Bidirectional film stretching device

Abstract

The utility model provides a film two-way stretching device which comprises two guide rods arranged in parallel, a pair of push plates is arranged between the two guide rods, and the outer side edges of the push plates are parallel to the guide rods. A plurality of sliding blocks are arranged on the guide rods in a sliding mode, a connecting block is arranged between every two adjacent sliding blocks, the connecting blocks are located between the guide rods and the push plate, the connecting blocks are connected with the sliding blocks on the two sides through hinge plates, the two ends of each hinge plate are hinged to the corresponding connecting block and the corresponding sliding block respectively, and the hinge axis is perpendicular to the plane where the two guide rods are located. The two push plates move synchronously in the direction perpendicular to the two guide rods and are used for pushing the connecting block. The device can synchronously stretch the film in the transverse direction and the longitudinal direction.

Description

Technical Field

[0001] The utility model belongs to the technical field of film stretching, and particularly relates to a film bidirectional stretching device. Background Art

[0002] The existing stretching method of the film is mainly based on the cast film process. During stretching, the film is heated to raise the temperature of the film to an appropriate temperature range. Through a stretching machine, under the action of external force, it is stretched longitudinally or transversely in sequence, so that the molecular chains or crystal surfaces are arranged in order. After cooling, the stretched film can be obtained. The existing stretching device can only achieve stretching in one direction at a time, and cannot perform transverse and longitudinal stretching at the same time. Utility Model Content

[0003] In order to solve the deficiencies of the prior art, the utility model provides a film biaxial stretching device, which can simultaneously stretch the film in the transverse direction and the longitudinal direction.

[0004] In order to achieve the purpose of this utility model, the following scheme is proposed:

[0005] A film bidirectional stretching device comprises: two parallel guide rods, a pair of push plates are arranged between the two guide rods, and the outer sides of the push plates are parallel to the guide rods.

[0006] A plurality of sliding blocks are slidably provided on the guide rod, and connecting blocks are provided between adjacent sliding blocks. The connecting blocks are located between the guide rod and the push plate, and the connecting blocks are connected to the sliding blocks on both sides through hinged plates. The two ends of the hinged plates are respectively hinged to the connecting blocks and the sliding blocks, and the axis of the hinge is perpendicular to the plane where the two guide rods are located.

[0007] The two push plates are synchronously moved in a direction perpendicular to the two guide rods and are used for pushing the connecting block.

[0008] Film clamps are provided in all directions of the connection blocks for clamping the edges of the films.

[0009] The utility model has the beneficial effects of being able to simultaneously perform transverse and longitudinal stretching processing on the film, and is easy to operate, requiring only moving the push plate. BRIEF DESCRIPTION OF THE DRAWINGS

[0010] The drawings described herein are for illustrative purposes only of selected embodiments and not all possible implementations, and are not intended to limit the scope of the present invention.

[0011] Figure 1 A schematic diagram of the top structure of a preferred embodiment of the present application is shown.

[0012] Figure 2 A schematic diagram of the bottom structure of a preferred embodiment of the present application is shown.

[0013] Figure 3 Shows Figure 2 A partial enlarged view of point A in the middle.

[0014] Figure 4 A schematic diagram of the bottom structure of a preferred embodiment of the present application is shown when the slider is retracted toward the middle of the guide rod.

[0015] Markings in the figure: guide rod-1, push plate-2, slider-3, limit wheel-31, connecting block-4, roller-41, hinged plate-5, film clamp-6, bidirectional screw rod-7, plate-8, slide rail-81. DETAILED DESCRIPTION

[0016] In order to make the purpose, technical solutions and advantages of the embodiments of the utility model clearer, the implementation methods of the utility model are described in detail below in conjunction with the accompanying drawings, but the embodiments described in the utility model are only part of the embodiments of the utility model, rather than all the embodiments.

[0017] like Figures 1 to 4 As shown, a film biaxial stretching device comprises: two parallel guide rods 1, a pair of push plates 2 are arranged between the two guide rods 1, and the outer sides of the push plates 2 are parallel to the guide rods 1. A plurality of sliders 3 are slidably arranged on the guide rods 1, and connecting blocks 4 are arranged between adjacent sliders 3. The connecting blocks 4 are located between the guide rods 1 and the push plates 2, and the connecting blocks 4 are connected to the sliders 3 on both sides through hinge plates 5. The two ends of the hinge plates 5 are respectively hinged to the connecting blocks 4 and the sliders 3, and the axis of the hinge is perpendicular to the plane where the two guide rods 1 are located; the two push plates 2 are synchronously moved in a direction perpendicular to the two guide rods 1, and are used to push the connecting blocks 4; the connecting blocks 4 are all provided with film clamps 6, which are used to clamp the edge of the film.

[0018] When in use, the film clamps 6 on the two guide rods 1 are used to clamp both sides of the film in the width direction, and the length direction of the film is kept in a straight state; the two push plates 2 are synchronously moved outwardly perpendicular to the direction of the two guide rods 1, and the push plates 2 will push the connecting block 4 to move toward the corresponding guide rod 1, and the film clamps 6 will also move therewith, so that the film is stretched along the width direction; during the movement of the connecting block 4, the sliding block 3 will be pushed by the hinged plate 5 to move along the guide rod 1, thereby increasing the distance between the adjacent film clamp 6 brackets, so that the film can be stretched synchronously along the length direction.

[0019] Preferably, the slider 3 located at the middle position on the same guide rod 1 is fixed to the guide rod 1, so that the film can be stretched synchronously from the middle position to both ends in the length direction during stretching.

[0020] Preferably, Figure 3 As shown, a roller 41 is provided at the portion of the connecting block 4 that contacts the push plate 2, so as to utilize rolling contact to replace the sliding friction between the parts, thereby reducing the wear of the parts.

[0021] Preferably, Figure 2 , Figure 4 As shown, the two ends of a bidirectional screw rod 7 pass through the two push plates 2 respectively, the threads at the two ends of the bidirectional screw rod 7 are rotated in opposite directions, the bidirectional screw rod 7 is perpendicular to the guide rods 1 on both sides, and the two push plates 2 can be driven to move synchronously along the length direction of the bidirectional screw rod 7 by rotating the bidirectional screw rod 7, and the moving directions are opposite. The bidirectional screw rod 7 is driven by a motor or rotated manually.

[0022] Preferably, Figure 3 As shown, a pair of limiting wheels 31 are respectively provided on both sides of the slider 3 corresponding to the guide rod 1 , and the limiting wheels 31 are in rolling contact with the side surfaces of the guide rod 1 to improve the smoothness of the slider 3 when moving.

[0023] Preferably, Figure 1 , Figure 2 As shown, a flat plate 8 is provided between the two guide rods 1. The flat plate 8 is located above the push plate 2 and is used for laying the film to facilitate temporary placement of the film when disassembling and installing the film.

[0024] Further preferably, Figure 2 As shown, both ends of the flat plate 8 are provided with slide rails 81 , the slide rails 81 are parallel to the moving direction of the push plate 2 , and both ends of the push plate 2 are slidably arranged on the corresponding slide rails 81 .

[0025] The above is only a preferred embodiment of the utility model, and does not mean that it is the only one or limit the utility model. Those skilled in the art should understand that various changes or equivalent replacements made to the utility model without departing from the scope of the utility model are within the scope of protection of the utility model.

Claims

1. A film biaxial stretching device, characterized in that: It comprises: two guide rods (1) arranged in parallel, a pair of push plates (2) arranged between the two guide rods (1), and the outer sides of the push plates (2) are parallel to the guide rods (1); A plurality of sliding blocks (3) are slidably provided on the guide rod (1), and connecting blocks (4) are provided between adjacent sliding blocks (3). The connecting blocks (4) are located between the guide rod (1) and the push plate (2), and the connecting blocks (4) are connected to the sliding blocks (3) on both sides via hinged plates (5). The two ends of the hinged plates (5) are respectively hinged to the connecting blocks (4) and the sliding blocks (3), and the axis of the hinge is perpendicular to the plane where the two guide rods (1) are located. The two push plates (2) are arranged to move synchronously in a direction perpendicular to the two guide rods (1) and are used to push the connecting block (4); Film clamps (6) are provided in each direction of the connection block (4) for clamping the edge of the film.

2. A film biaxial stretching device according to claim 1, characterized in that: A sliding block (3) located at a middle position on the same guide rod (1) is fixed to the guide rod (1).

3. A film biaxial stretching device according to claim 1, characterized in that: A roller (41) is provided at a position on the connecting block (4) that contacts the push plate (2).

4. A film biaxial stretching device according to claim 1, characterized in that: The two ends of a bidirectional screw rod (7) pass through the two push plates (2) respectively. The threads at the two ends of the bidirectional screw rod (7) rotate in opposite directions. The bidirectional screw rod (7) is perpendicular to the guide rods (1) on both sides.

5. A film biaxial stretching device according to claim 4, characterized in that: The bidirectional screw rod (7) is driven by a motor or rotated manually.

6. A film biaxial stretching device according to claim 1, characterized in that: A pair of limiting wheels (31) are respectively provided on both sides of the slider (3) corresponding to the guide rod (1), and the limiting wheels (31) are in rolling contact with the side surfaces of the guide rod (1).

7. A film biaxial stretching device according to claim 1, characterized in that: A flat plate (8) is provided between the two guide rods (1), and the flat plate (8) is located above the push plate (2).

8. A film biaxial stretching device according to claim 7, characterized in that: Both ends of the flat plate (8) are provided with slide rails (81), the slide rails (81) are parallel to the moving direction of the push plate (2), and both ends of the push plate (2) are slidably arranged on the corresponding slide rails (81).

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