Multi-layer braided rope with tail end protection and preparation method thereof

Abstract

The present invention discloses a multi-layer braided rope with tail end protection and a preparation method thereof, which relates to the field of rope preparation, and comprises a rope skin (1), a rope core (2) and an eyelet (3), wherein the rope core (2) is arranged to be composed of a plurality of braided ropes arranged in parallel, and the eyelet (3) is arranged to be a combination of annular structures of the same diameter formed by inserting the end of each braided rope into a hollow position inside the rope body, and the rope skin (1) is arranged outside the rope core (2), and the starting point of its braiding is arranged at the intersection of the eyelet (3) on the rope core (2). The present invention has a simple structure, the rope core and the eyelet are arranged in an integrated manner, and the rope skin is arranged outside the rope core, so that the eyelet plug-in part and the rope core are protected by the rope skin at the same time, thereby improving the fixing force and wear resistance of the eyelet, ensuring the protective performance of the rope skin on the rope and the strength of the overall rope; the plugged eyelet is not easy to be pulled out, thereby extending the service life of the rope and improving the overall use performance of the multi-layer braided rope.

Description

Technical Field

[0001] The invention relates to the field of rope preparation, in particular to a multi-layer braided rope with tail end protection and a preparation method thereof. Background Art

[0002] In the past, the tail end of multi-layer braided ropes was processed by peeling off the rope skin at the rope end to expose the rope core after the rope was braided, and then braiding the eyelet. As a result, the rope core part without rope skin protection was exposed too much, especially the eyelet plug-in part, which often became the weak point of the rope, with low strength, poor wear resistance, and the plugged eyelet was easily pulled out. Summary of the invention

[0003] In order to solve the above-mentioned technical problems, the present invention provides a multi-layer braided rope with tail end protection and a preparation method thereof, which increases the working load at the eyelet working point, is easy to use, and ensures the protective performance of the rope skin on the rope core.

[0004] The technical solution adopted by the present invention to solve the technical problem is:

[0005] A multi-layer braided rope with tail end protection comprises a rope sheath, a rope core and an eyelet, wherein the rope core is arranged to be composed of a plurality of braided ropes arranged in parallel, the eyelet is arranged to be a combination of annular structures of the same diameter formed by inserting the ends of each braided rope into the hollow position inside the rope body, the rope sheath is arranged outside the rope core, and the starting point of its braiding is arranged at the intersection of the eyelets on the rope core.

[0006] The eye ring is provided in single or double configurations.

[0007] An eye ring protection piece is arranged on the eye ring.

[0008] A method for preparing a multi-layer braided rope with tail end protection is achieved by the following steps:

[0009] 1) Rope core preparation: braid the rope core according to the required materials and parameters, prepare single or multiple braided ropes according to the normal braiding procedure, and place multiple ropes in parallel to form the rope core;

[0010] 2) Rope core tail end processing: first calculate the length L of the rope core tail end that needs to be buried 1 , measure L from the end of the rope core 1 length and marked as Z on the surface of the rope core 1 Point; from Z 1 Start measuring the inner diameter of the eye ring from point L 2 , from Z 1 Measure L from the point towards the rope body. 2 length and marked as Z on the surface of the rope core 2 point;

[0011] The tail end of the rope core is processed into a cone, and the cone rope end is connected to the traction needle by direct core insertion. 2 Insert the rope directly into the hollow interior of the rope core at the point where the rope is inserted, making sure that the rope core is not kinked or twisted during insertion;

[0012] When the tapered end of the embedded rope core is inserted into Z 1 Point and Z 2 When the points coincide, the traction needle is passed through the rope strand and the tapered rope end is brought out, and the rope core is pulled so that the tail end of the rope core is withdrawn into the hollow rope body, thereby forming an eye ring. Similarly, an eye ring at the other end of the rope core can be made as needed;

[0013] 3) Rope skin preparation: braid the strands of rope skin according to the required materials and parameters, and install the rope skin yarn tube on the high-speed braiding machine for standby;

[0014] 4) Tail end protection braiding: First, braid the strands of the rope skin for a certain length, and then introduce the rope core with braided eyelets from the bottom of the high-speed braiding machine between the rope strands of the rope skin. The position where the rope skin starts to be braided is at the bottom of the intersection of the eyelets, that is, Z 1 With Z 2 The overlap of the rope skin is precisely controlled by the equipment, so that the eyelet and the outside of the rope core have the same braiding density;

[0015] If the rope core is provided with an eyelet at only one end, the rope skin can be woven to completely cover the rope core, and the rope skin can be fixed at the tail end of the rope to prevent the rope skin from unraveling;

[0016] If both ends of the rope core are provided with eyelets, the rope skin is woven to the intersection of the eyelets at the other end, i.e. Z 1 With Z 2 When the rope ends overlap, stop the high-speed braiding machine, pass the eyelet at this end through the rope skin and rope strands, and then start the high-speed braiding machine again. After braiding the rope skin strands for a distance, complete the rope tail end protection treatment to prevent the rope skin from spreading;

[0017] 5) Eye protection treatment: install an eye protection piece before the tapered end of the rope core is inserted into the rope core body, or form a protective layer on the outside of the eye by conventional manual winding of a thin rope.

[0018] The fixing method of the rope skin end to prevent the rope skin from unraveling can be a method of wrapping with tape or thermoplasticizing with a thermoplastic tube.

[0019] The rope skin braiding density in step 4) is set in the range of 3-6 times the braiding diameter.

[0020] Step 2) Wrap tape around the tapered end of the rope core to secure the tapered tip.

[0021] A plurality of braided ropes in the rope core are individually woven into a ring structure with the same diameter and are combined together to form an eye ring.

[0022] The plurality of braided ropes of the rope core are placed side by side and fixed by a die or by winding with thin ropes.

[0023] The invention has a simple structure, in which the rope core and the eyelet are integrated, and a rope skin is arranged on the outside of the rope core, so that the rope core is braided and buried with the eyelet without damaging the rope skin, so that the eyelet plug-in part and the rope core are protected by the rope skin at the same time, thereby improving the fixing force and wear resistance of the eyelet, ensuring the protection performance of the rope skin on the rope and the strength of the overall rope; the plug-in eyelet is not easy to be pulled out, thereby extending the service life of the rope; the eyelet integrated with the rope core can realize quick hooking, thereby improving the convenience of rope use, ensuring the strength and firmness of the rope, and improving the overall use performance of the multi-layer braided rope; the preparation method of the overall multi-layer braided rope is simple and easy to operate, especially in heavy lifting, fishery and other industrial fields, it greatly facilitates customer use, reduces labor processing costs, and is suitable for large-scale promotion and application. BRIEF DESCRIPTION OF THE DRAWINGS

[0024] Figure 1 It is a schematic diagram of the structure of the present invention;

[0025] Figure 2 It is the production principle diagram of the present invention;

[0026] Figure 3 It is a manufacturing process diagram of the present invention;

[0027] Figure 4 It is a schematic diagram of the finished product of the present invention. DETAILED DESCRIPTION

[0028] The present invention is described in detail below with reference to the accompanying drawings and specific embodiments:

[0029] like Figure 1 As shown, a multi-layer braided rope with tail end protection comprises a rope skin 1, a rope core 2 and an eyelet 3, wherein the rope core 2 is arranged to be composed of a plurality of braided ropes arranged in parallel, and the eyelet 3 is arranged to be a combination of annular structures of the same diameter formed by inserting the ends of each braided rope into the hollow position inside the rope body, the rope skin 1 is arranged outside the rope core 2, and the starting point of its braiding is arranged at the intersection of the eyelet 3 on the rope core 2.

[0030] According to different needs, the eye ring 3 is provided as a single one or two.

[0031] As a preferred embodiment, the eye ring 3 is provided with an eye ring protector, which can be added during the eye ring weaving process or after the eye ring is weaved.

[0032] like Figure 2-4As shown, a method for preparing a multi-layer braided rope with tail end protection is achieved by the following steps:

[0033] 1) Rope core preparation: braid the rope core 2 according to the required materials and parameters, prepare a single or multiple braided ropes according to the normal braiding procedure, and place multiple ropes in parallel to form the rope core 2;

[0034] 2) Rope core tail end processing: First calculate the length L of the rope core 2 tail end that needs to be buried 1 , measure L from the end of rope core 2 1 length and marked as Z on the surface of rope core 2 1 Point; from Z 1 Start measuring the inner diameter of eye ring 3 from point L 2 , from Z 1 Measure L from the point towards the rope body. 2 length and marked as Z on the surface of rope core 2 2 point;

[0035] The tail end of the rope core 2 is processed into a cone shape, and the cone rope end is connected to the traction needle by direct core insertion and fixed at Z 2 Insert the rope core 2 directly into the hollow interior at the point where the rope is inserted, and ensure that the rope core 2 is not kinked or twisted during insertion;

[0036] When the tapered end of the embedded rope core 2 is inserted into Z 1 Point and Z 2 When the points coincide, the traction needle is passed through the rope strand and the tapered rope end is brought out, and the rope core 2 is pulled to make the tail end of the rope core retreat into the hollow rope body, thereby forming an eye ring 3. Similarly, the eye ring 3 at the other end of the rope core 2 can be made as needed.

[0037] 3) Rope skin preparation: braid the strands of rope skin 1 according to the required materials and parameters, and install the rope skin yarn tube on the high-speed braiding machine for standby use;

[0038] 4) Tail end protection braiding: First, braid the strands of the rope skin 1 for a certain length, and then introduce the rope core 2 with the eyelet 3 into the rope strands of the rope skin 1 from the bottom of the high-speed braiding machine. The rope skin 1 starts to be braided at the bottom of the intersection of the eyelet 3, that is, Z 1 With Z 2 The overlap of the rope skin; the density of the rope skin braiding is precisely controlled by the equipment, so that the eye ring 3 and the outer part of the rope core 2 have the same braiding density;

[0039] If the eyelet 3 is only provided at one end of the rope core 2, the rope skin 1 can be woven to completely cover the rope core 2, and fixed at the tail end of the rope to prevent the rope skin from unraveling;

[0040] If both ends of the rope core 2 are provided with eyelets 3, when the rope skin 1 is woven to the intersection of the eyelets 3 at the other end, that is, Z 1 With Z2 When the ends of the ropes overlap, the high-speed braiding machine is paused, the eyelet 3 at the end is passed through between the rope strands of the rope skin 1, and then the high-speed braiding machine is started again, and the rope tail end protection treatment is completed after the rope strands of the rope skin 1 are braided for a distance to prevent the rope skin from spreading;

[0041] 5) Eye protection treatment: before the tapered end of the rope core 2 is inserted into the rope body of the rope core 2, an eye protection piece is installed, or a protective layer is formed on the outside of the eye 3 by conventional manual winding of a thin rope.

[0042] As a preferred method, the fixing method of the end of the rope skin 1 to prevent the rope skin from unraveling can be a method of wrapping with tape or thermoplasticizing with a thermoplastic tube.

[0043] As a preferred embodiment, the braiding density of the rope sheath 1 in step 4) is set in the range of 3-6 times the braiding diameter.

[0044] As a preferred method, in step 2), the tapered end of the rope core 2 is fixed to the tapered tip by wrapping with tape.

[0045] As a preferred embodiment, several braided ropes in the rope core 2 are individually woven into a ring structure with the same diameter, and are combined together to form an eyelet 3.

[0046] As a preferred embodiment, the plurality of braided ropes of the rope core 2 are placed side by side and fixed by a die or by winding with thin ropes.

[0047] Several specific embodiments are given below to illustrate the implementation effects of the present invention. In the actual weaving process, the steps may be slightly different from those in the technical solution, but the principles are the same.

[0048] Embodiment 1:

[0049] A method for preparing a multi-layer braided rope with tail end protection is achieved through the following steps. In this embodiment, an eyelet is formed at one end of the braided rope.

[0050] 1) Rope core preparation:

[0051] (a) Material selection: ultra-high molecular weight polyethylene fiber with a specification of 1600D;

[0052] (b) Stranding: 23 ultra-high molecular weight polyethylene fibers are combined into one strand and twisted during the paralleling process;

[0053] (c) Braiding: Use a 320 braiding machine to braid 6 strands of S-twist and 6 strands of Z-twist into a 9 mm braided rope.

[0054] 2) Eye ring preparation:

[0055] (a) Rope end taper treatment: Mark the first pair of strands at the end of each braided rope at a braiding loop, and then mark every other knot, marking a total of 3 pairs of strands; pull out and cut off all the marked 3 pairs of strands, and wrap them tightly with tape to remove the rope ends, forming a tapered rope end;

[0056] (b) Measurement and marking: Measure (3*fid) mm from the end of the rope and mark it as Z 1 , from Z 1 Measure 314mm (equivalent to the inner diameter of the eye ring is 10cm) and mark it as Z 2 ;

[0057] (c) Eye ring core: Connect the tail end of the tapered rope to the traction needle, which is located from Z 2 Insert the hollow rope until it meets Z 1 The points coincide, the traction needle passes through the rope strands and out of the rope body, and the tail end of the rope is removed;

[0058] (d) Complete the eyelet: completely remove the tape at the tapered tail end, tighten the rope strands, and make the tail end return to the hollow rope body of the rope. Slightly adjust it to form the eyelet. If there are multiple braided ropes in the rope core, make an eyelet of the same diameter for each braided rope according to the above steps, and all the eyelets are combined to form the rope eyelet.

[0059] (3) Rope skin preparation:

[0060] (a) Material selection: ultra-high molecular weight polyethylene fiber with a specification of 1600D;

[0061] (b) Plying: Two ultra-high molecular weight polyethylene fibers are combined into one strand and twisted during the plying process;

[0062] (c) Pre-weaving: Pre-weave the twisted and plied rope skin onto a 130-48 high-speed braiding machine and set aside.

[0063] (4) Tail end protection braiding: Click the start button of the 130-48 high-speed braiding machine, and after the rope skin is braided for 10 cm, click the stop button to pause the operation of the equipment; feed the rope core with braided eyelets from the bottom of the 130-48 high-speed braiding machine, and pass the eyelet part through the middle of the rope strands of the rope skin so that the intersection of the eyelet and the braiding point of the rope skin are flush; set the braiding density to 3 times the diameter and braid until the rope core is completely covered with rope skin; wrap the tape around the rope skin at the head end and the rope skin at the tail end and cut the rope skin to complete the tail end protection processing process.

[0064] Example 2

[0065] A method for preparing a multi-layer braided rope with tail end protection is achieved through the following steps. In this embodiment, eyelets are braided at both ends of the rope.

[0066] (1) Rope core preparation:

[0067] (a) Material selection: ultra-high molecular weight polyethylene fiber with a specification of 1600D;

[0068] (b) Stranding: 18 ultra-high molecular weight polyethylene fibers are combined into one strand and twisted during the paralleling process;

[0069] (c) Braiding: Use a 320 braiding machine to braid 6 strands of S-twist and 6 strands of Z-twist into an 8 mm rope.

[0070] (2) Rope core eyelet preparation:

[0071] (a) Cone treatment of the rope end: Mark the first pair of rope strands at a braided loop at the rope end, and then mark every other knot, marking a total of 3 pairs of rope strands; pull out and cut off all the marked 3 pairs of rope strands, wrap them tightly with tape to remove the rope ends, and form a tapered rope end;

[0072] (b) Measurement and marking: Measure (3*fid) mm from the end of the rope and mark it as Z 1 , from Z 1 Measure 220mm (equivalent to the inner diameter of the eye ring is 7cm) and mark it as Z 2 ;

[0073] (c) Eye ring core: Connect the tail end of the tapered rope to the traction needle, which is located from Z 2 Insert the hollow rope until it meets Z 1 The points coincide, the traction needle passes through the rope strands and out of the rope body, and the tail end of the rope is removed;

[0074] (d) Complete the eyelet at one end: completely remove the tape at the tapered tail end, tighten the rope strands with force, make the tail end return to the hollow rope body of the rope, and slightly adjust it to form an eyelet; if there are multiple braided ropes in the rope core, make an eyelet of the same diameter for each braided rope according to the above steps, and all the eyelets are combined to form the rope eyelet;

[0075] (e) Complete the eyelets at both ends: Repeat steps (a)-(d) to complete the eyelet at the other end.

[0076] (3) Rope skin preparation:

[0077] (a) Material selection: polyester fiber with a specification of 1000D;

[0078] (b) Plying: Two polyester fibers are combined into one strand and twisted during the plying process;

[0079] (c) Pre-weaving: Pre-weave the twisted and plied rope skin onto a 130-32 high-speed braiding machine and set aside.

[0080] (4) Tail end protection braiding: Click the start button of the 130-32 high-speed braiding machine, and after the rope skin is braided for 10 cm, click the stop button to pause the operation of the equipment; feed the rope core with the eyelet braided from the bottom of the 130-48 high-speed braiding machine, and pass the eyelet part through the middle of the rope skin strands, so that the intersection of the eyelet and the rope skin braiding point are flush; set the braiding density to 6 times the diameter, and braid until the rope core is completely covered with rope skin; wrap the tape around the rope skin at the head end and the rope skin at the tail end, and then cut the rope skin to complete the braiding process; remove the tape at the end of the rope skin, and use a thermoplastic tube to thermoplasticize the rope skin and fix the rope strands to prevent them from falling apart.

[0081] Example 3

[0082] A method for preparing a multi-layer braided rope with tail end protection is achieved through the following steps. In this embodiment, an eyelet is formed at one end of the braided rope.

[0083] (1) Rope core preparation:

[0084] (a) Material selection: Aramid fiber with a specification of 1500D;

[0085] (b) Stranding: 25 ultra-high molecular weight polyethylene fibers are combined into one strand and twisted during the paralleling process;

[0086] (c) Braiding: Use a 320 braiding machine to braid 6 strands of S-twist and 6 strands of Z-twist into an 8 mm rope.

[0087] (2) Rope core eyelet preparation:

[0088] (a) Cone treatment of the rope end: Mark the first pair of rope strands at a braided loop at the rope end, and then mark every other knot, marking a total of 3 pairs of rope strands; pull out and cut off all the marked 3 pairs of rope strands, wrap them tightly with tape to remove the rope ends, and form a tapered rope end;

[0089] (b) Measurement and marking: Measure (3*fid) mm from the end of the rope and mark it as Z 1 , from Z 1 Measure 220mm (equivalent to the inner diameter of the eye ring is 7cm) and mark it as Z 2 ;

[0090] (c) Eye ring core: Connect the tail end of the tapered rope to the traction needle, which is located from Z 2 Insert the hollow rope until it meets Z 1 The points coincide, the traction needle passes through the rope strands and out of the rope body, and the tail end of the rope is removed;

[0091] (d) Complete the eyelet: completely remove the tape at the tapered end, pull the rope strands tight, and push the end back into the hollow rope body. Slightly adjust it to form the eyelet.

[0092] (3) Rope skin preparation:

[0093] (a) Material selection: Aramid fiber with a specification of 1500D;

[0094] (b) Plying: Two aramid fibers are combined into one strand and twisted during the plying process;

[0095] (c) Pre-weaving: Pre-weave the twisted and plied rope skin onto a 130-48 high-speed braiding machine and set aside.

[0096] (4) Integrated braiding: Click the start button of the 130-48 high-speed braiding machine, and after the rope skin is braided for 10 cm, click the stop button to pause the operation of the equipment; feed the rope core with braided eyelets from the bottom of the 130-48 high-speed braiding machine, and pass the eyelets through the middle of the rope skin strands so that the intersection of the eyelets is flush with the rope skin braiding point; set the braiding density to 4.5 times the diameter, and braid until the rope core is completely covered with rope skin; wrap tape around the rope skin at the head end and the rope skin at the tail end, then cut the rope skin to complete the tail end protection treatment process.

[0097] The performance of the three multi-layer ropes treated by the method of the present invention was tested. After 12,000 turns of friction, the remaining strength of the rope was 80% of the original rope, while the remaining strength of the ordinary rope after the same treatment was 15% of the original rope. The overall wear resistance of the rope was improved by 50-80%, and the strength at the eyelet of the rope was improved by 10%.

[0098] For three specific embodiments, a comparison table of various parameters of ropes made by the present method and conventional methods is given to prove the significance of the technical effect of the present method. It is better to have a comparison summary and the proportion of the improvement in parameters, which is more convincing, greatly improving the performance of the rope, extending the service life of the rope, and expanding the application range of the rope.

[0099] Of course, the above description is not a limitation of the present invention, and the present invention is not limited to the above examples. Changes, modifications, additions or substitutions made by technicians in this technical field within the essential scope of the present invention should also fall within the protection scope of the present invention.

Claims

1. A method for preparing a multi-layer braided rope with tail end protection, comprising a rope skin (1), a rope core (2) and an eyelet (3), wherein the rope core (2) is arranged to be composed of a plurality of braided ropes arranged in parallel, and the eyelet (3) is arranged to be a combination of annular structures of the same diameter formed by inserting the ends of each braided rope into the hollow position inside the rope body, the rope skin (1) is arranged outside the rope core (2), and the starting point of its braiding is arranged at the intersection of the eyelet (3) on the rope core (2), characterized in that: This is accomplished by the following steps: 1) Rope core preparation: braiding a rope core (2) according to required materials and parameters, preparing a single or multiple braided ropes according to a normal braiding procedure, and placing multiple ropes in parallel to form a rope core (2); 2) Processing the tail end of the rope core: a plurality of braided ropes in the rope core (2) are individually braided into a ring structure with the same diameter, and are combined together to form an eye ring (3). First, the length L1 that needs to be braided and buried at the tail end of the rope core (2) is calculated, and the length L1 is measured from the very end of the rope core (2) and marked as point Z1 on the surface of the rope core (2); the inner diameter circumference length L2 of the eye ring (3) is measured from point Z1, and the length L2 is measured from point Z1 toward the rope body and marked as point Z2 on the surface of the rope core (2); The tail end of the rope core (2) is processed into a tapered shape, and the tapered rope end is connected to the traction needle by direct insertion, and is directly inserted into the hollow interior of the rope core (2) at point Z2, and during the insertion, it is ensured that the rope core (2) is not kinked or twisted; When the tapered end of the embedded rope core (2) is inserted to the point Z1 and coincides with the point Z2, the traction needle is passed through the rope strands and the tapered rope end is brought out, and the rope core (2) is pulled so that the tail end of the rope core is retracted into the hollow rope body, thereby forming an eye ring (3). Similarly, the eye ring (3) at the other end of the rope core (2) can be made as required. 3) Rope skin preparation: braid the strands of rope skin (1) according to the required materials and parameters, and install the rope skin yarn tube on the high-speed braiding machine for use; 4) Tail end protection braiding: first, the strands of the rope skin (1) are braided for a certain length, and then the rope core (2) with the braided eyelet (3) is introduced from the bottom of the high-speed braiding machine into the rope strands of the rope skin (1). The rope skin (1) starts to be braided at the bottom of the intersection of the eyelet (3), that is, the overlap of point Z1 and point Z2. The braiding density of the rope skin is precisely controlled by the equipment, so that the outer part of the eyelet (3) and the rope core (2) have the same braiding density; If the rope core (2) is provided with an eyelet (3) at only one end, the rope skin (1) may be woven to completely cover the rope core (2), and the rope skin may be fixed at the tail end of the rope to prevent the rope skin from unraveling; If eyelets (3) are provided at both ends of the rope core (2), when the rope skin (1) is woven to the intersection of the eyelet (3) at the other end, that is, the overlap of point Z1 and point Z2, the high-speed braiding machine is paused, the eyelet (3) at this end is passed through between the rope strands of the rope skin (1), and then the high-speed braiding machine is started again, and the rope skin (1) strands are woven for a certain distance to complete the rope tail end protection treatment to prevent the rope skin from unraveling; 5) Eye protection treatment: before the tapered end of the rope core (2) is inserted into the rope body of the rope core (2), an eye protection piece is installed, or a protective layer is formed on the outside of the eye ring (3) by conventional manual winding of a thin rope.

2. The method for preparing a multi-layer braided rope with tail end protection according to claim 1, characterized in that: The fixing method for preventing the end of the rope skin (1) from unraveling is to wrap it with tape or to thermoplasticize it with a thermoplastic tube.

3. The method for preparing a multi-layer braided rope with tail end protection according to claim 1, characterized in that: The braiding density of the rope skin (1) in step 4) is set in the range of 3-6 times the braiding diameter.

4. The method for preparing a multi-layer braided rope with tail end protection according to claim 1, characterized in that: In step 2), the tapered end of the rope core (2) is wrapped with adhesive tape to fix the tapered tip.

5. A method for preparing a multi-layer braided rope with tail end protection according to claim 1 or 4, characterized in that: The plurality of braided ropes of the rope core (2) are placed side by side and fixed by means of a die or by winding with thin ropes.

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