Non-woven fabric longitudinal wrapping device for cable production

Abstract

The invention discloses a non-woven fabric longitudinal wrapping device for cable production. The non-woven fabric longitudinal wrapping device comprises a wrapping mechanism used for longitudinally wrapping a cable core with non-woven fabric; the injection molding mechanism is used for carrying out injection molding coating on the cable core coated with the non-woven fabric so as to prevent the non-woven fabric from being dispersed; according to the non-woven fabric longitudinal wrapping device for cable production, the non-woven fabric is guided by the trumpet-shaped guide cavity by utilizing the soft special shape of the non-woven fabric, so that the non-woven fabric is wrapped on the cable core in the longitudinal direction, and in order to avoid wrinkles of the non-woven fabric in the wrapping process as far as possible, the non-woven fabric is tightly attached to the cable core from multiple directions by using high-speed airflow, so that the non-woven fabric is prevented from being damaged. Meanwhile, a non-woven fabric discharging mechanism with adjustable resistance is matched, so that the non-woven fabric in the conveying process is always in a tensioned state, wrinkles can be avoided, the cable core coated with the non-woven fabric can be immediately subjected to injection molding wrapping, the non-woven fabric can be effectively prevented from being scattered, longitudinal wrapping of the non-woven fabric on the cable core is achieved through the extremely simple structure, and the production efficiency is improved. The device has the advantages of low failure rate and easiness in maintenance.

Description

Technical Field

[0001] The invention relates to the technical field of cable manufacturing, in particular to a non-woven fabric longitudinal wrapping device for cable production. Background Art

[0002] Cable armor generally adopts the method of double steel belt gap wrapping. The steel belt is hard and has a large rebound tendency during wrapping, which aggravates the external tension of the polyethylene sheath. Therefore, in the processing of polyethylene sheath, it is necessary to select suitable raw materials, reasonably match molds and cool in sections. Generally, a non-woven fabric buffer layer is added to the polyethylene sheath to protect the polyethylene sheath. Longitudinal wrapping is a way of wrapping tape, that is, when the semi-finished cable is extruded, a layer of wrapping tape is dragged along the direction of the semi-finished product to achieve the effect of isolating the outer sheath. At present, there are special processing devices for longitudinal wrapping of metal strips such as aluminum-plastic composite tape, steel tape, copper tape and aluminum tape in the cable manufacturing process, and they have been widely used. However, these special processing devices for longitudinal wrapping are not suitable for longitudinal wrapping of non-metallic soft strips such as non-woven fabrics. Therefore, non-metallic soft strips such as non-woven fabrics are basically wrapped in a wrapping method. The wrapping method requires manual work by the staff, and the wrapping inevitably leads to poor surface flatness of the cable. Therefore, the PE polyethylene sheath is uneven and prone to cracking. This method not only consumes a lot of manpower, but also increases the risk of quality defects during processing. Summary of the invention

[0003] The technical problem to be solved by the present invention is to overcome the existing defects and provide a non-woven fabric longitudinal wrapping device for cable production, which can effectively solve the problems in the background technology.

[0004] To achieve the above-mentioned purpose, the present invention provides the following technical solutions: a non-woven fabric longitudinal wrapping device for cable production, comprising a wrapping mechanism for longitudinally wrapping the non-woven fabric on the cable core; a feeding mechanism capable of adjusting the resistance so that the non-woven fabric is in a tensioned state during transportation; and an injection molding mechanism for injection molding the cable core wrapped with the non-woven fabric to prevent the non-woven fabric from spreading; wherein, under the action of external traction force, the cable core and the non-woven fabric tied thereto enter the guide cavity at the front end of the wrapping mechanism by the wrapping mechanism, the guide cavity is in the shape of a trumpet with a large mouth and a small bottom, and the injection molding mechanism is arranged at the rear end of the wrapping mechanism adjacent to the wrapping mechanism.

[0005] As a preferred technical solution of the present invention, lower blowing holes and upper blowing holes are symmetrically arranged on both sides of the guide cavity, and the two groups of lower blowing holes and upper blowing holes are connected by a shunt pipe, and the shunt pipe is connected to an external blowing device through a connecting pipe.

[0006] As a preferred technical solution of the present invention, the airflow of the lower blowing holes is vertically upward, and the airflow of the upper blowing holes is inclined upward.

[0007] As a preferred technical solution of the present invention, an exhaust hole is provided on the top of the guide cavity.

[0008] As a preferred technical solution of the present invention, the exhaust hole is connected to an external air extraction device through a pipeline.

[0009] As a preferred technical solution of the present invention, the discharge mechanism includes a bracket, on which a load-bearing shaft is rotatably mounted, one end of the load-bearing shaft is provided with a friction disk, and the other end is hinged with a tensioning block, the inside of the load-bearing shaft is hollow and a tensioning screw is provided through a thread, and a resistance adjustment mechanism is provided at the position of the bracket corresponding to the friction disk, wherein the resistance adjustment mechanism includes a friction block, and the friction block is movably mounted on the bracket through an adjusting stud and a guide rod.

[0010] As a preferred technical solution of the present invention, a magnet is provided on the tension block, and a magnet is also provided at a corresponding position on the load-bearing shaft. When the tension block is in a contracted state, the two magnets attract each other and are closest to each other.

[0011] As a preferred technical solution of the present invention, a support ring is provided in the middle of the load-bearing shaft.

[0012] Compared with the prior art, the beneficial effects of the present invention are as follows: the non-woven fabric longitudinal wrapping device for cable production utilizes the soft shape of the non-woven fabric and adopts a trumpet-shaped guide cavity to guide the non-woven fabric so that it is longitudinally wrapped on the cable core. In order to avoid wrinkles on the non-woven fabric during the wrapping process as much as possible, high-speed airflow is used to make the non-woven fabric close to the cable core from multiple directions. At the same time, the non-woven fabric discharging mechanism with adjustable resistance is used to make the non-woven fabric in transportation always in a tensioned state, which is more conducive to avoiding wrinkles. The cable core coated with the non-woven fabric is immediately injection-molded and wrapped, which can effectively prevent the non-woven fabric from spreading. The device uses a very simple structure to achieve longitudinal wrapping of the cable core with non-woven fabric, and has the advantages of low failure rate and easy maintenance. BRIEF DESCRIPTION OF THE DRAWINGS

[0013] Figure 1 It is a schematic diagram of the structure of the present invention;

[0014] Figure 2 It is a schematic diagram of the coating mechanism of the present invention;

[0015] Figure 3 It is a schematic diagram of the air duct structure in the covering mechanism of the present invention;

[0016] Figure 4 It is a schematic diagram of the material discharge mechanism of the present invention;

[0017] Figure 5 It is a schematic diagram of the three-dimensional structure of the material discharge mechanism of the present invention;

[0018] Figure 6 It is a schematic diagram of the three-dimensional structure of the tail of the discharge mechanism of the present invention.

[0019] In the figure: 1 covering mechanism, 11 guide cavity, 12 shunt pipe, 13 connecting pipe, 14 lower air blowing hole, 15 upper air blowing hole, 16 exhaust hole, 2 unloading mechanism, 21 bracket, 22 load-bearing shaft, 23 tensioning block, 24 tensioning screw, 25 friction disk, 26 resistance adjustment mechanism, 27 friction block, 28 adjustment stud, 29 guide rod, 21, 3 injection molding mechanism, 4 cable core, 5 non-woven fabric. DETAILED DESCRIPTION

[0020] The technical solutions in the embodiments of the present invention are described clearly and completely below. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of them. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0021] See also Figure 1-6 The present invention provides a technical solution: a non-woven fabric longitudinal wrapping device for cable production, comprising the following components:

[0022] A covering mechanism 1 for longitudinally covering the nonwoven fabric 5 on the cable core 4;

[0023] The cable core 4 and the non-woven fabric tied thereto enter the guide cavity 11 at the front end of the covering mechanism 1 under the action of external traction. The guide cavity 11 is in the shape of a trumpet with a large mouth and a small bottom, which guides the non-woven fabric 5. During the movement of the cable core 4, the trumpet-shaped guide cavity 11 gradually narrows, driving the non-woven fabric 5 to wrap around the cable core 4 in the longitudinal direction. The lower blowing holes 14 and the upper blowing holes 15 are symmetrically arranged on both sides of the guide cavity 11. The airflow of the lower blowing holes 14 is vertically upward, and the airflow of the upper blowing holes 15 is inclined upward. The two groups of lower blowing holes 14 and upper blowing holes 15 are connected. The guide cavity 11 is connected to the non-woven fabric 5 through the shunt pipe 12, which is connected to the external blowing device through the connecting pipe 13. The blowing device generates a high-speed airflow, which is blown to the non-woven fabric 5 through the lower blowing hole 14 and the upper blowing hole 15 to make it close to the cable core 4, thereby avoiding wrinkles on the non-woven fabric 5 during the movement in the guide cavity 11, and improving the quality of the longitudinal package. The top of the guide cavity 11 is provided with an exhaust hole 16, which is connected to the external exhaust device through a pipeline to comb the airflow direction in the guide cavity 11, so that the airflow has a fixed route, and avoids the situation of airflow turbulence, which affects the longitudinal package effect;

[0024] A material discharge mechanism 2 capable of adjusting resistance so that the nonwoven fabric 5 is in a tensioned state during the conveying process;

[0025] Among them, the material discharge mechanism 2 includes a bracket 21, on which a load-bearing shaft 22 is rotatably installed, and the load-bearing shaft 22 is in a cantilever state so as to install a material tray of the non-woven fabric 5. During the longitudinal wrapping process, the non-woven fabric 5 is tied to the cable core 4, and the cable core 4 and the non-woven fabric 5 move when the external traction force is applied. The material tray is continuously and passively rotated in the process, and the non-woven fabric 5 can be tensioned and wrapped more smoothly on the cable core 4 by adjusting its rotational resistance. A friction disk 25 is arranged at one end of the load-bearing shaft 22, and a tensioning block 23 is hinged at the other end. A magnet is arranged on the tensioning block 23, and a magnet is also arranged at a corresponding position on the load-bearing shaft 22. When the tensioning block 23 is in a contracted state, the two magnets attract each other and are closest to each other, so that the tensioning block 23 is in a minimum diameter state when the material tray is not placed, so as to avoid affecting the installation of the material tray. The load-bearing shaft 22 is hollow inside and is provided with a tensioning screw 24 through a thread. After the material tray is installed, the tensioning block can be pushed out by screwing in the tensioning screw 24. 23, so that it is pressed against the axial hole of the material tray, and the material tray and the load-bearing shaft 22 are fixed as one body, so as to adjust the rotation resistance thereof, wherein the tensioning block 23 and the tensioning screw 24 can be replaced by an expandable airbag and a corresponding inflation channel, and the airbag is inflated by inflation and then stuck in the axial hole of the material tray, and the material tray and the load-bearing shaft 22 can also be fixed as one body, and a support ring is arranged in the middle of the load-bearing shaft 22, and the outer diameter of the support ring is slightly smaller than the inner diameter of the axial hole of the material tray, so as to support the material tray, and avoid that the inclination angle of the tensioning block 23 is too large after the material tray is clamped, which seriously affects the feeding direction, and a resistance adjustment mechanism 26 is arranged at the position corresponding to the friction disk 25 on the bracket 21, wherein the resistance adjustment mechanism 26 includes a friction block 27, and the friction block 27 is movably mounted on the bracket 21 by adjusting the stud 28 and cooperating with the guide rod 29, and the pressure of the friction block 27 on the friction disk 25 is adjusted by adjusting the stud 28, so as to achieve the function of adjusting the rotation resistance of the material tray;

[0026] The cable core 4 coated with the non-woven fabric 5 is subjected to injection molding by an injection molding mechanism 3 to prevent the non-woven fabric 5 from spreading out. The injection molding mechanism 3 is arranged at the rear end close to the coating mechanism 1. The injection molding mechanism 3 includes a heating module, a pressurizing module and an injection molding channel. The heating module melts the plastic particles into a molten state. The pressurizing module squeezes the liquid plastic through the injection molding channel around the longitudinally wrapped cable core 4 to wrap it. The wrapped plastic layer is quickly cooled and solidified after the cable core 4 leaves the injection molding mechanism 3 to prevent the non-woven fabric 5 from spreading out.

[0027] During use: the trumpet-shaped guide cavity 11 guides the non-woven fabric 5 whose end is tied to the cable core 4, so that it is wrapped on the cable core 4 in the longitudinal direction. In order to avoid wrinkles on the non-woven fabric 5 during the wrapping process as much as possible, a high-speed airflow is used through the lower air blowing hole 14 and the upper air blowing hole 15 to make the non-woven fabric 5 close to the cable core 4 from multiple directions. At the same time, the discharge mechanism 2 of the non-woven fabric 5 with adjustable resistance is used to make the non-woven fabric 5 in conveyance always in a tensioned state, which is more conducive to avoiding wrinkles. After longitudinal wrapping, the cable core 4 covered with the non-woven fabric 5 is immediately injection-molded and wrapped by the injection molding mechanism 3, which can effectively avoid the non-woven fabric 5 from spreading out after longitudinal wrapping.

[0028] Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that various changes, modifications, substitutions and variations may be made to the embodiments without departing from the principles and spirit of the present invention, and that the scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. A non-woven fabric longitudinal wrapping device for cable production, characterized in that: It comprises a covering mechanism (1) for longitudinally covering a non-woven fabric (5) on a cable core (4); A material discharge mechanism (2) capable of adjusting resistance so that the nonwoven fabric (5) is in a tensioned state during the conveying process; An injection molding mechanism (3) for performing injection molding on the cable core (4) coated with the non-woven fabric (5) to prevent the non-woven fabric (5) from spreading; The cable core (4) and the non-woven fabric tied thereto are wrapped around the covering mechanism (1) under the action of an external traction force and enter into a guide cavity (11) at the front end of the covering mechanism (1); the guide cavity (11) is in the shape of a trumpet with a large mouth and a small bottom; and the injection molding mechanism (3) is arranged at the rear end of the covering mechanism (1) in close proximity.

2. A non-woven fabric longitudinal wrapping device for cable production according to claim 1, characterized in that: The guide cavity (11) is symmetrically provided with lower air blowing holes (14) and upper air blowing holes (15) on both sides. The two groups of lower air blowing holes (14) and upper air blowing holes (15) are connected through a shunt pipe (12). The shunt pipe (12) is connected to an external air blowing device through a connecting pipe (13).

3. A non-woven fabric longitudinal wrapping device for cable production according to claim 2, characterized in that: The airflow of the lower air blowing hole (14) is directed vertically upward, and the airflow of the upper air blowing hole (15) is directed obliquely upward.

4. A non-woven fabric longitudinal wrapping device for cable production according to claim 2, characterized in that: An exhaust hole (16) is provided at the top of the guide cavity (11).

5. A non-woven fabric longitudinal wrapping device for cable production according to claim 4, characterized in that: The exhaust hole (16) is connected to an external air extraction device via a pipeline.

6. The non-woven fabric longitudinal wrapping device for cable production according to claim 1, characterized in that: The discharge mechanism (2) comprises a bracket (21), a bearing shaft (22) is rotatably mounted on the bracket (21), a friction disc (25) is arranged at one end of the bearing shaft (22), and a tension block (23) is hingedly connected at the other end, the bearing shaft (22) is hollow inside and a tension screw (24) is arranged through a thread, and a resistance adjustment mechanism (26) is arranged at a position on the bracket (21) corresponding to the friction disc (25), wherein the resistance adjustment mechanism (26) comprises a friction block (27), and the friction block (27) is movably mounted on the bracket (21) through an adjustment stud (28) and a guide rod (29).

7. A non-woven fabric longitudinal wrapping device for cable production according to claim 6, characterized in that: The tension block (23) is provided with a magnet, and a magnet is also provided at a corresponding position on the load-bearing shaft (22). When the tension block (23) is in a contracted state, the two magnets attract each other and are closest to each other.

8. The non-woven fabric longitudinal wrapping device for cable production according to claim 6, characterized in that: A supporting ring is arranged in the middle of the load-bearing shaft (22).

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