Yarn-cutting-free wire drawing machine capable of automatically feeding, replacing heads and pushing out transition yarns and machine head of wire drawing machine

Abstract

The utility model relates to the technical field of glass fiber kiln wire drawing equipment, in particular to a yarn-cutting-free wire drawing machine capable of automatically feeding, replacing heads and pushing out transition yarns and a machine head of the yarn-cutting-free wire drawing machine. The wire drawing machine head comprises a machine head main shaft and an upper head-changing yarn pushing assembly; the upper head changing and yarn pushing assembly comprises an upper head changing transition ring, a yarn pushing mechanism, an upper head changing mechanism and a yarn pushing buffering mechanism. Through the cooperation between the machine head main shaft and the upper head-changing yarn pushing assembly, not only can the head-up and head-changing operations of the wire drawing machine be automatically completed, but also transition yarns formed in the head-up and head-changing processes can be automatically treated, so that the labor intensity is favorably reduced, the automation degree is improved, and the safety condition of man-machine cooperation is improved. Meanwhile, the whole circle of transition yarn can be recycled, the recovery value of the transition yarn is improved, and waste yarn and hairiness yarn are prevented from polluting the environment.

Description

Technical Field

[0001] The present application relates to the technical field of glass fiber kiln drawing equipment, and in particular to a drawing machine and a machine head thereof for automatically changing the head of a cut-free yarn and pushing out a transition yarn. Background Art

[0002] As a composite reinforcing material, glass fiber has a wide range of applications and comes in a variety of varieties. It can be directly drawn into cylindrical yarn balls through a wire drawing machine, or drawn into horse-shaped yarn balls through a wire cake drawing machine.

[0003] In the current fiberglass kiln drawing process, the full-bobbin replacement and automatic head loading of the wire drawing machine are achieved by winding the yarn on the upper wire ring through a V-groove plus a wire hook or an upper wire ring with a threaded groove plus a wire hook. This is also a more superior upper wire ring structure in recent years. However, the yarn left on the upper wire ring is difficult to remove by the robot. It must be cut and cleared manually on site before the robot can complete the yarn removal work. Such human-machine cooperation has safety hazards and cannot achieve automated continuous production.

[0004] With the progress of society, harsh working environment and operational safety have become top priorities. Now we have entered the era of intelligent manufacturing. It is imperative to use closed fully automatic robots to replace manual operations in the wire drawing area, and to save energy and reduce consumption to improve production efficiency. In order to solve the problem of how to improve the utilization value of waste yarn and unmanned automation, the cutting and removal of yarn left on the upper wire ring must be broken through to achieve the upgrade of existing equipment, realize the automated production operation of unmanned pushing out the whole circle of waste yarn, improve the overall performance and efficiency of existing wire drawing machines, and increase the residual value of waste yarn to achieve significant economic benefits.

[0005] The upper wire ring and upper wire hook are components set on the head spindle of the wire drawing machine to complete the automatic head change, and are generally set at the front end of the head spindle of the wire drawing machine. The glass fiber from the wire drawing machine is first captured by the upper wire hook and wound on the upper wire ring, and then the glass fiber is pushed to the winding area on the head spindle for winding through a mechanism similar to a wire push rod. Since the head spindle of the wire drawing machine is constantly rotating during the process from when the glass fiber is captured by the upper wire hook to when it is pushed to the winding area, some transition yarns will be formed on the upper wire ring during the above-mentioned automatic head change process. The finished yarn balls or yarn cakes are wound in the winding area on the head spindle, but these yarn balls or yarn cakes must be treated before the transition yarn on the upper wire ring is removed. For the processing of transition yarn, it is currently completed manually on the production line, and the operator manually cuts and removes the transition yarn with a tool, which not only causes safety hazards and hinders the automation process, but also produces a lot of waste yarn and feather yarn to pollute the environment. The prior art has not disclosed a solution that can effectively and automatically process the transition yarn and enhance the value of the transition yarn.

[0006] The technical documents related to this application are:

[0007] Chinese patent: A yarn cutting-free mechanism for the upper wire ring of a wire drawing machine, publication number CN215559895U, involving the existing upper wire ring structure;

[0008] Chinese patent: A needle-punched centrifugal cut-free yarn threading mechanism, publication number CN216738088U, involving the existing threading ring structure;

[0009] Chinese patent: Slow-pull automatic head-up online cut-free yarn transition yarn-leading mechanism, publication number CN211141896U, involving existing upper wire hook and upper wire ring groove, head turntable and double head configuration scheme;

[0010] Chinese patent: An automatic yarn breaking mechanism for a wire drawing machine, application number 202323199256.3, relates to an existing automatic yarn breaking mechanism. Utility Model Content

[0011] In view of this, the present application provides a wire drawing machine and a machine head for automatically changing the head of the cut-free yarn and pushing out the transition yarn, so as to solve all or part of the technical problems described in the background technology part of the present application.

[0012] The present application provides a wire drawing machine head for automatically changing the head of the cut-free yarn and pushing out the transition yarn in order to solve the technical problem:

[0013] A wire drawing machine head for automatically changing the head of a cut-free yarn and pushing out a transition yarn, comprising a head main shaft, characterized in that:

[0014] It also includes an upper head-changing yarn pushing assembly, which includes an upper head-changing transition ring and a yarn pushing mechanism, and the yarn pushing mechanism includes a yarn pushing piston rod, a yarn pushing reset member, a centrifugal yarn pushing rod, and a yarn pushing seat;

[0015] The main shaft of the machine head is provided with a yarn pushing piston chamber and an air passage; the air passage is connected to the yarn pushing piston chamber;

[0016] The upper head-changing transition ring is provided with a transition slope, a transition ring cavity and a centrifugal yarn pushing channel;

[0017] The upper head-changing transition ring is arranged at the front end of the machine head main shaft, i.e., the opening of the yarn-pushing piston cavity;

[0018] The yarn pushing piston rod and the yarn pushing reset member are both arranged in the yarn pushing piston cavity; the yarn pushing piston rod can extend out of the yarn pushing piston cavity under the action of compressed air and compress the yarn pushing reset member at the same time;

[0019] The yarn pushing seat is arranged at the end of the yarn pushing piston rod and is located in the transition ring cavity; the centrifugal yarn pushing rod is hinged on the yarn pushing seat and is located in the centrifugal yarn pushing channel.

[0020] Preferably, the yarn pushing and resetting member is a spring and / or a spring.

[0021] The working principle of the upper head-changing yarn pushing assembly: compressed air is supplied, the yarn pushing piston rod extends out of the yarn pushing piston cavity, and at the same time drives the yarn pushing seat and the centrifugal yarn pushing rod to move synchronously. The centrifugal yarn pushing rod moves forward in the centrifugal yarn pushing channel to push out the transition yarn attached to the transition slope in a whole circle. When the compressed air is cut off, the centrifugal yarn pushing rod retracts into the yarn pushing piston cavity under the action of the yarn pushing reset member, and at the same time drives the yarn pushing seat and the centrifugal yarn pushing rod to move synchronously. The centrifugal yarn pushing rod retracts in the centrifugal yarn pushing channel and resets to the initial position.

[0022] Preferably, the upper head-changing transition ring is also provided with a yarn-breaking groove and an upper wire hook; the yarn-breaking groove and the upper wire hook are respectively located on both sides of the transition slope, and the yarn-breaking groove is located near the main shaft of the machine head. The upper wire hook is used to complete the automatic upper head-changing, and the yarn-breaking groove is used to cut off the connection between the transition yarn and the finished yarn ball.

[0023] Preferably, the centrifugal yarn pushing rod comprises a yarn pushing portion, a hinge hole and a buffer portion, and the yarn pushing portion and the buffer portion are respectively located on both sides of the hinge hole. The hinge hole is used to cooperate with a screw or other shaft component to hinge the centrifugal yarn pushing rod to the yarn pushing seat, the yarn pushing portion is used to contact and push the transition yarn, and the buffer portion is used to cooperate with the vibration reduction component to produce a buffering effect and to rotate and retract the centrifugal yarn pushing rod through the squeezing of the vibration reduction component, so as to facilitate the removal of the yarn ball and the insertion of the paper tube (the component for winding the yarn).

[0024] Preferably, the upper head-changing yarn pushing assembly further includes an upper head-changing mechanism, which includes an upper head-changing piston rod, an upper head-changing reset member, and an upper head-changing cylinder cover; an upper head-changing piston chamber is provided on the upper head-changing transition ring, and the upper head-changing piston chamber extends radially along the upper head-changing transition ring; the upper head-changing piston rod and the upper head-changing reset member are both provided in the upper head-changing piston chamber. The upper head-changing cylinder cover is provided at the opening of the upper head-changing piston chamber.

[0025] Preferably, the air passage is connected to each upper head-changing piston chamber.

[0026] Preferably, the upper head-changing resetting member is a spring and / or a spring sheet.

[0027] Preferably, an upper head-changing rod inner cavity is provided on the upper head-changing piston rod, and two ends of the upper head-changing reset member respectively abut against the bottom of the upper head-changing piston cavity and the upper head-changing rod inner cavity.

[0028] The working principle of the upper head-changing mechanism: when compressed air is supplied, the upper head-changing piston rod retracts into the upper head-changing piston chamber and compresses the upper head-changing reset part at the same time. At this time, the upper head-changing yarn pushing assembly pushes out the transition yarn; when the compressed air is cut off, the upper head-changing piston rod extends out of the upper head-changing piston chamber under the action of the upper head-changing reset part. At this time, the upper wire hook completes the automatic head-changing.

[0029] Preferably, the air channel includes a main air channel and a bypass air channel; the yarn pushing piston rod includes a piston part, a push rod part and a buffer head, and the buffer head and the push rod part are respectively arranged on both sides of the piston part; the bypass air channel is connected to the yarn pushing piston cavity and an auxiliary air hole is formed in the middle, and a limiting flow valve is arranged in the auxiliary air hole; the main air channel is connected to the yarn pushing piston cavity and a main air hole is formed in the middle, and the buffer head can close or open the main air hole.

[0030] Preferably, a transition ring air channel is also provided on the upper head-changing transition ring, and the transition ring air channel is connected to the upper head-changing piston chamber and the bypass air channel.

[0031] The principle of delayed push of the yarn pushing piston rod: in the initial state, the buffer head of the yarn pushing piston rod closes the main air hole between the main airway and the yarn pushing piston chamber; compressed air is supplied, and the compressed air enters the upper head changing piston chamber through the bypass airway, and the upper head changing piston rod contracts immediately. At the same time, the compressed air enters the yarn pushing piston chamber through the limiting valve between the bypass airway and the yarn pushing piston chamber. After the buffer head exits the main air hole between the main airway and the yarn pushing piston chamber, the main airway is opened, and the yarn pushing piston rod pushes out the transition yarn. The action is that the upper head changing piston rod first retracts into the upper head changing piston chamber, and then the yarn pushing piston rod pushes out the transition yarn.

[0032] Preferably, a positioning retaining ring is further provided at a portion of the transition ring cavity for communicating with the yarn pushing piston cavity, and the yarn pushing resetting member is arranged between the piston portion of the yarn pushing piston rod and the positioning retaining ring.

[0033] Preferably, the upper head-changing yarn pushing assembly further comprises a retaining ring, and the yarn pushing resetting member is arranged between the piston portion of the yarn pushing piston rod and the retaining ring.

[0034] Preferably, the upper head-changing yarn pushing assembly further includes a yarn pushing buffer mechanism, which includes a cover plate, which is arranged at the front end of the upper head-changing transition ring. Further, the yarn pushing buffer mechanism further includes a buffer and a vibration-damping component; the buffer is arranged on the yarn pushing piston rod and / or the yarn pushing seat, and the vibration-damping component is arranged on the cover plate. The orientations of the buffer and the vibration-damping component are basically aligned, so as to cooperate with each other to form a buffering effect.

[0035] Principle of yarn pushing buffer action:

[0036] When the yarn pushing piston rod is pushed out to the end of the stroke, the buffer contacts the vibration reduction component to buffer and decelerate. At this time, the centrifugal yarn pushing rod is affected by the vibration reduction component and rotates tilted, so that the yarn ball and paper tube can enter and exit freely; after unloading the yarn, the paper tube is put on to cut off the air source, and the yarn pushing piston rod is reset to retract the yarn pushing piston chamber. Since the buffer head blocks the main air hole, the remaining air is emptied by the flow limiting valve in the bypass airway as a deceleration buffer. After the yarn pushing piston rod is reset, the centrifugal yarn pushing rod rotates centrifugally vertically through the machine head.

[0037] Preferably, the centrifugal yarn pushing rod comprises a yarn pushing portion, a hinge hole and a buffer portion, wherein the yarn pushing portion and the buffer portion are respectively located on both sides of the hinge hole, and the hinge hole is used to hinge the centrifugal yarn pushing rod to the yarn pushing seat.

[0038] The wire drawing machine for automatically changing the head of cut-free yarn and pushing out the transitional yarn is characterized by comprising a wire drawing machine head for automatically changing the head of cut-free yarn and pushing out the transitional yarn according to any of the aforementioned technical solutions.

[0039] The control method corresponding to the aforementioned various wire drawing machines for automatically changing the head and pushing out the transition yarn and the machine head thereof is:

[0040] A control method for a wire drawing machine for automatically changing heads and pushing out transitional yarns without cutting yarns, characterized in that it comprises:

[0041] In the yarn pushing step, the compressed air is turned on, the yarn pushing piston rod extends out of the yarn pushing piston chamber, and the centrifugal yarn pushing rod moves along the centrifugal yarn pushing channel to push the transition yarn down the transition slope and compress the yarn pushing reset member at the same time;

[0042] In the resetting step, the compressed air is cut off, and the yarn pushing piston rod is retracted into the yarn pushing piston cavity under the action of the yarn pushing resetting member, and the centrifugal yarn pushing rod is reset to the initial state.

[0043] Preferably, in the yarn pushing step, after the compressed air is turned on, before the yarn pushing piston rod extends out of the yarn pushing piston chamber, the upper head changing piston rod retracts into the upper head changing piston chamber and simultaneously compresses the upper head changing resetting part; in the resetting step, after the compressed air is cut off, the upper head changing piston rod extends out of the upper head changing piston chamber under the action of the upper head changing resetting part.

[0044] Preferably, in the yarn pushing step, when the yarn pushing piston rod is pushed out to the end of the stroke, the centrifugal yarn pushing rod is affected by the vibration reduction component and rotates tiltedly; in the resetting step, the centrifugal yarn pushing rod automatically becomes vertical after the yarn pushing piston rod is reset.

[0045] Preferably, in the yarn pushing step, when the yarn pushing piston rod is pushed out to the end of the stroke, the buffer contacts the shock absorbing component to buffer and decelerate; in the resetting step, the yarn pushing piston rod is reset and retracted into the yarn pushing piston cavity, the buffer head blocks the main air hole, and the remaining air is discharged through the flow limiting valve in the bypass air duct as a deceleration buffer.

[0046] Beneficial technical effects:

[0047] The wire drawing machine and its head for automatically changing heads and pushing out transition yarn for cut-free yarn disclosed in the present application can not only automatically complete the head-changing and head-changing operations of the wire drawing machine through the cooperation between the upper head-changing yarn pushing assembly and the head main shaft, but also automatically process the transition yarn formed in the head-changing and head-changing processes, which is beneficial to reducing labor intensity, increasing the degree of automation, and improving the safety of human-machine cooperation; at the same time, the transition yarn can be recycled in an entire circle, thereby increasing the recycling value of the transition yarn and preventing the environment from being polluted by broken wool yarn.

[0048] The technical solution and technical effects of the present application are described in detail below in conjunction with the accompanying drawings and specific implementation methods. BRIEF DESCRIPTION OF THE DRAWINGS

[0049] Figure 1 : Front view of the wire drawing machine with automatic upper head change and transition yarn ejection;

[0050] Figure 2 : Side view of the wire drawing machine with automatic upper head change and transition yarn ejection for cut-free yarn;

[0051] Figure 3 : Figure 1 A partial enlarged view of the machine head with a full barrel;

[0052] Figure 4 : Figure 1 A partial enlarged view of the hollow tube die head;

[0053] Figure 5 : Figure 4 Middle AA section structure diagram;

[0054] Figure 6 : Figure 4 Middle BB section structure diagram;

[0055] Figure 7 : Figure 6 Schematic diagram of the middle push yarn state;

[0056] Figure 8 : Figure 7 A magnified view of part C in FIG.

[0057] Icon Description:

[0058] 10-machine head spindle;

[0059] 110-yarn pushing piston chamber;

[0060] 120-airway, 1210-main airway, 1220-bypass airway, 1230-main air hole, 1240-auxiliary air hole;

[0061] 20-upper head changing and yarn pushing assembly;

[0062] 210-upper head change transition ring;

[0063] 2110-transition slope, 2120-transition ring cavity, 2130-centrifugal yarn pushing channel;

[0064] 2140-yarn breaking groove, 2150-upper wire hook, 2160-upper head changing piston chamber, 2170-transition ring airway, 2180-positioning retaining ring;

[0065] 220-yarn pushing piston rod;

[0066] 2210-piston part, 2220-push rod part, 2230-buffer head;

[0067] 230-yarn pushing and resetting member;

[0068] 240-centrifugal yarn pushing rod;

[0069] 2410-yarn pushing part, 2420-hinge hole, 2430-buffer part;

[0070] 250-yarn pusher;

[0071] 260-flow limiting valve;

[0072] 270- retaining ring;

[0073] 280-upper head changing mechanism;

[0074] 2810-upper head change piston rod, 2820-upper head change reset member, 2830-upper head change cylinder head, 2840-upper head change rod inner cavity;

[0075] 290-yarn pushing buffer mechanism;

[0076] 2910-cover plate, 2920-buffer, 2930-vibration damping component;

[0077] 30-automatic yarn breaking mechanism, 40-screw push rod, 50-slow pulling mechanism. DETAILED DESCRIPTION

[0078] Terminology: The existing wire drawing machine generally includes a wire drawing machine body, a head turntable and two heads arranged on the head turntable (please refer to the patent: Slow-pull automatic head-on online cut-free yarn transition yarn feeding mechanism / 201922235065.5 Figure 1 ). The machine head includes a machine head spindle. When winding, first fix the paper tube on the machine head spindle, then connect the glass fiber to the paper tube, and the machine head spindle rotates to wind the glass fiber onto the paper tube to form a yarn ball or a yarn cake. When the paper tube being wound is full of glass fiber (full tube), the machine head turntable rotates to replace the paper tube that has not been wound (empty tube) to the winding position to continue winding. The full tube of yarn ball or yarn cake is removed by a robot or manually to enter the next process.

[0079] The process of connecting the glass fiber to the empty paper tube at the beginning is called head-on in this application, and the process of exchanging the positions of the empty tube and the full tube by rotating the head turntable is called head changing or tube changing in this application. The head changing in this application refers to the two operations of head-on and head changing.

[0080] When the empty bobbin is wound, the yarn is wound on the upper wire ring by adding a wire hook to a V-shaped groove or adding a wire hook to an upper wire ring with a thread groove, and then the glass fiber is pushed to the winding area of ​​the winding bobbin by a wire push rod. During the process, part of the transition yarn will be formed on the upper wire ring due to the rotation of the main shaft of the machine head, and there will be a connection line between the transition yarn and the finished yarn ball.

[0081] The wire drawing machine and its machine head disclosed in the present application can automatically complete automatic head loading, head changing and transition yarn processing of the wire drawing machine.

[0082] See also Figure 1-Figure 8 The head of the wire drawing machine for automatically changing the head of the cut-free yarn and pushing out the transition yarn disclosed in the present application includes a head main shaft 10 and an upper head changing yarn pushing assembly 20.

[0083] The head spindle 10 is provided with a yarn pushing piston chamber 110 and an air channel 120; the air channel includes a main air channel 1210 and a bypass air channel 1220. The bypass air channel 1220 is connected to the yarn pushing piston chamber 110 and an auxiliary air hole 1240 is formed in the middle, and the main air channel 1210 is connected to the yarn pushing piston chamber 110 and a main air hole 1230 is formed in the middle. The yarn pushing piston chamber 110 extends along the axial direction of the head spindle 10. A flow limiting valve 260 is provided in the auxiliary air hole 1240.

[0084] The upper head-changing yarn pushing assembly 20 comprises an upper head-changing transition ring 210, a yarn pushing mechanism, an upper head-changing mechanism 280, and a yarn pushing buffer mechanism 290. The yarn pushing mechanism comprises a yarn pushing piston rod 220, a yarn pushing reset member 230, a centrifugal yarn pushing rod 240, and a yarn pushing seat 250.

[0085] The upper head-changing transition ring 210 is provided with a transition slope 2110, a transition ring cavity 2120, a centrifugal yarn pushing channel 2130, a yarn breaking groove 2140, an upper wire hook 2150, an upper head-changing piston cavity 2160, and a transition ring air channel 2170. The transition slope 2110 is used to form transition yarn during automatic head changing; the yarn breaking groove 2140 and the upper wire hook 2150 are respectively located on both sides of the transition slope 2110, the yarn breaking groove 2140 is located near the position of the machine head spindle 10, and the upper head-changing piston cavity 2160 is located near the end of the upper head-changing transition ring 210 and extends along the radial direction of the upper head-changing transition ring 210. The transition ring air channel 2170 is connected to the upper head-changing piston cavity 2160 and the bypass air channel 1220.

[0086] The yarn pushing buffer mechanism 290 includes a cover plate 2910, a buffer 2920, and a vibration-damping component 2930. The upper head-changing transition ring 210 is fixedly assembled at the front end of the machine head spindle 10, i.e., the opening of the yarn pushing piston chamber 110, the cover plate 2910 is assembled at the end of the upper head-changing transition ring 210, and the vibration-damping component 2930 is assembled on the cover plate 2910 and located in the transition ring chamber 2120. The buffer 2920 is arranged on the yarn pushing piston rod 220 and / or the yarn pushing seat 250 and is substantially aligned with the vibration-damping component 2930 on the cover plate 2910.

[0087] The yarn pushing piston rod 220 and the yarn pushing reset member 230 are both arranged in the yarn pushing piston cavity 110. The yarn pushing piston rod 220 comprises a piston portion 2210, a push rod portion 2220, and a buffer head 2230. The buffer head 2230 and the push rod portion 2220 are respectively located on both sides of the piston portion 2210.

[0088] The buffer head 2230 of the yarn pushing piston rod 220 is disposed in the main air hole 1230 between the main air channel 1210 and the yarn pushing piston chamber 110, and can close or open the main air hole 1230 through axial piston movement.

[0089] A positioning retaining ring 2180 is further provided at a portion of the transition ring cavity 2120 for communicating with the yarn pushing piston cavity 110 , and the yarn pushing resetting member 230 is arranged between the piston portion 2210 of the yarn pushing piston rod 220 and the positioning retaining ring 2180 .

[0090] The yarn pushing reset member 230 is a spring sleeved on the push rod portion 2220 of the yarn pushing piston rod 220. The spring is located between the piston portion 2210 of the yarn pushing piston rod 220 and the positioning stop ring 2180 of the transition ring cavity 2120. When compressed, the two ends of the spring respectively press against the piston portion 2210 of the yarn pushing piston rod 220 and the positioning stop ring 2180 of the transition ring cavity 2120.

[0091] In some variant embodiments of the present application, the upper head-changing yarn pushing assembly 20 further includes a retaining ring 270, which is disposed on the positioning retaining ring 2180, and the yarn pushing reset member 230 is disposed between the piston portion 2210 of the yarn pushing piston rod 220 and the retaining ring 270. When the yarn pushing piston rod 220 runs to the end of the pushing stroke, the piston portion 2210 can generate a buffering effect through the retaining ring 270 to avoid rigid cooperation with the positioning retaining ring 2180.

[0092] The yarn pushing seat 250 is arranged at the end of the yarn pushing piston rod 220 and is located in the transition ring cavity 2120 . The centrifugal yarn pushing rod 240 is hinged on the yarn pushing seat 250 and is located in the centrifugal yarn pushing channel 2130 .

[0093] The centrifugal yarn pushing rod 240 includes a yarn pushing portion 2410, a hinge hole 2420 and a buffer portion 2430, and the yarn pushing portion 2410 and the buffer portion 2430 are respectively located on both sides of the hinge hole 2420. The hinge hole 2420 is used to cooperate with a screw or other shaft components to hinge the centrifugal yarn pushing rod 240 to the yarn pushing seat 250, the yarn pushing portion 2410 is used to contact and push the transition yarn, and the buffer portion 2430 is used to cooperate with the vibration reduction component 2930 to produce a buffering effect and to rotate and retract the centrifugal yarn pushing rod 240 through the squeezing of the vibration reduction component 2930, so as to remove the yarn ball and insert the paper tube.

[0094] The flow limiting valve 260 is disposed in the auxiliary air hole 1240 between the bypass air passage 1220 and the yarn pushing piston chamber 110 .

[0095] The working principle of the upper head-changing yarn pushing assembly is as follows: compressed air is supplied, the yarn pushing piston rod 220 extends out of the yarn pushing piston chamber 110, and at the same time drives the yarn pushing seat 250 and the centrifugal yarn pushing rod 240 to move synchronously, and the centrifugal yarn pushing rod 240 moves forward in the centrifugal yarn pushing channel 2130, and pushes out the transition yarn attached to the transition slope 2110 in a whole circle. When the compressed air is cut off, the centrifugal yarn pushing rod 240 retracts into the yarn pushing piston chamber 110 under the action of the yarn pushing reset member 230, and at the same time drives the yarn pushing seat 250 and the centrifugal yarn pushing rod 240 to move synchronously, and the centrifugal yarn pushing rod 240 retracts in the centrifugal yarn pushing channel 2130 and resets to the initial position.

[0096] The upper head-changing mechanism 280 includes an upper head-changing piston rod 2810, an upper head-changing reset member 2820, and an upper head-changing cylinder cover 2830. The upper head-changing piston rod 2810 and the upper head-changing reset member 2820 are both arranged in the upper head-changing piston chamber 2160, and the upper head-changing cylinder cover 2830 is arranged at the opening of the upper head-changing piston chamber 2160. The bypass airway 1220 is connected to the upper head-changing piston chamber 2160 by the transition ring airway 2170. An upper head-changing rod inner chamber 2840 is arranged in the upper head-changing piston rod 2810, and the two ends of the upper head-changing reset member 2820 are respectively pressed against the cavity bottoms of the upper head-changing piston chamber 2160 and the upper head-changing rod inner chamber 2840.

[0097] Principle of delayed push-out of the yarn pushing piston rod: In the initial state, the buffer head 2230 of the yarn pushing piston rod 220 closes the main air hole 1230 between the main air channel 1210 and the yarn pushing piston chamber 110. Compressed air is fed into the upper head changing piston chamber 2160 through the bypass air channel 1220, and the upper head changing piston rod 2810 contracts immediately. At the same time, the compressed air enters the yarn pushing piston chamber 110 through the limiting valve 260 between the bypass air channel 1220 and the yarn pushing piston chamber 110. After the buffer head 2230 exits the main air hole 1230 between the main air channel 1210 and the yarn pushing piston chamber 110, the main air channel 1210 is opened, and the yarn pushing piston rod 220 pushes out the transition yarn. In terms of action, the upper head changing piston rod 2810 first retracts into the upper head changing piston chamber 2160, and then the yarn pushing piston rod 220 pushes out the transition yarn.

[0098] Principle of yarn pushing buffer action:

[0099] When the yarn pushing piston rod 220 is pushed out to the end of the stroke, the buffer 2920 contacts the vibration reducing component 2930 for buffering and deceleration. At this time, the centrifugal yarn pushing rod 220 is affected by the vibration reducing component 2930 and rotates tilted to avoid the entry and exit space of the yarn ball and the paper tube; after unloading the yarn, the paper tube is put on to cut off the air source, and the yarn pushing piston rod 220 is reset to retract the yarn pushing piston chamber 110. Since the buffer head 2230 blocks the main air hole 1230, the remaining air is emptied by the flow limiting valve 260 in the bypass airway 1220 as a deceleration buffer. After the yarn pushing piston rod 220 is reset, the centrifugal yarn pushing rod 240 is centrifugally vertical through the rotation of the machine head.

[0100] In this embodiment, the number of the upper head-changing piston chamber 2160 and the number of the centrifugal yarn-pushing channel 2130 are both six and are evenly spaced. In other embodiments, the number of the upper head-changing piston chamber 2160 and the number of the centrifugal yarn-pushing channel 2130 can also be other numbers. Correspondingly, the number of the centrifugal yarn-pushing rod 240 and the upper head-changing piston rod 2810 can also be flexibly configured according to actual needs.

[0101] Corresponding to the drawing machine head disclosed above, the drawing machine for automatically changing the head of the cut-free yarn and pushing out the transition yarn disclosed in the present application and the control method of the machine head thereof are as follows:

[0102] In the head-up step, the compressed air is cut off, the upper head-changing piston rod extends, the centrifugal yarn-pushing rod is retracted along with the yarn-pushing piston rod, the head spindle of the wire drawing machine rotates and swings, the glass fiber enters the upper head-changing piston rod and the upper wire hook, and the yarn is hooked and immediately enters the winding area for wire drawing and winding;

[0103] In the head changing step, when the drum is full, the glass fiber yarn is pushed onto the upper head changing transition ring, the full drum head and the empty head start to switch positions, and the glass fiber yarn enters the upper head changing piston rod and the upper wire hook of the empty head. After the yarn is hooked, it enters the winding area to continue drawing and winding;

[0104] In the yarn pushing step, the compressed air is turned on, and before the yarn pushing piston rod extends out of the yarn pushing piston chamber, the upper head changing piston rod retracts into the upper head changing piston chamber, and at the same time compresses the upper head changing reset part; then, the yarn pushing piston rod extends out of the yarn pushing piston chamber, and the centrifugal yarn pushing rod moves along the centrifugal yarn pushing channel to push the transition yarn down the transition slope, and at the same time compresses the yarn pushing reset part; when the yarn pushing piston rod is pushed out to the end of the stroke, the buffer contacts the vibration reduction component to buffer and decelerate, and at the same time, the centrifugal yarn pushing rod is affected by the vibration reduction component to tilt and rotate;

[0105] The reset step is to cut off the compressed air, and the upper head changing piston rod extends out of the upper head changing piston chamber under the action of the upper head changing reset part; the yarn pushing piston rod retracts into the yarn pushing piston chamber under the action of the yarn pushing reset part, and the centrifugal yarn pushing rod rotates centrifugally vertically as the machine head rotates after the yarn pushing piston rod is reset; when the yarn pushing piston rod is reset and retracted into the yarn pushing piston chamber, the buffer head blocks the main air hole, and the remaining air is discharged through the flow limiting valve in the bypass airway as a deceleration buffer.

[0106] Among them: when changing the head, the cutting of the yarn can be completed by the yarn breaking groove 2140 in cooperation with the automatic yarn breaking mechanism 30, the traction of the yarn can be completed by the slow pulling traction mechanism 50, and the pushing of the yarn can be completed by the push rod 40. The structure and function of the slow pulling traction mechanism 50 and the push rod 40 are explained in the background technology part through the cited literature. The applicant of the technical solution of the automatic yarn breaking mechanism 30 has previously submitted a patent application, which has not yet been disclosed. The patent name and patent number are: a kind of automatic yarn breaking mechanism for a wire drawing machine / 2023231992563. The automatic yarn breaking mechanism mainly includes a rotating shaft, a connecting rod mechanism, and a yarn breaking tool. The rotating shaft is set on the wire drawing machine, the connecting rod mechanism is installed on the rotating shaft, and the yarn breaking tool is installed on the connecting rod mechanism. The orientation of the yarn breaking tool is basically aligned with the yarn breaking groove 2140. When the yarn needs to be broken, the rotating shaft rotates to drive the connecting rod mechanism and the yarn breaking tool to rotate, and the yarn breaking tool is pressed against the yarn breaking groove 2140 to grind or cut the yarn. The yarn breaking tool can be a component with a blade or a wire rope.

[0107] Therefore, the wire drawing machine and its machine head for automatically changing the head and pushing out the transition yarn of the cut-free yarn disclosed in the present application can not only automatically complete the head-changing and head-changing operations of the wire drawing machine through the cooperation of the upper head-changing yarn pushing assembly and the machine head main shaft, but also automatically process the transition yarn formed in the process of head-changing and head-changing, which is conducive to reducing labor intensity, improving the degree of automation, and improving the safety of human-machine cooperation. At the same time, the transition yarn can be pushed out in a whole circle for recycling, thereby increasing the recycling value of the transition yarn and preventing waste yarn and hairiness from polluting the environment.

[0108] The technical scheme and technical effects of the present application are described in detail above in combination with the drawings and specific embodiments of the specification. It should be noted that technicians in this field can also develop other embodiments on this basis; any simple deformation and equivalent substitution that does not deviate from the innovative concept of the present application are covered by the present application and belong to the scope of protection of this patent.

Claims

1. A head of a wire drawing machine for automatically changing the head of a cut-free yarn and pushing out a transition yarn, comprising a head main shaft (10), characterized in that: It also includes an upper head-changing yarn pushing assembly (20), wherein the upper head-changing yarn pushing assembly (20) includes an upper head-changing transition ring (210) and a yarn pushing mechanism; The yarn pushing mechanism comprises a yarn pushing piston rod (220), a yarn pushing reset member (230), a centrifugal yarn pushing rod (240), and a yarn pushing seat (250); The machine head main shaft (10) is provided with a yarn pushing piston chamber (110) and an air passage (120); The upper head-changing transition ring (210) is provided with a transition slope (2110), a transition ring cavity (2120), and a centrifugal yarn pushing channel (2130); The upper head-changing transition ring (210) is arranged at the front end of the machine head main shaft (10), namely, at the opening of the yarn pushing piston chamber (110); The yarn pushing piston rod (220) and the yarn pushing resetting member (230) are both arranged in the yarn pushing piston chamber (110); The yarn pushing seat (250) is arranged at the end of the yarn pushing piston rod (220) and is located in the transition annular cavity (2120); the centrifugal yarn pushing rod (240) is hinged on the yarn pushing seat (250) and is located in the centrifugal yarn pushing channel (2130); The upper head-changing transition ring (210) is also provided with a yarn-breaking groove (2140) and an upper wire hook (2150); The yarn breaking groove (2140) and the upper wire hook (2150) are respectively located on both sides of the transition slope (2110), and the yarn breaking groove (2140) is located at a position close to the machine head main shaft (10); The upper head-changing yarn pushing assembly (20) further comprises an upper head-changing mechanism (280), wherein the upper head-changing mechanism (280) comprises an upper head-changing piston rod (2810), an upper head-changing resetting member (2820), and an upper head-changing cylinder cover (2830); An upper head-changing piston chamber (2160) is provided on the upper head-changing transition ring (210), and the upper head-changing piston chamber (2160) extends in the radial direction of the upper head-changing transition ring (210); The upper head-changing piston rod (2810) and the upper head-changing reset member (2820) are both arranged in the upper head-changing piston chamber (2160), and the upper head-changing cylinder cover (2830) is arranged at the opening portion of the upper head-changing piston chamber (2160).

2. According to claim 1, the drawing machine head for automatically changing the head of the cut-free yarn and pushing out the transition yarn is characterized by: An upper head-changing rod inner cavity (2840) is provided on the upper head-changing piston rod (2810), and two ends of the upper head-changing reset member (2820) respectively abut against the bottom of the upper head-changing piston cavity (2160) and the upper head-changing rod inner cavity (2840).

3. The drawing machine head for automatically changing the head of the cut-free yarn and pushing out the transition yarn according to claim 1 is characterized by: The airway (120) comprises a main airway (1210) and a bypass airway (1220); The yarn pushing piston rod (220) comprises a piston portion (2210), a push rod portion (2220), and a buffer head (2230), wherein the buffer head (2230) and the push rod portion (2220) are respectively arranged on both sides of the piston portion (2210); The bypass air channel (1220) is connected to the yarn pushing piston chamber (110) and has an auxiliary air hole (1240) formed in the middle, and a flow limiting valve (260) is arranged in the auxiliary air hole (1240); The main air channel (1210) is connected to the yarn pushing piston chamber (110) and has a main air hole (1230) formed in the middle. The buffer head (2230) can close or open the main air hole (1230).

4. The drawing machine head for automatically changing the head of the cut-free yarn and pushing out the transition yarn according to claim 3 is characterized by: A positioning retaining ring (2180) is also provided at a portion of the transition ring cavity (2120) used for communicating with the yarn pushing piston cavity (110), and the yarn pushing resetting member (230) is provided between the piston portion (2210) of the yarn pushing piston rod (220) and the positioning retaining ring (2180).

5. The drawing machine head for automatically changing the head of the cut-free yarn and pushing out the transition yarn according to claim 4 is characterized by: The upper head-changing yarn pushing assembly (20) further comprises a retaining ring (270), and the yarn pushing resetting member (230) is arranged between the piston portion (2210) of the yarn pushing piston rod (220) and the retaining ring (270).

6. The drawing machine head for automatically changing the head of the cut-free yarn and pushing out the transition yarn according to claim 1 is characterized by: A transition ring air channel (2170) is also provided on the upper head-changing transition ring (210), and the transition ring air channel (2170) is connected to the upper head-changing piston chamber (2160).

7. The drawing machine head for automatically changing the head of the cut-free yarn and pushing out the transition yarn according to claim 1 is characterized by: The head of the wire drawing machine for automatically changing the head of the cut-free yarn and pushing out the transition yarn further comprises a yarn pushing buffer mechanism (290); the yarn pushing buffer mechanism (290) comprises a cover plate (2910), and the cover plate (2910) is arranged at the end of the upper head changing transition ring (210).

8. The drawing machine head for automatically changing the head of the cut-free yarn and pushing out the transition yarn according to claim 7 is characterized by: The yarn pushing buffer mechanism (290) further comprises a buffer (2920) and a vibration reduction component (2930); The buffer (2920) is arranged on the yarn pushing piston rod (220) and / or the yarn pushing seat (250), and the vibration-damping component (2930) is arranged on the cover plate (2910).

9. The drawing machine head for automatically changing the head of the cut-free yarn and pushing out the transition yarn according to claim 1 is characterized by: The centrifugal yarn pushing rod (240) comprises a yarn pushing portion (2410), a hinge hole (2420) and a buffer portion (2430), wherein the yarn pushing portion (2410) and the buffer portion (2430) are respectively located on two sides of the hinge hole (2420).

10. A wire drawing machine with automatic head change and transition yarn ejection for cut-free yarn, characterized by: It comprises a wire drawing machine head for automatically changing the head of the cut-free yarn and pushing out the transition yarn according to any one of claims 1 to 9.

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