Tension control device for plastic film production

Abstract

The utility model provides a tension control device for plastic film production. The tension control device comprises a base, a lifting roller and a soft cushion. A mounting plate is arranged on the upper side of the base and connected with the base through a plurality of supporting rods. Two outer strip-shaped holes and an inner strip-shaped hole formed between the two outer strip-shaped holes are formed in the mounting seat; the lifting roller is arranged in the inner strip-shaped hole and is connected with a lifting driving component; the soft cushion is arranged on the upper side of the mounting plate and extends to the position between the base and the mounting plate through the two outer strip-shaped holes, and an elastic driving component is connected to the end of the soft cushion and used for pulling the end of the soft cushion downwards, so that the soft cushion is in a straightened state. In actual use, the height of the lifting roller is controlled through the lifting driving component, the radian of the soft cushion can be changed, and therefore stress is applied from the lower side of the plastic film, and the tension of the plastic film is changed. According to the tension control device for plastic film production, the tension control range can be widened, so that the product percent of pass is increased, and the production cost is reduced.

Description

TECHNICAL FIELD

[0001] The application belongs to the technical field of plastic film manufacturing, and particularly relates to a tension control device for plastic film production. BACKGROUND

[0002] Plastic film is a material widely used in packaging, agriculture, construction, electronics and other fields, and the control of tension in its production process is a key link to ensure product quality. The production of plastic film usually includes extrusion, stretching, cooling, winding and other processes, and the stability of tension control directly affects the thickness uniformity, surface flatness, mechanical properties and winding quality of the plastic film.

[0003] In the prior art, the tension of the plastic film is usually controlled by moving the winding equipment and changing the distance between the winding equipment and the working area to avoid problems such as uneven stretching, wrinkling, breaking and uneven curling of the plastic film.

[0004] The inventor found that the movement of the winding equipment is limited by the ground space and interfered by the surrounding equipment, causing technical problems such as difficulty in moving the winding equipment and small tension control range. CONTENT OF THE INVENTION

[0005] The application provides a tension control device for plastic film production, which aims to improve the tension control range, thereby improving the product pass rate and reducing production costs.

[0006] To achieve the above-mentioned purpose, the technical solution adopted by the application is:

[0007] A tension control device for plastic film production is provided, comprising:

[0008] a base for being fixed on the ground below the plastic film; the upper side of the base has a mounting plate, and the mounting plate is connected to the base through a plurality of supporting rods; the mounting plate has two outer strip-shaped holes arranged side by side in the horizontal direction, and an inner strip-shaped hole arranged between the two outer strip-shaped holes;

[0009] a lifting roller slidingly arranged in the inner strip-shaped hole in the up-down direction, and the axial direction of the lifting roller is parallel to the horizontal direction; the lifting roller is drivingly connected with a lifting driving member for driving the lifting roller to move in the up-down direction; and

[0010] a soft pad arranged on the upper side of the mounting plate, and the two ends of the soft pad respectively extend to between the base and the mounting plate through the two outer strip-shaped holes; the end of the soft pad is provided with an elastic driving member between the mounting plate or the base, so as to pull down the end of the soft pad and make the soft pad in a straightened state.

[0011] In a possible implementation manner, the lifting driving member comprises:

[0012] a transmission plate slidingly arranged between the base and the mounting plate in the up-down direction and having a linear driving member connected therewith for driving the transmission plate to move in the up-down direction; and

[0013] two transmission arms fixedly connected to two ends of the transmission plate respectively and extending upwards;

[0014] wherein the two ends of the lifting roller are connected to the extending ends of the two transmission arms respectively, so that the lifting roller moves synchronously when the linear driving member drives the transmission plate to move in the up-down direction.

[0015] In a possible implementation, the mounting plate further has two through holes arranged on two sides of the inner strip-shaped hole in the length direction of the inner strip-shaped hole, and the two transmission arms are slidingly inserted into the two through holes in the up-down direction respectively;

[0016] wherein each through hole has a sunken groove between the through hole and the inner strip-shaped hole, the sunken groove is arranged on the upper side of the mounting plate and penetrates in the length direction of the inner strip-shaped hole to communicate with the through hole and the inner strip-shaped hole; and the lifting roller further comprises:

[0017] two connecting rods coaxially arranged at the two ends of the lifting roller and rotatably connected to the two transmission arms respectively;

[0018] When the lifting roller moves with the transmission plate in the up-down direction, the two connecting rods are adapted to be embedded in the two sunken grooves respectively.

[0019] In a possible implementation, the linear driving member comprises:

[0020] two swing arms arranged side by side on the lower side of the transmission plate in the horizontal direction and hingedly connected to the lower side of the lifting plate in the horizontal direction, and the hinge axes of the swing arms are perpendicular to the arrangement direction of the two swing arms; the swing end of each swing arm is hingedly connected to a sliding seat, the sliding seat is slidingly connected to the upper side of the base in the arrangement direction of the two swing arms, and the sliding seat is fixedly provided with a transmission nut parallel to the sliding direction of the sliding seat; and

[0021] a bidirectional screw rotatably arranged between the base and the mounting plate, the axial direction of the bidirectional screw is parallel to the arrangement direction of the two swing arms, and the bidirectional screw is drivingly connected to a rotating motor for driving the bidirectional screw to rotate;

[0022] wherein the bidirectional screw has two thread parts with opposite thread directions, the two thread parts are threadedly connected to the two transmission nuts respectively, so that the two sliding seats move synchronously in the opposite direction or in the opposite direction when the bidirectional screw rotates.

[0023] In a possible implementation, the sliding seat has a mounting hole suitable for the bidirectional screw rod to pass through, and a receiving groove is formed in the outer side surface of the sliding seat and coaxially arranged with the mounting hole;

[0024] The transmission nut is fixedly embedded in the receiving groove and coaxially arranged with the mounting hole.

[0025] In a possible implementation, the upper side surface of the base is fixedly provided with two guide rails, and the two sliding seats are respectively slidably connected with the two guide rails.

[0026] In a possible implementation, the elastic driving member comprises:

[0027] A sliding plate is slidably connected to the lower side surface of the mounting plate along the arrangement direction of the two outer strip-shaped holes, located between the two outer strip-shaped holes, and fixedly connected with the end of the soft pad; and

[0028] An elastic element is fixedly arranged on the mounting plate and connected with the sliding plate, so as to drive the sliding plate to move away from the outer strip-shaped hole on the same side.

[0029] In a possible implementation, the lower side surface of the mounting plate is fixedly connected with a guide shaft, the axial direction of the guide shaft is parallel to the arrangement direction of the two outer strip-shaped holes, and the sliding plate is slidably connected to the guide shaft;

[0030] The elastic element is a spring sleeved on the guide shaft, the spring is located on the side of the sliding plate away from the outer strip-shaped hole on the same side, and the two ends of the spring are respectively connected with the mounting plate and the sliding plate.

[0031] In a possible implementation, a rotating roller is arranged in each outer strip-shaped hole, the rotating roller is rotatably connected with the inner wall of the outer strip-shaped hole, and the outer peripheral wall is abutted with the inner side surface of the soft pad.

[0032] In a possible implementation, a filling pad is fixedly arranged on the inner wall of each outer strip-shaped hole.

[0033] The filling pad is located on the side of the rotating roller away from the soft pad and abuts against the rotating roller.

[0034] In the embodiment, the lifting driving member can drive the lifting roller to move in the up-down direction, so that the soft pad is arched or flat, so that the surface of the plastic film is arched to different degrees when passing through the area, and the control of the tension of the plastic film is realized.

[0035] The plastic film production tension control device provided by the embodiment can improve the tension control range, thereby improving the product qualification rate and reducing the production cost. BRIEF DESCRIPTION OF DRAWINGS

[0036] In order to more clearly illustrate the technical solutions in the embodiments of the present application, the drawings needed to be used in the embodiments or prior art description will be briefly introduced as follows. Obviously, the drawings in the following description are only some embodiments of the present application, and other drawings can be obtained by those skilled in the art without creative labor.

[0037] Figure 1 The plastic film production tension control device provided by the embodiment is shown in the perspective view.

[0038] Figure 2 The side view of the plastic film production tension control device provided by the embodiment is shown in the perspective view. Figure 1

[0039] The cross-sectional view of the plastic film production tension control device provided by the embodiment along the A-A line in the perspective view is shown in the perspective view. Figure 3 Figure 2 The local enlarged view of the plastic film production tension control device provided by the embodiment at the circle B in the perspective view is shown in the perspective view.

[0040] Figure 4 Figure 3 The local enlarged view of the plastic film production tension control device provided by the embodiment at the circle B in the perspective view is shown in the perspective view.

[0041] Figure 5 The perspective view of the lifting driving member used by the embodiment of the present application is shown in the perspective view.

[0042] Figure 6 The perspective view of the sliding seat and the transmission nut used by the embodiment of the present application in the perspective view is shown in the perspective view.

[0043] Figure 7 The local enlarged view of the elastic driving member used by the embodiment of the present application is shown in the perspective view.

[0044] Figure 8 The cross-sectional view of the base used by the embodiment of the present application is shown in the perspective view.

[0045] The reference signs are explained as follows: 1, base; 11, mounting plate; 111, outer strip-shaped hole; 112, inner strip-shaped hole; 113, through hole; 114, sunken groove; 115, guide shaft; 12, support rod; 13, guide rail; 2, lifting roller; 21, connecting rod; 3, soft pad; 4, lifting driving member; 41, transmission plate; 42, transmission arm; 5, elastic driving member; 51, sliding plate; 52, elastic element; 6, linear driving member; 61, swing arm; 62, bidirectional screw; 621, rotating motor; 7, sliding seat; 71, mounting hole; 72, accommodating groove; 8, transmission nut; 9, rotating roller; 10, filling pad. DETAILED DESCRIPTION​​

[0046] In order to make the technical problems to be solved, technical solutions and beneficial effects of the present application clearer, the present application will be further described in detail below in conjunction with the drawings and embodiments. It should be understood that the specific embodiments described herein are only intended to explain the present application, and not to limit the present application.

[0047] It should be noted that when an element is referred to as being "fixed to" or "disposed on" another element, it can be directly on the other element or indirectly on the other element. When an element is referred to as being "connected to" another element, it can be directly connected to the other element or indirectly connected to the other element.

[0048] It should be understood that the terms "length", "width", "upper", "lower", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer" and the like indicate the orientation or positional relationship based on the orientation or positional relationship shown in the drawings, and are only for the purpose of facilitating the description of the present application and simplifying the description, and do not indicate or imply that the device or element referred to must have a particular orientation, be constructed and operated in a particular orientation, and therefore cannot be understood as limiting the present application.

[0049] In addition, the terms "first", "second" are only for descriptive purposes and cannot be understood as indicating or implying relative importance or implicitly indicating the number of the technical features indicated. Therefore, the features defined with "first", "second" can explicitly or implicitly include one or more of the features. In the description of the present application, the meaning of "a plurality of" is two or more, unless otherwise specifically limited.

[0050] Please refer to Figures 1 to 8 , the tension control device for plastic film production provided by the present application will be described. The tension control device for plastic film production provided by the present application comprises a base 1, a lifting roller 2 and a soft pad 3.

[0051] The base 1 is used to be fixed on the ground under the lower side of the plastic film; the upper side of the base 1 has a mounting plate 11, and the mounting plate 11 is connected with the base 1 through a plurality of supporting rods 12.

[0052] The mounting plate 11 has two outer strip-shaped holes 111 arranged side by side in the horizontal direction, and an inner strip-shaped hole 112 arranged between the two outer strip-shaped holes 111; wherein the length direction of the outer strip-shaped hole 111 and the length direction of the inner strip-shaped hole 112 are arranged in parallel.

[0053] The lifting roller 2 is slidingly arranged in the inner strip-shaped hole 112 in the up-down direction and has an axial direction parallel to the horizontal direction; in actual design, the axial direction of the lifting roller 2 is parallel to the length direction of the inner strip-shaped hole 112, and the lifting roller 2 is drivingly connected with a lifting driving member 4 for driving the lifting roller 2 to move in the up-down direction.

[0054] The soft pad 3 is arranged on the upper side of the mounting plate 11 and extends out between the base 1 and the mounting plate 11 through the two outer strip-shaped holes 111 respectively; the soft pad 3 has an elastic driving member 5 between the end portion and the mounting plate 11 or the base 1 for pulling the end portion of the soft pad 3 downward to make the soft pad 3 in a straightened state.

[0055] It should be noted that when the lifting roller 2 moves upward and drives the soft pad 3 to arch upward, the elastic driving member 5 will be affected by the related force to have an elastic energy storage phenomenon.

[0056] In the embodiment, the lifting driving member 4 can drive the lifting roller 2 to move in the up-down direction to make the soft pad 3 arch, or the soft pad 3 is flat under the action of the elastic driving member 5, so that the plastic film has different degrees of arching when passing through this area, thereby realizing the control of the tension of the plastic film.

[0057] Compared with the prior art, the tension control device for plastic film production provided by the embodiment can improve the tension control range, thereby improving the product qualification rate and reducing the production cost.

[0058] In some embodiments, as shown in Figure 2 The lifting driving member 4 includes a transmission plate 41 and two transmission arms 42.

[0059] The transmission plate 41 is slidingly arranged between the base 1 and the mounting plate 11 in the up-down direction and is drivingly connected with a linear driving member 6 for driving the transmission plate 41 to move in the up-down direction.

[0060] The two transmission arms 42 are fixedly connected to the two ends of the transmission plate 41 respectively and extend toward the upper side.

[0061] In actual combination, the two ends of the lifting roller 2 are connected with the extension ends of the two transmission arms 42 respectively, so that when the linear driving member 6 drives the transmission plate 41 to move in the up-down direction, the lifting roller 2 moves synchronously.

[0062] In some embodiments, as shown in FIGS. Figure 5 and Figure 8 The mounting plate 11 further has two through holes 113, the two through holes 113 are arranged on the two sides of the inner strip-shaped hole 112 in the length direction of the inner strip-shaped hole 112, and the two transmission arms 42 are slidingly inserted into the two through holes 113 in the up-down direction respectively.

[0063] Each through hole 113 has a sunken groove 114 between the through hole 113 and the inner strip-shaped hole 112, the sunken groove 114 is arranged on the upper side of the mounting plate 11 and penetrates along the length direction of the inner strip-shaped hole 112 to communicate with the corresponding through hole 113 and the inner strip-shaped hole 112.

[0064] Based on this, the lifting roller 2 further comprises two connecting rods 21, which are coaxially arranged at the two ends of the lifting roller 2 and are respectively rotatably connected with the two transmission arms 42.

[0065] When the lifting roller 2 moves along the up-down direction with the transmission plate 41, the two connecting rods 21 are adapted to be respectively embedded in the two sunken grooves 114 to ensure the height of the upper edge of the lifting roller 2, so that the plastic film passing through the area of the lifting roller 2 is kept in a horizontal state.

[0066] In some embodiments, as shown in Figure 2 , Figure 3 and Figure 5 , the linear driving member 6 comprises two swing arms 61 and a bidirectional screw rod 62.

[0067] The two swing arms 61 are arranged side by side in the horizontal direction on the lower side of the transmission plate 41, and are both hingedly connected with the lower side of the lifting plate in the horizontal direction, and the hinge shaft of the swing arm 61 is perpendicular to the arrangement direction of the two swing arms 61.

[0068] The swing end of each swing arm 61 is hingedly connected with a sliding seat 7, the sliding seat 7 is slidingly connected with the upper side of the base 1 in the arrangement direction of the two swing arms 61, and a transmission nut 8 is fixedly arranged on the sliding seat 7 and has an axis parallel to the sliding direction of the sliding seat 7.

[0069] The bidirectional screw rod 62 is rotatably arranged between the base 1 and the mounting plate 11, has an axis parallel to the arrangement direction of the two swing arms 61, and is drivingly connected with a rotating motor 621 for driving the rotation of the bidirectional screw rod 62.

[0070] The bidirectional screw rod 62 has two thread parts with opposite screw directions, and the two thread parts are respectively threadedly connected with the two transmission nuts 8, so that when the bidirectional screw rod 62 rotates, the two sliding seats 7 move synchronously towards or away from each other.

[0071] In some embodiments, as shown in Figure 6 , the sliding seat 7 has a mounting hole 71 adapted for the bidirectional screw rod 62 to pass through, and a receiving groove 72 is arranged on the outer side of the sliding seat 7 and coaxially arranged with the mounting hole 71.

[0072] The transmission nut 8 is fixedly embedded in the receiving groove 72 and coaxially arranged with the mounting hole 71.

[0073] In some embodiments, as shown in Figure 2As shown, the upper side of the base 1 is fixedly provided with two guide rails 13, and the two sliding seats 7 are respectively slidably connected with the two guide rails 13, so as to limit the sliding direction of the sliding seat 7.

[0074] In some embodiments, as shown in Figure 4 and Figure 7 As shown, the elastic driving member 5 comprises a sliding plate 51 and an elastic element 52.

[0075] The sliding plate 51 is slidably connected to the lower side of the mounting plate 11 along the arrangement direction of the two outer strip-shaped holes 111, and is located between the two outer strip-shaped holes 111, and the sliding plate 51 is fixedly connected with the end of the soft pad 3.

[0076] The elastic element 52 is fixedly arranged on the mounting plate 11 and connected with the sliding plate 51, so as to drive the sliding plate 51 to move away from the same side of the outer strip-shaped hole 111.

[0077] In some embodiments, as shown in Figure 7 The lower side of the mounting plate 11 is fixedly connected with a guide shaft 115, the axial direction of the guide shaft 115 is parallel to the arrangement direction of the two outer strip-shaped holes 111, and the sliding plate 51 is slidably connected to the guide shaft 115.

[0078] Based on this, the aforementioned elastic element 52 is a spring sleeved on the guide shaft 115, the spring is located on the side of the sliding plate 51 facing the same side of the outer strip-shaped hole 111, and the two ends of the spring are respectively connected with the mounting plate 11 and the sliding plate 51.

[0079] In some embodiments, as shown in Figure 4 Each outer strip-shaped hole 111 is provided with a rotating roller 9, the rotating roller 9 is rotatably connected with the inner wall of the outer strip-shaped hole 111, and the outer peripheral wall is abutted with the inner side of the soft pad 3, so as to avoid the direct frictional contact between the soft pad 3 and the inner wall of the outer strip-shaped hole 111, and reduce the wear of the inner surface of the soft pad 3.

[0080] In some embodiments, as shown in Figure 4 The inner wall of each outer strip-shaped hole 111 is fixedly provided with a filling pad 10; after actual installation, the filling pad 10 is located on the side of the rotating roller 9 away from the soft pad 3 inserted into the outer strip-shaped hole 111, and abuts against the rotating roller 9, so as to prevent the additional pulling of the filling pad 10 caused by the loosening of the rotating roller 9.

[0081] The above is only the preferred embodiment of the present application, and does not limit the present application, any modification, equivalent replacement and improvement made within the spirit and principle of the present application shall be included in the protection scope of the present application.

Claims

1. A tension control device for plastic film production, characterized by, The utility model relates to a plastic film fixing device, which comprises: a base for fixing on the ground under the lower side of the plastic film; the upper side of the base is provided with a mounting plate, and the mounting plate is connected with the base through a plurality of supporting rods; the mounting plate is provided with two outer strip-shaped holes arranged side by side in the horizontal direction and an inner strip-shaped hole arranged between the two outer strip-shaped holes; a lifting roller slidingly arranged in the inner strip-shaped hole in the up-down direction and having an axial direction parallel to the horizontal direction; the lifting roller is drivingly connected with a lifting driving member for driving the lifting roller to move in the up-down direction; and a soft pad arranged on the upper side of the mounting plate and having two ends respectively extending to the base and the mounting plate through the two outer strip-shaped holes; the soft pad is provided with elastic driving members between the ends and the mounting plate or the base for pulling the ends of the soft pad downward to make the soft pad in a straightened state.

2. The tension control device for plastic film production as claimed in claim 1, wherein The lifting driving member comprises: a transmission plate slidingly arranged between the base and the mounting plate in the up-down direction and drivingly connected with a linear driving member for driving the transmission plate to move in the up-down direction; and two transmission arms respectively fixedly connected at two ends of the transmission plate and extending upward; wherein the two ends of the lifting roller are connected with the extending ends of the two transmission arms respectively, so that when the linear driving member drives the transmission plate to move in the up-down direction, the lifting roller moves synchronously.

3. The tension control device for plastic film production as claimed in claim 2, wherein The mounting plate is further provided with two through holes arranged at two sides of the inner strip-shaped hole in the length direction of the inner strip-shaped hole, and the two transmission arms are slidingly inserted into the two through holes in the up-down direction respectively; wherein each through hole is provided with a sunken groove between the through hole and the inner strip-shaped hole, the sunken groove is arranged on the upper side of the mounting plate and penetrates in the length direction of the inner strip-shaped hole to communicate with the through hole and the inner strip-shaped hole; the lifting roller further comprises: two connecting rods coaxially arranged at two ends of the lifting roller and respectively rotatably connected with the two transmission arms; when the lifting roller moves with the transmission plate in the up-down direction, the two connecting rods are adapted to be respectively embedded into the two sunken grooves.

4. The tension control device for plastic film production as claimed in claim 2, wherein The linear driving member comprises: two swing arms arranged side by side in the horizontal direction on the lower side of the transmission plate and hingedly connected with the lower side of the lifting plate in the horizontal direction, and the hinge axes of the swing arms are perpendicular to the arrangement direction of the two swing arms; the swing end of each swing arm is hingedly connected with a sliding seat, the sliding seat is slidingly connected with the upper side of the base in the arrangement direction of the two swing arms, and the sliding seat is fixedly provided with a transmission nut having an axial direction parallel to the sliding direction of the sliding seat; and a bidirectional screw rod rotatably arranged between the base and the mounting plate, having an axial direction parallel to the arrangement direction of the two swing arms, and drivingly connected with a rotating motor for driving the bidirectional screw rod to rotate; wherein the bidirectional screw rod is provided with two thread parts having opposite screw directions, the two thread parts are respectively threadedly connected with the two transmission nuts, so that when the bidirectional screw rod rotates, the two sliding seats synchronously move towards each other or move away from each other.

5. The tension control device for plastic film production as claimed in claim 4, wherein The sliding seat is provided with a mounting hole suitable for the bidirectional screw rod to pass through, and a containing groove is arranged on the outer side surface of the sliding seat coaxially with the mounting hole; The transmission nut is fixedly embedded in the containing groove, and is coaxially arranged with the mounting hole.

6. The tension control device for plastic film production as claimed in claim 4, wherein The upper side surface of the base is fixedly provided with two guide rails, and the two sliding seats are respectively slidably connected with the two guide rails.

7. The tension control device for plastic film production as claimed in claim 1, wherein The elastic driving member comprises: A sliding plate is slidably connected to the lower side surface of the mounting plate along the arrangement direction of the two outer strip-shaped holes, is located between the two outer strip-shaped holes, and is fixedly connected with the end of the soft pad; and An elastic element is fixedly arranged on the mounting plate and connected with the sliding plate, so as to drive the sliding plate to move away from the outer strip-shaped hole on the same side.

8. The tension control device for plastic film production as claimed in claim 7, wherein The lower side surface of the mounting plate is fixedly connected with a guide shaft, the axial direction of the guide shaft is parallel to the arrangement direction of the two outer strip-shaped holes, and the sliding plate is slidably connected to the guide shaft; The elastic element is a spring sleeved on the guide shaft, the spring is located on the side of the sliding plate away from the outer strip-shaped hole on the same side, and the two ends of the spring are respectively connected with the mounting plate and the sliding plate.

9. The tension control device for plastic film production as claimed in claim 1, wherein A rotating roller is arranged in each outer strip-shaped hole, the rotating roller is rotatably connected with the inner wall of the outer strip-shaped hole, and the outer peripheral wall is abutted with the inner side surface of the soft pad.

10. The tension control device for plastic film production as claimed in claim 9, wherein A filling pad is fixedly arranged on the inner wall of each outer strip-shaped hole; The filling pad is located on the side of the rotating roller away from the soft pad, and abuts against the rotating roller.

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