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
  • B65H51/00—Forwarding filamentary material
  • B65H51/02—Rotary devices, e.g. with helical forwarding surfaces
  • B65H51/04—Rollers, pulleys, capstans, or intermeshing rotary elements
  • B65H51/08—Rollers, pulleys, capstans, or intermeshing rotary elements arranged to operate in groups or in co-operation with other elements
  • B65H51/12—Rollers, pulleys, capstans, or intermeshing rotary elements arranged to operate in groups or in co-operation with other elements in spaced relation to provide a series of independent forwarding surfaces around which material is passed or wound
• • B—PERFORMING OPERATIONS; TRANSPORTING
  • B65—CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
  • B65H—HANDLING THIN OR FILAMENTARY MATERIAL, e.g. SHEETS, WEBS, CABLES
  • B65H57/00—Guides for filamentary materials; Supports therefor
  • B65H57/28—Reciprocating or oscillating guides
• • B—PERFORMING OPERATIONS; TRANSPORTING
  • B65—CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
  • B65H—HANDLING THIN OR FILAMENTARY MATERIAL, e.g. SHEETS, WEBS, CABLES
  • B65H59/00—Adjusting or controlling tension in filamentary material, e.g. for preventing snarling; Applications of tension indicators
  • B65H59/10—Adjusting or controlling tension in filamentary material, e.g. for preventing snarling; Applications of tension indicators by devices acting on running material and not associated with supply or take-up devices
  • B65H59/36—Floating elements compensating for irregularities in supply or take-up of material
• • B—PERFORMING OPERATIONS; TRANSPORTING
  • B65—CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
  • B65H—HANDLING THIN OR FILAMENTARY MATERIAL, e.g. SHEETS, WEBS, CABLES
  • B65H59/00—Adjusting or controlling tension in filamentary material, e.g. for preventing snarling; Applications of tension indicators
  • B65H59/38—Adjusting or controlling tension in filamentary material, e.g. for preventing snarling; Applications of tension indicators by regulating speed of driving mechanism of unwinding, paying-out, forwarding, winding, or depositing devices, e.g. automatically in response to variations in tension
  • B65H59/382—Adjusting or controlling tension in filamentary material, e.g. for preventing snarling; Applications of tension indicators by regulating speed of driving mechanism of unwinding, paying-out, forwarding, winding, or depositing devices, e.g. automatically in response to variations in tension using mechanical means
• • 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 invention relates to the technical field of continuous elongated material processing machines, especially textile yarns, which will be referred to hereinafter by the term “yarn”, according to the twisting methods, “simple torsion ",” Double twist “,” direct wiring “...
• the son worked passes through a torsion pin (3) entering an axial and radial channel (4) of said torsion pin, opens on a cylindrical or conical portion arranged on the periphery of a plate (5) integral with the pin (3). ) and turning with this one.
• this wire (Fl) leaves said reserve and forms a balloon (6) which surrounds a pot or cradle (7) arranged coaxially to spindle (3) before reaching a fixed point (10).
• the yarn (s) thus transformed (FT) exits (ent) the system with a tension essentially determined by the combination of centrifugal force, aerodynamic forces and friction experienced by said yarn in its rotation.
• the yarn (s) thus transformed (FT) is (are) generally then wound (s) on a support to form a coil (14).
• the winding tension of the wire (FT) should be lowered and kept as constant as possible.
• the transmitter is a device that pulls the wire (FT) under the voltage resulting from the upstream process and delivers it under a lowered voltage.
• the gated emitters where the wire is subject to sinuate between two disk-shaped grids whose surfaces have corrugations or conjugate reliefs.
• the said grids are rotated so that their tangential velocity at the points of contact with the wire is substantially greater than the speed of travel of the wire, creating a tensile force by the effect of the friction between the wire and the wires. corrugated surfaces of grids.
• Capstan-type issuers as represented by reference numeral (13), in FIGS. 1 and 2, formed of two substantially cylindrical buckets, of parallel axis or forming an angle between them.
• the wire is wound by forming several turns passing successively from one bucket to the other, at least one of the two buckets being rotated at a peripheral speed equal to or greater than the speed of travel of the wire, creating a force of traction by the effect of friction between the wire and its surface.
• the speed of travel of the wire (FT) at the output of the transmitter is fixed by the downstream system, in particular by the winding device.
• the present invention relates to capstan type issuers.
• the operation of a capstan to lower the wire tension of the value resulting from the twisting or wiring process to that required to form a proper coil-shaped winding is well known to those skilled in the art and is described in this art. which follows in a succinct manner.
• the tensile force exerted on the wire is substantially proportional to the winding arc of the wire on the bucket, to the local wire tension and to the coefficient of friction between the wire and the surface of the bucket.
• a yarn accumulator system for example constituted by at least one movable detent member. such as a wheel or a wire guide, and able to absorb by moving the (or) member (s) mobile (s) a length of wire, according to the known principle of the puppets on the winding systems.
• This solution solves only partially the problems posed. More sophisticated systems for regulating the voltage at the capstan output have been proposed, based for example on the installation of a voltage sensor associated with an electronic processing acting on the overspeed, but these systems are particularly expensive.
• twisting or cabling machines consisting of an alignment of With many work positions side by side, this solution requires providing each working position with an individual motor and an individual servo system, instead of a conventional collective capstan drive system.
• the device comprises:
• a capstan composed of at least one motorized cup having on at least a part of its length an evolutionary diameter, said part constituting a zone of entry of the wire, the speed of rotation of said bucket being such that at least in one point, its peripheral speed is greater than the drive speed of the wire;
• At least one wire guide positioned upstream of said bucket, at the right of the portion of evolving diameter, said wire guide being mounted with displacement capacity so as to move the point of entry of the wire;
• An accumulator system of the wire positioned downstream of the bucket and having arrangements capable of absorbing a quantity of wire;
• connection between the mobile element (s) of the accumulator system and the wire guide can be carried out according to any mechanical means known by those skilled in the art, such as, by way of non-limiting examples, a system of rods, angle gears, screw nut, cams, etc.
• the tension exerted by the mobile element (s) on the wire determining the winding voltage is substantially constant whatever the position of said element (s) ( s) mobile (s).
• said tension exerted on the wire is obtained by the own weight of (or) movable elements.
• this tension is obtained by the action of a spring or by a combination of its own weight and the action of a spring.
• the action of the spring can be adjustable for example by moving its attachment point
• this tension is obtained by the action of a jack to which an adjustable pressure is applied.
• FIG. 1 is a general diagram explaining the direct wiring method according to the state of the art
• FIG. 2 is a general diagram explaining the double twist process according to the state of the art
• FIG. 3 is a general diagram of the device according to the invention.
• FIG. 4 is a general diagram of the device according to the invention, when the quantity of yarn absorbed in the accumulator system decreases,
• FIG. 5 is a general diagram of the device according to the invention, when the quantity of yarn absorbed in the accumulator system increases,
• FIG. 6 shows a first example of an embodiment of the mechanical connection between the accumulator system and the wire guide in top view
• FIG. 7 shows a second exemplary embodiment of the mechanical connection between the accumulator system and the wire guide in top view
• Figure 8 shows a second exemplary embodiment of the mechanical connection between the accumulator system and the wire guide in side view.
• the invention relates to the technical field of wire processing machines according to the twisting methods, "single twist”, “double twist”, “direct wiring”, shown schematically in Figures 1 and 2. We refer to the analysis that is made in the introductory part of the description.
• the invention has been designed and developed a device adapted to lower the tension of the thread (FT) between the twisting or cabling system direct (3 to 10) and the winding system (14) to make the winding voltage more constant and more stable.
• the device comprises the following elements considered in combination:
• the displacement of the wire guide (17) is substantially parallel to the axis of the conical portion (s),
• a yarn accumulator system comprising at least one movable detent member (16), such as a wheel or a yarn guide, arranged (s) downstream of the capstan (13), and able to absorb, by the moving (or) movable member (s) (16), a length of yarn according to the known principle of the puppets,
• the wire guide (17) is moved towards the small diameter of the (or) portion (s) conical (s) or diameter of evolution for the wire (FT) enters on a smaller diameter
• the thread guide (17) is displaced towards the large diameter of the conical part (s) or of progressive diameter so that the wire (FT) enters on a larger diameter.
• the pulling force of the wire (FT) by the capstan therefore results from the friction of the peripheral surface of the motorized bucket and therefore its "overspeed" with respect to the wire.
• the pulling force of the thread (FT) by the capstan becomes too small and therefore the quantity of thread delivered per unit of time is reduced.
• the quantity of deficient wire delivered is returned by the accumulator system which causes a displacement in the opposite direction of (or) movable member (s) (16) of said accumulator system.
• the mechanical link (18) transmits this displacement to the wire guide (17) so that the wire (FT) approaches the capstan to a larger diameter.
• the wire approaches the bucket at a point where the peripheral speed of the bucket is greater, increasing the frictional force, and therefore the pulling force of the wire.
• the device permanently establishes a correction of the efficiency of the capstan to maintain a quantity of accumulated wire substantially constant, and therefore a winding voltage downstream of the substantially constant device.
• the mechanical connection between the mobile element (s) (16) of the accumulator system and the wire guide (17) can be carried out according to any means known to those skilled in the art, such as , as non-limiting examples, a system of connecting rods, angle references, screw nut, cams, etc.
• the mechanical connection may be suitable for carrying out the invention as long as the forces to be provided by the mobile element (s) (16) of the accumulator system to actuate the movement of the wire guide (17), are substantially lower, and preferably less than 50% of the forces applied by the wire (FT) on said (or said) element (s) mobile (s) (16).
• Two examples of embodiment of the mechanical connection between the accumulator system and the wire guide according to the invention are given in the following.
• the accumulator system consists of a wheel (16) disposed at the end of an arm (19) mounted with angular displacement capacity around an axis (20) and connected to the wire guide (17) by a link (22).
• the increase or decrease in the amount of thread (FT) accumulated results in a rotation of the arm (19), which rotation is transformed by the rod (22) in a translation of the guide wire (17), parallel to the the axis of the bucket (15).
• the accumulator system consists of a wheel (16) disposed at the end of an arm (19) having a displacement capacity angularly about an axis (20) associated with a support (21) of the guide wire (17) by a screw-nut system.
• the direction and the screw pitch of the screw nut system are chosen so that a + 15 ° rotation of the arm relative to the horizontal causes a translation of about 3 mm from the wire guide ( 17) towards the large diameter of the bucket (16) and that a rotation of -15 ° of the arm relative to the horizontal causes a translation of about 3 mm from the guide wire (17) towards the small diameter bucket (16).
• the tension exerted by the movable member (s) (16) on the wire guide (17) determining the tension of winding is substantially constant regardless of the position of said (or said) element (s) mobile (s) (16).
• said tension exerted on the wire (FT) is obtained by the own weight of the mobile element (s) (16).
• the arm (19) and its wheel (16) such that they have a substantially horizontal average position, and a capacity of rotation preferably of plus or minus 15 ° around this position, and that they have a weight and a center of gravity such as compared to the wheel (16), they represent a force substantially equal to twice the winding tension desired.
• the arm (19) and the wheel (16) exert on the wire a voltage equal to the desired winding voltage.
• this tension is obtained by the action of a spring or by a combination of the own weight of the mobile element (s) (16) and the action of a spring.
• the action of the spring can be adjustable for example by moving its attachment point
• this tension is obtained by the action of a jack to which an adjustable pressure is applied.
• the invention can be realized with simple and relatively inexpensive mechanical means.
• the drift of the parameters influencing the efficiency of the capstan, are compensated by the device object of the present invention.
• the following test was carried out by direct wiring of polyester threads.
• a machine in operation has been voluntarily subjected to variations in ambient temperature of 22 ° C to 45 ° C and humidity variations of 50% to 85%.
• Such variations have resulted, in the absence of the device object of the invention, by variations of coils voltages of plus or minus 50 grams around a mean winding voltage of 150 grams.
• the variation of the winding voltage has been reduced to plus or minus 20 grams around the average value of winding.

Landscapes

• Engineering & Computer Science (AREA)
• Mechanical Engineering (AREA)
• Tension Adjustment In Filamentary Materials (AREA)
• Forwarding And Storing Of Filamentary Material (AREA)
• Spinning Methods And Devices For Manufacturing Artificial Fibers (AREA)

Applications Claiming Priority (2)

Publications (1)

Family

ID=47023023

Family Applications (1)

Country Status (3)

Families Citing this family (6)

Family Cites Families (4)

• 2011
  • 2011-10-04 FR FR1158925A patent/FR2980784B1/fr active Active
• 2012
  • 2012-09-26 EP EP12773090.1A patent/EP2763924A1/de not_active Withdrawn
  • 2012-09-26 WO PCT/FR2012/052158 patent/WO2013050686A1/fr active Application Filing

Non-Patent Citations (1)

Also Published As

Similar Documents

Legal Events