Method of making synthetic fiber rope with eyelets

Abstract

The application relates to the field of eye rings, in particular to a preparation method of a synthetic fiber rope with an eye ring, which comprises the following steps: preparing a rope body by using synthetic fibers; pre-stretching the rope body under 20% breaking force, then immersing and coating a setting glue, and obtaining a setting rope body; selecting an aluminum sleeve with an inner diameter larger than the diameter of the rope body by 2 mm; threading the rope body through the aluminum sleeve to form an eye ring, and sealing the bottom of the aluminum sleeve with putty at a place where the eye ring needs to be pressed; filling and pouring a gap-filling glue between the aluminum sleeve and the rope body to obtain a semi-finished product; curing the semi-finished product, and the curing temperature is lower than the melting temperature of the synthetic fibers, to obtain a cured rope body; and pressing the cured rope body, so that the synthetic fiber rope with the eye ring is obtained. The eye ring obtained by the application has high strength, the process is simple, the process of manual weaving is reduced, and the batch reliability is high.

Description

Technical Field

[0001] This invention relates to the field of eye rings, specifically a method for preparing a synthetic fiber cord with an eye ring. Background Technology

[0002] The eyelet is an important component of synthetic fiber ropes. The breaking strength of a synthetic fiber rope largely depends on the strength of the eyelet. To ensure the strength of the eyelet, the eyelets of synthetic fiber ropes are traditionally made using a braiding method. When making the eyelet, each strand of the twisted rope needs to be untangled, and the ends of the untangled strands are wrapped to prevent loosening of the twist before the eyelet is braided.

[0003] To ensure the twist and strength of each strand and to prevent the tail from unraveling, the tail of each strand of rope core needs to be tightly wrapped with tape. Then, a special inserting tool is used for insertion. The insertion needs to be of a certain length, generally 10 to 20 times the rope diameter. During the insertion process, the strands need to be inserted sequentially according to the original twist position and pitch. The entire process is done by hand, which takes a long time for a single rope. The quality of the insertion depends on the worker's skill level, and the reliability between batches cannot be guaranteed.

[0004] We also tried to use the steel wire rope pressing process to make eye rings. This process uses aluminum sleeves for fixing and hydraulic pressing. However, since synthetic fibers are flexible materials, the synthetic fiber ropes become thinner during the stretching process. The thinner ropes are easy to slip out of the aluminum sleeves during the stretching process, which does not meet the requirements. Summary of the Invention

[0005] This invention provides a method for preparing synthetic fiber ropes with eye loops. The resulting eye loops have high strength, the process is simple, the hand weaving process is reduced, and batch reliability is high, thus solving the problems existing in the background art. This invention provides the following technical solution:

[0006] A method for preparing a synthetic fiber rope with an eye loop includes the following steps:

[0007] The rope body is made using synthetic fibers;

[0008] The rope body is pre-stretched under 20% breaking force, and then impregnated with setting adhesive to achieve shaping and curing, resulting in a shaped rope body;

[0009] Select an aluminum sleeve with an inner diameter 2mm larger than the diameter of the rope body;

[0010] Pass the rope through the aluminum sleeve to form an eyelet, and seal the bottom of the aluminum sleeve with modeling clay where the eyelet needs to be pressed.

[0011] Fill the gap between the aluminum sleeve and the rope body with potting compound, allowing the potting compound to penetrate into the interior of the rope body to obtain a semi-finished product;

[0012] The semi-finished product is cured at a temperature lower than the melting temperature of the synthetic fiber, so as not to damage the structure and strength of the rope body, and the cured rope body is obtained.

[0013] By pressing the cured rope body, a synthetic fiber rope with eyelets can be obtained.

[0014] As a further aspect of the present invention, the setting adhesive uses polyurethane emulsion, which is easy to purchase and has good performance.

[0015] As a further aspect of this invention: the potting compound is a polyurethane curing compound. The cured polyurethane curing compound has a certain elasticity, ensuring that it is not easily sheared and broken during the pressing process, and its Shore hardness is between 35A and 55A. At the same time, it can ensure that the viscosity is appropriate. If the viscosity is too low, it is easy to penetrate into the pores of the rope body, which will not achieve the filling and curing effect. If the viscosity is too high, it is not easy to fill into the gap between the aluminum sleeve and the rope body, and it is also difficult to penetrate into the interior of the rope body, which will not achieve the effect of curing the part and improving its hardness.

[0016] As a further aspect of the present invention, the viscosity of the potting compound is between 5000 cps and 10000 cps, which is a suitable viscosity to meet the potting effect.

[0017] As a further aspect of the present invention: the mold used in the pressing process needs to be adapted to the rope body and the diameter after curing. Generally, a mold of a lower grade than that of the aluminum sleeve is used for pressing. For example, if the aluminum sleeve is 10mm, a 9mm customized mold is used for molding.

[0018] As a further aspect of the present invention, the pre-stretching time is 25 to 35 minutes.

[0019] As a further aspect of the present invention, the pressing process adopts a hydraulic process, which is technically mature and has a good pressing effect.

[0020] Compared with the prior art, the beneficial effects of the present invention are:

[0021] This invention inserts an aluminum sleeve into the tail of the rope body to form an eye loop. Then, a potting compound is applied to the gap between the aluminum sleeve and the rope body. The curing of the potting compound increases the rigidity of the rope body. By selecting a suitable potting compound and aluminum sleeve, the eye loop is manufactured using a pressing process. The resulting eye loop has high strength, a simple process, reduces the need for manual weaving, and has high batch reliability. Attached Figure Description

[0022] Figure 1This is a schematic diagram of an existing synthetic fiber rope with an eyelet.

[0023] Figure 2 This is a schematic diagram of the structure of the synthetic fiber rope with eye loops obtained in an embodiment of the present invention. Detailed Implementation

[0024] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0025] The specific implementation of the present invention will be described in detail below with reference to specific embodiments.

[0026] See Figure 2 A method for preparing a synthetic fiber rope with an eyelet includes the following steps:

[0027] The rope body is made using synthetic fibers;

[0028] The rope body is pre-stretched under 20% breaking force (referring to 20% of the force that breaks synthetic fibers), and then impregnated with setting adhesive to achieve setting and curing, resulting in the set rope body;

[0029] Choose an aluminum sleeve with an inner diameter 2mm larger than the diameter of the rope body. For example, if the diameter of the rope body is 8mm, choose a round aluminum sleeve with an inner diameter of 10mm for easy installation.

[0030] Pass the rope through the aluminum sleeve to form an eyelet, and seal the bottom of the aluminum sleeve with modeling clay where the eyelet needs to be pressed.

[0031] Fill the gap between the aluminum sleeve and the rope body with potting compound so that the potting compound penetrates into the interior of the rope body. After the potting compound is cured, it needs to have a certain elasticity to ensure that it is not easily sheared and broken during the pressing process. It also needs to have a suitable viscosity to obtain a semi-finished product.

[0032] The semi-finished product is cured at a temperature lower than the melting temperature of the synthetic fiber, so as not to damage the structure and strength of the rope body. For example, the curing temperature of ultra-high molecular weight polyethylene rope is 50℃~60℃ and the time is 30min~60min, so as to obtain the cured rope body.

[0033] By pressing the cured rope body, a synthetic fiber rope with eyelets can be obtained.

[0034] In one embodiment of the present invention, the setting adhesive is a polyurethane emulsion, which is easy to purchase and has good performance.

[0035] In one embodiment of the present invention, the potting compound is a polyurethane curing compound. The cured polyurethane curing compound has a certain elasticity, ensuring that it is not easily sheared and crushed during the pressing process, and its Shore hardness is between 35A and 55A. At the same time, it can ensure that the viscosity is appropriate. If the viscosity is too low, it is easy to penetrate into the pores of the rope body, which will not achieve the filling and curing effect. If the viscosity is too high, it is not easy to fill into the gap between the aluminum sleeve and the rope body, and it is also difficult to penetrate into the interior of the rope body, which will not achieve the effect of curing the part and improving the hardness.

[0036] In one embodiment of the present invention, the viscosity of the potting compound is between 5000 cps and 10000 cps, which is a suitable viscosity to meet the potting effect.

[0037] In one embodiment of the present invention, the mold used in the pressing process needs to be adapted to the rope body and the diameter after curing. Generally, a mold of a lower grade than that of the aluminum sleeve is used for pressing. For example, if the aluminum sleeve is 10mm, a 9mm customized mold is used for molding.

[0038] In one embodiment of the present invention, the pre-stretching time is 25 to 35 minutes.

[0039] In one embodiment of the present invention, the pressing process adopts a hydraulic process, which is technically mature and has a good pressing effect.

[0040] See Figures 1-2 The breaking force test was conducted on the products of the above embodiments and existing braided synthetic fiber ropes, and the products of the embodiments of the present invention meet the standards for synthetic fiber ropes. Figure 1 For existing braided synthetic fiber ropes, Figure 2 For the products of this embodiment of the invention, from Figure 1 and Figure 2 As can be seen, in order to ensure strength, existing braided synthetic fiber ropes require a certain length, while the aluminum sleeve in the embodiment of the present invention only needs to be potted and pressed, and the process is simpler than braiding. Therefore, the manufacturing process of the present invention is simpler.

[0041] It should be noted that, in this invention, unless otherwise explicitly specified and limited, the terms "fixed," "set," etc., should be interpreted broadly. For example, they can refer to welded connections, bolted connections, or integral connections; they can refer to mechanical connections or electrical connections; they can refer to direct connections or indirect connections through an intermediate medium; they can refer to the internal communication of two components or the interaction between two components, unless otherwise explicitly limited. Those skilled in the art can understand the specific meaning of the above terms in this invention according to the specific circumstances.

[0042] Furthermore, it should be understood that although this specification describes embodiments, not every embodiment contains only one independent technical solution. This narrative style is merely for clarity. Those skilled in the art should consider the specification as a whole, and the technical solutions in each embodiment can also be appropriately combined to form other embodiments that can be understood by those skilled in the art.

Claims

1. A method for preparing a synthetic fiber rope with an eyelet, characterized in that, Includes the following steps: The rope body is made using synthetic fibers; The rope body is pre-stretched under 20% breaking force, and then impregnated with setting glue to obtain the set rope body; Select an aluminum sleeve with an inner diameter 2mm larger than the diameter of the rope body; Pass the rope through the aluminum sleeve to form an eyelet, and seal the bottom of the aluminum sleeve with modeling clay where the eyelet needs to be pressed. Fill the gap between the aluminum sleeve and the rope body with potting compound to obtain a semi-finished product; The semi-finished product is cured at a temperature lower than the melting temperature of the synthetic fiber to obtain the cured rope body; By pressing the cured rope body, a synthetic fiber rope with eyelets can be obtained.

2. The method for preparing the synthetic fiber rope with an eyelet according to claim 1, characterized in that, The setting adhesive is made of polyurethane emulsion.

3. The method for preparing the synthetic fiber rope with an eyelet according to claim 1 or 2, characterized in that, The potting compound is a polyurethane curing adhesive.

4. The method for preparing the synthetic fiber rope with an eyelet according to claim 3, characterized in that, The viscosity of the potting compound is between 5000 cps and 10000 cps.

5. The method for preparing the synthetic fiber rope with an eyelet according to claim 1, characterized in that, The pressing process uses a mold that is one grade lower than that used for aluminum sleeves.

6. The method for preparing the synthetic fiber rope with an eyelet according to claim 1, characterized in that, The pre-stretching time is 25-35 minutes.

7. The method for preparing the synthetic fiber rope with an eyelet according to claim 1 or 5, characterized in that, The pressing process employs a hydraulic process.

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