IMPROVED APPARATUS FOR THE PRODUCTION OF FANCY YARNS

Abstract: An improved apparatus for the production of fancy yarns comprises a first frame (10) holding a plurality of production units (1), each comprisisng a feeding group (15) and/or drafting group of one or more yarns and/or roving; first spinning means (16); rotary means (20) around a vertical axis; located downstream to said first spinning means and acting, in one of two operating conditions of the apparatus, as forming means of a first yarn (101); a rail (22), vertically movable with alternate motion along supports (24) located in the lower part of said first frame (10) and supporting, for each unit (1), a ring (23) for the yarn take-up on a tube (50), associated in a removable way to said rotary means (20), thus permitting, in the second operating condition of the machine, to form a cop (29) of a second yarn (102). A second frame (30) is arranged in front fo said first frame (10), holding, for each production unit (1), a winding groupd (32) for the take-up on cone (31) of first yarn (101).

Description: IMPROVED APPARATUS FOR THE PRODUCTION OF FANCY YARNS DESCRIPTION Technical Field The present invention relates to an improved apparatus for the production of fancy yams Background Art It is known that to produce fancy yams, machines called twisters or spin-twisters are employed These machines are made up of several adjacent production units, each comprising - a yam feeding group and/or a roving drafting group, taken from a reserve, a yam forming group, made up for example of one hollow spindle or two hollow spindles, mounted one above the other, - a delivery group positioned downstream to the yarn forming group, - a take-up group of the final yam on tubes or cones All hitherto known machines with take-up of yam on cones feature, for any production unit, the cone is below the yam forming group and the delivery group, with the axis parallel and horizontal to the machine front side Since the dimensions of the take-up group, in the direction of the machine front side, are larger than those of the other groups, the production units must be adequately spaced out one from the other, thus limiting, in the available space, their total number and consequently machine production capacity Besides the presence of the take-up group makes the machine considerably high and consequently it becomes difficult to operate on the upper groups Finally, it is also uncomfortable to operate on the take-up cones, located in the lower part of the machine As known, a need exists for machines producing fancy yams that suit as much as possible to the different and changeable fashion requirements Particularly, there arises a need for machines that can produce ya s with special effects (for instance yams pioduced with two hollow spindles located one above the other) and taken up on cones, as well as traditional yams (for instance yams produced with one hollow spindle only) and taken up on tubes Disclosure of Invention It is therefore a pnmary object of the present invention to provide an improved apparatus for the production of different types of fancy yams Particularly, it is object of the invention to supply an apparatus structured in such a way as to permit to easily and quickly change yam production, 1 e from ya s with special effects to traditional ones and vice versa It is a further object of the invention to overcome the above mentioned disadvantages, when the yam is taken up on cones Said objects are achieved with an apparatus in accordance with the accompanying claims The technical characteπstics and the advantages of the present invention will become apparent from the following detailed descπption of a not limitative embodiment illustrated in the drawings Brief Descπption of Drawings FIG 1 is a schematic side view of an apparatus in accordance with the invention, with take-up of yam on cone FIG 2 is a schematic side view of an apparatus in accordance with the invention, with take-up of yarn on tube FIG 3 is a schematic view of a hollow spindle arranged for taking up the yam on tube Best Mode for Carrying Out the Invention With reference to FIGS 1 and 2, a production unit 1 of an apparatus for the production of fancy yams, according to the present invention, comprises the following parts supported by a first frame 10 - a reserve of yams 1 1 and/or rovings or slivers 12 on cones or cops 13 and/or bobbins 14, a feeding group and/or draft 15 of the yams and/or rovings, - a first yarn forming group 16 comprising, in the illustrated example, a first hollow spindle 17 provided with a first flanged bobbin 25 of binding yarn 26, - a first delivery group, below the first hollow spindle 17 and comprising a first motorized cylinder 18, - a second ya forming group 19, positioned downstream to the first delivery group and comprising a second hollow spindle 20 provided with a second flanged bobbin 27 of binding yam 28 (FIG 1) or a with a cop 29 for yam take-up (FIG 2) as better described hereinbelow, a second delivery group, below the second hollow spindle 20 and compπsing a second motorized cylinder 21 , a vertically movable ring 23 rail 22, as known in the art, along supports 24, located in the lower part of the frame 10 As shown in FIG 1, in accordance with the invention, a second frame 30 is contemplated in front of the production unit 1 Particularly, said second frame 30 supports, for each production unit 1, a take-up group 32 - known in the art - comprising a cone 31, being its axis horizontally positioned and substantially parallel to the front side of the production unit 1 Each cone 31 is mounted loose on lateral supports 33 and rotates by means of a motorized cylinder 34 peripherally grooved to guide the ya (not shown in the figures) Advantageously, so as to permit the maximum approach of the production units 1, compatibly with the dimensions of the feeding/drafting, yam making and delivery groups, the take-up groups 32 (and therefore the cones 31) are positioned, on frame 30, on two overlapped rows To remove the cones 35 once full, transporting means are contemplated comprising a motorized chain 36 A duct 40, located between the frames 10 and 30 and lying inside a footboard 41, is provided for the pneumatic conveyance of the yam produced to the take-up cones 31 Functioning of the above described apparatus is substantially the following a ya 100 is fed to the first hollow spindle 17 and subsequently to the second hollow spindle 20 Both hollow spindles are kept rotating by tangential belts, not shown in the figures The resulting yam 101 comes out of spindle 20 and is then conveyed via duct 40 to the take-up group 32 and to the cone 31 In this operating condition of the apparatus, the ring 23 rail 22 does not operate and is kept at such a height as not to interfere with the lower hollow spindle 20 Additionally, the apparatus may also be used to produce yams that do not require the second binding yam 28, simply bypassing the second hollow spindle 20 Choosing the present solution it is possible to place the take-up groups 32 at an ideal height from the ground thus making all necessary operations extremely easy In the embodiment, shown m FIG 2, the lower hollow spindle 20 holds, instead of a bobbin with binding yam, a tube 50 Additionally, the rail 22 has an alternate vertical movement, being each ring 23 substantially centered on the vertical axis of spindle 20 This permits to take up the yam 102 coming out of first hollow spindle 17 on a cop 29, quite similarly to the ring spindles system FIG 3 illustrates in details the adaptation means that permit to install a tube 50 (traced with a broken line) on the lower hollow spindle 20 and to obtain the formation of the cop 29 (also traced with a broken line) Said means comprise a lower bushing 52 and an upper bushing 53, both fixed on the shaft 54 of the hollow spindle by means of threaded bolts, not shown in the figures In each bushing 52,53, buttons 55,56 are arranged, displaced by 120° and subject to the action of a spring 57,58, for the engagement of the tube 50 In this way the centeπng of the tube 50 and the correct formation of the cop 29 are assured In this operating condition of the apparatus, the take-up groups 32 on cones 31, previously described, do not operate and, simply removing the second bobbin 27, installing a tube 50 on the lower hollow spindle 20 and constraining the tube on the rotating base of the spindle, the machine with two hollow spindles is converted into a machine with one hollow spindle and one πng spindle Finally, with an apparatus in accordance with the invention, it is possible to produce both yams with special effects (particularly characterized by two binding yams and taken up on cone), and traditional yams (particularly characterized by only one binding yarn and taken up on tube) Additionally, providing each or several production units with independent motorizations, it is possible to use the apparatus to produce simultaneously the different kinds of yarn The invention as disclosed is susceptible to several modification and variations, all of which will come within the scope of the inventive idea. Moreover, all of the details can be replaced by other technically equivalent elements.

Claims: CLAIMS 1 An improved apparatus for the production of fancy yams characterized in that it compπses a first frame (10) supporting a plurality of production units (1), each compπsing - a feeding group (15) and/or drafting group of one or more yams and/or one roving, fi rst spinning means (16), - rotary means (20) around a vertical axis, located downstream to said first spinning means and acting as forming means of a first yam (101), in one of two operating conditions of the apparatus, - a vertically movable rail (22) with alternate motion along supports (24) located in the lower part of said first (10) and supporting, for each unit (1), a πng (23) for the yam take-up on a tube (50), associated in a removable way to said rotary means (20), thus permitting, in the second operating condition of the machine, to form a cop (29) of a second yarn (102), a second frame (30) being provided in front of said first frame (10), supporting, for each production unit (1), a winding group (32) to take-up said first yam (101) on a cone (31 ) 2 An improved apparatus according to claim 1 , characterized in that said first spinning means consist of a hollow spindle (17) supporting a first bobbin (25) of binding yarn (26) 3 An improved apparatus according to claim 1 or 2, characterized in that said rotary means consist of a hollow spindle (20), a second bobbin (27) of binding yam (28) being provided cooperating with said hollow spindle (20) for forming said first yarn (101) 4 An improved apparatus according to one of the previous claims, characterized in that the cones (31) of the take-up groups (32) are positioned, on said second frame (30), on at least two overlapped rows. An improved apparatus according to one of the previous claims, characterized in that a duct (40) is provided for the pneumatic conveyance of said first yam (101) from the production unit (1) to the take-up group (32). An improved apparatus according to one of the previous claims, characterized in that adaptation means are provided to install said tube (50) on said lower hollow spindle (20), said adaptation means comprising a lower bushing (52) and an upper bushing (53) both fixed on the shaft (54) of the hollow spindle by means of threaded bolts, in each bushing (52,53) buttons (55,56) being arranged, displaced by 120° and subject to the action of springs (57,58), for the engagement of the tube (50).

Inventors: GIGLIOTTI GIOVANNI, GIGLIOTTI, GIOVANNI
Applicants: GIGLIOTTI E GUALCHIERI COSTRUZ, GIGLIOTTI GIOVANNI, GIGLIOTTI E GUALCHIERI COSTRUZIONE MACCHINE TESSILI S.P.A., GIGLIOTTI, GIOVANNI
Application year: 2001
Main classification: D02G3
IPC codes: D01H1, D01H7, D02G3