FR2538416A1 - CONE FOR SPINNING PREPARATION MACHINES, ESPECIALLY FOR CARDS WITH CAPS, EXTENSIONS, PAINTERS AND PEN BENCHES - Google Patents

Abstract

Cone or funnel for spinning preparation machines, more particularly for hat cards, stretchers, combing machines and spindle beds, cone having at least one compression zone, characterized in that the material of the cone 1 is constituted by a mixture of at least one polymer and an inorganic filler with good electrical and thermal conductivity, preferably fine powder of aluminum, copper or other metals. (CF DRAWING IN BOPI)

Description

The present invention relates to a cone or funnel for clamping

  and textile fiber guiding on spinning preparation machines, for example hat cards, stents, combers and pin benches for high speed processing, the cone or funnel then having at least

a level of compression.

  Cones or funnels for prepa-

  spinning ration are known, and made of metal (DE-PS 108 329) and made in the most varied geometrical forms, in order to obtain an equal compression on the cross section The manufacture of these metal cones require an implementation of means considerable technical and technological advantages, in order to obtain a form suitable from the point of view of fluid technology, which is necessary for guiding and compressing textile fibers, more particularly cotton and

  synthetic fibers, at a high processing speed.

  Another disadvantage of metal cones results from

their relatively large mass.

  In a two-stage cone (DE-AS 1 137 982) the final insertion piece, in the direction of advance of the fibers, is made of plastic. Moreover, the manufacture of a wick cone, provided for a drafting bench, made of antistatic plastic, steel

  or brass is known from DE-OS 2,254,957.

  The cones made of plastic have the disadvantage that the resistance to frictional wear is generally lower for polymers than for metals This results in considerable wear at the usual high processing speeds and especially in the field of the most In addition, large amounts of heat result from high friction forces due to high processing speeds, as well as an electrostatic charge of the web or fiber ribbon to be compressed and the cone into

25384 1 6

  polymer. Due to the poor thermal conductivity of the polymer cones, the heat created by the

  friction is poorly evacuated and, in

  at the exit of the cone, a softening and a

  destruction of the surface of the cone polymer occurs

  The high electrical resistance of the plastic material has negative effects because the electrostatic charge due to the friction forces is not removed, which mainly creates

  high processing speeds and for -usina-e

  synthetic fibers, problems in the guiding and compression of fibers The high friction heat, the electrostatic charge of the fibers and cones as well as the escaping air cause in the known cones of plastic irregularities in the fiber ribbon . The object of the invention is to create cones or funnels for guiding and compressing fibers

  -.20 high-speed textiles that are manufactured

  cheaper and with fewer technical implementations that have a longer life and produce compression

  regular ribbon or veil of fibers.

  The object of the invention consists in producing cones which, from the point of view of the fluid technique, make the resistors existing at high fiber processing speeds reduced during compression, which results from the friction of the electrostatic charge, warm-up and air

  escaping during compression of the fiber ribbon.

  The object according to the invention is achieved by the fact that the material of the cone or funnel is constituted

  by a mixture of at least one polymer comprising

  Inorganic materials with good thermal and electrical conductivity, preferably fine powder of aluminum, copper or other metals It is thus possible to simply make cones suitable from the point of view of the fluid technique and to suppress at the same time time the disadvantages known until now plastic cones. The cones made according to the invention have good thermal conductivity and are therefore

  able to regularly evacuate the heat due to friction.

  Thanks to their good electrical conductivity, they eliminate

  the electrostatic charge and thereby reduce the resistances during guiding and compression of the fibers The wear resistance of the cone was furthermore

  increased due to the addition of metal charges.

  In an advantageous embodiment, according to the invention, the material of the cone is composed of a polyamide mixture,

  from 15 to 45% by weight of aluminum powder, a granular

  from 20 to 300 gm and from 3 to 5% by weight of di-

titanium oxide.

  According to one embodiment of the invention, a metal bushing is introduced into the cone at the outlet of the fibers. According to one embodiment of the invention, the cone has at least two compression zones, between which openings are provided. exhaust air.

  In another embodiment, according to the invention,

  The cone consists of at least two separate cones placed one behind the other which are connected to each other while leaving a ring-shaped air outlet opening.

  An embodiment, according to the invention,

  In that the separate cones are connected by an interlocking assembly. Finally, an embodiment of the invention is constituted by the fact that the interlocking assembly of the first separate cone comprises resilient cleats and abutments against which the cone disposed.

  back is pressed by the nose of the cleats that slenclen

  behind a necklace of the cone.

  Various other features of the invention

  from the detailed description which follows.

  One embodiment of the subject of the invention is represented, by way of non-limiting example, in

attached drawing.

  Fig 1 is a section of a cone with a socket

made of metal.

  FIG. 2 is a section of a cone presenting two

compression levels.

  Fig 3 is another sectional representation

of the cone according to fig 2.

  Figure 4 illustrates the section of a cone in two parts. FIG. 5 illustrates another section of the cone according to

fig 4.

  According to FIG. 1, the device for compressing and guiding a web of textile fibers or a fiber ribbon is constituted by a cone or funnel 1 which narrows in the direction of advance of the fibers 2, this cone having a metal sleeve 3 at the fiber outlet 2 In the embodiment, the cone 1 is made of polymer (polyamide-6) and preferably 15 to 45% by weight of fine powder of aluminum fo 'a

  granulometry of 20 to 300 gm and 3 to 5% by weight of

  titanium oxide being further added to the mixture for

  improve the mechanical properties.

  Instead of using fine aluminum powder, it is also possible to use copper powder or other metallic powder. It has been found that by increasing the proportion of fine aluminum powder above 45% by weight in the given particle size, the polyamide matrix is no longer able to bind sufficiently and homogeneously the fine aluminum powder, which increases the

roughness of the surface of the cone 1.

  The metal bushing is made of non-corrosive steel, brass or sintered material and is used in

  the zone of greater wear to increase resistance.

  The cone 3 'for guiding the web according to FIGS. 2 and 3 is constituted by a guide 4 which tapers in the direction of advance of the fibers 2, which guide preferably has two compression levels 5 and 6, between which are arranged air evacuation openings

  7, presenting, for example, the form of slots.

  The cone 1 or 3 'is constituted by a well deformable mixture of polymer, for example polyamide, which makes it possible to achieve a more appropriate conformation from the point of view of the fluid technique and metal powder for the reduction of the electrical resistance. and the increase of the thermal conduction, as well as the increase of the surface hardness An addition of 15 to 45% in weight of fine powder of aluminum of a granulation of 20 to 300 Nom is used For the improvement of the properties mechanical and color, other materials

  may be employed, for example titanium dioxide.

  Copper powder or other metal powders can

  be used in place of the fine aluminum powder.

  The fiber web is brought to the cone 31 and is it

  compressed by the convergence of the compression zones 5 and

  6, the air contained by the veil is then repressed by compres-

  Preferably, most of the air

  the award-winning product is discharged by air evacuation openings 7, along the arrow 8, in order to improve the regularity of the

  compression and get a high speed of pas-

  The fiber web continues to be compressed into a fiber ribbon in the compression zone

6 following.

  Thanks to the choice of materials, more particularly thanks to the metal powder, it is ensured that the electrostatic charge that can occur as a result of the guiding and compression of the fibers 2 because of the friction between the fibers 2 as well as between the fibers 2 and the

  cone 1 or 3 'is prevented by cone 1 or 3' itself.

  According to FIGS. 4 and 5, the cone 9 is constituted by two cones 10 and 11 separated and arranged one behind the other, both of which shrink in the direction of advance of the fibers 2 The cone 11 separated, arranged in second position in the direction of advance of the fibers 2, may also present, in special cases, a bore

  cylindrical instead of the longitudinal hole 13 shown.

  The cones 10, 11 separated are arranged so that there is between them an annular slot having a cross section of regular section or not, slit forming the air evacuation openings 14 The attachment of the second cone 11 to the first cone 10 is

  performed by an interlocking assembly 12 shown.

  The elastic polymer, whose cones 10, 11 are essentially separated, allows the engagement of a collar 15 of the cone 11 behind the nose 16 which are on the lugs 17 of the first cone 10 and the second cone 11 is maintained in its position by the noses 16 and abutments 18 provided on the first cone 11 The cones 10 and 11 (FIG. 4, 5) are made of the same material as the cones 1 and 3 'represented and described

in figs 1 to 3.

  The fiber web is fed to the device and is compressed by the convergence of the first cone 10, the air still contained in the web after the first compression exiting the cone 10 after the release of the web partly by the discharge openings of air 14 which are between the two cones 10 and 11 Thus in the second cone 11, another compression can be made without disturbances occur for example in the form of fiber cluster and irrigularities of the fiber ribbon

leaving this second cone 11.

Claims (6)

  1 cone or funnel for spinning preparation machines, more particularly for hat cards,   extensors, combers and pin benches, cone   at least one compression zone, characterized in that the material of the cone (1, 3 ', 9) is constituted by a mixture of at least one polymer and an inorganic filler   with good electrical and thermal conductivity, preferably   fine powder of aluminum, copper or other metals. 2 cone according to claim 1, characterized   in that the material of the cone (1, 3 ', 9) is constituted by   a polyamide mixture of 15 to 45% by weight of fine aluminum powder with a granulation of 20 to 300 gm and     3 to 5% by weight of titanium dioxide.   3 cone according to one of claims 1 and 2,   characterized in that a metal sleeve (3) is placed   in the cone (1) in the exit zone of the fibers.   4 cone according to one of claims 1 to 3,   characterized in that the cone (3 ') has two or -   several compression zones (5, 6), between which   there are provided exhaust air openings (7).   Cone according to one of Claims 1 to 3,   characterized in that the cone (9) is at least constituted by two cones (10, 11) separated-arranged one behind the other, and are interconnected leaving a free   air evacuation opening (14) in the form of a ring.   Taper according to one of Claims 1 to 3 and   characterized in that the cones (10, 11) separated   are connected by an interlocking assembly (12).   7 cone according to one of claims 1 to 3,   and 6, characterized in that the separate cone (10) has   for the snap-in assembly (12) of an elastic cleat   tick (17) having noses (16) and stops (18) against which the cone arranged behind is pressed   by the nose (16) of the cleats (17) which engage last a collar (15) of the cone.