A comb-type wire break protection device for a stranding machine

Abstract

The present invention provides a comb-type wire-breaking protection for a stranding machine, which is installed between a three-groove arc-high wheel and a four-groove arc-high wheel at the wire-breaking position of the stranding machine. The steel cord enters the four-groove arc-high wheel and is wound and routed between the four-groove arc-high wheel and the three-groove arc-high wheel for three turns. The three sections of steel cord between the four-groove arc-high wheel and the three-groove arc-high wheel correspond to each other and pass through the working grooves at the upper and lower ends of the comb-type wire-breaking protection. The comb-type wire-breaking protection is an independent component, fixed on a cable arrangement bracket but separated by a nylon spacer, and connected to the wire-breaking protection point of the stranding machine only by a connecting screw and a wire-breaking protection signal line. Once the fluctuation amplitude of the steel cord is too large and jumps out of the arc-high wheel, it will touch the groove wall or the groove bottom of the working groove, contact the comb-type wire-breaking protection and trigger the wire-breaking protection signal, thereby immediately alarming and notifying employees to check or unload the wheel, reducing the probability of steel cords producing hard bends, springs and other unqualified products, and improving product quality.

Description

Technical Field

[0001] The invention relates to a stranding machine take-up comb type breaking protection, which is suitable for a stranding outer take-up machine type in the production of steel cords. Background Art

[0002] At present, the steel cord production often uses the DT2G / 3G and XD-6 / 12 external take-up machines with standard arc height wheels to control the cord product quality. In the existing DT2G / 3G external take-up and stranding machines, although the constant tension system is installed to ensure the stability of the take-up and pay-off tension, the following defects still exist in the actual production process of the external stranding machine:

[0003] 1. When the DT2G / 3G machine tool is running with constant tension, due to fluctuations in the tension of wire taking-up and wire paying-out, as well as other special circumstances, the cord will detach from the arc-high wheel at the wire taking-up position, especially at the arc-high wheel, causing the cord to bend hard, produce springs and other unqualified products.

[0004] 2. The arc-high wheel is installed at the wire collection part of DT2G / 3G machine tools, which is divided into two types: three-slot + four-slot combination assembly and two-slot + three-slot combination assembly. Since the average depth of the arc-high wheel groove bottom is only about 3-4 mm, employees often put two cords in one groove during operation, causing two cords to run in the same groove. If the employees fail to check and correct in time, the cords will rub against each other, resulting in scratches on the cord surface.

[0005] 3. The DT2G / 3G machine tool is equipped with an arc-height wheel for winding. The distance between the two guide wheels is about 35 mm, and an angle is formed between the cord and the arc-height wheel. If employees are not careful when winding the wire, they may accidentally wrap their fingers in the angle of the arc-height wheel, thus causing work-related accidents.

[0006] In order to solve the above production problems, our company has designed a comb-type wire break protection device for the stranding machine, which is designed to monitor the tension fluctuation of the steel cord, quickly and accurately feedback abnormal working conditions such as steel cord breakage and slot jumping, and promptly alarm, and protect the debugging safety of employees, effectively improve the production quality of steel cord and prevent safety hazards. Summary of the invention

[0007] The present invention mainly solves the following technical problems:

[0008] When the stranding machine is running, the steel cord may break, bend hard, have springs, or run in the same groove due to excessive tension fluctuations or improper operation by employees. These problems cannot be corrected through timely alarms and debugging, resulting in unqualified finished steel cord products. In addition, the safety of employees during operation cannot be guaranteed.

[0009] The technical solution adopted by the present invention is:

[0010] A comb-type wire break protector for a stranding machine, which is installed between a three-groove arc-high wheel and a four-groove arc-high wheel at the wire-taking position of the stranding machine, the steel cord is fed from the four-groove arc-high wheel, and is wound around the four-groove arc-high wheel and the three-groove arc-high wheel for three turns, and the upper and lower three sections of steel cord between the four-groove arc-high wheel and the three-groove arc-high wheel all pass through the comb-type break protector;

[0011] The comb-type short-circuit breaker includes a short-circuit breaker body, a nylon spacer, a fixed inner rod, a connecting screw and a short-circuit breaker signal line; three working grooves are respectively arranged at the upper and lower ends of the short-circuit breaker body, and the upper and lower three sections of steel cord between the four-slot arc high wheel and the three-slot arc high wheel respectively pass through the three working grooves at the upper and lower ends of the short-circuit breaker body, and each section of steel cord passes through a corresponding working groove, and a gap is left between the groove bottom and the groove walls on both sides of the working groove and the steel cord passing through it; a fixed through hole is also provided on the short-circuit breaker body, and the nylon spacer is wrapped inside the fixed through hole, and the fixed inner rod passes through the nylon spacer and fixes the short-circuit breaker body on the stranding machine, and the nylon spacer isolates the short-circuit breaker body from the stranding machine and the fixed inner rod and makes the short-circuit breaker body form a separate component, and the connecting screw is installed on the short-circuit breaker body and serves as the wiring post of the comb-type short-circuit breaker, and the short-circuit breaker signal line is led out from the PLC short-circuit breaker point of the stranding machine and connected to the connecting screw and used for short-circuit breaker signal transmission.

[0012] Preferably, the steel cord is located in the middle of the working groove where it is located.

[0013] Preferably, the bottom height of the working groove is 5 mm lower than the height of the steel cord passing therethrough in a static state.

[0014] Preferably, the average spacing between the three working grooves at the upper end of the break protector body is 4.5 mm, and the groove width is 3.5 mm. The average spacing between the three working grooves at the lower end of the break protector body is 4.5 mm, and the groove width is 3.5 mm. The working grooves match the groove center distance of the four-groove arc height wheel and the three-groove arc height wheel.

[0015] Preferably, anti-pinch guard edges are respectively provided on both sides of the break protection body, and the outer contour edge of the anti-pinch guard edge is a concave arc. One side of the anti-pinch guard edge is close to the four-slot arc height wheel and the contour shape matches, and the other side of the anti-pinch guard edge is close to the three-slot arc height wheel and the contour shape matches.

[0016] Preferably, the upper and lower heights of the anti-pinch finger guard are respectively consistent with the bottom heights of the working grooves at the upper and lower ends of the break protector body.

[0017] Preferably, the distances between the anti-pinch guard edge and the four-groove arc-high wheel and the three-groove arc-high wheel are both less than 3 mm.

[0018] Preferably, each fixed through hole on the safety body is provided with two nylon spacers, which are respectively inserted from both ends of the fixed through hole to wrap the end and interior of the fixed through hole, and the fixed inner rod is fixed on the stranding machine through the nylon spacers.

[0019] Preferably, the number of the fixed through holes is two, the number of the matching fixed inner rods is two, and the number of the nylon spacers is four.

[0020] Preferably, a gasket is provided between the nylon spacer and the stranding machine.

[0021] Beneficial effects of the present invention:

[0022] Compared with the prior art, the comb-type wire break protection structure of the stranding machine of the present invention is compact and has both steel cord broken wire detection and finger pinching prevention functions. Once tension fluctuations occur during the wire taking-up process outside the stranding machine, causing the steel cord to detach from the arc high wheel, resulting in hard bending of the steel cord, springs and other unqualified products, or even wire breakage, an alarm will be issued in time, greatly improving the product quality and pass rate of steel cord products.

[0023] The comb-type wire-breaking protection for the stranding machine of the present invention is generally applicable to various types of stranding machines with external wire taking-up and arc-high wheels. It has a wide range of applications and low cost for transformation projects. It can be easily and quickly installed on existing models. At present, the success rate of the wire-breaking protection action has reached 100% after installation in our company, and at the same time, it greatly saves production costs, safety costs and quality costs. BRIEF DESCRIPTION OF THE DRAWINGS

[0024] Figure 1 It is a schematic diagram of the installation structure of the comb-type wire breaking protection of the stranding machine of the present invention;

[0025] Figure 2 for Figure 1 Partial cross-section along the AA direction;

[0026] Figure 3 It is a schematic diagram of the overall structure of the comb-type fuse of the present invention;

[0027] Figure 4 A side view of the comb-type fuse of the present invention;

[0028] Figure 5 for Figure 4 Partial cross-section along the FF direction.

[0029] Among them, guide tube-1, wire passing wheel-2, four-groove arc high wheel-3, three-groove arc high wheel-4, strong magnet-5, steel cord-6, comb-type breaking protection-7, wire arrangement bracket-8;

[0030] The safety cut-off body 71, the nylon spacer 72, the fixed inner rod 73, the connecting screw 74, the safety cut-off signal line 75, the anti-pinch finger retaining edge 76, the working groove 711, and the fixed through hole 712. Implementation

[0031] In order to provide a further understanding of the purpose, structure, features, and functions of the present invention, the following detailed description is given in conjunction with the embodiments.

[0032] The external wire twisting machine currently used in production is Figure 1 For example, a guide tube 1, a wire passing wheel 2, a four-slot arc high wheel 3, a three-slot arc high wheel 4 and a strong magnet 5 are installed on the wire arrangement bracket 8 at the wire taking-up position, and the steel cord 6 passes through the guide tube 1, the wire passing wheel 2, the four-slot arc high wheel 3 and the three-slot arc high wheel 4 in sequence after entering the wire, wherein the steel cord 6 is wrapped around the four-slot arc high wheel 3 and the three-slot arc high wheel 4 three times, and then directly exits the four-slot arc high wheel 3 to the finished wire taking-up I-shaped wheel, wherein the four-slot arc high wheel 3 and the three-slot arc high wheel 4 are respectively assembled by four-piece arc high wheels and three-piece arc high wheels, and are fixed to the wire arrangement bracket 8 with bolts, and the strong magnet 5 is fixed to the upper left corner of the wire arrangement bracket 8 with an inner rod, and is usually used for threading and adsorbing the steel cord 6. When the stranding machine is operating normally, the steel cord 6 is routed in the middle position of the groove of the four-groove arc height wheel 3 and the three-groove arc height wheel 4, and there is only one section of steel cord 6 in each groove. Since the groove depth of the arc height wheel is usually only about 3-4 mm, wire jumping out of the groove, routing in the same groove, wire jamming and even wire breaking often occur. Therefore, the main purpose of the present invention is to monitor the abnormal fluctuation of the steel cord 6 between the two arc height wheels, and to promptly alarm once abnormal fluctuation of the steel cord 6 occurs.

[0033] like Figure 1-5 As shown, a comb-type breaking protector 7 for a stranding machine of the present invention is installed between a three-groove arc-high wheel 4 and a four-groove arc-high wheel 3 at the stranding machine's wire taking-up position. The four-groove arc-high wheel 3 and the three-groove arc-high wheel 4 are located on both sides of the comb-type breaking protector 7 to form a symmetrical installation. The steel cord 6 enters from the four-groove arc-high wheel 3 and is wound around the four-groove arc-high wheel 3 and the three-groove arc-high wheel 4 for three turns. The upper and lower three sections of steel cord 6 between the four-groove arc-high wheel 3 and the three-groove arc-high wheel 4 all pass through the comb-type breaking protector 7.

[0034] like Figure 3-5As shown, the comb-type break protector 7 includes a break protector body 71, a nylon spacer 72, a fixed inner rod 73, a connecting screw 74 and a break protector signal line 75; three working grooves 711 are respectively arranged at the upper and lower ends of the break protector body 71, and the upper and lower three sections of steel cord 6 between the four-groove arc high wheel 3 and the three-groove arc high wheel 4 respectively pass through the three working grooves 711 at the upper and lower ends of the break protector body 71, and each section of steel cord 6 passes through a corresponding working groove 711, and a gap is left between the groove bottom and the groove walls on both sides of the working groove 711 and the steel cord 6 passing through it; the upper and lower ends of the break protector body 71 are provided with three working grooves 711, and the upper and lower ends of the steel cord 6 passing through ... A fixed through hole 712 is also provided, and a nylon spacer 72 is wrapped inside the fixed through hole 712. The fixed inner rod 73 passes through the nylon spacer 72 and fixes the safety guard body 71 on the stranding machine. The nylon spacer 72 isolates the safety guard body 71 from the stranding machine and the fixed inner rod 73 and makes the safety guard body 71 a separate component. A connecting screw 74 is installed on the safety guard body 71 and serves as a terminal post of the comb-type safety guard 7. The safety guard signal line 75 is led out from the PLC safety guard point of the stranding machine and connected to the connecting screw 74 and is used for safety guard signal transmission.

[0035] The working principle of the present invention is as follows: a comb-shaped break protector 7 is installed between the four-groove arc-high wheel 3 and the three-groove arc-high wheel 4, and three working grooves 711 are set at the upper and lower ends of the comb-shaped break protector 7, which respectively correspond to the upper three sections of the steel cord 6 and the lower three sections of the steel cord 6 after the steel cord 6 is wound three times between the four-groove arc-high wheel 3 and the three-groove arc-high wheel 4. Each section of the steel cord 6 passes through a corresponding working groove 711 and does not contact the side wall and bottom of the working groove 711. There are certain tension fluctuations in the stranding machine during the actual production process, while the winding tension fluctuations under normal conditions are small, and the steel cord 6 will not jump out of the grooves of the four-groove arc-high wheel 3 and the three-groove arc-high wheel 4, nor will it touch the working groove 711 of the comb-type breaking guard 7, and thus no alarm will be issued; when the tension fluctuation of the steel cord 6 is too large and causes it to jump out of its own groove, or the thin wire breaks, it will inevitably touch the groove wall or groove bottom of the comb-type breaking guard 7 working groove 711, and the breaking guard body 71 is connected to the PLC breaking guard point of the external winding and stranding machine through the connecting screw 74 and the breaking guard signal line 75, so a breaking guard signal is immediately issued, the machine tool stops and an alarm is sounded, reminding employees to check or unload the wheel.

[0036] The safety protector body 71 is fixed to the cable arrangement bracket 8 of the stranding machine through a fixed inner rod 73, but a nylon spacer 72 is also installed in the fixed through hole 712 for installing the fixed inner rod 73. The nylon spacer 72 is an insulating component, which can completely separate the safety protector body 71 from the cable arrangement and the fixed inner rod 73, so that the safety protector body 71 becomes an independent component, and is only connected to the PLC safety protector point of the stranding machine through the connecting screw 74 as a terminal post and the safety protector signal line 75 as a connection. When the steel cord 6 touches the safety protector body 71, a loop is formed and a safety protector signal is sent to the machine tool. When the steel cord 6 does not touch the safety protector body 71, the safety protector signal will not be triggered.

[0037] In one embodiment, the steel cord 6 is located in the middle position of the working groove 711 where it is located. Since the comb-type breaking protector 7 of the present invention relies on whether the steel cord 6 touches the working groove 711 of the comb-type breaking protector 7 during the jumping process to judge whether the fluctuation of the steel cord 6 is within the normal range, the steel cord 6 is set in the middle position of the working groove 711, which can make the steel cord 6 have the same margin for jumping in the left and right directions. Once the fluctuation amplitude to the left or right is too large so that it touches the two side walls of the working groove 711, it means that the steel cord 6 may skew left and right when routing and jump out of the arc height wheel groove where it was originally located, jump into other grooves, or jump out of the arc height wheel and get stuck in the arc height wheel and the wire arrangement bracket 8, or even the steel cord 6 has already broken, which can achieve a better monitoring effect.

[0038] In a more preferred embodiment, the bottom height of the working groove 711 is 5 mm lower than the height of the steel cord 6 passing through it in a static state. Under normal circumstances, the amplitude of the up and down fluctuation of the steel cord 6 between the four-groove arc-high wheel 3 and the three-groove arc-high wheel 4, and the unilateral downward fluctuation is within 5 mm, will not cause the cord to jump out of the groove of the arc-high wheel. Therefore, the bottom height of the working groove 711 is set to be 5 mm lower than the height of the steel cord 6 in the static state. Once the amplitude of the up and down fluctuation of the steel cord 6 is equal to or greater than 5 mm, that is, the steel cord 6 may jump out of the groove of the arc-high wheel or the tension is too large to cause the quality of the steel cord 6 to be unqualified, it will inevitably touch the bottom of the working groove 711 where it is located to issue an alarm, thereby effectively reducing the defective products such as spring and hard bend of the steel cord 6.

[0039] In a preferred embodiment, the average spacing between the three working grooves 711 at the upper end of the break protection body 71 is 4.5 mm, and the groove width is 3.5 mm. The average spacing between the three working grooves 711 at the lower end of the break protection body 71 is 4.5 mm, and the groove width is 3.5 mm. The working grooves 711 match the groove center distances of the four-groove arc high wheel 3 and the three-groove arc high wheel 4, so that the jumping of the steel cord 6 in the working groove 711 can fully simulate whether the steel cord 6 will jump out of the groove when jumping in the four-groove arc high wheel 3 and the three-groove arc high wheel 4. At the same time, the groove spacing and groove width data in this embodiment are the best embodiment obtained by combining the normal jumping distance in the actual production process of the current external wire-winding stranding machine. After experimental comparison, the detection result under this data is the most accurate.

[0040] The present invention not only solves the quality problems of the steel cord 6 caused by broken wires, jumper wires, stuck wires, and same-groove routing of the steel cord 6, and timely detects and issues an alarm, but also solves the safety problem of workers accidentally inserting their fingers into the gap between the steel cord 6 and the arc height wheel during inspection, debugging, and wheel unloading after the alarm, causing hand pinching.

[0041] To solve the above safety issues, in one embodiment, the present invention provides finger-trap protection edges 76 on both sides of the protection body 71, and the outer contour edge of the finger-trap protection edges 76 is an inwardly concave arc. One side of the finger-trap protection edge 76 is close to the four-groove arc-high wheel 3 and the contour shape matches, and the other side of the finger-trap protection edge 76 is close to the three-groove arc-high wheel 4 and the contour shape matches. The anti-hand-trap protection edge is twisted according to the shape of the arc-high wheel adjacent to it, close to the arc-high wheel and fills the space between the four-groove arc-high wheel 3, the three-groove arc-high wheel 4 and the steel cord 6, so that the gap between the steel cord 6 and the arc-high wheel is smaller than the size of the finger, so as to prevent the operator from accidentally extending his finger and being pinched.

[0042] In a more preferred embodiment, the upper and lower heights of the anti-pinch guard 76 are respectively consistent with the bottom heights of the working groove 711 at the upper and lower ends of the broken wire protection body 71. The purpose is to prevent the steel cord 6 from touching the bottom of the working groove 711 of the comb-type broken wire protection 7 due to slight shaking at the arc height wheel during actual production, causing a false broken wire alarm of the steel cord 6, thereby improving the accuracy of the alarm.

[0043] In a more preferred embodiment, the distance between the anti-pinch guard 76 and the four-groove arc height wheel 3 and the three-groove arc height wheel 4 is less than 3 mm, further preventing employees from accidentally inserting their fingers into the gap between the arc height wheel and the steel cord 6, thereby ensuring production safety.

[0044] In one embodiment, each fixed through hole 712 on the safety guard body 71 is provided with two nylon spacers 72, and the two nylon spacers 72 are respectively inserted from both ends of the fixed through hole 712, so that the installation is more convenient and quick. The two nylon spacers 72 can better wrap the two ends and the inside of the fixed through hole 712, and completely isolate the safety guard body 71 from the stranding machine and the fixed inner rod 73. The fixed inner rod 73 is fixed on the stranding machine through the nylon spacer 72. In this way, the safety guard body 71 is fixed and the safety guard body 71 becomes a completely independent component. After the signal line is connected to the PLC safety guard point of the machine tool, it is possible to completely judge whether the tension fluctuation of the steel cord 6 is abnormal based on whether the steel cord 6 touches the safety guard body 71.

[0045] In a more preferred embodiment, there are two fixing through holes 712, two matching fixed inner rods 73, and four nylon spacers 72. The two fixing through holes 712 are symmetrically arranged up and down, and the safety body 71 itself is a symmetrical structure, so it can achieve a better fixing effect and prevent loosening.

[0046] Preferably, a gasket is provided between the nylon spacer 72 and the stranding machine, and the thickness of the gasket is between 2-5 mm. The gasket is installed so that the comb-type break protector 7 can be fine-tuned left and right during installation, thereby ensuring that the steel cord 6 can be in the middle position of the working groove 711 of the comb-type break protector 7.

[0047] As mentioned above, the comb-type wire break protection for the stranding machine of the present invention has a compact structure. In addition to being applicable to the stranding machine of the three-slot + four-slot combination assembly in the embodiment, it is also applicable to the stranding machine of the two-slot + three-slot combination assembly, and is suitable for various types of stranding machines equipped with arc-high wheels for external wire take-up. It has strong versatility and low cost for transformation projects. It has been used as a new standard for our company's external wire take-up machines. The comb-type wire break protection for the stranding machine of the present invention has both broken wire detection and anti-pinch finger functions; once the abnormal tension of the steel cord causes it to jump out of the arc-high wheel or break, it can immediately detect and alarm, and promptly attract staff to check and repair. The success rate of the wire break protection action reaches 100%, effectively reducing defective products such as springs and hard bends of the steel cord, and improving product quality; at the same time, the anti-pinch finger guard fills and blocks all the gaps between the steel cord and the arc-high wheel, preventing employees from accidentally inserting their fingers and getting pinched when repairing after receiving the alarm.

[0048] The present invention has been described by the above-mentioned relevant embodiments, however, the above-mentioned embodiments are only examples for implementing the present invention. It must be pointed out that the disclosed embodiments do not limit the scope of the present invention. On the contrary, changes and modifications made without departing from the spirit and scope of the present invention are all within the scope of patent protection of the present invention.

Claims

1. A comb-type wire break protection for a stranding machine, characterized in that: It is installed between the three-groove arc high wheel and the four-groove arc high wheel at the take-up position of the stranding machine. The steel cord enters from the four-groove arc high wheel and is wound around the four-groove arc high wheel and the three-groove arc high wheel for 3 turns. The upper and lower three sections of steel cord between the four-groove arc high wheel and the three-groove arc high wheel all pass through the comb-type breaking guard, and the steel cord is located in the middle of the working groove where it is located; The comb-type breakers include a breakers body, a nylon spacer, a fixed inner rod, a connecting screw and a breakers signal line; three working grooves are respectively arranged at the upper and lower ends of the breakers body, and the upper and lower three sections of steel cords between the four-groove arc-high wheel and the three-groove arc-high wheel respectively pass through the three working grooves at the upper and lower ends of the breakers body, and each section of steel cord passes through a corresponding working groove, and a gap is left between the bottom and the groove walls on both sides of the working groove and the steel cord passing through them; a fixed through hole is also provided on the breakers body, the nylon spacer is wrapped inside the fixed through hole, the fixed inner rod passes through the nylon spacer and fixes the breakers body on the stranding machine The nylon spacer isolates the break protector body from the stranding machine and the fixed inner rod and makes the break protector body a separate component. The connecting screw is installed on the break protector body and serves as a wiring terminal of the comb-type break protector. The break protector signal line is led out from the PLC break protector point of the stranding machine and connected to the connecting screw and is used for break protector signal conduction. Anti-pinch guards are respectively provided on both sides of the break protector body. The outer contour edge of the anti-pinch guard is a concave arc. One side of the anti-pinch guard is close to the four-slot arc high wheel and the contour shape matches, and the other side of the anti-pinch guard is close to the three-slot arc high wheel and the contour shape matches.

2. The comb-type wire break protection device for a stranding machine as claimed in claim 1, characterized in that: The bottom height of the working groove is 5 mm lower than the height of the steel cord passing therethrough in a static state.

3. The comb-type wire break protection device for a stranding machine as claimed in claim 2, characterized in that: The average spacing between the three working grooves at the upper end of the break protector body is 4.5 mm, and the groove width is 3.5 mm. The average spacing between the three working grooves at the lower end of the break protector body is 4.5 mm, and the groove width is 3.5 mm. The working grooves match the groove center distances of the four-groove arc height wheel and the three-groove arc height wheel.

4. The comb-type wire break protection device for a stranding machine as claimed in claim 1, characterized in that: The upper and lower heights of the anti-pinch finger guard are respectively consistent with the bottom heights of the working grooves at the upper and lower ends of the break protector body.

5. The comb-type wire break protection device for a stranding machine as claimed in claim 4, characterized in that: The distances between the anti-pinch guard edge and the four-groove arc-high wheel and the three-groove arc-high wheel are all less than 3 mm.

6. The comb-type wire break protection device for a stranding machine as claimed in claim 1, characterized in that: Each fixed through hole on the break protector body is equipped with two nylon spacers, which are respectively inserted from both ends of the fixed through hole to wrap the end and interior of the fixed through hole. The fixed inner rod passes through the nylon spacers and is fixed on the stranding machine.

7. The comb-type wire break protection device for a stranding machine as claimed in claim 6, characterized in that: The number of the fixed through holes is two, the number of the matching fixed inner rods is two, and the number of the nylon spacers is four.

8. The comb-type wire break protection device for a stranding machine as claimed in claim 7, characterized in that: A gasket is also provided between the nylon spacer and the stranding machine.

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