Tension and stress control device for PTFE (Polytetrafluoroethylene) film

Abstract

The utility model provides a PTFE (Polytetrafluoroethylene) film tension stress control device, which relates to the technical field of film processing, and comprises a bottom plate, a tension adjusting mechanism is arranged above the bottom plate, and the tension adjusting mechanism comprises a top plate, a servo electric cylinder, a pressure sensor, a connecting plate, a mounting cover and an adjusting roller, the tension during PTFE film conveying is automatically adjusted through the tension adjusting mechanism, the dust removal mechanism is arranged above the top plate, and the dust removal mechanism comprises an air guide pipe, a flow guide cover, a centrifugal fan, a filter frame, a flow dividing pipe, a corrugated telescopic pipe and a dust removal brush. Automatic tension adjustment of the conveyed PTFE film is achieved, the forming quality of the PTFE film is improved, dust adsorbed on the surface of the adjusting roller is swept off through the dust removal brush, then adsorption and dust removal are conducted through the dust suction holes, and therefore the surface of the adjusting roller is kept clean, the friction force between the PTFE film and the adjusting roller is stable, and the effect that the PTFE film can be stably conveyed is guaranteed.

Description

Technical Field

[0001] This utility model relates to the field of thin film processing technology, and in particular to a PTFE thin film tension stress control device. Background Technology

[0002] A film is a thin, soft, transparent sheet made of plastics, adhesives, rubber, or other materials. Scientifically, a film is a two-dimensional material formed by the deposition of atoms, molecules, or ions on the surface of a substrate. PTFE (polytetrafluoroethylene) films are widely used in light industry, military industry, aerospace, oil fields, and other fields because fillers such as pigments, glass fibers, carbon fibers, graphite, and bronze powder can be added to the raw materials and their properties can be improved after activation treatment. In the production process of PTFE films, such as extrusion and stretching, tension stress control devices are crucial. During the extrusion process, after the film is extruded from the extruder, it needs to be pulled and conveyed through a series of rollers. If the tension is not properly controlled, the film may have problems such as uneven thickness, overstretching, or understretching.

[0003] When existing tension regulating rollers control and transport film tension, dust easily adheres to the surface of the rollers due to static electricity. Dust adhering to the outside of the tension regulating rollers increases the surface roughness of the rollers. When the film is transported on the rollers, the dust causes uneven friction between the film and the rollers. This uneven friction may cause inconsistent film stretching, thus affecting the quality of the film. Furthermore, the dust adhering to the tension regulating rollers may transfer to the film surface, thereby reducing the production quality of PTFE films. Utility Model Content

[0004] The purpose of this invention is to address the shortcomings of existing technologies. Currently, the surface of tension adjusting rollers is prone to dust adhesion due to static electricity, which may cause inconsistent film stretching and thus affect film quality. Furthermore, dust may transfer to the film surface, reducing the production quality of PTFE films.

[0005] To achieve the above objectives, the present invention adopts the following technical solution:

[0006] A PTFE film tension stress control device includes a base plate, and a tension adjustment mechanism is arranged above the base plate. The tension adjustment mechanism includes a top plate, a servo electric cylinder, a pressure sensor, a connecting plate, a mounting cover, and an adjustment roller. The tension adjustment mechanism enables automatic adjustment of the tension of the PTFE film during conveying.

[0007] A dust removal mechanism is provided above the top plate, and the dust removal mechanism includes an air guide pipe, a flow guide hood, a centrifugal fan, a filter frame, a diversion pipe, a corrugated telescopic pipe, and a dust removal brush. The dust removal mechanism is used to sweep off and collect the dust adsorbed on the outside of the regulating roller.

[0008] Preferably, the lower end of the top plate is fixedly connected with a supporting plate, the lower end of the supporting plate is fixedly connected with the upper end of the bottom plate, the front surface of the supporting plate is provided with symmetrically distributed guide rollers through bearings, and the two servo electric cylinders are symmetrically fixedly installed on the lower end of the top plate.

[0009] Preferably, the two ends of the mounting cover are fixedly connected with the opposite ends of the two connecting plates respectively, the lower end of the pressure sensor is fixedly installed with the upper end of the connecting plate, the upper end of the pressure sensor is fixedly installed with one end of the piston rod of the servo electric cylinder, and the two ends of the adjusting roller are rotatably connected with the two side inner walls of the mounting cover through bearings.

[0010] Preferably, the lower end of the air guide pipe is fixedly connected with the upper end of the top plate, the outside of the centrifugal fan is fixedly installed with the inside of the air guide pipe, the outside of the filter frame is movably inserted with the upper end of the air guide pipe, and the lower end of the filter frame is in contact with the inner bottom wall of the air guide pipe.

[0011] Preferably, the inner wall of the filter frame is fixedly sleeved with a filter screen, the inner bottom wall of the filter frame is provided with a dust collecting groove, one end of the air guide pipe is fixedly communicated with a flow guide cover, and one end of the flow guide cover is fixedly communicated with a connecting pipe.

[0012] Preferably, one end of the connecting pipe penetrates and extends to the lower side of the top plate, one end of the connecting pipe is fixedly communicated with the outside of the shunt pipe, and the upper ends of the plurality of corrugated expansion pipes are linearly arrayed and fixedly communicated with the outside of the shunt pipe.

[0013] Preferably, the lower ends of the plurality of corrugated expansion pipes are fixedly communicated with the upper end of the mounting cover, the inner wall of the mounting cover is fixedly connected with the upper end of the dust removal brush, and the inner wall of the mounting cover is provided with linearly arrayed dust suction holes.

[0014] Compared with the prior art, the PTFE film tension stress control device has the advantages that:

[0015] In the utility model, through the cooperation of the tension adjusting mechanism and the dust removal mechanism, the automatic tension adjustment of the conveyed PTFE film is realized, the forming quality of the PTFE film is improved, the dust adsorbed on the surface of the adjusting roller is swept off by the dust removal brush, then the dust is adsorbed and removed through the dust suction holes, so that the surface of the adjusting roller is kept clean, the friction between the PTFE film and the adjusting roller is stable, and the effect that the PTFE film can be stably conveyed is guaranteed. BRIEF DESCRIPTION OF DRAWINGS

[0016] Figure 1 The utility model provides a kind of PTFE film tension stress control device's main body structure schematic diagram.

[0017] Figure 2 A split pipe structure perspective view of the PTFE film tension stress control device is provided in the utility model;

[0018] Figure 3 A mounting cover structure perspective view of the PTFE film tension stress control device is provided in the utility model;

[0019] Figure 4 A wind guide pipe structure perspective view of the PTFE film tension stress control device is provided in the utility model.

[0020] Legend: 1, bottom plate; 2, top plate; 21, servo electric cylinder; 22, pressure sensor; 23, connecting plate; 24, mounting cover; 25, adjusting roller; 26, support plate; 27, guide roller; 3, wind guide pipe; 31, flow guide cover; 32, centrifugal fan; 33, filter frame; 34, split pipe; 35, corrugated expansion pipe; 36, dust removal brush; 37, filter screen; 38, dust collection tank; 39, dust suction hole; 310, connecting pipe. DETAILED DESCRIPTION

[0021] The technical scheme in the embodiments of the utility model will be described clearly and completely below with reference to the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, rather than all the embodiments. Based on the embodiments of the utility model, all other embodiments obtained by those skilled in the art without creative labor fall within the scope of protection of the utility model.

[0022] In order to facilitate understanding of the utility model, the utility model will be described more fully below with reference to the related, a number of embodiments of the utility model are given, however, the utility model can be realized in many different forms, and is not limited to the embodiments described in the text, on the contrary, the purpose of providing these embodiments is to make the disclosure of the utility model more thorough and comprehensive.

[0023] It should be noted that when an element is referred to as being "fixed to" another element, it can be directly on the other element or there can be a middle element, and when an element is referred to as being "connected to" another element, it can be directly connected to the other element or there can be a middle element, the terms "vertical", "horizontal", "left", "right" and similar expressions used herein are for illustrative purposes only.

[0024] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this application belongs. The terminology used in the description herein is for describing particular embodiments only and is not intended to be limiting of the application. The use herein of the terms "and / or" includes a set of one or more associated listed items.

[0025] Embodiment

[0026] As Figures 1-4 shown, the utility model provides a technical scheme: a kind of PTFE film tension stress control device, including bottom plate 1, and the upper portion of bottom plate 1 is provided with tension adjusting mechanism, and tension adjusting mechanism includes top plate 2, servo electric cylinder 21, pressure sensor 22, connecting plate 23, mounting cover 24 and adjusting roller 25, realize the tension of PTFE film conveying by tension adjusting mechanism is automatically regulated;

[0027] The upper portion of top plate 2 is provided with dust removal mechanism, and dust removal mechanism includes air deflector 3, flow guide cover 31, centrifugal fan 32, filter frame 33, shunt pipe 34, corrugated expansion pipe 35 and dust removal brush 36, dust removal mechanism is swept off and adsorbed collection to realize the dust adsorbed outside adjusting roller 25.

[0028] By the automatic tension regulation of the PTFE film conveying, improve the forming quality of PTFE film, and the dust adsorbed on the surface of adjusting roller 25 is swept off by dust removal brush 36, then is adsorbed by negative pressure, so as to keep the surface of adjusting roller 25 clean, make the friction force between PTFE film and adjusting roller 25 stable, guarantee the effect that PTFE film can be stably conveyed.

[0029] The lower end of top plate 2 is fixedly connected with support plate 26, and support plate 26 plays a role in stably supporting top plate 2, and the lower end of support plate 26 is fixedly connected with the upper end of bottom plate 1.

[0030] The front of support plate 26 is provided with symmetrically distributed guide rollers 27 through bearings, the guide rollers 27 are usually made of high-strength metal materials, and the surfaces are specially treated to ensure that the film can slide smoothly during conveying, reduce friction and wear, and when passing through the guide rollers 27, attention should be paid to the edges of the film being neat to avoid wrinkles or skewing, and the two servo electric cylinders 21 are symmetrically distributed and fixedly installed at the lower end of the top plate 2.

[0031] Two ends of the mounting cover 24 are fixedly connected with one end of the two connecting plates 23 opposite to each other, the lower end of the pressure sensor 22 is fixedly installed with the upper end of the connecting plate 23, the upper end of the pressure sensor 22 is fixedly installed with one end of the piston rod of the servo electric cylinder 21, in the process of pressing, the pressure sensor 22 monitors the pressure applied by the adjusting roller to the film in real time, and displays the pressure value, the operator can adjust the extension length of the servo electric cylinder 21 according to the value of the pressure sensor 22, so as to control the tension of the PTFE film during conveying.

[0032] The two ends of the adjusting roller 25 are rotatably connected with the inner walls of the two sides of the mounting cover 24 through bearings, the adjusting roller 25 plays a key role in the whole system, its position and pressure can accurately control the tension of the PTFE film during conveying, and the adjusting roller generally adopts a material with wear resistance and moderate hardness to adapt to the working requirements under different tensions.

[0033] The lower end of the air guide pipe 3 is fixedly connected with the upper end of the top plate 2, the centrifugal fan 32 is fixedly installed outside the air guide pipe 3, the filter frame 33 is movably inserted with the upper end of the air guide pipe 3, and the lower end of the filter frame 33 is in contact with the inner bottom wall of the air guide pipe 3, the air guide pipe 3 generally adopts a circular or square pipe with smooth inner wall and small resistance, which can ensure that the dust will not be blocked during conveying.

[0034] The inner wall of the filter frame 33 is fixedly sleeved with a filter screen 37, the inner bottom wall of the filter frame 33 is provided with a dust collecting groove 38, one end of the air guide pipe 3 is fixedly communicated with a flow guide cover 31, one end of the flow guide cover 31 is fixedly communicated with a connecting pipe 310, the operator can regularly draw out the filter frame 33 to uniformly treat the dust in the filter screen 37 and the dust collecting groove 38, and the filter frame 33 is designed to be detachable and installable, so that the operator can conveniently clean and maintain.

[0035] One end of the connecting pipe 310 penetrates and extends below the top plate 2, one end of the connecting pipe 310 is fixedly communicated with the outside of the shunt pipe 34, the upper ends of the plurality of corrugated expansion pipes 35 are linearly arrayed and fixedly communicated with the outside of the shunt pipe 34, the corrugated expansion pipe 35 plays an important role, the corrugated expansion pipe 35 has good expansion characteristics, can freely expand and contract with the lifting of the mounting cover 24, and ensures that the space inside the mounting cover is sealed with the external environment.

[0036] The lower ends of the corrugated telescopic pipes 35 are fixedly communicated with the upper end of the mounting cover 24, the inner wall of the mounting cover 24 is fixedly connected with the upper end of the dust removal brush 36, the inner wall of the mounting cover 24 is provided with the dust suction holes 39 arranged in a linear array, the dust removal brush 36 is usually made of soft fiber material, such as nylon or wool, and can effectively brush off the dust on the surface of the adjusting roller 25 due to electrostatic adsorption, the electrostatic adsorption is a common phenomenon in the film production and conveying process, since the PTFE film has good insulation performance, static electricity is easily generated, thereby adsorbing the dust and impurities around, if the dust is not removed in time, the quality and performance of the film will be affected.

[0037] The utility model work flow is:

[0038] Step one, the stretched PTFE film is first threaded through the upper end of one of the guide rollers 27, then passes around the lower end of the adjusting roller 25 and is conveyed by passing around the upper end of the other guide roller 27, the piston rod of the servo electric cylinder 21 is extended to move, the adjusting roller 25 in the mounting cover 24 is driven by the connecting plate 23 to press the PTFE film, and the tension of the PTFE film during conveying is controlled by the value displayed by the pressure sensor 22, and the adjusting roller 25 is lifted and lowered by the mounting cover 24 through the telescopic property of the corrugated telescopic pipe 35;

[0039] Step two, the adjusting roller 25 rotates during the conveying of the PTFE film, and since the outer side is in contact with the upper end of the dust removal brush 36, the dust on the surface of the adjusting roller 25 due to electrostatic adsorption is brushed off by rotating and cooperating with the dust removal brush 36, at this time, the centrifugal fan 32 works, the dust suction holes 39 produce negative pressure, the brushed-off dust is sucked into the mounting cover 24 through the dust suction holes 39, then is conveyed to the connecting pipe 310 through the shunt pipe 34 and the corrugated telescopic pipe 35, then is conveyed to the air guide pipe 3 through the flow guide cover 31 and the dust is intercepted by the filter screen 37, so that the dust falls into the dust collecting groove 38, the operator can regularly draw out the filter frame 33, so that the dust in the filter screen 37 and the dust collecting groove 38 is uniformly treated.

[0040] Although the embodiments of the utility model have been shown and described, it can be understood by those skilled in the art that various changes, modifications, replacements and variations can be made to these embodiments without departing from the principles and spirits of the utility model, the scope of the utility model is defined by the appended claims and their equivalents.

Claims

1. A PTFE film tension stress control device comprising a base plate (1), characterized in that: The upper side of the bottom plate (1) is provided with a tension adjusting mechanism, and the tension adjusting mechanism comprises a top plate (2), a servo electric cylinder (21), a pressure sensor (22), a connecting plate (23), a mounting cover (24) and an adjusting roller (25), and the tension adjusting mechanism is used for automatically adjusting the tension of the PTFE film during conveying. The upper side of the top plate (2) is provided with a dust removal mechanism, and the dust removal mechanism comprises a wind guide pipe (3), a flow guide cover (31), a centrifugal fan (32), a filter frame (33), a shunt pipe (34), a corrugated expansion pipe (35) and a dust removal brush (36), and the dust removal mechanism is used for sweeping off and collecting the dust adsorbed on the outer side of the adjusting roller (25).

2. A PTFE film tension stress control device according to claim 1, characterized by: The lower end of the top plate (2) is fixedly connected with a supporting plate (26), the lower end of the supporting plate (26) is fixedly connected with the upper end of the bottom plate (1), and the front surface of the supporting plate (26) is rotatably connected with symmetrically distributed guide rollers (27) through bearings.

3. A PTFE film tension stress control device according to claim 1, characterized by: The two ends of the mounting cover (24) are fixedly connected with the opposite ends of the two connecting plates (23), the lower end of the pressure sensor (22) is fixedly installed with the upper end of the connecting plate (23), the upper end of the pressure sensor (22) is fixedly installed with one end of the piston rod of the servo electric cylinder (21), and the two ends of the adjusting roller (25) are rotatably connected with the inner walls of the two sides of the mounting cover (24) through bearings.

4. The PTFE film tension stress control apparatus of claim 1, wherein: The lower end of the wind guide pipe (3) is fixedly connected with the upper end of the top plate (2), the outer side of the centrifugal fan (32) is fixedly installed with the inner side of the wind guide pipe (3), and the outer side of the filter frame (33) is movably inserted with the upper end of the wind guide pipe (3), and the lower end of the filter frame (33) is in contact with the inner bottom wall of the wind guide pipe (3).

5. The PTFE film tension stress control apparatus of claim 1, wherein: The inner wall of the filter frame (33) is fixedly sleeved with a filter screen (37), the inner bottom wall of the filter frame (33) is provided with a dust collecting groove (38), one end of the wind guide pipe (3) is fixedly communicated with one end of the flow guide cover (31), and one end of the flow guide cover (31) is fixedly communicated with a connecting pipe (310).

6. A PTFE film tension stress control apparatus according to claim 5, wherein: One end of the connecting pipe (310) penetrates and extends below the top plate (2), one end of the connecting pipe (310) is fixedly communicated with the outer side of the shunt pipe (34), and the upper ends of the plurality of corrugated expansion pipes (35) are linearly arrayed and fixedly communicated with the outer side of the shunt pipe (34).

7. A PTFE film tension stress control apparatus according to claim 1, wherein: The lower ends of the plurality of corrugated expansion pipes (35) are fixedly communicated with the upper end of the mounting cover (24), the inner wall of the mounting cover (24) is fixedly connected with the upper end of the dust removal brush (36), and the inner wall of the mounting cover (24) is provided with linearly arrayed dust suction holes (39).

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