EA045893B1 - KETTELING MACHINE WITH AN IMPROVED GUIDE FOR ALIGNING THE EDGES OF TWO CONNECTED KNITTED PARTS - Google Patents

Description

Technical field of the invention

The present invention relates to a quilting machine equipped with an improved guide for aligning the edges of the fabrics of two pieces of knitwear, such as, for example, a collar and a sweater.

BACKGROUND OF THE INVENTION

As you know, kettle is a technological process used in the textile industry, which consists of joining together or sewing the edges of the fabrics of two parts of a knitted product. For example, this processing is used to join collars, cuffs and sleeves to the rest of the garment to create a finished garment.

The joining of the edges of the fabrics is carried out by grabbing loop by loop and stitching stitch by stitch together the edges of the fabrics of two parts of the knitted product. The connecting thread fastens or joins together the finite rows of edges of the fabrics of two parts of a knitted product, thereby forming a continuous seam. The connection made in this way is very even, smooth and almost invisible.

The pickling operation is a process with significant limitations:

it is slow and expensive; in this regard, according to experts, it accounts for more than 70% of the total time spent on the production of a garment;

currently known ketching machines are difficult to adapt; in practice, changing the fineness of the knitted fabric requires adjusting the machine settings and, therefore, the time spent reconfiguring the machine negatively affects its productivity;

the operator responsible for the pickling process must have extensive experience and knowledge in order to minimize errors and achieve a certain speed in the work; as a rule, the required skills are acquired by the operator only after several months of practice;

One of the main problems faced by those working in this sector is excessive eye strain due to the regime of pickling; such strain, especially if prolonged, can lead to progressive deterioration of the operator's vision.

For these reasons, the development of a quilting machine capable of autonomously determining where to place stitches, in addition to the benefits of speed, cost and accuracy of operation, would improve the working conditions of those who use the machine, thereby making the quilting process less complex and helping to prevent accidents at work. workplace.

In fig. Figure 1 shows a traditional kettling machine. This is a circular knitting machine, on the threads or needles of which the operator places the edges (loops on the open ends) of two knitted parts to be joined. The machine then passes the yarn through the loops of the pre-installed knitted pieces and, as a result, joins or kettles their edges.

The prior art also includes examples of automatic or semi-automatic knitting machines, the purpose of which is to solve at least part of the above-mentioned disadvantages of manual machines.

However, these machines are also not without drawbacks that prevent or limit their proper functioning.

For example, the joined parts or edges of the fabrics of knitted parts, such as collars and sweaters, must be correctly placed in the stitching or knitting area, i.e. onto the needle of a quilting machine to join the edges of the fabric parts of the product in a way that is both fast and precise.

If the edges of the knitted fabrics are not placed and aligned properly in line with the needle, the knitting operation cannot be carried out correctly.

Prior art solutions do not automatically align edges or edges of knitted fabrics in a manner that is accurate and consistent over time, so this operation is typically left to operators with the appropriate experience and skill to perform it manually.

However, if the operator lacks the required qualifications, the speed and efficiency of the pickling operation are lost and the repeatability and consistency of the quality of the pickling operation are not guaranteed. The solutions disclosed in EP 3733945 A1, JP H0691073 A and US 2035365 A are known from the prior art.

Brief Disclosure of the Present Invention

Thus, there is a need to overcome the above-mentioned disadvantages and limitations inherent in the prior art.

In particular, there is a need to provide a guide that will assist the operator in positioning the knitted pieces, such as, for example, the knitted piece 6 and collar 1, 10, correctly aligned for skewering by the machine in an accurate, fast and repeatable manner.

The need to overcome the disadvantages and limitations of solutions of the prior art is satisfied with the help of a ketching machine according to independent claim 1 of the claims.

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Brief description of drawing figures

Additional features and advantages of the present invention will become more apparent from the following description of preferred non-limiting embodiments thereof, in which:

in fig. 1a shows a view of a traditional manual ketching machine;

in fig. 1b is a general view of a knitting machine suitable for use in conjunction with a guide for positioning the edges of knitted fabrics in accordance with the present invention;

in fig. 2 shows an approximate diagram of the connection of a piece of knitwear and a bent or folded collar to form a sweater;

in fig. 3 shows a view of the collar, which should be folded in half and connected to a piece of knitwear;

in fig. Figure 4 shows a view of a piece of knitted product to which the collar must be attached by means of a pintle;

in fig. 5 shows a view of the collar in a standing position, connected to a piece of knitwear;

in fig. 6 shows a view of the sweater with the collar folded back after joining the pieces together;

in fig. 7 shows a view of the sweater with the collar in a standing position after joining the parts together;

in fig. 8 shows a view of the feed guide installed on the ketching machine;

in fig. 9 shows a view of a part of the feed guide connected to the ketching machine;

in fig. 10 shows a view of the guide with a bent collar, assembled and ready for processing;

in fig. 11 shows a view of the guide with details of the position of the gate folded in half in relation to the guide;

in fig. 12 shows a view of a folded collar mounted in a guide, in the open state, so that a piece of knitwear can be inserted into it;

in fig. 13 shows a view of the plates for unfolding the fabric of a knitted item, which are an integral part of the guide;

in fig. 14 shows a view of the guide with a collar and a piece of knitted product, assembled and ready for processing;

in fig. Figure 15 shows a view of the guide components removed from the knitting machine.

Components or parts of components common to the embodiments of the invention described below are designated by the same reference numerals.

Detailed Description of the Invention

In the above and attached figures, reference numeral 104 generally indicates a general schematic view of a ketching machine in accordance with the present invention.

The knitting machine 104 includes a stationary block containing a support frame 108, a feeder 116 of the knitted article in the longitudinal direction or along the Y-Y axis, and a movable block 200 supported by said stationary block or support frame 108, configured to move and appropriately drive the needle. 110 for the operation of joining or kettling parts of a knitted product or fabrics of parts of a knitted product.

The moving block 200 includes a device for positioning 120 of the needle 110 in the transverse direction or along the X-X axis, which is perpendicular to the specified longitudinal direction or Y-Y axis and is in the same plane with the knitted article, and a device for driving 124 of the specified needle 110 in the vertical direction or along the Z-Z axis perpendicular to the specified longitudinal direction Y-Y and transverse direction X-X, to perform stitching or knitting of knitted parts.

The knitted piece feeder 116 includes a knitted piece fixing means 128 configured to hold the piece pressed against the knitted piece feeder 116.

According to a possible embodiment of the invention, said knitted piece fixing means 128 comprises a hinge support (foot) 136 with two rotations (directions of movement) capable of uniformly pressing the knitted piece even if it has a non-uniform thickness.

Preferably, said knit piece fixing means 128 is adjustable to set the pressure of the tab 136 on the knit piece itself.

The knitted item feeder 116 includes an electric motor 130.

The positioning device 120 of the needle 110 includes a motor 130 coupled to a roller screw or ball screw 201, in turn coupled to a moving block 200 that linearly moves the needle 110 in the lateral direction X-X.

The driving device 124 of the needle 110 includes an electric motor 130 connected to the needle 110 by a crank mechanism to perform a reciprocating stitching movement of the needle 110.

The needle 110 preferably passes through a special plate with a hole for the needle 110, which

- 2 045893 limits its deformation and ensures better stitching of knitted parts.

The knitted piece is pre-equipped with a guide thread, which is inserted into the knitted piece and routed to define a plurality of segments.

A guide thread is used, preferably made of a fluorescent material so that it can be easily recognized or detected by a suitable optical system or camera 203. For this purpose, the quilting machine 104 is provided with an ultraviolet light illumination system with LEDs 152 to illuminate said fluorescent guide thread.

In accordance with an embodiment of the invention, said ultraviolet light illumination system 152 is mounted on the fixing means 128 of the knitted article.

Preferably, said guide thread 140 is made of a water-soluble or heat-soluble material so that it can be dissolved or disposed of when the knitted product is subsequently washed without resorting to manual removal or removal of the thread.

Advantageously, the knitting machine 104 includes a camera 203 suitable for detecting the guide thread. The knitting machine 104 is additionally equipped with a control unit 156, which during operation is connected or functionally connected to the camera 203 and the drives/electric motors 130 of the knitted product feeder 116, the positioning device 120 of the needle 110 and the driving device 124 of the needle 110.

Thus, the control unit 156 can determine in real time the target position of the needle 110 depending on the guide thread and control in real time the knitted piece feeder 116, the positioning device 120 of the needle 110, and the driving device 124 of the needle 110 to achieve the specified target position. stitching needle 110.

In particular, the knitted item feeder 116 and/or the needle 110 positioning device 120 and/or the needle 110 actuator 124 comprise corresponding motors 130 with real-time feedback via said control unit 156, depending on the target position of the needle 110 .

At least one of the knitted item feeding device 116, the needle 110 positioning device 120, and the needle 110 driving device 124 includes corresponding real-time feedback motors 130; preferably, at least two of said devices 116, 120, 124 include respective real-time feedback motors 130 and, even more preferably, all devices 116, 120, 124 include respective real-time feedback motors 130.

As already mentioned, the knitting machine 104 is configured or intended in the said configuration to perform the knitting of two separate parts of a knitted product.

In the further discussion of the essence and advantages of the invention, the connection of the collar 1, 10 (Fig. 3 and 5) and the details of the knitted product 6 (Fig. 4) is considered as an example.

For the quilting operation of said two knitted fabrics, for example, the collar 1, 10 and the knitted piece 6, the quilting machine preferably includes a feed guide 20 for the collar 1, 10 and the knitted piece 6, which aligns the fabrics in the place where the collar is to be sewn 1, 10 to knitted item 6.

As follows from the above and below, the guide 20 is intended for aligning two or more knitted fabrics.

In the case of a folded or bent collar 1 and a piece of knitted product 6, it is desirable to align the seam line 13, which will be made on the end row 4 of the collar 1, with the edge of the neckline 7 of the piece of knitted product 6 so that the connection of the folded collar 1 with the piece of the knitted product 6 satisfied the specified quality criteria, i.e. while maintaining the seam line 13, identical to that obtained on a traditional kettle machine (as shown in Fig. 1). In other words, the standards or values (a) and (b) in Figure 2 must be respected, as explained below. The guide 20, in addition, must be adapted to correctly and accurately align the end row 4 of the gate, along which the seam line 13 will be made, with the upper end of the gate 5, if the gate being connected is a folded two gate 1.

In the further discussion of the essence and advantages of the invention, the connection or skewering of a double-folded collar 1 to a piece of knitted product 6 (the so-called pocket skewering) is disclosed as an example, since the connection of a standing or single, non-double-folded collar 10 is a simpler operation than the corresponding operation on a folded gate 1.

In particular, the folded or bent collar 1 is a trim or edge trim of the knitted fabric, closed in a loop containing a waste part called a separating cotton fabric (separating strip of cotton fabric) 3. The said separating cotton fabric 3 is also provided in the case of a single collar 10 and has a configuration similar to the looped edge trim of a knitted fabric.

The knitted item 6 is initially devoid of collar 1, 10.

The connection of a piece of knitted product 6 and a single 10 or doubled 1 collar forms a sweater, which can be a sweater with a double collar 11 or a sweater with a single

- 3 045893 gate 12, respectively.

The neck opening 7 of the knitted article 6 in the area where the collar 1, 10 is to be attached presents various situations that are difficult to handle.

For example, along the neckline 7, the knitted fabric has portions folded to the outside 14 of the jersey 6 and sometimes to the inside 15 of the jersey 6. In addition, on the shoulders 16 of the jersey 6 there are two seams or joints that change the thickness of the knit, such thus forming areas of a different thickness 16. In general, the edge of the neck opening 7 of the knitted product 6, where the collar 1, 10 is to be attached, is quite uneven, since it has areas turned outward 14 and inward 15, as well as areas of different thickness 16.

For these reasons, it is extremely difficult to handle or manipulate the knitted piece to properly and accurately align with the collar 1, 10.

As a result, to control the neckline 7 of the knitted product 6, where the collar 1 is attached, it is necessary:

unfold the edge of the neckline 7 in the place where it bends, bring the edge of the neckline 7 of the knitted item 6 to the desired point, so as to position the edge of the neckline 7 in a given and constant position, despite all its irregularities.

This can advantageously be realized using the feed guide 20.

As described, the knitted items are transported using a belt and roller screw drive system that forms the feeder 116; Advantageously, the feed guide 20 is located at the beginning of said feed device 116.

The feed guide 20 includes a pin 31 for opening or opening the collar 1, 10 and allowing the fabric of the knitted item 6 to be inserted.

The feed guide 20 contains a first stop 21, suitable as a stop and for positioning the separating cotton sheet 3 of the gate 1, 10.

In addition, the feed guide 20 includes a first toothed or needle disk 28 for pushing and holding the separating cotton sheet 3 of the gate 1, 10 against said adjustable first stop 21. The first toothed or needle disk 28 peripherally includes a plurality of teeth or needles for engaging and pulling knitted fabric. Preferably, the first toothed or needle disk 28 is rotatable, that is, it can be tilted or rotated about an axis of rotation that is parallel to said vertical (Z-Z) direction.

The feed guide 20 additionally contains a lower stop 22 configured to interact with the lower edge 27 of the gate 1.

The feed guide 20 contains profiled plates 33 for unfolding the neckline 7 of the knitted item 6. In particular, these profiled plates 33 interact with the unfolding system 32 of the neckline 7 of the knitted item 6.

The feed guide 20 is also equipped with a system 35 for adjusting the pressure of the profiled plates 33.

In addition, the feed guide 20 contains an adjustable second limiter 23 for changing the value (b) (see Fig. 2) of the knitted item 6 sewn inside the folded collar 1.

Moreover, the feed guide 20 includes a second toothed or needle disk 29 for holding and pressing against the stop the lower edge 27 of the folded collar 1 and for holding the knitted article 6 against said second adjustable stop 23. The second toothed or needle disk 29 peripherally includes many teeth or needles for hooking and pulling the knitted fabric. Preferably, said second toothed or needle disk 29 is rotatable, i.e. it can tilt or rotate around an axis of rotation parallel to the specified vertical direction (Z-Z).

Ideally, the alignment that must be obtained between the jersey piece 6 and the collar 1 can be explained in a simplified manner and shown schematically using FIG. 2, which illustrates the parameters or quantity (b), called the amount of fabric of the knitted article placed inside the collar, and the quantity (a), called the distance from the seam line 13 to the inner edge 5 of the collar 1, also called the upper end 5 of the collar 1.

The amount of fabric of the knitted product placed inside the collar b can be adjusted using the second limiter 23 of the feed guide 20.

The value (a), called the distance from the seam line 13 to the inner edge 5 of the gate 1, is adjusted using the first limiter 21 of the feed guide 20.

Thus, the numerical values or quantities (a) and (b) shown in FIG. 2 can be changed using adjustable limiters 21, 23 and according to the needs of the user.

The various steps involved in joining or knitting the folded collar 1 to the knitted piece 6 are now described in order to properly characterize the feed guide 20 and its essential elements that allow the knitted fabrics to be controlled and properly aligned.

First of all, gate 1 in configuration 25, already folded in half, is installed in the cage ma

- 4 045893 tire 104 (Fig. 10) so that part of the separating cotton fabric 3 faces upward.

As a result, the upper or outer edge 26 and the lower or inner edge 27 of the gate 1 are identified or respectively determined.

The gate 1 will be pulled by the transport system or feeder 116, and the feed guide 20 will ensure that the upper edge 26 and the bottom edge 27 of the gate 1 are aligned in the required position in accordance with the specified characteristics, that is, subject to the values of a distance from the seam line 13 to the inner edge 5 gate 1 and b of the amount of fabric of the knitted product placed inside the gate, schematically shown in FIG. 2.

This alignment is carried out by two systems acting separately on the upper edge 26 and the lower edge 27 of gate 1.

Specifically, at the top or outer edge 26, the release cotton web 3 is abutted against an adjustable first stop 21 by a first toothed or needle disk 28 oriented to press the release cotton sheet 3 against the horizontally adjustable first stop 21. Adjusting the inclination of the first tooth or needle disk 28 changes the force with which it presses the separating cotton sheet 3 against the first stop 21, regardless of whether such first toothed or needle disk 28 is connected or not connected to the electric motor. When the horizontal position of the first stop 21 is changed, the alignment of the upper edge 26 of the gate 1 with respect to its lower edge 27 changes horizontally, thereby changing the value (a), i.e. distance from seam line 13 to inner edge 5 of collar 1.

In the same way, the bottom edge 27 or collar edge, which is on the inside (wrong) side of the jersey piece 6, abuts the bottom stop 22 by means of a second toothed or needle disk 29. Said bottom stop 22 can remain stationary while the slope the second toothed or needle disk 29 is adjustable, as explained. When the inclination of the second toothed or needle disk 29 changes, the axial feed force of the second toothed or needle disk 29 changes relative to the lower edge of the neck cutout 27 in the direction towards the lower stop 22.

By means of these two systems, comprising adjustable stops 21, 22 and toothed or needle discs 28, 29, perfect alignment of the upper edge 26 and the lower edge 27 of gate 1 is achieved in order to obtain a seam line having dimension (a), i.e. . the distance from the seam line 13 to the inner edge 5 of gate 1, which is predetermined and constant along the entire seam line 13.

While aligning the upper or outer edge 26 and the lower or inner edge 27 of the gate 1 in compliance with the above value (a), i.e. distance from the seam line 13 to the inner edge 5 of collar 1, it is necessary to insert a piece of knitted product 6 in an unfolded form and place it in the required position by the amount (b), i.e. the amount of fabric of the knitted item 6 placed inside the collar 1 before proceeding to the final stitching or knitting.

To do this, it is necessary to provide an opening or passage 30 between the upper edge 26 and the lower edge 27 of the gate 1 folded in half.

This opening 30 is accomplished by said feed guide pin 31 20, which holds the upper edge 26 of the gate 1 raised until it comes into contact with the first needle of the disc 28.

Said first needle disk 28 serves the dual purpose of preventing the upper edge 26 of the gate 1 from falling off the pin 31, and also pulling and holding the separating cotton sheet 3 of the gate 1 flush against the first adjustable stop 21.

Into said opening 30 between the upper edge 26 and the lower edge 27 of the collar 1, the operator inserts the knitted item 6 using the feed guide 20.

To control the neckline 7 of the knitted product 6, as stated above, a unfolding system 32 is used, consisting of two profiled plates 33 with adjustable pressing them against each other, a second limiter 23, adjustable horizontally, and a second toothed or needle disk 29, designed to pull out and hold the edge of the neckline 7 on the second stop 23.

Once the jersey piece 6 has been inserted (FIG. 14), suitably shaped unwinding plates 33 (FIG. 13) unroll the edge of the neckline 7, whether it is rolled up or down. Preferably, said profiled plates 33 have a contact edge, preferably having a wavy sinusoidal profile.

The neckline 7 of the knitted product 6 after unfolding is held on the second stopper 23 by the second needle disk 29.

After the neckline 7 of the knitted product 6 has been unfolded and inserted to the required amount (b) using the second stopper 23 inside the folded collar 1, the opening 30 of the collar 1 must be closed on both the upper edge 26 and the lower edge 27 of the collar 1 pressure must be applied to prevent the neckline 7 of the jersey piece 6 from twisting again or losing the position in which it was inserted into the collar 1.

The closing of the opening 30 of the gate 1 is carried out using the first needle disk 28: as soon as the upper edge 26 of the gate 1 comes into contact with the pin 31, which serves to hold

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Claims (13)

pressing the upper edge 26 of the collar 1 up, the first needle disc 28 pushes this upper edge 26 of the collar 1 downwards, holding it flush against the first stop 21 to bring it into contact with the knitted piece 6 clamped between the upper edge 26 and the lower edge 27 of the collar 1. Immediately after the knitted fabric is aligned, as shown in FIG. 2, in accordance with the specified values (a) and (b), it is inserted under the fabric fixing means 128 and, in particular, under the foot 136 of the ketching machine 104, for subsequent automatic stitching. As for the connection of the single collar 10 and the knitted item 6, the feed guide 20 is the same, with the difference that the single collar 10 does not require bending and only the upper edge 26 of the folded collar 1 remains. In this case, the lower stop 22 for the lower edge of 27 gate 1 remains unused. The rest of the feed guide 20 remains in operation as before. Thus, the connection of a single collar 10 and a piece of knitted product 6 is a simplified version of the connection of a double-folded collar 1 and a piece of knitted product 6, as described above. As can be understood from all that has been described, the present invention overcomes the disadvantages of the prior art. In essence, the kettle machine of the present invention is an automatic machine that is completely innovative in the way it performs kettle knives compared to the known manual kettle machine. In fact, by having a feed guide at the start of the process, the quilting machine will eventually be limited to identifying and making, preferably with a camera, stitching points on the folded or single collar to secure it to the pre-positioned knit piece using the guide. In other words, the present invention relates to a feed guide which, when coupled to a system for feeding or advancing knitted fabrics (i.e. the knitted fabric part and the double fold or single collar), helps the operator to feed the fabrics in the correct position onto the machine and especially for camera installed on the car. In this way, the machine will be able to automatically proceed with the subsequent pickling operation, i.e. mutual connection of the specified cloths, correctly located and presented on the needle for connection. The solution of the present invention allows for the modernization of the squatting operation by eliminating the limitations of existing technology, increasing productivity, improving the quality of the processed webs, reducing processing costs and improving the working conditions of the workers involved in staking. Essentially, the knitting machine can be used by an untrained operator who simply has to position the knitted pieces at the base of the needle and operate the knitting machine according to commands. Thus, the ease of use of the knitting machine for knitting knitted fabrics reduces personnel training time to almost zero. Moreover, the ketching machine of the present invention is easily adaptable. The processing speed of the quilting machine of the present invention is much higher than that of a manual machine; its speed can easily exceed 700 stitches per minute. The pickling operation in accordance with the present invention is much cheaper and simpler to perform, while at the same time its implementation increases productivity and reduces processing time. The quilting machine of the present invention resolves all the disadvantages associated with the health of the operator that occur during manual quilting. Those skilled in the art can make several changes and adjustments to the above-described kettle machine and kettle methods to suit specific and individual needs, all of which fall within the scope of protection defined in the following claims. CLAIM 1. Kettelny machine (104), containing: a fixed block containing a support frame (108), and a movable block (200) containing: a knitted piece feeder (116) for advancing or transporting the knitted piece in the longitudinal (Y-Y) direction; a device for positioning (120) a needle (110) in the transverse direction (X-X), which is perpendicular to said longitudinal direction (Y-Y) and located in the same plane with the knitted product, a device for actuating (124) said needle (110) in a vertical direction ( Z-Z), perpendicular to the specified longitudinal (Y-Y) and transverse (X-X) directions, to perform pickling, characterized in that - 6 045893 knitting machine (104) contains a feed guide (20) for two knitted parts to be joined, such as a collar (1, 10) equipped with a separating cotton fabric (3), and a knitted part (6), installed in front of said needle (110) relative to the feed direction in the longitudinal direction (Y-Y), wherein the feed guide (20) comprises: a first stop (21) suitable for restraining and positioning the separating cotton sheet (3) of the gate (1, 10), wherein said first stop (21) is adjustable in position along said transverse direction (X-X) so as to have ability to adjust the distance(s) from the seam line (13) to the inner edge (5) of the collar, the first toothed or needle disk (28) for pushing and holding the separating cotton sheet (3) of the collar (1, 10) flush with said adjustable first stop (21), and a second toothed or needle disc (29) for holding and pressing against the bottom stop (22) the bottom edge (27) of the folded collar (1) and for holding the knitted piece (6) against the second adjustable stop (23 ). 2. The knitting machine (104) according to claim 1, characterized in that the first toothed or needle disk (28) along the periphery contains a plurality of teeth or needles for engaging and pulling the knitted product part (1, 10, 6). 3. Kettel machine (104) according to claim 1 or 2, characterized in that the first toothed or needle disk (28) is tiltable or rotatable about an axis of rotation that is parallel to said vertical direction (Z-Z). 4. Kettelny machine (104) according to any one of claims 1-3, characterized in that the lower limiter (22) is designed to interact with the lower edge (27) of the gate (1, 10) and adjust to change the specified distance (a) from seam line (13) to the inner edge (5) of the collar (1, 10). 5. Knitting machine (104) according to any one of claims 1-4, characterized in that the adjustable second limiter (23) is configured to closely receive the neckline cutout (7) of the knitted product part (6) and adjust to change the value (b) details of a knitted product (6) sewn inside a folded collar (11). 6. Kettel machine (104) according to any one of claims 1 to 5, characterized in that the second toothed or needle disk (29) along the periphery contains a plurality of teeth or needles for engaging and pulling the knitted fabric (1, 10, 6). 7. Kettering machine (104) according to any one of claims 1 to 6, characterized in that said second toothed or needle disk (29) is rotatable, including tilting or rotating about an axis of rotation parallel to said vertical direction (Z-Z). 8. Kettetting machine (104) according to any one of claims 1 to 7, characterized in that the feed guide (20) contains profiled plates (33) for unfolding the neckline cutout (7) of the knitted product part (6). 9. Kettel machine (104) according to claim 8, characterized in that said profiled plates (33) have a contact edge having a wave-like profile. 10. Kettel machine (104) according to claim 9, characterized in that said wave-like profile is of a sinusoidal type. 11. Kettel machine (104) according to any one of claims 8-10, characterized in that the feed guide (20) is equipped with a system (35) for adjusting the pressure of the profiled plates (33). 12. Kettel machine (104) according to any one of claims 1 to 11, characterized in that said feed guide (20) contains a pin (31) for opening the collar (1, 10) and allowing the insertion of a piece of knitted product (6). 13. Kettel machine (104) according to any one of claims 1 to 12, characterized in that the machine (104) contains a camera (203) suitable for detecting a guide thread (140) located on at least one knitted fabric to be sewn, when In this case, the specified guide thread (140) is laid inside the fabric to identify multiple segments, the machine (104) contains a control unit (156), during operation connected to the camera (203) and the drives of the feeder (116) of the knitted product, the positioning device (120 ) of the needle (110) and the driving device (124) of the needle (110), for determining in real time the target position of the needle (110) when sewing depending on the thread guide (140) and for real-time control of the feed devices ( 116) parts of the knitted product, positioning devices (120) of the needle (110) and driving devices (124) of the needle (110) to achieve a specified target position of the needle (110) when sewing. -