CN102517665A - Complete device for manufacturing polytetrafluoroethylene (PTFE) short fiber in acupuncture comb-cutting method and method thereof - Google Patents
Complete device for manufacturing polytetrafluoroethylene (PTFE) short fiber in acupuncture comb-cutting method and method thereof Download PDFInfo
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Abstract
The invention relates to a device for manufacturing a short fiber, in particular to a complete device for manufacturing a polytetrafluoroethylene (PTFE) short fiber in an acupuncture comb-cutting method and a method thereof. The complete device comprises an oriented film unwinding mechanism, a pair puncture needle roller for puncturing an oriented film, a comb-cutting roller combing and cutting the punctured oriented film into filaments, a buncher bunching the filaments, a traversing gear and a winding mechanism which are all arranged in sequence, wherein the winding mechanism is used for winding a filament bundle. Compared with a film breaking processing process widely adopted at present, the complete device for manufacturing the PTFE short fiber in the acupuncture comb-cutting method and the method thereof have the advantages that the process is simple, reasonable and reliable, operation is convenient, energy consumption is little, efficiency is high, and the device and main parts are low in manufacturing cost, little in investment and low in maintenance cost. The PTFE short fiber with thinner fineness can be produced, the average fineness can reach 2.5dtex at minimum, and production varieties are expanded.
Description
Technical field
The present invention relates to a kind of equipment that staple fibre is used of making, relate in particular to a kind of acupuncture comb and cut manufactured PTFE staple fibre with complete set of equipments and method thereof.
Background technology
That polytetrafluoroethylene (PTFE) has is high temperature resistant, acid-alkali-corrosive-resisting, hydrolysis or the like unrivaled advantage of other plastics; Be made into staple fibre and can be made into high temperature resistance filtration material; The corrosion-resistant filtrate of chemical and medicine industry industry, PTFE nonwoven fabric or the like is widely used more and more.
The method of making the PTFE staple fibre at present has two types, and the first kind is a melt spinning method, because the mobile extreme difference under the PTFE molten condition is made staple fibre so can not adopt common fusion to put a method.But adopt a kind of special method, promptly through viscose glue as carrier, the emulsion of viscose glue fusion emulsion and PTFE dispersion is mixed into one; Extruding spinning then, again through high temperature with the thermal decomposition of viscose glue composition, keep the PTFE composition and become the PTFE fiber; Because being decomposed by elevated temperature heat, viscose glue always have some small ashes to remain in the PTFE fiber; And be coke yellow, so this kind method can only be produced auburn fiber.Big, high, the complex process of cost of this manufacturing approach investment, and the staple strength of producing low, be brown, staple fibre is used and is restricted.
Second type of method of making the PTFE staple fibre is that film splits method; Earlier process length (vertically) direction to the PTFE dispersion resin exactly and be Fibrotic oriented film with certain intensity; Method through machinery divides thin-film width (laterally) direction then; Vertically be linear fibreization, this method can produce white or other versicolor fibers.Second type manufacturing approach investment is little, cost is low, and the PTFE staple fibre intensity of producing is high, can produce multiple color as required, so be widely used.
What film split most critical in the manufactured PTFE staple fibre is the method that film splits; This method can have a variety of, and what be employed at present has 2 kinds, and first kind is on oriented film, to carry out embossed; Promptly carry out embossed with the concave-convex that is similar to the zigzag shape linearly and on width (laterally) direction of film along length (vertically) direction of film; Break the strand of width subsequently and to cut apart, obtain fiber filament, obtain staple fibre through cut-out again.Second method is that oriented film is directly cut into some crins linearly and at horizontal direction at length direction; Carrying out the bunchy heating subsequently; Again through repeatedly push, stretch, heat, operation such as stretching makes intrafascicular crin drawing-down, and becomes fiber, forms staple fibre through cutting off.
Two kinds of methods that the film of using aborning at present splits manufactured PTFE staple fibre all have this different separately shortcoming.First kind of fibre fineness that adopts the embossed manufacturing approach to make is bigger, and average fineness is more than 4.5dtex.The roll extrusion rotor (as shown in Figure 1) of realizing embossed is made the requirement height, difficulty is big.Because the fineness of fiber is decided by the size of knife edge spacing on the roll extrusion cutter, have only the very little knife mark of spacing could make the thinner fiber of fineness, yet knife mark is more little, the difficulty of making processing is just big more, and required precision is also just high more, and manufacturing cost is quite high.So making thinner fiber just is restricted.Require embossing hobboing cutter knife mark peak mouth to keep sharp in the manufacture process, have passivation will influence production slightly, so the roll extrusion cutter needs often to change reconditioning in the production process, maintenance cost is very high.Second method is cut into boundling twisting again behind the strip with divided thin film; Subsequently through extrusion stretching, heat drawing, extrusion stretching, heat drawing more again; Iterative process so repeatedly; Pull into fine fibre to the crin after cutting apart, the fibre fineness of this method mainly is that the stretching through repeatedly obtains, and operation is various, energy consumption is huge, efficient is low, cost is high.
Summary of the invention
The technical problem that the present invention will solve is: in order to raise the efficiency, reduce cost, produce thinner PTFE staple fibre, the present invention provides a kind of acupuncture comb to cut manufactured PTFE staple fibre with complete set of equipments and method thereof.
The technical solution adopted for the present invention to solve the technical problems is: a kind of acupuncture comb cuts manufactured PTFE staple fibre and use complete set of equipments, comprises the oriented film unreeling structure that sets gradually, oriented film is punctured and is arranged on a pair of puncture porcupine roller of oriented film upper and lower, oriented film after will puncturing comb the comb that is slit into long filament and cut roller, the buncher, traversing gear with the long filament boundling and the rolling-up mechanism that endless tow is carried out rolling.
For the transmission that guarantees oriented film is carried out smoothly, between described unreeling structure and the puncture porcupine roller, puncture porcupine roller and comb cut between the roller, comb cuts and also is respectively arranged with first pair of rubber grips roller, second pair of rubber grips roller and the 3rd pair of rubber grips roller between roller and the buncher.
Particularly, described puncture porcupine roller has roll body, and the external peripheral surface of roll body has compact arranged puncture draw point.
For the effect that guarantees to puncture, described a pair of puncture porcupine roller meshes up and down, and the diameter of puncture draw point is 0.3～0.4mm, and pin length is 14～16mm, and the needle point area is smaller or equal to 0.001mm
2, the array pitch of puncture draw point is 3～5mm, density is 25～33/cm
2, the degree of depth of inserting oriented film is 0.3～1mm.
Further, particularly, described comb cuts roller to have comb and cuts roller body, and the external peripheral surface that comb cuts roller body is coated with card clothing.
Cut the mitigation that roller comb cuts power in order to guarantee to comb; Avoid damage or interrupt long filament; Described card clothing comprises that elastic rubber layer cuts draw point as pin base and the comb that closely is arranged on the pin base, and the card clothing diameter that said comb cuts roller is 300mm, and the pin type that comb cuts draw point is a flat; Pin is long to be 4.5mm, and the density that comb cuts the draw point arrangement is 100/cm
2
The method that a kind of acupuncture comb cuts manufactured PTFE staple fibre has following processing step:
Step 1 with PTFE mixing raw materials, mold pressing, pushing, calendering film forming, is processed molecular structure through sintering, heating, stretching again and is the Fibrotic oriented film of chain at length direction, and oriented film thickness is 20um～40um;
Step 2, oriented film is introduced between a pair of puncture porcupine roller through transmission, and oriented film is punctured, and makes and forms the pin hole of arranging in length and breadth on the oriented film, and the linear velocity of the needle point of puncture porcupine roller is consistent with the linear velocity of oriented film operation;
Step 3, the oriented film after being punctured transfer to comb and cut roller and comb and cut, and make oriented film on width, divide separation, are the long filament of linear filament state in the longitudinal direction continuously, comb 2～3 times greater than the oriented film speed of service of the travel line speed of cutting roller;
Step 4 transfers to buncher with the long filament in the step 3 and carries out boundling;
Step 5, the long filament behind the boundling are passed through to obtain the PTFE staple fibre that the PTFE staple fibre perhaps curls through acquisition after curling, typing, cut-out, the shredding successively after cut-out, the shredding successively;
Step 6 is to the check of the PTFE staple fibre in the step 5, packing.
For the transmission that guarantees oriented film is carried out smoothly, oriented film is introduced between a pair of puncture porcupine roller through first pair of rubber grips roller transmission in the described step 2; The oriented film that is punctured in the described step 3 transfers to comb through second pair of rubber grips roller and cuts roller; Long filament transfers to buncher through the 3rd pair of rubber grips roller in the described step 4.
In order to guarantee that every pair of oriented film or long filament between the rubber grips roller has certain tension force; The linear velocity of described first pair of rubber grips roller operation is less than the linear velocity of second pair of rubber grips roller operation; The linear velocity of second pair of rubber grips roller operation is less than the linear velocity of the 3rd pair of rubber grips roller operation, and the linear velocity between the three respectively differs 10～15%.
The invention has the beneficial effects as follows that acupuncture comb of the present invention cuts complete set of equipments and the method thereof that manufactured PTFE staple fibre is used, compare the split film process technology that extensively adopts at present; Technology advantages of simple, reliable, easy to operate; Less energy consumption, efficient are high, and equipment and critical piece make that price is low, small investment, maintenance are low, and the present invention can make the thinner PTFE staple fibre of fineness; The I of average fineness reaches 2.5dtex, has expanded the production kind.
Description of drawings
Below in conjunction with accompanying drawing and embodiment the present invention is further specified.
Fig. 1 is the structural representation of prior art roll extrusion rotor.
Fig. 2 is that acupuncture comb of the present invention cuts the structural representation of manufactured PTFE staple fibre with complete set of equipments.
Fig. 3 is the structural representation of puncture porcupine roller among the present invention.
Fig. 4 is the structural representation that comb cuts roller among the present invention.
Among the figure 1, unreeling structure, 2, first pairs of rubber grips rollers, 3, the puncture porcupine roller, 3-1, circle roller; 3-2, puncture draw point, 4, second pairs of rubber grips rollers, 5, comb cuts roller; 5-1, comb cut roller body, 5-2, pin base, and 5-3, comb cut draw point, 6, the 3rd pairs of rubber grips rollers; 7, buncher, 8, traversing gear, 9, coiler.
The specific embodiment
Combine accompanying drawing that the present invention is done further detailed explanation now.These accompanying drawings are the sketch map of simplification, basic structure of the present invention only is described in a schematic way, so it only show the formation relevant with the present invention.
Embodiment 1:
Like Fig. 2,3, shown in 4; Acupuncture comb of the present invention cuts manufactured PTFE staple fibre with complete set of equipments and method thereof; Comprise the unreeling structure that is wound with oriented film 1 that sets gradually; The puncture porcupine roller 3 of the first pair of rubber grips roller 2, a pair of engagement up and down that oriented film is punctured, the second pair of rubber grips roller 4, the oriented film after will puncture are combed that the comb that is slit into long filament cuts roller 5, the 3rd pair of rubber grips roller 6, the buncher 7 with the long filament boundling, traversing gear 8 and endless tow are carried out the rolling-up mechanism 9 of rolling; Puncture porcupine roller 3 has roll body 3-1, and the external peripheral surface of roll body 3-1 has compact arranged puncture draw point 3-2, and puncture draw point 3-2 diameter is 0.3mm; Pin is long to be 15mm, and the needle point area is 0.0005mm
2, the array pitch of puncture draw point 3-2 is 4mm, density is 30/cm
2, the degree of depth of inserting oriented film is 0.5mm.Comb cuts roller 5 to have comb and cuts roller body 5-1; The external peripheral surface that comb cuts roller body 5-1 is coated with card clothing; Card clothing comprises that elastic rubber layer cuts draw point 5-3 as pin base 5-2 and the comb that closely is arranged on the pin base 5-2, and the card clothing diameter that comb cuts roller 5 is 300mm, and the pin type that comb cuts draw point 5-3 is a flat; Pin is long to be 4.5mm, and the density that comb cuts draw point 5-3 arrangement is 100/cm
2
The manufacturing approach step is following during use:
Step 1 with PTFE mixing raw materials, mold pressing, pushing, calendering film forming, is processed molecular structure through sintering, heating, stretching again and is the Fibrotic oriented film of chain at length direction, and oriented film thickness is 30um;
Step 2, oriented film is introduced between a pair of puncture porcupine roller 3 through 2 transmission of first pair of rubber grips roller, and oriented film is punctured, and makes and forms the pin hole of arranging in length and breadth on the oriented film, and the linear velocity of the needle point of puncture porcupine roller 3 is consistent with the linear velocity of oriented film operation;
Step 3; The oriented film that is punctured is directly introduced second pair of rubber grips roller 4; Transfer to comb and cut roller 5; Make the oriented film that is punctured on width, divide separation, be the long filament of linear filament state in the longitudinal direction continuously, combing the travel line speed of cutting roller 5 should be greater than 2～3 times of the oriented film speed of service;
Step 4 transfers to buncher 7 with the long filament in the step 3 through the 3rd pair of rubber grips roller 6 and carries out boundling;
Step 5, the long filament behind the boundling transfer to coiler 9 through traversing gear 8 and carry out the rolling endless tow;
Step 6, long filament through obtaining the PTFE staple fibre after cut-out, the shredding, are checked then, are packed successively.
Wherein: the linear velocity of first pair of rubber grips roller 2 operation is less than the linear velocity of second pair of rubber grips roller, 4 operations; The linear velocity of second pair of rubber grips roller 4 operation is less than the linear velocity of the 3rd pair of rubber grips roller 6 operations, and the linear velocity between the three respectively differs 10～15%.
Embodiment 2:
Like Fig. 2,3, shown in 4; Acupuncture comb of the present invention cuts manufactured PTFE staple fibre with complete set of equipments and method thereof; Comprise the unreeling structure that is wound with oriented film 1 that sets gradually; The first pair of rubber grips roller 2, oriented film punctured and be arranged on the comb that puncture porcupine roller 3, the second pair of rubber grips roller 4 of a pair of engagement up and down of oriented film upper and lower, oriented film comb after will puncture be slit into long filament cut roller 5, the 3rd pair of rubber grips roller 6, buncher 7, the traversing gear 8 with the long filament boundling and the rolling-up mechanism 9 that endless tow is carried out rolling, the porcupine roller 3 that punctures has roll body 3-1, and the external peripheral surface of roll body 3-1 has compact arranged puncture draw point 3-2; Puncture draw point 3-2 diameter is 0.4mm, and pin is long to be 16mm, and the needle point area is 0.001mm
2, the array pitch of puncture draw point 3-2 is 4mm, density is 26/cm
2, the degree of depth of inserting oriented film is 0.6mm.Comb cuts roller 5 to have comb and cuts roller body 5-1; The external peripheral surface that comb cuts roller body 5-1 is coated with card clothing; Card clothing comprises that elastic rubber layer cuts draw point 5-3 as pin base 5-2 and the comb that closely is arranged on the pin base 5-2, and the card clothing diameter that comb cuts roller 5 is 300mm, and the pin type that comb cuts draw point 5-3 is a flat; Pin is long to be 4.5mm, and the density that comb cuts draw point 5-3 arrangement is 100/cm
2
The manufacturing approach step is following during use:
Step 1 with PTFE mixing raw materials, mold pressing, pushing, calendering film forming, is processed molecular structure through sintering, heating, stretching again and is the Fibrotic oriented film of chain at length direction, and oriented film thickness is 35um;
Step 2, oriented film is introduced between a pair of puncture porcupine roller 3 through 2 transmission of first pair of rubber grips roller, and oriented film is punctured, and makes and forms the pin hole of arranging in length and breadth on the oriented film, and the linear velocity of the needle point of puncture porcupine roller 3 is consistent with the linear velocity of oriented film operation;
Step 3; The oriented film that is punctured is directly introduced second pair of rubber grips roller 4; Transfer to comb and cut roller 5; Make the oriented film that is punctured on width, divide separation, be the long filament of linear filament state in the longitudinal direction continuously, combing the travel line speed of cutting roller 5 should be greater than 2～3 times of the oriented film speed of service;
Step 4 transfers to buncher 7 with the long filament in the step 3 through the 3rd pair of rubber grips roller 6 and carries out boundling;
Step 5, the long filament behind the boundling transfer to coiler 9 through traversing gear 8 and carry out the rolling endless tow;
Step 6, long filament be the PTFE staple fibre through obtaining after curling, typing, cut-out, the shredding to curl successively, checks then, packs.
Wherein: in order to guarantee to puncture and comb carrying out smoothly of cutting; Film between two nip roilers need have certain force of strain; So the linear velocity of first pair of rubber grips roller 2 operation is less than the linear velocity of second pair of rubber grips roller, 4 operations; The linear velocity of second pair of rubber grips roller 4 operation is less than the linear velocity of the 3rd pair of rubber grips roller 6 operations, and the linear velocity between the three respectively differs 10～15%.
The staple fibre of production different fineness if desired can change the density of puncture draw point 3-2; Comb cuts the density that the comb of roller 5 cuts draw point 5-3, and parameters such as the thickness of oriented film are like the fiber that will wait until that fineness is thinner; It is big that pin density is wanted; Make the thicker fiber of fineness, pin density is little, can change according to the needs of production kind.The speed that comb cuts roller 5 will match with pin density, and pin density is high, rotating speed wants high, and pin density is low, rotating speed is low.
Adopt the needle point of puncture porcupine roller 3 that oriented film is punctured; Stung the micro hole that certain queueing discipline is arranged on the oriented film; Be most critical in the film cracking method of the present invention, effective technology, it becomes fine fineness and uniformity can access sufficient assurance for the road, back.Effectively insert, evenly cut apart etc. the realization of comb cutting mill reason for the stable guiding of the comb technology of cutting in road, back and played crucial effect, the strike that has reduced oriented film when comb cuts simultaneously damages, has reduced the generation of superfine fibre and short flannel.
Comb cuts roller 5 and adopts the metallic elastic card clothing; Select suitable pin type and pin tooth density for use; Be equipped with rational speed, comb and cut technologies such as length, pin tooth insertion depth; Can be effectively the oriented film after the puncture be separated and reaches the filament state at width, process the uniform long fiber bundle of fineness, after cut-out, can be made into the staple fibre of different length requirement.
With above-mentioned foundation desirable embodiment of the present invention is enlightenment, and through above-mentioned description, the related work personnel can carry out various change and modification fully in the scope that does not depart from this invention technological thought.The technical scope of this invention is not limited to the content on the specification, must confirm its technical scope according to the claim scope.
Claims (10)
1. acupuncture comb cuts manufactured PTFE staple fibre and use complete set of equipments, it is characterized in that: a pair of puncture porcupine roller (3) that comprises the oriented film unreeling structure (1) that sets gradually, oriented film is punctured, the oriented film after will puncturing are combed that the comb that is slit into long filament cuts roller (5), the buncher (7) with the long filament boundling, traversing gear (8) and endless tow are carried out the rolling-up mechanism (9) of rolling.
2. acupuncture as claimed in claim 1 comb cuts manufactured PTFE staple fibre and use complete set of equipments, it is characterized in that: between described unreeling structure (1) and the puncture porcupine roller (3), puncture porcupine roller (3) and comb cut between the roller (5), comb to cut and also be respectively arranged with first pair of rubber grips roller (2), second pair of rubber grips roller (4) and the 3rd pair of rubber grips roller (6) between roller (5) and the buncher (7).
3. acupuncture comb as claimed in claim 1 cuts manufactured PTFE staple fibre and uses complete set of equipments, and it is characterized in that: described puncture porcupine roller (3) has roll body (3-1), and the external peripheral surface of roll body (3-1) has compact arranged puncture draw point (3-2).
4. acupuncture comb as claimed in claim 3 cuts manufactured PTFE staple fibre and uses complete set of equipments; It is characterized in that: described a pair of puncture porcupine roller (3) meshes up and down; The diameter of puncture draw point (3-2) is 0.3～0.4mm, and pin length is 14～16mm, and the needle point area is smaller or equal to 0.001mm
2, the array pitch of puncture draw point (3-2) is 3～5mm, density is 25～33/cm
2, the degree of depth of inserting oriented film is 0.3～1mm.
5. acupuncture as claimed in claim 1 comb cuts manufactured PTFE staple fibre and use complete set of equipments, it is characterized in that: described comb cuts roller (5) to have comb and cuts roller body (5-1), combs the external peripheral surface that cuts roller body (5-1) and is coated with card clothing.
6. acupuncture as claimed in claim 5 comb cuts manufactured PTFE staple fibre and uses complete set of equipments, it is characterized in that: described card clothing comprises that elastic rubber layer cuts draw point (5-3) as pin base (5-2) and the comb that closely is arranged on the pin base (5-2).
7. acupuncture comb as claimed in claim 6 cuts manufactured PTFE staple fibre and uses complete set of equipments; It is characterized in that: the card clothing diameter that said comb cuts roller (5) is 300mm; The pin type that comb cuts draw point (5-3) is a flat, and pin is long to be 4.5mm, and the density that comb cuts the draw point arrangement is 100/cm
2
8. each described acupuncture comb of use such as claim 1 to 7 cuts manufactured PTFE staple fibre and makes the method for PTFE staple fibre with complete set of equipments, it is characterized in that having following processing step:
Step 1 with PTFE mixing raw materials, mold pressing, pushing, calendering film forming, is processed molecular structure through sintering, heating, stretching again and is the Fibrotic oriented film of chain at length direction, and oriented film thickness is 20um～40um;
Step 2, oriented film is introduced between a pair of puncture porcupine roller (3) through transmission, and oriented film is punctured, and makes to form the pin hole of arranging in length and breadth on the oriented film, and the linear velocity of the needle point of puncture porcupine roller (3) is consistent with the linear velocity of oriented film operation;
Step 3; Oriented film after being punctured transfers to comb and cuts roller (5) and comb and cut; Make oriented film on width, divide separation, be the long filament of linear filament state in the longitudinal direction continuously, the travel line speed that comb cuts roller (5) is greater than 2～3 times of the oriented film speed of service;
Step 4 transfers to buncher (7) with the long filament in the step 3 and carries out boundling;
Step 5, the long filament behind the boundling are passed through to obtain the PTFE staple fibre that the PTFE staple fibre perhaps curls through acquisition after curling, typing, cut-out, the shredding successively after cut-out, the shredding successively;
Step 6 is to the check of the PTFE staple fibre in the step 5, packing.
9. the method for manufacturing PTFE staple fibre as claimed in claim 8 is characterized in that: oriented film is introduced between a pair of puncture porcupine roller (3) through first pair of rubber grips roller (2) transmission in the described step 2; The oriented film that is punctured in the described step 3 transfers to comb through second pair of rubber grips roller (4) and cuts roller (5); Long filament transfers to buncher (7) through the 3rd pair of rubber grips roller (6) in the described step 4.
10. manufacturing PTFE staple fibre method as claimed in claim 9; It is characterized in that: the linear velocity of described first pair of rubber grips roller (2) operation is less than the linear velocity of second pair of rubber grips roller (4) operation; The linear velocity of second pair of rubber grips roller (4) operation is less than the linear velocity of the 3rd pair of rubber grips roller (6) operation, and the linear velocity between the three respectively differs 10～15%.
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| CN104947212A (en) * | 2015-06-25 | 2015-09-30 | 常州万容新材料科技有限公司 | Complete equipment and method for manufacturing PTFE short fibers through needle-puncturing combing and cutting method |
| CN105133064A (en) * | 2015-08-31 | 2015-12-09 | 江苏泓彦塑料制品有限公司 | Preparation method for PTFE short fiber |
| CN106149076A (en) * | 2015-04-27 | 2016-11-23 | 陈路 | A kind of for manufacture PTFE fiber to split film secondary |
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Address after: 213004 No. 355 labour East Road, Tianning District, Jiangsu, Changzhou Patentee after: CHANGZHOU HUAFU ENVIRONMENT TECHNOLOGY CO., LTD. Address before: 213175, Jiangsu City, Wujin province Changzhou District Huang Zhen Tan Village, Changzhou City East Xinhua Fu plastic material Co., Ltd. Patentee before: Changzhou Dongxin Huafu Fluoroplastic Material Co., Ltd. |