CN117697872A - PTFE special-shaped cable film processing method and PTFE special-shaped cable film processing equipment - Google Patents

Abstract

The application relates to the field of cutting equipment, and specifically discloses a PTFE special-shaped cable film processing method and PTFE special-shaped cable film processing equipment, which comprises the following steps: s1, unreeling, namely unreeling the film coil stock through unreeling equipment; s2, traction is carried out, the film after unreeling is tensioned, and the film is straightened; s3, shaping, wherein the cross-section outline of the PTFE special-shaped cable film is set to be an isosceles trapezoid film belt structure, symmetrical cutting faces are formed on two sides of the PTFE special-shaped cable film, a plurality of shaping cutters are used for pressing out parting grooves on the straightened film, blanks of the PTFE special-shaped cable film are formed between every two adjacent parting grooves, and the groove walls on two sides of each parting groove are consistent with each parting face; s4, cutting, namely cutting the PTFE special-shaped cable film into a shape by a plurality of cutting tools along the length direction of the cutting grooves; s5, winding, namely winding the cut PTFE special-shaped cable film through a winding roller. The film strip processed by the method can effectively improve the consistency and comprehensive performance of the cable diameter.

Description

PTFE special-shaped cable film processing method and PTFE special-shaped cable film processing equipment

Technical Field

The application relates to the field of cutting equipment, in particular to a PTFE special-shaped cable film processing method and PTFE special-shaped cable film processing equipment.

Background

The PTFE cable film has the characteristics of low dielectric constant, low dielectric loss, chemical corrosion resistance, high temperature resistance, high electric breakdown strength, high tensile strength, high elongation at break and the like, is suitable for various cables such as coaxial cable insulation, power cable insulation, thermocouple wire insulation and the like, is widely applied to the fields such as telecommunication, test measurement, national defense, aerospace and the like, and becomes an indispensable important insulating medium in the modern industry.

In the development process of the manufacturing technology of the fluoroplastic cable film, the PTFE is named as polytetrafluoroethylene, and because the polytetrafluoroethylene is a thermoplastic material, the melting point of the polytetrafluoroethylene is near 327 ℃, and meanwhile, the melt viscosity of the polytetrafluoroethylene is extremely high, even if the polytetrafluoroethylene is heated to above the melting point, the polytetrafluoroethylene still only takes a gel state and does not take a molten state. Even when the processing temperature reaches the decomposition temperature and decomposition occurs, polytetrafluoroethylene cannot flow and cannot be injected or extruded, and polytetrafluoroethylene powder is easy to form fiber under the action of shearing force, so that polytetrafluoroethylene cannot be processed by adopting the traditional melt processing method of thermoplastic plastics. The wire and cable must be produced by film tape wrapping or paste extrusion, wherein the wrapping process is to wrap a polytetrafluoroethylene film tape cut into a certain width onto the wire core, and then sinter-molding. During the wrapping process, the difference of the thickness of the film strip and the width of the overlapped edge can influence the number of the wrapping layers of the medium, thereby influencing the diameter of the cable.

In order to ensure comprehensive performances such as cable diameter and bending capacity, the application provides a PTFE special-shaped cable film processing method and PTFE special-shaped cable film processing equipment.

Disclosure of Invention

In a first aspect, the present application provides a method for processing a PTFE special-shaped cable film, including the steps of:

s1, unreeling, namely unreeling the film coil stock through unreeling equipment;

s2, traction is carried out, the film after unreeling is tensioned, and the film is straightened;

s3, shaping, namely setting the PTFE special-shaped cable film into a strip-shaped structure with isosceles trapezoid cross section profile, forming symmetrical cutting surfaces on two sides of the PTFE special-shaped cable film, and pressing out parting grooves on the straightened film through a plurality of shaping cutters, wherein blanks of the PTFE special-shaped cable film are formed between adjacent parting grooves, and the groove walls on two sides of the parting grooves are consistent with the cutting surfaces;

s4, cutting, namely cutting the PTFE special-shaped cable film into a shape by a plurality of cutting tools along the length direction of the cutting grooves;

s5, winding, namely winding the cut PTFE special-shaped cable film through a winding roller.

By adopting the technical scheme, the stretched film is pulled and straightened, and then the straightened film is shaped and cut, so that the error generated by elastic bisection and cutting of the film can be effectively reduced, and the processing precision of the PTFE special-shaped cable film is improved; through pressing the grooving to the film, can be to the preliminary blank shape design of film, then cut it again, can further improve the machining precision to PTFE dysmorphism cable membrane, and then can effectively improve the precision and the holistic comprehensive properties of cable diameter that adopts PTFE dysmorphism cable membrane to produce.

Optionally, in step S2, when the film is pulled, the elastic force of the film is required to be overcome, so that the tension of the film approaches zero, and uneven slitting caused by film shaking or stretching in the shaping and slitting process is reduced.

In a second aspect, the application provides a PTFE special-shaped cable membrane processing device, which comprises a machine body, be provided with on the organism be used for unreeling the film the subassembly of unreeling, to unreeling back film traction and carry tensioning assembly and be used for rolling PTFE special-shaped cable membrane the subassembly of shaping that is used for pressing out the grooving on the film and is used for cutting the slitting subassembly of film still be provided with on the organism.

Through adopting above-mentioned technical scheme, utilize tensioning assembly to pull the film and straighten, extend the film, reduce the elasticity of film and to the influence of cutting, then design film width through design subassembly, then cut the film that the design is good by cutting the subassembly again, cut the film into the film area of the same width, can effectively improve the machining precision in film area, and then improve the overall quality of cable.

Optionally, the shaping subassembly includes shaping cutter roll, shaping roller and coaxial fixing shaping cutter on the shaping cutter roll, shaping cutter is followed the length direction evenly distributed of shaping cutter roll has a plurality ofly, shaping cutter roll with shaping roller mutually parallel rotation install in on the organism, the film passes shaping cutter roll with shaping roller, shaping cutter crimping is on the film.

Through adopting above-mentioned technical scheme, install a plurality of sizing knives on the sizing knife roller, when processing, the film passes between sizing knife roller and the sizing roller, and the sizing knife can extrude on the film of extension and divide the grooving, makes the film form preliminary film strip blank.

Optionally, the slitting assembly includes the slitting knife roller, cuts the roller and coaxially fixes divide the slitting knife on the slitting knife roller, the slitting knife is followed the length direction evenly distributed who cuts the knife roller has a plurality ofly, the slitting knife roller with the slitting roller mutually parallel rotation install in on the organism, the slitting knife roller with the slitting roller is located the shaping subassembly is close to one side of rolling assembly, the slitting knife with shaping knife one-to-one, the film passes the slitting knife roller with the slitting roller, the slitting knife inserts and locates cut inslot and cut the film.

Through adopting above-mentioned technical scheme, install a plurality of branch cutters in the position that corresponds the sizing knife on cutting the knife roller, when processing, the film of extrusion branch cutting groove passes from cutting knife roller and cutting between the roller, cuts the knife and inserts and establish in the branch cutting groove of film and cut the film, cuts out the film strip of final edition, can improve the machining precision of film strip.

Optionally, the tensioning component comprises a tensioning component and a traction component, the tensioning component is located on one side of the shaping component, which is close to the unreeling component, and the traction component is located on one side of the slitting component, which is close to the reeling component; the tensioning component comprises a tensioning roller and a first compression roller pressed on the tensioning roller, and a film passes through the space between the tensioning roller and the first compression roller; the traction component comprises a traction roller, a second compression roller pressed on the traction roller and a driving piece for driving the traction roller to rotate, and the tensioning roller and the traction roller synchronously rotate

Through adopting above-mentioned technical scheme, set up tensioning part and traction element, press from both sides tight film of tensioning part and cut tension, the driving piece drive traction roller carries out the tractive to the film and carries, can prolong the expansion with the film, overcomes the elastic force of film, conveniently finalizes the design of film and cut.

Optionally, the tensioning assembly further comprises an adjusting roller, wherein the adjusting roller is slidably arranged on the machine body between the shaping assembly and the slitting assembly and used for adjusting the tightness of the film.

Through adopting above-mentioned technical scheme, set up the dancer roll, when processing, can adjust the position of dancer roll according to the tensioning condition of film to the elasticity that the adjustment film stretched.

Optionally, a guide roller for guiding the film is further installed on the machine body, and the guide roller is located between the unreeling component and the tensioning component.

Through adopting above-mentioned technical scheme, set up the guide roll, when processing, the film gets into tensioning assembly after the guide roll again, and the guide roll can lead to the film, takes place the skew in the prevention film is carried.

Optionally, the blade of the shaping knife is of a conical structure consistent with the slitting groove, and the taper of the shaping knife is set to be 5-30 degrees.

Through adopting above-mentioned technical scheme, through many experiments, find that the tapering of design sword is between 5-30, and the face angle of cutting of film area is the best, and the cable conductor comprehensive properties that film area processed at this moment is better.

Optionally, the included angle of the cutting edges of the dividing knife is set to be 45 degrees.

In summary, the present application includes at least one of the following beneficial technical effects:

1. the stretched film is pulled to be straightened, then the straightened film is shaped and cut, so that the error generated by the elastic bisection of the film can be effectively reduced, the processing precision of the PTFE special-shaped cable film is improved, the shape of the preliminary blank of the film can be shaped by pressing the dividing grooves on the film, then the film is cut, the processing precision of the PTFE special-shaped cable film can be further improved, and the diameter precision and the overall comprehensive performance of the cable produced by adopting the PTFE special-shaped cable film can be further improved;

2. through setting up tensioning assembly, design subassembly and slitting assembly, utilize tensioning assembly to pull the film and straighten, extend the film, reduce the elasticity of film and to the influence of cutting, then design film width through design subassembly, then cut the film that the design is good by slitting assembly, cut the film into the film strip of same width, can effectively improve the machining precision of film strip, and then improve the overall quality of cable;

3. through setting up the shaping subassembly and cutting the subassembly, install a plurality of sizing knives on the sizing knife roller, when processing, the film passes between sizing knife roller and the sizing roller, and the sizing knife can be on the film that stretches out divide the grooving, makes the film form preliminary film strip blank, and the film of pressing the grooving passes from cutting knife roller and cutting between the roller, cuts the sword and inserts and establish in the grooving of film and cut the film, cuts out the film strip of final edition, can improve the machining precision of film strip.

Drawings

FIG. 1 is a flow chart of a method of processing a PTFE profiled cable film in an embodiment of the present application;

fig. 2 is a schematic diagram of the overall structure of the PTFE special-shaped cable film processing apparatus according to the embodiment of the present application;

FIG. 3 is a schematic view showing the structure of a sizing knife;

fig. 4 is a schematic view showing the structure of the cutter.

Reference numerals: 01. a film strip; 011. cutting into sections; 02. a film; 021. dividing grooves; 2. a body; 3. unreeling the assembly; 31. an unreeling roller; 41. a tensioning member; 411. a tension roller; 412. a first press roller; 42. a traction member; 421. a traction roller; 422. a second press roller; 43. an adjusting roller; 5. shaping the assembly; 51. shaping a knife roller; 52. a shaping roller; 53. a sizing knife; 54. a first driven roller; 6. a slitting assembly; 61. a cutter roll; 62. a slitting roller; 63. a dividing knife; 64. a second driven roller; 7. a winding assembly; 71. a wind-up roll; 8. and a guide roller.

Detailed Description

In a first aspect, an embodiment of the present application discloses a method for processing a PTFE special-shaped cable film, referring to fig. 1, including the following steps:

s1, unreeling, namely unreeling the film 02 coil stock through equipment, and unreeling and conveying the film 02 to the next working procedure.

S2, pulling, stretching and tensioning the unreeled film 02 along the length direction through equipment, straightening the film 02, and overcoming the elastic force of the film 02 in the stretching process to make the tension of the film 02 very small, thereby reducing the influence of uneven slitting quality caused by stretching and shaking of the film 02.

S3, shaping, wherein the PTFE special-shaped cable film is of a strip-shaped structure with isosceles trapezoid cross section profile, and symmetrical dividing surfaces 011 are formed on two sides of the PTFE special-shaped cable film; by means of the forming cutters 53 with the same distance and interval, the stretched film 02 is pressed with notch grooves 021 to form PTFE shaped cable film blank between the notch grooves 021 and the notch grooves 021 have notch surfaces 011 on the two sides.

S4, slitting, namely cutting the shaped film 02 along the length direction of a slitting groove 021 by a plurality of slitting knives 63 which are arranged at equal intervals, and cutting and shaping the PTFE special-shaped cable film.

S5, winding, namely winding the cut PTFE special-shaped cable film through a winding roller 71.

The implementation principle of the PTFE special-shaped cable film processing method disclosed by the embodiment of the application is as follows: the stretching is carried out on the stretched film 02, so that the ductility of the film 02 in the cutting process is reduced, and then the stretched film 02 is shaped and cut, so that the error generated by the ductility of the film 02 in the split cutting process can be effectively reduced, and the processing precision of the PTFE special-shaped cable film is improved; through pressing out grooving 021 to film 02, can be to the preliminary blank shape design of film 02, then cut it again, the film 02 ductility of slitting groove 021 department is lower, can further improve the machining precision to PTFE dysmorphism cable membrane, and then can effectively improve the dimensional accuracy and the holistic comprehensive properties of cable.

In a second aspect, an embodiment of the application discloses a PTFE special-shaped cable film processing device, referring to fig. 2, including a machine body 2, and an unreeling component 3, a tensioning component, a shaping component 5, a slitting component 6 and a reeling component 7 which are mounted on the machine body 2; when the film 02 coiled material is used, the film 02 coiled material is unreeled through the unreeling component 3, the unreeled film 02 is pulled and flattened through the tensioning component, the shaping component 5 presses the slitting groove 021 on the flattened film 02, the slitting component 6 slits the film 02, and finally the slit film tape 01 is rolled through the rolling component 7.

Unreeling component 3 and rolling component 7 are installed respectively in the both ends of organism 2, unreeling component 3 include unreeling roller 31 and magnetic powder stopper, unreeling roller 31 rotate install on organism 2 and be connected with the magnetic powder stopper. During production, the film 02 coil stock is arranged on the unreeling roller 31, the film 02 is conveyed and pulled outwards by the tensioning assembly, and the magnetic powder brake can maintain stable tension control in the unreeling process of the film 02.

The tensioning assembly is located between the unreeling assembly 3 and the reeling assembly 7, and comprises a tensioning member 41 and a traction member 42, wherein the tensioning member 41 is located on the side close to the unreeling assembly 3, and the traction member 42 is located on the side close to the reeling assembly 7. The tensioning member 41 includes a tensioning roller 411 and a first pressing roller 412, both of the tensioning roller 411 and the first pressing roller 412 are parallel to the unreeling roller 31 and rotatably mounted on the machine body 2, the film 02 passes between the first pressing roller 412 and the tensioning roller 411, and the first pressing roller 412 presses the film 02 on the tensioning roller 411.

The traction component 42 comprises a traction roller 421, a driving piece for driving the traction roller 421 to rotate and a second compression roller 422 compressed on the traction roller 421, wherein the traction roller 421 and the second compression roller 422 are parallel to the unreeling roller 31 and are rotatably arranged on the machine body 2, the driving piece is arranged as a servo motor, a rotating shaft of the driving piece is connected with the traction roller 421 and drives the traction roller 421 to rotate, and the traction roller 421 and the tensioning roller 411 are in transmission through a synchronous belt, so that the tensioning roller 411 and the traction roller 421 synchronously rotate. In the production process, the film 02 passes through the space between the traction roller 421 and the second compression roller 422, the second compression roller 422 compresses the film 02 on the traction roller 421, and the traction roller 421 and the tension roller 411 rotate to drive and convey the film 02.

The tensioning assembly further comprises an adjusting roller 43 for adjusting the tension of the film 02, the adjusting roller 43 being parallel to the unreeling roller 31, the adjusting roller 43 being located between the tensioning member 41 and the traction member 42; the two ends of the regulating roller 43 are slidably mounted on the machine body 2 in the radial direction, and the two ends of the regulating roller 43 are driven to synchronously move by the air cylinders. In use, the tension of the film 02 is controlled by the cylinder-driven dancer 43.

Referring to fig. 2 and 3, the setting assembly 5 is located at one side of the adjusting roller 43 near the tension member 41, and the setting assembly 5 includes a setting blade 53 roller 51, a setting roller 52, and a setting blade 53 coaxially fixed to the setting blade 53 roller 51; the shaping knife 53 is a round knife, the knife edge of the shaping knife 53 is of an isosceles trapezoid structure which is gradually reduced away from the center, the side inclination angle of the isosceles trapezoid is a, and the value of a is 5-30 degrees; the sizing knife 53 is provided in plural at equal intervals on the roll 51 of the sizing knife 53. The two ends of the roller 51 of the shaping knife 53 are arranged on the machine body 2 in a sliding way along the radial direction, and the two ends of the roller 51 of the shaping knife 53 are driven by an air cylinder to be close to or far away from the shaping roller 52, and the two ends of the shaping roller 52 are rotatably arranged on the machine body 2. During production, the stretched film 02 passes through the space between the shaping knife 53 roller 51 and the shaping roller 52, the cylinder drives the shaping knife 53 roller 51 to be close to the shaping roller 52, the shaping knife 53 is pressed on the film 02, and the shaping knife 53 presses the dividing grooves 021 on the film 02 in the conveying process of the film 02.

The first driven roller 54 is rotatably arranged on the machine body 2 at the lower side of the shaping roller 52, and the first driven roller 54 presses the film 02 on the shaping roller 52, so that the contact area between the film 02 and the shaping roller 52 can be effectively increased.

Referring to fig. 2 and 3, the slitting assembly 6 is positioned on the side of the regulating roller 43 adjacent to the traction member 42, and the slitting assembly 6 includes a slitting roller 61, a slitting roller 62, and a slitting knife 63 coaxially fixed to the slitting roller 61. The cutting knife 63 is a circular knife, and the included angle of the cutting edge of the cutting knife 63 is set to be 45 degrees; a plurality of slitting knives 63 are arranged on the slitting knife roller 61 at equal intervals at positions corresponding to the sizing knives 53, and the slitting knives 63 are in one-to-one correspondence with the sizing knives 53. The two ends of the slitting roller 61 are slidably mounted on the machine body 2 in the radial direction, and the slitting roller 61 is driven by an air cylinder to approach or separate from the slitting roller 62, and the slitting roller 62 is rotatably mounted on the machine body 2. In the production process, the film 02 pressed with the slitting groove 021 passes through the space between the slitting knife roller 61 and the slitting roller 62, and the air cylinder drives the slitting knife roller 61 to be close to the slitting roller 62, so that the slitting knife 63 is inserted into the slitting groove 021 of the film 02 and the film 02 is slit.

A second driven roller 64 is rotatably arranged on one side of the slitting roller 62 on the machine body 2, the second driven roller 64 presses the film 02 on the slitting roller 62, the contact between the film 02 and the slitting roller 62 is increased, and the film 02 is prevented from being displaced in the cutting process.

A guide roller 8 is mounted on the machine body 2 between the unreeling assembly 3 and the tensioning member 41, and the unreeled film 02 enters the tensioning member 41 after being guided by the guide roller 8.

The winding assembly 7 comprises a winding roller 71 and a driving motor for driving the winding roller 71 to rotate, and the winding roller 71 is rotatably arranged on the machine body 2 and is used for winding the cut film strip 01.

The implementation principle of the PTFE special-shaped cable film processing equipment disclosed by the embodiment of the application is as follows: the tension component is used for pulling and stretching the film 02, so that the elasticity of the film 02 is eliminated, the vibration and the extension of the film 02 in the slitting process are reduced, and the cutting precision of the film strip 01 can be improved; pressing a dividing groove 021 on the stretched film 02 through a shaping assembly 5, and then cutting the dividing groove 021 through a cutting assembly 6; when cutting, the film 02 at the position of the cutting groove 021 is low in thickness and elasticity, so that the cutting precision can be further improved, and the processing precision of the film strip 01 is further improved.

The foregoing are all preferred embodiments of the present application, and are not intended to limit the scope of the present application in any way, therefore: all equivalent changes in structure, shape and principle of this application should be covered in the protection scope of this application.

Claims (10)

1. The processing method of the PTFE special-shaped cable film is characterized by comprising the following steps of:

s1, unreeling, namely unreeling a film (02) coiled material through unreeling equipment;

s2, pulling, tensioning the unreeled film (02), and straightening the film (02);

s3, shaping, namely setting the PTFE special-shaped cable film into a strip-shaped structure with isosceles trapezoid cross section profile, forming symmetrical cutting surfaces (011) on two sides of the PTFE special-shaped cable film, extruding cutting grooves (021) on the straightened film (02) through a plurality of shaping cutters (53), forming blanks of the PTFE special-shaped cable film between the adjacent cutting grooves (021), and enabling groove walls on two sides of the cutting grooves (021) to be consistent with the cutting surfaces (011);

s4, slitting, namely cutting the PTFE special-shaped cable film into a shape by a plurality of slitting knives (63) along the length direction of a slitting groove (021);

s5, winding, namely winding the cut PTFE special-shaped cable film through a winding roller (71).

2. The method for processing the special-shaped cable film of PTFE according to claim 1, wherein in the step S2, when the film (02) is pulled, the elastic force of the film (02) is required to be overcome, so that the tension of the film (02) is close to zero, and uneven cutting caused by shaking or stretching of the film (02) in the shaping and cutting processes is reduced.

3. A PTFE special-shaped cable film processing apparatus adopting the PTFE special-shaped cable film processing method according to any one of claims 1 to 2, characterized by comprising: organism (2), be provided with on organism (2) be used for to film (02) unreel subassembly (3), to film (02) stretch out and carry tensioning assembly and be used for rolling PTFE dysmorphism cable membrane's rolling subassembly (7) after unreeling still be provided with on organism (2) and be used for pressing out on film (02) and divide shaping subassembly (5) of grooving (021) and be used for cutting subassembly (6) of film (02).

4. A PTFE special-shaped cable film processing apparatus according to claim 3, wherein the shaping assembly (5) comprises a shaping knife (53) roller (51), a shaping roller (52) and shaping knives (53) coaxially fixed on the shaping knife (53) roller (51), the shaping knives (53) are uniformly distributed along the length direction of the shaping knife (53) roller (51), the shaping knife (53) roller (51) and the shaping roller (52) are rotatably mounted on the machine body (2) in parallel with each other, the film (02) passes through the shaping knife (53) roller (51) and the shaping roller (52), and the shaping knives (53) are crimped on the film (02).

5. The special-shaped cable film processing device according to claim 4, wherein the slitting assembly (6) comprises a slitting knife roller (61), a slitting knife roller (62) and slitting knives (63) coaxially fixed on the slitting knife roller (61), the slitting knives (63) are uniformly distributed along the length direction of the slitting knife roller (61), the slitting knife roller (61) and the slitting knife roller (62) are mutually parallel and rotatably arranged on the machine body (2), the slitting knife roller (61) and the slitting knife roller (62) are positioned on one side, close to the winding assembly (7), of the sizing assembly (5), the slitting knives (63) are in one-to-one correspondence with the sizing knife (53), the film (02) passes through the slitting knife roller (61) and the slitting knife roller (62), and the slitting knife (63) is inserted in the slitting groove (021) and cuts the film (02).

6. PTFE special-shaped cable film processing device according to claim 5, wherein the tensioning assembly comprises a tensioning element (41) and a traction element (42), the tensioning element (41) being located on the side of the sizing assembly (5) close to the unreeling assembly (3), the traction element (42) being located on the side of the slitting assembly (6) close to the reeling assembly (7); the tensioning component (41) comprises a tensioning roller (411) and a first compression roller (412) pressed on the tensioning roller (411), and a film (02) passes through between the tensioning roller (411) and the first compression roller (412); the traction component (42) comprises a traction roller (421), a second compression roller (422) pressed on the traction roller (421) and a driving piece for driving the traction roller (421) to rotate, and the tensioning roller (411) and the traction roller (421) synchronously rotate.

7. The PTFE special-shaped cable film processing device according to claim 6, wherein the tensioning assembly further comprises an adjusting roller (43), and the adjusting roller (43) is slidably arranged on the machine body (2) between the shaping assembly (5) and the slitting assembly (6) for adjusting the tightness of the film (02).

8. A PTFE special-shaped cable film processing device according to claim 3, wherein a guide roller (8) for guiding the film (02) is further mounted on the machine body (2), and the guide roller (8) is positioned between the unreeling assembly (3) and the tensioning assembly.

9. The PTFE special-shaped cable film processing device according to claim 4, wherein the blade edge of the shaping blade (53) is provided in a tapered structure consistent with the slitting groove (021), and the taper of the shaping blade (53) is provided at 5-30 °.

10. PTFE special-shaped cable film processing device according to claim 5, wherein the cutting edge angle of the slitting knife (63) is set to 45 °.