CN111554458A

CN111554458A - Waterproof cable and manufacturing method thereof

Info

Publication number: CN111554458A
Application number: CN202010415526.1A
Authority: CN
Inventors: 李小平
Original assignee: Individual
Current assignee: Individual
Priority date: 2020-05-16
Filing date: 2020-05-16
Publication date: 2020-08-18

Abstract

The invention provides a manufacturing method of a waterproof cable, which comprises the following steps: forming a wire core, wherein the wire core comprises a plurality of inner cores, a gap is arranged between the inner cores, and a certain amount of thermal fuse is arranged in the gap; preheating the wire core to preliminarily melt the thermal fuse; and heating the thermal fuse again while extruding the outer surface layer covering the wire core, so that the thermal fuse is fully melted to fill the gap. The invention is easier to form and control.

Description

Waterproof cable and manufacturing method thereof

Technical Field

The invention relates to the technical field of cable processing, in particular to a waterproof cable and a manufacturing method thereof.

Background

The cable has many purposes, is mainly used for controlling installation, connecting equipment, transmitting power and other multiple functions, and is a common and indispensable object in daily life. The wire and cable are generally manufactured by three processes of drawing, stranding and coating.

During the forming of the cable, it is necessary to achieve longitudinal waterproofing (i.e. to prevent water from penetrating along the length of the cable). In the prior art, longitudinal waterproofing is realized by coating hot melt adhesive on a wire core and adhering the wire core and an outer surface layer, for example, CN105679466A discloses "a process for producing an outer sheath of a submarine cable armored steel wire". Such forming mode degree of difficulty is big, is difficult for holding the mobility of hot melt adhesive, and the hot melt adhesive mobility is great and less all coats unevenly easily to lead to water-proof effects not good, in addition, the thickness of coating hot melt adhesive is limited, can't fully fill the space, and the hot melt adhesive easily drips in addition, will seriously influence the operation environment.

Disclosure of Invention

In view of the above, in order to solve one of the technical problems in the related art to a certain extent, it is necessary to provide a method for manufacturing a waterproof cable and a waterproof cable, which are easier to form and control.

The invention provides a manufacturing method of a waterproof cable, which comprises the following steps:

forming a wire core, wherein the wire core comprises a plurality of inner cores, a gap is arranged between the inner cores, and a certain amount of thermal fuse is arranged in the gap;

preheating the wire core to preliminarily melt the thermal fuse;

and heating the thermal fuse again while extruding the outer surface layer covering the wire core, so that the thermal fuse is fully melted to fill the gap.

Further, the sinle silk includes the inlayer core and locates in proper order the outer at least one layer of outer core of inlayer core, the inlayer core includes at least one the inner core, outer core includes many parallels the inner core, the inlayer core with between the outer core and adjacent two have between the outer core the space.

Furthermore, the inner layer core comprises three inner cores, and the three inner cores are sequentially attached to enable the gap to be formed inside the inner layer core.

Further, the wire core is a single-layer core, the single-layer core comprises at least three parallel inner cores, and the gap is formed inside the single-layer core.

Further, the inner core and the thermal fuse are twisted.

Further, the inner core and the thermal fuse are twisted by a stranding machine.

Further, the inner core is a metal wire.

Further, the inner core is a copper wire.

Further, the extrusion speed is 100m-300 m/min, the extrusion temperature is greater than or equal to 130 ℃, and the thermal fuse is a full-melting thermal fuse.

The invention also provides a waterproof cable manufactured by the manufacturing method.

According to the scheme, the wire core is formed in advance, then the wire core is preheated to enable the hot melt wire to be initially melted, and finally the hot melt wire is heated again while the outer surface layer covering the wire core is extruded out, so that the hot melt wire is fully melted to fill the gap, the hot melt adhesive does not need to be coated in advance when the wire core is formed, the wire core is more convenient to prepare, the hot melt wire is melted while the outer surface layer is extruded out, and the outer surface layer can prevent the hot melt adhesive formed by the hot melt wire from overflowing out of the outside, so that the hot melt adhesive is prevented from dripping.

Drawings

FIG. 1 is a flow chart of the present invention.

Fig. 2 is a schematic structural diagram of a wire core according to a first embodiment of the present invention.

Fig. 3 is a schematic structural diagram of a wire core according to a second embodiment of the present invention.

Fig. 4 is an enlarged view of fig. 3 at a.

Fig. 5 is a schematic structural diagram of a wire core according to a third embodiment of the present invention.

Fig. 6 is a schematic structural diagram of a wire core according to a fourth embodiment of the present invention.

Fig. 7 is a schematic structural view of a core of a second embodiment of the present invention after extrusion of the outer layer.

The following detailed description will further illustrate the invention in conjunction with the above-described figures.

Detailed Description

The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments of the present invention without any inventive step, are within the scope of the present invention. It is to be understood that the drawings are provided solely for the purposes of reference and illustration and are not intended as a definition of the limits of the invention. The connection relationships shown in the drawings are for clarity of description only and do not limit the manner of connection.

Referring to fig. 1, a method for manufacturing a waterproof cable according to an embodiment of the present invention includes the following steps.

S100: a wire core 100 is formed.

In this step, as shown in fig. 2 to 6, the wire core includes a plurality of inner cores 10, the inner cores 10 have voids 12 therebetween, and a certain amount of thermal fuse 30 is disposed in the voids 12. The amount of thermal fuse 30 may be selected depending on the size of the void 12.

It is understood that the melting temperature of the inner core 10 may be much greater than the melting temperature of the thermal fuse 30. In the present embodiment, the inner core 10 is preferably a metal wire, and more preferably, the inner core 10 is a copper wire, and it should be understood that the specific material of the inner core 10 may be selected according to the use environment and/or the requirement of the cable.

Moreover, the materials of the inner cores 10 may be the same or different. The diameters of the inner cores 10 may be the same or different. According to the requirements of the service environment of the prepared cable, the inner cores 10 with proper diameters, the inner cores 10 made of proper materials and the inner cores 10 in proper quantity are selected.

In addition, the size of the voids 12 formed by the inner cores 10 with different diameters may be different, and the appropriate diameter and number of the thermal fuses 30 are selected according to the size of the voids 12 and the diameter of the thermal fuses 30, so that the voids 12 can be filled after the thermal fuses 30 are melted, and particularly, optionally, each void 12 may be filled with 10 to 15D of the thermal fuses 30.

In a first embodiment, as shown in fig. 1, the wire core 100 may be a single-layer core, and the single-layer core includes three or more inner cores 10 (three inner cores 10 in fig. 1) in a proper amount, the three or more inner cores 10 are arranged in parallel to form a layer of a ring shape, the gap 12 is formed between the three or more inner cores 10, and a certain amount of thermal fuse 30 is disposed in the gap 12.

In a second embodiment, as shown in fig. 3 to 6, the wire core 100 may be a multilayer core, specifically including an inner core 101 and at least one outer core 102 sequentially disposed outside the inner core 101, for example, the core may be a single outer core 102 (as shown in fig. 3 and 5), two outer cores 102 sequentially disposed (fig. 6), or more outer cores 102, which are not listed here.

Different diameter cables can be made by selecting different numbers of outer cores 102 and/or different diameter inner cores.

The inner layer core 101 comprises at least one inner core 10, specifically, one inner core 10 and two inner cores 10 which are parallel to each other; or three inner cores 10 may be juxtaposed and sequentially laminated so that the voids 12 are formed inside the inner core 101.

The outer layer core 102 includes a plurality of juxtaposed inner cores 10, and the included inner cores 10 of the outer layer core 102 are juxtaposed and surround the outside of the inner layer core 101 or surround the inner layer outer layer core 102. Adjacent two inner cores 10 of each outer core 102 can be tightly attached. The gap 12 is provided between the inner core 101 and the outer core 102 and between two adjacent outer cores 102, and a certain amount of the thermal fuse 30 is provided in the gap 12.

Preferably, the inner core 10 is twisted with the thermal fuse 30. More specifically, the inner core 10 may be twisted on the outer side of the inner core 10 by a twisting machine, so that the inner core 10 and the thermal fuse 30 are twisted and fixed to form a wire core 100, which is convenient for heating the wire core 100. In this way, the thermal fuse 30 can be stably received in the space 12 between the inner cores 10.

S200: the core 100 is preheated to preliminarily melt the thermal fuse 30.

The preliminary melting temperature is preferably lower than the melting temperature of the thermal fuse 30. The primary melting of the thermal fuse 30 can make the thermal fuse 30 preliminarily bond with the inner core 10, especially when twisting the inner core 10 and the thermal fuse 30, the surface of the thermal fuse 30 is easy to generate 'hair', the 'hair' can extend from the gap 12 to the outside, and the 'hair' can be melted through the primary melting, so that the phenomenon that the appearance of the cable is influenced due to the uneven surface when the outer surface layer 40 is extruded subsequently is avoided.

S300: the thermal fuse 30 is heated again while the outer skin 40 covering the wire core 100 is extruded, so that the thermal fuse 30 is sufficiently melted to fill the void 12.

As shown in fig. 7, taking the embodiment shown in fig. 3 as an example, when the extruder generates a certain temperature to enable the extruder to extrude the outer layer 40, the outer layer material with a suitable extrusion temperature and the thermal fuse 30 with a suitable thermal melting temperature are selected, and the thermal fuse 30 can be reheated while extruding the outer layer 40, so that the thermal fuse 30 is sufficiently melted to form the thermal fuse 31, and after the thermal fuse 30 is sufficiently melted, the thermal fuse 31 will fill the gap 12, thereby realizing the sealing of the gap 12, realizing the longitudinal waterproof effect of the cable, and the waterproof grade can reach IP 68.

In addition, according to the mode, the manufacturing cost of the waterproof cable can be reduced, the production efficiency is correspondingly improved due to the fact that the mode of coating the hot melt adhesive is abandoned, the hot melt adhesive is filled in the gaps 12 formed by the inner core 10 after being melted, the gaps 12 are filled, the tensile capacity of the cable is further improved, and the service life of the cable core is prolonged.

In the present embodiment, the extrusion speed is preferably 100m to 300 m/min, the extrusion temperature is preferably 130 ℃ or higher, and the thermal fuse 30 is a full-melt thermal fuse 30.

The embodiment of the invention also provides the waterproof cable manufactured by adopting the embodiment.

Throughout the description and claims of this application, the words "comprise/comprises" and the words "have/includes" and variations of these are used to specify the presence of stated features, values, steps or components but do not preclude the presence or addition of one or more other features, values, steps, components or groups thereof.

Some features of the invention, which are, for clarity, described in the context of separate embodiments, may also be provided in combination in a single embodiment. Conversely, certain features of the invention, which are, for brevity, described in the context of a single embodiment, may also be provided separately or in any suitable combination in different embodiments.

The above description is only for the purpose of illustrating the preferred embodiments of the present invention and is not to be construed as limiting the invention, and any modifications, equivalents and improvements made within the spirit and principle of the present invention are intended to be included within the scope of the present invention.

Claims

1. A method of making a waterproof cable, the method comprising the steps of:

preheating the wire core to preliminarily melt the thermal fuse;

2. The method for manufacturing the waterproof cable according to claim 1, wherein the cable core includes an inner core and at least one outer core sequentially disposed outside the inner core, the inner core includes at least one inner core, the outer core includes a plurality of inner cores arranged in parallel, and the gaps are formed between the inner core and the outer core and between two adjacent outer cores.

3. The method for manufacturing the waterproof cable according to claim 2, wherein the inner layer core comprises three inner cores, and the three inner cores are sequentially attached to form the gap inside the inner layer core.

4. The method for manufacturing the waterproof cable according to claim 1, wherein the wire core is a single-layer core, the single-layer core comprises at least three parallel inner cores, and the gap is formed inside the single-layer core.

5. The method of manufacturing a waterproof cable according to any one of claims 1 to 4, wherein said inner core and said thermal fuse are twisted.

6. The method of making a waterproof cable according to claim 5, wherein said inner core and said thermal fuse are twisted by a stranding machine.

7. The method of making a water resistant cable according to any one of claims 1-5 wherein the inner core is a wire.

8. The method of making a waterproof cable according to claim 7, wherein said inner core is a copper wire.

9. The method for manufacturing a waterproof cable according to any one of claims 1 to 4, wherein the extrusion speed is 100m to 300 m/min, the extrusion temperature is 130 ℃ or higher, and the thermal fuse is a full-melt thermal fuse.

10. A waterproof cable manufactured by the manufacturing method according to any one of claims 1 to 9.