CN113201812A - Full-automatic production line and production process for PTFE split fiber twisted yarn - Google Patents
Full-automatic production line and production process for PTFE split fiber twisted yarn Download PDFInfo
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- CN113201812A CN113201812A CN202110604508.2A CN202110604508A CN113201812A CN 113201812 A CN113201812 A CN 113201812A CN 202110604508 A CN202110604508 A CN 202110604508A CN 113201812 A CN113201812 A CN 113201812A
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- 238000004804 winding Methods 0.000 claims abstract description 43
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Classifications
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- D—TEXTILES; PAPER
- D01—NATURAL OR MAN-MADE THREADS OR FIBRES; SPINNING
- D01H—SPINNING OR TWISTING
- D01H1/00—Spinning or twisting machines in which the product is wound-up continuously
-
- D—TEXTILES; PAPER
- D01—NATURAL OR MAN-MADE THREADS OR FIBRES; SPINNING
- D01D—MECHANICAL METHODS OR APPARATUS IN THE MANUFACTURE OF ARTIFICIAL FILAMENTS, THREADS, FIBRES, BRISTLES OR RIBBONS
- D01D5/00—Formation of filaments, threads, or the like
- D01D5/42—Formation of filaments, threads, or the like by cutting films into narrow ribbons or filaments or by fibrillation of films or filaments
- D01D5/423—Formation of filaments, threads, or the like by cutting films into narrow ribbons or filaments or by fibrillation of films or filaments by fibrillation of films or filaments
-
- D—TEXTILES; PAPER
- D01—NATURAL OR MAN-MADE THREADS OR FIBRES; SPINNING
- D01H—SPINNING OR TWISTING
- D01H13/00—Other common constructional features, details or accessories
- D01H13/04—Guides for slivers, rovings, or yarns; Smoothing dies
-
- D—TEXTILES; PAPER
- D02—YARNS; MECHANICAL FINISHING OF YARNS OR ROPES; WARPING OR BEAMING
- D02G—CRIMPING OR CURLING FIBRES, FILAMENTS, THREADS, OR YARNS; YARNS OR THREADS
- D02G3/00—Yarns or threads, e.g. fancy yarns; Processes or apparatus for the production thereof, not otherwise provided for
- D02G3/02—Yarns or threads characterised by the material or by the materials from which they are made
-
- D—TEXTILES; PAPER
- D02—YARNS; MECHANICAL FINISHING OF YARNS OR ROPES; WARPING OR BEAMING
- D02J—FINISHING OR DRESSING OF FILAMENTS, YARNS, THREADS, CORDS, ROPES OR THE LIKE
- D02J1/00—Modifying the structure or properties resulting from a particular structure; Modifying, retaining, or restoring the physical form or cross-sectional shape, e.g. by use of dies or squeeze rollers
- D02J1/22—Stretching or tensioning, shrinking or relaxing, e.g. by use of overfeed and underfeed apparatus, or preventing stretch
-
- D—TEXTILES; PAPER
- D10—INDEXING SCHEME ASSOCIATED WITH SUBLASSES OF SECTION D, RELATING TO TEXTILES
- D10B—INDEXING SCHEME ASSOCIATED WITH SUBLASSES OF SECTION D, RELATING TO TEXTILES
- D10B2321/00—Fibres made from polymers obtained by reactions only involving carbon-to-carbon unsaturated bonds
- D10B2321/04—Fibres made from polymers obtained by reactions only involving carbon-to-carbon unsaturated bonds polymers of halogenated hydrocarbons
- D10B2321/042—Fibres made from polymers obtained by reactions only involving carbon-to-carbon unsaturated bonds polymers of halogenated hydrocarbons polymers of fluorinated hydrocarbons, e.g. polytetrafluoroethene [PTFE]
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- Engineering & Computer Science (AREA)
- Textile Engineering (AREA)
- Mechanical Engineering (AREA)
- Yarns And Mechanical Finishing Of Yarns Or Ropes (AREA)
Abstract
本发明公开了一种PTFE裂膜纤维加捻纱全自动生产线及生产工艺，包括一用于将PTFE薄膜进行连续加热、拉伸处理的拉伸烧结装置；一用于将拉伸烧结完成的PTFE薄膜进行开纤，获得PTFE长丝细纤维束的裂膜开纤装置；一用于将裂膜开纤获得的PTFE长丝细纤维束进行加热、拉伸处理的二次热拉伸装置；一用于将加热、拉伸处理完成后的PTFE长丝细纤维束进行加捻形成加捻纱的的加捻卷绕装置；本发明获得的加捻纱强力高、均匀度好，能够实现连续自动化生产。
The invention discloses a fully automatic production line and production process for PTFE split-film fiber twisted yarn, comprising a stretching and sintering device for continuously heating and stretching a PTFE film; The film is opened to obtain a split film opening device for PTFE filament thin fiber bundles; a secondary thermal stretching device for heating and stretching the PTFE filament thin fiber bundles obtained by split film opening; one A twisting and winding device for twisting the PTFE filament thin fiber bundles after heating and stretching treatment to form twisted yarns; the twisted yarns obtained by the present invention have high strength and good uniformity, and can realize continuous automation Production.
Description
Technical Field
The invention belongs to the technical field of textile equipment, and particularly relates to a full-automatic production line and a production process for PTFE split fiber twisted yarn.
Background
Polytetrafluoroethylene (PTFE), also known as Teflon, is known as "Plastic king". The polytetrafluoroethylene fiber has excellent characteristics, and is an important material which is indispensable for solving a plurality of key technologies and improving the production technology level in the fields of scientific research, military industry, civil use and the like. At present, the polytetrafluoroethylene fiber is widely applied in the fields of chemical industry, petroleum, textile, medical treatment, machinery and the like, and is also a preferred material in the fields of waste incineration, space suit, fire-fighting suit, filtering material, space material and the like. The polytetrafluoroethylene fiber has excellent performance due to the special structural characteristics of the polytetrafluoroethylene molecules: the application temperature range is wide, and the long-time application temperature of the polytetrafluoroethylene is-190-260 ℃; the polytetrafluoroethylene fiber has the advantages of outstanding non-stick property and lubricating property, lowest surface tension minimum friction factor in the existing synthetic fiber, no adhesion of substances and high lubricating property; the insulating property is good, the material is a high-degree nonpolar material, and the material has prominent dielectricity and large resistance; the chemical stability is good, the chemical stability of the polytetrafluoroethylene fiber is excellent, and the polytetrafluoroethylene fiber is inert to most chemicals and solvents; the polytetrafluoroethylene fiber has good flame retardance, the limited oxygen index of the polytetrafluoroethylene fiber is up to 95 percent, and the spread of flame can be effectively controlled in a high-temperature environment; excellent ageing resistance, stability to ultraviolet rays, and no obvious change of mechanical properties of the polytetrafluoroethylene fibers after outdoor exposure for 15 years. Therefore, the polytetrafluoroethylene material has wide application space.
The membrane-splitting spinning method is one of the common methods for producing polytetrafluoroethylene fibers, and the production process of the polytetrafluoroethylene fibers comprises the steps of pretreating polytetrafluoroethylene resin, adding purified solvent oil, mixing, kneading, carrying out constant-temperature treatment, carrying out metering, then carrying out extrusion, pushing, surface treatment, rolling and drying, carrying out three-dimensional stretching and then forming a qualitative membrane, carrying out high-temperature pre-stretching and retraction on the membrane, carrying out high-temperature secondary stretching on the membrane, carrying out membrane-splitting, and then stretching, heating and stretching a cut polytetrafluoroethylene film by a traction roller to finally obtain the polytetrafluoroethylene fibers. The fiber produced by the membrane cracking method can be mainly used as a sealing material, and the polytetrafluoroethylene short fiber can also be processed into a needle felt and the like.
CN 102051703B discloses a method for manufacturing polytetrafluoroethylene fibers by a membrane splitting method, which has high strength, good uniformity and low production cost, and comprises the following steps: polytetrafluoroethylene micropowder + lubricant → mixing → stirring → standing → precompression shaping → push-press shaping → calendering shaping → drying → splitting → first heat drafting → second heat drafting → heat setting → rolling, to produce high-strength polytetrafluoroethylene fiber, wherein the temperature from drying, splitting, first heat drafting and second heat drafting to heat setting is increased in sequence in the production process.
CN 206858773U discloses a needling device and polytetrafluoroethylene split fiber carding machine including the same, the needling device includes preceding upper needling roller, preceding lower needling roller, back upper needling roller, back lower needling roller, the distance between arbitrary two adjacent felting needles on the preceding upper needling roller, the distance between arbitrary two adjacent felting needles on the preceding lower needling roller are all greater than the distance between arbitrary two adjacent felting needles on the back upper needling roller, the distance between arbitrary two adjacent felting needles on the back lower needling roller.
CN 106637451A is a preparation method of polytetrafluoroethylene microfiber, the main process of the invention comprises: stirring polytetrafluoroethylene dispersion resin into paste, extruding, rolling into a belt, deoiling, sintering, stretching, splitting and rolling; and (3) re-stretching and re-splitting the coiled polytetrafluoroethylene filament fine fibers to obtain polytetrafluoroethylene microfibers with the fineness less than or equal to 1 Dtex.
The above patent documents show that the prior art of preparing polytetrafluoroethylene fibers by using polytetrafluoroethylene films all uses polytetrafluoroethylene films to prepare polytetrafluoroethylene fibers, but how to directly prepare and obtain polytetrafluoroethylene twisted yarns from polytetrafluoroethylene films becomes a problem which puzzles technicians in the field at present.
Disclosure of Invention
Aiming at the defects in the prior art, the invention aims to provide a full-automatic production line and a production process for twisted PTFE split fiber yarn, which have high strength and good uniformity of the obtained twisted yarn and can realize continuous automatic production.
In order to solve the technical problems, the technical scheme adopted by the invention is as follows: a full-automatic production line for twisting PTFE split fiber comprises a stretching and sintering device for continuously heating and stretching a PTFE film;
a splitting and splitting device for splitting the stretched and sintered PTFE film to obtain PTFE filament fiber bundles;
a secondary hot stretching device for heating and stretching PTFE filament fiber bundles obtained by splitting and splitting the film;
a twisting and winding device for twisting the PTFE filament fine fiber bundle after the heating and stretching treatment to form twisted yarn;
the twisting and winding device comprises a twisting mechanism and a winding mechanism matched with the twisting mechanism and used for winding formed twisted yarn, wherein the twisting mechanism comprises a twisting cylinder body which is arranged along the horizontal direction and is provided with a cavity, and a first power mechanism used for driving the twisting cylinder body to rotate along the axial direction at a constant speed, a twisting hole communicated with the cavity is formed in the twisting cylinder body, a twisting rod which rotates synchronously with the twisting cylinder body is arranged on the twisting cylinder body along the axial direction of the twisting cylinder body and deviates from the axial position of the twisting cylinder body, a cavity which allows PTFE filament fine fiber bundles to penetrate through the cavity, penetrate out of the twisting hole, is wound outside the twisting cylinder body and then enters the twisting rod and is provided with two openings at two ends is arranged in the twisting rod, a guide component used for uniformly winding the twisted yarn output from the cavity on the winding mechanism is arranged at the end part of the twisting rod, the winding mechanism comprises a yarn which is coaxial with the twisting cylinder body, and a second power mechanism for driving the yarn bobbin to reciprocate axially at a constant speed when the twisting barrel rotates.
The full-automatic production line for the PTFE split fiber twisted yarn comprises a guide component and a pressing component, wherein one end of the guide component is arranged on a twisting rod, the other end of the guide component is elastically pressed and connected with the surface of a yarn bobbin, the pressing component is arranged at the contact end of the guide rod and the yarn bobbin, the pressing component is provided with a pressing hole used for winding the twisted yarn which is twisted on the surface of the guide rod, guiding the twisted yarn to be pressed and uniformly wound on the yarn bobbin, and the pressing component is in relative sliding connection along the surface of the yarn bobbin when the yarn bobbin moves in a reciprocating mode.
The full-automatic production line for the PTFE split fiber twisted yarn comprises a box body with a sealed stretching sintering chamber, a temperature control component for heating the stretching sintering chamber, an unreeling device for conveying a PTFE film into the stretching sintering chamber, a first roller set for outputting the stretched, sintered and shaped PTFE film and conveying the stretched, sintered and shaped PTFE film to the split fiber opening device, a plurality of stretching roller assemblies for performing constant force stretching treatment on the PTFE film and a third power mechanism for driving the stretching roller assemblies to rotate at a constant speed are arranged in the stretching sintering chamber along the conveying direction of the PTFE film.
The PTFE split fiber twisted yarn full-automatic production line comprises two traction guide roller sets which are arranged at a feeding end and a discharging end and used for conveying PTFE films, a pre-splitting roller and a secondary splitting roller which are used for splitting the PTFE films and a fourth power mechanism which drives the pre-splitting roller and the secondary splitting roller to rotate at a constant speed respectively are sequentially arranged along the conveying direction of the PTFE films, and the rotating directions of the pre-splitting roller and the secondary splitting roller are consistent with the moving direction of the PTFE films.
The full-automatic production line for the PTFE split fiber twisted yarn comprises a hot stretching box body, wherein a stretching roller set used for stretching PTFE filament fine fiber bundles and an electric heating element used for heating the hot stretching box body are arranged in the hot stretching box body, the secondary hot stretching multiple is 0.1-3 times, and the temperature of the hot stretching box body is 220-320 ℃.
In the full-automatic production line for the PTFE split fiber twisted yarn, the output end of the secondary hot stretching device or the input end of the twisting and winding device is provided with a control component for driving the PTFE filament fine fiber bundle to enter the cavity of the twisting cylinder body along the inclined direction.
The full-automatic production line for the PTFE split fiber twisted yarn comprises a control component and a guide roller wheel, wherein the guide roller wheel is used for changing the conveying direction of the PTFE filament fine fiber bundle.
According to the full-automatic production line for the PTFE split fiber twisted yarn, the inclination angle of the PTFE filament fine fiber bundle entering the cavity of the twisting cylinder along the inclination direction is set to be 20-50 degrees.
In the full-automatic production line for the PTFE split fiber twisted yarn, the rotating speed of the twisting cylinder is set to be 60-600r/min, and the reciprocating speed of the yarn bobbin is 2-20 cm/min.
A full-automatic production process of PTFE split fiber twisted yarn comprises the following steps:
(1) manually penetrating a PTFE film into the box body through the unwinding device, sequentially winding the PTFE film on the stretching roller assembly, connecting the stretching roller assembly with the first roller assembly, starting the temperature control component, heating the temperature control component to the temperature required by the stretching sintering chamber, starting the third power mechanism, operating the stretching roller assembly and normally operating the equipment;
(2) the PTFE film after stretching and sintering is output from a first roller set of a stretching and sintering device, enters a film splitting and fiber opening device from a feeding end through a traction guide roller set, is placed on a pre-fiber opening roller and a secondary fiber opening roller, a fourth power mechanism is started, the pre-fiber opening roller and the secondary fiber opening roller rotate at a constant speed, is subjected to pre-fiber opening through the pre-fiber opening roller, is subjected to secondary fiber opening through the secondary fiber opening roller to form a PTFE filament fine fiber bundle, and is finally output through the traction guide roller set at a discharging end to enter a secondary hot stretching device;
(3) starting the electric heating element to heat to the temperature required by the hot stretching box body, then enabling the PTFE filament fiber bundle to enter the hot stretching box body, and stretching the PTFE filament fiber bundle by the stretching roller group;
(4) and the PTFE filament fine fiber bundle penetrates into the twisting barrel from the opening of the cavity of the twisting barrel in an inclined mode, penetrates out of the twisting hole, is wound outside the twisting barrel and enters the twisting rod, twisted yarn which is twisted is wound on the surface of the guide rod, is guided to be compressed and is uniformly wound on the crimping hole of the yarn bobbin, and is wound on the yarn bobbin, the second power mechanism is started, the yarn bobbin moves in a reciprocating mode along the axial direction of the yarn bobbin at a constant speed, the twisted yarn is continuously and uniformly wound on the yarn bobbin, and the yarn bobbin is wound into a bobbin.
The full-automatic production line and the production process for the PTFE split fiber twisted yarn have the advantages that: in the design research, the modularized design thinking in the industrial design is applied to the research of polytetrafluoroethylene yarn production equipment, and each module of the stretching and sintering device, the film splitting and fiber opening device, the secondary hot stretching device and the twisting and winding device can be independently designed, modified, manufactured and stored, so that the system has relative independence, the whole system is simpler and more efficient, and the system is a continuous and full-automatic efficient production system; the splitting and fiber opening device adopts an upper group of polytetrafluoroethylene films and a lower group of polytetrafluoroethylene films which are stretched and sintered to simultaneously open fibers and simultaneously act on a big thorn wheel, so that the space is saved, the efficiency is improved, the big thorn wheel utilizes the principle of a centrifugal fan and is additionally provided with a shielding protective cover, fine fibers generated in fiber opening can be collected, the winding on the thorn wheel is reduced, and meanwhile, the safety measure is enhanced; the twisting and winding device greatly improves the twisting and winding efficiency by arranging the twisting mechanism and the winding mechanism in a matching way, and effectively improves the twisting quality by controlling the inclination angle of the PTFE filament fiber bundle entering the twisting cylinder.
The novel polytetrafluoroethylene yarn prepared by the invention has the characteristics of high strength and good uniformity, fills up the blank of the field, can be widely applied to the fields of high-temperature sealing, high-temperature resistant material sewing and the like, and has remarkable economic and social benefits and polishing application value. The PTFE twisted yarn is directly produced from the PTFE film, so that the aim of full-automatic continuous production is fulfilled, and the production efficiency is effectively improved.
Drawings
FIG. 1 is a schematic view of the overall structure of the present invention;
FIG. 2 is a schematic structural view of a stretch sintering apparatus;
FIG. 3 is a schematic structural diagram of a splitting and fiber-opening device;
FIG. 4 is a schematic structural view of a secondary hot stretching apparatus;
FIG. 5 is a schematic view of the twisting and winding apparatus;
fig. 6 is a partially enlarged schematic view of a portion a in fig. 5.
Detailed Description
The invention is further explained in detail with reference to the drawings and the specific embodiments;
as shown in figure 1, a full-automatic production line of PTFE split fiber twisted yarn comprises a stretching and sintering device 1 for continuously heating and stretching a PTFE film 9; a splitting and splitting device 2 for splitting the stretched and sintered PTFE film 9 to obtain PTFE filament fiber bundles 13; a secondary hot stretching device 3 for heating and stretching the PTFE filament fiber bundle 13 obtained by splitting and opening the film; a twisting and winding device 4 for twisting the PTFE filament fiber bundle 13 after the heating and stretching treatment is finished to form a twisted yarn 14.
As shown in fig. 2, the stretch sintering apparatus 1 includes a box 6 having a sealed stretch sintering chamber 5, a temperature control component 7 for heating the stretch sintering chamber 5, and the working temperature environment in the stretch sintering chamber 5 is 220-240 ℃. The temperature control part 7 can adopt electric heating pipes or other electric heating elements which can be heated and are commonly used in the market at present, and the installation number and the installation position are not particularly limited so as to reach the temperature of the stretching sintering chamber 5. A door for sealing the stretch-sintering chamber 5 is provided on the box 6, and is not shown in the drawings for clarity of technical features in the box 6 of the present application. In order to ensure the temperature equalization in the stretch sintering chamber 5, two circulating heat blowers 8 for equalizing the temperature in the entire stretch sintering chamber 5 are installed in the stretch sintering chamber 5, and the circulating heat blowers 8 are installed at diagonal positions in the stretch sintering chamber 5. An unreeling device 10 used for conveying the PTFE film 9 into the stretching and sintering chamber 5 is arranged on one side of the box body 6, a first roller set 11 used for outputting the stretched, sintered and shaped PTFE film 9 and conveying the stretched, sintered and shaped PTFE film to the splitting and fiber opening device 2 is arranged on the other side of the box body, a plurality of stretching roller assemblies 12 used for performing constant force stretching processing on the PTFE film 9 and a third power mechanism driving the stretching roller assemblies 12 to rotate at a constant speed are arranged in the stretching and sintering chamber 5 along the conveying direction of the PTFE film 9, the third power mechanism can select a transmission mode of matching a servo motor with a gear and a chain and is used for driving the stretching roller assemblies 12 to rotate at a constant speed, and the transmission mechanism is the prior art and is not described herein.
As shown in fig. 3, the splitting and fiber-opening device 2 includes two traction guide roller sets 17 respectively disposed at the feed end 15 and the discharge end 16 and used for conveying the PTFE film 9, and a pre-opening roller 18 and a secondary opening roller 19 for opening the PTFE film 9 are sequentially disposed along the conveying direction of the PTFE film 9, wherein the pre-opening roller 18 includes two pairs of small punching rollers 20 with card clothing and used for punching and pre-opening the PTFE film 9, the secondary opening roller 19 includes a large punching roller 21 with card clothing and used for further opening the PTFE film 9 subjected to pre-opening, the pre-opening roller 18 employs a needle-shaped roller, 20-50 needles are disposed on each square centimeter of the small punching roller 20, and 35-80 needles are disposed on each square centimeter of the large punching roller 21 of the secondary opening roller 19. Certainly, according to the use of the actual fiber, different fiber opening requirements can be obtained by adjusting, the pre-opening roller 18 and the secondary opening roller 19 can adopt a needle and needle type or needle and knife type opening mode, that is, the secondary opening roller uses a blade structure to replace card clothing, and 30-60 blades are arranged on each centimeter of roller in a crossed manner.
In order to collect the tiny fiber generated in the fiber opening process in time and reduce the winding on the secondary fiber opening roller 19, a shielding protective cover 22 used for preventing the fiber from flying in a mess and protecting the operation safety of workers is arranged outside the big licker-in 21, a centrifugal fan 23 used for collecting the redundant tiny fiber generated in the fiber opening process of the PTFE film 9 and a detachable collecting plate 24 used for collecting the adsorbed tiny fiber are arranged in the shielding protective cover 22 and close to the position below the contact position of the big licker-in 21 and the PTFE film 9, and a fourth power mechanism used for driving the pre-opening roller 18 and the secondary fiber opening roller 19 to rotate at a constant speed is respectively arranged in the film opening device 2. The fourth power mechanism is also the prior art in the field, and can drive the traction guide roller set 17 to rotate at the same time, or can be provided with a driving mechanism of the traction guide roller set 17 separately, and a transmission mode of a servo motor and a gear, a chain or a belt wheel and a belt is not marked in the drawing. In order to ensure more uniform fibers obtained when the PTFE film 9 is opened, the rotation directions of the pre-opening roller 18 and the secondary opening roller 19 are set to coincide with the movement direction of the PTFE film 9.
As shown in fig. 4, the secondary hot stretching device 3 includes a hot stretching box 25, a stretching roller set 26 for stretching the PTFE filament bundle 13 is provided in the hot stretching box 25, and an electric heating element 27 for heating the hot stretching box 25, and the electric heating element 27 may be an electric heating tube or an electric heating wire commonly used in the market at present. The secondary hot stretching multiple of the stretching roller set 26 is 0.1-3 times, and the temperature in the hot stretching box 25 is 220-320 ℃.
As shown in fig. 5 and 6, the twisting and winding device 4 includes a twisting mechanism 28 and a winding mechanism 29 cooperating with the twisting mechanism 28 for winding the formed twisted yarn 14, the twisting mechanism 28 includes a twisting cylinder 31 having a cavity 30 and arranged along the horizontal direction, and a first power mechanism for driving the twisting cylinder 31 to rotate at a constant speed along the axial direction thereof, a twisting hole 32 communicating with the cavity 30 is formed on the twisting cylinder 31, a twisting rod 33 rotating synchronously with the twisting cylinder 31 is arranged on the twisting cylinder 31 at a position deviating from the axial direction thereof along the axial direction of the twisting cylinder 31, and a cavity 34 having two open ends is arranged inside the twisting rod 33 for allowing the PTFE filament fine fiber bundle 13 to pass through the cavity 30, pass through the twisting hole 33, and wind around the outside of the twisting cylinder 31. The PTFE filament fine fiber bundle 13 passes out of the twisting hole 32, and then is wound 3/4 times on the cylindrical surface of the twisting cylinder 31, and then enters the cavity 34 of the twisting rod 33. A balance weight 35 symmetrical to twisting rod 33 is mounted on twisting cylinder 31. At the end of the twisting rod 33, near the winding mechanism 29, there is provided a guide member 36 for uniformly winding the twisted yarn 14 outputted from the cavity 34 after twisting onto the winding mechanism 23, and the winding mechanism 29 includes a yarn bobbin 37 coaxially disposed with the twisting cylinder 31, and a second power mechanism for driving the yarn bobbin to reciprocate at a constant speed in the axial direction thereof when the twisting cylinder 31 rotates. The guide member 36 includes a guide rod 38 having one end disposed on the twisting rod 33 and the other end elastically pressed and connected to the surface of the yarn bobbin 37, a pressing member 39 is disposed at a contact end of the guide rod 38 and the yarn bobbin 37, a pressing hole 40 for winding the twisted yarn 14 twisted on the surface of the guide rod 38 and guiding the twisted yarn 14 to be pressed and uniformly wound on the yarn bobbin 37 is formed in the pressing member 39, and the pressing member 39 is slidably connected along the surface of the yarn bobbin 37 when the yarn bobbin 37 reciprocates. The twisted yarn 14 is wound on the surface of the guide bar 38 for 2-3 turns. The first power mechanism and the second power mechanism are both commonly used components such as a motor, a gear, a telescopic shaft, etc., and are not described herein for the prior art. The rotating speed of the twisting cylinder 31 is set to be 60-600r/min, and the reciprocating speed of the yarn bobbin 37 is 2-20 cm/min.
In order to ensure the twisting quality, the output end of the secondary hot stretching device 3 or the input end of the twisting and winding device 4 is provided with a control component for driving the PTFE filament fiber bundle 13 to enter the cavity 30 of the twisting cylinder 31 along the inclined direction. The control means includes a guide roller 41 for changing the feeding direction of the PTFE filament tow 13. The optimal twisting inclination angle of the PTFE filament fine fiber bundle 13 entering the cavity 30 of the twisting cylinder 31 along the inclination direction is set to be 20-50 degrees.
As shown in fig. 1 to 5, in order to improve the production efficiency of twisted yarn, the present application may simultaneously perform stretching and sintering, splitting and opening, secondary thermal stretching, twisting and winding processes on two sets of PTFE films. Of course, according to the actual production needs and the design requirements of the equipment and the plant, one or more groups can be set to be performed simultaneously, and the method is not limited by the technical scheme of the application.
The invention relates to a full-automatic production process of PTFE split fiber twisted yarn, which comprises the following steps:
(1) manually penetrating a PTFE film 9 into a box body 6 through an unwinding device 10, sequentially winding the PTFE film on a stretching roller assembly 12, connecting the stretching roller assembly 12 with a first roller assembly 11, starting a temperature control component 7, heating the temperature to the temperature required by a stretching sintering chamber 5, starting a third power mechanism, operating the stretching roller assembly 12, and normally operating the equipment;
(2) the PTFE film 9 after stretching and sintering is output from a first roller set 11 of a stretching and sintering device 1, enters a film splitting and fiber opening device 2 from a feeding end 15 through a traction guide roller set 17, the PTFE film 9 is placed on a pre-fiber opening roller 18 and a secondary fiber opening roller 19, a fourth power mechanism is started, a centrifugal fan 23 is started at the same time, the pre-fiber opening roller 18 and the secondary fiber opening roller 19 rotate at a constant speed, pre-fiber opening is carried out through the pre-fiber opening roller 18, secondary fiber opening is carried out through the secondary fiber opening roller 19 to form a PTFE filament fine fiber bundle 13, and finally the PTFE filament fine fiber bundle is output through the traction guide roller set 17 at a discharging end 16 and enters a secondary hot stretching device 3;
(3) starting the electric heating element 27 to heat to the temperature required by the hot stretching box 25, then enabling the PTFE filament fiber bundle 13 to enter the hot stretching box 25, and stretching the PTFE filament fiber bundle 13 by the stretching roller group 26;
(4) and obliquely penetrating the PTFE filament fine fiber bundle 13 from an opening of a cavity 30 of a twisting cylinder 31, penetrating out of the twisting hole 32, winding the twisted yarn 14 outside the twisting cylinder 31, then entering a twisting rod 33, winding the twisted yarn 14 on the surface of a guide rod 38, guiding the twisted yarn 14 to be compressed, uniformly winding the twisted yarn 14 on a crimping hole 40 of a yarn bobbin 37, winding the twisted yarn on the yarn bobbin 37, starting a second power mechanism, enabling the yarn bobbin 37 to axially and uniformly reciprocate at a constant speed, and continuously and uniformly winding the twisted yarn 14 on the yarn bobbin 37 to form a bobbin.
It is to be understood that the above description is not intended to limit the present invention, and the present invention is not limited to the above examples, and those skilled in the art should understand that they can make various changes, modifications, additions and substitutions within the spirit and scope of the present invention.
Claims (10)
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| CN116411372A (en) * | 2023-06-07 | 2023-07-11 | 山东森荣新材料股份有限公司 | PTFE filament fiber twisting, heating and shaping device |
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