Classifications

• • D—TEXTILES; PAPER
  • D04—BRAIDING; LACE-MAKING; KNITTING; TRIMMINGS; NON-WOVEN FABRICS
  • D04B—KNITTING
  • D04B15/00—Details of, or auxiliary devices incorporated in, weft knitting machines, restricted to machines of this kind
  • D04B15/18—Dials

Definitions

• the invention relates to a double jersey circular knitting machine with a cylinder bed and a needle dial supporting knitting means and arranged concentrically around the machine axis, while the cylinder bed is arranged on a cylinder bed support pivoted in the machine bed and the needle dial is
• Double jersey circular knitting machines are used for production of a knitted fabric by a motion of knitting means, as a rule needles, positioned in grooves arranged parallel with a needle cylinder axis and radially on a needle dial. Needles are in their grooves by a known manner actuated in a periodic reverse motion by turning of the beds using cam system in the direction of grooves. Nevertheless a cylinder bed is fitted by a well known manner on a cylinder bed support and the needle dial is by a well known manner fitted on the needle dial support, which is connected with a bottom part of an axle, which is coaxiaily arranged with the axis of a machine.
• the goal of the invention is to eliminate or at least to substantially minimize the drawbacks of the known solutions.
• the goal of the invention has been reached by a double jersey knitting machine, whose principle consists in that between an outer part of a needle dial support for fixation of a needle dial and an inner part of the needle dial support and/or between the needle dial support and the needle dial are arranged temperature compensation means radially movable in a limited range for stabilization of differences in heat dilatation of the needle dial and the needle dial support.
• the temperature compensation means radially movable in a limited range are composed of radially flexible ring arranged coaxiaily with the machine axis and situated between the outer and inner part of the needle dial support.
• the radially flexible ring cross section in a shape of a symmetric or asymmetric U-shape, whose arms are up turned or down turned and one of the arms is connected with the inner part of the needle dial support and the second arm is connected with the outer part of the needle dial support.
• the radially flexible ring cross section consisting of a thin-walled cylindrical part arranged coaxiaily with the machine axis, while the bottom part of the thin-walled cylindrical part is connected with the outer part of the needle dial support and the upper part of the thin-walled cylindrical part is connected with the inner part of the needle dial support.
• the radially flexible ring cross section consisting of a thin-walled cylindrical part arranged coaxiaily with the machine axis, while the upper part of the thin-walled cylindrical part is connected with the outer part of the needle dial support and the bottom part of the thin-walled cylindrical part is connected with the inner part of the needle dial support.
• the temperature compensation means radially movable in a limited range are composed of radially movable means connecting the needle dial with the needle dial support.
• the temperature compensation means radially movable in a limited range composed of substantially horizontally arranged flanges situated on the outer circumference of the needle dial support and on the inner circumference of the needle dial, while the flanges are situated above each other and in one of the flanges are in parallel with the machine axis arranged openings, to which is assigned a stud or a pin intervening by its second straight or eccentrically arranged end into a radially arranged groove in the second flange, while the flanges are together in the perpendicular direction to the flanges connected by means with limited thrust and with the possibility of mutual radial shift of the flanges.
• the needle dial support is arranged in the shape of a plate perpendicular to the machine axis, while according to one preferred embodiment is the needle dial support on its upper and/or bottom part fitted with radial ribs.
• centring eccentric members which are pivoted along the axes parallel to the machine axis and which centre the needle dial, while on the needle dial is concentrically with the machine axis arranged a centring seating assigned to the centring eccentric members.
• Fig. 1 represents an example of embodiment of a heat dilatation compensator of a needle dial in the shape of radially flexible ring with U-shaped cross section and a needle dial support
• Fig. 1a represents an example of embodiment of a heat dilatation compensator of the needle dial in the shape of radially flexible ring as a thin-walled cylindrical part, connected on top with the inner part and on bottom with the outer part of the needle dial support
• Fig. 1b represents an example of embodiment of a heat dilatation compensator of the needle dial in the shape of radially flexible ring as a thin-walled cylindrical part, connected on top with the outer part and on bottom with the inner part of the needle dial support
• Fig. 1 represents an example of embodiment of a heat dilatation compensator of a needle dial in the shape of radially flexible ring as a thin-walled cylindrical part, connected on top with the outer part and on bottom with the inner part of the needle dial support
• Fig. 1 represents an example of embodiment of a heat dila
• FIG. 1c represents a vertical section of one of centring eccentric members arranged on the outer part of the needle dial support
• Fig. 2 represents an example of embodiment of one arrangement of fixation of the needle dial on the support
• Fig. 3 represents an example of embodiment of a heat dilatation compensator of the needle dial with radially movable means and the needle dial support according to Fig. 2
• Fig. 3a represents a bottom view of the heat dilatation compensator of the needle dial and the needle dial support from Fig.
• Fig. 3b represents a plane A-A section from Fig. 3
• Fig. 4 represents another example of embodiment of a heat dilatation compensator of the needle dial with radially movable means and the needle dial support according to Fig. 2
• Fig. 4a represents a bottom view of the heat dilatation compensator of the needle dial and the needle dial support from Fig. 4
• Fig. 4b represents a plane B-B section from Fig. 4.
• a needle dial 6 support 4 is fixed on the bottom end of a centre shaft 1 and the outer part 42 of the needle dial 6 support 4 is formed basically as a horizontal flange, on whose upper surface is mounted the needle dial 6 using screws 43 and means 44 for positioning the radial and axial position.
• Above the needle dial 6 are by an appropriate manner on the flange 21 on the bottom end of the centre shaft 1 bush 2 positioned dish shaped needle cams 9 with needle cams 8.
• the machine is fitted with a heat dilatation compensator of the needle dial 6 and the needle dial 6 support 4, while the common feature of further described variants of the heat dilatation compensator of the needle dial 6 and the needle dial 6 support 4 is that the heat dilatation compensator of the needle dial 6 and the needle dial 6 support 4 is formed by temperature compensation means radially movable in a limited range.
• the outer part 42 of the needle dial 6 support 4 near its inner edge thinned by a groove 420, which forms a ring exhibiting higher flexibility than other parts of the outer part 42 of the needle dial 6 support 4.
• the thinned part of the outer part 42 of the needle dial 6 support 4 and the inner part 41 of the needle dial 6 support 4 are connected with a heat dilatation compensator, which is formed as an integral part of the needle dial 6 support 4, for instance in the example of embodiment shown in Fig. 1 as a U- shaped radially flexible ring 45 with U-shaped arms turned down.
• the diameter of U-shape wall is smaller compared to the diameter of the wall of other parts 41 , 42 of the needle dial 6 support 4, so that the U-section exhibits required flexibility in radial direction, while maintaining the rigidity in other directions.
• the heat dilatation compensator can be realized also with another advantageous profile, which exhibits radial flexibility, for instance it can be formed as a thin-walled cylinder 452, 453 (see Fig. 1a, 1b) or its profile can be S- or Z- shaped or it can be formed by other appropriate means.
• the principle of the heat dilatation compensator in this part of the double jersey circular knitting machine is always in analogy to the above described principle of the heat dilatation compensator with the U-shaped profile.
• the heat dilatation compensator formed in another appropriate arrangement, while it is always a question of in a temperature compensation means radially movable in a limited range.
• centring of the needle dial 6 using eccentric centring members 422 shown in example of embodiment according to Fig. 1c pivoted around axes parallel to the machine axis on studs 4222 in openings arranged on the circumference of the outer part 42 of the needle dial 6 support 4.
• the centring members 422 can be turned for instance using hex key inserted into the hexagonal opening 4221.
• 3a and 3b are in the outer part 42 of the needle dial 6 support 4 formed openings 460. which are fitted with studs 461, on whose ends is a hexagonal opening 4610 and/or there are not represented facets for key used for turning the stud 461.
• the studs 461 are in the support 4 secured against spontaneous coming off for instance using a safety member 464 positioned on the support 4.
• the stud 461 On the upper end of the stud 461 is eccentrically positioned a pin 462, on which is mounted a block 463 fitting into the radially arranged groove 60 in the fixing flange 62 of the needle dial 6.
• the pin 462 and the block 463 are secured for instance using a lock ring 465.
• Turning of the studs 461 causes turning the eccentrically positioned pins 462 and consequently the blocks 463 traverse, by which means it is possible to exactly centre the needle dial 6.
• the needle dial 6 is to the support fastened only by a limited momentum defined by for instance by tightening torque used for tightening the screws 43 connecting the needle dial 6 support 4 or defined by the properties of disc springs optionally inserted under the heads of these screws 43.
• this embodiment can be performed in reverse order, that is the pins 471 with the eccentric members 472 and blocks 473 are positioned in outer part 42 of the needle dial 6 support 4 and the blocks fit into the radial grooves 421 in the needle dial 6. Also in this embodiment is employed the arrangement and the function of the screws 43 connecting the needle dial 6 support 4 and optional disc springs under heads of the screws 43. In the embodiment shown in Fig.
• 2, 2a, 2b, 3, 3a, 3b is the needle dial 6 while heating during the machine run more expanded than cooler support 4, while the limited thrust of the fixing screws 43 of the needle dial 6 to the needle dial 6 support 4 enables mutual radial traverse of the needle dial 6 and the needle dial 6 support 4, during which the studs 461 with the blocks 463 and eccentric members (for example eccentric pin 462, eccentric member 472) prevent undesirable tangential or lateral traverse of the needle dial 6, which retains the accuracy of the machine run and the quality of knitting.
• Industrial applicability The invention is applicable in double jersey circular knitting machines.

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• Engineering & Computer Science (AREA)
• Textile Engineering (AREA)
• Knitting Machines (AREA)

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• 2003
  • 2003-10-16 CZ CZ20032832A patent/CZ295462B6/cs not_active IP Right Cessation
• 2004
  • 2004-10-13 TW TW093130966A patent/TW200519251A/zh unknown
  • 2004-10-14 CN CNA2004800302896A patent/CN1867715A/zh active Pending
  • 2004-10-14 WO PCT/CZ2004/000066 patent/WO2005035851A1/en active Application Filing
  • 2004-10-14 EP EP04762318A patent/EP1673498A1/en not_active Withdrawn

Non-Patent Citations (1)

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