An environmentally friendly thin film material and its production system

By using the combination of the clamping assembly and the heating cooling roller during the film production process, the problems of skewed and uneven thickness of the film are solved, uniform stretching and thickness control of the film are achieved, and production quality is improved.

CN118684985BActive Publication Date: 2025-08-01SI SHUI XIAN HONG DA WEI YE YIN WU YOU XIAN GONG SI
View PDF 1 Cites 0 Cited by

Patent Information

Application Number
CN202410713922.0
Authority / Receiving Office
CN · China
Patent Type
Patents(China)
Current Assignee / Owner
Filing Date
2024-06-04
Publication Date
2025-08-01
Estimated Expiration
2044-06-04

AI Technical Summary

Technical Problem

During the existing film production process, the parallelism of the extrusion rollers is reduced, resulting in the problem that the finished film product is skewed and the thickness is uneven.

Method used

A clamping assembly with a left and right symmetric distribution, including a clamping mechanism with a top and bottom symmetric distribution, is adopted to ensure uniform stretching and thickness control of the blank through the clamping and moving process of three strokes. The combination of heating and cooling rollers is used to ensure uniform thickness of the blank during the transverse widening process.

Benefits of technology

The uniform stretching and thickness control of the film are achieved, the problems of finished products are avoided and the problems of uneven thickness are not uniform, and the production quality of the film is improved.

✦ Generated by Eureka AI based on patent content.

Smart Images

  • Figure CN118684985B_ABST
    Figure CN118684985B_ABST
Patent Text Reader

Abstract

The present invention relates to the technical field of thin film production, specifically an environmentally friendly thin film material and its production system, which comprises components in the following proportions: 75% - 80% of polyvinyl alcohol, 8% - 12% of glycerol, 2% - 4% of mica, 0.5% - 1% of plasticizer, 0.2% - 0.5% of bactericide, and 0.8% - 1.2% of calcium carbonate. For the environmentally friendly thin film material and its production system provided by the invention, when producing the environmentally friendly thin film, the raw materials are first proportioned and solidified, then the solidified raw materials are cut into blanks, and then the blanks are longitudinally stretched in sequence. Then the stretched blanks are sent into the frame, and the clamping assembly moves inside the frame. When the clamping assembly makes the first stroke, the clamping plates on the two pairs of clamping mechanisms on the frame move towards the corners of the blank, clamping both sides of the blank. Then the clamping assembly makes the second stroke, and the two clamping assemblies move the blank inside the frame while the distance between the two clamping assemblies continuously increases, and the clamping plates on the clamping assembly traction the side edges of the blank.
Need to check novelty before this filing date? Find Prior Art

Description

Technical Field

[0001] The present invention relates to the technical field of thin film production, and more specifically to an environmentally friendly thin film material and its production system. Background Art

[0002] Polyvinyl alcohol film is a degradable and environmentally friendly thin film. Due to its low price, oil resistance, solvent resistance, and excellent gas barrier properties, it is widely used in food, pharmaceutical packaging, etc.

[0003] According to the publication (announcement) number CN117165013A, the publication (announcement) date is December 5, 2023. An environmentally friendly thin film material is disclosed, which includes the following components in parts by weight: 80 - 100 parts of polyvinyl alcohol, 10 - 20 parts of glycerol, 5 - 8 parts of mica, 0.5 - 2 parts of nano-carbon powder, 0.5 - 2 parts of calcium carbonate, and 1 - 2 parts of plasticizer. The particle size of the calcium carbonate is 0.01 - 0.1 μm. The degree of polymerization of the polyvinyl alcohol is 1600 - 1800. The glycerol molecules in this environmentally friendly thin film material contain multiple hydroxyl functional groups, and the polyvinyl alcohol molecules also have a large number of hydroxyl groups. As a result, the glycerol molecules can be tightly connected to the polyvinyl alcohol molecules through hydrogen bond interactions, increasing the mutual attraction between the polyvinyl alcohol molecular chains, thereby promoting the combination and cross-linking of the molecular chains, and further increasing the strength, softness, and ductility of the polyvinyl alcohol film. In addition to hydrogen bonds, there are also van der Waals force interactions between the glycerol and polyvinyl alcohol molecules, enhancing the combination between the polyvinyl alcohol and glycerol, and increasing the stability and mechanical properties of the polyvinyl alcohol film.

[0004] In the prior art including the above patent, the thin film needs to go through multiple processes such as formulation, slitting, shaping, and detection during production. Among them, shaping includes longitudinal stretching and transverse widening of the blank cut out. Generally, the work of transverse widening is undertaken by extrusion rollers distributed in parallel. The evenness of the thin film thickness is mainly determined by the parallelism of the extrusion rollers. Once the parallelism of the extrusion rollers decreases, the distances that the two extrusion rollers push the blank to move are different, and the movement path of the blank is likely to deviate from the predetermined path, resulting in the skewness and uneven thickness of the extruded finished product. Summary of the Invention

[0005] The purpose of the present invention is to provide an environmentally friendly thin film material and its production system, aiming to solve the above problems.

[0006] To achieve the above purpose, the present invention provides an environmentally friendly thin film material, which includes the following components in the following proportions: 75% - 80% of polyvinyl alcohol, 8% - 12% of glycerol, 2% - 4% of mica, 0.5% - 1% of plasticizer, 0.2% - 0.5% of bactericide, and 0.8% - 1.2% of calcium carbonate, where:

[0007] The degree of polymerization of the polyvinyl alcohol is 500 to 2000, and the polyvinyl alcohol is one or more of partially saponified polyvinyl alcohol and fully saponified polyvinyl alcohol, wherein the partially saponified polyvinyl alcohol means that the degree of saponification is 85 to 95%.

[0008] A production system for an environmentally friendly thin film material, which is used to produce the above-mentioned environmentally friendly thin film material, includes a frame, and the following are provided on the frame:

[0009] Clamping components symmetrically distributed left and right, the clamping components include clamping mechanisms symmetrically distributed up and down, the clamping mechanisms include a plurality of mounting plates movably installed on the frame, and clamping plates for clamping the sides of the blank are movably arranged on the mounting plates. Among them, the clamping components include the following three strokes:

[0010] The first stroke, the two clamping components approach and the two pairs of clamping mechanisms clamp the sides of the blank;

[0011] The second stroke, the two clamping components move along the blank conveying direction and the distance between them increases;

[0012] The third stroke, the two pairs of clamping mechanisms release the blank and return to the initial position.

[0013] Preferably, a guide plate for pushing the two clamping components to move relative to each other is provided on the frame, and a first inclined surface corresponding to the first stroke, a straight portion corresponding to the second stroke, and a second inclined surface are provided on the guide plate.

[0014] Preferably, a plurality of clamping rollers for extruding the blank are symmetrically provided on the frame. The upper and lower corresponding clamping rollers are a pair, and the distance between multiple pairs of clamping rollers decreases sequentially along the blank conveying direction.

[0015] Preferably, the clamping rollers include heating rollers and cooling rollers. A plurality of the cooling rollers are all facing the central area of the straight portion, and a plurality of the heating rollers are respectively facing the second inclined surface or the connection between the second inclined surface and the straight portion.

[0016] Preferably, a push rod is provided on the clamping plate, a push block for pushing the push rod to approach the blank is provided at the bottom of the guide plate, and a clamping block for embedding the blank is provided on the clamping plate.

[0017] Preferably, a tenon block is provided on the push rod, a guide groove adapted to the tenon block is opened at the bottom of the guide plate, and the tenon block moves along the guide groove so that the position of the clamping block for embedding the blank is adjustable.

[0018] Preferably, the guide groove includes an inclined groove corresponding to the second inclined surface and a straight groove corresponding to the straight portion, and the straight groove is two parallel grooves, and a connecting groove is provided between the two grooves.

[0019] Preferably, a direction guiding block is provided on the mounting plate, and slopes adapted to the first inclined surface and the second inclined surface are provided at two corners of the guiding block.

[0020] Preferably, a rectangular groove for guiding the movement of the mounting plate is formed on the frame, a belt is arranged inside the rectangular groove, and a square connecting rod is arranged between the belt and the mounting plate.

[0021] In the above technical solution, an environmentally friendly film material and its production system provided by the present invention have the following beneficial effects: when producing an environmentally friendly film, first mix and cure raw materials in proportion, then cut the cured raw materials into blanks, and then longitudinally stretch the blanks in sequence. Then, the stretched blanks are sent into the frame, and the clamping assembly moves inside the frame. When the clamping assembly performs the first stroke, the clamping plates on the two pairs of clamping mechanisms on the frame move towards the corners of the blank, clamp both sides of the blank, and then the clamping assembly performs the second stroke. The two clamping assemblies drive the blank to move inside the frame, and at the same time, the distance between the two clamping assemblies continuously increases. The clamping plates on the clamping assembly pull the side edges of the blank, so that the blank is continuously widened. Then, the clamping assembly performs the third stroke, the clamping assembly separates from the blank and gradually returns to the initial position, and the blank that has been widened horizontally leaves the frame and subsequent processes can be carried out. Description of the Drawings

[0022] In order to more clearly illustrate the technical solutions in the embodiments of the present application or the prior art, the following will briefly introduce the drawings required to be used in the embodiments. Obviously, the drawings described below are only some embodiments recorded in the present invention. For those of ordinary skill in the art, other drawings can also be obtained according to these drawings.

[0023] Figure 1 It is the overall structural schematic diagram provided by the embodiment of the present invention;

[0024] Figure 2 It is the structural schematic diagram of the clamping roller provided by the embodiment of the present invention;

[0025] Figure 3 It is the structural schematic diagram of the clamping mechanism provided by the embodiment of the present invention;

[0026] Figure 4 For Figure 3 The enlarged view at A in

[0027] Figure 5 It is the structural schematic diagram of the belt provided by the embodiment of the present invention;

[0028] Figure 6 It is the structural schematic diagram of the guiding plate provided by the embodiment of the present invention;

[0029] Figure 7 ForFigure 6 Enlarged view at B in the figure;

[0030] Figure 8 Schematic structural diagram of the tenon block provided by the embodiment of the present invention;

[0031] Figure 9 Schematic structural diagram of the cross-section of the clamping roller provided by the embodiment of the present invention.

[0032] Explanation of reference numerals:

[0033] 1. Frame; 11. Clamping mechanism; 111. Mounting plate; 112. Clamping plate; 113. Clamping block; 114. Push rod; 115. Tenon block; 116. Connecting rod; 117. Guide block; 12. Guide plate; 121. First inclined surface; 122. Second inclined surface; 123. Straight part; 124. Guide groove; 125. Inclined groove; 126. Straight groove; 127. Connection groove; 128. Push block; 131. Rectangular groove; 132. Belt; 133. Pulley; 134. Clamping roller; 135. Heating roller; 136. Cooling roller. Detailed implementation manners

[0034] In order to enable those skilled in the art to better understand the technical solutions of the present invention, the present invention will be further described in detail below in conjunction with the accompanying drawings.

[0035] Embodiment 1

[0036] An environmentally friendly film material, comprising components in the following proportions: 75% - 80% of polyvinyl alcohol, 8% - 12% of glycerol, 2% - 4% of mica, 0.5% - 1% of plasticizer, 0.2% - 0.5% of bactericide, 0.8% - 1.2% of calcium carbonate, wherein:

[0037] The degree of polymerization of polyvinyl alcohol is 500 - 2000, and the polyvinyl alcohol is one or more of partially alcoholized polyvinyl alcohol and fully alcoholized polyvinyl alcohol. Among them, the partially alcoholized type means that the degree of alcoholysis is 85% - 95%.

[0038] Specifically, the partially alcoholized polyvinyl alcohol in the above embodiment is specifically PVA17 - 88, and the fully alcoholized polyvinyl alcohol is PVA17 - 99 or PVA19 - 99.

[0039] Embodiment 2

[0040] As Figures 1-9 shown, a production system for an environmentally friendly film material, which is used to produce the above-mentioned environmentally friendly film material, includes a frame 1, and the frame 1 is provided with:

[0041] A clamping assembly with left-right symmetric distribution. The clamping assembly includes clamping mechanisms 11 symmetrically distributed up and down. The clamping mechanism 11 includes a plurality of mounting plates 111 movably installed on the frame 1. A clamping plate 112 for clamping the side of the blank is movably arranged on the mounting plate 111. The clamping assembly includes the following three strokes:

[0042] The first stroke: The two clamping assemblies move closer, and the two pairs of clamping mechanisms 11 clamp the sides of the blank.

[0043] The second stroke: The two clamping assemblies move along the blank conveying direction and the distance between them increases.

[0044] The third stroke: The two pairs of clamping mechanisms 11 release the blank and return to the initial position.

[0045] Specifically, when producing an environmental protection film, first, the raw materials are proportionally prepared and cured. Then, the cured raw materials are cut into blanks. Next, the blanks are longitudinally stretched in sequence. Then, the stretched blanks are fed into the frame 1. The clamping assembly moves inside the frame 1. When the clamping assembly performs the first stroke, the clamping plates 112 on the two pairs of clamping mechanisms 11 on the frame 1 move closer to the corners of the blank and clamp both sides of the blank. Then, the clamping assembly performs the second stroke. The two clamping assemblies move the blank inside the frame 1, and at the same time, the distance between the two clamping assemblies continuously increases. The clamping plates 112 on the clamping assembly pull the sides of the blank, making the blank continuously widened. Then, the clamping assembly performs the third stroke. The clamping assembly separates from the blank and gradually returns to the initial position. The blank that has been horizontally widened leaves the frame 1 and subsequent processes can be carried out.

[0046] In the above technical solution, when producing an environmental protection film, first, the raw materials are proportionally prepared and cured. Then, the cured raw materials are cut into blanks. Next, the blanks are longitudinally stretched in sequence. Then, the stretched blanks are fed into the frame 1. The clamping assembly moves inside the frame 1. When the clamping assembly performs the first stroke, the clamping plates 112 on the two pairs of clamping mechanisms 11 on the frame 1 move closer to the corners of the blank and clamp both sides of the blank. Then, the clamping assembly performs the second stroke. The two clamping assemblies move the blank inside the frame 1, and at the same time, the distance between the two clamping assemblies continuously increases. The clamping plates 112 on the clamping assembly pull the sides of the blank, making the blank continuously widened. Then, the clamping assembly performs the third stroke. The clamping assembly separates from the blank and gradually returns to the initial position. The blank that has been horizontally widened leaves the frame 1 and subsequent processes can be carried out.

[0047] As an embodiment further provided by the present invention, a guiding plate 12 for pushing the two clamping assemblies to move relative to each other is arranged on the frame 1. The guiding plate 12 is provided with a first inclined surface 121 corresponding to the first stroke, a straight portion 123 corresponding to the second stroke, and a second inclined surface 122.

[0048] Specifically, when the clamping assembly is performing the first stroke, the mounting plate 111 in the clamping assembly rests on the first inclined surface 121 of the guide plate 12. When the mounting plate 111 moves along the first inclined surface 121, the first inclined surface 121 pushes the mounting plate 111 toward the center of the frame 1, and the clamping plate 112 on the mounting plate 111 gradually moves above or below the blank. Then the mounting plate 111 moves to the straight portion 123 connected to the blood dripping surface, and the clamping plate 112 approaches the blank, and the corresponding two clamping plates 112 on a pair of clamping mechanisms 11 clamp both sides of the blank.

[0049] As another embodiment further provided by the present invention, a plurality of clamping rollers 134 for extruding the billet are symmetrically arranged on the frame 1, and the upper and lower corresponding clamping rollers 134 form a pair, and the spacing between the multiple pairs of clamping rollers 134 decreases successively along the billet conveying direction.

[0050] Specifically, in the process of the clamping assembly moving along the side wall of the guide plate 12, two groups of clamping rollers 134 are distributed above and below to clamp the blank and push the blank to a uniform thickness during the lateral extension process. The spacing between multiple pairs of clamping rollers 134 decreases successively along the blank conveying direction, which can gradually extrude the blank and continuously reduce the thickness of the blank so as to further widen the blank.

[0051] As another embodiment further provided by the present invention, the clamping roller 134 includes a heating roller 135 and a cooling roller 136, and the multiple cooling rollers 136 are all facing the central area of the straight portion 123, and the multiple heating rollers 135 are respectively facing the second inclined surface 122 or the connection between the second inclined surface 122 and the straight portion 123.

[0052] Specifically, when the clamping assembly is about to contact the second inclined surface 122 of the guide plate 12 and moves along the second inclined surface 122, the heating roller 135 heats the blank to facilitate the stretching of the blank. In the process of the clamping assembly moving along the straight portion 123 of the guide plate 12, the distance between the two clamping assemblies remains unchanged. At this time, the cooling roller 136 cools the blank, causing the blank to cool, shrink and become compact, thereby avoiding excessive fluidity caused by the blank being in a high temperature state for a long time, and ensuring that the stretching of the blank proceeds smoothly.

[0053] As another embodiment further provided by the present invention, a push rod 114 is provided on the clamping plate 112, a push block 128 for pushing the push rod 114 toward the blank is provided at the bottom of the guide plate 12, and a clamping block 113 for embedding the blank is provided on the clamping plate 112.

[0054] Specifically, a slope is provided on the side of the clamping roller 134, a spring for pushing the push rod 114 is provided on the mounting plate 111, the push block 128 corresponds to the straight portion 123 and the second inclined surface 122 of the guide plate 12, and a slope is provided at the end of the push block 128.

[0055] Further, when the clamping mechanism 11 moves from the first inclined surface 121 to the straight part 123, the push rod 114 moves along the slope on the push block 128 onto the push block 128. The push block 128 pushes the push rod 114 and the clamping plate 112 to move, causing the clamping plate 112 to approach the blank. The clamping block 113 on the clamping plate 112 is embedded into the blank, so as to better cooperate with the corresponding clamping plate 112 to clamp the corner of the blank.

[0056] As another embodiment further provided by the present invention, a tenon block 115 is provided on the push rod 114, and a guide groove 124 adapted to the tenon block 115 is opened at the bottom of the guide plate 12. The tenon block 115 moves along the guide groove 124 to make the position where the clamping block 113 is embedded into the blank adjustable.

[0057] Specifically, the tenon block 115 is specifically cylindrical.

[0058] Further, when the clamping mechanism 11 enters the second stroke from the first stroke, the tenon block 115 on the push rod 114 also enters the guide groove 124 on the guide plate 12. The guide groove 124 cooperates with the tenon block 115 to drive the clamping plate 112 to move relative to the mounting plate 111, changing the position where the clamping block 113 is embedded into the blank, so that the blank located outside the clamping block 113 and not stretched can participate in stretching, thereby ensuring the strength of the blank after stretching.

[0059] As another embodiment further provided by the present invention, the guide groove 124 includes an inclined groove 125 corresponding to the second inclined surface 122 and a straight groove 126 corresponding to the straight part 123, and the straight groove 126 is two grooves distributed in parallel, and a connecting groove 127 is provided between the two grooves.

[0060] Specifically, a notch is provided on the part of the push block 128 facing the connecting groove 127.

[0061] Further, during the movement of the clamping mechanism 11 along the straight portion 123 of the guiding plate 12, the tenon block 115 on the push plate moves along the straight groove 126. When the tenon block 115 is about to enter the connecting groove 127, the push rod 114 also moves to the notch of the push block 128. At this time, the spring pushes the push block 128 and the clamping plate 112 to move away from the blank. The clamping block 113 on the clamping plate 112 is separated from the blank. At this time, the cooling roller 136 cools the blank. The blank cools and shrinks. The portion of the blank clamped by the clamping block 113 is in a protruding state and gradually abuts against the slope on the side of the cooling roller 136, avoiding excessive shrinkage of the blank. At the same time, the portion of the blank clamped by the clamping block 113 is also released. Then the tenon block 115 moves along the connecting groove 127, and the connecting groove 127 pushes the tenon block 115 to drive the clamping plate 112 to move away from the cooling roller 136, so that more sides of the blank are released. Then the tenon block 115 returns to the straight groove 126 again, and the push rod 114 also contacts the push block 128. The push block 128 pushes the clamping plate 112 towards the blank, and the clamping block 113 on the clamping plate 112 re-embeds into the blank to clamp the blank.

[0062] As another embodiment further provided by the present invention, a direction guiding block 117 is provided on the mounting plate 111, and slopes adapted to the first inclined surface 121 and the second inclined surface 122 are provided at two corners of the guiding block 117.

[0063] Specifically, during the movement of the clamping mechanism 11 along the first inclined surface 121, the slope on the guiding block 117 closely adheres to the first inclined surface 121. During the movement of the clamping mechanism 11 along the straight portion 123, the plane of the guiding block 117 abuts against the straight portion 123. During the movement of the clamping mechanism 11 along the second inclined surface 122, the slope on the other side of the guiding block 117 abuts against the second inclined surface 122. The cooperation between the guiding block 117 and the guiding plate 12 keeps the mounting plates 111 in the two clamping assemblies inside the frame 1 always parallel, so that the clamping plates 112 on the mounting plates 111 can clamp the sides of the blank.

[0064] As another embodiment further provided by the present invention, a rectangular groove 131 for guiding the movement of the mounting plate 111 is provided on the frame 1, a belt 132 is arranged inside the rectangular groove 131, and a square connecting rod 116 is arranged between the belt 132 and the mounting plate 111.

[0065] Specifically, a belt pulley 133 driven by a belt and used to drive the belt 132 to move is arranged inside the frame 1, and the connecting rod 116 is specifically a self-elastic telescopic rod.

[0066] Furthermore, when producing environmentally friendly films, the raw materials are first mixed and solidified in proportion, and then the solidified raw materials are cut into blanks, and then the blanks are longitudinally stretched in sequence, and then the stretched blanks are fed into the frame 1, the pulley 133 drives the belt 132 to move, and the belt 132 drives the clamping assembly to move along the rectangular groove 131 through the connecting rod 116, and the clamping assembly gradually contacts the first inclined surface 121 of the guide plate 12, and the guide block 117 on the clamping assembly abuts against the first inclined surface 121 of the guide plate 12, and the first inclined surface 121 pushes the guide block 117 and the mounting plate 111 toward the machine. The frames 112 and 117 are brought together at the center of the frame 1, the clamping plate 112 on the mounting plate 111 is moved to the corner of the blank, and then the guide block 117 contacts the straight portion 123 of the guide plate 12, and the tenon 115 enters the guide groove 124 so that the guide block 117 is always close to the side wall of the guide plate 12, and the push rod 114 moves along the slope on the push block 128 to the push block 128, and the push block 128 pushes the push rod 114 and the clamping plate 112 to move, so that the clamping plate 112 approaches the blank, and the clamping block 113 on the clamping plate 112 is embedded in the blank so as to better cooperate with the corresponding clamping plate 112 to clamp the corners of the blank.

[0067] The clamping assembly continues to move, and the heating roller 135 heats the blank to increase the ductility of the blank. Then the guide block 117 moves along the second inclined surface 122. The distance between the two clamping assemblies continues to increase, and the blank is also stretched. At the same time, the clamping roller 134 group pushes the blank to a uniform thickness during the lateral extension process. At this time, the tenon block 115 moves along the inclined groove 125 of the guide groove 124.

[0068] Then the guide block 117 contacts the straight portion 123, and the tenon 115 on the push plate moves along the straight groove 126. When the tenon 115 is about to enter the connecting groove 127, the push rod 114 also moves to the notch of the push block 128. At this time, the spring pushes the push block 128 and the clamping plate 112 to move away from the blank. The clamping block 113 on the clamping plate 112 separates from the blank. At this time, the cooling roller 136 cools the blank, and the blank cools and shrinks. The part of the blank clamped by the clamping block 113 is in a protruding state and gradually rests on the slope of the side of the cooling roller 136 to prevent the blank from being excessively pressed. The blank shrinks, and the portion of the blank clamped by the clamp 113 is also released. Then the tenon 115 moves along the connecting groove 127, and the connecting groove 127 pushes the tenon 115 and the clamp 112 to move away from the cooling roller 136, so that more sides of the blank are released. Then the tenon 115 returns to the straight groove 126, and the push rod 114 also contacts the push block 128. The push block 128 pushes the clamp 112 to approach the blank, and the clamp 113 on the clamp 112 is re-embedded in the blank to clamp the blank, and then the lateral widening operation is repeated.

[0069] The clamping assembly continues to move and separates from the guide plate 12. The clamping plate 112 separates from the blank and continues to move along the rectangular groove 131 and gradually returns to the initial position. The blank gradually moves to the outside of the frame 1. At this time, subsequent processes can be performed on the blank.

[0070] Only some exemplary embodiments of the present invention have been described by way of illustration. Undoubtedly, for those of ordinary skill in the art, the described embodiments can be modified in various different ways without departing from the spirit and scope of the present invention. Therefore, the above drawings and description are illustrative in nature and should not be construed as limiting the scope of protection of the claims of the present invention.

Claims

1. A production device for an environmentally friendly thin film material, characterized in that, It includes a frame, on which are provided: Clamping components symmetrically distributed left and right. Each clamping component includes clamping mechanisms symmetrically distributed up and down. Each clamping mechanism includes a plurality of mounting plates movably installed on the frame. On the mounting plates are movably provided clamping plates for clamping the side edges of the blank. The clamping component includes the following three strokes: The first stroke: the two clamping components approach each other and the two pairs of clamping mechanisms clamp the side edges of the blank. The second stroke: the two clamping components move along the blank conveying direction and the distance between them increases. The third stroke: the two pairs of clamping mechanisms release the blank and return to the initial position. On the frame is provided a guiding plate for pushing the two clamping components to move relative to each other. On the guiding plate are provided a first inclined surface corresponding to the first stroke, a straight portion corresponding to the second stroke, and a second inclined surface. Symmetrically arranged on the frame are a plurality of clamping rollers for extruding the blank. The upper and lower corresponding clamping rollers form a pair. The distances between multiple pairs of clamping rollers decrease in sequence along the blank conveying direction. The clamping rollers include heating rollers and cooling rollers. Multiple cooling rollers are all facing the central area of the straight portion. Multiple heating rollers are respectively facing the second inclined surface or the connection between the second inclined surface and the straight portion.

2. The production equipment of an environmentally friendly thin film material according to claim 1, characterized in that, On the clamping plate is provided a push rod. At the bottom of the guiding plate is provided a push block for pushing the push rod to approach the blank. On the clamping plate is provided a clamping block for embedding into the blank.

3. The production equipment of an environmentally friendly thin film material according to claim 2, characterized in that, On the push rod is provided a tenon block. At the bottom of the guiding plate is opened a guide groove adapted to the tenon block. The tenon block moves along the guide groove so that the position of the clamping block for embedding into the blank is adjustable.

4. The production equipment of an environmentally friendly thin film material according to claim 3, characterized in that, The guide groove includes an inclined groove corresponding to the second inclined surface and straight grooves corresponding to the straight portion. The straight grooves are two parallel grooves, and a connecting groove is provided between the two grooves.

5. The production equipment of an environment-friendly thin film material according to claim 1, characterized in that, On the mounting plate is provided a direction guiding block. At two corners of the guiding block are provided slopes respectively adapted to the first inclined surface and the second inclined surface.

6. The production equipment of an environmentally friendly thin film material according to claim 1, characterized in that, On the frame is opened a rectangular groove for guiding the movement of the mounting plate. Inside the rectangular groove is provided a belt. Between the belt and the mounting plate is provided a square connecting rod.

Citation Information

Patent Citations

  • Environment-friendly film material and production process thereof

    CN117165013A