Tension adjusting mechanism for plastic film printing

Abstract

The utility model relates to the technical field of plastic films, and discloses a tension adjusting mechanism for plastic film printing, which comprises a workbench, the two ends of the front side and the rear side of the top of the workbench are fixedly connected with fixing plates, and one side of each fixing plate is rotatably connected with two corresponding first rollers at equal intervals. Extension plates are fixedly connected to the left side and the right side of the front end of the workbench correspondingly, the front ends of the adjacent sides of the two extension plates are rotationally connected with the same unwinding cylinder correspondingly, sliding grooves are formed in the adjacent sides of the two extension plates correspondingly, and first telescopic rods are fixedly connected to the bottoms of the inner sides of the two sliding grooves correspondingly. According to the tension adjusting device, a plastic film roll is installed on the unwinding drum, a film sequentially passes through the first rollers which are rotationally connected to the fixing plate at equal intervals to achieve conveying supporting and guiding, in the conveying process, the first telescopic rods are used for pushing the sliding blocks and the clamping plates to drive the second rollers to adjust tension, and tension adjustment in the film conveying process is achieved.

Description

TECHNICAL FIELD

[0001] The utility model relates to plastic film technical field especially relates to a tension adjusting mechanism for plastic film printing. BACKGROUND

[0002] Plastic film is a kind of sheet material made of high molecular polymer, plastic film has many excellent characteristics such as light, transparent, moisture-proof and waterproof, is widely used in mulching film covering in agricultural production, can effectively maintain soil humidity, improve soil temperature, promote crop growth, in the field of food packaging, can prevent food from damp, oxidation and microbial contamination, prolong food shelf life, greatly improve the storage and transportation safety and convenience of product, occupies the indispensable position in modern industrial and agricultural production and daily life.

[0003] Plastic film printing is the process that various patterns, characters and marks are printed on the surface of plastic film through specific printing process, and the main use is to provide the packaging appearance of product with beautiful appearance and information transmission function, in the commercial field, exquisite plastic film printing packaging can attract the attention of consumers, improve the brand image and recognition of product, thereby promoting product sales, at the same time, product description, method of use and ingredient table information printed on plastic film also facilitate consumers to understand and use the product, play a very key bridge role in commercial circulation link.

[0004] At present, plastic film printing is printed by conveying plastic film to the printing machine through the conveyor belt, but the tension of plastic film cannot be controlled in the conveying process, leading to printing error of part of plastic film printing, in the prior art, a counterweight is added to one end of tension roller, and the pulling force on plastic film is increased by increasing the weight of counterweight, but in actual use, the tension of film needs to be dynamically adjusted according to actual situation, the counterweight has a certain weight, and the counterweight cannot accurately adjust the tension according to actual situation. UTILITY MODEL CONTENTS

[0005] In order to make up for the above shortcomings, the utility model provides a tension adjusting mechanism for plastic film printing, which aims at improving the problem that the counterweight cannot accurately adjust the tension according to actual situation in the prior art.

[0006] In order to achieve the above object, the utility model discloses the following technical scheme: a kind of tension adjusting mechanism for plastic film printing, including workbench, the top front and rear sides both ends of the workbench are fixedly connected with fixed plate, multiple the side of the fixed plate is rotatably connected with corresponding two cylinders one, the front end left and right sides of the workbench are fixedly connected with extension plate, the adjacent side front end of two the extension plate is rotatably connected with same unwinding cylinder, the adjacent side of two the extension plate is equipped with sliding slot, the inner bottom of two the sliding slot is fixedly connected with telescopic link one, the other end of two the telescopic link one is fixedly connected with sliding block, the adjacent side of two the sliding block is fixedly connected with clamping plate, the top of the clamping plate is rotatably connected with cylinder two, the top of the workbench is provided with mounting mechanism, and the mounting mechanism is used to replace installation different printing template.

[0007] As further description of the above technical solution:

[0008] The mounting mechanism includes U-shaped frame, the bottom of the U-shaped frame is fixedly connected with the top left and right sides of the workbench, the inner top wall left and right sides of the U-shaped frame are fixedly connected with telescopic link two, the other end of two the telescopic link two is fixedly connected with same horizontal plate, the bottom front and rear sides of the horizontal plate are equipped with moving slot, the inner two ends of two the moving slot are slidably connected with moving block, the bottom of multiple the moving block is fixedly connected with connecting plate, the bottom front and rear sides of the horizontal plate are fixedly connected with limit plate, the adjacent side of two the limit plate is equipped with limit slot, and the opposite side of two the limit slot is rotatably connected with limit bolt.

[0009] As further description of the above technical solution:

[0010] The rear end of the workbench is fixedly connected with support, and the rear side of the support is rotatably connected with winding cylinder.

[0011] As further description of the above technical solution:

[0012] The right rear end of the workbench is fixedly connected with switch, and the switch is electrically connected with telescopic link one and telescopic link two respectively.

[0013] As further description of the above technical solution:

[0014] The inner front and rear sides of two the sliding slot are equipped with sliding groove, and the front and rear sides of two the sliding block are fixedly connected with sliding block, and multiple the sliding block is slidably connected with the inner corresponding sliding groove.

[0015] As further description of the above technical solution:

[0016] The right side of the U-shaped frame is equipped with observation window, and the right side of the observation window is fixedly connected with sealing frame.

[0017] As a further description of the above technical solutions:

[0018] The top of the workbench is fixedly connected with a base plate, and the front and rear sides of the base plate are designed to be inclined.

[0019] As a further description of the above technical solutions:

[0020] The outer wall of each of the plurality of limiting bolts is slidably connected with a gasket, and one side of each of the plurality of gaskets is attached to one side of the corresponding limiting plate.

[0021] The utility model has the advantages of the following:

[0022] 1. In the utility model, the plastic film roll is installed on the unwinding drum, the film is sequentially transmitted and supported and guided by the rollers on the fixed plate, in the transmission process, the telescopic rod one pushes the sliding block and the clamping plate to drive the roller two to adjust the tension, when the film tension is too large, the roller two is pressed down to compress the telescopic rod one to balance the tension, when the tension is too small, the roller two is lifted up to increase the tension under the extension of the telescopic rod one, and the tension adjustment in the film transmission process is realized.

[0023] 2. In the utility model, the component is placed at a proper position below the horizontal plate, the limiting bolt is operated to rotate and move in the limiting groove, the moving block is pushed to move towards or away from each other in the moving groove, and the connecting plate is synchronously moved to realize the flexible adjustment of the position of the connecting plate according to different sizes of the printing plate, when reaching the proper position, the limiting bolt is rotated to penetrate the limiting groove to fix the connecting plate, so that the installation and fixation of the printing plate are achieved. BRIEF DESCRIPTION OF DRAWINGS

[0024] Figure 1 A perspective view of a tension adjusting mechanism for plastic film printing is provided for the utility model;

[0025] Figure 2 A structure side view of a tension adjusting mechanism for plastic film printing is provided for the utility model;

[0026] Figure 3 A partial structure schematic view of a tension adjusting mechanism for plastic film printing is provided for the utility model;

[0027] Figure 4 A structure sectional view of a tension adjusting mechanism for plastic film printing is provided for the utility model;

[0028] Figure 5 A structure split view of a tension adjusting mechanism for plastic film printing is provided for the utility model.

[0029] Legend:

[0030] 1, workbench; 2, mounting mechanism; 201, U-shaped frame; 202, telescopic rod two; 203, cross plate; 204, moving groove; 205, moving block; 206, connecting plate; 207, limiting plate; 208, limiting groove; 209, limiting bolt; 3, fixed plate; 4, roller one; 5, extension plate; 6, unwinding drum; 7, sliding groove; 8, telescopic rod one; 9, sliding block; 10, clamping plate; 11, roller two; 12, support; 13, winding drum; 14, switch; 15, sliding groove; 16, sliding block; 17, observation window; 18, sealing frame; 19, pad plate; 20, gasket. DETAILED DESCRIPTION

[0031] The technical solutions in the embodiments of the present application will be clearly and completely described below with reference to the drawings in the embodiments of the present application. Obviously, the described embodiments are only part of the embodiments of the present application, rather than all the embodiments. Based on the embodiments in the present application, all other embodiments obtained by those skilled in the art without creative labor fall within the scope of protection of the present application.

[0032] Reference Figure 1 , Figure 2 and Figure 3The utility model provides a kind of embodiment: a kind of tension adjusting mechanism for plastic film printing, including workbench 1, workbench 1 can be as the basis support platform of whole mechanism, provide stable mounting position for other components the top front and rear side both ends of the workbench 1 are fixedly connected with fixed plate 3, fixed plate 3 can be firmly fixed on workbench 1, provide the connecting basis for subsequent components multiple The side of the fixed plate 3 is equally spaced rotary connection with corresponding two cylinder one 4, cylinder one 4 can make plastic film smoothly roll on its surface, realize the transmission direction of film the front end of the workbench 1 is fixedly connected with extension plate 5, extension plate 5 can expand the space of the front end of workbench 1, facilitate the installation other components two The front end of adjacent side of the extension plate 5 is rotary connection with same unwinding cylinder 6, unwinding cylinder 6 can place plastic film roll, and it can freely rotate, facilitate film expansion two The adjacent side of the extension plate 5 is equipped with sliding groove 7, sliding groove 7 provides track for the movement of other components two The inner side bottom of the sliding groove 7 is fixedly connected with telescopic rod one 8, telescopic rod one 8 can be telescopic according to demand, adjust own length two The other end of the telescopic rod one 8 is fixedly connected with sliding block 9, sliding block 9 can move in sliding groove 7 along with the telescopic of telescopic rod one 8 Two The adjacent side of the sliding block 9 is fixedly connected with clamping plate 10, clamping plate 10 can be used to fix relevant components or auxiliary adjust film tension The top of the clamping plate 10 is rotary connection with cylinder two 11, cylinder two 11 can reduce the friction between film and clamping plate 10 when contact with film, and play a key role in tension adjusting process The top of the workbench 1 is provided with mounting mechanism 2, the mounting mechanism 2 is used to replace the installation different printing template, can satisfy multiple printing needs The rear end of the workbench 1 is fixedly connected with support 12, support 12 can be stably supported in the rear end of workbench 1 The rear side of the support 12 is rotary connection with winding cylinder 13, winding cylinder 13 can be wound up after printing plastic film is collected.

[0033] Referring to Figure 4 and Figure 5The mounting mechanism 2 comprises a U-shaped frame 201, the bottom of the U-shaped frame 201 is fixedly connected to the top of the left and right sides of the workbench 1 respectively, the U-shaped frame 201 can build the overall frame structure of the mounting mechanism 2, and provide a stable mounting environment for internal components, the inner side top wall of the U-shaped frame 201 is fixedly connected with a telescopic rod two 202 on the left and right sides, the telescopic rod two 202 can be telescopic in the vertical direction, and the height position of the component connected therewith can be adjusted, the other end of the telescopic rod two 202 is fixedly connected with a same horizontal plate 203, the horizontal plate 203 can be used as a bearing platform of other components, and facilitates the installation and layout of subsequent components, the bottom of the horizontal plate 203 is provided with a moving groove 204 on the front and back sides, the moving groove 204 provides a defined path direction for the movement of a moving block 205, the inner ends of the two moving grooves 204 are slidably connected with the moving block 205, the moving block 205 can smoothly slide left and right in the moving groove 204, and the horizontal position of the moving block 205 is changed, the bottom of the moving block 205 is fixedly connected with a connecting plate 206, the connecting plate 206 can move along with the movement of the moving block 205, and is used for contacting and fixing an object to be installed, the bottom of the horizontal plate 203 is fixedly connected with a limiting plate 207 on the front and back sides, the limiting plate 207 can limit other components in the transverse direction, and prevent excessive deviation, the adjacent side of the limiting plate 207 is provided with a limiting groove 208, the limiting groove 208 provides a space range for the rotation and movement of a limiting bolt 209, the two ends of the side away from each other of the limiting groove 208 are rotatably connected with the limiting bolt 209, the limiting bolt 209 can push or pull the component associated therewith by rotating in the limiting groove 208, and precise position adjustment is realized, the outer wall of the limiting bolt 209 is slidably connected with a gasket 20, the gasket 20 can increase the contact area between the limiting bolt 209 and the limiting plate 207, and reduce friction and abrasion, one side of the gasket 20 is attached to one side of the corresponding limiting plate 207, so that the gasket 20 can stably play a role between the limiting plate 207 and the limiting bolt 209, and the stability and reliability of the whole mounting mechanism 2 are enhanced.

[0034] Referring to Figure 1 , Figure 2 and Figure 3The right side of the workbench 1 is fixedly connected with a switch 14, which can be used as one of the control components of the whole mechanism, facilitating the operator to control the equipment, and the switch 14 is electrically connected with the telescopic rod one 8 and the telescopic rod two 202 respectively, so that the telescopic action of the telescopic rod one 8 and the telescopic rod two 202 can be controlled through the switch 14, and the position adjustment of the related components is realized. The inner front and rear sides of the two sliding grooves 7 are provided with sliding grooves 15, which can provide accurate sliding tracks for the sliding blocks 16 and ensure the stability of the sliding blocks 9 when moving in the sliding grooves 7. The front and rear sides of the two sliding blocks 9 are fixedly connected with the sliding blocks 16, and the sliding blocks 16 cooperate with the sliding grooves 15 to limit the sliding blocks 9 to move only in the direction of the sliding grooves 15, avoiding deviation or shaking. The right side of the U-shaped frame 201 is provided with an observation window 17, which facilitates the operator to observe the working condition inside the mounting mechanism 2 and timely find possible problems. The right side of the observation window 17 is fixedly connected with a sealing frame 18, which can effectively prevent dust and other impurities from entering the inside of the U-shaped frame 201 through the observation window 17, protecting the cleanliness and normal operation of the internal components. The top of the workbench 1 is fixedly connected with a pad 19, which can provide buffering and support for the objects placed on the workbench 1. The front and rear sides of the pad 19 are designed to be inclined, which is conducive to the placement of objects on the workbench 1.

[0035] Working principle: when performing plastic film printing operation, first install the plastic film roll on the unwinding drum 6, and then the film will pass through multiple rollers one 4 in sequence, which are equidistantly connected to the fixed plate 3, providing support and guidance for the transmission of the film, so that the film can run smoothly along the predetermined path. In the transmission process of the film, the sliding block 9 and the clamping plate 10 and the roller two 11 thereon play a key role in tension adjustment. The telescopic rod one 8 can adjust its length according to the set tension requirement, thereby driving the sliding block 9 to move up and down in the sliding groove 7. When the film passes through the roller two 11, if the film tension is too large, the roller two 11 moves downward, causing the clamping plate 10 to drive the sliding block 9 to move downward along the sliding groove 7, at this time the telescopic rod one 8 is compressed, and the elastic resistance of the telescopic rod one 8 balances part of the tension of the film, reducing the tension of the film. Conversely, if the film tension is too small, the roller two 11 will lift the film upward under the extension of the telescopic rod one 8, increasing the tension of the film, which can adjust the tension of the film in the transmission process.

[0036] When the printing plate needs to be installed, the component is first placed at a proper position under the horizontal plate 203, then the limiting bolt 209 is operated to rotate and move in the limiting groove 208, and the moving block 205 is pushed to move towards or away from each other in the moving groove 204, when the moving block 205 moves towards each other, the connecting plate 206 is driven to move synchronously, so that the plurality of connecting plates 206 are adjusted in position according to printing plates of different sizes, when reaching the proper position, the limiting bolt 209 is rotated to pass through the limiting groove 208 to fix the connecting plate 206.

[0037] Finally, it should be noted that: the above only for the preferred embodiments of the present application, and not for limiting the present application, although the foregoing detailed description of the present application is made with reference to the foregoing embodiments, for those skilled in the art, it still can be modified, or part of the technical features of the equivalent replacement, within the spirit and principles of the present application, any modification, equivalent replacement, improvement, etc., should be included within the scope of the present application.

Claims

1. A tension adjusting mechanism for plastic film printing, comprising a worktable (1), characterized in that: The top of the workbench (1) is fixedly connected with a fixed plate (3) at both ends, a plurality of fixed plates (3) are rotatably connected with two corresponding rollers (4) on one side at equal intervals, the front end of the workbench (1) is fixedly connected with an extension plate (5) on both sides, the same unwinding roller (6) is rotatably connected with the front end of the adjacent side of the two extension plates (5), the adjacent side of the two extension plates (5) is provided with a sliding groove (7), the inner bottom of the two sliding grooves (7) is fixedly connected with a telescopic rod (8), the other end of the two telescopic rods (8) is fixedly connected with a sliding block (9), the adjacent side of the two sliding blocks (9) is fixedly connected with a clamping plate (10), the top of the clamping plate (10) is rotatably connected with a roller (11), and the top of the workbench (1) is provided with a mounting mechanism (2).

2. The tension adjusting mechanism for plastic film printing according to claim 1, characterized in that: The mounting mechanism (2) comprises a U-shaped frame (201), the bottom of the U-shaped frame (201) is fixedly connected with the top of the workbench (1) on both sides, the inner top wall of the U-shaped frame (201) is fixedly connected with a telescopic rod (202) on both sides, the other end of the two telescopic rods (202) is fixedly connected with the same horizontal plate (203), the bottom of the horizontal plate (203) is provided with a moving slot (204) on both sides, the inner ends of the two moving slots (204) are slidably connected with a moving block (205), the bottom of the plurality of moving blocks (205) is fixedly connected with a connecting plate (206), the bottom of the horizontal plate (203) is fixedly connected with a limiting plate (207) on both sides, the adjacent side of the two limiting plates (207) is provided with a limiting slot (208), and the opposite side of the two limiting slots (208) is rotatably connected with a limiting bolt (209).

3. The tension adjusting mechanism for plastic film printing according to claim 1, characterized in that: The rear end of the workbench (1) is fixedly connected with a support (12), and the rear side of the support (12) is rotatably connected with a winding roller (13).

4. The tension adjusting mechanism for plastic film printing according to claim 1, characterized in that: The rear end of the workbench (1) is fixedly connected with a switch (14), and the switch (14) is electrically connected with the telescopic rod (8) and the telescopic rod (202).

5. The tension adjusting mechanism for plastic film printing according to claim 1, characterized in that: The inner front and rear sides of the two sliding grooves (7) are provided with a sliding groove (15), the front and rear sides of the two sliding blocks (9) are fixedly connected with a sliding block (16), and a plurality of sliding blocks (16) are slidably connected with the inner sides of the corresponding sliding grooves (15).

6. The tension adjusting mechanism for plastic film printing according to claim 2, characterized in that: The right side of the U-shaped frame (201) is provided with an observation window (17), and the right side of the observation window (17) is fixedly connected with a sealing frame (18).

7. The tension adjusting mechanism for plastic film printing according to claim 1, characterized in that: The top of the workbench (1) is fixedly connected with a pad (19), and the front and rear sides of the pad (19) are designed to be inclined.

8. The tension adjusting mechanism for plastic film printing according to claim 2, characterized in that: The outer walls of the plurality of limiting bolts (209) are slidably connected with a gasket (20), and the side of the plurality of gaskets (20) is attached to the side of the corresponding limiting plate (207).

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