Classifications

• • D—TEXTILES; PAPER
  • D01—NATURAL OR MAN-MADE THREADS OR FIBRES; SPINNING
  • D01H—SPINNING OR TWISTING
  • D01H7/00—Spinning or twisting arrangements
  • D01H7/02—Spinning or twisting arrangements for imparting permanent twist
  • D01H7/52—Ring-and-traveller arrangements
  • D01H7/60—Rings or travellers; Manufacture thereof not otherwise provided for ; Cleaning means for rings
  • D01H7/602—Rings

Definitions

• the present invention concerns a ring for ring spinning and ring twisting machines, with a traveler flange and an annular traveler support surface arranged below the traveler flange on the ring inside, extending toward the inside, and connected with the traveler flange by a ring web.
• a ring for such type a so-called “non-unthreading ring”, is known, which compared to the ordinary ring not provided with a traveler support surface, shows the advantage that upon stopping the working position - independently of whether the whole machine or just the working position concerned is stopped, eg for piecing a broken end - the traveler can rest with its inside leg on the traveler support surface and thus blocks the unthreading path of the thread or yarn. The thread or yarn thus remains trapped between the ring and the traveler and cannot unthread from the traveler.
• the danger of unthreading is influenced by certain conditions, such as e.g. the type of material to be spun and the twist imparted to the yarn.
• the danger of unthreading increases with increasing twist, as a highly twisted yarn or thread tends to contract and to form loops over the path from the drafting arrangement onto the traveler and to the bobbin package while the spindle is at a standstill.
• the yarn is often pulled out of the traveler, i.e. is unthreaded under these circumstances.
• a ring of the type mentioned is known, in which the desired effect of "non-unthreading" is to be achieved by a combination of characteristics, which concern the ring as well as the traveler which rotates on the ring.
• the traveler shape is chosen more closed than normally used.
• the two open traveler legs arebent in hook form more towards the bridge of the traveler.
• the traveler flange of the ring contains on its lower part (at both sides of the ring web) a groove into which the hooked traveler legs can penetrate deeper under the flange than with ordinary rings.
• a traveler support surface is provided below the traveler flange on the ring inside, which support surface is connected with the traveler flange via a cylindrical ring web, against which support surface the inner leg of the traveler rests while the traveler is at a stood still.
• the traveler support surface in this arrangement is provided as an annula surface, an angle of about 120 being enclosed between the traveler support surface and the inner wall of the cylindri ring web adjacent to it.
• This known ring shows the disadvantage that the use of a Special traveler is required which is of more closed'form than ordinary travelers, and which further is to be coordinated with a Special traveler flange with fitting grooves. On such a ring, placing and exchanging travelers are quite complicated operations. The known ring notwithstanding does not present sufficient safeguard against the danger of un-threading.
• a ring for ring spinning and ring twisting machines with a traveler flange and with an annular traveler support surface arranged below the travel- 1er flange on the inside of the ring, connected with the traveler flange via a ring web, and extending toward the in ⁇ side, characterized in that between the traveler support surface and the adjacent inside wall of the ring web, which extends substantially vertically, an angle of less than 105 ° is enclosed, and that the inside diameter of the traveler support surface ranges between 95% and 105% of the inside diameter of the traveler flange.
• the ring consists, in a manner known as such from the Japanese Utility Application cited, of two rigidly asse bled rings, the outer ring of which forms the traveler support surface.
• the two rings are assembled preferentially by applying an adhesive.
• the ring forming the traveler support surface conists of plastic material.
• the traveler support surface can be contained in a plane extending parallel to the traveler flange.
• the traveler support surface is provided with an inside edge, the radius of which ranges from 0.1 to 0.3 mm.
• FIG. 1 the inventive ring shown schematically, during 95 Operation of the spinning position, in a section plane containing the ring axisj
• Figs. 2 a detail each of the ring according to Fig. 1, and 3 namely in Fig. 2 during Operation of the spinning 100 position and in Fig. 3 while the spinning position is at a standstill;
• FIG. 4 the ring of the arrangement according to Figures 1 through 3, the traveler not being shown, also 105 in a section plane containing the ring axis;
• Fig. 5 an alternative design exa ple of the inventive ring.
• a yarn or thread bobbin 2 is placed on a rotatably supported spindle 1 of a ring spinning or rin twisting position not shown in more detail.
• the spindle 1 is rotated by means not sh
• a ring 5 is non-rotatably mounted in a cor- responding bore 4 concentrically with the spindle 1, on the
• the inventive ring 5 is provided below the traveler flange with a part 12 which facing a substantially vertical ring we 11 (Fig. 2) protrudes toward the ring center, the shoulder o which part 12 facing the traveler flange 6 forms a traveler
• a substantially vertical wall is understood in this context to 130 designate a cylindrical wall or also a wall extending slightly conically.
• the ring 5 is to fulfill the following two requirements, namely:
• the angle enclosed between the traveler support sur- 175 face 13 and the inner wall 14, adjacent to it, of the substantially vertical ring web 11 is to be smaller than 105. Larger angles et do not sufficiently preclude the danger of unthreading;
• the inside diameter d of the traveler support surface 1 is to be chosen in the ranks of 95% to 105% of the insid diameter D of the traveler flange 6.
• the inside diameter d is chosen too s all, the bobbin package diameter m (Fig. 1) is reduced correspondingly, which for productivity reasons is undesirable.
• the above entioned 200 requirement for the inside diameter d takes care of all these factors and has proven to be an Optimum.
• the radius r can be established, na ely that the radius r is to be chosen in the ranks from 0.1 and 0.3 mm. This ranks for the radius r has proven to be an Optimum for ensuring that the traveler support surface 13 yields its fill usefulness and for pre-venting any danger of damaging the bobbin package 2 by cutting
• the ring consists, in a manner known as such, of two rigidly joined rings 22 and 23, the outer ring 22. of which forms the traveler flange 24
• the ring 23 furthermore can be ade ade of a suit- able plastic material, and the two rings 22 and 23 can be joined adhesively along their co mon line of contact 26.
• the use of an adhesive as a method of joining the rings is parti-
• Fig. 5 a particularly advantageous embodiment is shown, in which the traveler support surface is arranged in a plane
• the advantages of the present invention are seen in its simplicity, which permits the use of traveler shapes and traveler 230 flange shapes which are available on the market, and in the high reliability concerning the elimination of the danger of unthreading. Furthermore, if the inside diameter d is chosen smaller than D, a desirable protection against damages to th traveler flange and a reduction of hairiness of the bobbin package surface can be achieved. Furthermore, the proposed ring, which does not contain any grooves on the underside of the traveler flange, to a large extent is unsusceptible with respect to waste and dust accumulations.

Landscapes

• Engineering & Computer Science (AREA)
• Mechanical Engineering (AREA)
• Textile Engineering (AREA)
• Spinning Or Twisting Of Yarns (AREA)

Applications Claiming Priority (2)

Publications (1)

Family

ID=4394174

Family Applications (1)

Country Status (8)

Families Citing this family (5)

Family Cites Families (5)

• 1977
  • 1977-11-09 CH CH1364977A patent/CH624717A5/de not_active IP Right Cessation
• 1978
  • 1978-10-14 WO PCT/EP1978/000019 patent/WO1979000249A1/de unknown
  • 1978-10-14 GB GB7920976A patent/GB2036097B/en not_active Expired
  • 1978-10-23 IT ITMI1978U23120U patent/IT7823120U1/it unknown
  • 1978-11-06 AR AR274356A patent/AR214377A1/es active
  • 1978-11-07 ES ES1978239531U patent/ES239531Y/es not_active Expired
• 1979
  • 1979-05-22 EP EP78900226A patent/EP0007952A1/de not_active Withdrawn
• 1980
  • 1980-01-21 FR FR8001378A patent/FR2443520A1/fr active Granted

Non-Patent Citations (1)

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