DE1785439A1 - Method for lancing a thread through the jet effect of a streaming medium - Google Patents

Description

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N.V, Hachinefabriek L. te Strake, DEURNE, Holland,

Title: "Procedure for by radiation effect" laei Driving medium lancing a thread. "

The present invention relates to a method for by the radiation effect of a flowing Triebaediua · Lanaieren of a thread.

The invention also relates to "in" Device for carrying out this process »·

Such a procedure is particularly important in the textile industry with weaving machines, where a thread is inserted into the lifting shed automatically and quickly

Here you have so far in great scope as Propulsion medium used for lancing a thread. In the In practice, however, there are different XusaaenhSngends

Trouble· .

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For experience teaches “that dependent on the Type of thread of which one thread is easier to take with you in the air lets than the other. It turns out that natural fibers like Cotton can be quite easily caught in the air; Synthetic fibers, on the other hand, which are extremely smooth of their kind, are much more difficult to take from the air while rough fibers again can give rise to other difficulties, though they are lanced by means of air jets. It "turns out" that this phenomenon can essentially be traced back to an impact phenomenon, which depends more on the type of fiber or less associated with friction. It also arises a hatching effect, whereby it can be stated that Synthetic fibers have one thing in common because of their smoothness have a low coefficient of friction. Richer this one Both effects will predominate depends to a large extent on it from how the flu stream is directed in relation to the thread. Most of the time one leaves the instinctual medium as one concentrated Stroke the beam over the thread so that when the thread is in the Candles of the ray found that the mutual relationship between the drive mechanism and the thread would be a pure case of friction. Due to the turbulent effectiveness of the drive medium at the applied arc speeds comes in in practice, nevertheless, the Alfzent is on the impact effect, where the P.eibun ^ s effect is only secondary. In these phenomena, the specific gravity and so on also play a role the relative speed of the medium in terms of the Fadens a roller blind.

Whore. is bein, lifting the lancing speed bestinraeml for the speed with which the weft threads in the shed can be inserted. Ever higher demands are placed on it. In the conventional process, one uses air or water jets with which the Thread blown into the shed of a loom or - is injected »although this is economical a very rapid displacement of the thread is necessary, has the

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Use of air as a driving medium at these high speeds the disadvantage that the air requirement is considerable.

In addition to this, the achievable speed of the air jet is limited by the sluggish action of the air valve and is the performance already required of the compressed air system such that it is recommended for this period for a cheaper medium to see. Any further increase in relative speed became disproportionate bring greater enlargement of the Puiap performance, so that the process would no longer be worthwhile. Furthermore, at such speeds there is a possibility damage to the thread structure and thus premature thread breakage. .

On the other hand, water jets show the tile part with the help of the weft threads driven in this way fabric is quite wet.

The method according to the invention avoids these tile parts in that the thread is only locally heavier power and the drive beam on the heavier part of the Fadens, whereby the instinctual medium as a whole only during a fraction of the time the 'thread displaced over its entire length.

By this measure, the medium gefordex ⁱ th power can be significantly reduced by the instinctual *. An additional advantage is that the thread part, which is made heavier in this way, is more resistant to the mechanical force of the driving medium and the »possibility that the thread structure is disturbed has been reduced ·. In working out this principle, nan can proceed in a number of ways. So it is possible to cause a thickening or other deformation of the thread's own material in the form of a knot, a ball, a loop or a loop * which can be done by hand or mechanically by local heating (with natural fibers by sintering, with synthetic fibers by fusing) , or by external forces

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to be ordered. Likewise, it is a little cup to arrange foreign material on the thread.

However, the aspect of the invention is more practical proposed secondary measure, using aan as a means of To increase the mass of the thread a liquid is used. As such a liquid, of course, water comes first of all into consideration as a cheap raw material, because the water only comes on a limited part of the thread aage ^ BSSf * will be that Tissues are not noticeably humidified as a result. If In addition, the weft threads take a little longer than the width of the cloth

J ' the bristest part of the thread

which protrudes beyond the width of the cloth after you have inserted it, is achieved after this protruding thread end has been cut off φ | or have been severed, despite the fact that the tissue is dry. This difficulty can also be overcome in another way by making the thread heavier locally with the aid of a drop of a volatile substance such as aether instead of a drop of water.

Building on this idea leads to another measure with which the principle of the invention can be realized, namely by saying that “an on the Thread precipitates a condensable or subliaeable agent. "■

This agent may be a liquid obtained by condensation of a vapor or a formed by sublimation of a _Ä vapor or a liquid-solid be, which is absorbed by the thread or is reflected thereon. Examples of such substances are: water, liquid air, iodine, carbon dioxide. The thread acts as a carrier for condensation or absorption cores. It should be! Is that depending on the fiber is rougher * the number of effective '(Condensations- or absorbent cores is large and ^v condensation or absorption easily occurs.

_ä In the foregoing, has always been assumed that air ^ than during the Hruchteils Since effective

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Drive medium works because it has been used for this most of the time. In fact, there is no difference between the invention with regard to the known methods in which an air jet is used for lancing a thread, only in that the air jet is effective during a fraction of the displacement time of the thread and that this thread locally made heavier. In the applications, on which sees the method according to the invention, it comes above all, that the seizure baw. the launch of the Fadens takes place at a very high speed. A further increase in speed can thereby be achieved become »that the hatred of the instinctual medium is increased. As a result of the increase in mass of both the instinctual medium and also of the thread, the impact becomes even more intense proceeding, resulting in a faster dislocation of the thread results. Such a measure would in itself be unsuccessful at the speeds in question, and only too your result will result in damage to the thread structure. It has only meaning in connection with the main measure according to the invention. -

The speed to be imparted to the thread can thus be increased considerably by virtue of the fact that, according to a Another feature of the invention is a medium used as the actual drive medium, which under normal circumstances heavier than air. This medium can be m / vapor, in liquid or in solid form and, if necessary, mixed with air or another inert gas, the Liquid or the solid matter to a mist or manure gets dusty.

The functionality can now be increased even further are thereby given a special measure Invention of the same means as the actual instinctual diura used as one used to increase the mass of the thread. Here, the same means serves not only to understand become that one as a shoot and as a left-enlarging

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Medium used substance in one and the same physical state occurs, but also at the same time in different states of aggregation, in the latter case the instinctual body in the a state of aggregation and the mass flowering agent in occurs in a different physical state of the substance in question. In these fills one can again speak of air or τοη make use of other substances which are lighter than air. Examples of those falling under the terms above binary systems are: water-water, water vapor-water, Air-liquid air, Aetherdarcjf-Aether. This is the case Water-water system prevents the whole fabric from getting wet, one can use the thread, with the exception of the The part that is harder to make, before the water jet that functions as a drive mechanism is directed onto it, a water-repellent one Apply means, e.g. a volatile oil and the like.

In the event that, the instinctual mediua, the same

Time is used to act as a means to enlarge the water, ' does not attach itself or does not attach easily to the thread part in question, one can in addition to the above-mentioned purely physical Processes take refuge in processes in which the attachment between the particles of the instinctual diuras and the thread on chemical, galvanic, electrostatic, magnetic or in any other way. In this way, a single material is sufficient, which both measures the mass of the thread in terms of physical, chemically or electrically enlarged, as well as Drive medium acts *.

If, according to a further feature of the invention, such a binary system is a condensable or sublimable means used in a other than the vapor phase near the thread and afterwards turn into an expansive steam by heating let, you get through the. increased motive pressure a further increase in the speed of the thread. The heating can done by means of hot air or gas or a heated nozzle or with the help of an electric filament or with high frequency

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or by means of a LaSSl beam, among other things, just name a few methods below.

. The expansion held up in this way to take action that heat is extracted from the environment, including the thread so that good condensation or sublimation of the vapor on the fiber is possible. Between the processes that take place almost simultaneously in succession, namely heating, evaporation, expansion, Cooling down, condensation results in a very good energy transfer so that relatively little energy is generated Darfipf liquid systems need to be supplied. . · *

From the above it will be clear that in the various embodiments of the present process water is by far preferable for various reasons for other liquids or condensable or sublimable agents because of its cheapness, its tremendous expansion ratio and a capability distinguished by fibers of the various ways of being absorbed. However, certain fibers, * the so-called hydrophobic fibers, absorb the water to a lesser extent and in that case other substances or media come into consideration, depending on the factors already mentioned, namely the coefficient of friction (roughness) of the fiber, density of the medium, relative Speed of the Hediuus with respect to the thread. ■■ '. ■'

In a practical implementation, water is used as the actual drive medium under high fracture dusty and the jet is short-lived so that it is only a small part of the thread to be lanced meets. Although the use of mass as a drive medium here already causes an increase in the mass of the instinctual medium, also finds absorption of water droplets in the fade instead of using the fibers as absorption cores, so that the Mass of the thread is locally enlarged. These effects influence each other and ensure an intensification

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the impact and friction phenomena.

The big advantage of using τ · η knife instead of air, should appear from the practice below, extracted data:

Lancing speed drive medium the thread power

Air 30 ln / sec. H PS pump Water 80 ra / sec. TOO W.

In another practical implementation, water is suddenly converted into steam »sodaea a very expansive drive medium is achieved, the extent of which is greater than air is. Because this Daepf directed towards the When fibers acting as condensation nuclei condense, the hatred of the thread is locally enlarged and hits Here, too, there are two effects that reinforce each other.

As a rule, a single drop is enough

to evaporate, the volume of which increases 1000-fcch as a result so that a super-fast lancing of the thread is possible is, while the thread moistened after condensation can be appropriately crimped or, conversely, smoothed.

In addition to the above-mentioned Maasnahraen, which the The method according to the invention also intends to increase the mass of the thread or the drive medium a number of measures related to the support of the thread during its transport through the Drive medium.

In a conventional process, air is used for this, but not in combination with a thread, whose mass has been locally increased.

In the method according to the invention, this is Combination, on the other hand, is probably applied in that there is another medium present besides the instinctual medium that is responsible for it the thread is intended to be transported in a load-bearing manner and

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at most during the rest of the shifting string of the thread is effective. Suitable transport media are air, H * a # «rdatnpf or water, whereby in the latter case «again gas» rgt., should be that the larger part of the thread wa *** reproof has been made.

According to another Merkiaal, nn «borrowed here Proceed appropriately, by the fact that one as Triebaedlum the same medium ends with which the thread is trimmed.

A device for carrying out the method according to the invention zuir. through the radiation effect of a flowing Trieir.nediuns lance a thread provided with a nozzle is characterized by a space that is large enough Contains smock and has a passage for the lead the mass-increasing agent to a part of the accentuated thread, in-which agents are present around the Niaso-enlarging agents only for a short period of time inject on the thread.

The device is further characterized in that the passage forms part of the nozzle. In the era trap the breed-enlarging agent serves as the instinctual medium at the same time. ·

Furthermore, the device can be used Invention the nozzle can be provided with an additional nozzle, one of which is used to dispense the propellant medium and the other to dispense the mass-increasing agent.

The means for knocking down the mass-increasing Means can be galvanic, electrostatic, magnetic or of any other kind.

In a special version, the mass enlarging end Means are applied to the thread by mechanical means. The device is further marked by means for heating a volatile substance serving as a propellant medium.

The new procedure after the discovery becomes more detailed explained with reference to the drawing in which the

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Hguren 1-5 schematize!) Represent a thread old that in accompanying medium, being a gasf5r * igoe Moditia «it Stripe lines and a liquid medium ait fully soaked Lines is shown. There are:

Figs. 1 and 2 illustrate conventional methods;

3-5 a representation of the ancestor after of the invention;

6 shows a device for carrying out the method according to the invention.

In Fig. 1, a thread 1 is drawn, which is driven by a water jet completely unhfillendon the thread, indicated by solid lines 2. In this known method, the entire thread is wet and is used by the / 'dasser not only to increase the hatred of the thread, so that Damage to the thread structure under the influence of the force of the water jet is avoided, but at the same time as Drive medium and transport mediura.

FIG. 2 serves as an explanation of another previously customary method. The thread 1 is here given by ν 51 Hg one indicated by dashed lines 3, gaseous Ilediuir. under pressure, took air as the instinct and at the same time serves as a supporting transport medium. In this case, however, there is no question of an aggravation of hatred neither of the thread nor of the medium.

In Fig. 3-5, which illustrate the method according to the invention, the local cup enlargement of the thread is schematically indicated by a line segment H. A liquid jet 2 of short duration is used as the driving medium. 3 also shows a gas-free, carrying transport medium under pressure 3, while in FIG Gaseous medium 7 changes into a gaseous medium S. One such

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Load-bearing transport medium under pressure is absent at all * * »d gas in

Fig. 5. ■

FIG. 6 shows a device with which the inventive method is to be carried out. The thread T is located in a cavity 11 of a core 12 of a DQsO ₁ generally indicated with reference numeral 10, which is slidably mounted in a fixed housing 13, the mouth 14 of which ends at the sleeve 15 of the core 12. Between the mouth 11 and the mouth VS there is a Rin ^ karnmer 16, which narrows towards the front to form a fissure 17. The ring chamber 16 contains the drive medium, which is excluded under pressure through the annular gap 17 for a short period of time before the carburization 11. Which the φ

Annular surfaces 18, 19 defining annular gaps 17 are of this type inclined that a directed Trieestrahl at the Ringspdta 17 occurs, which the thread 1 in a very limited place 20 hits, so that the mass of the thread locally increases will. The substance in the annular chamber 16 thus serves as a driving medium and at the same time as a race-enlarging agent Means for the thread. .

When the pressure in the ring cararaer 16 is normal,

the ring gap 17 is closed. Through one into the annular chamber Circling end. Bore 21 can be exerted on the liquid in the annular chamber 16 such a pressure that the core 12, with Referring to the drawing, shifts to the left against the ^

Effect of a spring 22. This spring is in the axial sense ™

enclosed between an annular collar 23 arranged on the outer circumference of the core and one with outer Threaded sleeve 24 through which the core 12 push can. The sleeve 24 is internally threaded End 25 of housing 13 screwed. As soon as the core 12 after shifts to the left, the spring 21 becomes more tensioned exposed to what tension after the pressure on the liquid in the annular chamber 16 is lifted again, one goes certain delay is transmitted to the collar 23 so that

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this is driven back to the right again «ad at the same time pushes the core 12 back to the right, whereby the ring gap 17 is completed again.

If necessary, you can start at the end of the At the mouth 15 of the core 12 there is an output spiral 26 be arranged so that the liquid in the Ringkameer 16 can be sprayed out as steam, and that · instinct fluid as an expansive steam can escape through the annular gap 17 so that part of this steam condenses on the thread or sublimated to increase its mass, is to the On the fader side of the housing 13, a cap 27 with a mixing tube 27a arranged, the axial bore 28 on the same Long axis of the cavity 11 in the core 12 is located. By a pipe 29, a cooling gas can enter the bore 26 of the mixing tube 27a, so that the expansive steam on the Thread can be reflected. A special effect here is the formation of a gas jacket around the bundle of steam so that this can conveniently condense or sublime around the thread and notably can not be reflected on the wall of the bore 28.

Through the opening at the rear end of the H sleeve 11 can use air as a transport medium. step in. To the holes 21 and 29 lines can be connected if necessary, which are connected to a control device to determine the duration of injection or cooling. Instead of a spring can the reciprocating movement of the core 12 and thus the opening and closing of the annular gaps 17 of a cam mechanism are effected for its coupling with the kernel an Auaspahrünjr, 30 provided on the kernel 12 has been.

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Claims (1)

Α__ NS PRU E CH E 1. Procedure for the radiation effect «la ·· flowing instinctual medium Lanzisren dines thread »thereby marked that the thread is only locally heavier power and the drive jet on the harder part of the Fadens, whereby aian is the instinctual medium ale ganse only to be effective for a fraction of the time reads »in the the thread shifts over its entire length 2. The method according to claim 1, characterized that one as a means of increasing the mass of the thread uses a liquid. 3. The method according to claim 1, characterized in that that on the thread there is a conaensable or sublimable one Means precipitating. 4. The method according to any one of claims 1-3, characterized characterized in that, according to a further feature of the invention, a medium is used as the actual propulsion medium, which is heavier than air under normal circumstances 5. The method according to any one of claims 1-3, characterized in that the same as the actual driving medium Means used like one used to increase the hatred of the thread. 6. The method according to claim 5, characterized in that such a binary system is a condensable or sublimable agent used in another as the vapor phase brings it close to the thread and afterwards let go into an expansive steam by heating. 7. The method according to any one of claims 1-6, characterized in that characterized that besides the instinctual medium there is another Medium is available that is intended to transport the thread in a load-bearing manner and at most during the rest of the thread Displacement time of the thread is effective. 109887/0648 ■ _{BAD 0RialNAL} -IH- θ. Method according to Claim 7, characterized that the same Hediue is used as the instinctual medium with which the Thread is driven. . 9. A device for performing the «method according to any one of claims 1-8, sum by a beam effect streaming medium lancing a thread provided with a nozzle., characterized by a roughness »that the mass-increasing agent after a part of the projected thread, by having means around the mass enlarging means to be injected onto the thread only for a short period of time. 10. The device according to claim 9 j, characterized in that the passage forms part of the nozzle. 11. The device according to claim 9, characterized in that the nozzle is provided with an additional seat Nozzle, one serving to dispense the propulsion medium and the other to dispense the mass-increasing agent. 12. Device according to one of claims 9-11, characterized in that the means for depositing the mass-increasing means galvanic, electrostatic magnetic or of any other kind. 13. The device according to claim 9, characterized in that the mass-increasing agent on mechanical Ways to be attached to the thread. IH. Device according to one of claims 9-13, characterized by means for heating a volatile substance serving as a propellant medium. BATH ORIGINAL 109887/0645