Plastic film and plastic film preparation process

By designing a plastic film preparation device including a support plate, a horizontal shaft frame and an electromagnet, the problem of plastic film leveling is solved, and efficient improvement of the quality of membrane cylinder leveling and winding is achieved.

CN119099124AInactive Publication Date: 2024-12-10何淑梅
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Patent Information

Application Number
CN202411225700.0
Authority / Receiving Office
CN · China
Patent Type
Applications(China)
Current Assignee / Owner
Filing Date
2024-09-03
Publication Date
2024-12-10
Estimated Expiration
Not applicable · inactive patent

AI Technical Summary

Technical Problem

Plastic film needs to be leveled before winding to avoid unevenness affecting the quality of rolling, but it is difficult for the prior art to efficiently level the plastic film.

Method used

A plastic film preparation device is designed, including supporting plates, horizontal shaft frames, clamps, limiting wheels and electromagnets fixed to the upper end of the leg frame. The cooling plastic is made by combining the horizontal support frame and the spring. The membrane cylinder is tensioned and flattened during the sleeve slip, forming a flat state, and is adapted to the membrane cylinder of different sizes through electromagnets and bidirectional screws.

Benefits of technology

It effectively avoids wrinkles in the plastic film cylinder, improves the leveling efficiency and winding quality, ensures the flatness of the plastic film, and facilitates high-quality rolling.

✦ Generated by Eureka AI based on patent content.

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Abstract

The invention relates to the field of plastic films, in particular to a plastic film and a plastic film preparation process thereof.The process comprises the following steps that S1, raw materials are subjected to mixing, filtering and blow molding, and a plastic film cylinder is prepared; s2, the cooled plastic film barrel slides through a transverse supporting frame in a sleeving mode from top to bottom, and leveling is conducted; and S3, the leveled plastic film barrel is wound. The plastic film preparation device comprises two supporting plates fixed to the two sides of the upper end of the supporting leg frame, a transverse shaft frame is fixed to the upper ends of the two supporting plates, two clamping plates are rotationally arranged on the transverse shaft frame in a front-back symmetrical mode, a transverse supporting frame is arranged between the two clamping plates, and tension springs I are arranged between the upper ends of the two clamping plates and the transverse shaft frame. The lower ends of the two clamping plates oppositely abut against the middle of the transverse supporting frame, and therefore the transverse supporting frame is elastically limited between the two clamping plates. By using the plastic film preparation device, the plastic film barrel can be leveled, and the winding quality is guaranteed.
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Description

Technical Field

[0001] The invention relates to the field of plastic films, in particular to a plastic film and a preparation process thereof. Background Art

[0002] Most thermoplastics can be blown to produce blown film. Blown film is made by extruding the plastic into a thin tube, then inflating the plastic with compressed air while it is hot, cooling it to shape it, and finally rolling it up.

[0003] The plastic film needs to be leveled before it is rolled up. The leveling process keeps the formed plastic film flat so that it can be rolled up easily and avoid affecting the quality of the rolling due to the unevenness of the plastic film. Summary of the invention

[0004] The purpose of the present invention is to provide a plastic film and a plastic film preparation process thereof. By using a plastic film preparation device, the plastic film cylinder can be flattened to ensure the winding quality.

[0005] A plastic film preparation device comprises two support plates fixed on both sides of the upper end of a leg frame, a transverse axis frame is fixed on the upper ends of the two support plates, two clamping plates are symmetrically rotated on the transverse axis frame, a transverse support frame is provided between the two clamping plates, and a tension spring I is provided between the upper ends of the two clamping plates and the transverse axis frame, so that the lower ends of the two clamping plates are relatively pressed against the middle part of the transverse support frame, thereby elastically limiting the transverse support frame between the two clamping plates. When in use, the cooled plastic film cylinder is slid from top to bottom over the transverse support frame, so that the plastic film cylinder is transversely tensioned when passing through the transverse support frame, thereby flattening the plastic film cylinder.

[0006] The transverse support frame includes an intermediate plate between two clamping plates, the upper end of the intermediate plate has two limit wheels that rotate symmetrically in the front-rear direction, two cross bars are horizontally penetrated through the intermediate plate, and two frames are connected to the two cross bars.

[0007] The lower ends of the two frames are both provided with rotating plates, the lower ends of the two rotating plates are both provided with supporting rods, and tension springs II are provided between the upper ends of the two rotating plates and the corresponding frames.

[0008] Electromagnets are symmetrically connected to the two ends of the transverse axis frame, and the two electromagnets are used to magnetically attract the two frames so that the two frames slide on the two cross bars.

[0009] Edges are arranged at both ends of the limiting wheel for axially limiting the clamping plate in contact with the limiting wheel.

[0010] A bidirectional screw is arranged on the transverse axis frame for transverse rotation, and two electromagnets are respectively threadedly connected to the two ends of the bidirectional screw.

[0011] The lower ends of the two support plates are connected to a seat frame, a transmission wheel is rotatably passed through the seat frame, a support shaft is passed through the transmission wheel for limited sliding, cone heads are fixed at the opposite ends of the two support shafts, limit rings are arranged on the two cone heads, and a spring I is arranged between the cone head and the transmission wheel;

[0012] An auxiliary roller is rotated at the lower end between the two supporting plates, and springs II are arranged between the two seat frames and the corresponding supporting plates to make the two cone heads close to the auxiliary roller.

[0013] The plastic film preparation process using the preparation device comprises the following steps:

[0014] S1, mixing, filtering and blow molding the raw materials to obtain a plastic film cylinder;

[0015] S2, slide the cooled plastic film tube from top to bottom over the horizontal support frame to level it;

[0016] S3, rolling up the flattened plastic film tube.

[0017] A plastic film is prepared by using the preparation process. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] Figure 1 and Figure 2 It is a schematic diagram of the overall structure of a plastic film preparation device;

[0019] Figure 3 It is a front view structural schematic diagram of a plastic film preparation device;

[0020] Figure 4 It is a schematic cross-sectional structural diagram of a plastic film preparation device;

[0021] Figure 5 It is a schematic diagram of the structure of the outrigger frame and the cross-axis frame;

[0022] Figure 6 It is a schematic diagram of the structure of the horizontal axis frame and the clamping plate;

[0023] Figure 7 It is a structural diagram of the horizontal support frame;

[0024] Figure 8 It is a structural diagram of the framework;

[0025] Fig. 9 and Fig.10 It is a structural diagram of the seat frame and the support shaft.

[0026] In the figure:

[0027] Leg support 101; support plate 102; auxiliary roller 103; horizontal axis frame 104; bidirectional screw 105; electromagnet 106;

[0028] Clamp 201; tension spring I 202;

[0029] Middle plate 301; cross bar 302; frame 303; limiting wheel 304; rotating plate 305; support rod 306; tension spring II 307;

[0030] Seat frame 401; spring II 402; support shaft 403; cone head 404; limit ring 405; spring I 406; transmission wheel 407. DETAILED DESCRIPTION

[0031] like Figure 1-10 As shown, the plastic film preparation device is described in detail:

[0032] A plastic film preparation device comprises two support plates 102 fixed on both sides of the upper end of a leg frame 101, a transverse axis frame 104 is fixed on the upper ends of the two support plates 102, two clamping plates 201 are symmetrically rotated on the transverse axis frame 104, a transverse support frame is provided between the two clamping plates 201, and a tension spring Ⅰ202 is provided between the upper ends of the two clamping plates 201 and the transverse axis frame 104, so that the lower ends of the two clamping plates 201 are relatively pressed against the middle part of the transverse support frame, thereby elastically limiting the transverse support frame between the two clamping plates 201. When in use, the cooled plastic film cylinder is slid from top to bottom over the transverse support frame, so that the plastic film cylinder is transversely tensioned when passing through the transverse support frame, thereby flattening the plastic film cylinder.

[0033] The leg frame 101 is used to support the ground, and the transverse axis frame 104 is horizontally located at the upper end of the device through two support plates 102. The lower ends of the two clamping plates 201 are pressed against the transverse support frame by the elastic force of the tension spring I 202, and the transverse support frame is elastically limited between the two clamping plates 201. When in use, the cooled plastic film cylinder is slid from top to bottom over the transverse support frame, so that the plastic film cylinder is horizontally tensioned when passing through the transverse support frame, so as to flatten the plastic film cylinder and avoid wrinkles in the plastic film cylinder, thereby affecting the winding quality of the plastic film cylinder;

[0034] Moreover, this method of allowing the transverse support frame to pass through the inside of the plastic film tube and tensioning and leveling the plastic film tube as it slides past improves the leveling efficiency while ensuring the leveling effect.

[0035] like Figure 1-10 As shown:

[0036] The transverse support frame includes a middle plate 301 located between two clamping plates 201. The upper end of the middle plate 301 has two limit wheels 304 that rotate symmetrically in the front-to-back direction. Two cross bars 302 are horizontally penetrated on the middle plate 301. Two frames 303 are connected to the two cross bars 302.

[0037] When the lower ends of the two clamping plates 201 are pressed against the middle plate 301 by the elastic force of the tension spring Ⅰ202, the two clamping plates 201 form a V-shaped state, and when the horizontal support frame falls due to its own gravity, the two limiting wheels 304 fall to the inner side surfaces of the two clamping plates 201 respectively, thereby forming an elastic limit for the horizontal support frame. When in use, the plastic film cylinder passes through the horizontal axis frame 104 from the upper end and then slides over the horizontal support frame, that is, the plastic film cylinder covers the middle plate 301, the two limiting wheels 304, the two cross bars 302, and the two frames 303, and slides downward. In this process, the two frames 303 press the plastic film cylinder horizontally, so that the plastic film cylinder is in a tensioned and flat state;

[0038] The two limiting wheels 304 rotate on the middle plate 301, so that the plastic film can pass through between the clamping plate 201 and the limiting wheels 304 more easily;

[0039] The upper ends of the two support rods 306 are both provided with inclined rods for facilitating the installation of the plastic film tube.

[0040] like Figure 1-10 As shown:

[0041] A rotating plate 305 is rotatably mounted at the lower end of each of the two frames 303 , a support rod 306 is rotatably mounted at the lower end of each of the two rotating plates 305 , and a tension spring II 307 is disposed between the upper end of each of the two rotating plates 305 and the corresponding frame 303 .

[0042] Due to the existence of the two limiting wheels 304, a certain space is occupied in the front and rear directions, so that the plastic film tube cannot be flattened and completely aligned to a double-layer single state by only tensioning and flattening the plastic film tube through the two frames 303; therefore, a rotating plate 305 is provided at the lower end of the frame 303, and a support rod 306 extends downward from the rotating plate 305. When the tension of the tension spring II 307 is used, the support rod 306 is located at the lower part away from the two limiting wheels 304, and the plastic film tube is laterally tensioned again inside the plastic film tube, so that the front and rear sides of the plastic film tube are both flat, and can be rolled up to form a double-layer single state, thereby ensuring the rolling quality;

[0043] The upper end of the support rod 306 is provided with an elbow, and the outer edge is provided with a rounded corner, and the overall thickness is small, so that the plastic film tube is conveniently tensioned to a single state of a double-layered film for winding.

[0044] like Figure 1-10 As shown:

[0045] Electromagnets 106 are symmetrically connected to both ends of the transverse axis frame 104 . The two electromagnets 106 are used to magnetically attract the two frames 303 so that the two frames 303 slide on the two cross bars 302 .

[0046] In order to make the device adapt to plastic film tubes of different sizes, two electromagnets 106 are provided. When in use, after the two electromagnets 106 are energized, the two frames 303 are magnetically attracted at the same time, so that the two frames 303 slide on the two cross bars 302 and slide away from each other at the same time. Due to the existence of the plastic film tube, the electromagnet 106 and the frame 303 are always kept in a non-contact state, thereby ensuring that the plastic film tube passes smoothly and at the same time changing the distance between the two frames 303, so as to achieve the purpose of making the device adapt to the leveling of plastic film tubes of different sizes.

[0047] Further:

[0048] The two ends of the limiting wheel 304 are provided with edges for axially limiting the clamping plate 201 in contact with it.

[0049] Due to the presence of the electromagnet 106, the entire transverse support frame is subjected to transverse magnetic force, and edges are set at both ends of the limiting wheel 304 to form axial limit with the clamping plate 201, thereby avoiding lateral movement of the transverse support frame, thereby avoiding lateral movement of the plastic film tube, and then affecting the winding of the plastic film tube.

[0050] Further:

[0051] A bidirectional screw 105 is rotatably disposed on the transverse axis frame 104 , and two electromagnets 106 are respectively threadedly connected to the two ends of the bidirectional screw 105 .

[0052] By rotating the bidirectional screw 105, the two electromagnets 106 can be threadedly driven to move laterally closer or farther, thereby controlling the distance between the two electromagnets 106, and then controlling the distance between the electromagnet 106 and the frame 303, ensuring that the magnetic attraction between the electromagnet 106 and the frame 303 is moderate when the device is leveling plastic film tubes of different sizes.

[0053] like Figure 1-10 As shown:

[0054] The lower ends of the two support plates 102 are connected to a seat frame 401, a transmission wheel 407 is rotatably passed through the seat frame 401, a support shaft 403 is passed through the transmission wheel 407 for limited sliding, cone heads 404 are fixed to the opposite ends of the two support shafts 403, limiting rings 405 are provided on the two cone heads 404, and a spring I 406 is provided between the cone head 404 and the transmission wheel 407.

[0055] When winding the flattened and double-layered single-sheet plastic film tube, first push the two cone heads 404 to overcome the elastic force of the spring I 406 and slide toward the seat frame 401, then place the winding inner tube between the two cone heads 404, loosen the cone heads 404, insert the two cone heads 404 into the two ends of the winding inner tube respectively, and tighten the end of the winding inner tube through the limit ring 405, thereby fixing the winding inner tube between the two cone heads 404;

[0056] Then the lower end of the plastic film cylinder is wound and fixed on the winding inner cylinder, and then the first motor installed on the seat frame 401 is started to drive the transmission wheel 407, so that the transmission wheel 407 drives the support shaft 403 to rotate, and then drives the winding inner cylinder to rotate, so as to wind the plastic film cylinder.

[0057] like Figure 1-10 As shown:

[0058] An auxiliary roller 103 is rotated at the lower end between the two support plates 102 , and a spring II 402 is provided between the two seat frames 401 and the corresponding support plates 102 to make the two cone heads 404 close to the auxiliary roller 103 .

[0059] Through the setting of the auxiliary roller 103, after the winding inner cylinder is installed between the two cone heads 404, the winding inner cylinder will press against the auxiliary roller 103, and the gap between the two is located directly below the transverse support frame, thereby the plastic film cylinder in a double-layer single state is evenly aligned by the transverse support frame and enters between the winding inner cylinder and the auxiliary roller 103 in a vertical state;

[0060] As the plastic film tube is wound on the winding inner tube, the overall size of the winding inner tube will increase, and then cooperate with the auxiliary roller 103 to form a winding inner tube to drive the two seats 401 to squeeze the spring II 402, so that the plastic film tube is always wound in a vertical state, avoiding the plastic film tube from tilting as the diameter of the winding inner tube increases, causing the plastic film tube and the support rod 306 to be squeezed and damaged in the front and back states.

[0061] like Figure 1-10 As shown:

[0062] The plastic film preparation process using the preparation device comprises the following steps:

[0063] S1, mixing, filtering and blow molding the raw materials to obtain a plastic film cylinder;

[0064] S2, slide the cooled plastic film tube from top to bottom over the horizontal support frame to level it;

[0065] S3, rolling up the flattened plastic film tube.

[0066] A plastic film is prepared by using the preparation process.

Claims

1. A plastic film preparation device, Features: The invention comprises two support plates (102) fixed on both sides of the upper end of the leg frame (101), a transverse axis frame (104) being fixed on the upper ends of the two support plates (102), two clamping plates (201) being symmetrically rotated front and back on the transverse axis frame (104), a transverse support frame being provided between the two clamping plates (201), and a tension spring I (202) being provided between the upper ends of the two clamping plates (201) and the transverse axis frame (104), so that the lower ends of the two clamping plates (201) are relatively pressed against the middle part of the transverse support frame, thereby elastically limiting the transverse support frame between the two clamping plates (201). When in use, the cooled plastic film cylinder is slid from top to bottom over the transverse support frame, so that the plastic film cylinder is transversely tensioned when passing through the transverse support frame, thereby flattening the plastic film cylinder.

2. A plastic film preparation device according to claim 1, Features: The transverse support frame comprises an intermediate plate (301) located between two clamping plates (201), the upper end of the intermediate plate (301) is provided with two limit wheels (304) which can rotate symmetrically in the front-rear direction, two cross bars (302) are transversely penetrated on the intermediate plate (301), and two frames (303) are connected to the two cross bars (302).

3. A plastic film preparation device according to claim 2, Features: The lower ends of the two frames (303) are both rotatably provided with rotating plates (305), the lower ends of the two rotating plates (305) are both rotatably provided with support rods (306), and tension springs II (307) are both provided between the upper ends of the two rotating plates (305) and the corresponding frames (303).

4. A plastic film preparation device according to claim 3, Features: Electromagnets (106) are symmetrically connected to the two ends of the transverse axis frame (104), and the two electromagnets (106) are used to magnetically attract the two frames (303) so that the two frames (303) slide on the two cross bars (302).

5. A plastic film preparation device according to claim 4, Features: Edges are provided at both ends of the limiting wheel (304) for axially limiting the clamping plate (201) abutting against it.

6. A plastic film preparation device according to claim 4, Features: A bidirectional screw rod (105) is disposed on the transverse axis frame (104) to rotate transversely, and two electromagnets (106) are respectively threadedly connected to the two ends of the bidirectional screw rod (105).

7. A plastic film preparation device according to claim 1, Features: The lower ends of the two support plates (102) are connected to a seat frame (401), a transmission wheel (407) is rotatably passed through the seat frame (401), a support shaft (403) is passed through the transmission wheel (407) for limited sliding, cone heads (404) are fixed at opposite ends of the two support shafts (403), limiting rings (405) are provided on the two cone heads (404), and a spring I (406) is provided between the cone head (404) and the transmission wheel (407).

8. A plastic film preparation device according to claim 7, Features: An auxiliary roller (103) is rotatably arranged at the lower end between the two support plates (102), and a spring II (402) is arranged between the two seat frames (401) and the corresponding support plates (102) to make the two cone heads (404) close to the auxiliary roller (103).

9. A process for preparing a plastic film using the preparation device according to any one of claims 1 to 8, Features: The process includes the following steps: S1, mixing, filtering and blow molding the raw materials to obtain a plastic film cylinder; S2, slide the cooled plastic film tube from top to bottom over the horizontal support frame to level it; S3, rolling up the flattened plastic film tube.

10. A plastic film, Features: It is prepared using the preparation process described in claim 9.