EP3956505B1 - Métier à tricoter circulaire et méthode de tricotage de tricots à mailles ajourées - Google Patents

Métier à tricoter circulaire et méthode de tricotage de tricots à mailles ajourées Download PDF

Info

Publication number
EP3956505B1
EP3956505B1 EP20718395.5A EP20718395A EP3956505B1 EP 3956505 B1 EP3956505 B1 EP 3956505B1 EP 20718395 A EP20718395 A EP 20718395A EP 3956505 B1 EP3956505 B1 EP 3956505B1
Authority
EP
European Patent Office
Prior art keywords
sinkers
work
open
needles
needle
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.)
Active
Application number
EP20718395.5A
Other languages
German (de)
English (en)
Other versions
EP3956505A1 (fr
Inventor
Maurizio LODRINI
Mauro ALGHISI
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Santoni SpA
Original Assignee
Santoni SpA
Priority date (The priority date 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 date listed.)
Filing date
Publication date
Application filed by Santoni SpA filed Critical Santoni SpA
Publication of EP3956505A1 publication Critical patent/EP3956505A1/fr
Application granted granted Critical
Publication of EP3956505B1 publication Critical patent/EP3956505B1/fr
Active legal-status Critical Current
Anticipated expiration legal-status Critical

Links

Images

Classifications

    • D—TEXTILES; PAPER
    • D04—BRAIDING; LACE-MAKING; KNITTING; TRIMMINGS; NON-WOVEN FABRICS
    • D04B—KNITTING
    • D04B1/00—Weft knitting processes for the production of fabrics or articles not dependent on the use of particular machines; Fabrics or articles defined by such processes
    • D04B1/10—Patterned fabrics or articles
    • D04B1/102—Patterned fabrics or articles with stitch pattern
    • D04B1/104—Openwork fabric, e.g. pelerine fabrics
    • 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
    • D04B15/06—Sinkers
    • 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
    • D04B15/32—Cam systems or assemblies for operating knitting instruments
    • D04B15/34—Cam systems or assemblies for operating knitting instruments for dials
    • D—TEXTILES; PAPER
    • D04—BRAIDING; LACE-MAKING; KNITTING; TRIMMINGS; NON-WOVEN FABRICS
    • D04B—KNITTING
    • D04B9/00—Circular knitting machines with independently-movable needles
    • D04B9/26—Circular knitting machines with independently-movable needles for producing patterned fabrics
    • D04B9/28—Circular knitting machines with independently-movable needles for producing patterned fabrics with colour patterns
    • D04B9/36—Intarsia work obtained by reciprocatory action
    • D—TEXTILES; PAPER
    • D04—BRAIDING; LACE-MAKING; KNITTING; TRIMMINGS; NON-WOVEN FABRICS
    • D04B—KNITTING
    • D04B9/00—Circular knitting machines with independently-movable needles
    • D04B9/26—Circular knitting machines with independently-movable needles for producing patterned fabrics
    • D04B9/38—Circular knitting machines with independently-movable needles for producing patterned fabrics with stitch patterns

Definitions

  • the present invention relates to a method for manufacturing an open-work knitted fabric on a circular knitting machine, and to a circular knitting machine configured for implementing said method.
  • the present invention relates to the sequence of movements for the mechanisms (needles and sinkers) of the circular knitting machine designed to manufacture an open-work knitted fabric.
  • the present invention relates to circular knitting machines configured for manufacturing fabrics with intarsia motifs (intarsia machines or argyle machines), which are also able to manufacture open-work knitted fabrics.
  • circular knitting machines comprise a needle-holding element (needle cylinder and/or plate) on which one or more series of needles are arranged along a circular path (circular needlebeds), and devices apt to control the movement of the needles for knitted fabric formation.
  • Knockover sinkers are arranged in radial seats obtained in a ring-shaped body (sinker crown) arranged around the needle-holding cylinder, and said sinkers cooperate with the needles so as to make knitted fabric.
  • Document GB449404 discloses a circular knitting machine equipped with sinkers arranged between the needles and on which interstitch rings are formed. At least one of these sinkers comprises a protruding lateral portion, which is configured for moving an interstitch ring onto an adjacent needle so as to create an opening in the knitted fabric.
  • Document GB377794 discloses a circular knitting machine equipped with a spreader provided with a pair of blades placed on opposed sides of a sinker and configured for spreading an interstitch and arranging it on one or both adjacent needles.
  • Document GB410831 discloses a circular knitting machine comprising some sinkers provided with an upper hook or with a pair of hooks placed on the sides of a traditional sinker. Said hooks are configured and moved so as to displace an interstitch on a pair of adjacent needles and make an open work in the fabric. A selector moves the sinker with the hook integrated therein when said hook must work.
  • the selector comprises an oscillating arm provided with butts interacting with a plurality of cams belonging to an actuating device.
  • a circular knitting machine configured for manufacturing fabrics with intarsia motifs (intarsia machine) is disclosed for instance in document EP1620590 issued to the same Applicant.
  • Intarsia is a knitting technique enabling to obtain motifs using yarns of different colors in the same knitted course. Intarsia technique is usually used for creating multicolored motifs. As for woodworking technique, which it shares the name with, fields with different colors and materials seem to be fitted together as in a puzzle. Differently from other multicolor knitting techniques, there is only "active" color on a given stitch and the yarn is not moved to the reverse. When a color changes on a given row/knitted course, the old yarn is left hanging.
  • Document FR1427471A discloses a circular knitting machine and a corresponding process for producing open-work knitted fabric using, in combination, conventional sinkers and open-work sinkers having a nose which is offset relative to the planar extension of the main body of the sinker itself.
  • the conventional sinkers and the open-work sinkers follow separated paths which are defined on a fixed guiding ring.
  • the conventional sinkers follow a predetermined path on the guiding ring and therefore they have a unique trajectory constant over time.
  • the guiding ring is provided with at least two different paths defining an inner trajectory and an outer trajectory. The transfer of the open-work sinkers from one trajectory to the other is determined by the activation of specific cams or actuators operatively active on the guiding paths.
  • Document US6286343B1 shows a device for the selection of the sinkers for the manufacture of designed terry cloth knitwear on circular knitting machines and stocking knitting machines.
  • Each sinker of the device of US6286343B1 is capable of oscillations in a vertical plane between a canceled, resting position, in which its tail end is not intercepted by a return cam, and an operating position, in which its tail end interacts with the return cam for the longitudinal movements of the sinker.
  • Document FR2249198A1 discloses a circular knitting machine wherein hosiery is produced using multiple yarn supply stations disposed symmetrically about the needle cylinder.
  • Document WO2018/197971A1 describes a circular knitting machine comprises a needle-holding cylinder housing a plurality of needles, at least one yarn feed, actuating cams movable with respect to the needle-holding cylinder, a drive chain for each needle operatively placed between the respective needle and the actuating cams.
  • Document EP1524348A1 discloses a sinker selection device in a circular knitting machine, comprising for each radial slot of the sinker ring in which sinkers are accommodated, a selector facing the end of the corresponding radial slot directed away from the axis of the sinker ring.
  • the selector is oscillatable on a radial plane with respect to the sinker ring to pass from active to inactive positions to induce different actuation of the corresponding sinker along the corresponding radial slot.
  • a selection actuator is provided which laterally faces the sinker ring and can engage on command the selector for transfer from inactive to active positions.
  • Document EP0147139A2 shows a jacquard circular knitting machine provided with a needle cylinder driving mechanism capable of optionally and readily controlling the rotary motion of the needle cylinder according to the pattern to be knitted.
  • an aim underlying the present invention in its various aspects and/or embodiments, is to propose a method for manufacturing open-work knitted fabrics and a circular knitting machine enabling to manufacture open-work knitted fabrics with the most different features.
  • a further aim of the present invention is to propose a method for manufacturing open-work knitted fabric and a circular knitting machine which is able to manufacture open-work knitted fabrics, which are so flexible as to manufacture different fabrics as a function of the features of the open work to be obtained on the fabric.
  • a further aim of the present invention is to provide a method for manufacturing open-work knitted fabric and a circular knitting machine which is able to manufacture highly complex open-work knitted fabrics in relatively short manufacturing times.
  • a further aim of the present invention is to provide a method for manufacturing open-work knitted fabric and a circular knitting machine which is able to manufacture open-work knitted fabrics, enabling also to obtain further motifs and/or effects on the knitted fabric, for instance without having to reconfigure the machine itself or parts of it from a mechanical point of view.
  • a further aim of the present invention is to provide a circular knitting machine configured for manufacturing fabrics with intarsia motifs (intarsia machine or argyle machine), which is also able to manufacture open-work knitted fabrics according to the aims listed above.
  • the words “non-operating”, “withdrawn” and “dropped” relate to respective positions and functions of the needles.
  • the needles are in a fully lowered or retracted position in the needle-holding cylinder, such as not to pick the yarn supplied on the feed forming the loop.
  • the needles are in a raised position with respect to the non-operating position, such as to pick the textile yarn supplied by the yarn feed without dropping the knitted loop lying inside its needle head.
  • the needles are in a fully raised position, such as to pick the textile yarn supplied by the yarn feed dropping the knitted loop lying on its stem.
  • the invention relates to a circular knitting machine.
  • the circular knitting machine comprises:
  • the machine is configured for manufacturing an open-work knitted fabric and/or for implementing a method for manufacturing open-work knitted fabric.
  • the method comprises or the machine is configured for:
  • the textile yarn is fed one or more times on the protrusions of the open-work sinkers selected for making elongated interstitches and then said interstitches lying on the protrusions are dropped into the needle heads.
  • the Applicant has first found out that the invention enables to manufacture highly complex open-work knitted fabrics in relatively short times by working so as to make the interstitch by means of an alternating motion of the machine.
  • the Applicant has further found out that the invention enables to manufacture open-work knitted fabrics of various types and with the most different features by means of a specific selection of the open-work sinkers required for making the open work to be manufactured.
  • the Applicant has found out that the machine according to the invention is highly flexible since it allows to switch from manufacturing a type of knitted fabric to a different type in a fast and relatively simple manner.
  • the circular knitting machine is an intarsia machine, i.e. a machine configured for manufacturing fabrics with intarsia motifs (intarsia machine or argyle machine).
  • the circular knitting machine is configured for working with alternating rotary motion.
  • the circular, e.g. intarsia, knitting machine comprises at least two yarn feeds, or at least four feeds, each one configured for working with a respective group of needles arranged along an arc of circle by means of an alternating rotary motion of the needles around the central axis.
  • said at least two yarn feeds cooperate to form every knitted course by rotating in both directions.
  • at least one motor is operatively connected to the needle-holding cylinder and to the crown so as to make them rotate around the central axis.
  • cams and/or other types of devices are arranged around the needle-holding cylinder so as to turn the rotational motion of the needle-holding cylinder into an axial motion of the needles.
  • the machine comprises at least one selecting actuator laterally facing the circular needlebed, which can be engaged upon command, either directly or indirectly, with each of the open-work sinkers of said respective group of open-work sinkers.
  • the selected open-work sinkers are selected by means of said selecting actuator.
  • said at least one yarn feed is at a circumferential distance from the respective selecting actuator.
  • the needle-holding cylinder and the circular crown are rotatable around the central axis with respect to the selecting actuator.
  • the machine comprises a plurality of selecting actuators, for instance each one placed on a yarn feed that is operatively associated to a different selecting actuator.
  • the yarn feed is angularly offset with respect to the respective selecting actuator of an angle, e.g. of 90° to 180°.
  • the group of knockover sinkers and the group of open-work sinkers operatively associated to a yarn feed and to a selecting actuator have an angular extension, e.g. of 180° or less, e.g. of 90° or less, e.g. 45°.
  • the machine comprises four yarn feeds angularly offset one with respect to the other, i.e. of 90°, and four selecting actuators angularly offset one with respect to the other, e.g. of 90°, wherein each yarn feed, in order to make the open-work, is angularly offset with respect to the respective selecting actuator, e.g. of 90°.
  • each yarn feed comprises a yarn feeder.
  • the yarn feeder is movable between an operating position and a rest position.
  • the yarn feeder in the operating position is located radially outside the needlebed so as to allow the needles to catch the textile yarn.
  • the yarn feeder in the rest position is located radially inside the needlebed so as to prevent the needles from catching the textile yarn.
  • an open-work sinker is arranged on one side of at least some of the knockover sinkers.
  • an open-work sinker contributes to make a respective interstitch loop.
  • a right open-work sinker and a left open-work sinker are arranged on opposed sides of at least some of the knockover sinkers, i.e. each of the knockover sinkers is flanked by a pair of open-work sinkers and each pair of open-work sinkers contributes to make an interstitch loop.
  • each open-work sinker or each pair of (right and left) open-work sinkers cooperates with a single needle or with a pair of adjacent needles so as to make a respective interstitch loop.
  • knockover sinkers provided with the right open-work sinker and with the left open-work sinker are alternated with single knockover sinkers, i.e. without the right open-work sinker and the left open-work sinker.
  • the open-work sinker has a respective protrusion that is laterally offset with respect to the respective knockover sinker.
  • the right open-work sinker and the left open-work sinker exhibit respective protrusions that are laterally offset towards opposed sides of the respective knockover sinker and for instance placed above the respective knockover sinker.
  • the protrusions are configured for loading and stretching the interstitch and arrange it on a respective single needle or on two respective adjacent needles placed on opposed sides of the respective knockover sinker and form the open work. The use of two open-work sinkers for one knockover sinker allows to make wider, better defined open works, thus obtaining a balanced knitted fabric without twists or folds.
  • each knockover sinker provided with the open-work sinker, or with the right open-work sinker and with the left open-work sinker is housed in a respective groove together with said open-work sinker, or with said right open-work sinker and left open-work sinker.
  • each knockover sinker provided with the open-work sinker, or with the right open-work sinker and with the left open-work sinker is radially sliding in the respective groove and with respect to said open-work sinker.
  • the open-work sinker or the right open-work sinker and the left open-work sinker, is/are radially sliding in the respective groove and with respect to the respective knockover sinker.
  • each single knockover sinker is housed in a respective groove so as to radially slide in said groove.
  • the selected open-work sinkers are selected by means of a selecting actuator laterally facing the circular needlebed, which can be engaged upon command, either directly or indirectly, with each of the open-work sinkers of said respective group of open-work sinkers.
  • step i. is executed in the first direction of rotation only, in which the textile yarn is loaded onto the protrusions of the selected open-work sinkers at least twice, so as to make a double interstitch, at least on a first yarn feed and on a second yarn feed placed one after the other.
  • step ii. is executed in the second direction of rotation only, in which the double interstitch lying on the protrusions is dropped onto the second yarn feed.
  • the textile yarn is loaded onto the open-work sinkers on the first feed and is loaded again onto the same open-work sinkers on the second feed so as to make two elongated interstitches. Then, while the needle-holding cylinder and the circular crown rotate in the second direction of rotation, said two elongated interstitches are unloaded into the needle heads on the second feed.
  • step i. is executed before, while the needle-holding cylinder and the circular crown rotate in the first direction of rotation and then in the second direction of rotation, in which the textile yarn is loaded onto the protrusions of the selected open-work sinkers at least twice, so as to make a double interstitch, on the same single yarn feed.
  • step ii. is executed while the needle-holding cylinder and the circular crown rotate in the first direction of rotation, in which the double interstitch lying on the protrusions is dropped onto the protrusions on said single yarn feed.
  • the textile yarn is loaded onto the open-work sinkers on a feed while the needle-holding cylinder and the circular crown rotate in the first direction of rotation, and is loaded again onto the same open-work sinkers on the same feed while the needle-holding cylinder and the circular crown rotate in the second direction of rotation so as to make two elongated interstitches. Then, while the needle-holding cylinder and the circular crown rotate in the first direction of rotation, said two elongated interstitches are loaded into the needle heads on the same feed.
  • step i. the method comprise (or the machine is configured for):
  • step ii. while the rotation goes on beyond said at least one yarn feed, the needles do not pick the textile yarn from said yarn feed. Therefore, the needles do not make any stitch by only contribute to the open-work.
  • a yarn feeder of said yarn feed is moved to a rest position so that the needles do not pick the textile yarn from said yarn feed.
  • step ii. while the rotation goes on beyond said at least one yarn feed, the needles pick a further yarn so as to make a stitch cooperating with the knockover sinkers.
  • the needles beyond contributing to the open-work, the needles also make a stitch.
  • a yarn feeder of said yarn feed remains in an operating position so that the needles pick the further textile yarn from said yarn feed.
  • step ii. comprises (or the machine is configured for):
  • the needle-holding cylinder and the circular crown rotate in the second direction of rotation until the group of needles, the group of knockover sinkers and the group of open-work sinkers are moved back upstream from the respective selecting actuator.
  • all the open-work sinkers of said group of open-work sinkers are selected for manufacturing open-work knitted fabric.
  • steps i. and ii. only some of the open-work sinkers of said group of open-work sinkers are selected for manufacturing portions of open-work knitted fabric.
  • radially moving the selected open-work sinkers away from the central axis in the intermediate position comprises: moving a transfer cam so as to catch and deviate butts of said selected open-work sinkers.
  • further moving the selected open-work sinkers as far as said backward position comprises: moving an auxiliary transfer cam so as to catch and deviate butts of said selected open-work sinkers.
  • the selecting actuator is kept in a non-operating position and the needle-holding cylinder and the circular crown are put in rotation in the first direction of rotation so that each of the open-work sinkers of the group of open-work sinkers remains in the backward position until the yarn feed is passed over and while the open-work sinkers remain in the backward position and the needles remain in the lowered position, so as to reset the operating sequence without making any stitch.
  • the direction of rotation of the needle-holding cylinder and of the circular crown is reverted by lifting and then lowering the needles so as to make a stitch with the textile yarn fed by said yarn feed in cooperation with the knockover sinkers while the needle-holding cylinder and the circular crown rotate in the second direction of rotation until the group of needles, the group of knockover sinkers and the group of open-work sinkers are moved again upstream from the respective selecting actuator with respect to the first direction of rotation.
  • the method comprises:
  • the machine comprises at least one guiding ring operatively associated to the crown, wherein the crown is rotatable with respect to the guiding ring and around the central axis.
  • each knockover sinker has a butt engaged with a first guide obtained in the guiding ring and developing around the central axis; wherein the first guide is configured for moving the knockover sinker radially along the respective radial groove when the crown rotates with respect to the guiding ring and around the central axis.
  • each open-work sinker has a butt that is or can be engaged with a second guide obtained in the guiding ring and developing around the central axis, wherein the second guide defines a plurality of trajectories for the open-work sinker, wherein the second guide is configured for moving the open-work sinker radially when the crown rotates with respect to the guiding ring and around the central axis.
  • the machine comprises a selector operatively coupled with each open-work sinker, wherein the selector is movable, e.g. oscillating, in a radial plane between a rest position and an operating position, wherein in the operating position the selector acts directly or indirectly upon the open-work sinker so as to deviate the butt of the open-work sinker along a trajectory of the second guide.
  • each knockover sinker has a nose configured for making terry stitches in cooperation with the needles.
  • the machine comprises a selector operatively coupled with each knockover sinker, wherein the selector is movable, e.g. oscillating, in a radial plane between a rest position and an operating position, wherein in the operating position the selector acts directly or indirectly upon the knockover sinker so as to deviate the butt of the knockover sinker along a trajectory of the first guide.
  • the selecting actuator laterally faces the crown, fixed with respect to the guiding ring, that can be engaged under control with the selectors and is configured for causing the selectors to switch from the rest position to the operating position.
  • the machine comprises a plurality of pushing units, each associated to a selector and to an open-work sinker or to a knockover sinker.
  • the selector rests against the pushing unit and the pushing unit is configured for pushing against the open-work sinker or against the knockover sinker.
  • the guiding ring comprises a third guide extending around the central axis and defining a plurality of trajectories.
  • each pushing unit exhibits a butt that is or can be engaged with the third guide.
  • the guiding ring comprises a circular track extending around the central axis.
  • each selector e.g. the base portion of each selector, is slidingly engaged into the circular track so as to rotate together with said at least one open-work sinker or knockover sinker.
  • the numeral 1 globally designates a portion of a knitting head of a circular knitting machine according to the present invention.
  • the circular knitting machine shown is a machine configured for manufacturing fabrics with intarsia motifs (intarsia machine or argyle machine).
  • the circular knitting machine comprises a basement, not shown since it is of known type, constituting the supporting structure of the machine, and said knitting head 1 is mounted onto the basement.
  • the knitting head 1 is equipped with a needle-holding cylinder 2, with a plurality of needles 3 mounted onto the needle-holding cylinder 2, and with control means, not shown, apt to selectively actuate the needles 3 so as to enable the production of a fabric.
  • the needle-holding cylinder 2 is usually mounted in vertical position onto the basement, with the needles 3 arranged vertically and protruding beyond an upper edge of the needle-holding cylinder 2.
  • the needles 3 have heads 3A arranged around the central axis "X-X" so as to define a circular needlebed.
  • the needle-holding cylinder 2 has a plurality of longitudinal grooves obtained on a radially outer surface of the needle-holding cylinder 2.
  • the longitudinal grooves are arranged around a central axis "X-X" (vertical) of the needle-holding cylinder 2 and develop parallel to said central axis "X-X".
  • Each longitudinal groove houses a respective needle 3 and a respective drive chain comprising a plurality of flat parts.
  • Actuating cams are arranged as a casing around the needle-holding cylinder 2 and lie facing the radially outer surface of the cylinder 2 and thus the longitudinal grooves and the drive chains. These actuating cams are defined e.g. by plates and/or grooves arranged on an inner surface of the casing.
  • the casing of the actuating cams is basically stationary, whereas the needle-holding cylinder 2 rotates (with a continuous or alternating motion in both directions) around the central axis "X-X" by means of a suitable motor, so as to generate a relative rotational motion between the drive chains and the actuating cams and turn the rotational motion of the needle-holding cylinder 2 into an axial motion of the needles 3 in order to manufacture knitted fabric by means of the said needles 3.
  • the machine further comprises a circular crown 4 arranged around the needle-holding cylinder 2 and having a plurality of radial grooves 5 and auxiliary radial grooves 6 that are open on a radially inner edge of the circular crown 4, i.e. towards the central axis "X-X".
  • the radial grooves 5 and the auxiliary radial grooves 6 alternate along a circumferential development of the circular crown 4, i.e. each radial groove 5 is flanked by two auxiliary radial grooves 6 and each auxiliary radial groove 6 is flanked by two radial grooves 5.
  • the circular crown 4 is moved in rotation around the central axis "X-X" together with the needle-holding cylinder 2, e.g. by means of the same motor.
  • Suitable devices feed the yarns to be knitted on one or more yarn feeding points (known as feeds) usually arranged above the needle-holding cylinder 2.
  • the circular intarsia knitting machine shown comprises four yarn feeds, each one configured for working with a respective group of needles 3 arranged along an arc of circle (e.g. a 90° arc) by means of an alternating rotary motion of the needles 3 around the central axis "X-X".
  • the four feeds cooperate to form every knitted course by rotating in both directions.
  • Each yarn feed is provided with a yarn feeder 7 (which can be seen in a schematic manner in Figures 7A - 30A ) consisting e.g. of an eyelet through which the yarn goes so as to be directed towards the needlebed for the needles 3.
  • Each yarn feeder 7 is movable between an operating position and a rest position. In the operating position, the yarn feeder 7 is located radially outside the needlebed for the needles 3 so as to allow the heads 3A of the needles 3 to catch the textile yarn ( Figures 7A-24A ). In the rest position, the yarn feeder 7 is located radially inside the needlebed for the needles 3 and lifted from the needlebed for the needles 3 so as to prevent the heads 3A of the needles 3 from catching the textile yarn ( Figures 25A-29A ).
  • Each of the radial grooves 5 houses a first assembly made up of a plurality of metal flat parts that can slide radially in the respective radial groove 5 and also one with respect to the other.
  • This first assembly comprises a knockover sinker 8, a right open-work sinker 9, a left open-work sinker 10, two pushing units 11, one associated to the right open-work sinker 9 and the other one to the left open-work sinker 10, and a selector 12 for each of the pushing units 11.
  • the knockover sinker 8 comprises a main body shaped as a horizontal flat bar oriented as the radial groove 5, i.e. along a radial direction, and a vertical flat upright developing from the horizontal flat bar.
  • a pin 13 having a per se known shape is arranged on an upper end of the vertical flat upright and faces the central axis "X-X" when the first assembly is properly mounted to the machine.
  • the knockover sinker 8 further comprises a flat butt 14 extending vertically upwards from the horizontal flat bar and at a distance from a radially outer end (with respect to the central axis "X-X") of the horizontal flat bar.
  • the knockover sinker 8 is made up of a single flat metal part, e.g. a cut part.
  • the pins 13 of the knockover sinkers 8 are configured for cooperating with the needles 3 for manufacturing plain knitted fabric.
  • the right open-work sinker 9 comprises a main body shaped as a horizontal flat bar and a vertical flat upright developing from the horizontal flat bar.
  • a protrusion 15 is arranged on an upper end of the flat upright.
  • the protrusion 15 extends like a sort of arm, when the first assembly is properly mounted to the machine, towards the central axis "X-X" and is offset laterally with respect to a lying plane of the respective main body.
  • the right open-work sinker 9 further comprises a flat butt 16 extending vertically upwards from the horizontal flat bar and is placed near a radially outer end (with respect to the central axis "X-X") of the horizontal flat bar.
  • the right open-work sinker 9 is made up of a single flat metal part, e.g. a cut, stamped and/or bent part.
  • the left open-work sinker 10 comprises the same elements as the right open-work sinker 9 and is structurally identical with or corresponding to the right open-work sinker 9, except for the fact that the respective protrusion 15 is offset/displaced, with respect to its main body, to the opposed side.
  • the right open-work sinker 9 and the left open-work sinker 10 therefore have respective protrusions 15 that are laterally displaced in opposed directions with respect to its main body and with respect to the knockover sinker 8 placed between them.
  • the first assembly is properly mounted in the respective radial groove 5
  • the right open-work sinker 9 and the left open-work sinker 10 are arranged on opposed sides of the respective knockover sinker 8 ( Figure 3 ).
  • the right open-work sinker 9 and the left open-work sinker 10 exhibit respective protrusions 15 that are laterally offset towards opposed sides of said knockover sinker 8 and placed above the pin 13 of the respective knockover sinker 8.
  • the butt 14 of the knockover sinker 7 is radially placed between the butt 16 and the protrusion 15 of the respective open-work sinkers 9, 10.
  • the two protrusions 15 are configured for loading and stretching an interstitch and arrange it on a single needle 3 or on two adjacent needles 3 placed on opposed sides of the respective knockover sinker 8 and form an open work.
  • a single protrusion can be configured for loading and stretching a respective interstitch and arrange it on a single needle 3 or on two adjacent needles 3.
  • the two pushing units 11 of the first assembly are identical with one another.
  • Each of the pushing units 11 comprises a horizontal flat bar and a butt 17 that is flat, is placed on a radially outer end, with respect to the central axis "X-X", of the horizontal flat bar and extends vertically upwards.
  • the pushing unit 11 further has an abutment surface facing the central axis "X-"X and configured for resting against the respective open-work sinker 9, 10.
  • the abutment surface of the pushing unit 11 is placed near the butt 17 of said pushing unit 11, i.e. near said radially outer end of the horizontal flat bar.
  • the pushing unit 11 is made up of a single flat metal part, e.g. a cut part.
  • each pushing unit 11 When the first assembly is properly mounted in the respective radial groove 5 ( Figure 3 ), the horizontal flat bar of each pushing unit 11 is located under and in contact with the flat bar of the respective open-work sinker 9, 10 and the abutment surface faces the radially outer end of the respective open-work sinker 9, 10.
  • the knockover/terry sinker 8 is placed between the right and left open-work sinkers 9, 10.
  • Each of the two selectors 12 is a metal, basically flat element mainly developing vertically when it is properly mounted in the machine.
  • the selector 12 has a base portion 18 with a rounded profile and configured for oscillating around an axis tangent to a horizontal circumference with its center in the central axis "X-X".
  • the selector 12 lies and oscillates in a radial plane.
  • the selector 12 further exhibits an abutment portion 19 at a distance from the base portion 18, pointing towards the central axis "X-X" and configured for indirectly acting upon the respective open-work sinker 9, 10 through the respective pushing unit 11.
  • the selector 12 further has a tooth 20 located on an edge of the flat element radially opposed to the abutment portion 19 and radially pointing outwards, i.e. to the opposed side with respect to the central axis "X-X".
  • the abutment portion 19 has a rounded projection configured and sized for resting against the radially outer end of the horizontal flat bar of the respective pushing unit 11 of the first assembly.
  • Each selector 12 is oscillating in the radial plane between a rest position and an operating position.
  • the abutment portion 19 of the selector 12 In the rest position, the abutment portion 19 of the selector 12 is located in a radially outer position and does not get in contact with the respective pushing unit 11.
  • the selector 12 In the operating position, the selector 12 is rotated towards the central axis "X-X", the abutment portion 19 of the selector 12 is located in a radially inner position and is configured for resting and pushing against the respective pushing unit 11 towards the central axis "X-X".
  • the pushing units 11 are configured in their turn for pushing the open-work sinkers 9, 10.
  • select actuators 21 ( Figures 6 , 7A-30A and 7B-30B ) acting upon the tooth 20 of the selector 12 and whose structure shall be described in more detail below.
  • there are four selecting actuators 21 ( Figure 6 ) which are stationary with respect to the casing and are arranged at the same angular distance (e.g. 90° from one another) around the circular crown 4.
  • each of said selecting actuators 21 is located on a yarn feed.
  • the knockover sinker 8 is pushed by a respective pushing unit 11' and by a respective selector 12', which are wholly similar to the pushing unit 11 and to the selector 12. For this reason the same elements have been referred to with the same reference numerals with an apostrophe.
  • the selector 12' exhibits a base portion 18' and an abutment portion 19' at a distance from the base portion 18', pointing towards the central axis "X-X" and configured for indirectly acting upon the respective knockover sinker 8 through the respective pushing unit 11'.
  • the selector 12' further has a tooth 20' located on an edge of the flat element radially opposed to the abutment portion 19' and radially pointing outwards, i.e.
  • the abutment portion 19' has a rounded projection configured for resting against the radially outer end of the respective horizontal flat bar of the pushing unit 11'.
  • Each of the pushing units 11' further exhibits a respective butt 20' and a respective abutment surface configured for resting against the respective knockover sinker 8.
  • the knockover sinker 8 is further provided with a nose 22 so as to make terry stitches in cooperation with the needles 3.
  • the position of the tooth 20' of the selector 12' differs from the one of the teeth 20 of the two selectors 12, so that the selecting actuators 21 can catch the teeth 20 or as an alternative the teeth 20' depending on whether the first assembly should work for making a hole in the fabric or make a terry stitch, respectively.
  • Each of the auxiliary radial grooves 6 houses a second assembly which is also made up of a plurality of metal flat parts that can slide radially in the respective auxiliary radial groove 6 and also one with respect to the other.
  • This second assembly comprises a single knockover sinker 8, a respective pushing unit 11' and a respective selector 12' which are identical or basically identical with the ones described above, so that they will not be described again here and in Figures 4 and 5 the same numerals as in Figures 2 and 3 have been used for these and for parts thereof.
  • the selecting actuators 21 can interact also with the second assemblies in the same manner as described above for the knockover sinkers 8 of the first assemblies.
  • Knockover sinkers 8 provided with the right open-work sinker 9 and with the left open-work sinker 10 are alternated with single knockover sinkers 8, i.e. without the right open-work sinker 9 and the left open-work sinker 10.
  • a guiding ring 23 (see Figure 6 ), consisting of one or more parts, is operatively associated to the circular crown 4.
  • the guiding ring 23 is coaxial with the central axis "X-X” and is for instance stationary like the casing, i.e. the circular crown 4 is rotatable with respect to the guiding ring 23 around the central axis "X-X”.
  • the selecting actuators 21 are stationary with respect to the guiding ring 23 and face laterally the circular crown 4 and the circular needlebed, and can be engaged indirectly upon command with the open-work sinkers 9, 10 and with the knockover sinkers 8.
  • the needle-holding cylinder 2 and the circular crown 4 are rotatable around the central axis "X-X" with respect to the yarn feeds and to the selecting actuators 21.
  • the guiding ring 23 develops over and under the circular crown 4 ( Figures 7B - 30B ) and has a plurality of guides extending around the central axis "X-X" and configured for engaging with the above described metal parts of the first assembly and of the second assembly.
  • These guides are for instance grooves delimited by cams.
  • the butt 14 of the knockover sinker 8 of each first assembly and the butt 14 of the knockover sinker 8 of each second assembly engage into a first guide 24 obtained in an upper portion of the guiding ring 23.
  • the first guide 24 is configured for radially moving the knockover sinkers 8 along the respective radial grooves 5 and the respective auxiliary radial grooves 6 when the circular crown 4 rotates with respect to the guiding ring 23 and around the central axis "X-X".
  • the first guide 24 has some portions with a radial width that basically corresponds to the size of the butts 14 of the knockover sinkers 8, alternating with other wider portions. Said larger portions are provided with or define a respective radially outer path and a respective radially inner path (with respect to the central axis "X-X") for said butts 14 and thus for the respective knockover sinkers 8.
  • the first guide 24 defines a first trajectory 25 comprising said radially outer paths for all said wider portions, and a second trajectory 26 comprising radially inner paths for all said wider portions. Two of said wider portions are positioned upstream and downstream from each yarn feed and from each selecting actuator 21.
  • the butts 16 of the right and left open-work sinkers 9, 10 of each first assembly engage into a second guide 27, obtained again in the upper portion of the guiding ring 23.
  • the second guide 27 is located in a radially outer position with respect to the first guide 24, i.e. it surrounds it.
  • the second guide 27 comprises a plurality of paths defining a radially outer trajectory 28 that is basically circular, a radially inner path 29 that is basically circular, and a plurality of connecting portions 30 between the radially outer trajectory 28 and the radially inner trajectory 29 ( Figure 6 ).
  • the third guide 31 extends around the central axis "X-X" and defines a plurality of trajectories.
  • the third guide 31 defines a radially outer trajectory 32 and a plurality of radially inner trajectories 33 placed one after the other around the central axis "X-X".
  • the radially outer trajectory 32 of the third guide 31 is radially further outer with respect to the second guide 27, i.e. it surrounds it.
  • Each of the radially inner trajectories 33 is bow-shaped and has opposed ends connected to the radially outer trajectory 32 of the third guide 31.
  • Each of the radially inner trajectories 33 departs from the radially outer trajectory 32 of the third guide 31 getting near the central axis "X-X”, and then gets away again from the central axis "X-X” then connecting again to the radially outer trajectory 32 of the third guide 31.
  • Said radially inner trajectories 33 are superposed to the second guide 27, i.e. they define a part of the connecting portions 30 of the second guide 27.
  • Said radially inner trajectories 33 are positioned upstream and downstream from each of the four yarn feeds and from each selecting actuator 21.
  • the base portions 18, 18' of all the 12, 12' are housed in a circular track 34 extending around the central axis "X-X" so as to slide therein.
  • the circular track 34 is obtained in a lower portion of the guiding ring 23 and delimits one circular trajectory lying out of the radially outer trajectory 32 of the third guide 31, i.e. it surrounds it.
  • Each of the selecting actuators 21, known per se, is of magnetic or piezoelectric type and comprises a plurality of levers 35 arranged one above the other and movable together between a first position, e.g. a raised position, and a second position, e.g. a lowered position.
  • the levers lie at a distance from the teeth 20, 20' of the selectors 12, 12' so as not to interfere with said teeth 20, 20' when the selectors 12, 12' are in their rest positions.
  • said teeth 20, 20' are positioned between the levers 35.
  • the levers 35 interfere with the teeth 20 of the selectors 12 associated to the open-work sinkers 9, 10 and/or with the teeth 20' of the selectors 12' associated to the knockover sinkers 8 moving in front of the selecting actuator 21 when the circular crown 4 rotates with respect to the guiding ring 23 and around the central axis "X-X", so as to move the selectors 12, 12' from the rest position to the operating position.
  • the guiding ring 23 comprises four movable transfer cams 36 and four stationary auxiliary transfer cams 37 configured for catching and deviating the butts 16 of the open-work sinkers 9, 10.
  • An electronic control unit is operatively connected to the motor or motors causing the rotation of the needle-holding cylinder 2 and of the circular crown 4, to the selecting actuators 21 and to further actuating units, if any, of the machine.
  • the electronic control unit is configured/programmed for commanding the motor or motors and the selecting actuators 21 and said further actuating units, if any, of the machine.
  • the electronic control unit is configured/programmed for selectively moving the levers 35 of the selecting actuators 21 so as to move the selectors 12, 12' singularly from the rest position to the operating position.
  • each of the yarn feeds with the respective yarn feeder 7 is configured for working with a respective group of needles 3 arranged along an arc of circle and with the corresponding open-work sinkers 9, 10 and knockover sinkers 8 and together with the selecting actuator 21 that is laterally offset (at a circumferential distance) e.g. of 90° with respect to said yarn feed.
  • a movable transfer cam 36 and a stationary auxiliary transfer cam 37 work with a respective yarn feed, with a respective selecting actuator 21.
  • Figures 7A-30A show: one yarn feed (yarn feeder 7), the selecting actuator 21 working with said yarn feed and moved of 90° with respect to the yarn feed, the movable transfer cam 36 and the stationary auxiliary transfer cam 37 cooperating with said yarn feed and said selecting actuator 21.
  • Figures 7A-30A further show: the group of needles 3, of knockover sinkers 8 and of open-work sinkers 9, 10 working with said yarn feed (yarn feeder 7) and said selecting actuator 21 and said transfer cams 36, 37.
  • This group of needles 3, knockover sinkers 8 and open-work sinkers 9, 10 extends on about 45°.
  • the selecting actuator 21 can be engaged upon command, indirectly, with each open-work sinker 9, 10 and with each knockover sinker 8 of said group.
  • the group of needles 3 with the respective group of knockover sinkers 8 (of the first and of the second assembly as described above) and with the group of knockover sinkers 9, 10 (of the first assembly as described above) is upstream from the respective selecting actuator 21 with respect to a first counterclockwise direction of rotation ( Figures 7A and 7B ).
  • the needles 3 are in a lowered position ( Figure 7B ) and the open-work sinkers 9, 10 and the knockover sinkers 8 are in the backward position.
  • the needle-holding cylinder 2 and the circular crown 4 begin to rotate in the first counterclockwise direction while the selecting actuator 21 is not actuated, so that the selectors 12, 12' of the open-work sinkers 9, 10 and of the knockover sinkers 8 are not caught by the levers 35 and remain in their rest position.
  • the butts 17, 17' of the pushing units 11, 11' go along the radially outer trajectory 32 of the third guide 31.
  • the butts 16 of the right and left open-work sinkers 9, 10 of each first assembly go along the radially outer trajectory 28 of the second guide 27, and therefore the protrusions 15 of the respective open-work sinkers 9, 10 remain in a position radially at a distance from the central axis "X-X", i.e. in a backward or rest position in which they do not interact with the yarn making the stitch.
  • the butts 14 of the knockover sinkers 8 follow a part of the second trajectory 26 and a part of the first trajectory 25 of the first guide 24 causing a radial movement of said knockover/terry sinkers 8.
  • the knockover sinkers 8 go backward and forward along the respective radial directions while the needles 3 are raised and then lowered so as to make a stitch with the textile yarn fed by the yarn feed while the needle-holding cylinder 2 and the circular crown 4 rotate in the first direction of rotation until they pass over said yarn feed ( Figures 8A, 8B , 9A, 9B , 10A, 10B ).
  • the needle-holding cylinder 2 and the circular crown 4 rotate on an angle of about 180° in the first counterclockwise direction of rotation and form a stitch until they reach the position of Figure 10A , then the direction of rotation of the needle-holding cylinder 2 and of the circular crown 4 is reverted.
  • the needle-holding cylinder 2 and the circular crown 4 thus rotate in a second, clockwise, direction of rotation around the central axis "X-X" while the needles 3 are raised and then lowered so as to make a stitch with the textile yarn fed by the yarn feed in cooperation with the knockover sinkers 8 ( Figures 11A - 14A and 11B - 14B ) until the group of needles 3, the group of knockover sinkers 8 and the group of open-work sinkers 9, 10 are moved again upstream from the respective selecting actuator 21, with respect to the first counterclockwise direction of rotation ( Figures 15A and 15B ).
  • the control unit commands the selecting actuator 21 (by software control) so that it moves a first group of levers 35 from the first to the second position and vice versa, so as to catch only the selectors 12 of the open-work sinkers 9, 10 moving in front of said selecting actuator 21.
  • the selectors 12 caught by the open-work sinkers 9, 10 are moved to the operating position, whereas the selectors 12' of all the knockover sinkers 8 are not caught and remain in their rest position.
  • all or a part of the open-work sinkers 9, 10 of the group are selected by the selecting actuator 21.
  • said selectors 12 push the respective two pushing units 11 towards the central axis "X-X" so that the butts 17 of the pushing units 11 are deviated in the radially inner trajectory 33 of the third guide 31 placed immediately downwards from the selecting actuator 21 and follow it pushing in its turn the first and the second open-work sinker 9, 10.
  • the butts 16 of the first and of the second open-work sinker 9, 10 go along one of the connecting portions 30 of the second guide 27 and get into the radially inner trajectory 29 of the second guide 27 and follow it for a preset angle of rotation described by the circular crown 4 and by the needle-holding cylinder 2 in counterclockwise direction.
  • the first and second open-work sinkers 9, 10 are moved radially towards the central axis "X-X" and towards a respective forward position, while the needles 3 are kept in a lowered position ( Figures 17A, 17B ). Therefore, the pushing units 11, by following the radially inner trajectory 33 of the third guide 31, get back to the radially outer trajectory 32 of said third guide 31 and push the selector 11 back to the rest position.
  • the needle 3 or the two needles 3 operatively associated to the pair of open-work sinkers 9 and 10 are raised and then lowered, if necessary together with other needles 3 to be operated on a given yarn feed without stretching the interstitches, while the needle-holding cylinder 2 and the circular crown 4 rotate in said first direction of rotation and travel on the yarn feed so as to load the textile yarn, fed by said yarn feed, onto the protrusions 15 of the open-work sinkers 9, 10 selected for making elongated interstitches ( Figures 18A, 18B , 19A, 19B , 20A, 20B ).
  • the needle-holding cylinder 2 and the circular crown 4 rotate in the second direction of rotation until the group of needles 3, the group of knockover sinkers 8 and the group of open-work sinkers 9, 10 are moved back upstream from the respective selecting actuator 21 with the needles 3 lowered and the open-work sinkers 9, 10 in the backward position ( Figures 27A and 27B ).
  • the needles 3 therefore do not make any stitch but only contribute to picking and withdrawing the interstitch unloaded from the protrusions 15 inside the heads 3A of the needles 3, so as to then make the open work.
  • the rotation is stopped and reverted again.
  • the selecting actuator 21 is kept in a non-operating position and the needle-holding cylinder 2 and the circular crown 4 are put in rotation in the first counterclockwise direction of rotation on an angle of about 180° ( Figures 28A -30A and 28B - 30B ), keeping the open-work sinkers 9, 10 in the backward position, the needles 3 in the lowered, non-operating position and the yarn feeder 7 in the rest position, so as to reset the operating sequence without making any stitch.
  • the operating cycle can be resumed, with stitch formation, from the position shown in Figures 10A, 10B according to the operating modes as already described above.
  • a double interstitch is made on the protrusions 15 of a right open-work sinker 9 and of a left open-work sinker 10.
  • the double interstitch is made by letting the needles 3 and the open-work sinkers 9, 10 cooperate with a first feed and with a second feed located downstream from the first feed. While the needle-holding cylinder 2 and the circular crown 4 rotate in the first direction of rotation, the textile yarn is loaded onto the protrusions 15 of the selected open-work sinkers 9, 10, the first time on the first yarn feed and the second time on the second yarn feed. Thus, in this step the needle-holding cylinder 2 and the circular crown 4 rotate on an angle above 180°, e.g. above 270°.
  • the needle-holding cylinder 2 and the circular crown 4 revert the direction of rotation and, while they rotate in the second direction of rotation, the two elongated interstitches are unloaded into the heads 3A of the needles 3 on the second feed (i.e. the first feed they meet after inverting the direction of rotation).
  • the double interstitch is made by letting the needles 3 and the open-work sinkers 9, 10 cooperate with one feed.
  • the textile yarn is loaded onto the open-work sinkers 9, 10 on said single feed, while the needle-holding cylinder 2 and the circular crown 4 rotate in the first direction of rotation, and is loaded again onto the same open-work sinkers 9, 10 on the same feed while the needle-holding cylinder 2 and the circular crown 4 rotate in the second direction of rotation.
  • the needle-holding cylinder 2 and the circular crown 4 revert the direction of rotation and, while they still rotate in the first direction of rotation, the two elongated interstitches are unloaded into the heads 3A of the needles 3 still on said single feed.
  • the control unit commands the selecting actuator 21 so that it moves a second group of levers 35 from the first to the second position and then vice versa in programmed angular positions of the needle-holding cylinder 2 and of the circular crown 4, so as to catch specific selectors 12' of the knockover sinkers 8.
  • the selectors of the open-work sinkers 9, 10 are not caught and remain in their rest position.
  • said selector 12' pushes the respective pushing unit 11' towards the central axis "X-X" so that the butt 17' of the pushing unit 11' is deviated in the radially inner trajectory 33 of the third guide 31 placed immediately downwards from the selecting actuator 21 and follows it pushing in its turn radially the respective knockover sinker 8.
  • This radial push is exerted while the knockover sinker 8 is in one of the widest portions of the first guide 24 and moves the knockover sinker 8 from the first trajectory 25 to the second trajectory 26 of the first guide 24, i.e. it anticipates the radial entry of the knockover sinker 8 with respect to the cams only of the first guide 24 when forming a plain stitch as described above.
  • the nose 22 of the knockover sinker 8 cooperates with a pair of needles 3 (in a per se known manner, which is not further described here) so as to form a terry stitch.
  • This operating mode can be implemented while the circular crown 4 rotates in clockwise direction or in counterclockwise direction.
  • the present invention achieves important advantages both from a structural and a functional point of view.
  • the machine according to the invention allows to make open work and/or terry stitches and also other types of motifs with high speeds, thus dramatically reducing manufacturing times for even complex and sophisticated tubular knitted fabrics.

Landscapes

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

Claims (15)

  1. Procédé de fabrication d'un textile tricoté à dessin d'ajourage dans une machine à tricoter circulaire ; la machine à tricoter circulaire comprenant :
    un cylindre de support d'aiguilles (2) et une couronne circulaire (4) ayant un axe central (X-X) commun ;
    une pluralité d'aiguilles (3) installées sur le cylindre de support d'aiguilles (2), mobiles le long de son développement longitudinal et ayant chacune une tête (3A) agencées autour de l'axe central (X-X) afin de définir un lit d'aiguilles circulaire ;
    une pluralité de platines d'abattage (8) installées dans la couronne circulaire (4), mobiles le long des sens radiaux par rapport audit axe central (X-X) et ayant chacune une broche (13) conçue pour coopérer avec les aiguilles (3) afin de fabriquer un textile tricoté ;
    une pluralité de platines de dessin d'ajourage (9, 10) installées dans la couronne circulaire (4), placées à côté des platines d'abattage (8), mobiles le long des sens radiaux par rapport audit axe central (X-X) et ayant chacune une protubérance (15) conçue pour coopérer avec les aiguilles (3) afin de fabriquer un textile tricoté à dessin d'ajourage ;
    au moins une alimentation de fil fonctionnellement associée à un groupe respectif d'aiguilles (3), à un groupe respectif de platines d'abattage (8) et à un groupe respectif de platines de dessin d'ajourage (9, 10) afin d'alimenter au moins un fil textile au lit d'aiguilles circulaire ;
    le cylindre de support d'aiguilles (2) et la couronne circulaire (4) pouvant tourner autour de l'axe central (X-X) par rapport à l'alimentation de fil ;
    le procédé consistant à :
    i. faire tourner le cylindre de support d'aiguilles (2) et la couronne circulaire (4) autour de l'axe central (X-X) et déplaçant radialement les platines de dessin d'ajourage (9, 10) sélectionnées dudit groupe de platines de dessin d'ajourage (9, 10) vers l'axe central (X-X) et vers une position avant respective ; lever et ensuite abaisser les aiguilles (3) dudit groupe d'aiguilles (3) à côté des platines de dessin d'ajourage (9, 10) sélectionnées placées dans la position avant, tandis que le cylindre de support d'aiguilles (2) et la couronne circulaire (4) tournent et passent sur ladite au moins une alimentation de fil afin de charger le fil textile alimenté par ladite alimentation de fil sur les protubérances (15) des platines de dessin d'ajourage (9, 10) sélectionnées afin de fabriquer des points intermédiaires allongés ;
    ii. faire tourner le cylindre de support d'aiguilles (2) et la couronne circulaire (4) autour de l'axe central (X-X) et déplacer radialement les platines de dessin d'ajourage (9, 10) sélectionnées loin de l'axe central (X-X), vers une position arrière respective, lever les aiguilles (3) au moins dans une position de retrait et/ou non chargée, afin de décharger le point intermédiaire sur les protubérances (15) à l'intérieur des têtes (3A) des aiguilles (3), et poursuivre la rotation du cylindre de support d'aiguilles (2) et de la couronne circulaire (4) jusqu'à ce que ladite au moins une alimentation de fil soit passée par-dessus et ensuite abaisser les aiguilles (3) tandis que les platines de dessin d'ajourage (9, 10) sélectionnées se trouvent dans la position arrière respective ;
    le procédé étant caractérisé en ce que l'étape i. est exécutée tandis que le cylindre de support d'aiguilles (2) et la couronne circulaire (4) tournent dans au moins un premier sens de rotation, et l'étape ii. est exécutée tandis que le cylindre de support d'aiguilles (2) et la couronne circulaire (4) tournent dans un second sens de rotation opposé au premier ; ou en ce que l'étape i. est exécutée tandis que le cylindre de support d'aiguilles (2) et la couronne circulaire (4) tournent dans un premier sens de rotation et ensuite dans un second sens de rotation opposé au premier, et l'étape ii. est exécutée tandis que le cylindre de support d'aiguilles (2) et la couronne circulaire (4) tournent dans le premier sens de rotation.
  2. Procédé selon la revendication 1, les platines de dessin d'ajourage (9, 10) sélectionnées étant sélectionnées à l'aide d'un actionneur de sélection (21) faisant face latéralement au lit d'aiguilles circulaire, qui peut être engagé sous une commande, soit directement soit indirectement, avec chacune des platines de dessin d'ajourage (9, 10) dudit groupe respectif de platines de dessin d'ajourage (9, 10) ; ladite au moins une alimentation de fil se trouvant circonférentiellement à une certaine distance de l'actionneur de sélection (21) respectif ; le cylindre de support d'aiguilles (2) et la couronne circulaire (4) pouvant tourner autour de l'axe central (X-X) par rapport à l'actionneur de sélection (21).
  3. Procédé selon la revendication 2, consistant avant l'étape i. :
    à déplacer le groupe d'aiguilles (3), le groupe de platines d'abattage (8) et le groupe de platines de dessin d'ajourage (9, 10) en amont de l'actionneur de sélection (21) respectif par rapport au premier sens de rotation, les platines de dessin d'ajourage (9, 10) se trouvant dans la position arrière et actionnant l'actionneur de sélection (21).
  4. Procédé selon la revendication 1, 2, ou 3, dans l'étape ii., tandis qu'une rotation se poursuit jusqu'à ce que ladite au moins une alimentation de fil soit passée par-dessus, les aiguilles (3) ne prélèvent pas le fil textile de ladite alimentation de fil ou prélèvent un fil supplémentaire afin de fabriquer un point en coopération avec les platines d'abattage (8).
  5. Procédé selon la revendication 1, 2, 3 ou 4, l'étape ii. consistant à :
    déplacer radialement les platines de dessin d'ajourage (9, 10) sélectionnées loin de l'axe central (X-X) dans une position intermédiaire en maintenant les aiguilles (3) dans une position non opérationnelle et/ou dans une position en-dessous de la position de retrait ; lever les aiguilles (3) dans la position de retrait, afin que les protubérances (15) des platines de dessin d'ajourage (9, 10) sélectionnées reposent à côté des têtes (3A) des aiguilles (3) ;
    déplacer radialement en outre les platines de dessin d'ajourage (9, 10) sélectionnées loin de l'axe central (X-X) vers ladite position arrière, afin de décharger les points intermédiaires reposant sur les protubérances (15) dans les têtes (3A) des aiguilles (3) ;
    poursuivre la rotation jusqu'à ce que l'alimentation de fil soit passée par-dessus sans que les aiguilles (3) prélèvent le fil textile de l'alimentation de fil, ou de sorte que les aiguilles (3) atteignent une position non chargée et/ou de retrait et prélèvent un fil supplémentaire de l'alimentation de fil afin de fabriquer un point en coopération avec les platines d'abattage (8) ;
    abaisser les aiguilles (3) tandis que les platines de dessin d'ajourage (9, 10) sélectionnées, après le déchargement du point intermédiaire, se trouvent dans la position arrière.
  6. Procédé selon la revendication 4 ou 5 lorsqu'elle dépend de la revendication 3, un dispositif d'alimentation de fil (7) de ladite alimentation de fil étant déplacé dans une position de repos de sorte que les aiguilles (3) ne prélèvent pas le fil textile de ladite alimentation de fil ; ou le dispositif d'alimentation de fil (7) de ladite alimentation de fil demeurant dans une position de fonctionnement de sorte que les aiguilles (3) prélèvent le fil textile supplémentaire de ladite alimentation de fil, et/ou le cylindre de support d'aiguilles (2) et la couronne circulaire (4) tournant dans le second sens de rotation jusqu'à ce que le groupe d'aiguilles (3), le groupe de platines d'abattage (8) et le groupe de platines de dessin d'ajourage (9, 10) étant déplacés en amont vers l'arrière de l'actionneur de sélection (21) respectif.
  7. Procédé selon la revendication 6, durant les étapes i. et ii., toutes les platines de dessin d'ajourage (9, 10) desdits groupes de platines de dessin d'ajourage (9, 10) étant sélectionnées afin de fabriquer un textile tricoté à dessin d'ajourage, ou uniquement une partie des platines de dessin d'ajourage (9, 10) dudit groupe de platines de dessin d'ajourage (9, 10) étant sélectionnée afin de fabriquer des portions du textile tricoté à dessin d'ajourage,
    et/ou le procédé consistant à :
    maintenir l'actionneur de sélection (21) dans une configuration non fonctionnelle ;
    placer le cylindre de support d'aiguilles (2) et la couronne circulaire (4) en rotation dans le premier sens de rotation afin que chacune des platines de dessin d'ajourage (9, 10) du groupe de platines de dessin d'ajourage (9, 10) demeure dans la position arrière jusqu'à ce que l'alimentation de fil passe par-dessus, et pendant que les platines de dessin d'ajourage (9, 10) demeurent dans la position arrière et que les aiguilles (3) demeurent dans la position abaissée, afin de remettre à zéro la séquence de fonctionnement sans fabriquer de quelconque point.
  8. Procédé selon la revendication 7, consistant à :
    inverser le sens de rotation du cylindre de support d'aiguilles (2) et de la couronne circulaire (4) et à lever et ensuite abaisser les aiguilles (3) afin de fabriquer un point avec le fil textile alimenté par ladite alimentation de fil en coopération avec les platines d'abattage (8) tandis que le cylindre de support d'aiguilles (2) et la couronne circulaire (4) tournent dans le second sens de rotation jusqu'à ce que le groupe d'aiguilles (3), le groupe de platines d'abattage (8) et le groupe de platines de dessin d'ajourage (9, 10) soient déplacés à nouveau en amont de l'actionneur de sélection (21) respectif par rapport au premier sens de rotation.
  9. Procédé selon la revendication 8, consistant à :
    maintenir l'actionneur de sélection (21) dans la configuration non fonctionnelle ;
    placer le cylindre de support d'aiguilles (2) et la couronne circulaire (4) en rotation autour de l'axe central (X-X) et dans le premier sens de rotation tandis que chacune des platines de dessin d'ajourage (9, 10) du groupe de platines de dessin d'ajourage (9, 10) demeure dans la position arrière ;
    lever et ensuite abaisser les aiguilles (3) afin de fabriquer un point avec le fil textile alimenté par ladite alimentation de fil en coopération avec les platines d'abattage (8) tandis que le cylindre de support d'aiguilles (2) et la couronne circulaire (4) tournent dans le premier sens de rotation jusqu'à ce que ladite alimentation de fil passe par-dessus ;
    inverser le sens de rotation du cylindre de support d'aiguilles (2) et de la couronne circulaire (4), lever et ensuite abaisser les aiguilles (3) afin de fabriquer un point avec le fil textile alimenté par ladite alimentation de fil en coopération avec les platines d'abattage (8) tandis que le cylindre de support d'aiguilles (2) et la couronne circulaire (4) tournent dans le second sens de rotation jusqu'à ce que le groupe d'aiguilles (3), le groupe de platines d'abattage (8) et le groupe de platines de dessin d'ajourage (9, 10) soient déplacés à nouveau en amont de l'actionneur de sélection (21) respectif par rapport au premier sens de rotation.
  10. Procédé selon la revendication 5, le déplacement radialement des platines de dessin d'ajourage (9, 10) sélectionnées loin de l'axe central (X-X) dans la position intermédiaire consistant à : déplacer une came de transfert (36) afin de saisir et faire dévier une butée (16) de chaque platine de dessin d'ajourage (9, 10) sélectionnée, et/ou déplacer en outre les platines de dessin d'ajourage (9, 10) sélectionnées tant que ladite position arrière consiste à : déplacer une came de transfert supplémentaire (37) afin de saisir et de faire dévier la butée (16) de chaque platine de dessin d'ajourage (9, 10) sélectionnée.
  11. Procédé selon l'une quelconque des revendications 1 à 10, chacune des platines d'abattage (8) étant placée à côté d'une paire de platines de dessin d'ajourage (9, 10) et chaque paire de platines de dessin d'ajourage (9, 10) contribuant à fabriquer une boucle de point intermédiaire.
  12. Machine à tricoter circulaire, comprenant :
    un cylindre de support d'aiguilles (2) et une couronne circulaire (4) ayant un axe central (X-X) commun ;
    une pluralité d'aiguilles (3) installées sur le cylindre de support d'aiguilles (2), mobiles le long de son développement longitudinal et ayant chacune une tête (3A) agencées autour de l'axe central (X-X) afin de définir un lit d'aiguilles circulaire ;
    une pluralité de platines d'abattage (8) installées dans la couronne circulaire (4), mobiles le long des sens radiaux par rapport audit axe central (X-X) et ayant chacune une broche (13) conçue pour coopérer avec les aiguilles (3) afin de fabriquer un textile tricoté ;
    une pluralité de platines de dessin d'ajourage (9, 10) installées dans la couronne circulaire (4), placées à côté des platines d'abattage (8), mobiles le long des sens radiaux par rapport audit axe central (X-X) et ayant chacune une protubérance (15) conçue pour coopérer avec les aiguilles (3) afin de fabriquer un textile tricoté à dessin d'ajourage ;
    au moins une alimentation de fil fonctionnellement associée à un groupe respectif d'aiguilles (3), à un groupe respectif de platines d'abattage (8) et à un groupe respectif de platines de dessin d'ajourage (9, 10) afin d'alimenter au moins un fil textile au lit d'aiguilles circulaire ;
    le cylindre de support d'aiguilles (2) et la couronne circulaire (4) pouvant tourner autour de l'axe central (X-X) par rapport à l'alimentation de fil ;
    la machine à tricoter circulaire étant conçue pour :
    i. faire tourner le cylindre de support d'aiguilles (2) et la couronne circulaire (4) autour de l'axe central (X-X) avec des platines de dessin d'ajourage (9, 10) sélectionnées dudit groupe de platines de dessin d'ajourage (9, 10) déplacées vers l'axe central (X-X) dans une position avant respective ; lever et ensuite abaisser les aiguilles (3) dudit groupe d'aiguilles (3) à côté des platines de dessin d'ajourage (9, 10) sélectionnées placées dans la position avant, tandis que le cylindre de support d'aiguilles (2) et la couronne circulaire (4) tournent et passent sur ladite au moins une alimentation de fil afin de charger le fil textile alimenté par ladite alimentation de fil sur les protubérances (15) des platines de dessin d'ajourage (9, 10) sélectionnées afin de fabriquer des points intermédiaires allongés ;
    ii. faire tourner le cylindre de support d'aiguilles (2) et la couronne circulaire (4) autour de l'axe central (X-X) et déplacer radialement les platines de dessin d'ajourage (9, 10) sélectionnées loin de l'axe central (X-X) tandis que les aiguilles (3) sont levées au moins dans une position de retrait et/ou non chargée, afin de décharger le point intermédiaire reposant sur les protubérances (15) dans les têtes (3A) des aiguilles (3), et poursuivre la rotation du cylindre de support d'aiguilles (2) et de la couronne circulaire (4) jusqu'à ce que ladite au moins une alimentation de fil soit passée par-dessus et ensuite abaisser les aiguilles (3) tandis que les platines de dessin d'ajourage (9, 10) sélectionnées se trouvent dans la position arrière respective ;
    la machine à tricoter circulaire étant caractérisée en ce que l'étape i. est exécutée tandis que le cylindre de support d'aiguilles (2) et la couronne circulaire (4) tournent dans au moins un premier sens de rotation, et l'étape ii. est exécutée tandis que le cylindre de support d'aiguilles (2) et la couronne circulaire (4) tournent dans un second sens de rotation opposé au premier ; ou en ce que l'étape i. est exécutée tandis que le cylindre de support d'aiguilles (2) et la couronne circulaire (4) tournent dans un premier sens de rotation et ensuite dans un second sens de rotation opposé au premier, et l'étape ii. est exécutée tandis que le cylindre de support d'aiguilles (2) et la couronne circulaire (4) tournent dans le premier sens de rotation.
  13. Machine selon la revendication 12, comprenant au moins un actionneur de sélection (21) faisant face latéralement au lit d'aiguilles circulaire, qui peut être engagé sous une commande, soit directement soit indirectement, avec chacune des platines de dessin d'ajourage (9, 10) dudit groupe respectif de platines de dessin d'ajourage (9, 10) ; ladite au moins une alimentation de fil se trouvant circonférentiellement sous une distance de l'actionneur de sélection (21) respectif; le cylindre de support d'aiguilles (2) et la couronne circulaire (4) pouvant tourner autour de l'axe central (X-X) par rapport à l'actionneur de sélection (21) ; les platines de dessin d'ajourage (9, 10) sélectionnées étant sélectionnées à l'aide dudit actionneur de sélection (21).
  14. Machine selon la revendication 12 ou 13, ladite machine étant conçue pour :
    déplacer radialement les platines de dessin d'ajourage (9, 10) sélectionnées loin de l'axe central (X-X) dans une position intermédiaire en maintenant les aiguilles (3) dans une position non opérationnelle et/ou dans une position en-dessous de la position de retrait ; lever les aiguilles (3) au moins dans la position de retrait, de sorte que les protubérances (15) des platines de dessin d'ajourage (9, 10) sélectionnées reposent à côté des têtes (3A) des aiguilles ;
    déplacer radialement en outre les aiguilles de dessin d'ajourage sélectionnées (9, 10) loin de l'axe central (X-X) aussi loin que ladite position arrière, afin de décharger les points intermédiaires reposant sur les protubérances (15) dans les têtes (3A) des aiguilles (3) ;
    poursuivre une rotation jusqu'à ce que l'alimentation de fil soit passé par-dessus sans que les aiguilles (3) prélèvent le fil textile de l'alimentation de fil ou tandis que les aiguilles (3) atteignent la position non chargée et/ou de retrait et prélever un fil supplémentaire de l'alimentation de fil afin de fabriquer un point en coopération avec les platines d'abattage (8) ;
    abaisser les aiguilles (3) tandis que les platines de dessin d'ajourage (9, 10) sélectionnées, après le déchargement du point intermédiaire, se trouvent dans la position arrière,
    et/ou afin de fabriquer le jour, l'alimentation de fil est décalée de manière angulaire par rapport à l'actionneur de sélection (21) respectif d'un angle de 90° à 180°.
  15. Machine selon la revendication 13 ou 14, le groupe d'aiguilles (3), le groupe de platines d'abattage (8) et le groupe de platines de dessin d'ajourage (9, 10), fonctionnellement associés à une alimentation de fil et à un actionneur de sélection (21), présentent une extension angulaire, par exemple de 180° ou moins, par exemple de 90° ou moins, par exemple de 45°, et/ou la machine comprenant quatre alimentations de fil décalées de manière angulaire l'une par rapport à l'autre, et quatre actionneurs de sélection (21) décalés de manière angulaire l'un par rapport à l'autre, et chaque alimentation de fil, afin de fabriquer le jour, étant décalée de manière angulaire par rapport à l'actionneur de sélection (21) respectif.
EP20718395.5A 2019-04-16 2020-04-10 Métier à tricoter circulaire et méthode de tricotage de tricots à mailles ajourées Active EP3956505B1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
IT102019000005900A IT201900005900A1 (it) 2019-04-16 2019-04-16 Metodo per la realizzazione di tessuto a maglia traforato su una macchina circolare per maglieria
PCT/IB2020/053445 WO2020212818A1 (fr) 2019-04-16 2020-04-10 Procédé de fabrication d'un tissu tricoté ajouré sur une machine à tricoter circulaire

Publications (2)

Publication Number Publication Date
EP3956505A1 EP3956505A1 (fr) 2022-02-23
EP3956505B1 true EP3956505B1 (fr) 2024-05-08

Family

ID=67660622

Family Applications (1)

Application Number Title Priority Date Filing Date
EP20718395.5A Active EP3956505B1 (fr) 2019-04-16 2020-04-10 Métier à tricoter circulaire et méthode de tricotage de tricots à mailles ajourées

Country Status (4)

Country Link
EP (1) EP3956505B1 (fr)
IT (1) IT201900005900A1 (fr)
TW (1) TW202104701A (fr)
WO (1) WO2020212818A1 (fr)

Family Cites Families (10)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB377794A (en) 1931-06-27 1932-08-04 Thomas Goodwin Junior Improvements in or relating to circular knitting-machines
GB410831A (en) 1932-10-24 1934-05-24 Alfred Reymes Cole Improvements in or relating to circular knitting machines
GB449404A (en) 1934-12-24 1936-06-24 Taylor & Co Hucknall Ltd S Improvements in the method of and means for producing knitted fabrics
FR1427471A (fr) * 1965-03-23 1966-02-04 Procédé pour l'exécution de jours dans des tricots obtenus à l'aide de métiers circulaires à bas et dispositif pour la mise en oeuvre de ce procédé
IT997212B (it) * 1973-10-24 1975-12-30 Colosio C Metodo per l esecuzione di tessu to a maglia ad intarsio e trafora to sulle macchine circolari da cal ze e da maglieria e macchina per l attuazione di detto metodo
DE3473308D1 (en) * 1983-12-19 1988-09-15 Watanabe Kutsushita Kogyo Co Jacquard circular knitting machine
IT1314727B1 (it) * 2000-05-10 2003-01-03 Sangiacomo Spa Dispositivo di selezione delle platine per la costruzione di maglia aspugna disegnata su macchine circolari da maglieria e calzetteria
ITMI20030900A1 (it) 2003-05-02 2004-11-03 Santoni & C Spa Macchina circolare per maglieria, particolarmente per la
ITMI20031995A1 (it) * 2003-10-15 2005-04-16 Lonati Spa Dispositivo per la selezione delle platine di abbattitura in una macchina circolare per maglieria, calzetteria o simile
IT201700044770A1 (it) * 2017-04-24 2018-10-24 Santoni & C Spa Macchina circolare per maglieria e metodo di movimentazione di aghi di una macchina circolare per maglieria

Also Published As

Publication number Publication date
TW202104701A (zh) 2021-02-01
IT201900005900A1 (it) 2020-10-16
EP3956505A1 (fr) 2022-02-23
WO2020212818A1 (fr) 2020-10-22
CN111826786A (zh) 2020-10-27

Similar Documents

Publication Publication Date Title
US7207196B2 (en) Circular knitting machine, particularly for producing items of clothing with three-dimensional shapes
EA034361B1 (ru) Кругловязальная машина для вязания чулочных или подобных изделий с устройством для управления платинами
EP3956510B1 (fr) Métier à tricoter circulaire avec sélection de platines et méthodes de fabrication de tricots sur ce métier
EP3956505B1 (fr) Métier à tricoter circulaire et méthode de tricotage de tricots à mailles ajourées
EP1620591B1 (fr) Machine a tricoter circulaire, en particulier du type a diametre moyen, a actionnement d'aiguilles ameliore
EP3956509B1 (fr) Métier à tricoter circulaire pour produire des tricots à mailles ajourées
US12012677B2 (en) Circular knitting machine for manufacturing open-work knitted fabric
US6609395B2 (en) Double-cylinder circular stocking knitting machine with structurally highly simplified cam box
EP3956508B1 (fr) Métier à tricoter circulaire et méthode de tricotage de mailles bouclettes dans un métier à tricoter circulaire
US3426550A (en) Slide latch needle selector arrangement
US20230272566A1 (en) A shaped sinker for knitting machines, in particular for manufacturing open-work knitted fabrics
CN111826786B (zh) 在圆型针织机上制造网孔针织面料的方法
EP0962569A2 (fr) Métier à tricoter circulaire à grand adaptabilité pour bas et similaires avec multiples systèmes ou alimentations
EP4367307A1 (fr) Métier à tricoter circulaire avec sélection de platine et procédé associé de tricotage

Legal Events

Date Code Title Description
STAA Information on the status of an ep patent application or granted ep patent

Free format text: STATUS: UNKNOWN

STAA Information on the status of an ep patent application or granted ep patent

Free format text: STATUS: THE INTERNATIONAL PUBLICATION HAS BEEN MADE

PUAI Public reference made under article 153(3) epc to a published international application that has entered the european phase

Free format text: ORIGINAL CODE: 0009012

STAA Information on the status of an ep patent application or granted ep patent

Free format text: STATUS: REQUEST FOR EXAMINATION WAS MADE

17P Request for examination filed

Effective date: 20211004

AK Designated contracting states

Kind code of ref document: A1

Designated state(s): AL AT BE BG CH CY CZ DE DK EE ES FI FR GB GR HR HU IE IS IT LI LT LU LV MC MK MT NL NO PL PT RO RS SE SI SK SM TR

DAV Request for validation of the european patent (deleted)
P01 Opt-out of the competence of the unified patent court (upc) registered

Effective date: 20230529

GRAP Despatch of communication of intention to grant a patent

Free format text: ORIGINAL CODE: EPIDOSNIGR1

STAA Information on the status of an ep patent application or granted ep patent

Free format text: STATUS: GRANT OF PATENT IS INTENDED

INTG Intention to grant announced

Effective date: 20231204

GRAS Grant fee paid

Free format text: ORIGINAL CODE: EPIDOSNIGR3

GRAA (expected) grant

Free format text: ORIGINAL CODE: 0009210

STAA Information on the status of an ep patent application or granted ep patent

Free format text: STATUS: THE PATENT HAS BEEN GRANTED

AK Designated contracting states

Kind code of ref document: B1

Designated state(s): AL AT BE BG CH CY CZ DE DK EE ES FI FR GB GR HR HU IE IS IT LI LT LU LV MC MK MT NL NO PL PT RO RS SE SI SK SM TR

REG Reference to a national code

Ref country code: GB

Ref legal event code: FG4D

REG Reference to a national code

Ref country code: CH

Ref legal event code: EP

REG Reference to a national code

Ref country code: DE

Ref legal event code: R096

Ref document number: 602020030605

Country of ref document: DE