CN116905170A - Flat knitting machine and method for producing double-sided plaited, in particular filament knitted - Google Patents

Abstract

The present invention relates to a flat knitting machine and a method for producing a double-side plated knitted fabric, particularly a yarn knitted fabric. A flat knitting machine with a knitting system is proposed, which has at least one first cam assigned to a first needle bed for producing a knitted fabric, which is formed from at least one first yarn and at least one second yarn, wherein the at least one first yarn and the at least one second yarn can be fed by separate yarn guides, wherein the first cam is provided with two different draw cams for a first needle and a second needle, wherein the first draw cam draws the first needle out into a first and a second yarn laying position, and the second draw cam draws the second needle out into only the first yarn laying position, wherein the second draw cam has two differently stretched non-horizontal sections in the region of each limiting cam part (20).

Description

Flat knitting machine and method for producing double-sided plaited, in particular filament knitted

Technical Field

The invention relates to a flat knitting machine with a knitting system having at least one first cam assigned to a first needle bed for producing a knitted fabric, which is formed from at least one first yarn, for example a plied yarn, and at least one second yarn, for example a jacquard yarn, wherein the at least one first yarn and the at least one second yarn can be fed via separate yarn guides, wherein the first cam is provided with two different draw cams (Abzugskurven) for the first needle and the second needle, wherein the first draw cam draws the first needle into a first and a second yarn laying position and the second draw cam draws the second needle into only the first yarn laying position.

Background

In order to expand the diversity of patterns in knitted textiles, it has been proposed to produce so-called hollowed-out patterns in the knitted fabric, wherein the stitches or stitch sets are transferred such that openings are created in predetermined areas of the knitted fabric. The disadvantage here is that less coil capacity is available for generating coils due to the transfer process. Furthermore, the area of the knitted fabric where the loops are transferred loses stability.

For older flat knitting machines, the yarn technique (filighlntechnik) can be used to form knitted fabrics because the unselected needles are still slackening in the subsequent knitting system.

In order to manufacture knitwear using the filar technique, EP 2 671 989 A1 describes a flat knitting machine in which two knitting systems are present. A relatively thin ply yarn mat is first placed in the upstream knitting system (tuck), but the existing yarn (stitch) does not drop. It remains on the latch (the tuck-stitch that has been placed). In the downstream knitting system, the second yarn is laid down in selected needles. The needles then stitch, whereby the needles into which one or both yarns have been laid form loops.

In order to be able to better utilize the existing machine capacity and to increase the knitting speed, EP 3 556,921 A1 proposes a flat knitting machine in which a single knitting system is sufficient for producing the filigree knitted fabric. However, only a single knit fabric can be produced by using such a flat knitting machine.

Disclosure of Invention

It is therefore an object of the present invention to provide a flat knitting machine and a method whereby a multi-needle bed double knit, such as a filigree knit, can be manufactured with only one knitting system.

According to the invention, this object is achieved by a flat knitting machine with a knitting system having at least one first cam assigned to a first needle bed for producing a knitted fabric, which is formed from at least one first yarn and at least one second yarn, wherein the at least one first yarn and the at least one second yarn can be fed by separate yarn feeders, wherein the first cam is provided with two different draw cams for the first needle and the second needle, wherein the first draw cam draws the first needle out into a first and a second yarn lay position, and the second draw cam draws the second needle out into only the first yarn lay position, wherein the second draw cam has two differently stretched non-horizontal sections in the region of the respective limiting cam part. In particular, the two sections are oriented non-parallel to the knitting direction.

By providing the selected first and second needles with different draw cams, the first and second needles can be guided into different draw cams. The choice of which draw cam determines whether both the first yarn and the second yarn are laid into the needle or only the first yarn is laid into the needle. The first yarn and the second yarn can be supplied by different yarn guides, which can be arranged one after the other, so that yarn pads can also be placed in the knitting needles at different positions of the knitting cams. This makes it possible to manufacture a filigree or another knitted fabric, such as a lining knitted fabric or a knitted fabric with a plating pattern, with one single stitch, especially if the yarns are binding yarns and the yarns are jacquard yarns. When the first yarn is much finer than the second yarn, a hollowed-out pattern or a filigree knit is created.

The two sections of the second loop back cam with different profiles can be designed to be curved or straight. In this way, it is possible to match the needles of the other needle bed and to produce a double-sided knitted fabric in a simple manner. In a particularly simple design, the sections can be designed straight, with different angles to the horizontal.

The flat knitting machine may also have a second needle bed assigned a second cam of knitting system designed similarly to the first cam. By providing two needle beds, a double-sided knitted fabric can be manufactured with a plurality of needle beds. Since the second stitch cam has different sections with different directions, it is ensured that the knitting needles on both needle beds can reliably form stitches.

It is in principle conceivable to use more than two yarn guides. These yarn guides may be self-sufficient and/or driven by a carriage. It is also possible in principle to provide more than one knitting system according to the invention in a flat knitting machine.

In particular, various types of knitted fabrics may be manufactured, such as double-sided knitted fabrics, hollowed patterns, plated patterns, plush, lined knitted fabrics, and the like, in which yarns are joined and/or separated according to patterns. The threads supplied by the thread guides may be of the same material. However, their color, thickness and/or material may also be different. The yarn can be freely selected according to the fineness of the machine. With the knitting system of the flat knitting machine according to the invention, at least two yarns can be treated so that the yarn lay-up can be selected for each needle in each cam as follows:

-not knitting;

yarn from yarn guide 1 or 2;

yarn from yarn guides 1 and 2;

the cam-limiting element of the knitting cam can have guide surfaces which have different courses, in particular different angles with respect to the horizontal plane or the knitting direction. By this measure, the two sections of the second loop back cam can be realized simply by different processes.

If the guide surfaces are designed straight or flat, the first guide surface in the knitting direction may have a larger angle with respect to the knitting direction or the horizontal plane than the second guide surface in the knitting direction. By this measure, the needle can be withdrawn so far that no extra yarn pad from the second yarn guide can be placed in its hook. The yarn from the second yarn guide floats on this needle. The sections with different courses can be adapted to the geometry of the needles of the needle bed that are assigned to the opposite, respectively further cam. This facilitates reliable knitted fabric production.

Both the first and second stitch cams may have horizontal sections oriented parallel to the knitting direction. By this measure, the needle can be slowed down as it is withdrawn.

The horizontal section of the loop back cam may start before the limit cam member in the knitting direction. It is thereby ensured that the needles, when they are retracted, slow down before they reach sections of the stitch cam having different angles with respect to the horizontal plane.

The at least one first yarn and the at least one second yarn may be supplied by separate yarn guides arranged one after the other in the knitting direction. In particular, if autonomous yarn guides are provided, the position of the yarn guides, seen in the knitting direction, can also be changed with respect to each other and/or with respect to the knitting cams, in particular vice versa. By arranging the yarn guides one after the other, yarn laying can be performed at different positions of the knitting cam.

The use of more than two yarn guides is also conceivable.

The first cam can be assigned at least one selection point for at least indirectly selecting the knitting needle in which the at least one yarn should be laid. Instead of the needles, intermediate slides, sinkers, etc. can be chosen directly, which then ensure that the needles are ejected. The selection point may be arranged in the knitting direction before the knitting cam or at the cam entrance. If only one selection point is provided, a first needle can be selected in a first knitting direction and a second needle can be selected at the same selection point when the strokes are opposite (carriage direction).

The knitting member, in particular the intermediate slider, the knitting needle and/or the sinker, can be brought to the first position at least one selection point if the first knitting needle is to be selected for forming a stitch with at least one first yarn and at least one second yarn, and to the second position at least one selection point or at least one second selection point if the second knitting needle is to be selected for forming a stitch with only at least one first yarn. The first and/or second selection points may be assigned to the first stitch cam. They may be arranged before the triangular inlet. The first cam can have at least three tracks for knitting elements, in particular a middle slider track. At one or more selection points it can be determined which track the knitted element or the foot of the knitted element reaches. In this way it is possible to determine whether the needle is ejected and, if it is ejected, whether it enters the first stitch cam or the second stitch cam.

The second cam can be designed similarly to the first cam and can therefore also be assigned one or more selection points and can have a track for the knitting element.

At least one of the knitting cams may have at least one further selection point for selecting a third knitting needle for the tucking. In particular, two further selection points may be provided. This makes it possible to additionally place tuck-back pads from the first yarn guide and/or both yarn guides into the respectively selected knitting needles. Accordingly, a further track for the knitting element, in particular a middle slider track, can be provided. This results in a further degree of freedom in the design in the production of the knitted fabric.

It is relevant to help that at least one cam has at least one additional intermediate slide track. The needles for the tuck-stitch padding can be selected by other intermediate rail-way. Each intermediate slider track may also be assigned its own selection point.

The invention also relates to a method for producing a knitted fabric on a flat knitting machine having a knitting system with at least one first cam assigned to a first needle bed for producing a knitted fabric, which is formed from at least one first yarn and at least one second yarn, wherein the at least one first yarn and the at least one second yarn can be fed via separate yarn guides, wherein, in order to form a loop with the at least one first yarn and the at least one second yarn, the first needle is ejected, the first needle is subsequently withdrawn in a first withdrawal cam, in which the first needle is held at a yarn rest height for such a long time that the first yarn can be first placed from the first yarn guide to its hook and then the second yarn can be placed from the second yarn guide to its hook, after which the first needle is completely ejected, and in order to form a loop with only the one or more first yarns, the second needle is ejected, and then the second needle is withdrawn in a second withdrawal cam, wherein the second needle is withdrawn along a non-horizontal withdrawal cam of the second needle is not stretched along a second cam.

Depending on whether and how the needle is selected, it may form a loop with the first yarn and the second yarn, or with at least one first yarn alone. When two needle beds are provided, this applies to both needle beds. In this way, a double knit can be produced in which the yarns are connected and/or separated according to a pattern. In addition, hollowed out patterns, plated patterns, plush and lined knits can be created. The pattern produced by the method according to the invention may extend over the entire width of a row of coils or only over one or more partial areas thereof.

For selecting the needles, a knitting element, such as an intermediate slider, can be used, wherein the knitting element can be brought to a first position at least one selection point if a first needle is to be selected for producing stitches with a first and a second yarn, and to a second position at the same or another selection point if a second needle is to be selected for producing stitches with only the first yarn. The selection of the needles can thus be controlled by the knitting elements, in particular by the intermediate slider, and one or more cam bands (Schlosskurven) or rails can also be provided for these knitting elements.

The knitting needle selected at the at least one selection point can be pressed to half the height of the butt by means of the intermediate slider and the needle-pressing cam part in the first position, so as to be introduced into the first draw-off cam. On the other hand, in the second position of the intermediate slider, no pressure is exerted on the needles by the needle-pressing cam member, so that their butts can be introduced into the second stitch cam located lower.

In particular, it is thus possible to select a first knitting needle at a selection point assigned to a first cam and to select a second knitting needle at the same selection point or at a second selection point assigned to the first cam. The selection of the needles may mean that the intermediate slider is first selected, which controls the needles accordingly.

The second needle can only remain in the second draw cam at the yarn lay height for a certain period of time until at least the first yarn can be laid by the yarn guide into its hook and then further withdrawn before they reach the yarn guide with the second yarn. In order to produce a double-sided knitted fabric, it can also be provided that, in order to form a loop with at least one first yarn and at least one second yarn, the first needles of the second needle bed assigned to the second needle bed are selected and ejected, which are then ejected in a first stitch cam of the second needle bed, in which first stitch cam they are held at the yarn-laying height for a period of time until the first yarn can first be laid by a first yarn-guide pad into their hooks, and then the second yarn can be laid by a second yarn-guide pad into their hooks, after which the first needles are completely ejected, and in order to form a loop with only one or more first yarns, the second needles of the second needle bed are selected and ejected, which second needles are then ejected in a second stitch cam of the second needle bed, wherein the second needles are first ejected along a non-horizontal first section of the second stitch cam and then are ejected along a different non-horizontal second section of the second stitch cam.

The needles of the first and/or second needle bed can be selected at another selection point and ejected for the purpose of laying down the tuck of the first yarn with the first yarn guide and/or for the purpose of laying down the tuck of the second yarn with the first yarn guide and the second yarn guide. By this measure, a further degree of freedom of design in the production of the knitted fabric is created. It is also possible to provide one selection point for selecting a needle for laying a tuck of a first yarn with a first yarn guide and another selection point for selecting a needle for laying a tuck of a first yarn with a first yarn guide and a second yarn with a second yarn guide.

The knitting method according to the invention may in particular comprise that the knitting needles selected at the at least one selection point likewise enter the knitting triangle and are ejected to the stitch level. The loop on the needle is thus brought behind the latch. When the needles are retracted, they can be slowed down by a short horizontal needle path (a section of the stitch cam). The yarn pad from the first yarn guide can now be placed into all selected needles. The second needles selected at least one or the other selection point can be withdrawn further along the first section of the draw cam in a subsequent process, in particular at a steep cam angle, so that the hooks of these needles no longer catch any other yarn. This is followed by a second section of the draw cam, in particular a flatter section of the draw cam, which can be adapted to the knitting needle geometry of the opposing knitting needle which is still at the level of the yarn rest. The first and second sections may be directly adjacent to each other. However, there may also be a middle section between two differently stretched sections of the loop back triangle.

The actuation butt of the first knitting needle selected at the at least one selection point can be pressed to half the right-angle joint via the intermediate slider and the pressure piece. They therefore enter the second loop back cam and remain at the level of the yarn laying section. The yarn from the second yarn guide is now additionally laid in its hook. The thread can emerge from the second thread guide through the needles that have been withdrawn lower.

The selected needle can be sinked to the desired stitch length at the ravel portion and the old stitch can be stripped. The lower introduction means allow the needles to be restored to their regular alignment or to their starting position. If two other intermediate slider tracks are provided, it is also possible to place tuck-back with threads from the first thread guide or from both thread guides into the respectively selected knitting needles.

The knitting needles used may be latch needles or compound needles.

Other features and advantages of the invention will be apparent from the following detailed description of the embodiments of the invention, taken in conjunction with the accompanying drawings, which illustrate major details of the invention, and from the claims. Features illustrated herein are not necessarily to scale and are described so that the particularity of the invention resides in the apparent manner. In variations of the invention, the various features may be implemented singly or in any combination of the various features.

Drawings

In the schematic drawings, embodiments of the invention are shown in different phases of use and are explained in more detail in the following description.

Fig. 1a shows a plan view of a knitting system with two knitting cams and three intermediate slide tracks.

Fig. 1b shows a plan view of a knitting system with two knitting cams, each cam having five intermediate slider tracks.

Fig. 1c shows a plan view of an alternative design of a knitting system with two knitting cams and three intermediate slide tracks.

Figures 2a-2e show the needle positions of the needles of the two opposite needle beds corresponding to the positions a-e in figure 1 a.

Figures 3a-3e show different possibilities for yarn lay-up for manufacturing a knitted fabric using the knitting cams according to the invention.

Detailed Description

Fig. 1a shows a knitting system 100 of a flat knitting machine with a front first cam 101 and a rear second cam 102, wherein the first cam 101 is assigned to a first needle bed and the second cam 102 is assigned to a second needle bed.

In the example shown, two selection points A1 and A2, which are only symbolically shown here, are provided for each knitting cam 101, 102, in particular at the cam entrance. There may also be more or fewer selection points. Furthermore, two yarn guides F1, F2 arranged in sequence in the knitting direction SR are provided for supplying yarn to the knitting cams 101, 102. More than two yarn guides may also be used. For the sake of simplicity of the drawing, only the cam band SN for the needle associated with the knitting process and the cam band SZ for the associated knitting element, in particular the intermediate slider, are shown. Yarn supply by the yarn guide F1 occurs at an earlier point in time than yarn supply by the yarn guide F2. In the embodiment shown, the yarn guide F1 is provided for supplying a first yarn and the yarn guide F2 is provided for supplying a second yarn. The supply of the first yarn thus takes place at an earlier point in time than the supply of the second yarn. However, it is also conceivable to change the relative positions of the yarn guides F1, F2 so that the second yarn is supplied first and then the first yarn is supplied.

The withdrawal of the needle selected at the selection point A2 (see triangle SN of the partial solid line) occurs at an earlier point in time than the withdrawal of the needle selected at the selection point A1 (see triangle SN of the partial broken line).

At the first selection point A1, wherein the first selection point A1 is provided for the first and second knitting cams 101, 102, an intermediate slide, not shown here, is moved to position 2 or an intermediate slide rail (partially dashed cam band SZ), so that the activated, not shown knitting needles are controlled by these cam parts, so that these cam parts place both the yarn of the yarn carrier 1 and the yarn pad of the yarn carrier 2 into the hook. At the second selection point A2, in which each cam 101, 102 has a second selection point A2, the intermediate slider, not shown here, is moved to position 1 or to the intermediate slider track (cam band SZ in solid line), so that the activated needles, not shown, are controlled by these cam elements, so that these cam elements merely place the yarn pad of the first yarn guide F1 into the hook and are then withdrawn to such an extent that they can no longer capture the yarn of the second yarn guide F2 with its hook.

The needle paths (cam band SN) in the knitting cams 101, 102 are shown with solid lines. The needle path regions (triangular panel SN) in which the butt or the coupling butt is pressed and in which the knitting needle moves are indicated by dashed lines, both yarns coming from the thread guides F1, F2.

For this purpose, the knitting needles activated at the selection point A1 by the intermediate slide enter the knitting cams 101, 102 and are respectively pushed out to the stitch level by the knitting ejector 10. The loops in the hooks are thus brought behind the respective latch. When the needles are retracted, they are slowed down for yarn laying by the stitch cams 23, 24, i.e. the horizontal section 11 of the cam track in the second cam half, and the yarn is laid by the yarn carrier F1 in the laying position E1 into the hooks of all selected needles of the first and/or second needle bed. The actuation butt of the needle selected or activated at the selection point A1 is then pressed to half the right-angle joint by means of an intermediate slider and presser 30, not shown here. Due to the described measures, the needles pressed against half of the right-angle joint enter into the draw-back cams 23 shown here in dashed lines, in which draw-back cams 23 these needles are held at the ejection height for the yarn lay-up, i.e. they remain on the horizontal section 11. In the needle held in said position, the second yarn is laid into the hook of the needle by the yarn guide F2 at the laying position E2, the yarn guide F2 being arranged downstream of the yarn guide F1 in the knitting direction SR. The yarn floats on the needle that has been withdrawn.

Then, all the needles participating in the knitting process are withdrawn at the loop withdrawing portion 40 downstream in the knitting direction to a desired draw depth, wherein old loops respectively located behind the latch are stripped.

The yarn laying section is also shown, in which only the yarn of the first yarn guide F1 is laid into the hooks of the needles of the first and/or second needle bed selected for this purpose. The needle activated by the intermediate slide at the selection point A2 enters the knitting cams 101, 102 and is ejected to the stitch level by the knitting ejector 10. The loops in the hooks are thus brought behind the respective latch. When the needles are withdrawn, they are slowed down by the horizontal section 11 in order to lay the yarn, and the corresponding yarn is laid by means of the yarn guide F1 in the laying position E1 into the hooks of the needles involved in the knitting process. The needle activated at the selection point A2 is then retracted by means of the guide surface 21 formed on the knitting limiting portion 20 (in particular at a steep angle to the horizontal or knitting direction SR) until the yarn of the yarn carrier F1 cannot be placed in its hook. This is followed by a guide surface 22 on the knitting limiting portion 20, which has a different non-horizontal course than the guide surface 21, in particular a smaller angle with respect to the horizontal, and which is adapted to the knitting needle geometry of the opposing knitting needle of the respective other needle bed, which is still at the level of the yarn rest. The loop back cam 24 thus has a non-horizontal section 21 'and a non-horizontal section 22' which extends in a different manner. In the embodiment shown, the sections 21', 22' are designed straight and have different angles with respect to the horizontal plane or knitting direction SR. The guide surfaces 21, 22 are correspondingly designed flat.

The sections 21 'are arranged at a larger angle relative to the horizontal than the sections 22'.

Then, all the needles participating in the knitting process are withdrawn at the loop withdrawal portion 40 downstream in the respective knitting direction to the desired draw depth, wherein the old loops respectively located behind the latch are stripped off. By means of different binding and knotting patterns which can be incorporated into the knitted fabric, it is possible, for example, to influence the stretchability, elasticity or feel of the knitted fabric.

An alternative embodiment of a knitting system 100' is shown in fig. 1b, with a first cam 101' assigned to a first needle bed and a second cam 102' assigned to a second needle bed. Parts corresponding to the first embodiment of the knitting system according to fig. 1a have the same reference numerals.

In the knitting system 100' according to fig. 1b, not only the selection points A1, A2 but also further selection points A3, A4, which are only symbolically shown, are defined for each knitting cam 101', 102'. Select points A1-A4 are assigned to respective knitting cams 101', 102'. They are preferably arranged at the triangular inlet. The intermediate slide can be selected as a knitting element at the selection points A1-A4 and accordingly assigned to the positions 0-4 or the track (intermediate slide track) for the knitting element according to the cam band SZ. If the intermediate sliders are in position 3 or 4 or the assigned track, they and the associated coupling butts of the needles are pressed at the triangle center at point 15, so that the associated needles cannot be ejected to the stitch level. Thus, at least one tuck is padded into the needle. After the yarn has been laid at E1, the needle is withdrawn from the yarn guide F1, the middle slider of which passes through the cams 101', 102' on the track or position 3. The knitting needle, the middle slider of which passes through the triangle on the track or position 4, remains at the level of the yarn laying portion and additionally lays the yarn from the yarn guide 2 at E2.

Not shown are the triangular channels of the intermediate slide that are not selected. These intermediate sliders remain on the track or position 0 and are pressed there, the butt of the coupling portion of the associated needle thus being disengaged from the right-angle joint.

Fig. 1c shows an alternative embodiment of a knitting system 100 "with a first knitting cam 101" assigned to a first needle bed and a second knitting cam 102 "assigned to a second needle bed. Parts corresponding to the first embodiment of the knitting system according to fig. 1a have the same reference numerals.

The present embodiment is characterized in that only one selection point A1 is assigned to the knitting cams 101", 102" in advance. For the 3-way technique it is necessary to already indicate or decide in the original carriage direction which needle in the next row should perform the action. After the carriage has reversed, the selected sinkers are distinguished again, so that it is determined which intermediate slides pass the corresponding knitting cams 101", 102" on position 1 or 2 or the assigned rail/cam band ZS.

There are two selection points A5, A6 on one side between the triangle 101", 102" and the following triangle 103", 104". In the carriage direction SR shown, these selection points are assigned to the cams 103", 104" or are arranged on the cam input side to these cams 103", 104". In the case of knitting cams 103", 104", the needles are therefore selected in succession at selection points A5, A6.

Thus, a selection unit may consist of one selection point (A1) or a plurality of selection points (A5, A6).

Another feature of knitting system 100 "is the switching between knitting and tucking. This is achieved by: the limit cam member 13 and the loop limit member 12 above the knitting ejector portion 10 are alternately turned on or off. In the position shown in fig. 1c, the limit triangle 13 is on and the collar limit 12 is off.

The cam band SN in the region of the knitted top portion 10 and the region of the loop taker-in restriction member 12 do not correspond to each other. The knitting needles are controlled by these cam elements at the rear foot of the coupling portion. In order that the forefoot may move together along this path, the loop limit component 12 is switched to an inactive state. The rear coupling heel is pressed against the half-foot engagement, the forefoot cannot be pressed by the approach of the clamping point in the knitting needle and thus moves past the cam.

Fig. 2a shows the needle position corresponding to position a in fig. 1 a. Two selected needles SN1, SN2 of the first and second needle beds, not shown here, are ejected by the first and second cams 101, 102 and bring the loops respectively located in the hooks to the back of the latch. In this illustration, both needles SN1, SN2 are located at the level of the yarn rest E1 in the horizontal section 11. Yarn from the yarn guide F1 is padded into the two needles SN1, SN 2.

Fig. 2b shows a diagram corresponding to position b in fig. 1 a. The butt of the coupling portion of the needle SN1 of the first needle bed is pressed to half the butt height by the presser 30, and the butt of the coupling portion of the needle SN2 of the second needle bed is not pressed by the presser 30. The butt of the coupling portion of the needle SN1 of the first needle bed thus reaches the broken line portion of the triangular band SN and stops at the level of the yarn rest. The yarn from the yarn guide F2 is now additionally padded in the hook of the needle SN 1. The needle SN2 of the second needle bed is withdrawn so far in the cam band SN by its coupling portion butt that no extra yarn pad from the yarn carrier F2 can be placed in its hook. The yarn from the yarn guide F2 floats above the needle SN 2. The needle SN2 is now located in the region of the relatively flat guide surface 22 of the knitting limiting portion 20 of fig. 1a, which guide surface is adapted to the needle geometry of the opposing needle SN1 still at the level of the yarn rest. However, the needles SN2 of the second needle bed are withdrawn only to such an extent that the yarn coming from the yarn guide F1, which is laid in its hooks, can still pass over the chest of the needles SN1 of the first needle bed at the level of the yarn laying portion.

Fig. 2c shows the needle position corresponding to position c in fig. 1 a. For the coupling portion heel of the needle SN1 of the first needle bed, the retraction movement is now started on the loop-withdrawing portion 40 of the first cam 101. The hooks of the needles SN1 of the first needle bed catch the yarn of the yarn carrier F2. The needle SN2 of the second needle bed is further withdrawn on the guide surface 22 and follows the contour of the needle SN1 of the first needle bed from the breast to the hook. The needle SN2 is only withdrawn to such an extent that the yarn from the yarn guide F1, which has been placed in its hook, can still pass the stem of the needle SN1 of the first needle bed.

Fig. 2d shows a diagram corresponding to position d in fig. 1 a. The butt of the coupling portion of the needle SN1 of the first needle bed is further withdrawn at the loop-withdrawing portion 40. The hooks of the needle are provided with yarns from yarn guides F1 and F2. The needle SN2 of the second needle bed is further withdrawn on the guide surface 22 and follows the contour of the needle SN1 of the first needle bed from the breast to the hook. The needle SN2 is only withdrawn to such an extent that the yarn of the yarn carrier F1, which is placed in its hook, can still slide over the stem of the needle SN1 of the first needle bed. However, it exits so deeply that the yarn laid in the needle SN1 of the first needle bed can slide past the hooks of the needle SN2 of the second needle bed.

Fig. 2e shows the needle position corresponding to position e in fig. 1 a. The coupling heels of the needles SN1, SN2 of the first and second needle beds are withdrawn to the desired stitch length on the respective loop withdrawal portions 40 of the first and second cams 101, 102. The old coil is knocked off. In the following process, the two needles SN1, SN2 are brought again into their original position and are ready for the next knitting operation.

Figures 3a-3e show different possibilities for yarn lay-up for manufacturing a knitted fabric using the knitting system according to the invention.

Fig. 3a shows an exemplary first possible yarn run. Yarn from yarn carrier F1 is laid (R-R) into needles A-T, a-s of first and second needle beds V, H. Yarn from the yarn carrier F2 is laid (plated) into all the knitting needles a-T of the first needle bed V. The stitches formed on the second needle bed H may be knocked off in the following knitting cams or, after the carriage is reversed, with the same knitting cams. Thereby creating a plush pattern.

Fig. 3b shows a second possible yarn run. Yarn from the yarn carrier F1 is padded to all the needles a-T of the first needle bed V and to every second needle b, d, F, H, j, l, n, p, r of the second needle bed H. Yarn from the yarn carrier F2 is laid (plated) into all the knitting needles a-T of the first needle bed V. The stitches formed on the second needle bed H may be knocked off in the following knitting cams or, after the carriage is reversed, with the same knitting cams. Thereby creating a plush pattern.

Fig. 3c shows another alternative yarn run. The yarn from the first yarn guide F1 is laid as a 5X 5 rib in the needles A-E, J-N, S-T of the first needle bed V and in the needles e-i, n-r of the second needle bed H. The yarn from the second yarn carrier F2 is padded as a5 x 5 rib with 1 x 1 to the needles A, C, E, J, L, N, S of the first needle bed V (every second needle) and the needles e, g, i, n, p, r of the second needle bed H. The elasticity of the knitted fabric can be influenced, for example, according to the yarn used in the yarn guide F2.

In the yarn run shown in fig. 3d, the yarn from the yarn carrier F1 is laid down in all the needles a-T, a-s of the first and second needle beds V, H (R-R). The yarn from the second yarn carrier F2 is laid down at 1×1 into the needles A, C, E, G, I, K, M, O, Q, S of the first needle bed V and the needles b, d, F, H, j, l, n, p, r of the second needle bed H. The elasticity of the knitted fabric can be influenced, for example, according to the yarn used in the yarn guide F2.

In the yarn run according to fig. 3e, the yarn coming from the yarn guide F1 is laid down in all the needles a-T of the first needle bed V. Yarn from the second yarn guide F2 is laid down in every third needle A, D, G, J, M, P, S of the first needle bed V. The result is a mesh appearance. For example, the characteristics of the knitted fabric on the body side can be influenced by the yarn used in the yarn guide F2, for example in sportswear for perspiration.

In summary, in the method according to the invention, in the example according to fig. 1a, 1b, the needles for ejection can be selected at two mutually spaced selection points A1, A2 of the first and second cams 101, 101', 102', respectively, thereby deciding whether to lay the yarn from the yarn guide F1, from the yarn guide F2, or from the yarn guides F1 and F2. In the example according to fig. 1c, a needle for laying up yarn with the yarn guide F1 and a needle for laying up yarn with the two yarn guides F1, F2 can be selected at a selection point. For this purpose, one or more intermediate slides of the described or corresponding knitting cams 101, 101', 101", 102', 102" can be moved into position 1 or position 2 (also rail 1, rail 2). The needle ejection can be identical for both yarn lay-up positions E1, E2. The loops in the hooks can be brought behind the corresponding latch when the corresponding needle is ejected. With the needle retracted, the yarn can be laid by the first and/or second yarn guides F1, F2 in the needle selected at the selection point A1 (and possibly A2) at one or more laying positions E1, E2 of the first and/or second cams 101, 101', 101", 102', 102". The selected needles can be slowed down by the horizontal section 11. The needles activated by the intermediate slide according to position 1 can be retracted by the knitting limiting portion 20 before the needles activated by the intermediate slide according to position 2, so that they can only lay in one yarn in the laying position E1 without reaching the laying position E2. After the horizontal section 11, the needle activated by the intermediate slider according to position 1 can first be withdrawn at a steep cam angle and then at a flatter cam angle (corresponding to the guide surfaces 21, 22). The needles activated by the intermediate slide according to position 2 can be pressed by the presser 30 to half the height of the butt, thereby bringing them into a second cam band which holds them in a yarn laying position, so that the yarn can be laid in the hooks of the needles in the laying position E1 by one of the first and/or second yarn guides F1, F2. By means of the other of the first and second yarn guides F1, F2, the yarn can be laid in the laying position E2 into the needle that has been selected by means of the intermediate slider according to position 2. Subsequently, all the needles involved in the knitting process can be raveled to the desired stitch depth by the ravel portion 40 downstream in the knitting direction.

Claims (16)

1. A flat knitting machine with a knitting system (100, 100 ') having at least one first knitting cam (101, 101 ') assigned to a first needle bed (V) for producing a knitted fabric formed by at least one first yarn and at least one second yarn, wherein the at least one first yarn and the at least one second yarn can be supplied by separate yarn guides (F1, F2), the first cam (101, 101 ') is provided with two different stitch cams (23, 24) for a first needle and a second needle, wherein the first stitch cam (23) withdraws the first needle into a first and a second yarn rest position (E1, E2) and the second stitch cam (24) withdraws the second needle into only the first yarn rest position (E1), characterized in that the second stitch cam (24) has two differently stretched non-horizontal sections (21 ', 22 ') in the area of each restriction cam part (20).

2. Flat knitting machine according to claim 1, characterized in that the flat knitting machine also has a second needle bed (H) and that the second needle bed (H) is assigned a second knitting cam (102, 102', 102 ") of the knitting system (100, 100', 100") which is designed similarly to the first knitting cam (101, 101', 101 ").

3. Flat knitting machine according to any of the preceding claims, characterized in that the restriction cam part of the knitting cam (101, 101', 101", 102', 102") has guiding surfaces (21, 22) with different trend, in particular different angles with respect to the horizontal plane.

4. Flat knitting machine according to any of the preceding claims, characterized in that the sections (21 ', 22') with different orientations are adapted to the geometry of the needles of the opposite needle bed (V, H) assigned to the respective other knitting cam (101, 101', 102', 102 ").

5. The flat knitting machine according to any of the foregoing claims, characterized in that the first and the second stitch cams (23, 24) each have a horizontal section (11) oriented parallel to the knitting direction (SR).

6. The flat knitting machine according to any of the foregoing claims, characterized in that the horizontal section (11) of the stitch cam (23, 24) starts in front of the limiting cam part (20) in the knitting direction (SR).

7. Flat knitting machine according to any of the preceding claims, characterized in that the at least one first yarn and the at least one second yarn can be supplied by separate yarn guides (F1, F2) arranged one after the other in the knitting direction (SR).

8. The flat knitting machine according to claim 7, characterized in that the position of the yarn guides (F1, F2) relative to each other and/or relative to the knitting cams (101, 101', 101", 102', 102") is variable as seen in the knitting direction (SR).

9. The flat knitting machine according to any of the foregoing claims, characterized in that the first knitting cam (101, 101', 101 ") is assigned at least one selection point (A1, A2) for at least indirectly selecting a knitting needle into which at least one yarn pad is to be placed.

10. The flat knitting machine according to any of the preceding claims, characterized in that if a first knitting needle is to be selected for forming a stitch with the at least one first yarn and the at least one second yarn, knitting parts, in particular intermediate sliders, knitting needles and/or sinkers, are brought into a first position at the at least one selection point (A1, A2); if the second needle is to be selected to form a loop with only said at least one first yarn, it is brought to the second position at said at least one selection point (A1, A2) or at a second selection point (A1, A2).

11. Flat knitting machine according to any of the preceding claims 9 or 10, characterized in that at least one of the knitting cams (101 ', 102') has at least one further selection point (A3, A4) for selecting a third knitting needle for the tucking.

12. A method for producing a knitted fabric on a flat knitting machine with a knitting system (100, 100 ') having at least one first knitting cam (101, 101 ') assigned to a first needle bed (V, H) for producing a knitted fabric formed by at least one first yarn and at least one second yarn, wherein the at least one first yarn and the at least one second yarn are fed by separate yarn guides (F1, F2), wherein for forming loops with at least one first yarn and at least one second yarn, a first knitting needle is ejected, and the first knitting needle is subsequently withdrawn in a first stitch-withdrawing cam (23) in which the first knitting needle is held at a yarn-laying height for a time until it is possible to first withdraw the first yarn from a first yarn guide (F1) into its hook and then to second yarn from a second yarn guide (F2) into its hook, wherein the first knitting needle is first withdrawn along a second needle section (24 ') and then the second knitting needle is not completely withdrawn along the second cam (24 ') and the second knitting needle is not completely withdrawn along the second stitch-withdrawing cam (24 ').

13. Method according to claim 12, characterized in that said first needle is selected at a selection point (A1, A2) assigned to said first cam (101, 101', 101 ") and said second needle is selected at the same selection point (A1, A2) or at a second selection point (A1, A2) assigned to said first cam (101, 101', 101").

14. Method according to claim 12 or 13, characterized in that the second needle is kept in the second draw cam (24) at the yarn laying height only for such a long time until at least the first yarn can be laid into its hook by the first yarn guide (F1) and then is further withdrawn before they reach the second yarn guide (F2) with the second yarn.

15. Method according to any one of the preceding claims 12 to 14, characterized in that, in order to form stitches with at least one first yarn and at least one second yarn, the first needles of the second needle bed (H) assigned to the second cams (102, 102', 102 ") are selected and ejected, which are then withdrawn in the first withdrawal cam (23) of the second cams (102, 102', 102"), in the first withdrawal cam of the second cams (102, 102', 102 ") they are held at yarn-laying height for such a long time that they can first be laid by the first yarn guides (F1) into their hooks and then the second yarn is laid by the second yarn guides (F2) into their hooks, after which the first needles are completely withdrawn, and in order to use only one or more of the first yarn forming stitches, which are selected and ejected, which are then withdrawn along the second cams (24) of the second needle bed (24), which are not drawn out of the second cams (24 ') along the second cams (24 '), wherein the second needles (24) are not drawn along the second cams (24 ') at first, 24 ').

16. The method according to any one of the preceding claims 13 to 15, characterized in that the needles of the first and/or second needle bed (V, H) are selected at a further selection point (A3) and are ejected for the purpose of laying down the tuck of the first yarn with the first yarn guide (F1) and/or for the purpose of laying down the tuck of the second yarn with the first yarn guide (F1) and the second yarn guide (F2).