CN210103060U

CN210103060U - PTFE material flat-width type blank film linear operation device

Info

Publication number: CN210103060U
Application number: CN201920355737.3U
Authority: CN
Inventors: 李敖琪; 成卓宇
Original assignee: Ningbo Changqi Fluorine Plastic Products Co ltd
Current assignee: Ningbo Changqi Fluorine Plastic Products Co ltd
Priority date: 2019-03-20
Filing date: 2019-03-20
Publication date: 2020-02-21
Anticipated expiration: 2029-03-20

Abstract

The utility model provides a PTFE material flat width type base membrane straight line running device, the base membrane is extruded the base membrane by the extruder and is passed through draw gear and pull the entrance that reachs the calender, draw gear include two carry over pinch rolls, the base membrane passes through between two carry over pinch rolls, utilizes two carry over pinch roll surface friction to pull, draw gear include the device frame, the carry over pinch roll setting on the device frame, the below of device frame be provided with the gyro wheel, draw gear and calender between still set up the photoelectric sensor who is used for reading base membrane edge linearity, photoelectric sensor pass through the motion of program module control gyro wheel, draw gear and extruder between still set up transmission. The utility model discloses following beneficial effect has: the linearity in the blank film transportation process can be automatically corrected, and good linearity is kept, so that a calender can extrude qualified products.

Description

PTFE material flat-width type blank film linear operation device

Technical Field

The utility model belongs to calendering membrane base mould transmission device field, concretely relates to flat wide type base membrane straight line operation device of PTFE material.

Background

In products such as sealing materials, filter materials, composite materials and the like mainly composed of a rolled film of a PTFE material, the die for extruding the raw film is mainly composed of two types, namely a round die and a flat die. The advantages of the flat die are obvious compared with the round die.

The rolled film obtained after rolling the blank film extruded by the flat die has the following advantages: 1) the width of the rolled film is wider, and the uniformity of the width is better; 2) the precision of the thickness of the rolled film can be obviously improved; 3) the strength uniformity in the longitudinal direction and the transverse direction is obviously improved, but the adopted process technology has high requirements, and if no corresponding process, technology and equipment exists, a blank film extruded by a flat die cannot be rolled into an ideal rolled film.

Because of this, in the PTFE sealing material industry in China at present, hundreds of processing enterprises adopt the rod-shaped blank extruded by the round-mouth die to manufacture the rolled film, and because of this, the PTFE sealing material (commonly called raw material tape) manufactured by these enterprises mostly stays at the middle and low grade level of the market, and even the raw material tape cannot enter high grade fields such as the insulation field of semiconductor, military electricity, and electric appliance cable wrapping.

As can be seen in fig. 1, the blanks entering the extruder are not continuous and are manufactured individually, comprising a blank 11, a barrel 12, a blank press 13, the blank press 13 pressing the blank 11 downwards in the barrel 12, each blank weighing 0.5-20 kg.

In order to ensure the quality of the rolled film, the corresponding process technology is adopted to control the extruded blank film. The following points are needed before the extruded film enters the calender:

(1) the length of the transition section extrusion die is 2-40M, preferably 15-20M, which is required by uniform-speed continuous production of a calender;

(2) the temperature of the extruded film in the transition stage needs to be kept in the range of 15-80 ℃;

(3) the volatilization of the lubricant of the extruded film in the transition stage is reduced as much as possible, and the volatilization amount is controlled to be less than 2 percent;

(4) the blank film insulated in the transition stage can not generate transverse wrinkle and can not deform due to stacking and extrusion. And ensure that the extruded film is at a middle fixed position in each transition roller and cannot shift left and right in the process of moving from the extrusion to the middle of the calender.

But now the following problems exist with the blank film before entering the calender: the temperature state of the blank film during extrusion can not be maintained, the blank film is easy to cool, the lubricant volatilizes quickly, the biggest problem is that the blank film has transverse wrinkles, the blank film deviates left and right relative to the central position of a calender and can not enter a calendering roller in a linear running mode, the blank film is blocked in the calendering process during calendering, the blank film is crushed, the error of the width of a finished belt after calendering is increased, the thickness is uneven, the fiber of the calendered film is crushed, the rejection rate of the belt is high, and the like.

Disclosure of Invention

Not enough to prior art, the utility model provides a PTFE material flat width type base membrane straight line operation device and method of rectifying thereof solves current base membrane operation in-process, and the temperature that appears can't keep the unanimous state, and emollient volatilizees soon, and horizontal wrinkle flexure appears, and skew about the central point of calender puts, the unable straight line problem that gets into the calender roll.

The utility model discloses a following technical scheme realizes.

The utility model provides a PTFE material flat width type base membrane straight line running device, the base membrane is extruded by the extruder, the base membrane passes through draw gear and pulls the entrance that reachs the calender, draw gear include two carry over pinch rolls, the base membrane passes through between two carry over pinch rolls, utilizes two carry over pinch roll surface friction to pull, draw gear include the device frame, the carry over pinch roll setting on the device frame, the below of device frame be provided with the gyro wheel, draw gear and calender between still set up the photoelectric sensor who is used for tracking base membrane edge linearity, photoelectric sensor pass through program module control draw gear and do lateral shifting, draw gear and extruder between still be provided with transmission. There are several ways to track the skew correction: the number of the deviation rectifying method is determined according to the state that whether the edge of the blank film which runs forward under the traction of the calender is in a relatively fixed position or not during calendering.

Preferably, the front end or the rear end of the device frame is also provided with a deviation-rectifying guide roller, a bearing is arranged in the deviation-rectifying guide roller, a fixed shaft is arranged in the bearing, two ends of the fixed shaft are connected with nuts, and the nuts are matched with the ball screw. The deviation can also be corrected by the upward moving positions of the left end and the right end of the deviation correcting guide roller.

Preferably, the transmission device comprises an insulation box, water is filled in the insulation box, a frame is arranged in the insulation box, a plurality of guide rails are arranged on the frame, floating rollers which can move up and down and rotate are arranged on the guide rails, a fixing roller is further arranged on the uppermost portion of the frame, the fixing roller and the floating rollers are arranged at intervals, and blank films sequentially pass through the space between the fixing roller and the floating rollers. The transmission device can automatically adjust the tension of the blank film according to the traction speed.

Preferably, the rack is further provided with a first guide roller, and two ends of the first guide roller are controlled by a lifting device. The lifting device is similar to a lifting mechanism on a deviation-correcting guide wheel, and a nut and a ball screw are matched, so that any end of the first guide roller can move up and down, and the horizontal direction is adjusted.

Preferably, the two ends of the floating roller are provided with installation sliding blocks, linear guide rails are arranged in the guide rails, grooves are arranged in the installation sliding blocks, and the grooves are matched with the linear guide rails.

Preferably, the two ends of the floating roller are provided with installation sliding blocks, the installation sliding blocks are internally provided with two guide bearings, linear steps are arranged in the guide rails, and the two guide bearings are perpendicular to each other and are matched with the linear steps arranged in the guide rails. The two guide bearings in this embodiment have minimal friction and are easy to slide up and down.

Preferably, the two ends of the floating roller are provided with installation sliding blocks, the installation sliding blocks are in a concave shape, a pulley installation seat is arranged in the guide rail, two sides of the pulley installation seat are provided with two pulleys, and the pulleys slide in the installation sliding blocks.

Compared with the prior art: the linearity in the blank film conveying process can be automatically corrected, and good linearity is kept, so that a calender can calender a good calendered film.

Drawings

Fig. 1 is a schematic structural diagram of the blank forming machine of the present invention.

Fig. 2 is a schematic structural diagram of the transmission device according to the present invention.

Fig. 3 is a second schematic structural diagram of the transmission device of the present invention.

Fig. 4 is a schematic structural view of floating rollers according to three embodiments of the present invention.

Fig. 5 is a schematic structural diagram (including primary and secondary) of the traction device of the present invention.

Fig. 6 is a top view of the traction device and calender positions of the present invention.

Fig. 7 is a side view of the deviation rectifying guide roller of the present invention.

Fig. 8 is a cross-sectional view of the deviation rectifying guide roller of the present invention.

Detailed Description

A PTFE material flat wide type blank film linear operation device, wherein a blank film is extruded by an extruder, the blank film is drawn to an inlet of a calender 94 by a drawing device, the drawing device comprises two drawing rollers 8, the blank film passes between the two drawing rollers 8 and is drawn by using the surface friction force of the two drawing rollers 8, the drawing device comprises a device frame 9, the drawing rollers 8 are arranged on the device frame 9, a roller 91 is arranged below the device frame 9, a photoelectric sensor 93 for reading the edge linearity of the blank film is also arranged between the drawing device and the calender 94, the photoelectric sensor 93 controls the movement of the roller 91 through a program module, a transmission device is also arranged between the drawing device and the extruder, a deviation-correcting guide roller 92 is also arranged at the front end or the rear end of the device frame 9, and a bearing 922 is arranged in the deviation-correcting guide roller 92, bearing 922 in set up fixed axle 923, the both ends coupling nut of fixed axle 923, nut and ball 921 join in marriage, transmission include insulation can 1, insulation can 1 in the jar income water, insulation can 1 in set up shelf 5, shelf 5 on be provided with many guided ways 6, guided way 6 on be provided with portable and rotatable floating roll 3 from top to bottom, the top of shelf still set up fixed roll 2, fixed roll 2 and floating roll 3 interval set up, the blank membrane passes through between fixed roll 2 and the floating roll 3 in proper order, shelf 5 on still set up first guide roll 7, the both ends of first guide roll 7 pass through elevating gear control, the both ends of floating roll 3 be provided with the installation slider, guided way 6 in set up sharp arch 31, the installation slider in set up the recess, the groove is matched with the linear protrusion, two ends of the floating roller 3 are provided with installation sliding blocks, two guide bearings 32 are arranged in the installation sliding blocks, the linear protrusion is arranged in the guide rail 6, the two guide bearings 32 are perpendicular to each other and are matched with the linear protrusion arranged in the guide rail 6, the two ends of the floating roller 3 are provided with installation sliding blocks, the installation sliding blocks are in a concave shape, a pulley installation seat 33 is arranged in the guide rail 6, two sides of the pulley installation seat 33 are provided with two pulleys, the pulleys slide in the installation sliding blocks, a standard linear value is set by taking a certain single side edge of a blank film as a reference, the measured linear value is compared with the standard linear value through induction of a photoelectric sensor 93 to obtain a comparison value, the deviation correction is carried out through the left-right movement of a roller 91 below the device frame 9, and the deviation correction times are determined according to the size of the comparison value, the error of the comparison value is within +/-1 mm, and the blank film can be directly fed into a calender for calendering without deviation rectification; the error of the comparison value is larger than 1.5mm, and the correction can be carried out at one time; if the error is larger than 3mm, after once deviation correction, the blank film can not be made to reach within +/-1.5 mm before entering a calender, more than 1 deviation correction is needed, the blank film is ensured to be within +/-1.5 mm of the edge linearity error before entering the calendering process, a standard straight line value is set by taking one single side edge of the blank film as a reference, the measured straight line value is compared with the standard straight line value through induction of a photoelectric sensor 93 to obtain a comparison value, the deviation correction is carried out through a deviation correction guide roller 92, a nut is driven to move up and down through rotation of a ball screw 921, the nut and a fixed shaft 923 move up and down together, one end of the deviation correction guide roller 92 inclines, the deviation correction function is achieved after the inclination, the inclination of one end of the deviation correction guide roller 92 is determined by the size of the comparison value, and when the deviation correction error of the comparison value is within +/-1 mm, the inclination of the deviation correction; the error of the comparison value is larger than 1.5mm, and the inclination of one end of the deviation rectifying guide roller 92 is 20-30 degrees; if the error is larger than 3mm, the inclination of one end of the deviation-rectifying guide roller 92 is 30-50 degrees, and the linearity error of the edge of the blank film before the pressure rolling process is ensured to be within +/-1.5 mm.

In the use process, continuous production cannot be realized due to the process limitation in the extrusion process of the flat die, because the PTFE blank film is placed in the extruder in the extrusion process, and the blank film is formed by extrusion from the flat die by high pressure, and the blank is not continuous and is manufactured individually, as shown in figure 1.

The extruded blank film is drawn by a drawing device, and passes through a transmission device as shown in fig. 3, the drawing device comprises a primary drawing device and a secondary drawing device, the primary drawing device is arranged between an extruder and a water tank, the secondary drawing device is arranged between the water tank and a calender, the two drawing rollers 8 and two second drawing rollers 8 ' jointly play a drawing role, the blank film is clamped and drawn by two

drawing rollers

8, 8 and 8 ' can be made of metal materials or non-metal materials, the surface of the drawing roller 8 and the second drawing roller 8 ' has certain roughness and higher precision no matter what materials are used, the drawing roller 8 and the second drawing roller 8 ' are drawn by surface friction force, the diameter of the drawing roller 8 and the diameter of the second drawing roller 8 ' are determined by the surface friction coefficient of the materials used by the drawing roller, and the second drawing roller 8 ' is arranged on a second device frame 9 '.

The tension of the blank film is ensured, the blank film is ensured to move between the fixed roller 2 and the floating roller, the blank film cannot frequently shift left and right, the blank film can shift and generate wrinkles if the tension is insufficient, the blank film has certain tension through the transmission device, the blank film is placed in the heat insulation box 1, the heat insulation box 1 is filled with water, the blank film is soaked in the water, the blank film sequentially passes through the space between the fixed roller 2 and the floating roller 3, due to the change of the traction force of the traction device, the guide rail 6 is provided with the floating roller 3 which can move up and down and rotate, and the floating roller 3 can move upwards along with the increase of the traction force.

The traditional heat preservation mode usually adopts 3 kinds of water heat preservation, hot air heat preservation and illumination heat preservation, and the water heat preservation is the best, and it can not only achieve good uniformity of temperature, but also utilize the water immersion method, prevent and reduce the volatilization of the lubricant in the extrusion film, and obtain two at a time.

The following three up-and-down moving modes of the floating roller 3 exist, i) mounting sliding blocks are arranged at two ends of the floating roller 3, linear protrusions 31 are arranged in the guide rails 6, grooves are arranged in the mounting sliding blocks, and the grooves slide in the linear protrusions; two ends of the floating roller 3 are provided with installation sliding blocks, two guide bearings 32 are arranged in the installation sliding blocks, linear protrusions are arranged in the guide rails 6, and the two guide bearings 32 are perpendicular to each other and are matched with the linear protrusions arranged in the guide rails 6; third) mounting sliding blocks are arranged at two ends of the floating roller 3, the mounting sliding blocks are in a concave shape, a pulley mounting seat 33 is arranged in the guide rail 6, two pulleys are arranged at two sides of the pulley mounting seat 33, and the pulleys slide in the concave shape of the mounting sliding blocks; the connection precision of the guide rail 6 and the shaft sleeve 4 on the end face of the floating roller in the three modes is good, when the floating roller 3 ascends and descends, the consistency of the force and the weight of the left end and the right end is good, the parallelism is good, and otherwise, the belt conveyed cannot be ensured to be shifted left and right and move forwards stably.

The blank film passing through the transmission device has tension, but needs to be corrected, at the moment, the blank film reaches the position of the traction device, two correction modes are provided, the edge tracking correction method is used for ensuring the linearity of the edge of the blank film, in order to enable the extruded blank film to smoothly enter a calender, one edge of the extruded blank film before entering the calender needs to be provided with good linearity, and the deviation needs to be controlled within +/-3 mm, and optimally +/-0.5 mm.

Firstly, a standard straight line value is set by taking a certain single side edge of a blank film as a reference, a measured straight line value is compared with the standard straight line value through the induction of a photoelectric sensor 93 to obtain a comparison value, the deviation is corrected by moving a roller 91 below a device frame 9' leftwards and rightwards, when the comparison value is positive, the roller moves leftwards and when the comparison value is negative, the roller moves rightwards, the deviation correction times are determined according to the size of the comparison value, the error of the comparison value is within +/-1 mm, and the blank film without the deviation correction can be directly fed into a calender for calendering; the error of the comparison value is larger than 1.5mm, and the correction can be carried out at one time; if the error is more than 3mm, after one-time deviation correction, the blank film can not reach +/-1.5 mm before entering the calender, and the deviation correction needs to be carried out for more than 1 time, so that the straightness error of the edge of the blank film before the entering and calendering process is guaranteed to be +/-1.5 mm.

Secondly, a standard straight line value is set by taking a certain single side edge of the blank film as a reference, the measured straight line value is compared with the standard straight line value through the induction of a photoelectric sensor 93 to obtain a comparison value, the deviation is corrected through a deviation correcting guide roller 92, the nut is driven to move up and down through the rotation of a ball screw 921 and moves up and down together with a fixed shaft 923, so that one end of the deviation correcting guide roller 92 is inclined, the deviation correcting function is realized after the inclination is realized, the inclination of one end of the deviation correcting guide roller 92 is determined by the size of the comparison value, and when the error of the comparison value is within +/-1 mm, the deviation correcting guide roller 92 does not need to be inclined; the error of the comparison value is larger than 1.5mm, and the inclination of one end of the deviation rectifying guide roller 92 is 20-30 degrees; if the error is larger than 3mm, the inclination of one end of the deviation-correcting guide roller 92 is 30-50 degrees, the edge linearity error of the blank film before the pressure-rolling process is ensured to be within +/-1.5 mm, the comparison value is positive, the left end of the fixed shaft 923 rises, the comparison value is negative, and the right end of the fixed shaft 923 rises.

The utility model discloses technical protection contains the same principle and extrudes the base membrane to PTFE, extrudes to advance the technological design of rectifying and ensuring straight line operation and all transmissions and the direction of calender in-process to the base membrane from flat mouthful of mould.

The protection scope of the present invention includes but is not limited to the above embodiments, the protection scope of the present invention is subject to the claims, and any replacement, deformation, and improvement that can be easily conceived by those skilled in the art made by the present technology all fall into the protection scope of the present invention.

Claims

1. A PTFE material flat-width blank film linear running device, a blank film is extruded by an extruder, it is characterized in that the blank film is drawn by a drawing device to the inlet of a calender (94), the traction device comprises two traction rollers (8), the blank film passes between the two traction rollers (8) and is drawn by the surface friction force of the two traction rollers (8), the traction device comprises a device frame (9), the traction roller (8) is arranged on the device frame (9), a roller (91) is arranged below the device frame (9), a photoelectric sensor (93) for reading the edge linearity of the blank film is also arranged between the traction device and the calender (94), the photoelectric sensor (93) controls the movement of the roller (91) through a program module, and a transmission device is also arranged between the traction device and the extruder.

2. The PTFE material flat blank film linear motion device according to claim 1, wherein the front end or the rear end of the device frame (9) is further provided with a deviation correction guide roller (92), the deviation correction guide roller (92) is internally provided with a bearing (922), the bearing (922) is internally provided with a fixed shaft (923), two ends of the fixed shaft (923) are connected with nuts, and the nuts are matched with the ball screw (921).

3. The PTFE material flat-width blank film linear operation device according to claim 2, wherein the transmission device comprises an insulation box (1), water is filled in the insulation box (1), a frame (5) is arranged in the insulation box (1), a plurality of guide rails (6) are arranged on the frame (5), a floating roller (3) which can move up and down and can rotate is arranged on each guide rail (6), a fixed roller (2) is further arranged at the uppermost part of the frame, the fixed roller (2) and the floating roller (3) are arranged at intervals, and blank films sequentially pass through the space between the fixed roller (2) and the floating roller (3).

4. The PTFE material flat-width type blank film linear motion device according to the claim 3, characterized in that the frame (5) is further provided with a first guide roller (7), and one end of the first guide roller (7) is controlled by a lifting device.

5. The PTFE material flat width type blank film linear motion device according to claim 3, characterized in that, the two ends of the floating roller (3) are provided with mounting sliding blocks, the guide rail (6) is provided with linear protrusions (31), the mounting sliding blocks are provided with grooves, and the grooves are matched with the linear protrusions.

6. The PTFE material flat-width type blank film linear operation device according to claim 3, characterized in that the two ends of the floating roller (3) are provided with installation sliding blocks, two guide bearings (32) are arranged in the installation sliding blocks, linear protrusions are arranged in the guide rails (6), and the two guide bearings (32) are perpendicular to each other and are matched with the linear protrusions arranged in the guide rails (6).

7. The PTFE material flat wide type blank film linear motion device according to claim 3, characterized in that, the two ends of the floating roller (3) are provided with mounting sliding blocks, the mounting sliding blocks are in a concave shape, the guide rail (6) is internally provided with a pulley mounting seat (33), two sides of the pulley mounting seat (33) are provided with two pulleys, and the pulleys slide in the mounting sliding blocks.