other to stretch the slab horizontally. At the same time, the electric telescopic rod 236 drives the rectangular connecting plate 235 and the connecting rod 234 to move toward each other, so that the opening angle of the V-shaped hinged rod 233 becomes larger and the left clamp The distance between the tight columns 232 is increased, and the slab is stretched longitudinally, and finally the purpose of synchronously stretching the slab horizontally and vertically is achieved. When the distance between the left clamping columns 232 increases , the elongation length of the telescopic support column 1 238 increases at the same time, the telescopic support column 1 238 and the left clamping column 232 are synchronously contacted with the slab, and the telescopic support column 1 238 is connected to the adjacent left clamping column 232 The slabs between the slabs are positioned in points, and the number of locating points is further increased on the number of locating points formed by the original left clamping column 232, so that stretching points are evenly distributed on the surface of the slab, and the slab is evenly pulled. Stretch effect, to ensure that the deformation between the deformation points of the thick sheet after stretching is reduced, thereby reducing the width to be cut off the edge of the film, reducing the amount of waste generated during film processing, and improving the utilization rate of the film processed by the device .

Referring to Fig. 4, Fig. 5, Fig. 6, Fig. 9 and Fig. 11, the right clamping frame 24 includes a clamping cylinder 241, the right end of the control board 231 is fixedly equipped with a clamping cylinder 241, and the right end of the clamping cylinder 241 is fixedly installed with an inverted The Z-shaped plate 242 and the opposite ends of the inverted Z-shaped plate 242 are connected with the right clamping column 243 in a sliding fit manner, and the right clamping columns 243 are evenly arranged, and the right clamping column 243 in the middle is fixedly connected with the inverted Z-shaped plate 242 , the left end of the right clamping column 243 is fixedly equipped with an electromagnetic plate 244, and the outer end of the electromagnetic plate 244 and the magnetic block 237 are provided with rounded corners. The left end of the supporting column 245 is aligned with the left end of the electromagnetic plate 244; the clamping cylinder 241 drives the inverted Z-shaped plate 242 to move towards the control plate 231, so that the electromagnetic plate 244 on the right clamping column 243 is close to the thick sheet, and the electromagnetic The plate 244 is energized to make the magnetic block 237 and the electromagnetic plate 244 attract each other through a thick sheet. When the distance between the left clamping columns 232 increases, the magnetic block 237 and the electromagnetic plate 244 attract each other , the left clamping column 232 can drive the right clamping column 243 to move synchronously, and the telescopic supporting column 245 cooperates with the telescopic supporting column 1 238 to clamp the thick sheet synchronously, and the multi-point clamping and positioning of the thick sheet is carried out through the above operations.

Referring to Fig. 2, Fig. 3 and Fig. 8, the feeding rack 25 includes a feeding column 251, and the lower side of the oven 21 is rotatably connected with a feeding column 251, and the inside of the oven 21 is rotatably connected with a feeding column located on the right side of the feeding column 251 Two 252, feeding column one 251 and feeding column two 252 rear ends are fixedly installed with gear two 253, and gear two 253 are meshed, and the rear end of the right gear two 253 is fixedly installed with sprocket one 254, and the rear side of winding roller 32 A sprocket 2 255 is fixedly installed, and the sprocket 1 254 and the sprocket 2 255 are connected through a toothed chain belt 256; 33 drives the purpose of gear two 253 rotations, thereby drives feed column one 251 and feed column two 252 to rotate oppositely, film is carried out flattening and conveying, controls its conveying speed.

Referring to Fig. 3-5 and Fig. 9, the winding roller 32 is covered with an I-shaped cylinder 321, the surface of the I-shaped cylinder 321 is pasted with a double-sided adhesive tape 322, and the front side of the winding roller 32 is connected with a screw threaded connection. Tighten the screw rod 323, the tightened screw rod 323 is positioned at the left side of the central axis of the winding roller 32, the front end of the tightened screw rod 323 is fixedly equipped with a pressing plate 324, and the length of the tightening plate 324 is less than the distance between the central axis line of the tightening screw rod 323 and the outer edge of the winding roller 32. The maximum distance; the film is rewound through the I-shaped cylinder 321, and the film is positioned through the double-sided adhesive tape 322. The pressing plate 324 in the initial state is kept horizontal and is located on the left side of the central axis of the winding roller 32 as a whole. At this time, the pressing plate 324 The I-shaped cylinder 321 is blocked, and the I-shaped cylinder 321 cannot be removed from the winding roller 32. After the I-shaped cylinder 321 has finished rewinding the film, the screw 323 is tightened by turning clockwise, so that the pressing plate 324 is positioned at the winding roller as a whole. In the range of the side end faces of the roller 32, the pressing plate 324 no longer blocks the I-shaped cylinder 321, and the I-shaped cylinder 321 can be taken off smoothly.

Referring to Fig. 4, described cutting knife 35 comprises L-shaped scimitar 351, and bidirectional threaded rod 34 is connected with L-shaped scimitar 351 in the mode of screw connection symmetrically front and back, and L-shaped scimitar 351 upper end is provided with guide chamfer 352; The L-shaped machete 351 cuts the edge of the film, and the edge of the cut film falls smoothly through the material guide chamfer 352, thereby preventing waste from accumulating on the L-shaped machete 351 and affecting the cutting of the L-shaped machete 351.

Referring to Fig. 6 and Fig. 7, the telescopic support column 1 238 includes a square column 2381, and the opposite ends of the adjacent left clamping columns 232 are fixedly connected with the square column 1 2381, and the outer end of the middle part of the square column 2381 is slidable. A square frame plate 1 2382 is connected in a mating manner, and the middle part of the square frame plate 1 2382 is connected with a square moving block 1 2383 in a sliding fit, between the square moving block 1 2383, between the square moving block 1 2383 and the square column 1 2381 Both are fixedly installed with a cylindrical spring 2384, and the right end of the square frame plate 1 2382 is fixedly equipped with an extruding hemisphere 2385, and the right end of the extruding hemisphere 2385 is flush with the right end of the magnetic block 237; The cylindrical spring 2384 ensures that the square frame plate 1 2382 is evenly distributed between the left clamping columns 232, so that the slabs between the left clamping columns 232 are evenly stressed.

During the specific work, firstly, the thick sheet from the tape casting machine is transported to the oven 21 through the conveying unit 1, and the thick sheet is heated through the oven 21 to make it reach the stretching temperature. At this time, the left clamping frame 23 and the right clamping The rack 24 clamps the thick sheet, and stretches the thick sheet horizontally and vertically. The stretched film is flattened and transported by the feeding rack 25, and the flattened film is transported to the winding machine. Roller 32 and carry out positioning, according to the final stretching position of left clamping frame 23 and right clamping frame 24, adjust the distance between cutting knife 35, make the distance between cutting knife 35 and left clamping frame 23 and right The final stretching distance of the clamping frame 24 is the same, the edge of the film stretching deformation is cut by the cutting knife 35, and the winding roller 32 is driven by the motor one 33 to rotate, and the film after the cutting process is wound up.

Although the embodiments of the present invention have been shown and described, those skilled in the art can understand that various changes, modifications and substitutions can be made to these embodiments without departing from the principle and spirit of the present invention. and modifications, the scope of the invention is defined by the appended claims and their equivalents.

Claims (5)

1. A stretching device for BOPP film, comprising delivery unit (1), stretching unit (2) and winding unit (3), characterized in that: a stretching unit is fixedly installed on the delivery unit (1) (2), the lower end of the stretching unit (2) is fixedly installed with a winding unit (3); wherein: The stretching unit (2) includes an oven (21), the conveying unit (1) is fixedly equipped with an oven (21), and an electric push rod (22) is fixedly installed front and rear symmetrically inside the oven (21), and the electric push rod (22 ) ends are fixedly equipped with a left clamping frame (23), the right end of the left clamping frame (23) is fixedly mounted with a right clamping frame (24), and the lower side of the oven (21) is rotatably connected with a feeding frame (25); The winding unit (3) includes a fixed vertical plate (31), the lower end of the oven (21) is fixedly installed with a fixed vertical plate (31), and the front end of the fixed vertical plate (31) is rotatably connected with a winding roller (32). The rear end of the plate (31) is fixedly installed with a motor one (33) through a motor base, the output shaft of the motor one (33) is fixedly connected with the winding roller (32) through a coupling, and the front end of the fixed vertical plate (31) is rotationally connected with a bidirectional Threaded rod (34), the two-way threaded rod (34) front and rear sides are provided with the screw groove of opposite direction of rotation, and two-way threaded rod (34) is connected with cutting knife (35) in the mode of screw connection symmetrically before and after, fixed vertical plate (31 ) The front end is fixedly installed with a guide rod (36) that runs through the cutting knife (35); The oven (21) includes a rectangular plate (211), a rectangular through hole (212) is opened in the middle of the rectangular plate (211), a guide block (213) is fixedly installed on the upper end of the left clamping frame (23), and the rectangular plate (211) A grid pipe (214) is fixedly installed on the inner wall, and a tapered air outlet (215) passing through the rectangular plate (211) is evenly and fixedly installed on the grid pipe (214), and an air pump (216) is fixedly installed on the right end of the oven (21). Air pump (216) right-hand side is fixedly installed with threaded air inlet pipe (217), and threaded air inlet pipe (217) air inlet is fixedly installed with filter plate (218), and threaded air inlet pipe (217) outer end is fixedly installed with insulation cover ( 219), heating wire (220) is fixedly installed in the thermal insulation cover (219); The left clamping frame (23) includes a control board (231), the end of the electric push rod (22) is fixedly equipped with a control board (231), and the opposite end of the control board (231) is connected with a left The clamping column (232), the left clamping column (232) in the middle part is fixedly connected with the control panel (231), and the middle parts of the adjacent left clamping columns (232) are jointly hinged with a V-shaped hinge rod (233), V The hinged rod (233) is made up of two rod shafts that are rotatably connected to the center of the shaft. The middle part of the hinged rod (233) near the control panel (231) is connected with a connecting rod (234) for rotation, and the connecting rods (234) are connected together by A rectangular connection plate (235) is connected in a sliding fit manner, an electric telescopic rod (236) is fixedly installed in the middle of the control board (231), the end of the electric telescopic rod (236) is fixedly connected to the rectangular connection plate (235), and the left clamping column The right end of (232) is fixedly equipped with a magnetic suction block (237), and the adjacent left clamping columns (232) are jointly fixedly connected with a telescopic support column one (238), and the right end of the telescopic support column one (238) is connected with the magnetic The right end of suction block (237) is aligned; The right clamping frame (24) includes a clamping cylinder (241), a clamping cylinder (241) is fixedly installed on the right end of the control panel (231), and an inverted Z-shaped plate (242) is fixedly installed on the right end of the clamping cylinder (241). , The opposite ends of the inverted Z-shaped plate (242) are connected with the right clamping column (243) in a sliding fit manner, and the right clamping column (243) is evenly arranged, and the right clamping column (243) in the middle is connected to the inverted Z-shaped The plates (242) are fixedly connected, the left end of the right clamping column (243) is fixedly equipped with an electromagnetic plate (244), the outer ends of the electromagnetic plate (244) and the magnetic block (237) are provided with rounded corners, and the right clamping column (243) ) are jointly fixedly connected with a telescopic support column two (245), and the left end of the telescopic support column two (245) is aligned with the left end of the electromagnetic plate (244); The telescopic support column one (238) includes a square column one (2381), and the opposite ends of the adjacent left clamping columns (232) are fixedly connected with a square column one (2381), and the outer middle part of the square column one (2381) The end is connected with a square frame plate 1 (2382) in a sliding fit, and the middle part of the square frame plate 1 (2382) is connected with a square moving block 1 (2383) in a sliding fit. Between the square moving blocks 1 (2383), square A cylindrical spring (2384) is fixedly installed between the moving block 1 (2383) and the square column 1 (2381), and an extrusion hemisphere (2385) is fixedly installed on the right end of the square frame plate 1 (2382), and the right end of the extrusion hemisphere (2385) flush with the right end of the magnetic block (237). 2. A kind of stretching equipment for BOPP film according to claim 1, characterized in that: the conveying unit (1) includes a workbench (11), and the left and right sides of the front end of the workbench (11) are symmetrically rotated and connected with conveying Roller (12), conveying roller (12) rear end is all fixedly installed with gear one (13), and gear one (13) is meshed, and workbench (11) rear end is fixedly installed with motor two (14) by motor seat, and motor Two (14) output shafts are fixedly connected with the gear one (13) on the left side by a shaft coupling, and the middle part of the conveying roller (12) is rotatably connected with a threaded post (15), and the threaded post (15) is connected with a threaded connection. The circular platform block (16) with the small-diameter end horizontally backward, the outer end of the conveying roller (12) is evenly provided with a sliding fit groove (17), and the sliding fit groove (17) is connected with a protruding column (18) in a sliding fit manner, Stretch out column (18) and be connected with the mode of sliding fit between the inclined surface of round table block (16), stretch out column (18) end and be fixedly equipped with positioning bracket (19), rotate on the positioning bracket (19) and be connected with Squeeze the column (20). 3. A kind of stretching equipment for BOPP film according to claim 1, characterized in that: the feeding frame (25) includes a feeding column one (251), and the inner lower side of the oven (21) is rotatably connected with a feeding column one (251), the interior of the oven (21) and the right side of the first feeding column (251) are rotatably connected to the second feeding column (252), and the rear ends of the first feeding column (251) and the second feeding column (252) are fixedly installed with the second gear (253), the gear two (253) are meshed, the rear end of the gear two (253) on the right is fixedly equipped with a sprocket one (254), and the winding roller (32) rear side is fixedly equipped with a sprocket two (255), The first sprocket (254) and the second sprocket (255) are connected through a toothed chain belt (256) transmission. 4. A kind of stretching equipment for BOPP film according to claim 1, characterized in that: an I-shaped cylinder (321) is sleeved on the winding roller (32), and the surface of the I-shaped cylinder (321) is pasted with Double-sided adhesive tape (322), the front side of the winding roller (32) is connected with a tightening screw (323) in a threaded manner, the tightening screw (323) is located on the left side of the central axis of the winding roller (32), and the tightening screw (323) front end is fixedly installed with pressing plate (324), and the length of pressing plate (324) is less than the maximum distance of screw rod (323) central axis and winding roller (32) outer edge. 5. A kind of stretching equipment for BOPP film according to claim 1, characterized in that: the cutting knife (35) includes an L-shaped machete (351), and the two-way threaded rod (34) is symmetrically connected by threads The method is connected with an L-shaped machete (351), and the upper end of the L-shaped machete (351) is provided with a chamfering guide chamfer (352).

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