Bidirectional stretching device for polytetrafluoroethylene unsintered belt

Abstract

The utility model relates to the technical field of unsintered belt processing, and belongs to a two-way stretching device for a polytetrafluoroethylene unsintered belt. Comprising a base and a machine body, the machine body is arranged on the base, a stretching mechanism is arranged on the machine body and comprises a first stretching roller and an adjusting stretching roller, a buffering assembly is arranged between the first stretching roller and the adjusting stretching roller, and the adjusting stretching roller comprises a roller assembly and a radial adjusting assembly. According to the utility model, the unsintered belt breakage caused by sudden stop or sudden acceleration of the device in the stretching process can be effectively avoided, the safety performance of the device is improved, the belt breakage condition is reduced, the yield is improved, the adjustment of the diameter size of the stretching roller can be realized, and the production efficiency is improved. Therefore, the stretching differential speed between the first stretching roller and the second stretching roller can be adjusted, the device is suitable for stretching unsintered materials of more specifications, and the applicability of the device is improved.

Description

Technical Field

[0001] The utility model relates to the technical field of unsintered belt processing, and belongs to a bidirectional stretching device for an unsintered polytetrafluoroethylene belt. Background Art

[0002] Polytetrafluoroethylene unsintered tape, also commonly known as raw tape, is a material made of polytetrafluoroethylene (PTFE) resin, which has a series of excellent properties and application characteristics such as heat resistance, insulation performance, corrosion resistance and acid and alkali resistance.

[0003] After biaxial stretching, the performance of unsintered PTFE tape will be further improved to meet the needs of more specific fields. After biaxial stretching, the mechanical strength, dimensional stability and chemical corrosion resistance of unsintered PTFE tape can be improved.

[0004] During the stretching process, the stretching speed of the device may fluctuate suddenly, which will cause uneven tension in the local area of ​​the unsintered belt being processed, thereby increasing the possibility of breaking the unsintered belt, affecting the product yield and causing material waste. In addition, as the application fields of unsintered belts are increasing, the requirements for product specifications are more diversified. However, the current stretching device is inconvenient to adjust the stretching differential speed, and the applicability of the device is low. Utility Model Content

[0005] In view of the above technical problems, the utility model provides a biaxial stretching device for unsintered polytetrafluoroethylene tape.

[0006] In order to achieve the above purpose, the utility model provides the following technical solutions:

[0007] The present application provides a biaxial stretching device for polytetrafluoroethylene unsintered tape, comprising a base and a body, wherein the body is arranged on the base, and a stretching mechanism is provided on the body, wherein the stretching mechanism comprises a No. 1 stretching roller and an adjusting stretching roller, and a buffer assembly is provided between the No. 1 stretching roller and the adjusting stretching roller, and the adjusting stretching roller comprises a roller assembly and a radial adjustment assembly.

[0008] Preferably, the buffer assembly includes a buffer rod and a buffer spring, and connecting blocks are provided at both ends of the No. 1 stretching roller and the adjusting stretching roller, one end of the buffer rod is connected to the connecting block, and the connecting block is rotatably connected to the No. 1 stretching roller and the adjusting stretching roller, and the buffer spring is arranged on the buffer rod.

[0009] Preferably, the machine body is provided with an installation groove and a displacement groove, the connecting block is fixedly connected with a sliding block, the sliding block and the displacement groove are slidably connected, a punch rod sleeve is provided in the installation groove, the buffer rod is movably connected to the punch rod sleeve, a accommodating cavity and a buffer hole are provided in the punch rod sleeve, and the buffer spring is located in the accommodating cavity.

[0010] Preferably, the roller assembly includes multiple roller plates and a transmission shaft, the radial adjustment assembly includes a mounting block and a radial telescopic rod, the mounting block is connected to the transmission shaft through an axial hole, a plurality of radial telescopic rods are provided on the mounting block, the output end of the radial telescopic rod is connected to a connecting plate, and the connecting plate is connected to the roller plate.

[0011] Preferably, one end of the No. 1 stretching roller is connected to a No. 1 motor via a coupling.

[0012] Preferably, one end of the adjustable stretching roller is connected to a second motor via a coupling.

[0013] Compared with the prior art, the present invention provides a biaxial stretching device for unsintered polytetrafluoroethylene tape, which has the following beneficial effects:

[0014] 1. The utility model is provided with a buffer component between the No. 1 stretching roller and the adjusting stretching roller. The buffer component can play a buffering role on the No. 1 stretching roller and the adjusting stretching roller, which can effectively avoid the breakage of the unsintered belt caused by the sudden stop or sudden acceleration of the device during the stretching process, improve the safety performance of the device, reduce the breakage of the belt, and improve the yield rate.

[0015] 2. The radial adjustment component of the utility model can adjust the diameter size of the adjustable stretching roller, thereby adjusting the stretching differential between the No. 1 stretching roller and the adjustable stretching roller, which is suitable for stretching of more specifications of unsintered products and improves the applicability of the device.

[0016] The features and advantages of the present invention will be described in detail through embodiments in conjunction with the accompanying drawings. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] Figure 1 It is a schematic diagram of the overall structure of the utility model;

[0018] Figure 2 This is a schematic diagram of the structure of the buffer component of the utility model;

[0019] Figure 3 It is a cross-sectional view of the utility model;

[0020] Figure 4 for Figure 3 A partial enlarged view of the middle A;

[0021] In the figure: 1. base; 2. machine body; 3. stretching mechanism; 4. buffer assembly; 5. radial adjustment assembly; 31. stretching roller No. 1; 32. adjusting stretching roller; 33. roller assembly; 311. motor No. 1; 321. motor No. 2; 331. roller plate; 332. transmission shaft; 41. buffer rod; 42. connecting block; 43. buffer spring; 44. sliding block; 45. punch rod sleeve; 451. accommodating chamber; 452. buffer hole; 51. mounting block; 52. radial telescopic rod; 53. connecting plate. DETAILED DESCRIPTION

[0022] In order to make the purpose, technical scheme and advantages of the present invention more clear, the present invention is further described in detail below through the accompanying drawings and embodiments. However, it should be understood that the specific embodiments described herein are only used to explain the present invention and are not used to limit the scope of the present invention. In addition, in the following description, the description of the known structures and technologies is omitted to avoid unnecessary confusion of the concept of the present invention.

[0023] See also Figure 1 The present invention provides a biaxial stretching device for polytetrafluoroethylene unsintered belt, comprising a base 1 and a body 2, wherein the body 2 is arranged on the base 1, and a stretching mechanism 3 is provided on the body 2, wherein the stretching mechanism 3 comprises a No. 1 stretching roller 31 and an adjusting stretching roller 32, and a buffer component 4 is provided between the No. 1 stretching roller 31 and the adjusting stretching roller 32, and the adjusting stretching roller 32 comprises a roller component 33 and a radial adjustment component 5, and the radial adjustment component 5 is used to adjust the diameter size of the adjusting stretching roller 32, and different diameters can produce different stretching differentials.

[0024] See also Figure 2 Specifically, the buffer assembly 4 includes a buffer rod 41 and a buffer spring 43. Both ends of the No. 1 stretching roller 31 and the adjusting stretching roller 32 are provided with connecting blocks 42. One end of the buffer rod 41 is connected to the connecting block 42. The connecting block 42 is rotatably connected to the No. 1 stretching roller 31 and the adjusting stretching roller 32. The buffer spring 43 is arranged on the buffer rod 41, and the buffer spring 43 is used to buffer the impact caused by the instantaneous speed difference.

[0025] See also Figure 2 Specifically, the body 2 is provided with an installation groove 21 and a displacement groove 22, the connecting block 42 is fixedly connected with a sliding block 44, the sliding block 44 and the displacement groove 22 are slidably connected, a punch rod sleeve 45 is provided in the installation groove 21, the buffer rod 41 is movably connected with the punch rod sleeve 45, the buffer rod 41 and the punch rod sleeve 45 cooperate to form a buffer stroke, the punch rod sleeve 45 is provided with an accommodating cavity 451 and a buffer hole 452, and the buffer spring 43 is located in the accommodating cavity 451.

[0026] See also Figure 3-4Specifically, the roller assembly 33 includes multiple roller plates 331 and a transmission shaft 332, and the radial adjustment assembly 5 includes a mounting block 51 and a radial telescopic rod 52. The mounting block 51 is connected to the transmission shaft 332 through an axial hole. A plurality of radial telescopic rods 52 are provided on the mounting block 51. The output end of the radial telescopic rod 52 is connected to a connecting plate 53, and the connecting plate 53 is connected to the roller plate 331.

[0027] See also Figure 1 Specifically, one end of the No. 1 stretching roller 31 is connected to the No. 1 motor 311 through a coupling, and the No. 1 motor 311 is used to provide power to the No. 1 stretching roller 31 .

[0028] See also Figure 1 Specifically, one end of the adjustable stretching roller 32 is connected to a second motor 321 through a coupling, and the second motor 321 is used to provide power to the adjustable stretching roller 32 .

[0029] The working principle of the utility model is as follows: during the stretching process of the polytetrafluoroethylene unsintered belt, the No. 1 motor 311 is used to provide power to the No. 1 stretching roller 31, and the No. 2 motor 321 is used to provide power to the adjustable stretching roller 32. The unsintered belt is stretched by the stretching differential between the No. 1 stretching roller 31 and the adjustable stretching roller 32. When the differential fluctuation occurs, the No. 1 stretching roller 31 and the adjustable stretching roller 32 vibrate, the sliding block 44 moves along the displacement groove 22, the buffer rod 41 withstands the impact, and transmits the impact force to the buffer spring 43. The buffer spring 43 absorbs the impact energy to form a buffer. During this process, the buffer rod 41 moves in the punch sleeve 45, and the punch sleeve 45 forms a travel limit to ensure the stability of the device. When it is necessary to change the speed difference to stretch different polytetrafluoroethylene unsintered tapes, start the radial telescopic rod 52 to push or pull back the roller plate 331 to move radially along the adjustable stretching roller 32, so as to change the diameter of the adjustable stretching roller 32, thereby changing the stretching stroke, changing the stretching speed of the adjustable stretching roller 32, and further changing the stretching differential between the No. 1 stretching roller 31 and the adjustable stretching roller 32.

[0030] The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. Any modification, equivalent substitution or improvement made within the spirit and principle of the present invention shall be included in the protection scope of the present invention.

Claims

1. A biaxial stretching device for polytetrafluoroethylene unsintered tape, characterized in that: The invention comprises a base (1) and a machine body (2), wherein the machine body (2) is arranged on the base (1), and a stretching mechanism (3) is provided on the machine body (2), wherein the stretching mechanism (3) comprises a first stretching roller (31) and an adjusting stretching roller (32), a buffer component (4) is provided between the first stretching roller (31) and the adjusting stretching roller (32), and the adjusting stretching roller (32) comprises a roller component (33) and a radial adjustment component (5).

2. The biaxial stretching device for polytetrafluoroethylene unsintered tape according to claim 1, characterized in that: The buffer assembly (4) comprises a buffer rod (41) and a buffer spring (43); both ends of the first stretching roller (31) and the adjusting stretching roller (32) are provided with connecting blocks (42); one end of the buffer rod (41) is connected to the connecting block (42); the connecting block (42) is rotatably connected to the first stretching roller (31) and the adjusting stretching roller (32); and the buffer spring (43) is arranged on the buffer rod (41).

3. The biaxial stretching device for polytetrafluoroethylene unsintered tape according to claim 2, characterized in that: The body (2) is provided with a mounting groove (21) and a displacement groove (22); a sliding block (44) is fixedly connected to the connecting block (42); the sliding block (44) and the displacement groove (22) are slidably connected; a plunger sleeve (45) is provided in the mounting groove (21); the buffer rod (41) and the plunger sleeve (45) are movably connected; a receiving cavity (451) and a buffer hole (452) are provided in the plunger sleeve (45); and the buffer spring (43) is located in the receiving cavity (451).

4. The biaxial stretching device for polytetrafluoroethylene unsintered tape according to claim 1, characterized in that: The roller assembly (33) comprises a plurality of roller plates (331) and a transmission shaft (332); the radial adjustment assembly (5) comprises a mounting block (51) and a radial telescopic rod (52); the mounting block (51) is connected to the transmission shaft (332) via a shaft hole; a plurality of radial telescopic rods (52) are provided on the mounting block (51); the output ends of the radial telescopic rods (52) are connected to a connecting plate (53); and the connecting plate (53) is connected to the roller plate (331).

5. The biaxial stretching device for polytetrafluoroethylene unsintered tape according to claim 1, characterized in that: One end of the No. 1 stretching roller (31) is connected to a No. 1 motor (311) via a coupling.

6. The biaxial stretching device for polytetrafluoroethylene unsintered tape according to claim 1, characterized in that: One end of the adjustable stretching roller (32) is connected to a second motor (321) via a coupling.

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