EP0840815A1 - Motorized yarn twisting head - Google Patents
Motorized yarn twisting headInfo
- Publication number
- EP0840815A1 EP0840815A1 EP96927543A EP96927543A EP0840815A1 EP 0840815 A1 EP0840815 A1 EP 0840815A1 EP 96927543 A EP96927543 A EP 96927543A EP 96927543 A EP96927543 A EP 96927543A EP 0840815 A1 EP0840815 A1 EP 0840815A1
- Authority
- EP
- European Patent Office
- Prior art keywords
- motor
- speed
- circuit
- head
- power supply
- 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.)
- Granted
Links
Classifications
-
- 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
- D01H1/14—Details
- D01H1/20—Driving or stopping arrangements
- D01H1/24—Driving or stopping arrangements for twisting or spinning arrangements, e.g. spindles
- D01H1/244—Driving or stopping arrangements for twisting or spinning arrangements, e.g. spindles each spindle driven by an electric motor
Definitions
- the present invention relates to a motorized head for processing threads, of the type defined in the preamble of Claim 1.
- Conventional machines for processing threads such as spinning machines, twisting machines, spiral covering machines, doubling machines, texturizing machines, winders, et cetera, use processing heads that have the purpose of supporting a spindle or spool of thread while the thread is unwound and subjected to twisting, spiral covering, doubling, or other similar operations.
- Each head is essentially formed by a fixed support for the spindle and by a rotating part that moves the thread at high speed, on the order of 15,000 rpm.
- the rotation is imparted by a single motor that transmits motion to a long row of heads, with rather antiquated transmission devices, such as for example annular belts that are placed in sliding contact with pulleys formed on the axis of the heads.
- the same motor can also be used to actuate, by means of gears, linkages, and various transmission devices, other movements of the machine, such as the oscillation of the beams or thread-guiding eyes or the rotation of the thread spoolers or winders.
- the speed of the single motor of the machine is controlled by means of an adapted electric circuit.
- This arrangement has the advantage that if a power supply failure occurs, all the components decelerate in step and therefore do not produce tensions or breakages of the thread.
- the conventional machines produce a very high noise and have low mechanical efficiency.
- a machine of normal size can in fact have 100 to 300 heads driven simultaneously by these transmission devices, which are subject to considerable friction and impacts, and all together generate noise levels of up to 100 dB. Because of this, the assigned personnel must constantly wear protective earplugs or headsets, which however do not fully eliminate the risk of irreversible damage to the auditory system and often do not comply with health regulations.
- the aim of the present invention is to eliminate the drawbacks described above by providing a motorized head with rotating spindle, particularly for thread processing, that features low noise, high efficiency, low cost, and very compact size.
- a motorized head with rotating spindle of the type defined in the introduction, characterized in that the motor devices consist, for each head, of a single electric motor of the high-efficiency brushless type directly coupled to the rotor, an electronic circuit for speed and power supply control, independent of the circuit of other heads, being associated with the motor.
- a head of this type producers low noise because it avoids conventional-type transmission devices, and has low consumption because of the use of electrically highly efficient brushless motors.
- a head of this type also has a high precision due to the fact that it uses a separate control circuit.
- the speed and power supply control circuit of the motor is a miniaturized frequency converter, built into the frame of the motor.
- the power supply current of the control circuit of the converter and the current that supplies power to the motor are both at low voltage, eliminating all risks for the assigned personnel.
- a head with these characteristics allows to achieve a manufacturing cost reduction, also by virtue of the mass- production of custom-built integrated circuits.
- Figure 1 is a schematic side view of a head with rotating spindle according to the invention
- Figure 2 is an electric diagram of a thread processing machine that uses a series of head with rotating spindle according to the invention.
- a head according to the invention comprises a hollow pivot 2 that acts as support for a spindle or reel 3 of thread and is open in an upper region to allow the passage of a thread 4.
- the lower part of spindle 3 is surrounded by a rotor 5 that has a hollow central shaft 6 that is connected to pivot 2 and to a radial hole 7 for the passage of thread 4.
- Shaft 6 of rotor 5 is directly coupled to an actuation motor 8.
- shaft 6 is formed monolithically from the shaft of motor 8.
- Motor 8 can be provided with studs 9 for anchoring the entire head to a supporting frame 10 of a thread processing machine, for example a twisting machine, so as to allow interchangeability of the head 1 with other heads of the same type.
- Motor 8 is of the brushless type, with cylindrical permanent magnets and with high efficiency, between 70% and 85%, even for low power levels on the order of 70W, as indeed required for the heads according to the invention.
- small brushless motors with cylindrical permanent magnets are used which have been applied so far in computer hard disks, compact discs, and similar devices.
- a frequency-variation speed converter 11 is associated with motor 8 to control the power supply and the speed of the motor, promptly adapting them, without any manual or mechanical actuation of the coupling to the motor, as a function of the type and thickness of the thread to be processed. It also ensures extremely accurate speed control, with an error of less than 1% with respect to the preset speed.
- converter 11 is miniaturi zed so that it is inserted and integrated in the frame of motor 8 and so as to be suppli ed together with it , achieving great compactness with respect to previous heads .
- Converter 11 is connected to the power supply bus by means of cables 12 and to a microprocessor-based central control unit 14 by means of cables 13.
- Unit 14 can be connected to other motors 15 for the actuation of different devices, for example thread guiding eyes or winders that are associated with each individual head, by means of respective converters 16.
- Central unit 14 also internally comprises a closed-loop regulator circuit 17, using for example a P.I.D. regulator, which has the purpose of synchronizing the deceleration of the individual heads with the deceleration of the other devices associated with them if mains power fails; this circuit is of the type described and claimed in the Italian patent application No. VI95A000112 in the name of this same Applicant.
- a closed-loop regulator circuit 17 using for example a P.I.D. regulator, which has the purpose of synchronizing the deceleration of the individual heads with the deceleration of the other devices associated with them if mains power fails; this circuit is of the type described and claimed in the Italian patent application No. VI95A000112 in the name of this same Applicant.
- the power supply current of motor 8 is at low voltage, for example 48V.
- the same bus to supply the converters as well, providing considerable reductions in insulation costs and increasing the intrinsic safety of the unit, since the assigned personnel can safely handle the heads with no danger of electrocution.
- the motorized head with rotating spindle according to the invention achieves the intended aim and all of the objects, and in particular its high efficiency, its low noise level, and its compact size, flexibility, and safety are pointed out.
Landscapes
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Textile Engineering (AREA)
- Spinning Or Twisting Of Yarns (AREA)
Abstract
Description
Claims
Applications Claiming Priority (3)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
ITVI950122 | 1995-07-26 | ||
IT95VI000122A IT1281615B1 (en) | 1995-07-26 | 1995-07-26 | MOTORIZED HEAD FOR YARN PROCESSING |
PCT/EP1996/003169 WO1997005310A1 (en) | 1995-07-26 | 1996-07-18 | Motorized yarn twisting head |
Publications (2)
Publication Number | Publication Date |
---|---|
EP0840815A1 true EP0840815A1 (en) | 1998-05-13 |
EP0840815B1 EP0840815B1 (en) | 1999-10-06 |
Family
ID=11425834
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
EP96927543A Expired - Lifetime EP0840815B1 (en) | 1995-07-26 | 1996-07-18 | Motorized yarn twisting head |
Country Status (6)
Country | Link |
---|---|
EP (1) | EP0840815B1 (en) |
JP (1) | JPH11509897A (en) |
AU (1) | AU6734396A (en) |
DE (1) | DE69604590T2 (en) |
IT (1) | IT1281615B1 (en) |
WO (1) | WO1997005310A1 (en) |
Families Citing this family (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE69917517T2 (en) * | 1998-03-13 | 2005-06-30 | Murata Kikai Kabushiki Kaisha | Textile machine with single spindle drive |
DE10257980B4 (en) * | 2002-01-18 | 2016-01-14 | Heidelberger Druckmaschinen Ag | Power supply management in paper processing machines |
Family Cites Families (7)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE3717749A1 (en) * | 1987-05-26 | 1988-12-15 | Zubler Geraetebau | Method for the active prevention of thread breaks on spinning-machine, twisting-machine and winding-machine drives and for their fully automatic setting to maximum production/regulating out speeds |
GB2229458A (en) * | 1989-03-23 | 1990-09-26 | Hollingsworth | Ring spinning,ring doubling and ring twisting frames |
FR2646175B1 (en) * | 1989-04-25 | 1991-06-14 | Icbt Lyon | TWISTING SPINDLE DRIVEN BY A SINGLE ELECTRIC MOTOR |
US5161361A (en) * | 1991-08-30 | 1992-11-10 | Platt Saco Lowell Corporation | Motor-driven spindle assembly for ring spinning |
DE4315775C2 (en) * | 1992-05-29 | 1994-12-08 | Skf Textilmasch Komponenten | Spindle in textile machines for yarn production |
DE4224755A1 (en) * | 1992-07-27 | 1994-02-03 | Budig Peter Klaus Prof Dr Sc T | Separate spindle motor control - has a setting system for each motor with programs for start=up and brake operations |
JPH07111757A (en) * | 1993-10-13 | 1995-04-25 | Hitachi Ltd | Brushless dc motor |
-
1995
- 1995-07-26 IT IT95VI000122A patent/IT1281615B1/en active IP Right Grant
-
1996
- 1996-07-18 WO PCT/EP1996/003169 patent/WO1997005310A1/en active IP Right Grant
- 1996-07-18 JP JP9507196A patent/JPH11509897A/en not_active Ceased
- 1996-07-18 DE DE69604590T patent/DE69604590T2/en not_active Expired - Fee Related
- 1996-07-18 EP EP96927543A patent/EP0840815B1/en not_active Expired - Lifetime
- 1996-07-18 AU AU67343/96A patent/AU6734396A/en not_active Abandoned
Non-Patent Citations (1)
Title |
---|
See references of WO9705310A1 * |
Also Published As
Publication number | Publication date |
---|---|
DE69604590D1 (en) | 1999-11-11 |
ITVI950122A0 (en) | 1995-07-26 |
JPH11509897A (en) | 1999-08-31 |
IT1281615B1 (en) | 1998-02-20 |
DE69604590T2 (en) | 2000-07-13 |
WO1997005310A1 (en) | 1997-02-13 |
ITVI950122A1 (en) | 1997-01-26 |
AU6734396A (en) | 1997-02-26 |
EP0840815B1 (en) | 1999-10-06 |
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