CN1487135A

CN1487135A - Tricot machine

Info

Publication number: CN1487135A
Application number: CNA031540759A
Authority: CN
Inventors: H・-J・赫尼; H·－J·赫尼
Original assignee: Karl Mayer Textilmaschinenfabrik GmbH
Current assignee: Karl Mayer Textilmaschinenfabrik GmbH
Priority date: 2002-08-16
Filing date: 2003-08-15
Publication date: 2004-04-07
Anticipated expiration: 2023-08-15
Also published as: KR100514551B1; TW200407477A; TWI231324B; ES2241452A1; KR20040016387A; ITTO20030637A1; CN1320187C

Abstract

Warp knitting machine having a warping section, a yarn supply section and yarn tension means in which for each yarn is provided a tensioning spring (15) comprising a guiding means (17). Such a warp knitting machine should be operated with a higher speed and enhanced possibilities for patterning. To this end the tensioning spring (15) is made of fiber enforced plastic.

Description

Warp knitting machine

Technical field

The present invention relates to a kind of warp knitting machine, have a disappearing fiber, a yarn feeding area and a thread tension device, this thread tension device is provided with an extension spring that has a feed carrier for every count yarn in yarn feeding area between disappearing fiber and yarn feeding area.

Background technology

Concerning various warp knitting machines, within a certain period of time, the yarn consumption is inequality.According to the motion of knit fabrics, a kind of yarn requirement of fluctuation all can appear in each knitting circulation.But, meanwhile, extract should rotating as far as possible equably of yarn from it out through axle.In order to accept the fluctuation on the yarn requirement, so a yarn leasing device is arranged, this device can be adjusted the path length between yarn feeding area and the disappearing fiber.So just, can compensate the fluctuation on the yarn expense.

Can produce on the warp knitting machine of decorative pattern at those, above-mentioned solution only is suitable under certain condition.Here, no longer be that all yarns all are limited by identical consumption fluctuation.Therefore, no longer can similarly handle all yarns.For each count yarn is provided with self a extension spring that has feed carrier, make that in fact every count yarn all can be handled separately, thus to reach the purpose that prevents the fluctuation on the yarn consumption.The extension spring here designs as the steel leaf spring.If improve the speed of warp knitting machine, this situation can be brought problem.

Used now steel leaf spring, the cross section of its design are 0.60mm ², have low relatively intrinsic frequency, thereby can cause uncontrolled motion.If select to have for example 0.80mm of big cross section ²Leaf spring, intrinsic frequency enough height just then.But because, so can become too high at big stroke yarn under working tension force for this leaf spring of deflection needs a bigger power.Be that uncontrolled motion or excessive yarn tension all may cause producing a kind of not carefully and neatly done appearance of fabrics.

Summary of the invention

Task of the present invention be a kind of can be with the warp knitting machine of handling than high operation speed with jacquard weave possibility.

Above-mentioned task is stated on the class warp knitting machine so at civilian head and solved: extension spring is with a kind of fibre-reinforced plastics forming.

Utilize this fibre-reinforced plastics just can so regulate the performance of extension spring, make it to satisfy needs than warp knitting machine operation under the high operation speed.The intrinsic frequency of extension spring can be selected enough highly.In addition, have a kind of relatively high damping performance with a kind of extension spring of fibre-reinforced plastics manufacturing, this point in extension spring just in case since decorative pattern or material so to produce under the vibration situation be favourable.When constituting extension spring with a kind of fibre-reinforced plastics, people have grasped some additional parameters at hand for the selection of plastics with for fibre-reinforced selection, so that determine the intrinsic frequency and the damping property of extension spring.Certainly the parameter that relates to extension spring specification aspect in addition in addition.

Used plastics preferably have conductive capability.The conductive capability of plastics mainly is to be used for bleeding off electrostatic charge, and this electrostatic charge may form during by feed carrier at yarn, or bring when transporting in company with yarn.Therefore, under a kind of plastics situation of use, also just there is this possibility that bleeds off electrostatic charge.

Desirable in this respect way is: come reinforced plastics with carbon fibre.Carbon fibre has two tasks at this, and the one, it helps the mechanicalness of extension spring to strengthen, and the 2nd, be used as electric conductor to get rid of electric charge.The experiment that the extension spring that the plastics (CFK) that strengthen with carbon fibre are made is done proves: the extension spring made from CFK is suitable for desirable function especially well on the warp knitting machine of the jacquard weave possibility with raising.

Feed carrier is preferably designed as yarn guiding ring, and it links to each other conductively with extension spring.A kind of like this possibility is provided thus, electrostatic charge can be transferred in the extension spring through yarn guiding ring from yarn exactly.Thereby be easy to draining of electrostatic charge.

Desirable especially in this respect way is: yarn guiding ring and extension spring are jointly with a kind of plastics pressure injection-moulded sealing in addition.At this, the main task of plastics is that yarn guiding ring is fixed in the extension spring.So just removed from another kind of fixing means and for example yarn guiding ring being fixed in the extension spring with bonding.Plastics certainly are very thin, so it can or can not influence the mechanical performance of extension spring greatly.Therefore, extension spring can be designed by its specification and used for it material at desirable intrinsic frequency and desirable damping property all the time.

The intrinsic frequency that extension spring has preferably is equivalent to 1.8 times of operating frequency of warp knitting machine at least.If we consider that a kind of operating rate is 1200 rev/mins a knitting machine, this is equivalent to the frequency of a 20Hz so.But, under a kind of rotating bars of the main shaft of a knitting machine, still can produce the friction speed of loop-forming element, thereby aspect yarn movement and yarn extension spring, produce different speed.The operating frequency of warp knitting machine is 20Hz in this example, also only is a basis, determines the intrinsic frequency of extension spring with this.The result that experiment draws is: if the intrinsic frequency of extension spring is equivalent to 1.8 times of the warp knitting machine operating frequency at least, then extension spring just shows satisfactory performance.At least should be 36Hz in this example.

In this desirable way be: extension spring has a kind of like this vibration-damping function, promptly just can realize decaying to less than 10% vibration in its 5 second after being activated to 100% vibration.Yet exist small relatively residue vibration after 5 seconds.That is to say that when extension spring was energized vibration, it can be quite consumingly by vibration damping.In used so far steel extension spring, the residue vibration greater than 30% is arranged usually under the identical situation of other condition.

Extension spring preferably has the storage stroke of 30mm at least.So just can prepare enough yarn reserves, so that under the situation of different yarn consumptions, can realize from the purpose of evenly doffing through axle.Storage stroke even can be bigger is in particular for 40mm.

Wherein desirable way is: the steering force that extension spring is had on this storage stroke is not more than 35cN.In other words, for extension spring on the storage stroke of 30mm at least in addition the required steering force of deflection be no more than 35cN.This steering force is in one, and to have a cross section be 0.6mm ²The order of magnitude of power of steel spring in, but be 0.8mm only for its cross section ²Corresponding elastic force only about half of big of steel spring.That is to say, here the same little steering force of the sufficiently high intrinsic frequency of extension spring has been united.

Preferably portion's section is formed in a plurality of extension springs.On a knitting machine, several thousand extension springs are arranged usually.Therefore, can make manipulation more convenient numerous extension spring composition portion section.

In this desirable especially way be, portion's section has two chelas, and clamping successively between these two chelas has a plurality of extension springs.Portion's section also has a cover joint, and it can realize the replacing of each extension spring.If an extension spring fracture, that is not a whole section defectiveness.We can say that more portion's section just can be repaired as long as take quite little strength.

Extension spring is preferably in being clamped in of it and has an interface in two end regions between the chela.The effect of this interface is: in portion's section, has under a plurality of extension spring situations of arranging successively, can realize certain tolerance compensating, and the unlikely confining force that has influence on each independent extension spring in portion's section negatively.In addition, this interface can also improvement portion section in the maintenance possibility of each extension spring.On the clamping point that carries out the transition between the chela, the danger of extension spring fracture can keep very little.

Interface preferably terminates in the chela.Therefore, extension spring can freely swing, and can not contact with chela on both sides.Monolateral contact allows.Do not take place on beyond this contact is not pulled to when extension spring is worked as much as possible.

Extension spring preferably has a protuberance, and this protuberance is engaged in the depression on the chela.Thereby can improve extension spring and be maintained at fastness in the chela.So confining force just is not limited to pure clamping force.In addition, keep also can realizing a kind of form fit between the chela in extension spring and at least one.

Two chelas preferably have an engagement geometrical configuration of being furnished with at least one protuberance and at least one depression that matches each other.So two chelas not only keep being adjacent to by clamping force each other, but also guarantee to prevent to move relative to each other by form fit.

According to another kind of project organization, portion's section has one and keeps body, and extension spring is cast even mutually with this maintenance body.In this project organization, can use different materials for the maintenance body on the other hand for extension spring on the one hand.

Set by the 3rd replacement scheme: the same matrix of portion's section and a plurality of extension spring form an integral body.For example at first make some plates, its cross section in the matrix scope is greater than its cross section in extension spring scope to be made then.Extension spring just can adopt mechanical means for example to make by sawing like this, then.

Description of drawings

Also in conjunction with the accompanying drawings the present invention is illustrated with reference to some preferred embodiments below.Accompanying drawing is represented:

The partial schematic diagram of Fig. 1 warp knitting machine,

Fig. 2 extension spring-portion's section side view local is represented with sectional drawing,

Fig. 3 extension spring-portion's section plane,

The side view of Fig. 4 extension spring-second form of implementation of portion's section,

The plane of Fig. 5 extension spring shown in Figure 4-portion's section,

The side view of Fig. 6 extension spring-the 3rd form of implementation of portion's section and

Fig. 7 extension spring shown in Figure 6-portion's section plane.

The specific embodiment

The schematically local warp knitting machine of drawing has a knitting workspace 1 among Fig. 1, and by supplying with yarn 2,3 through axle 4,5 to this knitting workspace, and from then on the knitted fabric 6 that is made into is transported in the workspace.Warp knitting machine has the guide bar assembly 7 of a band sley bar pin 8 and the guide bar assembly 9 of a band sley bar pin 10.Between axle 4 and sley bar pin 8, yarn 2 is guided through a fixing guide pipe 11 and a thread tension device 12, and yarn is diverted simultaneously on this tensioner.In a similar manner a guide pipe 13 is being set between axle 5 and sley bar pin 10, this guide pipe is fixed, and a thread tension device 14 is arranged thereafter.Above-mentioned two thread tension devices are constructed identical basically.Therefore only describe thread tension device 12 hereinafter in detail.

Thread tension device 12 all is furnished with an extension spring 15 for each count yarn in the yarn of warp thread piece 2, and wherein all extension springs all are fixed on the pipe 16, and this pipe extends on the width of warp knitting machine.Decide on the warp knitting machine actual conditions, also can be set up in parallel a plurality of pipes, but anchor yarns extension spring thereon.

A yarn guiding ring 17 all has been installed on the tip of each extension spring, with as feed carrier.The yarn of warp thread piece 2 is all by these yarn guiding ring 17 guidings.

Yarn guiding ring 17 all designs and is formed on the yarn guiding ring parts 18.Yarn guiding ring parts 18 usefulness adhering methods are fixed in the extension spring 15.But also have a feasible way, be exactly to be yarn guiding ring parts 18 and common plastic sheath of extension spring 15 configurations, thereby yarn guiding ring parts 18 are remained in the extension spring 15 reliably.

A kind of metal material of yarn guiding ring parts 18 usefulness is made, and also conducts electricity.Connecting portion between yarn guiding ring parts 18 and the extension spring 15 also conducts electricity.

Extension spring 15 is to make with a kind of plastics (CFK) that strengthen with carbon fibre.Extension spring 15 is correspondingly also conducted electricity.

As shown in arrow 19, the yarn guiding ring 17 that is arranged in the extension spring 12,14 may partly experience one section big distance.Extension spring therein 15 can distortion.This distance also is referred to as " storage stroke ", can have the length at the 40mm order of magnitude thus.

Owing to adopt plastics that carbon fibre strengthens making material, so steering force can be kept relative little as extension spring 15.In the cross section of extension spring 15 is 0.96mm ²Situation under, the required steering force of storage stroke that makes yarn guiding ring 17 move through 40mm is approximately 30cN.

The extension spring 15 made from the plastics of carbon fibre enhancing has quite high intrinsic frequency.According to an example, wherein the cross section of 15 tools of extension spring is 0.96mm ², its intrinsic frequency is approximately 41Hz.In addition, extension spring 15 also has sizable inherent damping.When we weigh the decay of a vibration that is encouraged with regard to certain hour, draw be activated to 100% (situation still has 6.5% residue vibration in ± 5 seconds after 4mm) now, in other words, extension spring 15 just failure of oscillations quite apace after excitation.

If we take and state the same steel extension spring of numerical value and compare, just can draw to draw a conclusion: its cross section of steel extension spring is 0.6mm ²The time, the intrinsic frequency that is had is very low, is about 23Hz.After 5 seconds, this extension spring always also has 40% residue vibration.For this reason, the steering force on the tension force stroke is quite little.It in addition be lower than steering force to the extension spring of the plastic production that strengthens with carbon fibre, be about 27cN.If select a kind of for example 0.8mm of big cross section that has for use ²The steel extension spring in cross section, its intrinsic frequency certainly can be higher so, promptly reaches 33Hz.Vibration damping also can be stronger.Just have only 31% residue to vibrate after 5 seconds.But, the steering force on the storage stroke is very high, and it is approximately 60cN.This situation may cause producing too high yarn tension, thereby causes Yarn texturing.

By selecting a kind of plastics that strengthen with carbon fibre to obtain very high intrinsic frequency and very strong vibration-damping function as the material that is used for extension spring 15, the latter causes especially little residue vibration.It is 0.6mm that steering force on the storage stroke roughly is in its used so far cross section ²The order of magnitude of steel extension spring on.

Move fast slightly a kind of knitting machine and be with 1200 rev/mins operating rate work.This is equivalent to a 20Hz frequency.In general, under a kind of rotation situation of the main shaft of a knitting machine, always draw the friction speed of loop-forming element, thereby draw the friction speed of yarn movement, this also can cause the different motion of extension spring 15.Therefore, the frequency of extension spring 15 is not 20Hz, but higher.But, then can obtain gratifying result if the intrinsic frequency of extension spring 15 is arrived surely at least 1.8 times of operating frequency of knitting machine.Under present situation, the intrinsic frequency of extension spring is greater than 2 times of the operating frequency of knitting machine.

On a warp knitting machine, several thousand extension springs 15 are arranged.Therefore following way is favourable: can as shown in Fig. 2 to 7 several extension springs 15 be combined into portion's section.

First of a kind of section kind of structure seen shown in Fig. 2 and 3 like this.

Be clamped between two

chelas

20,21 at the other end of the extension spring 15 that has yarn guiding ring parts 18 on the one end with it.Two chelas the 20, the 21st are joined to one another with a hold-down screw 22.Last chela 20 has a protuberance 23, and this protuberance is engaged to down in the depression 33 on the chela 21.Two

chelas

20,21 just have a kind of form fit each other.Protuberance 23 also is used as the backstop of extension spring 15.

Just can compensate the less tolerance difference that may be present between adjacent two extension springs 15 by an interface 24.Interface 24 can compress on not half.

Interface 24 has two salient points 25, and they are engaged in the boring 26 on the chela 20.This just makes interface 24 couple together with chela 20.

As shown in Figure 3, two

chelas

20,21 have a through hole 27, a screw can be drawn this through hole, and the portion's section shown in Fig. 3 is fixed on the rectangular tube 16.

Press configuration shown in Fig. 2 and 3, its advantage is: replaceable this extension spring 15 when an extension spring 15 fractures.That is to say, will whole section not discard.Only two each and every one

chelas

20,21 need be unclamped each other, defective extension spring 15 replaced just with a new extension spring 15.

Transition region between extension spring 15 and the chela 21 is also conducted electricity, so electrostatic charge can be got rid of, this electrostatic charge is delivered on yarn guiding ring 17 and the yarn guiding ring parts 18 through yarn 2,3.

Figure 4 and 5 are represented a form of implementation of having revised, and wherein identical use identical reference marker with corresponding parts each other.Extension spring 15 has one to keep body 29 at this, and the yarn extension spring 15 of portion's section is plugged in this maintenance body., keep body 29 with extension spring 15 castings together, for example cast with ammonium or lead thereafter.Also can use a kind ofly has the plastics of conductive capability to carry out this cast, thereby can cause a section perforation, that conductive capability is arranged from yarn guiding ring 17 to knitting machine.

Fig. 6 and the 3rd form of implementation of 7 expressions, wherein same parts is used same reference numbers.In order to come into plain view, do not draw the yarn guiding ring 17 on the yarn guiding ring parts 18 among Fig. 6 yet.This yarn guiding ring can be fixed afterwards.Press the structure shown in Fig. 6 and 7, the extension spring 15 of portion's section is shaped from a plate, and in other words, extension spring 15 is to link to each other with a matrix 30 integratedly.As shown in Figure 6, this plate has a thickening part 31 at one end, and this thickening part will form matrix 30 then.Extension spring 15 is to come out from thin position 32 cuttings, for example adopts the hydraulic giant patterning method to carry out cutting.

Claims

1. warp knitting machine, it has a disappearing fiber, a yarn feeding area and the thread tension device between disappearing fiber and yarn feeding area, disposed an extension spring that has feed carrier for every count yarn in yarn feeding area, it is characterized in that: extension spring (15) is made with fibre-reinforced plastics with a kind of.

2. by the described warp knitting machine of claim 1, it is characterized in that: these plastics are to conduct electricity.

3. by claim 1 or 2 described warp knitting machines, it is characterized in that: these plastics strengthen with carbon fibre.

4. by each the described warp knitting machine in the claim 1 to 3, it is characterized in that: this feed carrier is as yarn guiding ring (17) design, and the same extension spring of this yarn guiding ring (15) links to each other conductively.

5. by the described warp knitting machine of claim 4, it is characterized in that: yarn guiding ring parts (18) and extension spring (15) are sealed with a kind of plastic pressure injection moulding jointly.

6. by each the described warp knitting machine in the claim 1 to 5, it is characterized in that: the intrinsic frequency that extension spring (15) is had is equivalent to 1.8 times of operating frequency of warp knitting machine at least.

7. by the described warp knitting machine of claim 6, it is characterized in that: extension spring (15) has a kind of vibration-damping function, and this vibration-damping function is realized decaying to being lower than 10% vibration in 5 seconds after being activated to 100% vibration.

8. by each the described warp knitting machine in the claim 1 to 7, it is characterized in that: extension spring (15) has a storage stroke that is at least 30mm.

9. by the described warp knitting machine of claim 8, it is characterized in that: extension spring (15) has a steering force that is not more than 35cN on the storage stroke.

10. by each the described warp knitting machine in the claim 1 to 9, it is characterized in that: several extension springs (15) are combined into portion's section.

11. by the described warp knitting machine of claim 10, it is characterized in that: this section has two chelas (20,21), several extension springs (15) are clamped between these two chelas side by side.

12. by the described warp knitting machine of claim 11, it is characterized in that: extension spring (15) has an interface (24) in it is clamped in the zone of the end between two chelas (20,21).

13. by the described warp knitting machine of claim 12, it is characterized in that: interface (24) terminates in two chelas (20,21).

14. by each the described warp knitting machine in the claim 11 to 13, it is characterized in that: extension spring (15) has a protuberance (25), this protuberance is engaged in the depression (26) on the chela (20).

15. each the described warp knitting machine by in the claim 11 to 14 is characterized in that: chela (20,21) has a kind of be complementary each other, engagement geometrical configuration of having at least one protuberance (23) and at least one depression (33).

16. by the described warp knitting machine of claim 10, it is characterized in that: this section has one and keeps body (29), and extension spring (15) connects together with this maintenance body casting.

17. by the described warp knitting machine of claim 10, it is characterized in that: this section forms an integral body with a matrix (30) and several extension springs (15).