阅读说明：本技术 一种提高塑料薄膜生产快速收卷的方法 (Method for improving rapid rolling of plastic film production ) 是由 谢富玉 陈先明 于 2020-04-11 设计创作，主要内容包括：本发明提供了一种提高塑料薄膜生产快速收卷的方法,包括供给机构、导向机构和辊子滑动机构,所述辊子滑动机构的上端左侧位置安装有供给机构,位于所述供给机构与辊子滑动机构之间中部位置设置有导向机构,所述的导向机构安装在辊子滑动机构上；本发明解决了现有的塑料薄膜收卷装置,是将塑料薄膜直接卷绕在收卷辊上,通过收卷辊的转动,将塑料薄膜收卷起来,中间绕卷过程容易产生褶皱,影响塑料薄膜的绕卷质量,并且都是通过人工将收卷后的料卷从放置台上搬下后,然后将料卷的芯轴抽出,再将芯轴重新放置在放置台上进行后续收卷,从而存在操作麻烦的缺点,并且提高了人力成本,对生产效率造成负面影响。(The invention provides a method for improving the rapid rolling of plastic film production, which comprises a feeding mechanism, a guide mechanism and a roller sliding mechanism, wherein the feeding mechanism is arranged at the left side position of the upper end of the roller sliding mechanism; the invention solves the problems that the existing plastic film winding device directly winds a plastic film on a winding roller, the plastic film is wound by the rotation of the winding roller, wrinkles are easily generated in the middle winding process, the winding quality of the plastic film is influenced, and the wound material roll is manually moved down from a placing table, then a mandrel of the material roll is drawn out, and the mandrel is placed on the placing table again for subsequent winding, so that the defect of troublesome operation is overcome, the labor cost is increased, and the production efficiency is negatively influenced.)

1. A method for improving the quick rolling of plastic film production uses a quick rolling device of plastic film, which comprises a supply mechanism (1), a guide mechanism (2) and a roller sliding mechanism (3), and is characterized in that: the specific method for rapidly winding the plastic film by adopting the rapid winding equipment comprises the following steps:

s1, rolling and conveying: the plastic film is driven to be conveyed forwards through the roller sliding mechanism (3), so that smooth transmission operation is provided;

s2, differential speed regulation: feeding the plastic film into a tension adjusting unit (37) through the above-mentioned step of S1, and changing the tension of the plastic film by weight adjustment and absorbing the speed difference between the front and rear components;

s3, auxiliary transmission: compacting the plastic film through the guide mechanism (2), smoothing the wrinkle position, and keeping the flowing direction of the guide rail from deviating;

s4, replacing winding: performing final winding collection on the plastic film in the step S3 through a supply mechanism (1), and performing renewal and replacement on winding cores through a winding unit (11);

a feeding mechanism (1) is installed at the left side position of the upper end of the roller sliding mechanism (3), a guide mechanism (2) is arranged at the middle position between the feeding mechanism (1) and the roller sliding mechanism (3), and the guide mechanism (2) is installed on the roller sliding mechanism (3);

the feeding mechanism (1) comprises a supporting frame plate (10), a winding unit (11), an execution cylinder (12), a transmission connecting rod (13), a connecting frame (14), a rotating shaft (15), a crank connecting rod (16), a clamping jaw (17), a feeding chute (18), a sliding material guide rail (19) and an opening and closing baffle plate (19A); the roller winding device is characterized in that the supporting frame plate (10) is installed on the roller sliding mechanism (3), the winding unit (11) is installed on the supporting frame plate (10), the executing cylinder (12) is installed on the supporting frame plate (10) through a cylinder seat, an output shaft of the executing cylinder (12) is connected with the transmission connecting rod (13) through a joint, a top end shaft head of the transmission connecting rod (13) is connected onto a rotating shaft (15), the connecting frame (14) is installed on the supporting frame plate (10), the rotating shaft (15) is symmetrically installed on the connecting frame (14) through a bearing, shaft heads at the left end and the right end of the rotating shaft (15) are respectively provided with a crank connecting rod (16) through a bearing, rotating shaft heads between the two crank connecting rods (16) are connected with each other in a movable connection mode, and the clamping jaws (17) are uniformly installed on the rotating shaft (15), a feeding chute (18) is arranged right above the clamping jaw (17), the feeding chute (18) is installed on the inner wall of the connecting frame (14), a sliding guide rail (19) is arranged right below the feeding chute (18), the sliding guide rail (19) is installed on the connecting frame (14), and an opening and closing baffle plate (19A) is installed at the position of the bottom wall of the sliding guide rail (19) in a hinged mode.

2. The method for improving the rapid rolling of the plastic film production as claimed in claim 1, wherein the method comprises the following steps: the guide mechanism (2) comprises a guide frame (20), a positioning tool (21), a limiting butterfly hinge (22), a roller bracket (23), a precise roller (24) and a cantilever handle (25); the roller positioning device is characterized in that the guide frame (20) is installed on the roller sliding mechanism (3), the positioning devices (21) are symmetrically installed on the guide frame (20) in a sliding fit mode, the limiting butterfly-shaped hinge (22) is installed on the guide frame (20) through a pin shaft, the roller support (23) is installed on the limiting butterfly-shaped hinge (22) in a movable connection mode, the roller support (23) is located and provided with a precise roller (24) through a bearing, and the cantilever handle (25) is installed on the top end plane of the roller support (23).

3. The method for improving the rapid rolling of the plastic film production as claimed in claim 1, wherein the method comprises the following steps: the roller sliding mechanism (3) comprises a positioning base frame (30), a rolling frame (31), a driving roller (32), a secondary moving roller (33), a main rotating wheel (34), an auxiliary rotating wheel (35), an execution motor (36) and a tension adjusting unit (37); the rolling frame (31) is arranged on the positioning base frame (30), the interior of the rolling frame (31) is respectively provided with a driving roller (32) and a secondary driving roller (33) from bottom to top through a bearing, the outer wall position of the rolling frame (31) is respectively provided with a main rotating wheel (34) and an auxiliary rotating wheel (35) from bottom to top through a bearing, the main rotating wheel (34) is arranged on one end shaft head of the driving roller (32) through a bearing, the auxiliary rotating wheel (35) is arranged on a shaft head at one end of the secondary moving roller (33) through a bearing, the main rotating wheel (34) and the auxiliary rotating wheel (35) are mutually abutted and rotated, the positioning base frame (30) is provided with an actuating motor (36) through a motor base, the output shaft of the actuating motor (36) is connected with the main rotating wheel (34) through a coupling, the tension adjusting unit (37) is arranged on the positioning base frame (30).

4. The method for improving the rapid rolling of the plastic film production as claimed in claim 3, wherein the method comprises the following steps: the tension adjusting unit (37) comprises a vertical column (371), a ball guide shaft (372), a lifting block (373), a metal tubing roller (374), a guide roller (375), a guide pulley (376), a steel wire (377) and a counterweight base (378); the upright post (371) is symmetrically arranged on the roller sliding mechanism (3), a ball guide shaft (372) is arranged on the inner wall of the upright post (371) through a pin shaft, the lifting blocks (373) are arranged on the ball guide shaft (372) in a sliding fit mode, a metal piping roller (374) is arranged between the two lifting blocks (373) through a bearing, a guide roller (375) is arranged right above the metal piping roller (374), the guide rollers (375) are symmetrically arranged on the outer wall of the upright post (371) through bearings, the guide pulley (376) is symmetrically arranged on the outer wall of the right upright post (371) through a bearing, a steel wire (377) is arranged on the guide pulley (376), one end shaft head of the steel wire (377) is connected with a lifting block (373) at the right position, the other end shaft head of the steel wire (377) is connected with a counterweight base (378).

5. The method for improving the rapid rolling of the plastic film production as claimed in claim 1, wherein the method comprises the following steps: the winding unit (11) comprises a slide rail (111), an electric slider (112), a rotating motor (113) and a winding shaft rod (114); the automatic feeding device is characterized in that the sliding rail (111) is installed on the feeding mechanism (1), the electric sliding block (112) is installed on the sliding rail (111) in a sliding fit mode, a rotating motor (113) is arranged on the electric sliding block (112) through a motor base, and an output shaft of the rotating motor (113) is connected with a winding shaft rod (114) through a coupler.

6. The method for improving the rapid rolling of the plastic film production as claimed in claim 1, wherein the method comprises the following steps: and a stop block is arranged on the clamping inner wall of the clamping jaw (17).

7. The method for improving the rapid rolling of the plastic film production as claimed in claim 2, wherein the method comprises the following steps: the guide frame (20) is symmetrically provided with guide vertical bars.

8. The method for improving the rapid rolling of the plastic film production as claimed in claim 4, wherein the method comprises the following steps: the counterweight base (378) is uniformly provided with counterweight blocks.

Technical Field

The invention relates to the technical field of winding and collecting, in particular to a method for improving the rapid winding of plastic film production.

Background

The plastic film is mainly a film made of polyvinyl chloride, polyethylene, polypropylene, polystyrene and other resins, is used for packaging and is used as a film coating layer, and the plastic film is widely applied to the fields of food, medicine, chemical industry and the like, wherein the food packaging accounts for the largest proportion, and great convenience is brought to the life of people;

in the production process of the plastic film, the resin material is heated and melted by an extruder to extrude a thin sheet, then the thin sheet is stretched in the temperature range below the melting point, and then the thin sheet is rolled after further processing; the existing plastic film winding device directly winds a plastic film on a winding roller, the plastic film is wound through the rotation of the winding roller, wrinkles are easily generated in the middle winding process, the winding quality of the plastic film is influenced, the wound material roll is manually moved down from a placing table, then a mandrel of the material roll is drawn out, and the mandrel is placed on the placing table again for subsequent winding, so that the defect of troublesome operation is caused, the labor cost is increased, and negative influence is caused on the production efficiency;

therefore, in order to improve the working efficiency, simple operation, good treatment effect and improve the winding quality of the plastic film, the invention provides a method for improving the quick winding of the plastic film production.

Disclosure of Invention

In order to achieve the purpose, the invention adopts the following technical scheme that a method for improving the quick winding of plastic films is used, the quick winding device of the plastic films comprises a supply mechanism, a guide mechanism and a roller sliding mechanism, and the specific method for quickly winding the plastic films by adopting the quick winding device comprises the following steps:

s1, rolling and conveying: the roller sliding mechanism is used for driving the plastic film to be conveyed forwards, so that smooth transmission operation is provided;

s2, differential speed regulation: feeding the plastic film into the tension adjusting unit through the above-mentioned step S1, and changing the tension of the plastic film through the balance weight adjustment, and absorbing the speed difference between the front and rear components;

s3, auxiliary transmission: compacting the plastic film through a guide mechanism, smoothing the wrinkle position, and keeping the flowing direction of the guide rail from deviating;

s4, replacing winding: performing final winding collection on the plastic film in the step S3 by a supply mechanism, and performing renewal and replacement on the winding core by a winding unit;

a feeding mechanism is arranged at the left side position of the upper end of the roller sliding mechanism, a guide mechanism is arranged at the middle position between the feeding mechanism and the roller sliding mechanism, and the guide mechanism is arranged on the roller sliding mechanism;

the feeding mechanism comprises a supporting frame plate, a winding unit, an execution cylinder, a transmission connecting rod, a connecting frame, a rotating shaft, a crank connecting rod, a clamping jaw, a feeding chute, a sliding guide rail and an opening and closing baffle plate; the roller winding device comprises a roller sliding mechanism, a support frame plate, a winding unit, an execution cylinder, a transmission connecting rod, a rotary shaft, a connecting frame, a claw, a feeding chute, a material sliding guide rail, a material conveying guide rail, a material, the material sliding guide rail is arranged on the connecting frame, and an opening and closing baffle is arranged at the bottom wall of the material sliding guide rail in a hinged mode; the transmission connecting rod is pushed through the execution cylinder, the rotating shaft is stirred through the transmission connecting rod to do rotary motion, the rotating shaft on the other side is driven through the crank connecting rod to move, then the clamping jaws synchronously move, the winding cores in the feeding sliding grooves are controlled to fall through the clamping jaws, the winding cores are rolled down to the working winding positions through the sliding material guide rails, and stopping is carried out through the opening and closing baffle.

The guide mechanism comprises a guide frame, a positioning tool, a limiting butterfly hinge, a roller bracket, a precise roller and a cantilever handle; the roller positioning device comprises a roller sliding mechanism, a positioning tool, a limiting butterfly hinge, a roller bracket, a cantilever handle and a positioning tool, wherein the roller sliding mechanism is arranged on a roller sliding mechanism; play guiding orientation's effect through the location utensil, rethread manual pulling cantilever handle makes the one end overlap joint of gyro wheel support on the location utensil, and the effect of conveying forward and preventing the fold is realized to the accurate gyro wheel of rethread.

The roller sliding mechanism comprises a positioning base frame, a rolling frame, a driving roller, a secondary moving roller, a main rotating wheel, an auxiliary rotating wheel, an execution motor and a tension adjusting unit; the rolling frame is arranged on the positioning base frame, a driving roller and a secondary roller are respectively arranged in the rolling frame from bottom to top through a bearing, a main rotating wheel and an auxiliary rotating wheel are respectively arranged at the position of the outer wall of the rolling frame from bottom to top through a bearing, the main rotating wheel is arranged on a shaft head at one end of the driving roller through a bearing, the auxiliary rotating wheel is arranged on a shaft head at one end of the secondary roller through a bearing, the main rotating wheel and the auxiliary rotating wheel are mutually abutted and rotated, an execution motor is arranged on the positioning base frame through a motor base, an output shaft of the execution motor is mutually connected with the main rotating wheel through a coupling, and the tension adjusting unit is arranged on the positioning base frame; the main rotating wheel is driven to rotate by the executing motor, and then the main rotating wheel rotates to abut against the auxiliary rotating wheel to rotate, so that the synchronous rotation of the driving roller and the secondary driving roller is realized, and then the plastic film is driven to be conveyed forwards.

The tension adjusting unit comprises an upright post, a ball guide shaft, a lifting block, a metal tubing roller, a guide pulley, a steel wire and a counterweight base; the lifting device comprises a roller sliding mechanism, lifting blocks, a steel wire, a lifting block, a roller guide shaft, a lifting block, a lifting pulley, a counterweight base and a counterweight base, wherein the upright columns are symmetrically arranged on the roller sliding mechanism, the ball guide shaft is arranged on the inner wall of each upright column through a pin shaft, the lifting blocks are arranged on the ball guide shafts in a sliding fit mode, a metal tubing roller is arranged between the two lifting blocks through bearings, a guide roller is arranged right above the metal tubing roller and symmetrically arranged on the outer wall of the upright column through the bearings, the guide pulley is symmetrically arranged on the outer wall of the upright column on the right side through the bearings, the steel wire is arranged on the guide pulley, one end shaft head of the steel wire is connected to; increase and decrease the balancing weight through the counter weight base and make the steel wire pass through guide pulley and assist the elevator that draws, then reciprocate along the ball guiding axle through the elevator for the metal tubing gyro wheel shifts up or moves down and control the frictional resistance of plastic film on guide roller.

The winding unit comprises a slide rail, an electric slide block, a rotating motor and a winding shaft rod; the sliding rail is arranged on the supply mechanism, the electric sliding block is arranged on the sliding rail in a sliding fit mode, a rotating motor is arranged on the electric sliding block through a motor base, and an output shaft of the rotating motor is connected with the winding shaft rod through a coupler; move around the roll shaft pole through electronic slider for around roll shaft pole interlude in the inside around rolling up the core, rethread rotating electrical machines improves around rolling up power.

Preferably; be provided with the dog on the joint inner wall of jack catch, will be provided with the dog on the joint inner wall of jack catch, be convenient for control around the automatic roll of rolling up the core quantity, through the jack catch synchronous action of controlling the configuration, cut off cylindrical falling around rolling up the core one by one, open about the jack catch lower part around rolling up the core and drop, when controlling the jack catch and close, inside around rolling up the core and stop at the dog position.

Preferably; the guide frame is symmetrically provided with guide vertical bars, the guide frame is symmetrically provided with the guide vertical bars, so that the plastic film can be guided to the winding position, the neatness of multi-roller winding of the plastic film is kept, the plastic film is prevented from being not tight enough due to the fact that wrinkles occur, and the winding quality is improved.

Preferably; the balance weight base on evenly be provided with the balancing weight, will the balance weight base on evenly be provided with the balancing weight, be convenient for adjust the tensile force of plastic film around the book, make the moving speed of plastic film and the friction of each roller all can produce the change through increase and decrease balancing weight to control plastic film's tensile force.

The invention has the beneficial effects that:

the invention provides power for smooth transmission operation by driving the plastic film to be conveyed forwards through the roller sliding mechanism; the tension of the plastic film is changed through balance weight adjustment, the speed difference between the front component and the rear component is absorbed, the plastic film is good in ductility, easy to stretch after being stressed, and easy to tear after being stressed too much, so that the friction force between the metal tubing roller and the plastic film is adjusted through the lifting of the lifting block, wrinkles cannot occur when the plastic film is rolled, and the winding quality is guaranteed.

The invention ensures the winding guide position of the plastic film through the guide mechanism, keeps the neatness of multi-roller winding of the plastic film, compacts the plastic film through the precise roller, smoothes the wrinkle position, keeps the flowing direction of the guide rail to prevent the deviation condition, and improves the winding quality.

The winding core is automatically replaced through the feeding mechanism, the automatic rolling quantity of the winding core is controlled through the clamping jaws, when the winding core rolls off from the sliding material guide rail, stopping is carried out through the opening and closing baffle plate, then the winding shaft rod made of anti-skidding materials penetrates into the winding core, multi-roller winding is achieved, the winding efficiency of the plastic film is improved, when the winding radius of the plastic film is larger and abuts against the opening and closing baffle plate, the opening and closing baffle plate angle is adjusted through the hinged spring along with the change of the winding radius, and a certain supporting effect is achieved.

Drawings

The invention is further illustrated with reference to the following figures and examples.

FIG. 1 is a schematic view of a production and winding process of the plastic film of the present invention;

FIG. 2 is a perspective view of the present invention in a primary viewing position;

FIG. 3 is a perspective view of the present invention in a rear-view position;

FIG. 4 is a partial half-sectional schematic view of the feed mechanism of the present invention;

FIG. 5 is a schematic top perspective view of the present invention;

FIG. 6 is an enlarged view of a portion of the invention at A in FIG. 5;

Detailed Description

In order to make the technical means, the creation features, the achievement purposes and the effects of the invention easy to understand, the invention is further described below by combining with the specific drawings, and it is to be noted that the embodiments and the features in the embodiments can be combined with each other in the application without conflict.

As shown in fig. 1 to 6, a method for improving the fast winding of plastic film production uses a fast winding device for plastic film, which comprises a supply mechanism 1, a guide mechanism 2 and a roller sliding mechanism 3, and the specific method for fast winding the plastic film by using the fast winding device is as follows:

s1, rolling and conveying: the roller sliding mechanism 3 is used for driving the plastic film to be conveyed forwards, so that smooth transmission operation is provided;

s2, differential speed regulation: feeding the plastic film into the tension adjusting unit 37 through the above-mentioned step S1, and changing the tension of the plastic film through the balance weight adjustment, and absorbing the speed difference between the front and rear components;

s3, auxiliary transmission: compacting the plastic film through the guide mechanism 2, smoothing the wrinkle position, and keeping the flowing direction of the guide rail from deviating;

s4, replacing winding: the plastic film in the step S3 is finally wound and collected by the supply mechanism 1, and the winding core is renewed and replaced by the winding unit 11;

a feeding mechanism 1 is arranged at the left side position of the upper end of the roller sliding mechanism 3, a guide mechanism 2 is arranged at the middle position between the feeding mechanism 1 and the roller sliding mechanism 3, and the guide mechanism 2 is arranged on the roller sliding mechanism 3;

the feeding mechanism 1 comprises a support frame plate 10, a winding unit 11, an execution cylinder 12, a transmission connecting rod 13, a connecting frame 14, a rotating shaft 15, a crank connecting rod 16, a clamping jaw 17, a feeding chute 18, a sliding material guide rail 19 and an opening and closing baffle plate 19A; the roller winding device is characterized in that the support frame plate 10 is installed on the roller sliding mechanism 3, the winding unit 11 is installed on the support frame plate 10, the execution cylinder 12 is installed on the support frame plate 10 through a cylinder seat, an output shaft of the execution cylinder 12 is connected with the transmission connecting rod 13 through a joint, a top end shaft head of the transmission connecting rod 13 is connected on the rotating shaft 15, the connection frame 14 is installed on the support frame plate 10, the rotating shaft 15 is symmetrically installed on the connection frame 14 through a bearing, crank connecting rods 16 are respectively installed at the left end shaft head and the right end shaft head of the rotating shaft 15 through bearings, the rotating shaft heads between the two crank connecting rods 16 are connected with each other in a movable connection mode, the clamping jaws 17 are evenly installed on the rotating shaft 15, the clamping inner walls of the clamping jaws 17 are provided with stop blocks, and the clamping inner walls of the clamping jaws 17, the automatic roll-off quantity of the winding cores is convenient to control, the falling of the cylindrical winding cores is cut off one by one through the synchronous action of the left and right clamping jaws 17, the winding cores at the lower parts of the left and right clamping jaws 17 are opened and fall off, and when the left and right clamping jaws 17 are closed, the inner winding cores stay at the stop block positions; a feeding chute 18 is arranged right above the clamping jaw 17, the feeding chute 18 is installed on the inner wall of the coupling frame 14, a sliding guide rail 19 is arranged right below the feeding chute 18, the sliding guide rail 19 is installed on the coupling frame 14, and an opening and closing baffle plate 19A is installed at the bottom wall position of the sliding guide rail 19 in a hinged mode; the actuating cylinder 12 pushes the transmission connecting rod 13, the transmission connecting rod 13 drives the rotating shaft 15 to do rotary motion, the crank connecting rod 16 drives the rotating shaft 15 on the other side to do motion, then the clamping jaw 17 synchronously moves, the clamping jaw 17 controls the winding core in the feeding chute 18 to fall down, the winding core rolls down to a working winding position through the sliding material guide rail 19, and the opening and closing baffle 19A stops the winding.

The winding unit 11 comprises a slide rail 111, an electric slider 112, a rotating motor 113 and a winding shaft rod 114; the sliding rail 111 is installed on the supply mechanism 1, the electric slider 112 is installed on the sliding rail 111 in a sliding fit manner, the electric slider 112 is provided with a rotating motor 113 through a motor base, and an output shaft of the rotating motor 113 is connected with a winding shaft rod 114 through a coupling; the winding shaft rod 114 is moved by the electric slider 112, so that the winding shaft rod 114 is inserted into the winding core, and the winding power is increased by the rotating motor 113.

The guide mechanism 2 comprises a guide frame 20, a positioning tool 21, a limiting butterfly hinge 22, a roller bracket 23, a precise roller 24 and a cantilever handle 25; the guide frame 20 is arranged on the roller sliding mechanism 3, the guide vertical bars are symmetrically arranged on the guide frame 20, and the guide vertical bars are symmetrically arranged on the guide frame 20, so that the plastic film can be guided to a winding position, the neatness of multi-roller winding of the plastic film is maintained, the plastic film is prevented from being wound insufficiently and tightly due to wrinkles, and the winding quality is improved; the positioning device 21 is symmetrically arranged on the guide frame 20 in a sliding fit mode, the limiting butterfly hinge 22 is arranged on the guide frame 20 through a pin shaft, the roller bracket 23 is arranged on the limiting butterfly hinge 22 in a movable connection mode, a precise roller 24 is arranged on the roller bracket 23 through a bearing, and the cantilever handle 25 is arranged on the top end plane of the roller bracket 23; the positioning tool 21 plays a role in guiding and positioning, the cantilever handle 25 is pulled manually to enable one end of the roller bracket 23 to be lapped on the positioning tool 21, and the precision roller 24 achieves the effects of forward conveying and preventing wrinkles.

The roller sliding mechanism 3 comprises a positioning base frame 30, a rolling frame 31, a driving roller 32, a secondary driving roller 33, a main runner 34, an auxiliary runner 35, an actuating motor 36 and a tension adjusting unit 37; the rolling frame 31 is installed on the positioning base frame 30, the rolling frame 31 is internally provided with a driving roller 32 and a secondary driving roller 33 from bottom to top through bearings, the outer wall of the rolling frame 31 is provided with a main runner 34 and a secondary runner 35 from bottom to top through bearings, the main runner 34 is installed on one end shaft head of the driving roller 32 through bearings, the secondary runner 35 is installed on one end shaft head of the secondary driving roller 33 through bearings, the main runner 34 and the secondary runner 35 are mutually abutted and rotated, the positioning base frame 30 is provided with an execution motor 36 through a motor base, an output shaft of the execution motor 36 is mutually connected with the main runner 34 through a coupling, and the tension adjusting unit 37 is installed on the positioning base frame 30; the main runner 34 is driven to rotate by the execution motor 36, and then the main runner 34 rotates to abut against the auxiliary runner 35 to rotate, so that the synchronous rotation of the driving roller 32 and the secondary moving roller 33 is realized, and then the plastic film is driven to be conveyed forwards.

The tension adjusting unit 37 comprises a vertical column 371, a ball guide shaft 372, a lifting block 373, a metal pipe roller 374, a guide roller 375, a guide pulley 376, a steel wire 377 and a counterweight base 378; the upright post 371 is symmetrically installed on the roller sliding mechanism 3, a ball guide shaft 372 is installed on the inner wall of the upright post 371 through a pin shaft, the lifting blocks 373 are installed on the ball guide shaft 372 through a sliding fit mode, a metal tubing roller 374 is installed between the two lifting blocks 373 through a bearing, a guide roller 375 is arranged right above the metal tubing roller 374, the guide roller 375 is symmetrically installed on the outer wall of the upright post 371 through a bearing, the guide pulley 376 is symmetrically installed on the outer wall of the upright post 371 through a bearing, a steel wire 377 is arranged on the guide pulley 376, one end shaft head of the steel wire 377 is connected on the lifting block 373 at the right side position, the other end shaft head of the steel wire 377 is connected with a counterweight base 378, counterweight blocks are uniformly arranged on the counterweight base 378, and counterweight blocks are uniformly arranged on the counterweight base 378, the tension force of the plastic film in winding is convenient to adjust, the moving speed of the plastic film and the friction of each roller can be changed by increasing or decreasing the balancing weight, and therefore the tension force of the plastic film is controlled; the counterweight blocks are increased or decreased through the counterweight base 378, so that the steel wire 377 assists in pulling up the lifting block 373 through the guide pulley 376, and then the lifting block 373 moves up and down along the ball guide shaft 372, so that the metal tubing roller 374 moves up or down to control the friction resistance of the plastic film on the guide roller 375.

The foregoing illustrates and describes the principles, general features, and advantages of the present invention. It will be understood by those skilled in the art that the present invention is not limited to the embodiments described above, which are given by way of illustration of the principles of the present invention, and that various changes and modifications may be made without departing from the spirit and scope of the invention as defined by the appended claims. The scope of the invention is defined by the appended claims and equivalents thereof.