EP0159395A1 - Procédé d'étirage d'une bande de fibres pour machines de filature - Google Patents

Procédé d'étirage d'une bande de fibres pour machines de filature Download PDF

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Publication number
EP0159395A1
EP0159395A1 EP84112016A EP84112016A EP0159395A1 EP 0159395 A1 EP0159395 A1 EP 0159395A1 EP 84112016 A EP84112016 A EP 84112016A EP 84112016 A EP84112016 A EP 84112016A EP 0159395 A1 EP0159395 A1 EP 0159395A1
Authority
EP
European Patent Office
Prior art keywords
sliver
cylinders
drafting
cylinder
roving
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.)
Withdrawn
Application number
EP84112016A
Other languages
German (de)
English (en)
Inventor
Gerhard Mandl
Giancarlo Mondini
Viktor Pietrini
Kurt Weber
Rudolf Wildbolz
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.)
Maschinenfabrik Rieter AG
Original Assignee
Maschinenfabrik Rieter AG
Priority date (The priority date 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 date listed.)
Filing date
Publication date
Application filed by Maschinenfabrik Rieter AG filed Critical Maschinenfabrik Rieter AG
Priority to EP84112016A priority Critical patent/EP0159395A1/fr
Publication of EP0159395A1 publication Critical patent/EP0159395A1/fr
Withdrawn legal-status Critical Current

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    • D—TEXTILES; PAPER
    • D01—NATURAL OR MAN-MADE THREADS OR FIBRES; SPINNING
    • D01H—SPINNING OR TWISTING
    • D01H5/00—Drafting machines or arrangements ; Threading of roving into drafting machine
    • D01H5/18—Drafting machines or arrangements without fallers or like pinned bars
    • D01H5/46—Loading arrangements
    • D01H5/50—Loading arrangements using springs
    • D01H5/505—Loading arrangements using springs for top roller arms
    • D—TEXTILES; PAPER
    • D01—NATURAL OR MAN-MADE THREADS OR FIBRES; SPINNING
    • D01H—SPINNING OR TWISTING
    • D01H5/00—Drafting machines or arrangements ; Threading of roving into drafting machine
    • D01H5/18—Drafting machines or arrangements without fallers or like pinned bars
    • D01H5/22—Drafting machines or arrangements without fallers or like pinned bars in which fibres are controlled by rollers only
    • D—TEXTILES; PAPER
    • D01—NATURAL OR MAN-MADE THREADS OR FIBRES; SPINNING
    • D01H—SPINNING OR TWISTING
    • D01H5/00—Drafting machines or arrangements ; Threading of roving into drafting machine
    • D01H5/18—Drafting machines or arrangements without fallers or like pinned bars
    • D01H5/44—Adjusting drafting elements, e.g. altering ratch

Definitions

  • the invention relates to a method for spinning machines, in particular for draw frames, for processing a sliver with a stacking area of short to long staple fibers.
  • DE-PS 1250315 shows and describes a drafting system with, viewed in the running direction of the sliver, an input cylinder pair, a middle cylinder pair and an output cylinder pair, each consisting of a lower cylinder and an associated pressure cylinder.
  • the input and the middle pair of cylinders together form a leading, while the middle and the output pair of cylinders form a main drawing zone.
  • the input cylinder pair is in the direction of the fiber seen bandes, linearly movable back and forth to change the length of the pre-stretching zone.
  • Both cylinders can be moved independently of each other.
  • the middle and the output lower cylinder are rigid, while the middle and the output pressure cylinder are arranged linearly displaceable in the same way as the input pressure cylinder.
  • All three printing cylinders can be moved vertically with respect to a base plate receiving the bearing blocks of the lower cylinders, so that when the printing cylinders are linearly displaced, they can move around the fixed or fixed lower cylinders in combination with the vertical mobility. This makes it possible to change the length of the main stretching zone and to adapt it to a certain extent to the stack length.
  • the output lower cylinder has a larger diameter than all other cylinders.
  • the bearing blocks of the printing cylinders are arranged so as to be linearly displaceable on the bearing blocks of the lower cylinders.
  • the pressure on the pressure cylinder is exerted by spring-loaded pressure pistons, which are attached to a swivel and lockable bracket.
  • CH-PS 426 570 shows and describes a drafting system with a pre-stretching and a main stretching zone, in which the pressure cylinder is about the axis of the lower cylinder are pivotally arranged around to lengthen or shorten the loop of the sliver on the lower cylinders.
  • the mutual distances of the roller groups can be changed.
  • the accuracy of the assembly is also decisive for the service life of a bearing, e.g. in relation to the parallelism of the pressure and sub-cylinders to one another and in relation to the exact alignment of the cylinder shafts to the elements driving the shafts.
  • Another disadvantage is the large diameter of the output lower cylinder, since this increases the distance between the clamping lines of the main stretching zone.
  • the drafting system has the disadvantage that in order to e.g. To be able to lead into a can, an additional deflection of the belt after the drafting system is required, which is necessary for the belt at belt speeds of 13.3 m / sec. and more results in an additional, undesirable centrifugal load and thereby creates a procedural disadvantage.
  • the object of the invention is to remedy these disadvantages.
  • the invention as characterized in the claims, solves the problem in such a way that with increasing sliver speed due to thinning of the sliver in the stretching process, the direction of movement per stretching stage before and / or in the stretching zone is deflected such that the sliver running out relative to the incoming sliver gradually in the stretching process undergoes a deflection of essentially 90 angular degrees and, for each positive deflection, an acceleration value (r ⁇ ⁇ 2 ) of does not exceed.
  • An advantageous embodiment of the drafting arrangement consists in the arrangement of the pressure cylinders on the pivotable arm. This means that even wide fiber slivers can be easily and safely inserted into the drafting system.
  • Another advantageous embodiment consists in that the displaceable printing cylinders can be adjusted by means of rastering to adapt to the stack length, and the extent of the displacement can be measured by means of a scale, so that they can be displaced quickly and precisely, which, despite the displaceability of the printing cylinders, ensures precise parallel guidance of the Pressure cylinder to the lower cylinders guaranteed.
  • the displacement of the second pressure cylinder delimiting the main stretching zone results in an arc around the axis of rotation of the corresponding lower cylinder Possibility of ensuring a tangential entry of the sliver into this pair of cylinders, regardless of whether a push rod with positive or negative deflection of the sliver is used.
  • the small diameter of the second lower cylinder delimiting the main drawing zone has the advantage that, despite the also advantageous large diameter of the previous lower cylinder, an optimally short clamping distance can be achieved.
  • a drafting system 1 comprises a machine frame 2, on which the arm parts 4 forming a double arm are pivotably mounted by means of a hinge pin 3.
  • the arm parts 4 each comprise an arch part 5 and an arch part 6 and an end part 7.
  • a notch 8 is provided on the end part 7 for receiving a fixing bolt 9 each.
  • the fixing bolt 9 is part of a pneumatic cylinder 10.
  • the fixing bolt 9 is designed as a part matching the notch 8 and serves to fix the double arm in the working position shown in solid lines in FIGS. 1 and 2.
  • the operating position of the double arm is shown in Fig. 1 with dash-dotted lines.
  • Lower cylinders 11, 12, 13 and 14 are rotatably mounted on machine frame 2 by means of axes 15, 16, 17 and 18.
  • the lower cylinders 11, 12, 13 and 14 are individually driven (not shown).
  • the arc parts 5 each include an arcuate guide slot 19 coaxial with the axis 15 and the arc parts 6 each have an arcuate coaxial with the axis 17 Guide slot 20.
  • the guide slots 19 serve to guide a pair of bearing blocks 21 and 22 (only a part of the pair shown in FIG. 2), while the guide slots 20 serve to guide a pair of bearing blocks 23.
  • a guide slot 60 coaxial with the axis 18 is provided for guiding a pair of bearing blocks 25.
  • a pair of bearing blocks 22 is arranged at the entrance of the drafting system and a pair of bearing blocks 24 at the transition from the arch part 5 to the arch part 6 on the double arm 4.
  • the drafting system 1 comprises in the following order a pressure roller 27, rotatably mounted in the bearing block pair 22, a first pressure cylinder 28 delimiting the beginning of the pre-stretching zone, rotatably supported in the bearing block pair 21, one the end of the pre-stretching zone delimiting second pressure cylinder 29, rotatably mounted in the bearing block pair 24, a first pressure cylinder 30 delimiting the beginning of the main stretching zone, rotatably supported in the bearing block pair 23 and a second pressure cylinder 31 delimiting the end of the main stretching zone, rotatably supported in the bearing block pair 25.
  • the cylinders 11 and 28 form the first, viewed in the running direction of the sliver, the cylinders 12 and 29 the second, the pre-stretch zone delimiting sliver.
  • the cylinders 13 and 30 form the first, the cylinders 14 and 31 the second, the main stretching zone delimiting fiber sliver.
  • the bearing block pairs 24 and 22 are arranged in a fixed manner, while the bearing block pairs 21 and 23, respectively, the guide slots 19 and 20, respectively, are arranged to be movable and fixable again in order to adapt to the length of the sliver to be processed.
  • the pair of bearing blocks 25 is arranged in the guide slot 60 so as to be movable and fixable again in order to ensure the tangential entry of the sliver despite the changeable entry position of the sliver, caused by the displacement of the pressure cylinder 30.
  • raster teeth 32 and 32 are shown on the arc parts 5 and 6 (FIGS. 3 and 4). and a raster scale 33 corresponding to the number of teeth and, on the other hand, a raster device 34 which engages in the teeth 32 is provided on the bearing block pairs 21 and 23.
  • This grid device 34 is assigned to each individual bearing block of the bearing block pairs 21 and 23.
  • Such a bearing block comprises a bearing block lower part 35 with a guide port 36 for receiving and guiding a shaft bearing 37 of a pressure cylinder shaft 38.
  • a D impression cylinder shaft 38 is used to hold the platen roller 27 and the printing cylinders 28, 29, 30 and 31st
  • the lower bearing block 35 is also designed as a cylinder, with a piston 39, an associated piston rod 40, a spring 41, a compressed air connection 42 and a ventilation opening 43.
  • the end of the cylinder is used with the bearing block terteil 35 fixed bearing block upper part 44.
  • a guide pin 45 belonging to the raster device 34 is firmly screwed into the bearing block upper part 44 by means of thread 46 and serves to guide a raster part 47.
  • the raster part 47 can be against the Force of the spring 48 can be lifted off the upper bearing block 44.
  • the raster teeth 32 provided on the arch parts 5 and 6 engage in the teeth 49 provided in the raster part 47 when the raster part 47 rests on the bearing block upper part 44.
  • two guide pins 50 are pressed into the bearing block upper part 44, which protrude into the guide slots 19 and 20, respectively, and which are selected in diameter in such a way that this results in precise sliding guidance of the individual bearing block 21, 23, 25 along the guide slot 19, 20, 60 results.
  • a fixing screw 51 with nut 52 fixes the individual bearing blocks on the arch parts 5 and 6, or respectively on the end part 7.
  • the fixing screw 51 (FIGS. 3 and 4) is loosened, the raster part 47 is lifted from the upper part 44 of the bearing block 44 by manual force against the force of the spring 48, and the bearing block pair 21 is manually lifted and / or 23 on the arch part 5, respectively 6, adjacent to the Guide slot 19 or 20, along.
  • the degree of displacement can be read on the raster scale 33.
  • the bearing block pairs 24, 25 and 22 comprise the same elements as the described bearing block pairs 21 and 23 with the exception that the raster device 34 is omitted.
  • the bearing block pairs 24 and 22 are arranged in a fixed manner. The mobility of the bearing block pairs 25 will be described later.
  • the sliver 26 after the last sliver clamping point, given by the cylinders 14 and 31, is combined in a hopper 53 and passed on to a rotatably mounted pair of calender rolls 54 known per se.
  • the pair of calender rolls 54 consists of a fixedly arranged calender roll 55 and a calender roll 56 arranged displaceably therefrom.
  • the funnel 53 is arranged such that it can be tilted in the direction of the arrow B and projects with the sliver outlet part 57 into the sliver feed gap (not shown) of the pair of calender rolls 54.
  • the funnel 53 can be tilted in order to be able to comfortably guide the strip discharged from the last rollers 14 and 31 into the funnel.
  • the drafting device 1 can also be provided with a so-called push rod 58 (FIG. 5), which, provided in the main drawing zone, deflects the fiber sliver positively and in the process guides the fibers within the drawing zone as an aid.
  • a positive deflection means a deflection with a radius directed away from the machine frame 2 that will.
  • the push rod 58 is provided in the main stretching zone in such a way that when the clamping stretch of the main stretching zone is extended, given by the clamping points of the cylinder pairs consisting of the cylinders 13 and 30, or respectively 14 and 31, by pushing back the pressure cylinder 30 against that in FIG. 1 Position shown with dash-dotted line, the deflection around the push rod 58 is reduced.
  • the bearing block pair 25 is positioned or fixed in such a way that the sliver 26 is tangentially caught by the cylinders 14 and 31.
  • the drafting system 1 can be provided as a variant to the push rod 58 with a push rod 59 (FIG. 6) which deflects the sliver negatively.
  • a push rod 59 FIG. 6
  • the deflection of the sliver given by the push rod remains constant.
  • the bearing block pair 25 is shifted into the position shown in FIG. 6. In this position, the upper guide pins 50 (seen in the viewing direction according to FIG.
  • a pneumatic cylinder 62 which is pivotally connected to the machine frame 2 and whose piston rod end part 63 is connected to the two arm parts by means of a rod 64, serves to lift the arm parts 4 into the operating position shown in dash-dotted lines in FIG. 1 and thus to introduce a sliver into the drafting system 4 is connected.
  • the fiber sliver is placed over the lower cylinders 11, 12, 13, 14 and the funnel 53 tilted in direction B for introduction into the drafting system in the open position of the drafting system.
  • the drafting system is closed again by reversing the function of the cylinder 62 and locked again by reversing the function of the cylinder 10.
  • the drawn material is fed into the hopper 53 and into the pair of calender rolls 54.
  • the drafting system can then be switched to production.
  • short to long staple fibers is intended to mean cotton and chemical fibers with a staple length of up to 80 mm.
  • the stretching zone or the main stretching zone, is chosen to have a diameter of 90 mm, so that, when processing fibers with a stack length of 80 mm, a wrap angle of the fiber sliver on the lower cylinders mentioned can be guaranteed by experience of a maximum of 45 angular degrees.
  • a diameter was selected for the second sub-cylinder 14 of the main drawing zone which corresponds essentially to one third of the diameter of the first sub-cylinder 13 mentioned, for example of 28 mm.
  • ionizers can be used in a manner known per se.

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  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Textile Engineering (AREA)
  • Spinning Or Twisting Of Yarns (AREA)
EP84112016A 1981-04-06 1982-03-15 Procédé d'étirage d'une bande de fibres pour machines de filature Withdrawn EP0159395A1 (fr)

Priority Applications (1)

Application Number Priority Date Filing Date Title
EP84112016A EP0159395A1 (fr) 1981-04-06 1982-03-15 Procédé d'étirage d'une bande de fibres pour machines de filature

Applications Claiming Priority (3)

Application Number Priority Date Filing Date Title
CH230981 1981-04-06
CH2309/81 1981-04-06
EP84112016A EP0159395A1 (fr) 1981-04-06 1982-03-15 Procédé d'étirage d'une bande de fibres pour machines de filature

Related Parent Applications (1)

Application Number Title Priority Date Filing Date
EP82102082.3 Division 1982-03-15

Publications (1)

Publication Number Publication Date
EP0159395A1 true EP0159395A1 (fr) 1985-10-30

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ID=25690086

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EP84112016A Withdrawn EP0159395A1 (fr) 1981-04-06 1982-03-15 Procédé d'étirage d'une bande de fibres pour machines de filature

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EP (1) EP0159395A1 (fr)

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP1739214A2 (fr) * 2005-06-27 2007-01-03 Maschinenfabrik Rieter Ag Dispositif pour le guidage forcé d'une partie supérieure d'un sytème d'étirage dans un machine de préparation de filature
CN103917707A (zh) * 2011-09-21 2014-07-09 莱因哈特·科尼格 用于纺纱编织设备的折叠拉伸单元
TWI631247B (zh) * 2012-02-17 2018-08-01 德商韶爾零件公司 用於牽引粗紡紗的牽引裝置

Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR443922A (fr) * 1912-05-15 1912-10-05 Wladimir Schevelin Procédé et appareil pour la fabrication du filé avec des fibres de longueur égale ou inégale et courte de préférence
FR880968A (fr) * 1941-12-03 1943-04-12 Blin & Blin Perfectionnements à l'étirage des boudins et mèches de fibres textiles
US2388760A (en) * 1941-12-01 1945-11-13 Casablaneas High Draft Company Drafting mechanism for textile fibers
FR1196694A (fr) * 1958-06-06 1959-11-25 Duvivier Et Six Pere & Fils Perfectionnements aux systèmes étireurs pour machines de filature
GB871873A (en) * 1958-03-12 1961-07-05 Rieter Joh Jacob & Cie Ag Improvements relating to drafting arrangements for textile spinning machines

Patent Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR443922A (fr) * 1912-05-15 1912-10-05 Wladimir Schevelin Procédé et appareil pour la fabrication du filé avec des fibres de longueur égale ou inégale et courte de préférence
US2388760A (en) * 1941-12-01 1945-11-13 Casablaneas High Draft Company Drafting mechanism for textile fibers
FR880968A (fr) * 1941-12-03 1943-04-12 Blin & Blin Perfectionnements à l'étirage des boudins et mèches de fibres textiles
GB871873A (en) * 1958-03-12 1961-07-05 Rieter Joh Jacob & Cie Ag Improvements relating to drafting arrangements for textile spinning machines
FR1196694A (fr) * 1958-06-06 1959-11-25 Duvivier Et Six Pere & Fils Perfectionnements aux systèmes étireurs pour machines de filature

Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP1739214A2 (fr) * 2005-06-27 2007-01-03 Maschinenfabrik Rieter Ag Dispositif pour le guidage forcé d'une partie supérieure d'un sytème d'étirage dans un machine de préparation de filature
EP1739214A3 (fr) * 2005-06-27 2009-04-08 Maschinenfabrik Rieter Ag Dispositif pour le guidage forcé d'une partie supérieure d'un sytème d'étirage dans un machine de préparation de filature
CN103917707A (zh) * 2011-09-21 2014-07-09 莱因哈特·科尼格 用于纺纱编织设备的折叠拉伸单元
CN103917707B (zh) * 2011-09-21 2016-02-17 莱因哈特·科尼格 用于纺纱编织设备的折叠拉伸单元
TWI631247B (zh) * 2012-02-17 2018-08-01 德商韶爾零件公司 用於牽引粗紡紗的牽引裝置

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