EP2722299B1 - Pneumatic splicer unit for textile machines - Google Patents

Pneumatic splicer unit for textile machines Download PDF

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Publication number
EP2722299B1
EP2722299B1 EP13188559.2A EP13188559A EP2722299B1 EP 2722299 B1 EP2722299 B1 EP 2722299B1 EP 13188559 A EP13188559 A EP 13188559A EP 2722299 B1 EP2722299 B1 EP 2722299B1
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EP
European Patent Office
Prior art keywords
preparation
tails
tail
cutting
yarn
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Active
Application number
EP13188559.2A
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German (de)
English (en)
French (fr)
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EP2722299A1 (en
Inventor
Roberto Badiali
Mauro Del Pup
Mauro Premi
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Savio Macchine Tessili SpA
Original Assignee
Savio Macchine Tessili SpA
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Application filed by Savio Macchine Tessili SpA filed Critical Savio Macchine Tessili SpA
Publication of EP2722299A1 publication Critical patent/EP2722299A1/en
Application granted granted Critical
Publication of EP2722299B1 publication Critical patent/EP2722299B1/en
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Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B65—CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
    • B65H—HANDLING THIN OR FILAMENTARY MATERIAL, e.g. SHEETS, WEBS, CABLES
    • B65H54/00—Winding, coiling, or depositing filamentary material
    • B65H54/70—Other constructional features of yarn-winding machines
    • B65H54/71—Arrangements for severing filamentary materials
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B65—CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
    • B65H—HANDLING THIN OR FILAMENTARY MATERIAL, e.g. SHEETS, WEBS, CABLES
    • B65H69/00—Methods of, or devices for, interconnecting successive lengths of material; Knot-tying devices ;Control of the correct working of the interconnecting device
    • B65H69/06—Methods of, or devices for, interconnecting successive lengths of material; Knot-tying devices ;Control of the correct working of the interconnecting device by splicing
    • B65H69/061—Methods of, or devices for, interconnecting successive lengths of material; Knot-tying devices ;Control of the correct working of the interconnecting device by splicing using pneumatic means
    • B65H69/063—Preparation of the yarn ends
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B65—CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
    • B65H—HANDLING THIN OR FILAMENTARY MATERIAL, e.g. SHEETS, WEBS, CABLES
    • B65H2701/00—Handled material; Storage means
    • B65H2701/30—Handled filamentary material
    • B65H2701/31—Textiles threads or artificial strands of filaments

Definitions

  • the present invention relates to a pneumatic splicer unit for textile machines, in particular for winding machines.
  • Textile machines such as winding machines are known as being provided with numerous work stations in each of which splicer devices are installed to restore the continuity of the yarn.
  • the continuity of the yarn during unwinding from the feeding bobbin and winding onto the package can be interrupted as desired, for example ordering a cut of the yarn to eliminate a defect, or on account of a spontaneous rupture of said yarn.
  • knotting mechanisms Devices of a mechanical type, known as knotting mechanisms were used as yarn-joiners in the past.
  • splicers are defined as pneumatic account of the fact that the joining of the ends of yarn to connect and join is performed without knotting by means of a special jet of air inside a splicing chamber which said ends to be joined are previously inserted.
  • the known method of the pneumatic splicers provides that the two yarns to be joined, coming in opposite directions from the feeding bobbing and the package, are first captured and manipulated by the packaging head, and then inserted in the splicer where, before the actual joining thereof, they are shortened to size at their respective opposite ends, forming tails.
  • tails are first prepared eliminating the twist and making the fibres parallel, and then retracted so as to have the desired length of reciprocal overlap.
  • the ends of the yarn guided by specific feeders not shown here and belonging to the prior art, are inserted in the splicer so that such free ends are arranged on opposite sides of the splicing chamber and each on the opposite side to its respective feeding bobbin or package.
  • the package yarn end comes to find itself under the splicing chamber and the feeding bobbing yarn end over the splicing chamber.
  • the terminal part of the end is then cut before being captured and transported inside the preparation device where air at a high flow rate and speed removes the twist at the cut end and makes the fibres parallel.
  • Such solution is known by US4505097 A .
  • the yarn tails thus prepared are then retracted by a known tail retraction device, so as to regulate the length inside the splicing chamber, and lastly transported inside the splicing chamber where a jet of fluid produces, by vorticity and flailing, a weaving of the fibres and generates the pneumatic join desired.
  • the splicing chamber may be used as is or may also be closed with a cover.
  • the splicer repositions itself at the starting point releasing the join made to the feeding bobbin head.
  • the pneumatic splicers described above thus contain the splicing chambers which the yarns to be joined are inserted in, the organs for clamping and cutting the tails, the organs for preparing the tails before being joined, organs for closing the covers of the chambers when present, organs for adjusting the length of the tails, organs for adjusting the jets of air in the preparation devices, organs for adjusting the jets of air in the splicing chamber, and release organs of the joined yarn.
  • tails at the moment of their presentation before the preparation devices, are the same length so that once inserted therein and subjected to the strong flow of air they are prepared optimally in a repeatable and even manner.
  • the tail in the absence of such function, after cutting the tail would tend to position itself inadequately for its subsequent preparation, on account of the nature of the yarn, of its liveliness, or the fact that the yarn may contain an elastomer; for example in yarns having an S or Z twist the cut tail may in the first case move in one direction, in the second in the opposite direction and in the case of yarns having an elastomer core inside them added to this effect is the uncontrolled elastic shortening effect.
  • Preparation of the tails is conducted by setting a blowing time of the preparation devices, normally lasting 50 to 500 thousandths of a second; the initial part of such time is used to capture the tail, the remaining part of the time to prepare said tail, for de-twisting and making the fibres parallel. It is clearly important for the time spent capturing the tail to be, not only as short as possible, but also even and homogeneous between the two preparation devices, and to achieve this the tail must always present in the same manner before the preparation device so as to make the capturing time limited, even and homogeneous.
  • the presence of the tail control function in fact prevents the tail, once cut, from positioning itself inadequately in front of the preparation device, with the risk of determining irregular capturing and an imperfect preparation thereof, which then results in an imperfect join or even in a joining error.
  • the pneumatic function is generally provided by the preparation devices, which in a first step are powered at a lower flow rate; this flow of air at a low rate is used to control the tail before cutting, making it assume a definite position so that as soon as cut it presents itself adequately to the preparation device.
  • the flow rate must be low so as not to risk creating random lengthening of the section of yarn between the splicing chamber and the cutting organs, which would cause unevenness of preparation between the tails.
  • the preparation device When the preparation device is then powered at a high flow rate, the tail already present before it is captured and transported therein by the strong flow of air generated; once inserted, the flow of air de-twists the end and makes the fibres parallel.
  • the low pressure pneumatic jet for the control of the tail thus provides a control method of the tails commonly used in that it exploits the preparation organs already present in the splicers, powering them with a low flow rate.
  • the efficiency thereof is however related to the type of yarn to be treated.
  • the additional difficulty is precisely that of achieving a lower flow rate.
  • the solution proposed by the present invention consists of treating the tail as soon as cut for a brief period specifically at the point of the cut to then release it so that it is immediately caught and prepared by the preparation device.
  • the two ends of the yarn are constrained in two points upstream and downstream of the splicing chamber.
  • a scissor has been introduced configured so as not just to cut but also to retain the freshly cut tail so that it is not free to move and thereby not subject to uncontrolled movements caused by the type, liveliness ad twist of the yarn.
  • this further ability of the scissor is independent of the type of tail cut, its gauge, type, liveliness, twist, addition of elastomer and always releases it only at the right moment.
  • the right moment is when the preparation devices are already at full rate and thus the capturing and transport of the tail inside the preparation device is performed with maximum efficiency.
  • the scissor with tail retention function comprises a mobile blade, a fixed blade and a contrast organ.
  • such three elements are arranged in relation to each other so that during cutting they are pressed together by an elastic force, for example exerted on the fixed blade or on the contrast organ.
  • Figure 1 shows the arrangement of the package yarn 1 and the feeding bobbin yarn 2 just introduced into the splicer.
  • the package yarn 1 is manipulated from above and brought downwards beyond the splicing chamber.
  • the drawings also show the splicing chamber 3, the preparation devices 4 and 5, with relative preparation tubes 4' and 5' and the nozzles for the jet of fluid 4" and 5''.
  • the clamp 6 of the package yarn 1 is also shown with the mobile lever 6' and the block 6", and the clamp 7 of the feeding bobbin yarn 2 with the mobile lever 7' and block 7''.
  • the scissor 8 of the feeding bobbing yarn 2 is fitted with the relative mobile blade 8', contrast organ 8"' and fixed blade 8''.
  • Figure 2 shows the arrangement of the yarn 1 and 2 just after the clamping operation by the corresponding clamps 6 and 7.
  • the clamping of the yarns 1 and 2 is performed by closing the mobile levers 6' and 7' against the fixed blocks 6" and 7".
  • Figure 3 shows the arrangement of the clamped yarns when the tail cutting and retention step begins.
  • the package yarn 1 is clamped by the clamp 6 on the upper side and on the lower side is retained between the mobile blade 9' of the scissor 9 which partially straddles the contrast organ 9"' imprisoning the end 1' of the yarn 1.
  • the feeding bobbing yarn 2 is clamped by the clamp 7 on the lower side and on the upper side is retained between the mobile blade 8' of the scissor 8 which partially straddles the contrast organ 8"' imprisoning the end 2' of the yarn 2.
  • FIG 4 shows the subsequent step in which the scissors 8 and 9 have completed their stroke.
  • the mobile blades 9' and 8' overlap the fixed blades 9" and 8" cutting the yarns just after the retention sections 1' and 2'
  • the section of yarn 1' and 2' remain retained respectively between the mobile blades 9' and 8' and the contrast organs 9"' and 8"'.
  • Two tails are thus formed 1'" and 2"', comprised between the retention sections 1' and 2' and the splicing chamber 3.
  • Figure 5 show the arrangement of the yarns as soon as the preparation devices are fed with the high flow rate of fluid.
  • the nozzles 4" and 5" of the preparation devices 4 and 5 emit two jets of high pressure fluid which enter the preparation tubes 4' and 5'.
  • the preparation means 4,5 comprise preparation tubes 4',5' fluidically connected with preparation nozzles 4",5", wherein the nozzles 4",5" emit jets of fluid which enter the preparation tubes 4',5'.
  • the tails 1'" and 2'" thus come to face the entrance of the respective tubes 4' and 5' so as to position themselves adequately for their subsequent capture by the tube 4' and 5' at the moment of release of the point 1' and 2' retained between the blades 9' and 8' and the respective contrast organs 9"' and 8'''.
  • a portion of yarn comprised between the tail 1"',2"' and the splicing chamber 3 crosses the preparation means 4,5 in order to be directly influenced by the jets of the preparation nozzles 4",5".
  • the portion of yarn crossing the preparation means 4,5 is comprised between the preparation nozzle 4",5" and the preparation tubes 4',5', so as to being directly influenced by the flow of the preparation nozzle 4",5" and forced to enter into said preparation tube 4',5' under the thrust of said flow, before releasing the tails 1"',2"'.
  • the preparation nozzles 4",5" are aligned with an inlet port 4"',5'" of the preparation tubes 4',5', in order to directly send the jets of fluid into the preparation tubes 4',5' and directly force the yarn to enter said preparation tubes 4',5'.
  • the preparation tube 4',5' has a prevalent transversal direction Y-Y which is parallel to the main direction of the jets generated by said preparation nozzles 4",5".
  • Figure 6 shows the arrangement of the yarns 1'" and 2"' just after their release by the mobile blades 9' and 8' which move backwards releasing the points previously retained 1' and 2'.
  • tails 1'" and 2'" are shown by a continuous line, letter a, an instant before their release, and by a dotted line, letter b, the same tails 1'" and 2"' are shown inserted in the preparation tubes 4' and 5' subject to the flow of fluid used for their preparation.
  • Figure 7 show the tails 1'" and 2'" with respective ends 1"" and 2"” prepared by the preparation devices 4 and 5 without twist and with the fibres parallel, once withdrawn towards the splicing chamber 3 by the desired length.
  • Two mobile levers 10 and 11 are used to distend the yarns 1 and 2 deviating their path in a known manner, so that the respective tails 1"' and 2"' return by a predetermined length towards the splicing chamber 3.
  • Figure 8 shows the tails 1'" and 2'" after their encompassing in the join 12 of the yarns 1 and 2 which is achieved by injecting pressurized fluid into the splicing chamber 3, using the known method.
  • FIG 9 shows the last step, in which the mobile levers 6' and 7' free the two sections of yarn 1 and 2 now joined by the join 12 from the blocks 6" and 7" of the clamps 6 and 7.
  • the splicer is once again in the rest position and the joined yarn can be extracted to resume the winding operation.
  • the pneumatic splicer according to the present invention represents an alternative solution to the known splicers relative to the problem of controlling the freshly cut tails as the type of yarn varies.

Landscapes

  • Engineering & Computer Science (AREA)
  • Textile Engineering (AREA)
  • Spinning Or Twisting Of Yarns (AREA)
  • Yarns And Mechanical Finishing Of Yarns Or Ropes (AREA)
  • Replacement Of Web Rolls (AREA)
EP13188559.2A 2012-10-16 2013-10-14 Pneumatic splicer unit for textile machines Active EP2722299B1 (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
IT001748A ITMI20121748A1 (it) 2012-10-16 2012-10-16 Gruppo giuntafili pneumatico per macchine tessili

Publications (2)

Publication Number Publication Date
EP2722299A1 EP2722299A1 (en) 2014-04-23
EP2722299B1 true EP2722299B1 (en) 2017-07-05

Family

ID=47226279

Family Applications (1)

Application Number Title Priority Date Filing Date
EP13188559.2A Active EP2722299B1 (en) 2012-10-16 2013-10-14 Pneumatic splicer unit for textile machines

Country Status (4)

Country Link
EP (1) EP2722299B1 (zh)
CN (2) CN203602819U (zh)
IN (1) IN2013MU03232A (zh)
IT (1) ITMI20121748A1 (zh)

Families Citing this family (10)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
ITMI20121748A1 (it) * 2012-10-16 2014-04-17 Savio Macchine Tessili Spa Gruppo giuntafili pneumatico per macchine tessili
JP2016155648A (ja) * 2015-02-24 2016-09-01 村田機械株式会社 糸継装置及び糸巻取装置
CN105951224A (zh) * 2016-04-22 2016-09-21 东华大学 一种配合胶粘法的接头剪切装置及剪切方法
CN108341083A (zh) * 2018-01-26 2018-07-31 巨石集团有限公司 一种空气结式的纱线打结方法
CN109295573A (zh) * 2018-11-28 2019-02-01 宜宾海丝特纤维有限责任公司 一种粘胶长丝单丝加捻生产过程中控制无捻丝段的工艺
CN110577114B (zh) * 2019-10-10 2024-03-15 上海枭腾纺织科技有限公司 全自动智能打结器
CN112111826A (zh) * 2020-08-27 2020-12-22 巨石集团有限公司 一种纱线打结器及纱线打结方法
CN113005578B (zh) * 2021-02-20 2022-04-22 高燕妮 一种制备对位芳纶纱线的多线层梳理装置
CN116065273B (zh) * 2023-03-31 2023-05-30 江苏美丽华电器有限公司 一种假捻变形机的卷绕张力调节装置
CN116676693A (zh) * 2023-06-14 2023-09-01 常州市宏发纵横新材料科技股份有限公司 一种纤维空捻装置及拼接方法

Family Cites Families (10)

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JPS55106968A (en) * 1979-02-09 1980-08-16 Murata Mach Ltd Pneumatic type thread connector
JPS59112038A (ja) * 1982-12-16 1984-06-28 Murata Mach Ltd 紡績糸の糸継方法
JPH0791707B2 (ja) * 1987-07-21 1995-10-04 村田機械株式会社 紡績装置における糸継方法および装置
DE4008640A1 (de) * 1990-03-17 1991-09-19 Stahlecker Gmbh Wilhelm Spleissvorrichtung zum verbinden von faeden
IT1299006B1 (it) * 1998-04-02 2000-02-07 Mesdan Spa Dispositivo per la preparazione dell'estremita' di filo alla giunzione con un apparecchio per la giunzione pneumatica senza nodo di fili e
IT1316370B1 (it) * 2000-02-15 2003-04-10 Mesdan Spa Dispositivo e procedimento per la giunzione di fili tessili mediantearia compressa e liquido
DE10202781A1 (de) * 2002-01-25 2003-07-31 Schlafhorst & Co W Vorrichtung zum pneumatischen Verbinden von Garnen
DE60216070T2 (de) * 2002-07-24 2007-06-28 Murata Kikai K.K. Fadenspleisser
ITMI20061977A1 (it) * 2006-10-16 2008-04-17 Mesdan Spa Metodo per la giunzione pneumatica ottimizzata di fili o filati e relativo dispositivo
ITMI20121748A1 (it) * 2012-10-16 2014-04-17 Savio Macchine Tessili Spa Gruppo giuntafili pneumatico per macchine tessili

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Also Published As

Publication number Publication date
IN2013MU03232A (zh) 2015-07-10
ITMI20121748A1 (it) 2014-04-17
EP2722299A1 (en) 2014-04-23
CN203602819U (zh) 2014-05-21
CN103726148A (zh) 2014-04-16
CN103726148B (zh) 2018-01-12

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