TW202012716A - Circular knitting machine with knitting function - Google Patents

Abstract

The circular knitting machine according to the invention has a needle cylinder rotating around a vertical axis and a sinker ring rotating with the needle cylinder. The needle cylinder is provided in its outer edge portion with vertically controllable tip needles with needle hooks opened downwards as loop-forming elements, and a for each tip needle, a surrounding sinker which supports the loop-formation is held movable in the radial direction on the sinker ring. Further, for each tip needle on the needle cylinder, a press sinker is kept on the sinker ring horizontally in radial direction, in order to close the hook tip of the tip needle by pressing the needle tip to the needle shaft. The press sinkers are each arranged on the sinker ring between two adjacent surrounding sinkers. With the circular knitting machine according to the invention, the needle wear can be reduced; further, a selection between weft knitting and warp knitting as loop-forming techniques in enabled in a single machine.

Description

Circular knitting machine with knitting function

The present invention relates to a circular knitting machine with less wear of machine parts, especially loop forming elements, and a wide range of possible loop forming techniques.

The conventional circular knitting machine uses a latch needle as the central loop-forming element. These are guided on the rotating cylinder and pushed and retracted according to their guidance (moving up or down) in the lock.

When forming a stitch on the knitting system of this circular knitting machine, the tongue portion of the latch needle that passes through and is pushed upward is first opened by the stitch on the needle shaft with respect to the previously formed stitch that slides downward, and then The loop is closed again and the needle is retracted relative to the needle shaft from the coil sliding up the needle axis. The process of opening and closing the latch needle is performed via the tongue hinge. Due to the frequency of their continuous actuation, there may be considerable yarn tension, and the tongue hinges of the latch needles and, with them, the latch needles are naturally prone to wear in knitting machines.

The failure of the tongue hinge produces incorrect loops and leads to errors in the knitwear. The replacement of the affected latch needles requires the knitting machine to stop. Due to the large number of latch needles in the cylinder, such failures may affect the operation of the knitting machine considerably. However, these problems not only lead to interruption of operation, but also the relatively high cost of the latch needle, and its manufacturing is expensive due to the need for mechanical load performance.

Therefore, it is of particular interest to use simpler and less damaging needle patterns in knitting machines. The needle type with a simpler structure is a tip needle, especially when there is no mechanical movement, the hook is opened downward at the top of the needle. By the external pressure toward the needle shaft, the needle hook can be elastically closed.

Such circular knitting machines that work with sharp needles are described in documents DE 1 635 878 A and DE 361 135.

When knitting with pointed needles in a circular knitting machine, when the needle is pulled out (during the loop formation), the needle hook must be elastically closed from the outside with a pressing roller so that it does not pick up old stitches other than new yarn. This pressing wheel is installed outside the needle cylinder, and in order to minimize the frictional force passing between the needle hook and the pressing wheel, it is best to install it so that it can rotate together actively or passively. However, due to the different diameters of the large needle cylinder and the significantly smaller pinch wheel, the tangential force acting on the needle cannot be completely avoided. Since this pressing wheel must be installed for each knitting system, the pressing wheel also requires considerable space, and the possible system density is particularly limited, that is, the number of knitting systems per inch of the cylinder circumference.

Alternatively, each pointed needle of this circular knitting machine may be provided with a needle press parallel to the needle axis, which presses against the needle hook from outside and closes it during the kulieren. However, there are a large number of pairs of pointed needles and needle pressing parts on the barrel that may cause wear sensitivity again.

Therefore, the present invention is based on the problem of building a circular knitting machine that cooperates with pointed needles instead of latch needles, and with the simplest possible configuration, it has lower wear compared to conventional circular knitting machines with latch needles Sensitivity, especially related to the needle.

The solution to this goal is to use the inventive circular knitting machine as defined in claim 1. Further advantageous specific embodiments can be found in the ancillary items.

The circular knitting machine of the present invention has a needle cylinder rotating around a vertical axis and a sinker ring that rotates together with the needle cylinder. The needle cylinder is provided with a plurality of vertically controllable sharp needles on its outer edge, especially pushable upwards, which has a needle hook with an opening downward as a loop-forming element, and for each sharp needle, supports the surrounding settlement of the loop The blade is held in the radial direction of the barrel and can be displaced horizontally. In addition, for each sharp needle on the barrel, the pressing sinker on the sinker ring remains radially displaceable to close the hook tip of the sharp needle by pressing the needle tip against the needle shaft. The pressing sinkers are each arranged on a ring of sinkers between two adjacent sinkers to save space and have as little clearance as possible or make it as low as possible.

In the circular knitting machine of the present invention, the stitches are formed by the coordinated vertical or horizontal movement of the needle and the corresponding surrounding sinkers for pushing the yarn to the needle shaft. Each surrounding sinker has two horizontal planes in its outline, which face the corresponding needle and have a middle nose protruding towards the needle. The lower plane of the two support planes is the plane on which the knitted fabric lies, while the upper support plane guides the new yarn towards the needle axis and attaches it to it. The vertical distance of these two planes is used to separate the loop head of the old loop on the sinker plane from the new yarn in height, thereby establishing a safety distance so that the hook can be closed when the needle is pulled vertically, so that only the new yarn Can enter the hook.

In addition, the circular knitting machine of the present invention includes another sinker for each needle, that is, a press sinker. The pressing sinker is used to press the needle hook and elastically tighten it when the needle is pulled out. The pressing sinker rotates together with the needle and the surrounding sinker, so that there is no tangential force between the pressing sinker and the needle hook when the needle hook is pressed.

The pressing sinker is guided together with the sinker around the ring of sinker co-rotating with the syringe. Alternating adjacent surrounding sinkers and pressed sinkers are as close as possible to each other, that is, there is the smallest possible clearance. If divider rods are installed between the surrounding sinkers to improve their guidance during ejection and retraction, compressed sinkers can also be installed on these divider rods. The control of pushing and retracting of the surrounding sinker and the pressing sinker are independent of each other.

The outer structure of the circular knitting machine of the present invention is different from the conventional circular knitting machine. On the one hand, a pointed needle is used instead of a tongue needle; on the other hand, a press sinker is additionally inserted in the space between the surrounding sinkers. Therefore, a relatively small additional space is required, especially because, for example, the pressing sinkers are closely arranged between the surrounding sinkers on the partition rod. Such pressing sinkers are generally configured so that there is no lateral clearance between two adjacent sinkers, and due to co-rotation with the needle, there will be no tangential force acting on them during radial ejection against the needle tip. Therefore, this reduces excessive wear on the needle and surrounding sinkers and pressed sinkers of the circular knitting machine of the present invention.

Another advantage of the circular knitting machine of the present invention is that it can be used for the production of knitted fabrics based on both the weft knitting principle and the warp knitting principle. In fact, the circular knitting machine can switch or at least preset these two loop forming technologies. When the needle is in the ejected state, it depends on whether the new yarn is guided from the surrounding sinker only to the needle shaft, or whether the surrounding sinker is pushed beyond the position of the radial needle so that a loop of yarn appears, formed by the machine The coil is produced according to the principle of weft knitting or warp knitting. Although in the case of weft-knitting, the yarn remains tight at the needle shaft before loop formation, in the case of warp-knitting, a yarn loop with less tension is provided. Furthermore, during the loop forming process ("settling"), the yarn tension is lower than during weft knitting.

The circular knitting machine of the present invention may therefore be provided with a control device for controlling the positioning of individual surrounding sinkers, individual pressing sinkers or both sinkers. In this way, the radial displacement of the surrounding sinkers can be controlled such that they direct new yarn to the needle shaft before each retracting the sharp needles, thereby weaving the respective loop forming system. The surrounding sinkers can also be controlled so that they direct new yarn across the needle shaft in the radial direction to provide a loop thereby enabling (warp knitting) knitting at the loop forming systems.

On the one hand, by appropriately controlling the yarn tension, on the other hand, the radial retracting movement of the surrounding sinkers, the circular knitting machine can be operated as a warp knitting machine (as well as properly fixing and adjusting the locks of the surrounding sinkers, According to the invention the machine can also be operated as a circular knitting machine). It can be made to switch between weft knitting and warp knitting as needed, for example, with adjustable sliders that move the surrounding sinkers in the radial direction. With the proper adjustment of the slider to position the surrounding sinkers in the radial direction, the circular knitting machine of the present invention can also generate coils at the same time according to the weft knitting process and the warp knitting process on different systems.

The loop forming system of the circular knitting machine of the present invention can be adjusted or controlled in advance so that each pointed needle forms a loop from the supply yarn loop according to the weft knitting principle or the warp knitting principle, catches the supply yarn or is still in circular motion .

During the catching process, the needles corresponding to the loop forming system are retracted earlier than the weft-knitting or warp-knitting process, so that the pressed sinkers are only available when both the supply yarn and the previous loop have been received in the hook Close the hooks of the pointed needles. Alternatively, the catching process can be achieved by not moving the pressing sinker too close to the hooks of the needles so as to close it, whereby the supply yarn and old stitches in the hooks can be received.

The results show that the circular knitting machine of the present invention has a further advantage of using pointed needles. For example, the needle of a sharp needle is generally smaller than that of a latch needle, making the coil undesirably widened by the needle as a smaller problem. At the same fineness, smaller coils are possible. In addition, the coil will not be damaged by the tongue and its hinge that are opened and closed. Due to the lower strain of the yarn, undesirable effects are generally avoided, such as flattening, excessive sloping tendency, high pile or liner feel varying in height, and yarn twisting during yarn addition (because of smaller needles) .

The use of a pointed needle also allows the speed of the barrel to be increased, because there is no need to ensure absorption of the rotational kinetic energy of the needle tongue.

The use of elastically lockable needles instead of tongues that can be closed via a tongue hinge also reduces the knitting energy of the circular knitting machine and thus the total power consumption.

The cost advantage is mainly due to the fact that the price of the pointed needle is lower than that of the tongue needle; however, the longer life of the needle body is another advantageous cost factor due to the simpler and less fragile structure of the peak needle. When using a pointed needle instead of a latch needle, it is also advantageous to simplify the start of the knitting process after the operation is interrupted; before the knitting starts, the tongue of the latch needle must be checked to see if it is in the correct open or closed state.

In FIGS. 1a to 1h, the loop formation according to the (weft knitting) knitting principle is illustrated on the loop formation system of a circular knitting machine according to the present invention. Figure 1a illustrates the sharp needle 2 in the barrel in an enlarged view. With proper guidance of the control foot 6 in the cylinder lock member 14, the needle is pushed out and removed in the vertical direction. In Figure 1a, the needle is in a pulled-out state. In its hook tip, there is a previously formed "old" loop that has been made into a woven fabric. The needle 2 is now pushed upwards, while the old coil is still on the plane (lower support plane) 3a of the surrounding sinker 3 and is prevented from advancing by the nose 3c of the sinker contour. When the needle 2 has reached its highest position, the surrounding sinker 3 stored on the sinker ring 19 is immediately ejected outward by the control pin 8 in the sinker lock part 10 (to the right of the drawing), reference Figure 1b.

In Fig. 1c, the needle 2 now passes the yarn guide 5 on its rotation path. Then, the surrounding sinker 3 of FIG. 1d protrudes radially inward in the direction of the needle (to the left of the drawing) and protrudes from the sinker 3 above the upper support plane 3b in the direction of the push pin 2 axis The new yarn 1 is pushed onto the shaft.

The needle 2 is then pulled/retracted in FIG. 1e, so that the yarn lying on the support plane 3b above the surrounding sinker 3 is received in the hook. Then, in FIG. 1f, the guide sinker 7 is extended inwardly in the direction of the needle by appropriately guiding its control foot 7 so that it elastically closes the hook by pressure from the outside. At this time, in FIG. 1g, the surrounding sinker 3 is pulled back as far as its upper support plane 3b to release the new yarn 1, however, the needle 2 is simultaneously pulled further downwards, so that the needle hook and the yarn 1 in it are lowered Pull through the old coil still on plane 3a. Subsequently, in FIG. 1h, the pressing sinker 4 is retracted, and the pull-out process of the needle 2 (looping, "Kulierung") is completed, thereby completing the looping process, and can be started again at the position of FIG. 1a.

2a and 2b illustrate two snapshots of the weft-knitting or warp-knitting process in a circular knitting machine according to the present invention. Fig. 2b illustrates the position of the loop-forming element immediately after the needle 2 is pulled out during the knitting process so as to approximately correspond to the position of Fig. 1d (in Figs. 2a and 2b, the needles and sinkers of the machine and Figs. 1a to 1h In slightly different). In Figure 2a, the corresponding snapshot depicts the warp-knitting process. Compared to the weft-knitting process, the surrounding sinker 3 extends further inwards (to the left of the drawing), and thus there is a yarn loop from the needle axis to the upper support plane 3b. Although in the weaving process of Fig. 2b the yarn is maintained at a uniform tension as continuously as possible by suitable means (for example, an appropriate yarn feeder) in order to make a woven fabric of good quality, the yarn tension is warp-knitted in Fig. 2a The process can be lower and can be changed. By further advancing the surrounding sinkers to provide yarn loops, a safe loop forming process can be ensured.

In both cases of the warp knitting process of FIG. 2a and the weft knitting process of FIG. 2b, in the subsequent steps, the needle hook is closed by the pressing sinker 4, the needle 2 is removed and the new yarn 1 on the needle shaft or provided The yarn loops are therefore received to be subsequently pulled through the old loops.

The circular knitting machine of the present invention is therefore suitable for both weft knitting and warp knitting. In fact, the machine may have an actuator 15 on the sinker lock 9, and the sinker lock part 10 may be displaced with it, whereby the length of the surrounding sinker 3 ejection path can be Switch between shorter weft knitting paths. The sinker lock 9 is fixed to the sinker lock support ring 12 with screws.

Due to the option to switch between the weft-knitting function and the warp-knitting function, the circular knitting machine of the present invention allows effective and safe processing of various yarns. In particular, the warp-knitting function allows the use of more sensitive yarns because of the lower yarn tension during the process. In fact, the loop formation of the warp-knitting process of Fig. 2a takes place in two steps: providing the yarn loop and pulling the provided yarn loop through the old loop. In the first step, the yarn tension of the yarn loop is first increased from the friction point to the friction point due to the rope friction principle, and then, when the yarn loop appears, it returns to zero. In the second step, when the yarn loop is pulled through the old loop, the yarn sections of the yarn loop and the old loop rub against each other again, thereby increasing the yarn tension again.

In contrast, during weft knitting, the feeding of new yarn through the yarn guide and the pulling of the yarn through the old loop are performed simultaneously, thereby accumulating the corresponding yarn friction and producing a significantly higher yarn tension together. Due to the time offset of these two processing steps, the increase in yarn force does not occur during warp knitting, whereby the maximum value of yarn tension appears to be lower. The warp-knitting process is therefore more protective of the yarn to be processed and the loop-forming elements of the circular knitting machine.

The appearance of the yarn loop in the warp knitting process also has the advantage of alleviating the loop forming part in the cylinder lock. The looping angle therein is not as steep as that of weft knitting, thus reducing the load on the needle being guided in the looping component. The use of simpler loop-forming components can avoid needle breakage and needle breakage.

In order to make the pattern possible, it should also be possible to adjust the weft-knitting or warp-knitting system of the circular knitting machine that can be used for weft-knitting and warp-knitting for circular running and capturing.

During the circular movement, by properly controlling the lock and not being fully pushed out, the needle 2 simply remains in its circular movement position. The new yarn 1 is not even received by the hook.

Figure 3a illustrates the position of the knitting system during the capturing process, more precisely, during the withdrawal of the needle 2. After the needle 2 has been fired far enough so that it can receive the new yarn 1, both the new yarn 1 and the old stitch are still in the hook when retracted.

By withdrawing the needle or displacing the appropriate control of the sinker 4, the capture process can be controlled. Therefore, the earlier retraction of the adjustable needle 2 causes the pressing sinker 4 to close the needle hook only when the needle hook has passed through the old stitch lying on the plane 3a (and therefore already in the needle hook).

Figure 3b illustrates the needle movement curves of the weft-knitting process and the capturing process side by side. When the solid line 16 represents the needle movement along the timeline during the weft-knitting process, the dashed line 17 illustrates the needle 2 being retracted earlier during the capturing process.

Another possibility to implement the catching process with the circular knitting machine of the present invention is to press the sinker 4 that does not fully extend on the selected knitting system to close the needle hook, but to maintain it in the retracted position without pressure contact with the needle hook. For example, by appropriately adjusting the sinker lock on each system, the corresponding control of pressing the sinker 4 is completed.

Fig. 4a illustrates a side perspective view of the syringe 11 (in the variant shown here, the sinker lock 9 is integrated with the sinker lock part 10). In Fig. 4b, the section with the yarn guide 5 in the knitting system is shown in detail. In these two figures, the sharp needles 2 arranged on the entire circumference of the barrel 11 are shown only in the circumference of the barrel for clarity. These drawings, especially FIG. 4b, not only show the needle 2 and the surrounding sinker 3 and the pressed sinker 4, but also show the yarn guide 5 that belongs to the knitting portion in the selected portion of the barrel edge. The surrounding sinker 3 is arranged on the sinker guide on the cylinder from the sinker ring 19 from the outside to the inside between the needles 2. The pressing sinkers 4 are each arranged substantially without any gap between two adjacent sinkers 3 (also refer to FIG. 5) so as to directly face the corresponding sharp pins. The sharp needle is also arranged between the surrounding sinkers that extend toward the sinker guide to the board guide, so that the surrounding sinkers serve as guides for both the pressing sinker and the needle.

As shown in FIG. 5, pressing the sinker 4 requires a small amount of additional space because, even under conventional circular knitting machines that use tongue needles but do not press the sinker, the surrounding sinkers 3 are spaced apart from each other (so that the needle They can be guided through the needle when pushed out). In this conventional knitting machine, the separating rod 18 is usually provided on the sinker ring 19 in the space between the surrounding sinkers 3 to avoid the clearance between the surrounding sinkers 3. The modification of this machine is the circular knitting machine of the present invention. By arranging and pressing the sinker 4 on the separating rod 18, it is reasonable to make the adjacent surrounding sinker 3 have as little clearance as possible. Alternatively, each surrounding sinker and pressed sinker may also share the groove defined by the corresponding partition rod. However, this has the following disadvantages: in view of the high fineness, the divider rod should be as thin as possible, which means that the divider rod has an increased risk of rupture.

Just as the pin 6 penetrates the pointed needle 2 through the groove properly preset as the lock during rotation, the surrounding sinker 3 and the pressed sinker 4 each also have a sink that is guided in the corresponding groove of the sinker lock part 10 Feet 7 and 8. With proper presetting of needle locks and sinker locks, each knitting system can be adjusted as necessary to form loops based on the weft-knitting principle or the warp-knitting principle, only catching new yarn or still in circular motion. In FIGS. 4a and 4b, the actuator 15 used on the sinker lock with integrated sinker lock member performs the switching between the weft knitting and warp knitting functions.

The space-saving configuration of the pressing sinker 4 between the surrounding sinkers 3 allows the relatively high precision of the circular knitting machine, that is, there are a large number of needles per inch of the circumference of the cylinder. Another advantage of this space-saving configuration is that a large number of knitting systems can also be arranged along the circumference of the cylinder. Therefore, more than 88 knitting systems can be installed on a circular knitting machine with a cylinder circumference of 30 inches, which corresponds to a high system density of 2.9 systems per inch (it is also possible to reach a higher 3.2 System density).

Figure 6 illustrates another possible simplification of using a two-piece needle in a circular knitting machine. This one-piece two-point needle has an upper needle part 2'and a lower control foot part 6'. The pointed needle part 2'extends from the needle hook at the upper end along the needle axis to the nose protruding to the side, while the control foot part 6'has a similar gap to receive the recess of the nose and is provided in the corresponding cylinder lock part for receiving And the outline required for guidance. Then, it is better to form the needle part 2'by simply forming a metal wire, which is bent toward the hook at the upper end and toward the nose at the lower end, however, another method such as stamping a metal sheet part may be used to control the foot part 6 '. The nose of the needle part 2'and the recess of the control foot part 6'are engaged with each other, but it is not limited to forms other than this fitting function; in particular, the recess of the control foot part does not need to have a slot or slit shape.

The use of a two-piece needle can also produce further cost advantages, as long as the more cost-effective needle part 2'in the needle must be replaced after wear. Depending on the choice of needle component manufacturing process, the complete needle equipment of the circular knitting machine can be more cost-effective. Dividing the needle into two parts, inserting the pressing sinker 3 between the surrounding sinkers 4 as needed, also allowing even easier to convert the circular knitting machine with warp knitting function to the conventional circular knitting machine, and vice versa Ran.

Alternatively, based on the principle of so-called relative technology, the present invention can also be applied to circular knitting machines. In such machines, the surrounding sinkers are stored in the upper half of the barrel between the needles. Therefore, this type of machine does not require a separate sinker ring. The surrounding sinkers can be controlled vertically in height and at the same time perform a pivoting movement around the pivot point. This pivoting movement replaces the horizontal movement of sinkers around the conventional knowledge. Like the pressing element for closing the needle hook, a pressing wheel (one for each loop forming system) arranged outside the circumference of the barrel can be used here.

The structure of the circular knitting machine of the present invention is based on the further development of the conventional circular knitting machine. The circular knitting machine of the present invention can be manufactured as a stand-alone machine; however, it is also conceivable, for example, to expand the conventional circular knitting machine by simply adding a pressing sinker to the already existing gap between the surrounding sinkers and using a sharp The needle replaces the tongue needle or the needle part corresponding to the two-piece tongue needle and the pointed needle.

In any case, the present invention provides significant advantages related to the problem of needle wear. In addition, the machine according to the invention allows the selection of weft-knitting and warp-knitting to be a loop forming technology within a single machine.

1: yarn 2: needle 2’: Needle parts 3: Surrounding sinkers 3a: lower support plane 3b: upper support plane 3c: Nose around the outline of the sinker 4: Suppress the sinker 5: Yarn guide 6: Pin control pin 6': Control foot parts 7: Control foot for suppressing sinker 8: Control feet of surrounding sinkers 9: sinker lock 10: Sink lock components 11: Syringe 12: Sink lock support ring 13: cylinder lock 14: cylinder lock parts 15: Actuators for weft/warp knitting 16: Braided curve 17: Capture the curve 18: divider rod 19: Sink ring

The following describes a specific embodiment and further advantages and details of the present invention with reference to the drawings.

FIGS. 1a to 1h (with an enlarged view of FIG. 1a) illustrate the sequence of a loop forming method according to the (weft knitting) knitting principle in a circular knitting machine according to the present invention.

Figures 2a and 2b each illustrate different positions of the loop forming element before the needle is pulled out during warp knitting and weft knitting of a circular knitting machine according to the present invention.

Fig. 3a illustrates the position of the loop-forming element during the pulling/retracting of the needle during the capturing process, while Fig. 3b illustrates the needle movement curve during the capturing process.

Fig. 4a is a close-up perspective view showing the edge of the barrel with a needle and the corresponding surrounding sinker and pressed sinker and corresponding sinker lock (compared to the circular knitting of Figs. 2a and 2b, the sinker lock and sinker The lock part is integrated in this case). Figure 4b illustrates a detailed view of the weft-knitting or warp-knitting system of Figure 4a.

Fig. 5 shows a cross-sectional view of the sinker ring and the surrounding sinkers and pressed sinkers supported on the ring in a parallel section parallel to the tangent direction on the barrel.

Fig. 6 illustrates in two views a variation of a two-piece pointed needle that can be used in a circular knitting machine, one illustrating two needle parts separated from each other, and the other illustrating two needle parts in a composite state.

1: yarn

2: needle

3: Surrounding sinkers

3a: lower support plane

3b: upper support plane

3c: Nose around the outline of the sinker

4: Suppress the sinker

6: Pin control pin

10: Sink lock components

11: Syringe

19: Sink ring

Claims (14)

A circular knitting machine comprising a needle cylinder rotating around a vertical axis and a sinker ring rotating together with the needle cylinder, Among them, the needle cylinder has a plurality of vertically controllable sharp needles on its outer edge portion, and the sharp needles have a plurality of hooks with openings downward as loop-forming elements, Among them, for each sharp needle on the needle cylinder, a surrounding sinker supporting the loop is kept radially movable on the sinker ring, Among them, for each sharp needle on the barrel, in order to allow the hooks of the sharp needle to be closed by pressing the needle shaft, a pressing sinker is kept on the sinker ring as Radially movable, with Among them, the pressing sinkers are respectively arranged between two adjacent sinkers. If the circular knitting machine of claim 1, Among them, the pressed sinkers on the sinker ring are arranged between the adjacent sinkers on both sides with substantially no clearance. If the circular knitting machine of claim 1 or 2, Wherein, the pressing sinkers are respectively guided on the ring of sinkers on several partition rods, and the partition rods extend between adjacent surrounding sinkers. The circular knitting machine as described in any one of claims 1 to 3, Among them, the peripheral sinkers have two horizontal support planes in their side profile facing the needle and a middle nose projecting in the radial direction. The circular knitting machine according to any one of claims 1 to 4, further comprising: a control device for controlling the radial displacement of the individual surrounding sinkers and/or the individual pressing sinkers . If the circular knitting machine of claim 5, Among them, the control device is designed to control the radial displacement of one or more selected surrounding sinkers or all surrounding sinkers, so as to guide the new yarn towards the needle axis before retracting the respective sharp needles, so that the Pointed needles can form several loops of a weft knitted fabric. If the circular knitting machine of claim 5, Wherein, the control device is designed to control the radial displacement of one or more selected surrounding sinkers or all surrounding sinkers, so as to guide the new yarn to cross the needle shaft before retracting the respective sharp needles in a radial direction Thus, a yarn loop is provided, so that the pointed needle can form several loops of a warp knitted fabric. The circular knitting machine according to any one of claims 1 to 7, further comprising a plurality of yarn feeders, Among them, the needles cooperating in a joint loop of supplying yarn each form a loop forming system, and Among them, each loop forming system can be adjusted in advance so that its pointed needle forms a loop according to the weft knitting principle or the warp knitting principle. If the circular knitting machine of claim 8, it further includes: a sinker lock for guiding the surrounding sinkers and the control feet of the pressing sinkers, Among them, the sinker lock can be changed, whereby the coils of the loop forming system are formed according to the weft-knitting principle or the warp-knitting principle. The circular knitting machine according to any one of claims 1 to 9, further comprising a plurality of yarn feeders, Among them, the needles cooperating in a joint loop of supplying yarn each form a loop forming system, and Among them, each loop forming system can be adjusted in advance so that its pointed needle forms several loops, catches the supply yarn, or is still in circular motion. The circular knitting machine according to any one of claims 8 to 10 further includes a control device for controlling each loop forming system so that its pointed needle forms a coil according to the weft knitting principle or the warp knitting principle , Or catch the supply yarn, or still in circular motion. If the circular knitting machine of any one of claims 8 to 10, Among them, the pointed needles of the loop forming system that performs one of the catching processes are retracted earlier than the loop forming process, so that the pressing is only performed when both the supply yarn and the previous stitch have been received in the hook The sinker closes the hooks of the respective pointed needles. If the circular knitting machine of any one of claims 8 to 10, Among them, the pressed sinkers belonging to the pointed needles of one of the looping systems performing the catching process do not move close enough to each needle hook to close it, so that both the supply yarn and the previous loop are received by the needle Inside the hook. The circular knitting machine as described in any one of claims 1 to 13, Wherein the pointed needle includes an upper needle part and a control leg part, the upper needle part has a nose protruding to one side, and the control leg part has a concave part that can receive the nose part of the upper needle part.

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