EP0118024B1 - Procédé et dispositif de parallélisation de fibres spécialement pour fibres de coton et synthétiques - Google Patents
Procédé et dispositif de parallélisation de fibres spécialement pour fibres de coton et synthétiques Download PDFInfo
- Publication number
- EP0118024B1 EP0118024B1 EP84101002A EP84101002A EP0118024B1 EP 0118024 B1 EP0118024 B1 EP 0118024B1 EP 84101002 A EP84101002 A EP 84101002A EP 84101002 A EP84101002 A EP 84101002A EP 0118024 B1 EP0118024 B1 EP 0118024B1
- Authority
- EP
- European Patent Office
- Prior art keywords
- fibres
- cylinder
- sheet member
- metallic
- feeder
- 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.)
- Expired
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Classifications
-
- D—TEXTILES; PAPER
- D01—NATURAL OR MAN-MADE THREADS OR FIBRES; SPINNING
- D01H—SPINNING OR TWISTING
- D01H4/00—Open-end spinning machines or arrangements for imparting twist to independently moving fibres separated from slivers; Piecing arrangements therefor; Covering endless core threads with fibres by open-end spinning techniques
- D01H4/28—Open-end spinning machines or arrangements for imparting twist to independently moving fibres separated from slivers; Piecing arrangements therefor; Covering endless core threads with fibres by open-end spinning techniques using electrostatic fields
Definitions
- the invention relates to a method and a device for the parallelization of fibres being fed rectilinearly, changing direction, and placed one on top of the other in a parallelized form.
- the system is based on a simple geometric model without complex mechanisms and employing the principles and properties of electrostatic fields. Accordingly, the invented simple practical arrangement can be useful also for other uses.
- the US-A-2 557 433 refers to a spinning method, whereby fibres are twisted one around the other because of frictional, rotational (inertial) and electrostatic forces.
- the electrostatic charging of the fibres, together with the acting centrifugal forces, effects the disassociating of the upper ends of the fibres from each other immediately, prior to being formed into the strand, whereby uneven tensions between individual fibres and the internal torsions within fibres are virtually eliminated and a stronger strand can be produced thereby.
- Subclaims 2 and 3 comprise a device for performing the method of claim 1.
- Claims 4to 7 relate to using the device according to claim 2.
- Fig. 1 shows the method of fibre parallelization in a perspective view.
- Separated fibres 8 for instance, cotton fibres
- a cylinder 2 made of insulating material (for instance, plexiglass) and the metallic semicylindrical apron 3 which is formed in the upper part in such manner as to allow the fibres to enter freely without being obstructed.
- the fibres 8 with the help of an air-suction device 4 descend in parallel to the axis AA of the cylinder, gradually changing their direction to that perpen- dicularto the above axis because offorces generated by an electrostatic field which is formed by the friction of the body of the device and by means of the metallic apron 3 inside of the device.
- the fibres are accumulated in parallelized form at the groove 7 on the bottom of the metallic apron 3 and with the aid of air-suction drawn through the slot 5 underneath the bottom of the groove 7 of the above-mentioned apron 3. What happens thereafter depends on the specific use of the fibres.
- the descending fibres come into contact with part 6.
- an electrostatic field is formed at the metallic apron 3, which causes the fibres to twist, wherein the fibres, by their sliding along the straight portion of the metallic apron 3, are mechanically allowed only to perform twisting in the direction towards the groove 7.
- Fig. 2 shows a section (through axis AA) with the fibre feeder 1, the metallic apron 3, the cylinder 2 made of insulating material, the groove 7 on the bottom of the apron 3, the semicircular part 6, the slot 5, and the air-suction device 4.
- the insulating properties of the fibres, cellulose in the case of cotton, give them the behavior of a bipole (polarization of a dielectric material).
- the fibres because of friction with the immediate environment develop electrostatic loads at their ends and therefore behave like bipoles.
- the fibres move through the electrical field which is formed by the surface of the metallic apron 3 and the inner surface of the cylinder 2 made of insulating material, they are reoriented by the influence of forces of electrical repulsion and attraction and thus assumethe desired direction which is perpendicular to the one they originally had when they entered the interior of the device.
- the length and the type of the fibre, the type of insulating material, the relative humidity of the interior and exterior environments and the properties of the air-suction system compose the variables and parameters of the invention.
- FIG. 3 A use of the invention for ring spinning processes is shown in Fig. 3. As shown, the fibres 8 from the card sliver are separated and thrown by the fibre feeder 1 into the fibre parallelization system.
- a suction system 4 which is installed on a perforated drum 9 causes the fibres to cohere on its external surface in a continuous and parallelized form.
- FIG. 4 Another use of this invention for Open-End spinning processes is shown in Fig. 4 and is the result of research for yarn production by open-end methods to obtain the same, perhaps better characteristics, strength, and uniformity from those achieved with the ring spinning method.
- the fibres 8 of the card sliver are separated and thrown by the fibre feeder 1 into the fibre parallelization system.
- the fibres cohere in parallelized form in a perforated groove 7.
- the sliver must be positioned onto the contact point of the delivery rollers 12 passing through a hole 13 and subsequently the system is put in rotary motion (in such a direction as to obtain an S or Z-yarn configuration as required).
- a third use of the invention is the Open-End spinning process with twin parallelization of fibres explained in Fig. 5 and is the result of research to obtain improvements in mixing parallelized fibres during the spinning process.
- the fibres 8 from the card sliver are separated and thrown by the fibre feeder 1 into the parallelization system for twin fibre parallelization.
- the air-suction device 4 forces the fibres to descend and be separated in two groups under the influence of the self-maintaining electrostatic field inside of the device where a twin partitioning apron is positioned the two parts 19, 20 of which are separated with an insulating material 18, but which have a common groove 7 and a common straight part 33.
- FIG. 6 A fourth use of the invention, the Open-End spinning process employing a special rotor, is explained in Fig. 6 and consists of the fiber parallelizer, the rotor 21, the delivery system 12, and the cone formation 14.
- the friction of the fibres in the area 24 forces them to twist.
- the twist slides and is losened and, when the others are twisted to the right towards the exit of the rotor 21, the twist remains forming by the pulling of the delivery cylinders a yarn of Z or S-type which depends on the direction of the rotation of the rotor 21.
- FIG. 7 A fifth use of the invention, the Open-End spinning system with two deliveries of yarn, is explained in Fig. 7 and consists of the fibre parallelizer having a thin slot 28 on its bottom and a pair of perforated cylinders 25 thereunder both rotating in the same direction.
- the two pairs of cylinders 26 bearing the spinning equalizer-discs 27 also rotate in the same direction.
- the equalizer discs 27 are intended for the regulation of the spinning process. With the change in the direction of rotation of the pairs of cylinders 25 and 26, a Z or S-type yarn is produced which, after passing through the delivery cylinders 12 is wound on a bobbin 14.
Claims (7)
Applications Claiming Priority (4)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
GR70401A GR71278B (fr) | 1983-02-03 | 1983-02-03 | |
GR70401 | 1983-02-03 | ||
GR73532A GR73380B (fr) | 1984-01-17 | 1984-01-17 | |
GR73532 | 1984-01-17 |
Publications (2)
Publication Number | Publication Date |
---|---|
EP0118024A1 EP0118024A1 (fr) | 1984-09-12 |
EP0118024B1 true EP0118024B1 (fr) | 1988-04-27 |
Family
ID=26316644
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
EP84101002A Expired EP0118024B1 (fr) | 1983-02-03 | 1984-02-01 | Procédé et dispositif de parallélisation de fibres spécialement pour fibres de coton et synthétiques |
Country Status (2)
Country | Link |
---|---|
EP (1) | EP0118024B1 (fr) |
DE (1) | DE3470758D1 (fr) |
Families Citing this family (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
GR900100373A (el) * | 1990-05-16 | 1992-07-30 | Alexios Mamasioulas | Μέ?οδοι συνεχούς παραγωγής νήματος με περιστρεφόμενο κύλινδρο μέσω παραλληλιστού ινών. |
Family Cites Families (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US2557433A (en) * | 1948-04-17 | 1951-06-19 | Honig Frank | Art of producing yarn |
US3537249A (en) * | 1969-07-28 | 1970-11-03 | Us Agriculture | Process and apparatus for making a textile strand |
US3768243A (en) * | 1971-04-12 | 1973-10-30 | Us Agriculture | Yarn twist control apparatus for electrostatic spinner |
-
1984
- 1984-02-01 EP EP84101002A patent/EP0118024B1/fr not_active Expired
- 1984-02-01 DE DE8484101002T patent/DE3470758D1/de not_active Expired
Also Published As
Publication number | Publication date |
---|---|
DE3470758D1 (en) | 1988-06-01 |
EP0118024A1 (fr) | 1984-09-12 |
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