Biaxial stretching device for preparing composite film

Abstract

The utility model belongs to the technical field of two-way stretching for composite membrane preparation, and particularly relates to a two-way stretching device for composite membrane preparation, which comprises a stretching table, two tiltable conveying devices are mounted at the top of the stretching table, and stretching components are mounted on the conveying devices. The stretching assembly comprises a plurality of pressing pieces, a mounting groove and a lifting table. The mounting groove is formed in a conveying belt of the conveying device. The composite film is clamped through the upper pressing block and the lower pressing block, the composite film is gradually stretched in the follow-up movement, a large number of mechanical equipment is omitted, the production cost is further reduced, compared with the prior art, when the pressing pieces operate along the straight interval of the conveying device, no gap is reserved between the pressing pieces, and the production efficiency is improved. Ripples formed by uneven stress on the edge of the composite membrane are avoided, and the stretching effect on the composite membrane is relatively improved.

Description

Technical Field

[0001] The utility model relates to the technical field of biaxial stretching for composite film preparation, in particular to a biaxial stretching device for composite film preparation. Background Art

[0002] Composite film refers to a multi-layer structure film formed by combining various plastics with paper, metal, etc. through lamination, extrusion cladding, co-extrusion, biaxial stretching and other process technologies to form a base material.

[0003] The composite film needs to be stretched in both longitudinal and transverse directions during the production process. However, the existing transverse stretching device fixes the composite film by machine during the process, and the structure is relatively complicated.

[0004] The existing Chinese patent with announcement number CN217777764U discloses a biaxial stretching device for preparing a composite film, including a stretching table, the upper surface of which is rotatably connected to a driving wheel, a guide wheel, and a driven wheel, the surfaces of which are covered with the same conveyor belt, the lower surface of which is fixedly connected to a conveying plate, the lower surface of which is fixedly connected to a motor, the front of which is fixedly connected to a fixing component, the upper surface of which is fixedly connected to a compacting component and a loosening component, and a cooling roller is provided on the right side of the stretching table.

[0005] In view of the above-mentioned and existing related technologies, the inventors believe that the following defects often exist: the device presses the composite film down onto the conveying plate for stretching by fixing rods, and there are certain gaps between the fixing rods. The tension of the composite film at the gaps is weaker than the tension at the fixing rods, which causes waves to form on the edges of the composite film, affecting its quality and requiring improvement; therefore, in view of the above-mentioned problems, a biaxial stretching device for preparing composite films is proposed. Utility Model Content

[0006] In order to make up for the deficiencies of the prior art and solve the above-mentioned technical problems, the utility model provides a biaxial stretching device for preparing a composite film.

[0007] The technical solution adopted by the utility model to solve its technical problems is: a bidirectional stretching device for preparing a composite film described in the utility model comprises a stretching table, two tiltable conveying devices are installed on the top of the stretching table, a stretching assembly is installed on the conveying device, the stretching assembly comprises a plurality of pressing pieces, an installation groove and a lifting platform, the installation groove is opened on the conveyor belt of the conveying device, a plurality of the pressing pieces are installed on the conveyor belt of the conveying device at equal distances, and the side walls of adjacent pressing pieces are sequentially fitted, the pressing piece comprises an upper pressing block and a lower pressing block, the lower pressing block is fixedly connected to the conveyor belt of the conveying device, the installation groove is slidably connected to the upper pressing block, the top of the upper pressing block is fixedly connected with a tension spring, and the top end of the tension spring is fixedly installed on the top of the installation groove, the lifting platform is located directly above the conveying device, and the top of the lifting platform is fixedly connected with an electric push rod, The driving end of the electric push rod is fixedly connected to the conveying device, and the bottom of the lifting platform is fixedly connected with an arc-shaped pressing layer with a notch. The height of the pressing layer is adjusted by the electric push rod according to the thickness of the composite film, thereby controlling the clamping force of the upper pressing block and the lower pressing block. Winding and unwinding devices are respectively installed on both sides of the stretching platform. The winding and unwinding devices belong to the prior art and will not be described again. The composite film is transported horizontally by the winding and unwinding devices, and the conveying device is tilted in an eight-shaped shape, and the notch is moved above the composite film, and the lower pressing block is attached to the bottom surface of the composite film. The conveying device is operated. When the conveying device transports the upper pressing block from the notch, the upper pressing block rises above the composite film due to the tension of the tension spring, and then the upper pressing block moves downward when passing through the pressing layer, and then the composite film is clamped by the upper pressing block and the lower pressing block, and the composite film is gradually stretched in subsequent movements, thereby saving a large amount of mechanical equipment and reducing production costs.

[0008] Preferably, the notch of the pressing layer is located on one side of the feeding direction of the composite film.

[0009] Preferably, a chamfered surface is provided at the notch of the pressing layer.

[0010] Preferably, the top of the upper pressing block is fixedly connected to a mounting frame, and the interior of the mounting frame is rotatably connected to a pressing wheel, and the pressing wheel slides downward along the bevel surface when passing through the pressing layer, so that the upper pressing block gradually moves downward.

[0011] Preferably, four slide grooves are provided on the surface of the stretching table, and an adjustment component is installed at the bottom of the conveying device. The adjustment component includes two sliders, and the sliders are slidably installed inside the slide grooves. By adjusting the positions of the sliders on both sides of the conveying device, the distance between the two conveying devices can be controlled, thereby adjusting the stretching range of the composite film and improving the flexibility of the device.

[0012] Preferably, a lead screw is threadedly connected at the center of the slider, one end of the lead screw is rotatably installed inside the slide groove, a driver is fixedly connected to the side wall of the stretching table, and the driving end of the driver is fixedly connected to the other end of the lead screw, and the position of the slider is adjusted by running the driver to drive the lead screw to rotate.

[0013] Preferably, the adjustment assembly further comprises a rotating column 1 and a rotating column 2, wherein the rotating column 1 and the rotating column 2 are respectively fixedly mounted on two sliding blocks, and the top end of the rotating column 1 is rotatably connected to the conveying device.

[0014] Preferably, the top of the rotating column two is rotatably connected to a sliding seat, and the sliding seat is slidably installed at the bottom of the conveying device. When the inclination position of the conveying device is adjusted, the two sliders slide synchronously, respectively driving the rotating column one and the rotating column two to move along the slide groove, so as to adjust the relative gap of the conveying device. When the inclination of a single conveying device needs to be adjusted, the slider drives the rotating column two to slide and causes the sliding seat to slide at the bottom of the conveying device, thereby causing the conveying device to rotate around the rotating column one to adjust the inclination of the conveying device, and flexibly adjusting the stretching effect according to the width of the composite film.

[0015] The utility model is beneficial in that:

[0016] 1. The utility model clamps the composite film by the upper pressing block and the lower pressing block, and gradually stretches the composite film in the subsequent movement, thereby eliminating a large amount of mechanical equipment and reducing production costs. Compared with the prior art, when the pressing parts run along the straight section of the conveying device, there is no gap between each other, which avoids the formation of ripples due to uneven force on the edge of the composite film, and relatively improves the stretching effect on the composite film.

[0017] 2. The utility model can control the distance between the two conveying devices by adjusting the positions of the sliders on both sides of the conveying device, thereby adjusting the stretching range of the composite film and improving the flexibility of the device. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] In order to more clearly illustrate the embodiments of the utility model or the technical solutions in the prior art, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the utility model. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative labor.

[0019] Figure 1 It is a schematic diagram of the overall structure of the utility model;

[0020] Figure 2 For this utility model Figure 1 Side view;

[0021] Figure 3This is a schematic diagram of the structure of the stretching assembly of the utility model;

[0022] Figure 4 For this utility model Figure 3 A structural diagram of ;

[0023] Figure 5 This is a schematic diagram of the expanded structure of the adjustment component of the utility model.

[0024] In the figure: 1. stretching table; 2. conveying device; 3. stretching assembly; 31. pressing piece; 32. mounting groove; 33. tension spring; 34. electric push rod; 35. pressing layer; 36. mounting frame; 37. pressing wheel; 38. lifting platform; 311. upper pressure block; 312. lower pressure block; 4. slide groove; 5. adjustment assembly; 51. slider; 52. lead screw; 53. rotating column one; 54. rotating column two; 55. sliding seat; 6. drive. DETAILED DESCRIPTION

[0025] The following will be combined with the drawings in the embodiments of the utility model to clearly and completely describe the technical solutions in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments in the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model. Example

[0026] See also Figure 1-4As shown, a biaxial stretching device for preparing a composite film comprises a stretching platform 1, two tiltable conveying devices 2 are installed on the top of the stretching platform 1, a stretching assembly 3 is installed on the conveying device 2, the stretching assembly 3 comprises a plurality of pressing pieces 31, a mounting groove 32 and a lifting platform 38, the mounting groove 32 is opened on the conveying belt of the conveying device 2, a plurality of pressing pieces 31 are equidistantly installed on the conveying belt of the conveying device 2, and the side walls of adjacent pressing pieces 31 are sequentially fitted, and when the pressing pieces 31 run along the straight section of the conveying device 2, there is no gap between each other to avoid uneven force on the edge of the composite film to form corrugations, the pressing piece 31 comprises an upper pressing block 311 and a lower pressing block 312, the lower pressing block 312 is fixedly connected to the conveying belt of the conveying device 2, the mounting groove 32 is slidably connected to the upper pressing block 311, the top of the upper pressing block 311 is fixedly connected to a tension spring 33, and the top end of the tension spring 33 is fixedly installed on the top of the mounting groove 32, the lifting platform 38 is located directly above the conveying device 2, and the lifting platform 38 The top of the lifting platform 38 is fixedly connected with an electric push rod 34, and the driving end of the electric push rod 34 is fixedly connected to the conveying device 2. The bottom of the lifting platform 38 is fixedly connected with an arc-shaped pressing layer 35 with a notch. The height of the pressing layer 35 is adjusted according to the thickness of the composite film by the electric push rod 34, thereby controlling the clamping force of the upper pressing block 311 and the lower pressing block 312. Winding and unwinding devices are respectively installed on both sides of the stretching platform 1. The winding and unwinding devices belong to the prior art and are not described again. The composite film is transported laterally by the winding and unwinding devices, and the conveying device 2 is tilted in an eight-shaped shape, and the notch is moved above the composite film, and the lower pressing block 312 is attached to the bottom surface of the composite film. The conveying device 2 is operated. When the conveying device 2 transports the upper pressing block 311 from the notch, the upper pressing block 311 rises higher than the composite film through the tension of the tension spring 33, and then the upper pressing block 311 moves downward when passing through the pressing layer 35, and then the composite film is clamped by the upper pressing block 311 and the lower pressing block 312, and the composite film is gradually stretched in the subsequent movement.

[0027] The notch of the pressing layer 35 is located on one side of the composite film in the feeding direction.

[0028] The notch of the pressing layer 35 is provided with a chamfered surface.

[0029] The top of the upper pressing block 311 is fixedly connected to a mounting frame 36 , and the interior of the mounting frame 36 is rotatably connected to a pressing wheel 37 . When the pressing wheel 37 passes through the pressing layer 35 , it slides downward along the beveled surface, so that the upper pressing block 311 gradually moves downward. Example

[0030] For comparison with Example 1, please refer to Figure 5As shown, the utility model provides another embodiment, four slide grooves 4 are opened on the surface of the stretching table 1, and an adjustment component 5 is installed at the bottom of the conveying device 2. The adjustment component 5 includes two sliders 51, and the sliders 51 are slidably installed inside the slide grooves 4. By adjusting the positions of the sliders 51 on both sides of the conveying device 2, the distance between the two conveying devices 2 can be controlled, thereby adjusting the stretching range of the composite film and improving the flexibility of the device.

[0031] A lead screw 52 is threadedly connected at the center of the slider 51, and one end of the lead screw 52 is rotatably installed inside the slide groove 4. A driver 6 is fixedly connected to the side wall of the stretching table 1, and the driving end of the driver 6 is fixedly connected to the other end of the lead screw 52. The lead screw 52 is driven to rotate by running the driver 6 to adjust the position of the slider 51.

[0032] The adjustment assembly 5 further includes a rotating column 1 53 and a rotating column 2 54 . The rotating column 1 53 and the rotating column 2 54 are respectively fixedly mounted on the two sliders 51 . The top end of the rotating column 1 53 is rotatably connected to the conveying device 2 .

[0033] The top of the rotating column 54 is rotatably connected to a sliding seat 55, and the sliding seat 55 is slidably installed at the bottom of the conveying device 2. When adjusting the tilt position of the conveying device 2, the two sliders 51 slide synchronously, respectively driving the rotating column 1 53 and the rotating column 2 54 to move along the slide groove 4, so as to adjust the relative gap of the conveying device 2. When the inclination of a single conveying device 2 needs to be adjusted, the slider 51 drives the rotating column 2 54 to slide and causes the sliding seat 55 to slide at the bottom of the conveying device 2, thereby causing the conveying device 2 to rotate around the rotating column 1 53 to adjust the inclination of the conveying device 2, and flexibly adjusting the stretching effect according to the width of the composite film.

[0034] Through the personnel in this field, all the electrical components in this case are connected to their corresponding power supplies through wires, and according to the actual situation, a suitable controller should be selected to be electrically connected to the transmission device 2 and the driver 6 to meet the control requirements. The specific connection and control sequence should refer to the following working principle, and the electrical connection between the electrical components is completed in the working order. The detailed connection means are well-known technologies in this field. The following mainly introduces the working principle and process, and does not explain the electrical control.

[0035] The parts not involved in the device are the same as those in the prior art or can be implemented by using the prior art.

[0036] Working principle: the composite film is transported horizontally by the winding and unwinding equipment, the conveying device 2 is tilted in an eight-shaped shape, and the notch is moved to the top of the composite film, the lower pressure block 312 is attached to the bottom surface of the composite film, and the conveying device 2 is operated. When the conveying device 2 transports the upper pressure block 311 from the notch, the upper pressure block 311 rises higher than the composite film due to the tension of the tension spring 33, and then the upper pressure block 311 moves downward when passing through the pressing layer 35, and then the composite film is clamped by the upper pressure block 311 and the lower pressure block 312, and the composite film is gradually stretched in the subsequent movement.

[0037] When adjusting the tilt position of the conveying device 2, the two sliders 51 slide synchronously, respectively driving the rotating column 1 53 and the rotating column 2 54 to move along the slide groove 4, so as to adjust the relative gap of the conveying device 2. When the inclination of a single conveying device 2 needs to be adjusted, the slider 51 drives the rotating column 2 54 to slide and causes the sliding seat 55 to slide at the bottom of the conveying device 2, thereby causing the conveying device 2 to rotate around the rotating column 1 53 to adjust the inclination of the conveying device 2, and flexibly adjusting the stretching effect according to the width of the composite film.

[0038] In the description of this specification, the description with reference to the terms "one embodiment", "example", "specific example", etc. means that the specific features, structures, materials or characteristics described in conjunction with the embodiment or example are included in at least one embodiment or example of the utility model. In this specification, the schematic representation of the above terms does not necessarily refer to the same embodiment or example. Moreover, the specific features, structures, materials or characteristics described can be combined in any one or more embodiments or examples in a suitable manner.

[0039] The above shows and describes the basic principle, main features and advantages of the utility model. Those skilled in the art should understand that the utility model is not limited by the above embodiments, and the above embodiments and descriptions are only for explaining the principle of the utility model. Without departing from the spirit and scope of the utility model, the utility model may have various changes and improvements, and these changes and improvements fall within the scope of the utility model to be protected.

Claims

1. A biaxial stretching device for preparing a composite film, comprising a stretching table (1), characterized in that: Two tiltable conveying devices (2) are installed on the top of the stretching platform (1). A stretching assembly (3) is installed on the conveying device (2). The stretching assembly (3) includes a plurality of pressing members (31), a mounting groove (32) and a lifting platform (38). The mounting groove (32) is opened on the conveyor belt of the conveying device (2). A plurality of the pressing members (31) are installed on the conveyor belt of the conveying device (2) at equal distances, and the side walls of adjacent pressing members (31) are sequentially abutted. The pressing member (31) includes an upper pressing block (311) and a lower pressing block (312). The lower pressing block (312) is ) is fixedly connected to the conveyor belt of the conveying device (2), the installation groove (32) is slidably connected to the upper pressure block (311), the top of the upper pressure block (311) is fixedly connected to a tension spring (33), and the top of the tension spring (33) is fixedly installed on the top of the installation groove (32), the lifting platform (38) is located directly above the conveying device (2), the top of the lifting platform (38) is fixedly connected to an electric push rod (34), and the driving end of the electric push rod (34) is fixedly connected to the conveying device (2), and the bottom of the lifting platform (38) is fixedly connected to an arc-shaped pressing layer (35) with a notch.

2. The biaxial stretching device for preparing a composite film according to claim 1, characterized in that: The notch of the pressing layer (35) is located on one side of the feeding direction of the composite film.

3. The biaxial stretching device for preparing a composite film according to claim 1, characterized in that: The notch of the pressing layer (35) is provided with a chamfered surface.

4. The biaxial stretching device for preparing a composite film according to claim 1, characterized in that: The top of the upper pressing block (311) is fixedly connected to a mounting frame (36), and the interior of the mounting frame (36) is rotatably connected to a pressing wheel (37).

5. The biaxial stretching device for preparing a composite film according to claim 1, characterized in that: The surface of the stretching table (1) is provided with four slide grooves (4), and the bottom of the conveying device (2) is provided with an adjustment component (5), wherein the adjustment component (5) comprises two sliders (51), and the sliders (51) are slidably mounted inside the slide grooves (4).

6. The biaxial stretching device for preparing a composite film according to claim 5, characterized in that: A lead screw (52) is threadedly connected at the center of the slider (51), one end of the lead screw (52) is rotatably mounted inside the slide groove (4), a driver (6) is fixedly connected to the side wall of the stretching table (1), and a driving end of the driver (6) is fixedly connected to the other end of the lead screw (52).

7. The biaxial stretching device for preparing a composite film according to claim 5, characterized in that: The adjustment assembly (5) further comprises a rotating column 1 (53) and a rotating column 2 (54), wherein the rotating column 1 (53) and the rotating column 2 (54) are respectively fixedly mounted on two sliders (51), and the top end of the rotating column 1 (53) is rotatably connected to the conveying device (2).

8. The biaxial stretching device for preparing a composite film according to claim 7, characterized in that: The top of the second rotating column (54) is rotatably connected to a sliding seat (55), and the sliding seat (55) is slidably mounted on the bottom of the conveying device (2).

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