Cable joint insulation injection molding colloid dividing structure

Abstract

The utility model discloses a cable joint insulation injection molding colloid dividing structure, and mainly relates to the technical field of cable maintenance. Comprising an upper injection molding part and a lower injection molding part which are symmetrically arranged up and down, an upper glue injection channel is formed in the upper injection molding part in the extending direction of the upper injection molding part in a penetrating mode, and a lower glue injection channel is formed in the lower injection molding part in the extending direction of the lower injection molding part in a penetrating mode. The inner end of the upper glue injection channel and the inner end of the lower glue injection channel are both communicated with the inner end of the feeding pipe. The double-end injection molding device has the beneficial effects that the double-end injection molding device is matched with a screw conveyor, and is used for shunting molten materials and providing a passage structure for double-end injection molding.

Description

Technical Field

[0001] The utility model relates to the technical field of cable maintenance, in particular to a cable joint insulation injection molding colloid structure. Background Art

[0002] For cable damage repair and joint operations, the damaged part needs to be repaired or the joint part needs to be connected, and these operations need to be completed on site.

[0003] The existing method is to use strip-shaped semi-conductive tape and polyethylene insulating tape to wrap and fill the places where the cable needs to be connected or repaired on site, and then wrap a layer of polytetrafluoroethylene high-temperature tape and copper tape on the outside, and then wrap it with a mixing belt or heat it with a torch to melt it into a whole. This method is easy to mix air, dust and other impurities during operation, and the quality of the obtained repair layer is not good. In addition, the material of the winding tape is different from the insulation of the cable body. After melting, the fusion strength and intimacy of the critical surface of the cable body insulation are not good. The most important thing is that the thermal elongation of this repair method does not meet the standard, which reduces the temperature tolerance of the cable operation and shortens its life. For the above reasons, the traditional method has buried hidden dangers for the subsequent operation of the cable.

[0004] The new method uses low-density heat-crosslinked polyethylene material, which is the same material as the cable body, after the conductor is welded and trimmed and the inner semi-conductive layer is restored. The material is melted by a plastic extruder and extruded into a specially designed molding mold, so that the heat-crosslinked polyethylene melt fills the area between the outer semi-conductive layer of the cable conductor and the inner cavity of the mold to form the mold. After the mold is cooled, the mold is removed. However, under this method, due to the low melt index, high viscosity and poor fluidity of the low-density cross-linked polyethylene material, the driving force on the cable conductor during the injection molding process is large, which can easily cause the insulation layer to be eccentric, especially for conductors with small cross-sectional areas, which bend under the extrusion of the molten material, exacerbating the problem of insulation eccentricity. Utility Model Content

[0005] The utility model aims to provide a cable joint insulation injection molding colloid separation structure, which cooperates with a screw conveyor to split the molten material and provide a double-head injection molding passage structure.

[0006] In order to achieve the above purpose, the utility model is implemented through the following technical solutions:

[0007] A cable joint insulation injection molding colloid structure

[0008] It includes a glue-dispensing body that is overall "C"-shaped, a feed pipe is provided in the middle of the glue-dispensing body, and the glue-dispensing body includes an upper injection molding part and a lower injection molding part that are symmetrically arranged up and down. An upper glue injection channel is provided in the upper injection molding part along its extension direction, and a lower glue injection channel is provided in the lower injection molding part along its extension direction. The inner ends of the upper glue injection channel and the lower glue injection channel are both connected to the inner end of the feed pipe.

[0009] The feed pipe is a threaded pipe.

[0010] The upper glue injection channel and the lower glue injection channel are channel structures that are symmetrically arranged up and down.

[0011] The end of the upper injection molding part is provided with an upper injection port connected to the upper injection channel, and the upper injection port is internally threaded with a spiral connector. The end of the lower injection molding part is provided with a lower injection port connected to the lower injection channel, and the lower injection port is also equipped with a spiral connector. The end of the spiral connector exposed to the outside is provided with a glue injection nozzle.

[0012] The spiral connector includes a straight tube portion, a threaded portion, and a glue injection nozzle which are integrally formed from one end to the other end; the threaded portion is threadedly connected to the upper glue injection port, and the inner end of the upper glue injection port is provided with a step groove that matches the straight tube portion.

[0013] A chamfered structure is arranged on the outer end surface of the glue injection nozzle.

[0014] Compared with the prior art, the beneficial effects of the present invention are:

[0015] Through the colloid structure, a diversion channel is provided for the molten material of the screw extruder, which can be injected by diversion above and below the mold, and double-nozzle injection is realized, and the molten material is diverted before injection, which offsets the problem that the molten material of the single-hole injection is gathered together with high viscosity and poor fluidity, and the thrust of diversion to the surrounding is large. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] Figure 1 It is an overall schematic diagram of the utility model.

[0017] Figure 2 It is a schematic diagram of the disassembly state of the utility model.

[0018] Figure 3 It is a schematic diagram of the internal structure of the utility model.

[0019] Numbers shown in the accompanying drawings:

[0020] 1. Feed pipe; 2. Upper injection molding part; 3. Lower injection molding part; 4. Upper injection channel; 5. Lower injection channel; 6. Spiral connector; 7. Straight pipe part; 8. Threaded part; 9. Glue injection nozzle; 10. Upper injection port; 11. Step groove; 12. Lower injection port; 13. Chamfer structure. DETAILED DESCRIPTION

[0021] The present invention is further described below in conjunction with specific embodiments. It should be understood that these embodiments are only used to illustrate the present invention and are not used to limit the scope of the present invention. In addition, it should be understood that after reading the content taught by the present invention, those skilled in the art can make various changes or modifications to the present invention, and these equivalent forms also fall within the scope defined by the present application.

[0022] The instruments, reagents, materials, etc. involved in the following embodiments, unless otherwise specified, are all conventional instruments, reagents, materials, etc. in the prior art and can be obtained through regular commercial channels. The experimental methods, detection methods, etc. involved in the following embodiments, unless otherwise specified, are all conventional experimental methods, detection methods, etc. in the prior art.

[0023] Embodiment 1: A cable joint insulation injection molding colloid structure

[0024] This structure is mainly used to cooperate with the discharge port of the screw extruder to pour the molten material extruded by the screw extruder into the cavity of the mold.

[0025] The invention comprises a C-shaped glue dispensing body, wherein a feed pipe 1 is arranged in the middle of the height direction of the glue dispensing body, and the feed pipe 1 is a threaded pipe, and the feed pipe 1 is threadedly matched and fixed with the discharge port of the screw extruder to realize the installation of the glue dispensing structure and the screw extruder. The outer end of the feed pipe 1 is provided with a bell mouth for receiving and guiding the molten material.

[0026] The glue dispensing body includes an upper injection molding part 2 and a lower injection molding part 3 which are symmetrically arranged in the upper and lower directions. An upper injection molding channel 4 is provided in the upper injection molding part 2 along its extension direction, and a lower injection molding channel 5 is provided in the lower injection molding part 3 along its extension direction. The inner ends of the upper injection molding channel 4 and the lower injection molding channel 5 are both connected to the inner ends of the feed pipe 1, and the molten material is fed to the two channels through the feed pipe 1.

[0027] The upper injection port 10 is provided at the end of the upper injection molding part 2, and the upper injection port 10 is internally threaded with a spiral connector 6, and the spiral connector 6 includes a straight tube part 7, a threaded part 8, and a glue injection nozzle 9 which are integrally formed from one end to the other end; a glue injection cavity is penetrated in the spiral connector 6 along the center of its length direction, and the threaded part 8 is threadedly connected to the upper injection port 10, so that the extended length of the glue injection nozzle 9 can be adjusted. The inner end of the upper injection port 10 is provided with a step groove 11 that matches the straight tube part 7, so as to better dock with the spiral connector 6 and feed the material. The glue injection nozzle 9 is located outside the glue dispensing body, and a chamfered structure 13 is provided on the outer end surface of the glue injection nozzle 9. The glue injection nozzle 9 is used to achieve docking and glue injection with the injection hole of the mold.

[0028] A lower injection port 12 is provided at the end of the lower injection molding part 3 . The lower injection port 12 corresponds to the structure of the upper injection port 10 and is also equipped with a spiral connector 6 to achieve docking and injection of the molten material with the injection hole of the mold.

[0029] The connection between the upper glue injection channel 4 and the lower glue injection channel 5 and the feed pipe 1 forms a herringbone flow splitting structure, which is beneficial to the propulsion of the fluid.

[0030] Through the colloid structure, the molten material from the screw extruder is injected into the mold, and the molten material is diverted by using two channels, one above and one below, so that it can be diverted and injected above and below the mold, and double-nozzle injection can be achieved. The molten material is diverted before injection, offsetting the problem that the molten material of single-hole injection gathers together with high viscosity and poor fluidity, and the thrust of diversion to the surrounding is large.

[0031] Based on the symmetrical arrangement of the upper glue injection channel 4 and the lower glue injection channel 5, the molten material diverted from the feed pipe 1 has diversion channels of equal length after diversion, and the double-nozzle glue injection is more uniform.

[0032] In order to facilitate installation and production, the glue dispensing body and the feed pipe 1 adopt an integrally formed structure, and the glue dispensing body and the feed pipe 1 are cut into two equally symmetrical glue dispensing halves from the upper glue injection channel 4, the lower glue injection channel 5 and the center of the feed pipe 1, and the two glue dispensing halves are fixed by screws.

Claims

1. A cable joint insulation injection molding colloid structure, characterized in that: It includes a glue-dispensing body that is overall "C"-shaped, a feed pipe is provided in the middle of the glue-dispensing body, and the glue-dispensing body includes an upper injection molding part and a lower injection molding part that are symmetrically arranged up and down. An upper glue injection channel is provided in the upper injection molding part along its extension direction, and a lower glue injection channel is provided in the lower injection molding part along its extension direction. The inner ends of the upper glue injection channel and the lower glue injection channel are both connected to the inner end of the feed pipe.

2. The cable joint insulation injection molding colloid structure according to claim 1, characterized in that: The feed pipe is a threaded pipe.

3. The cable joint insulation injection molding colloid structure according to claim 1, characterized in that: The upper glue injection channel and the lower glue injection channel are channel structures that are symmetrically arranged up and down.

4. The cable joint insulation injection molding colloid structure according to claim 1, characterized in that: The end of the upper injection molding part is provided with an upper injection port connected to the upper injection channel, and the upper injection port is internally threaded with a spiral connector. The end of the lower injection molding part is provided with a lower injection port connected to the lower injection channel, and the lower injection port is also equipped with a spiral connector. The end of the spiral connector exposed to the outside is provided with a glue injection nozzle.

5. The cable joint insulation injection molding colloid structure according to claim 4, characterized in that: The spiral connector includes a straight tube portion, a threaded portion, and a glue injection nozzle which are integrally formed from one end to the other end; the threaded portion is threadedly connected to the upper glue injection port, and the inner end of the upper glue injection port is provided with a step groove that matches the straight tube portion.

6. A cable joint insulation injection molding colloid structure according to claim 5, characterized in that: A chamfered structure is arranged on the outer end surface of the glue injection nozzle.

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