DE2353884A1 - TUFTING MACHINE AND TUFTING PROCESS - Google Patents

Description

Tufting machine and tufting machine

The invention / relates to the tufting of blankets and carpets and the like and relates to a machine and a method for producing dense tufted piles, as well as a device for changing the thread color during each tufting cycle, for producing tufted products with relatively greater pile density and complicated and beautiful patterns that can be programmed by a selected pattern, whereby the yarn is pneumatically transported. ■ _;

From US-PS 27 165 a device for transporting yarn strands and pieces of yarn by means of pneumatic pressure and for threading the same into a device for applying Known pieces of yarn, which tufts the pieces of yarn into a base fabric. The color of the yarn can be selected for each tuft stroke, and by means of a magazine that gradually moves sideways to a series of fermentation tubes that are used to feed the yarn to the Device for applying the pieces of yarn are used. To this The color can be selected for each of the yarn guide tubes.

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Also according to US Pat. No. 3,554,147, the choice of color is given in The yarn is pneumatically transported with each tuft stroke. Pure every needle station a number of yarn cones are accessible, of which differently colored yarn is selected and transported through channels which lead into a common channel arranged in the vicinity of the needle station. In one exemplary embodiment, the yarn cutting device is placed adjacent to the station and the yarn pieces can be placed before, during or after threading into the element for attaching the pieces and before or during tufting. According to a preferred embodiment, a pneumatic System used, with a pneumatic chamber enclosing the charging station. According to the invention, however, the pneumatic Pressure or air pressure to support the direct threading applied into the elements for attaching the pieces.

From U.S. Patents 3,216,387, 3,217,675 and 3,386,403 it is known to place the yarn pneumatically in hollow needles. No hollow needles are used in accordance with the invention. Furthermore, it is not possible with the known gate directions, the yarn to change with each tuff stroke.

While in the aforementioned known devices when removing the yarn from the hollow needles, conventional tufted or needle-pile loop makers are used it is known from US-PS 3,389,667, which is still in the hollow, tubular To cut the thread on the needle. However, once the thread is inserted into the needle, it cannot be pulled out so that the choice of multiple colors is not possible.

According to US Pat. No. 2,987,019, the tufted nubs are not passed through a basic product, but by means of a binding pulled down thread onto the upper surface of the base fabric. The needles are not used for tufting, but rather guide the binding thread,

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which runs from the needle to the greenery in such a way that the tufted yarn runs through the space between the needle and the thread. the The needle pulls the binding thread back through the base fabric so that it holds the tufted yarn on the upper surface of the base fabric. The tufted yarn is then cut to make the hops.

IrL of US Pat. No. 3,393,653 is also a method of choice multiple colors "described, with a mechanical gripper through passes through the eye of a forked needle, mechanically grips a selected strand of yarn and pulls it into the eye of the needle. To this Time, the strand is released from the gripper and then from the supply separated and tufted. No pneumatic pressure is used here. The device therefore "works relatively slowly.

The invention is based on the object of a method and to provide an apparatus for tufting in which the color is selected for each tufting cycle at a high rate of production can be. For this purpose, the yarn should be fed directly into the facility Applying the pieces of yarn are threaded, by using of auxiliary guidance devices. Subject of the invention is also a tufting machine in which the tufting yarn in the feed and the threading system is partly forcibly controlled in a pneumatic manner. Parts of the two strands of yarn are in the same Eye of a needle inserted, a strand preferably consisting of the thread that starts from a previous knob. object According to the invention, it is also a tufting process in which a yarn bundle threaded through the eye of a needle, followed by the loop cut and the ends of the same, i.e. the cut yarn loop, inserted or "planted" into the base material •will. The invention also relates to a tufting process, in which double yarn strands are threaded through the eye of a needle of a tufting machine, so that the game is more varied Dye simultaneously tufted and the color during a tuft cycle Can be changed by changing the color of a through the eye of the Needle running strand is changed.

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ORIGINAL INSPECTED

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The tufting machine according to the invention contains a number of threads that are arranged across the width of the machine and on connected to a fade bar in a conventional manner. Pure The G-thread color can be selected continuously for each needle, the color being selected by color scanning. The choice of thread can be made by means of the yarn feed and metering device described in U.S. Patent 3,554,147 to get voted. In the following, the term "overpressure" is used, but a negative pressure or a Positive and negative pressure can be used to transport the yarn to the tufting station. When a particular yarn is selected and from the yarn metering device is released, it is pneumatically transported into a threading tube that is placed on the eye of the corresponding Needle is aligned. The threading tube is through the eye of the needle movable, so that the needle is threaded, which here if necessary punctures the base material. During the first tufting stroke for a new row of thread, the needle can be used after using the thread of the threading tube was passed through the eye of the needle through which Base goods are withdrawn, pulling the end of the strand of yarn through the base material and releasing it, so that a yarn knob can pass through the base material with one end (cut piece of yarn). The needle then pierces to receive the next piece of yarn, the basic fabric in the next position.

After one end of the yarn is inserted into the base fabric is, the threading tube supports the supply of the following Thread through the needle in such a way that a loop is formed so that a double section passes through the eye, and one from the threading tube and the other from the basic goods. The needle can then be withdrawn through the base fabric, whereby she pulls the thread threaded into her eye through the base fabric. In this way, two ends of the yarn or in a single stroke a loop of thread pulled through the base fabric and run through a puncture hole. The! Rebuke is withdrawn so far that the tufted yarn is released and the needle can then pierce the basic fabric for the next stroke.

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The invention is described below with reference to the drawing

explained in more detail. Show it:

Pig. 1 'shows the schematic overall view of a tufted mauve;

Figure 2 is a schematic representation of the drive mechanism for the needle bar and the threading tube;

Pig. 3 sectional views of the working area of the ^1S tufting machine. when carrying out successive work steps, namely when tufting the first thread of a row of thread; in detail:

Pig. 3 the yarn in the threading tube; _: =

Pig. 4 the threading tube that has penetrated the eye of the needle;

Pig. 5 the retracted threading tube and the one in the eye of the needle remaining yarn;

Pig. 6 the needle · during retraction, which pulls the strand of yarn through the base fabric;

Fig. 7 - the detachment of the yarn from the needle;

8 shows the needle penetrating the basic product in a new position; ...- ■: -

Fig. 9 shows the needle in the loading position for the start of the next Cycle;;

Fig. 10 sectional images of the working area of the machine during different work steps in the second and subsequent cycle after during the first cycle a single strand of twine has been used, namely:

10 shows the threading tube leading the strand of yarn into the eye of the needle;

11 shows the severing of the yarn strand by the knife when the threading tube is at the end of its forward movement; ; _:

12 shows the retraction of the threading tube;

13 shows the threading tube in its retracted position, with two strands of yarn remain in the eye of the needle;

14 shows the retraction of the needle through the basic fabric;

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Pig. 1 5 the tufted strands after loosening them from the needle;

Pig. 16 the penetrating into the basic goods in a new position Needle;

Pig. 17 the needle in the loading position to start the next Cycle;

Pig. 18 a sample of one with a needle punch machine according to the invention manufactured product;

Pig. 19 is a cross-section of the working area of the machine when threading a loop into the eye of the needle for loop pile tufting;

Pig. 20 is a cross-section where the pig. 19 following Working step when tufting a tuft of loop pile;

Pig. 21 the perspective view of a threading tube, one end of which is provided with a cut notch;

22 shows the cross section of a needle station, with the feed tube arranged adjacent to the needle and pressed a loop of thread from the feed tube into the eye of the needle will; and

Fig. 23 shows a pig. 22 similar cross-section after the loop of yarn is completely threaded into the eye of the needle.

The one in Pig. 1 machine shown schematically contains a slip-on gate 10 with five coils 1OR, 1OW, 1OB, 1OG and 1ΘΤ, from which red, white, blue, green and yellow yarn R, ¥, B, G and T, respectively, are fed to the machine. Instead of five spools of thread, any other number can also be chosen. From the Garnkenen of the slip-on creel 10, the yarn strands R, W, B, -G- and T deducted by means of a metering device 12, which is preferably several brakes 12A, 12B and 12C and yarn take-off devices 1 2X and 12T. The yarn metering device 12 essentially operates such as that described in U.S. Patent 3,554,147. With the help of Yarn metering device 12 is a loading station 20 for a Tufthub fed the necessary yarn length. The excess while

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Yarn not used during the tufting cycle can be taken from the loading station withdrawn - to change the color before the next stroke.

According to FIG. 1, the yarn runs from the metering device 12 through yarn guides 11 to tubes 16 which protrude into a box 30 supplying the compressed air and, if necessary, into Venturi nozzles 32. From the Venturi nozzles 32, pipes 34 run ^{to the} threading device 17, which can be moved back and forth by means of a carrier 70. The actual threading tube 18 protrudes through the eye 24 of a single needle 22. The exit ends 35 of the tube 34 are separated from one another by means of partitions 19, which can be made of sheet metal or plastic and serve to guide the yarn strands to the threading tube 18. In particular, they prevent entanglement of the yarn ends. According to FIG. 1, the partition walls 19 are attached to the rear wall 21 of the threading device 17. The needle 22 can be referred to as a device for attaching pieces of thread. It is connected to a needle bar 23 which runs the width of the machine. The base material B runs from a supply roll 27 to a free-running roll 28 and a drive roll 29. It is held by means of a support 14 which protrudes from the frame 15 in the vicinity of the needle 22. The base material B also rests on comb-like parts 13 which protrude from the support 14 and protrude through the spaces between the needles 22;

Adjacent to the threading tube 18 is when this is in its innermost or front position, a cutting mechanism 40. The yarn strands are cut off at this point ^ after they have been threaded through the needle 22.

If a yarn block is moved to the position of the brake 12C

releases, the additional yarn is moved by the pressure in the box 30 through the tubes 16 and 34 i through the threading device 12 and into the threading tube 18. The Venturi nozzles 32 can be used to support the yarn withdrawal from the timing device 12.

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INSPECTED

Pig. Figure 2 schematically shows the drive mechanism for driving the main components of the air machine. The needle bar 23 is one at the foot 22. Push rod 50 attached. The push rod 50 is in the push rod housing 54 by means of an axle pin 58 a pivot joint 56 is connected. The pivot joint 56 is in turn by means of an axle pin 62 with the Uadel pivot arm 60 tied together. The pivot arm 60 is driven by a cam driven pivot shaft 64.

The threading device 17 is on the yarn feed carrier 70 attached, which is driven by a joint 72 in the lateral direction. The joint 72 is connected by means of an axle pin 74 the yarn feed carrier and connected to a yarn feed pivot arm 76 by means of an axle pin 78. The pivot arm 76 is of an optionally cam-driven pivot shaft 80 is driven.

The entire device can have a suitable transmission, not shown, and corresponding waves and connections driven by a single motor (see U.S. Patent 3,554,147). This includes the yarn feed swivel shaft. 80 that fiadel pivot shaft 64, the basic goods drive roller 29 (Fig. 1), the mechanism not shown for the cutter 40, the mechanism not shown for generating pulses for Determination of the pattern and the yarn metering device 12.

In. the 3fig. 3 to 17 are consecutive The steps involved in threading the yarn and tufting are shown. Pig. 3 to 10 show a sequence of operations, while the first Strand of yarn from a series of several strands of yarn is used in base fabric B. At the beginning of the cycle is located according to Pig. 3 a certain strand of yarn in the threading tube 18. The movement of the threading tube has not yet started, the basic goods are lying quiet. In Pig. 4, the threading tube 18 moves forward while the yarn metering device 12 releases yarn. The airflow under-

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ORIGINAL INSPECTED

supports the "advancing of the yarn together with the tube 18. In FIG. 4 the threading tube 18 is in its front position, the thread being threaded into the eye of the needle 24. While air continues to be supplied, the moves according to FIG Threading tube 18 back through the eye of the needle 24 .-- The strand of yarn is held in the front position in which it runs through the eye of the needle 24. Fig. 6 shows the needle at the beginning of its downward movement when the first end of the yarn is inserted into the basic fabric B. In 7 the needle 22 is at the lowest point of its stroke. The end of the yarn is completely inserted into the base fabric B and has detached itself from the needle eye 24. At this moment, the base fabric B can be moved to the next position, in the next position Tufting cycle, the next row of tufts is tufted. '_;

In FIG. 8, the basic fabric B has moved one step forward and the needle 22 penetrates the basic fabric and moves it up to its loading position. Above the basic goods B and adjacent to the. "Tufting station is a bracket 97 »which is pivotable and presses against the last finished tuft to prevent it from passing through the threading tube 18 is pulled out of the ground when it is the thread threads into the needle 22 for the next Tüfthub..The clamp 27 can be pivoted or slidable. In Fig. 9 is the needle 22 in its loading position. She is ready to start the second tufting cycle. At the end of this first cycle there was only one:. only thread end inserted into the base fabric. The bracket 27 is located in Fig. 9 in their clamping position. During the following Two yarn ends are used in each cycle, even if a different color is selected during the cycle will.

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10 "to 17 show the sequence of operations in the second and all subsequent tufting cycles. After a thread end is inserted (Fig. 9), and the needle 22 has returned to its loading position 10, the next cycle begins. The threading tube 18 moves forward and pushes the yarn, which is up to to the front end of the tube 18 is sufficient. The thread feed is pneumatically assisted.

In this way the loop of yarn is formed, with both strands forming the loop running through the eye of the needle 24. One end was inserted into the basic fabric B in the last cycle, while the other end is still connected to the yarn supply, that is to say to one of the five yarn cones of the creel (Fig. 1). At this moment, with the loop running through the eye of the needle 24, a part Y, which runs to the yarn supply, is inside the threading tube 18, while a part X ¹ , which runs to the basic fabric B, is also threaded into the eye of the needle 24, but outside the Threading tube 18 is located. Fig. 11 shows the device at the end of the forward movement of the threading tube 18. At this point the yarn can be cut if a multi-colored or single-colored cut dimpled product is desired. This is done by means of the cutting device 40, which consists, for example, of a band saw, a laser cutting device or a reciprocating cutting device. the latter is moved forward when the threading tube 18 reaches its extreme advanced position. If a band saw is used, a notch 99 can be cut in the lower part of the threading tube so that the cutting device extends into the notch as far as the plane which represents the end of the tube where the yarn is folded into a loop (Fig. 22 ).

After the yarn has been cut, the color can be changed, with part Y remaining in base fabric B and part Y ¹ remaining in threading tube 18. The color change is performed using the yarn draw gear 1 Zf of the dosing device 12, which withdraws the Garnlitze on actuation, against the directed against the backward movement of the yarn air pressure from the pressure

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source 30 »which is preferably constant. After the strand of twine has been withdrawn, another strand of twine can be selected and are fed to the threading tube 18, which is preferably in his The forward position remains, the yarn change taking place exclusively by means of the metering device 12 and the pneumatic pressure. The threading tube 18 can be withdrawn and then with the newly selected one Strand of yarn are moved forward. However, this is not the case indispensable. After the newly selected strand of yarn moves forward the threading tube 18 is withdrawn from the eye of the needle 24 (Fig. 12), whereby the two threads are of different colors run through the eye of the needle 24 (Fig. 13) -

Shouldn't the thread color be changed after the cut the threading tube 18 is simply withdrawn (Fig. 12, 13) »whereby two yarn ends of the same color remain in the eye of the needle 24 and can be tufted. .

The next work steps are independent of whether a color change did not take place beforehand. Fig. 14 shows the needle at the beginning of their downward movement to insert both ends of the yarn in the basic goods B. When the needle 22 is the lowest point reaches its stroke (Fig. 15), both ends of the yarn are fully inserted and released from the eye of the needle 24. At this moment the clamp 97 is released and the base material B moves around one step forward.

"After the basic fabric has been moved forward (Fig. 16)," the needle 22 moves up to its loading position and pierces the basic fabric B. When it reaches its loading position (Fig. 17), the next cycle can begin. All other cycles are repetitions of this, it second cycle shown j in FIGS. 10 and 1. <

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ORIOiNALiNSPECTEP

If the bridge to be tufted or the carpet is to be monochrome, the yarn does not need to be cut. The single-colored loop pile bridge can take place from the yarn metering device 12 with continuous supply of yarn lengths of the same color. The threads 22 then pull through loops of yarn instead of the yarn cut into two pieces Y and Y ^{1 and thus form the loop pile.} 19 shows the threading tube 18 during retraction which leaves such a thread loop to be tufted in the eye of the needle 24. The operations are essentially identical to those shown in FIGS. 10-17. Only the cutting device 40 is not required in order to cut the loop into two pieces. According to FIG. 20, the needle is withdrawn through the base material, the loop being released from the eye of the needle and forming a tuft of loop pile.

According to FIGS. 22 and 25, the threading tube can through a Feed tube 98 can be replaced, which is reciprocating or stationary and in its feeding position on the needle eye 24 of the needle 22 is aligned. If the feed tube 28 is stationary, it remains in this position adjacent to the needle, with between there is a very small distance between its end and the needle 22. According to FIG. 22, a tuft is inserted into the base fabric B while the subsequent length of yarn is pressed by the air flow through the feed tube 98 into the eye of the needle 24, so that a Forms loop for tufting. In Figure 25 the loop is complete threaded so that the needle 22 is withdrawn through the base fabric B, and the loop remains in the same. This embodiment is particularly suitable for the production of loop pile, but the threaded loop can also be used for production cut pile tufts are cut so that, as in the previous embodiments, a color choice during the tufting is possible.

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ORiGiNAL INSPECTED

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According to a further preferred embodiment in the work sequence described in the previous paragraph, the Loop of yarn by means of a laser or other conventional one Facility cut after it is threaded. Uachdem the If the strand running to the yarn supply is threaded, it is fed through a different colored braid replaced (PIg ^ It).

The threading tubes 18 can be of a wide variety of designs. The side walls of the tube are relatively thin, for example about 0.12 mm (0.005 inch). To the because of the length To achieve the necessary strength of the pipe, upper and Underside should be made a little stronger. An additional advantage of this construction type is that the pipe fits well the dimensions of the needle and eye can be adjusted as the Needle width and accordingly the width of the eye as small as possible have to be. The small width of the hadle and the narrow spacing are often an important factor if the best possible pile density is to be achieved. ;: ''

The threading tube 22 can be according to different methods and made of different materials. So it can for example consist of injection molded plastic.

According to Fig. 1, the optionally to be used, the Venturi tubes containing block below the openings of the first Pipes be arranged. The main purpose of the venturis is ■ in making the thread easier to feed when replacing a broken thread or thread causing some other malfunction target. This eliminates the need for a mechanical device for Threading the yarn through the feed tubes.

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ORIGINAL INSPECTED

As mentioned above, the color change takes place during the taffeta cycle, so that when the tadel sticks once into the basic fabric, two ends of thread emerge from the same hole, one end having the first color and the second the newly selected color. During a normal color change, after the first yarn has been cut, it is withdrawn and replaced by a yarn of different colors during a tufting cycle, so that a product is created in which two individual yarn strands of different colors emerge from a hole in the base fabric B. The first yarn is withdrawn by means of a Eückzugmechanismus, as described in U.S. Patent No. 3,554,147. The threading tube 18 can remain in its forward position while the yarn is withdrawn by the retraction device 12X shown schematically. The pneumatic pressure is still available during this process. The yarn is therefore drawn back against the air flow. The clamp or brake 1 2C is released from the newly selected yarn, which is then conveyed further pneumatically, in this case preferably by means of overpressure.

Alternatively, to change the yarn, the first yarn can be withdrawn, whereupon the machine completes its tufting cycle. with only one end of the yarn with the first color in the eye of the needle is located. During the next cycle, the yarn is then used with the new one Color fed (Fig. 3 to 9)> with only a single end for the next needle stitch is fed. This results in the Line of the color change a change in density, because with the two successive needle stitches only one thread end instead of the otherwise usual two thread ends is inserted and out of the puncture hole protrudes.

18 shows the product made with the aid of the tufting machine according to the invention. The product has several important properties. With the option of color selection, the tufted product can be given a random color effect (Fig. 18). Complicated color patterns can also be produced if the machine is programmed accordingly.

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Many are within the scope of the invention Changes and modifications possible.

Claims

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ORIGINAL INSPECTED

Claims (9)

PATENT CLAIMS 1. Tufting machine for the formation of tufts on a base fabric, with a device for applying pieces of thread, which is arranged adjacent to the base fabric when it is in a position for threading, geke η η draws / through a Sinfädelrohr (18), which is arranged transversely to the device (22) for attaching the thread pieces, by a mechanism (70) for rocking the threading tube to and fro / for introducing thread strands in the threading position in relation to the device for attaching thread pieces, 1 through a with The pneumatic device (30) connected to the threading tube for threading the device for attaching the yarn pieces, through a strand cutting device (40) arranged adjacent to the threading position, through a device for actuating the yarn cutting device to cut the yarn strands | after threading (into the Device for attaching the pieces of grain so that the cut yarn in the device for attaching the Ga remains threaded, and by a device (25) for reciprocating movement of the device ^k for attaching the pieces of yarn for attaching the sliced. yarn on the base fabric (B) and to create tufts. 2. Tufting machine according to claim 1, characterized in that the strand cutting device (40) the side of the device (22) for attaching the yarn pieces facing away from the yarn feed direction is arranged. 509819/0473 ORiGiNAL SNSPECTED 23-538Ε4 3. tufting machine according to claim 1, characterized by geke η η, that the device for attaching pieces of thread ! Censure (22) with! Censure ears. (24) contains, and that that Einfädelrohr (18) is reciprocable through the Eadelöhre. 4. Tufting machine according to claim 3, characterized geke η η ze I, η et that the needle tube (18) contains a Schneidsehlit ζ (99), which extends from the end surface. To the inside, and that the G-arntrenneinrichtung. (14) is oriented so that it protrudes into the cutting slot which runs through the plane of the Endes'des Einfädelrohrs when it is in its threaded position. ^: . 5. ■ 'tufting machine according to claim 1, characterized in that g -e: ke η η - ζ eich η et that. the Eihfädelrohr (18) includes a narrow tubular portion of the means for _Anbrin-: gene can be brought into engagement of the Ganrstücke, as well as a widened part, project into the the Garnzufuhrrohre (34), said flared part partitions (. 19) contains by which a winding of the thread passed through ^: is changed. . 6. Procedure for attaching elbow nubs to a basic product by means of a tufting machine with I-needle attachments, pneumatic Facilities for transporting the braids, and with Separating devices · for separating the yarn into cut ones 509819/0473; ORIGINAL INSPECTED Length of yarn, characterized in that the needle device is inserted into a basic fabric that the Yarn pneumatically fed through, a threading tube and the threading tube and the yarn is inserted through an eye in the needle device so that the tufted yarn is cut open when Threading tube and thread are passed through the eye of the needle, that the threading tube is withdrawn from the eye of the needle, whereby a severed length of thread remains threaded in the needle, and that the needle device is withdrawn through the base fabric to - the cut length of yarn to form a Put down the tuft in the base fabric. 7. A method for attaching tufts to a basic fabric by means of a Tuftinas chine with needle devices for tufting, characterized in that a strand of yarn is threaded into the needle device, that the end of the strand of yarn is inserted into the basic goods that a new one in the needle device yarn loop is threaded, one end of which is _w with the introduced tuft of the previous working step and the other end connected to the yarn supply, 'and that the loop is inserted into the base fabric. 8. A method for attaching tufts to a base fabric by means of a tufting machine with needle devices for Tufting, characterized in that in the Nadeleimi a thread loop is threaded, one end of which is inserted into the base fabric and the other end to the 509819/0473 ORiGiNAL INSPECTED Yarn supply is connected, and that the yarn loop in the basic fabric is introduced by passing the needle device through the base fabric. 9. A method for attaching tufts to a "" · base fabric by means of a tufting machine with needles for tufting, thereby marked that in the eye 3 each needle one Thread loop is threaded, one end of which into the base fabric, is inserted while the second end of yarn from the yarn supply assumes that the loop of yarn is cut open, so that two strands of yarn threaded into the eye of the needle remain, that the eye of the needle is pushed through the basic fabric in order to insert the two strands of yarn into the gruril ware that the strands of the yarn be released from the eye of the needle, and that the eye of the needle for the is returned to its charging position in the next cycle. 1oo method of claim 9 ₉ characterized GEK en characterized ₉ that the Garnlitze connected to the yarn supply is withdrawn from the eye of the needle after the cutting and before the pushing through of the needle eye η, and in that the retracted litze is replaced in the eye of the needle by a Garnlitze with other color. · _{o The} method according to claim 9, characterized in that, for threading, yarn is pneumatically guided through a threading tube and the threading tube is passed through the eye of each needle device. 5098 19/0473 ORIGINAL INSPECTED Blank page