CN102272364B

CN102272364B - Friction disc

Info

Publication number: CN102272364B
Application number: CN200980153260.XA
Authority: CN
Inventors: G.阿卡克波
Original assignee: Ceramic Technology Co ltd
Current assignee: Ceramic Technology Co ltd; Ceramtec GmbH
Priority date: 2008-11-04
Filing date: 2009-11-03
Publication date: 2015-02-18
Anticipated expiration: 2029-11-03
Also published as: EP2347044B1; DE102009046352A1; EP2347044A1; JP5669743B2; WO2010052213A1; JP2012507642A; CN102272364A

Abstract

Friction discs made from a hard material such as ceramic or metal as a rule generate wear and thus damage the threads more than, for example, soft friction discs made from polyurethane which undergo wear by the threads. Whilst friction discs made of hard material can be used as a rule for more than seven years, friction discs made from polyurethane must be changed after just 8 to 9 months. According to the invention, friction discs (1) thus have at least one friction area reducing groove on the friction surface (4) thereof.

Description

Frictional disk

Technical field

the present invention relates to the frictional disk used in a kind of false-twisting device (Falschdrallvorrichtung) for producing in order to false twisting on continuous print compound (multifilen) fiber especially synthetic fiber, described fiber extends along the rubbing surface of described frictional disk wherein.

Background technology

known, on composite fibre, produce false twisting when producing curling synthetic fiber by friction, described false twisting is fixed on the filament of fiber by heat treatment organizing in district (Texturierzone).Use false-twisting device to produce false twisting under normal circumstances, fiber is along the circumferential surface of the frictional disk rotated wherein, and namely rubbing surface stretches, and frictional disk is overlapped.The rotating speed of frictional disk can up to 14000 U/min.Such false-twisting device is such as known from patent DE 27 08 204 B.

frictional disk can be made up of different materials, wherein, depends on material and the roughness of rubbing surface, and fiber is by the load by varying strength.The frictional disk be made up of as pottery or metal hard material can produce friction under normal circumstances, and therefore requires that fiber wants ratio as harder in the soft frictional disk be made up of polyurethane, and described frictional disk can be worn away by fiber.When the frictional disk be made up of hard material can remain above 7 years under normal conditions, and the frictional disk be made up of polyurethane just must changed after about 8 to September.The frictional disk be made up of hard material also has shortcoming certainly, and namely the surface texture of circumferential surface, rubbing surface increases floating by fibre frictoin and becomes smooth, and this is called polishing effect (Glacing-Effekt).

Summary of the invention

the object of this invention is to provide a kind of frictional disk, described frictional disk is fiber economy (fadenschonend) and the life-span still had as the frictional disk be made up of hard material as the frictional disk be made up of soft material.

this object realizes by characteristic according to claim 1.Favourable implementations of the present invention limits in the dependent claims.

on its rubbing surface, have by frictional disk the groove (Ausnehmung) that at least one reduces rubbing surface, the contact surface of frictional disk and fiber is interrupted and is divided into multiple sections.The friction of whole rubbing surface and danger floating thus, polishing effect will fully be avoided or reduce at least significantly, because the basal edge of the transition part section of the not general for another example the same smooth the upper side and lower side from rubbing surface to frictional disk of situation that rubs is interrupted.Rubbing surface is interrupted by each groove and by forming two new transition part sections so respectively, and by like this, the Disjunct distribution of friction is on multiple position.This is conducive to reducing fibre breakage again significantly.

in a preferred embodiment, groove is guide groove (Nut).Preferably, guide groove is formed around ground on the circumferential surface of frictional disk, and that is, frictional disk has at least one guide groove along the whole circumferential drawing-off of frictional disk.But also can exist multiple around guide groove.In one embodiment, rubbing surface has two guide grooves.This guide groove can become uniform distances ground and arrange each other with the edge of frictional disk.Another pitch arrangement is aimed at according to guide groove number, channel depths and width.Guide groove can be same kind.Guide groove can be unlimited.

according to the frictional disk being provided with guide groove of the present invention, there is the width as traditional frictional disk.But decreased by the face of Filament-wound Machine, i.e. rubbing surface by guide groove.If the width that frictional disk has is such as 9mm, it is 6mm that actual rubbing surface reduces to width in two guide groove situations of 1.5mm, although the winding face of theory still continues as 9mm.For this reason, be particularly suitable for microfilament and high Tissue velocity according to frictional disk of the present invention, described Tissue velocity can reach 1000 m/mins' and Geng Gao.

the cross section of guide groove can be such as V-arrangement, U-shaped or rectangle.The difference of guide groove is arranged, its width or the degree of depth can depend on fiber orientation and fibrous material and designing.

by guide groove, the contact surface of disk and fiber is interrupted and is divided into multiple sections.The friction of whole rubbing surface and danger floating thus, polishing effect, to fully avoid according to the present invention or reduce at least significantly, because the basal edge of the transition part section of the not general for another example the same smooth the upper side and lower side from rubbing surface to frictional disk of situation that rubs is interrupted.Rubbing surface is interrupted by each groove and by forming two new transition part sections so respectively, and by like this, the Disjunct distribution of friction is on multiple position.This is mainly conducive to reducing fibre breakage again.

relative to traditional frictional disk, slide effect (Rutscheffekt) or adhesion loss (Gripverlust) will be reduced significantly by guide groove.

in addition pass through according to frictional disk of the present invention, uniform fiber orientation keeps identical fiber tension to realize, and such as, false twisting in polyamide thread (PA6 78/18 black) and polybutylene terephthalate (PBT) line (PBT 42/24 light) is verified in producing.Fiber tension to be in the front and back according to frictional disk of the present invention as same in the disk situation be made up of polyurethane or about lower level also keeps constant after the long runtime.

number, the channel widths of guide groove can be adjusted to consistent with fibrous material, frictional disk material and frictional disk width with channel depths.

guide groove is conglobate to the transition part section of rubbing surface, and fiber is extended along stubbed seamed edge.

rubbing surface is also suitable for fiber orientation to the chamfering radius of the tabular surface of frictional disk, side.

the surface roughness of rubbing surface is consistent with fibrous material preferably between 0.1 μm and 2.0 μm, is preferably 0.85 μm.

material is preferably oxide ceramics, such as aluminium oxide.

but material also can be metal or plastics.

Accompanying drawing explanation

the present invention is elaborated according to embodiment.Wherein:

fig. 1 shows all direction view according to frictional disk of the present invention;

fig. 2 has illustrated the sectional view of circumferential surface profile in magnification ratio.

Detailed description of the invention

fig. 1 has illustrated the frictional disk 1 according to partial sectional of the present invention in magnification ratio.Diameter 2 is 52mm and width 3 is 9mm.Circumferential surface, namely rubbing surface 4 is conglobate, in the ongoing illustrated embodiment with the radius 5(Fig. 2 being about 6mm).The winding angle determined by this radius makes economic fiber orientation become possibility.In the ongoing illustrated embodiment, frictional disk 1 has two guide grooves 6 on rubbing surface 4.

fig. 2 shows the sectional view of rubbing surface 4 in magnification ratio again.Two guide grooves 6 are same kind and the width 7 had is about 1.5mm, the degree of depth is about 3mm and sidewall 10 is 10 degree to the opening angle 9 of rubbing surface 4.Guide groove 6 centre distance 11 be each other 4mm and guide groove 6 to the centre distance at edge 13 be 2.5mm.As Fig. 2 is visible further, the sidewall 10 of guide groove 6 is conglobate to the transition part section 14 of rubbing surface 4.The radius of transition part section 14 is equal to or less than 0.3mm in preferred implementing form.Here, the radius of transition part section 14 is particularly advantageously made for 0.2mm.

the material of the frictional disk of the present embodiment be greater than 99.7% with purity, density is equal to or greater than 3.92g/cm, permeability is equal to or less than 2%, water imbibition is equal to or less than 0.01%, Vickers hardness (P=2N) is equal to or greater than 22000 N/mm ² , average granular size is equal to or less than 10 μm, average flexural strength is equal to or greater than 320 N/mm ² , compression strength is equal to or greater than 4000N/mm ² 160 N/mm are equal to or greater than with tensile strength ² the aluminium oxide of sintering.The surface roughness Ra of rubbing surface is preferably 0.85 ± 0.2 μm in fiber orientation scope in form of implementation.

other be such as suitable for according to the material of frictional disk of the present invention be oxide ceramics as zirconium dioxide, silica, or nitride ceramics is as silicon nitride or SiAlONe.In the metal material be such as made up of molybdenum-or chromium-nickel-steel, rubbing surface can prevent wearing and tearing by the hard material insert be made up of pottery or diamond.According to theory of the present invention, in the rubbing surface of frictional disk, guide groove is housed, applies in the material of frictional disk in all being suitable for veritably.

the fiber tension measured in the front and back according to frictional disk of the present invention in common rotating speed can change to 30 cN from 5 cN, be starkly lower than traditional frictional disk (but not having guide groove) be made up of identical material upper measure and between 20 cN to 100 cN or larger tension force.This fiber tension T1 can decline 10% to 20% relative to traditional frictional disk before false-twisting device.

almost insensitive according to the frictional disk with two guide grooves of the present invention relative to the change of the ratio of D/Y ratio, dish circumferential speed and silk thread speed.

other changes of guide groove are, described guide groove be zigzag shape (as screw thread) extend on the circumferential surface of frictional disk.The extension of guide groove can be consistent with the direction of rotation of frictional disk or contrary with it.Guide groove can be single pass or multichannel (extending parallel to each other).From axial direction, guide groove open end and end can be stackedly or reciprocally movement.The pitch of guide groove can be less than one turn, one turn or more than one turn.

Claims

1. the frictional disk used in the false-twisting device produced in order to false twisting on continuous print composite fibre, described fiber extends along the rubbing surface of described frictional disk wherein, it is characterized in that, frictional disk (1) has the groove that at least one reduces rubbing surface (4) on its rubbing surface (4), wherein, groove is guide groove (6), wherein, guide groove (6) is formed around ground on the circumferential surface of frictional disk (1), and, described rubbing surface is the circumferential surface of described frictional disk, and wherein, the material of described frictional disk is oxide ceramics.

2. frictional disk according to claim 1, is characterized in that, rubbing surface (4) has two guide grooves (6).

3. frictional disk according to claim 1, is characterized in that, rubbing surface (4) is rounding.

4. frictional disk according to claim 1, is characterized in that, the surface roughness Ra of rubbing surface (4) within the scope of fiber orientation between 0.1 μm and 2.0 μm.

5. frictional disk according to claim 1, is characterized in that, described material is aluminium oxide.

6. frictional disk according to claim 1, is characterized in that, described guide groove zigzag shape ground extends on the circumferential surface of frictional disk.

7. frictional disk according to claim 6, is characterized in that, the extension of guide groove is consistent with the direction of rotation of frictional disk or contrary with it.

8. the frictional disk according to claim 6 or 7, is characterized in that, guide groove is single pass or multichannel.

9. frictional disk according to claim 6, is characterized in that, from axial direction, guide groove open end and end is stackedly or reciprocally movement.

10. frictional disk according to claim 6, is characterized in that, the pitch of guide groove is less than one turn, one turn or more than one turn.

11. frictional disks according to claim 1, is characterized in that, described composite fibre is synthetic fiber.

12. frictional disks according to claim 4, is characterized in that, the surface roughness Ra of rubbing surface (4) is 0.85 μm within the scope of fiber orientation.

13. frictional disks according to claim 6, is characterized in that, described guide groove is screw-type.