Tub thread winding machine and thread powdering

Abstract

The invention provides a tub-type thread winding machine and a thread powder handling unit, comprising a single thread winding machine spindle and a bobbin processing device. The single thread winding machine spindle includes a bobbin changing device, a vacuum assembly, a compressed air nozzle, and its air supply system. The compressed air nozzle is arranged below the single-spindle unwinding station of the bobbin changing device and is connected to the air supply system via the air supply line. The invention is characterized in that a vacuum suction head is arranged below the single-spindle unwinding station, the air inlet of the vacuum suction head is located near the air outlet of the compressed air nozzle, the suction direction of both is opposite to the air jet direction, and the air outlet of the vacuum suction head is connected to the vacuum assembly.If the small suction nozzle fails to capture the thread end, causing it to fall, the thread end can automatically enter a central opening in the bobbin for rethreading or return to the bobbin processing unit for rethreading. This prevents waste from unwinding and reduces maintenance. The design is simple, the cost is low, and installation and reconfiguration are convenient. The single-spindle spinning process is simple, reliable, and efficient.

Description

Technical area

[0001] The invention belongs to the technical field of textile machinery and relates to improvements of an automatic thread winding machine and a thread powder handling system, in particular a tub thread winding machine and a thread powder handling system. State of the art

[0002] In conventional tub-type thread winding machines, bobbins for a single spindle are fed via a flat belt. During unwinding from a single spindle, when the thread cleaner cuts the thread or replaces it with a new bobbin, a small suction nozzle is activated to move downwards in order to draw in the thread end cut by a shearing unit. However, in some cases (such as when the downward movement of the small suction nozzle encounters resistance or parts of the nozzle are blocked), the nozzle is unable to draw in the thread. Under these circumstances, the thread end falls off, and a new bobbin must be inserted.The bobbin, with the thread end falling off the bobbin, is loaded onto a front conveyor belt and conveyed from there back to a bobbin processing unit to pick up a new thread end. The bobbin with the new thread is then conveyed under the single spindle via a rear conveyor belt to the single spindle for winding. If the thread end falls because its length exceeds the height of the bobbin, it can fall onto the front conveyor belt and wrap around other components. Simultaneously, the bobbin is displaced by the front conveyor belt, and therefore, during unwinding, the bobbin is moved forward. This results in a situation where a very long thread is wound up randomly each time the bobbin passes. The unwound threads interfere with the normal operation of the bobbin conveying system and increase maintenance requirements.

[0003] A thread threading process and a bobbin change process of a typical tub-type thread winding machine according to the state of the art are described in the Fig. 1, Fig. 2, Fig. 3 to Fig. 4 shown. Fig. Figure 1 is a schematic representation of a provided spool body into which the thread is threaded. Fig. Figure 2 is a schematic representation of a bobbin body after successful threading of the thread. Fig. Figure 3 is a schematic representation of a bobbin body after an unsuccessful attempt to thread the thread. Fig. Figure 4 is a schematic representation of a thread end falling onto the flat belt 17 when the bobbin is changed. The so-called thread threading process involves a single-spindle unwinding station where, at a compressed air outlet, a bobbin thread end 13 is blown by an air outlet through a compressed air nozzle 18. It then passes through the thread threading tube 12 and a bobbin sensor 11 to a suction opening of the small suction nozzle 7, where the bobbin thread end 13 is drawn in by the small suction nozzle 7. As shown in Fig. As shown in Figure 1, the bobbin body 14, with a normal thread end for threading, enters the single-spindle unwinding station, and meanwhile the large suction nozzle 6 locates a thread end 3 of the unit 1 and guides the thread end 3 to a staging position, as shown in Figure 1. Fig. 1 shown.

[0004] As in Fig. As shown in Figure 2, the thread end 3 is blown by an air outlet from the compressed air nozzle 18 and is then threaded by the compressed air nozzle 18 through the thread threading tube 12 and the bobbin sensor 11 into the suction opening of the small suction nozzle 7. The bobbin thread end 13 is gripped and sucked into the small suction nozzle 7 and inserted into the splicing unit 5 to splice it with the thread end 3, which is sucked in by the large suction nozzle 6. The unit 1 is driven by a grooved drum 2 to rotate for winding. If the thread cleaner 4 detects that the thread has a defect to be repaired, the thread is cut; one end of the thread, which is wound onto the unit 1, is then located again by the large suction nozzle 6, and the other end of the thread is picked up by a thread catcher 8 and cut again by the shearing unit 10.A tensioning device 9 is activated, and an upper thread end of the bobbin thread end 13 is sucked away from the thread catcher 8, and the small suction nozzle 7 is moved downwards to pick up the end of the thread. The two thread ends are spliced ​​again. As in . Fig. As shown in Figure 3, the bobbin thread end 13 falls because the small suction nozzle 7 does not draw in the bobbin thread end 13 for some reason. As shown in Figure 3. Fig. As shown in Figure 4, the coil body 14 leaves the single-spindle unwinding station on the flat belt 17 and causes a tangle when the flat belt 17 moves.

[0005] Since the above problems impair the normal operation of the existing automatic thread winding machine according to the state of the art, maintenance costs are greatly increased, the amount of thread waste is significant, production costs are also increased, and production efficiency is reduced.

[0006] With regard to the aforementioned problems in the prior art, no reasonable and effective technical solution has been found for a long time, and the applicant has also conducted research and development work on these problems for several years. However, through long-term research, an automatic mechanical transfer mechanism has been created, configured to pick up a new thread end at the single-spindle position, but it relies on sensors and an electrical control system that has a complex structure and low reliability, and can also incur enormous costs for upgrading the device.

[0007] Since each automatic thread spooling machine generally has 60 to 72 individual spindles, each individual spindle must be converted, resulting in very high cumulative conversion costs, with manufacturers having to make significantly higher investments for such an upgrade, which hinders its use and application.

[0008] If a tub-type thread winder is used where the small suction nozzle fails to capture the bobbin thread end, or other factors cause the thread end to fall off the bobbin, the falling bobbin thread end automatically enters a central opening in the bobbin, allowing a new thread end to be taken from the single-spindle unwinding station. This prevents the interruption of normal operation of the unwinding station caused by unwound threads and avoids the end of a new thread being drawn into the bobbin processing device. A winder that is simple in design, inexpensive, and easy to upgrade presents a technical challenge that requires a solution.

[0009] JP H03-110072 U describes a bobbin transport tray into which a fine spinning bobbin is placed, with an opening for supplying compressed air in the axial direction of the bobbin along the bobbin surface layer. The air pressure of the compressed air is indirectly exerted on a yarn on the bobbin surface layer by means of the negative pressure created by the air pressure, in order to reliably unwind the yarn from the bobbin surface layer.

[0010] JP H02-147471 U describes a coil tray in which an air channel with an air outlet is formed on a tray for inserting a coil. This makes it possible to remove lint adhering to a coil support surface and to insert the coil directly onto the coil support surface of the tray.

[0011] CH 363921 A describes a powdering process with simultaneous detection and separation of the two thread ends of a spinning head with thread reserve wound at the base, whereby the head is exposed to an airflow flowing along the head base and the thread end running towards the head tip is held on the outside of the head.

[0012] DE 38 33 259 A1 describes a pallet for transporting caps, which has a disc-shaped base plate, a mounting mandrel for holding the cap and an air guide for directing an airflow through the cap sleeve, wherein the base surface for the sleeve foot is interrupted at least at one point to form an air guide that extends into the free interior of the cap sleeve.

[0013] EP 2 105 401 A2 describes a device for picking up a thread end, comprising a thread release device which sucks up and releases a thread end from a surface of a spool together with suction air via a suction cylinder which surrounds a circumference of the spool, and a cutting device which cuts the thread sucked up by the thread release device. Summary of the invention

[0014] To solve the problems and shortcomings of the prior art, the present invention provides a tub-type thread winding machine and a thread powdering system in which, if the small suction nozzle fails to grasp the bobbin thread end or other factors cause the bobbin thread end to fall, the fallen lower thread end automatically enters the central opening so that a new thread end can be drawn out of the single-spindle unwinding station; or, in the event of an interruption of the normal operation of the system caused by unwound threads, the insertion of a new thread end through the bobbin processing device is prevented; a winding machine is provided which has a simple design, is inexpensive, and is easy to upgrade.

[0015] The purpose of the present invention is achieved by the following technical solutions: A tub-type thread winding machine comprises a single thread winding machine spindle and a bobbin processing device; the single thread winding machine spindle comprises a bobbin changing device, a vacuum assembly, a compressed air nozzle, and an air supply system for the compressed air nozzle, wherein the bobbin changing device comprises a single-spindle unwinding station and the compressed air nozzle is arranged below the single-spindle unwinding station; wherein the compressed air nozzle is connected to the air supply system via an air supply line to the compressed air nozzle; wherein a vacuum suction head is arranged on the single-spindle unwinding station, which has an air inlet and an air outlet, wherein the air inlet of the vacuum suction head is arranged near the air outlet of the compressed air nozzle, and wherein the suction direction from the air inlet of the vacuum suction head to the direction of the air outlet of the compressed air nozzle is opposite;and the air outlet of the vacuum suction head is connected to the vacuum assembly via a vacuum line.

[0016] Furthermore, the coil former changing device has a base for replacing the coil former and a base plate, wherein a vent opening is formed in the base plate below the single-spindle unwinding station; wherein the air outlet of the compressed air nozzle is oriented upwards towards the vent opening; wherein the air inlet of the vacuum suction head is attached to the underside of the base plate and covers the vent opening and the surrounding parts; wherein a vent filter screen is arranged between the vent opening, where the vent opening and the surrounding parts are provided, and the air inlet of the vacuum suction head.

[0017] Furthermore, the vacuum suction head is attached to the underside of the base plate or to the top of the base for replacing the coil body; wherein the compressed air nozzle and the vacuum suction head are integrally formed, the vacuum suction head having a cylindrical shape with an upper end forming the air inlet for the vacuum suction head; wherein the air outlet of the compressed air nozzle is arranged at a position corresponding to a central section of a cavity of the vacuum suction head and the air inlet of the compressed air nozzle on an outer side wall of the vacuum suction head; wherein the air inlet of the compressed air nozzle on the outer side wall of the head is connected to one end of the air supply line and the other end of the air supply line is connected to an air outlet of the air supply system.

[0018] Furthermore, the individual thread winding machine spindle includes a grooved drum, a thread cleaner, a splicing device, a large suction nozzle, a small suction nozzle, a thread catcher, a tensioning device, a shearing unit, a bobbin sensor and a thread threading tube, wherein the thread threading tube, the large suction nozzle, the small suction nozzle and the thread catcher are all connected to the vacuum assembly.

[0019] Furthermore, the bobbin processing device includes a bobbin pulling device, a bobbin insertion device, a threading device for a thread end of a bobbin, and a bobbin processing conveying channel formed by a bobbin changing guide.

[0020] Furthermore, the tub winding machine has a coil conveying device with a tub, a flat belt and a drive device, wherein a tub filter screen is arranged in the tub.

[0021] A thread powdering process for a tub thread winding machine has the following steps: S1: A spool body with a normal thread end enters the single-spindle unwinding station; one thread end of the unit is located by the large suction nozzle and brought into a splicing position; S2: A bobbin thread end is blown by the compressed air nozzle, then guided through the thread threading tube and a bobbin sensor to the air inlet of the small suction nozzle, and is captured and sucked in by the small suction nozzle to introduce it into the splicing device, and it is then spliced ​​with the thread end of the unit that was captured by the large suction nozzle; S3: The unit is driven by the grooved drum to rotate it for winding; S4: During the winding process, if the thread cleaner detects that the thread has a defect that needs to be corrected, the thread is cut, and one end of the thread is wound onto the unit and then located by the large suction nozzle; the other end is caught by the thread catcher and cut by the shear unit; meanwhile, the tensioning device is activated and an upper bobbin thread end is sucked away by the thread catcher, with the small suction nozzle capturing the remaining thread end of the bobbin and preparing it for splicing; S5: If the small suction nozzle fails to draw in the bobbin thread end and continues to cause the bobbin thread end to fall, the bobbin thread end passes through the upper bobbin opening and is drawn into a central opening of the bobbin due to the negative pressure at the upper end of the bobbin. The thread end of the bobbin is blown by the compressed air nozzle to draw the bobbin thread end back in when the bobbin is at the single-spindle unwinding station. If the drawing in of the thread end of the bobbin fails, the bobbin 14 is removed from the single spindle and conveyed to the bobbin processing device to draw a bobbin thread through a drawing unit in the bobbin processing device. In the meantime, a bobbin is conveyed to the single-spindle unwinding station to repeat the cycle.

[0022] An improvement on the above technical solution: In step S3, if the thread breaks spontaneously during the thread winding process, and it is further determined whether the thread break occurs above the thread catcher, one end of the broken thread is wound onto the unit and then located by the large suction nozzle, with the other bobbin thread end being picked up by the thread catcher and cut by the shearing unit; the tensioning device is activated and the upper end of the thread is sucked away from the bobbin and the thread catcher; the small suction nozzle is moved downwards to pick up the remaining bobbin thread end and re-splice it; if the thread break occurs below the thread catcher, when the broken bobbin thread end falls, it is sucked into the central opening by negative pressure;wherein the thread end is blown through the compressed air nozzle and then threaded through a thread threading tube and the bobbin body sensor to an air inlet of the small suction nozzle, and then picked up and sucked through the small suction nozzle to feed it to the splicing device, and then it is spliced ​​with the thread end of the unit that was picked up by the large suction nozzle.;

[0023] A further improvement on the above technical solution: In step S3, during the winding process, if the thread cleaner detects a quality problem with the bobbin and the bobbin needs to be removed, the shear unit cuts the thread and the small suction nozzle cannot be moved downwards; the thread end of the bobbin falls into a central opening of the bobbin for a bobbin change, the bobbin being conveyed to the bobbin processing device and pulled out by the bobbin processing device.

[0024] A further improvement on the above technical solution: Each time the small suction nozzle is moved downwards to pick up the thread end, the compressed air nozzle blows once, whereby a vacuum is always maintained in the cavity of the vacuum suction nozzle during the winding process, and the vacuum value is in the range of 35 to 60 millibar.

[0025] The advantages and positive effects of the present invention compared to the prior art are: 1. The invention utilizes the original vacuum assembly of the tub thread winding machine and mainly adds a vacuum suction head at the vent on the underside of the base plate for changing the bobbin, in order to create a vacuum at the upper end of the bobbin; wherein, if the small suction nozzle fails to draw in the bobbin thread end and furthermore causes the bobbin thread end to fall off or other reasons cause the bobbin thread end to fall off, the bobbin thread end passes the upper end of the bobbin and is drawn in due to the vacuum at the upper end of the upper central opening of the bobbin; wherein the bobbin thread end is blown by the compressed air nozzle to retract the bobbin thread when the bobbin is at the single-spindle unwinding station;wherein, if the drawing of the bobbin thread fails, the bobbin is ejected from the single spindle and conveyed to the bobbin processing device to draw the bobbin thread through the drawing unit of the bobbin processing device in order to avoid interruption of the normal operation of the tub by a yarn tangle and to improve production efficiency and reduce maintenance costs. 2. The present invention adds a filter screen between the vacuum suction head and the bobbin changing device to prevent the bobbin thread end that is not in the central opening of the bobbin, or threads or other parts, from entering the vacuum suction head and causing a blockage. 3. The structure of the present invention is reasonable in design, simple and compact, convenient to install and modify, and the cost of modifying the equipment is very low; it is suitable for large-scale distribution and application. 4. Thread powdering based on the tub thread winding machine according to the present invention is simple, reliable and efficient. Description of the drawings Fig. Figure 1 is a schematic diagram of a known tub-type thread-winding machine with a normal spool for threading; Fig. Figure 2 is a schematic diagram of successful bobbin threading on a known tub-type thread winding machine; Fig. Figure 3 is a schematic diagram of an unsuccessful bobbin threading operation on a known tub-type thread winding machine; Fig. Figure 4 is a schematic diagram of the thread end falling onto the flat belt when the bobbin case is changed on the known tub thread winding machine; Fig. Figure 5 is a schematic diagram of the tub thread winding machine according to the present invention, which re-enters the central opening of the bobbin body after the threading of the bobbin body has been unsuccessful; Fig. Figure 6 is a schematic diagram of the tub thread winding machine according to the present invention, after the end of the spool thread enters the central opening of the spool body and is released. Detailed description

[0026] The present invention is described in more detail below in conjunction with the accompanying drawings: With reference to the Fig. 5 to Fig. Figure 6 contains an embodiment of a tub-type thread winding machine according to the present invention, comprising a single thread winding machine spindle and a bobbin processing device. The single thread winding machine spindle includes a bobbin changing device, a vacuum assembly 21, and the compressed air nozzle 18 and its air supply system. A compressed air nozzle 18 is arranged below the single-spindle unwinding station of the bobbin changing device and is connected to an air supply system via an air supply line. A vacuum suction head 22 is arranged at the single-spindle unwinding station, and an air inlet and an air outlet are arranged on the vacuum suction head 22. The air inlet of the vacuum suction head 22 is located near the air outlet of the compressed air nozzle 18.The suction direction of the air inlet of the suction head 22 is opposite to the air jet direction of the air outlet of the compressed air nozzle 18, and the air outlet of the vacuum suction head 22 is connected to the vacuum assembly 21 via a vacuum line.

[0027] When the aforementioned technical solution of the present invention is used to modify the existing tub-type thread winding machine, the main component of the solution is the addition of a vacuum suction head 22, which is then connected to the vacuum assembly 21 via a vacuum line. That is, the vacuum suction head 22 and the associated vacuum line are newly added components, while the other components, including the vacuum assembly 21, can all retain their original components. In this way, the vacuum can be generated at the single-spindle unwinding station at the upper opening of the bobbin case 14. As the bobbin case thread end 13 passes through the upper opening of the bobbin case 14, the released bobbin case thread end 13 is drawn into the central hole of the bobbin case 14 because the upper opening of the bobbin case 14 is under vacuum.In this way, conditions are met for single-spindle bobbin spinning in the single-spindle unwinding station.

[0028] Generally, coil spinning is performed by the single-spindle device in the coil former processing device, and "single-spindle coil spinning" is the first concept proposed by the applicant. The above technical solution, which embodies this concept, is also the first to implement the single-spindle coil spinning function in the single-spindle unwinding station. The concept is very intelligent, fully utilizing the original equipment components, with a simple and compact design, very low costs, and achieving unexpected results.

[0029] Furthermore, the aforementioned coil-changing device comprises a coil-changing base 24 and a base plate 19. A vent opening 19.1 is provided on the base plate 19 below the single-spindle unwinding station, and the vent opening of the compressed air nozzle 18 is aligned upwards with the vent opening 19.1. The air inlet of the vacuum suction head 22 is attached to the lower surface of the base plate 19 and covers the vent opening 19.1 and its surrounding parts. A vent filter screen 23 is provided between the vent opening 19.1 on the lower surface of the base plate 19 and its surrounding parts and the air inlet of the vacuum suction head 22. The vent filter screen 23 can be attached to the lower surface of the base plate 19 or it can be installed directly on the vacuum suction head 22.In this way it is possible to prevent the spool body thread end 13, which does not enter the center hole of the spool or other external locations, from entering the vacuum suction head 22 and causing a blockage.

[0030] In particular, the vacuum suction head 22 can be attached to the lower surface of the base plate 19 or to the upper surface of the coil exchange base 24. The compressed air nozzle 18 and the vacuum suction head 22 are designed as an integral structure. The vacuum suction head 22 has a cylindrical shape. The upper opening of the cylindrical shape is the air inlet of the vacuum suction head 22. The air outlet of the vacuum suction head 22 is located on the lower surface of the cylindrical shape. The air outlet of the compressed air nozzle 18 is located in the center of the cavity of the vacuum suction head 22, and the air inlet of the compressed air nozzle 18 is located on the outer side wall of the vacuum suction head 22. One end of the air supply line is connected to the air inlet of the compressed air nozzle 18 on the outer side wall of the vacuum suction head 22, and the other end of the air supply line is connected to the air outlet of the air supply system.

[0031] Furthermore, the single spindle of the aforementioned thread winding machine also includes a grooved drum 2, a thread cleaner 4, a splicing device 5, a large suction nozzle 6, a small suction nozzle 7, a thread catcher 8, a tensioning device 9, a shearing unit 10, and a bobbin sensor 11. The thread threading tube 12, the large suction nozzle 6, the small suction nozzle 7, and the thread catcher 8 are all connected to the vacuum assembly 21. The aforementioned components and the connection structure only need to be retained as original components when the existing tub thread winding machine is converted. The aforementioned tensioning device 9 is a tension disc or a grid tensioning device.

[0032] Furthermore, the above-mentioned coil body processing device includes a coil pulling device, a coil insertion device, a threading device and a coil processing conveying channel formed by a coil changing guide 20.

[0033] The tub-type thread winding machine of the present invention further comprises a winding device having a tub 16, a flat belt 17 and its drive device, and a tub filter screen 15 is provided in the tub 16. It can reduce the thread tangling caused by the running process of the tub 16 when the winding thread is too long.

[0034] With reference to Fig. 5 to Fig. Section 6 comprises an embodiment of the thread powdering process of the above-mentioned tub thread winding machine of the present invention comprising the following steps: S1: A spool body 14 with a normal thread end 3 enters the single-spindle unwinding station; a thread end 3 of the unit 1 is located by the large suction nozzle 6 and brought into a splicing position; S2: A spool body thread end 13 is blown by the compressed air nozzle 18, it is then guided through the thread threading tube 12 and a spool body sensor 11 to the air inlet of the small suction nozzle 7, and it is captured and sucked in by the small suction nozzle 7 to introduce it into the splicing device 5, and it is then spliced ​​with the thread end 3 of the unit 1, which was captured by the large suction nozzle 6; S3: The grooved drum 2 drives the spool 1 to rotate for winding; S4: If the thread cleaner 4 detects during the winding process that the thread has a defect that needs to be corrected, the thread is cut, and one end of the thread is wound onto the bobbin 1 and then located by the large suction nozzle 6. The other thread end 3 is caught by the thread catcher 8, the shear unit 10 cuts the thread again, the tensioning device 9 opens, the upper thread end 3 is sucked away by the thread catcher 8, and the small suction nozzle 7 is moved downwards to pick up the remaining thread end 3 from the bobbin body 14 and prepared for splicing; S5: If the small suction nozzle 7 fails to draw in the bobbin thread end 13 and continues to cause the bobbin thread end 13 to fall, the bobbin thread end 13 passes through the upper bobbin opening and is drawn into a central opening of the bobbin 14 due to the negative pressure at the upper end of the bobbin 14, whereby the thread end 3 of the bobbin 14 is blown by the compressed air nozzle 18 to draw in the bobbin thread end 13 again when the bobbin 14 is at the single-spindle unwinding station; wherein, if the drawing in of the thread end 3 of the bobbin 14 fails, the bobbin 14 is removed from the single spindle and conveyed to the bobbin processing device to draw a bobbin thread through a drawing unit in the bobbin processing device; Meanwhile, a coil body 14 is conveyed to the single-spindle unwinding station to repeat the cycle.

[0035] If, in step S3 above, the thread spontaneously breaks during the thread winding process, and it is further determined whether the thread break occurs above the thread catcher 8, one end of the broken thread is wound onto the unit 1 and then located by the large suction nozzle 6, the other thread end 3 of the bobbin 14 being picked up by the thread catcher 8 and cut by the shear unit 10; the tensioning device being activated and the upper end of the thread being sucked away from the bobbin 14 by the thread catcher 8; the small suction nozzle 7 being moved downwards to pick up the remaining thread end 3 of the bobbin 14 and re-splicing it; if the thread break occurs below the thread catcher 8, when the broken thread end 3 of the bobbin 14 falls, it is sucked into the central opening by negative pressure;wherein the thread is blown through the compressed air nozzle 8 and then threaded through a thread threading tube 12 and the bobbin body sensor 11 to an air inlet of the small suction nozzle 7, and then picked up and sucked through the small suction nozzle 7 to feed it to the splicing device 5, and then spliced ​​with the thread end 3 of the unit 1 which was picked up by the large suction nozzle 6.;

[0036] Furthermore, in the aforementioned step S3, during the winding process, if the thread cleaner 4 detects a quality problem with the bobbin 14 and the bobbin 14 needs to be removed, the shear unit 10 cuts the thread, and the small suction nozzle 7 cannot be moved downwards. The thread end 3 of the bobbin 14 then falls into the central opening of the bobbin 14 for a bobbin change. The bobbin 14 is then conveyed to the bobbin processing device and pulled out by the bobbin pulling device. At this point, the bobbin thread end 13 will not fall onto the flat belt 17 and will not become entangled during conveyance to the bobbin processing device, which would impair the normal operation of the trough 16.

[0037] In the aforementioned thread powdering process, the compressed air nozzle 18 must blow once each time the small suction nozzle 7 moves down to grip the spool; preferably, the vacuum is maintained in the cavity of the vacuum suction head 22 during the powdering process, and the vacuum value range is 35 to 60 millibar.

[0038] Of course, the above description does not constitute a limitation of the present invention, and the present invention is not limited to the examples above. Any change, modification, addition, or replacement by a person skilled in the art that substantially encompasses the present invention may also be used. These fall within the scope of protection of the present invention. Reference symbol list 1 unit 2 grooved drum 3 Thread ends 4 thread cleaners 5 Splicing device 6 large suction nozzles 7 small suction nozzles 8 thread catchers 9 Clamping device 10 scissor units 11 Coil body sensor 12 Threading tube 13 Spool body thread end 14 coil formers 15 Tub filter screen 16 tubs 17 flat ribbon 18 compressed air nozzle 19 Base plate 19.1 Vent opening 20 coil change guide 21 Vacuum assembly 22 Vacuum suction head 23 Vent filter screen 24 coil interchangeable sockets

Claims

[1] Tub-type thread winding machine, comprising a single thread winding machine spindle and a bobbin processing device, wherein the single thread winding machine spindle comprises a bobbin changing device, a vacuum assembly (22), a compressed air nozzle (18) and an air supply system for the compressed air nozzle (18), wherein the compressed air nozzle (18) is arranged below the single-spindle unwinding station of the bobbin changing device and the compressed air nozzle (18) is connected to the air supply system via an air supply line, characterized by, that a vacuum suction head (22) is provided below the single-spindle unwinding station, wherein an air inlet and an air outlet are arranged on the vacuum suction head (22), wherein the air inlet of the vacuum suction head (22) is located near the air outlet of the compressed air nozzle (18), wherein the suction direction of the air inlet of the vacuum suction head (22) is opposite to the direction of the air jet of the compressed air nozzle (18), and the air outlet of the vacuum suction head (22) is connected to the vacuum assembly (21) via a vacuum line. [2] Tub thread winding machine according to claim 1, characterized by, that the coil former changing device consists of a coil changing base (24) and a base plate (19), wherein a vent opening (19.1) is provided on the base plate (19) below the single-spindle unwinding station, wherein the air outlet of the compressed air nozzle (18) is aligned upwards with the vent opening (19.1), and the air inlet of the vacuum suction head (22) is attached to the underside of the base plate (19) and covers the vent opening (19.1) and surrounding parts, wherein a vent filter screen (23) is provided between the vent opening (19.1) and the surrounding parts on the underside of the base plate (19) and the air inlet of the vacuum suction head (22). [3] Tub thread winding machine according to claim 2, characterized bythat the vacuum suction head (22) is attached to the underside of the base plate (19) or to the coil exchange base (24), wherein the compressed air nozzle (18) and the vacuum suction head (22) are an integral assembly, and the shape of the vacuum suction head (22) is a cylindrical shape, wherein the upper opening of the cylindrical shape is an air inlet of the vacuum suction head (22) and an air outlet of the vacuum suction head (22) is provided at the underside of the cylindrical shape, wherein the air outlet of the compressed air nozzle (18) is located in the center of the cavity of the vacuum suction head (22) and the air inlet of the compressed air nozzle (18) is arranged on the outer side wall of the vacuum suction head (22), wherein the air supply line is connected to the air inlet of the compressed air nozzle (18) on the outer side wall of the vacuum suction head (22). is. [4] Tub thread winding machine according to one of claims 1 to 3, characterized by, that the individual thread winding machine spindle further comprises a grooved drum (2), a thread cleaner (4), a splicing device (5), a large suction nozzle (6), a small suction nozzle (7), a thread catcher (8), a tensioning device (9), a shearing unit (10), a bobbin sensor (11) and a thread threading tube (12), wherein the large suction nozzle (6), the small suction nozzle (7) and the thread catcher (8) are connected to the vacuum assembly (21). [5] Tub thread winding machine according to claim 4, characterized by , that the coil body processing device comprises a coil pulling device, a coil insertion device, a threading device and a coil processing conveying channel formed by a coil changing guide. [6] Tub thread winding machine according to claim 5, characterized by, that a coil conveyor device is provided, wherein the coil conveyor device has a trough (16), a flat belt (17) and a drive device, and a trough filter screen (15) is arranged in the trough (16). [7] Thread powder feeder for a tub thread winding machine according to one of claims 1 to 6, characterized by that the thread powder driving process includes the following steps: S1: A spool body (14) with a normal thread end (3) enters the single-spindle unwinding station; a thread end (3) of the unit (1) is located by the large suction nozzle (6) and brought into a splice position; S2: A spool body thread end (13) is blown by the compressed air nozzle (18), is then guided through the thread threading tube (12) and a spool body sensor (11) to the air inlet of the small suction nozzle (7), and is captured and sucked in by the small suction nozzle (7) to introduce it into the splicing device (5), and is then connected to the thread end (3) of the unit (1) that was captured by the large suction nozzle (6). S3: The unit (1) is driven by the grooved drum (2) to rotate it for winding; S4: During the winding process, if the thread cleaner (4) detects that the thread has a defect that needs to be rectified, the thread is cut and One end of the thread is wound onto the unit (1) and then located by the large suction nozzle (6); the other end is caught by the thread catcher (8) and cut by the shearing unit (10); meanwhile, the tensioning device (9) is activated and an upper bobbin thread end (13) is sucked away from the thread catcher (8), with the small suction nozzle (7) being moved downwards to pick up the remaining thread end (3) of the bobbin (14) and prepared for splicing; S5: If, in step S4, the small suction nozzle (7) fails to draw in the bobbin thread end (13) and further causes the bobbin thread end (13) to fall, the bobbin thread end (13) passes through the upper bobbin opening and is drawn into a central opening of the bobbin (14) due to the negative pressure at the upper end of the bobbin (14), whereby the thread end (3) of the bobbin (14) is blown by the compressed air nozzle (18) to draw in the bobbin thread end (13) again when the bobbin (14) is at the single-spindle unwinding station; wherein, if the drawing in of the thread end (3) of the bobbin (14) fails, the bobbin (14) is removed from the single spindle and conveyed to the bobbin processing device to draw a bobbin thread through a drawing unit in the bobbin processing device;in the meantime a coil former (14) is conveyed to the single-spindle unwinding station to repeat the cycle. [8] Thread powder feed of a tub thread winding machine according to claim 7, characterized by, that in step S3, if the thread breaks spontaneously during the thread winding process, and furthermore, if it is determined whether the thread break occurs above the thread catcher (8), one end of the broken thread is wound onto the unit (1) and then located by the large suction nozzle (6), the other thread end (3) of the bobbin body (14) being picked up by the thread catcher (8) and cut by the shearing unit (10); the tensioning device being activated and the upper end of the thread being sucked away from the bobbin body (14) and the thread catcher (8); the small suction nozzle (7) being moved downwards to pick up the remaining thread end (3) of the bobbin body (14) and re-splicing it; if the thread break occurs below the thread catcher (8), when the broken thread end (3) of the bobbin body (14) falls, it is sucked into the central opening by negative pressure;wherein the thread is blown through the compressed air nozzle (8) and then threaded through a thread threading tube (12) and the bobbin body sensor (11) to an air inlet of the small suction nozzle (7), and is then picked up and sucked through the small suction nozzle (7) to feed it to the splicing device (5), and is then spliced ​​with the thread end (3) of the unit (1) that was picked up by the large suction nozzle (6). [9] Thread powder feed of a tub thread winding machine according to claim 7, characterized by, that in step S3 during the winding process, if the thread cleaner (4) detects a quality problem with the bobbin (14) and the bobbin (14) has to be removed, the shear unit (10) cuts the thread and the small suction nozzle (7) cannot be moved downwards; the thread end (3) of the bobbin (14) falls into the central opening of the bobbin (14) for a bobbin change, the bobbin (14) being conveyed to the bobbin processing device and pulled out by the bobbin device. [10] Thread powder feeder of a tub thread winding machine according to one of claims 7 to 9, characterized by, that each time the small suction nozzle (7) is moved downwards to pick up the thread end (3) the compressed air nozzle (18) is activated once, whereby a vacuum is always maintained in the cavity of the vacuum suction nozzle (22) during the winding process and the vacuum value is in the range of 35 to 60 millibar.

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