A cable extrusion method without adjusting die head

Abstract

The present application relates to the field of cable processing, and specifically to a method for extrusion of a cable head without adjustment, wherein the polyethylene material flows into the machine body through the machine diameter, and then flows through the material flow channel formed between the diverter cone and the machine body, and the polyethylene material flows out through multiple channel outlets of the material flow channel, and the multiple channel outlets are evenly distributed on the circumference of the diverter cone, and the depth at the entrance of the channel outlet is deeper than the depth at the outlet, and there is a gap between the mold core and the mold sleeve of the mold, and the polyethylene material flows out from both ends of the arc-shaped channel outlet to the mold core mold sleeve flow channel of the mold, and extrusion is achieved through the mold core mold sleeve flow channel, wherein the flow direction of the material flow channel on the diverter cone is set opposite to the extrusion direction of the mold. The present application greatly improves work efficiency, the mold is quick to install, the extrusion does not require debugging, reduces the waste of raw materials, and can effectively ensure the quality of optical cable products. The backflow method is used for diversion, which is opposite to the extrusion direction. This mode provides extrusion pressure to ensure the stability of the glue output.

Description

Technical Field

[0001] The present application relates to the field of cable processing, and specifically to a cable extrusion method that does not require an adjustment die. Background Art

[0002] At present, the domestic polyethylene extruder head is large in size and heavy in weight. The head composition structure is complex, which is not conducive to unloading and disassembly. The mold installation is cumbersome. The extrusion concentricity is controlled by the four adjusting screws around the head to control the position of the mold sleeve to ensure the extrusion concentricity. The working principle of the traditional head is: the material enters the head through the machine runner and flows into the extrusion mold through the diverter cone flow channel. The core rod is installed inside the diverter cone through threaded matching, the core is installed on the core rod through threads, and the mold sleeve is installed outside the core through the mold sleeve seat and the mold sleeve cover. By adjusting the core rod to control the distance between the core and the mold sleeve, the extrusion pressure is formed to achieve the stability of the glue output. The uniformity of the extruded glue is controlled by adjusting the mold sleeve seat through the concentricity adjustment screw to achieve the control of concentricity. Its main disadvantages are: large size, overall weight, complex structure, high assembly difficulty, and high technical requirements for concentricity adjustment.

[0003] Relevant patents in the prior art include a utility model patent with application number CN201921388675.2 and titled "A polyethylene composite pipe production extruder with adjustable head", and its technical solution is as follows: The utility model discloses an extruder for the production of polyethylene composite pipes with an adjustable head, comprising a base, fixed rods are fixedly connected to the left and right sides of the upper surface of the base, a main extrusion box is fixedly installed on the upper end of the fixed rod, a main heating plate is fixedly installed on the outer surface of the main extrusion box, and a shaft sleeve is fixedly connected to the inner wall on the right side of the main extrusion box, an extrusion rod is rotatably connected to the other side of the shaft sleeve, the other end of the extrusion rod passes through the left side of the main extrusion box and is fixedly connected to an extrusion motor, a spiral blade is fixedly connected to the outer surface of the extrusion rod, an auxiliary extrusion box is fixedly connected to the right side of the main extrusion box, the auxiliary extrusion box and the main extrusion box are connected to each other, and an auxiliary heating plate is fixedly installed on the outer surface of the auxiliary extrusion box, and a connecting cylinder is fixedly connected to the right side of the auxiliary extrusion box.

[0004] The above patent has improved the head of the extruder, but in order to ensure that the head is an adjustable structure, its internal structure is complicated. When debugging the extrusion, there are still strict requirements on the extrusion debugging skills. The time for converting multiple varieties into small batches is long, resulting in waste of production capacity and greatly reducing work efficiency. The strict adjustment skills require a huge waste of raw materials. Summary of the invention

[0005] In order to overcome the above problems existing in the prior art, the present application proposes a method for extruding cables using an adjustment-free die head.

[0006] In order to achieve the above technical effects, the technical solution of this application is as follows:

[0007] A method for extruding a cable without an adjustment head, wherein a polyethylene material flows into a machine body through a machine diameter, and then flows through a material flow channel formed between a diverter cone and the machine body, and then flows out through a plurality of channel outlets of the material flow channel, wherein the plurality of channel outlets are evenly distributed on the circumference of the diverter cone, and the depth of the channel outlet at the entrance is deeper than the depth at the outlet, and there is a gap between a mold core and a mold sleeve of a mold, and the polyethylene material flows out from both ends of the arc-shaped channel outlet to the mold core and mold sleeve flow channel of the mold, and is extruded through the mold core and mold sleeve flow channel, wherein the flow direction of the material flow channel on the diverter cone is set opposite to the extrusion direction of the mold.

[0008] The adjustment-free machine head for cables for implementing the method comprises a machine diameter and a machine body which are connected to each other, a diverter cone is arranged inside the machine body, a circular hole is opened in the center of the machine diameter, a material flow channel is formed between the circular hole and the diverter cone in the machine body, a mold is arranged inside the diverter cone, the mold comprises a mold core and a mold sleeve which are fastened to each other and realize self-centering, the mold sleeve is pressed in the diverter cone by a mold sleeve pressure cover, and the flow direction of the material flow channel is arranged opposite to the extrusion direction of the mold.

[0009] Furthermore, a plurality of concave arc-shaped channel outlets are obliquely arranged in the gap on the outer surface of the diverter cone, and the channel outlets are connected with the material channel to form a complete flow channel.

[0010] Furthermore, the machine diameter and the machine body are connected by threads.

[0011] Furthermore, a heating rod is provided at the bottom of the machine body.

[0012] Furthermore, the diverter cone is threadedly connected to the interior of the machine body.

[0013] Furthermore, a gap between the mold core and the mold sleeve flow channel formed between the mold core and the mold sleeve is 3 mm ± 0.05 mm.

[0014] Furthermore, the mold core and the mold sleeve are fixed to each other via concentric connecting rods, and the outlet of the mold core and the outlet of the mold sleeve are distributed in concentric circles.

[0015] Furthermore, the overall length of the non-adjustable head is 80mm-100mm, the length of the mold core is 50mm-55mm, and the overall mold installation size is 65mm-72mm.

[0016] Furthermore, the diverter cone is made of H13 mold steel, with an overall length of 70±5mm, a backflow design, a recessed structure for the flow channel, and an injection flow channel designed to be half of the circumference. At the end of the diversion, it is divided into two, divided into 4 flow channels, symmetrically distributed, and the end of the flow channel is divided into two, and finally divided into 8 flow channels. The depth from the flow channel inlet to the outlet decreases from deep to deep, with an inlet depth of 8mm and an outlet depth of 0.6mm. The 8 logistics channels finally converge at the outlet.

[0017] The advantages of this application are:

[0018] 1. This application greatly improves work efficiency, the mold is quick to install, extrusion does not require debugging, reduces the waste of raw materials, and can effectively ensure the quality of optical cable products. The backflow method is used for diversion, which is opposite to the extrusion direction. This mode provides extrusion pressure to ensure the stability of glue output.

[0019] 2. The die head of the present application can be configured on an extruder with a larger screw diameter, and has the function of extruding multi-color strips; when in use, polyethylene can be extruded without adjusting the mold, and the polyethylene layer has a relatively uniform single-sided thickness, and the eccentricity is easy to control; the mold core and the mold sleeve are connected by concentric tie rods, which can easily suppress leakage.

[0020] 3. The adjustment-free die head of the present application is suitable for the extrusion process of various cable products. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] Figure 1 This is a schematic diagram of the structure of the adjustment-free machine head.

[0022] Figure 2 Schematic diagram of the splitter cone structure.

[0023] Figure 3 Schematic diagram of the mold structure.

[0024] Figure 4 This is a three-dimensional diagram of the splitter cone.

[0025] In the attached figure:

[0026] 1-machine diameter, 2-machine body, 3-diverter cone, 4-circular hole, 5-material flow channel, 6-mold core, 7-mold sleeve, 8-mold sleeve pressure cover, 9-concave structure, 10-heating rod, 11-connecting pull rod, 12-mold core and mold sleeve flow channel, 13-channel outlet. DETAILED DESCRIPTION

[0027] In order to make the purpose, technical solution and advantages of the embodiments of the present application clearer, the technical solution in the embodiments of the present application will be clearly and completely described below in conjunction with the drawings in the embodiments of the present application. Obviously, the described embodiments are part of the embodiments of the present application, rather than all the embodiments. The components of the embodiments of the present application described and shown in the drawings here can be arranged and designed in various different configurations.

[0028] Therefore, the following detailed description of the embodiments of the present application provided in the accompanying drawings is not intended to limit the scope of the present application for which protection is sought, but merely represents selected embodiments of the present application. Based on the embodiments in the present application, all other embodiments obtained by ordinary technicians in the field without creative work are within the scope of protection of the present application.

[0029] It should be noted that similar reference numerals and letters denote similar items in the following drawings, and therefore, once an item is defined in one drawing, further definition and explanation thereof is not required in subsequent drawings.

[0030] In the description of the present application, it should be noted that the terms "upper", "vertical", "inner", "outer", etc. indicate the orientation or position relationship based on the orientation or position relationship shown in the drawings, or the orientation or position relationship in which the product of the application is usually placed when in use, or the orientation or position relationship commonly understood by those skilled in the art. They are only for the convenience of describing the present application and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation on the present application. In addition, the terms "first", "second", etc. are only used to distinguish the description, and cannot be understood as indicating or implying relative importance.

[0031] In the description of this application, it should also be noted that, unless otherwise clearly specified and limited, the terms "set", "install", and "connect" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection, or it can be an indirect connection through an intermediate medium, or it can be the internal communication of two components. For ordinary technicians in this field, the specific meanings of the above terms in this application can be understood according to specific circumstances.

[0032] like Figure 1 As shown, a method for extruding a cable without an adjustment head, polyethylene material flows into the machine body 2 through the machine diameter 1, and then passes through the material flow channel 5 formed between the diverter cone 3 and the machine body 2, and the polyethylene material flows out through multiple channel outlets 13 of the material flow channel 5, and the multiple channel outlets 13 are evenly distributed on the circumference of the diverter cone 3, and the depth of the inlet of the channel outlet 13 is deeper than the depth at the outlet, and there is a gap between the core 6 and the mold sleeve 7 of the mold, and the polyethylene material flows out from both ends of the arc-shaped channel outlet 13 to the core-mold sleeve flow channel 12 of the mold, and extrusion is achieved through the core-mold sleeve flow channel 12, wherein the flow direction of the material flow channel 5 on the diverter cone 3 is set opposite to the extrusion direction of the mold.

[0033] The adjustment-free machine head for cables for implementing the present method comprises a machine diameter 1 and a machine body 2 which are connected to each other, a diverter cone 3 is arranged inside the machine body 2, a circular hole 4 is opened in the center of the machine diameter 1, a material flow channel 5 is formed between the circular hole 4 and the diverter cone 3 in the machine body 2, a mold is arranged in the diverter cone 3, the mold comprises a mold core 6 and a mold sleeve 7 which are fastened to each other and realize self-centering, the mold sleeve 7 is pressed in the diverter cone 3 by a mold sleeve pressure cover 8, and the flow direction of the material flow channel 5 is arranged opposite to the extrusion direction of the mold.

[0034] like Figure 2 As shown, a plurality of concave structures 9 are obliquely arranged in the gap on the outer surface of the splitter cone 3, and the plurality of concave structures 9 form a complete material channel.

[0035] The machine diameter 1 and the machine body 2 are connected by threads. A heating rod 10 is arranged at the bottom of the machine body 2. The flow dividing cone 3 is connected to the inside of the machine body 2 by threads.

[0036] like Figure 3 As shown, the gap of the core-mold sleeve flow channel 12 formed between the mold core 6 and the mold sleeve 7 is 3 mm±0.05 mm.

[0037] The mold core 6 and the mold sleeve 7 are fixed to each other via concentric connecting rods 11 .

[0038] The overall length of the non-adjustable head is 80mm-100mm, the length of the mold core 6 is 50mm-55mm, and the overall mold installation size is 65mm-72mm.

[0039] The adjustment-free handpiece of the present application reduces the structural size, and the volume of the adjustment-free handpiece is one-third of the volume of the traditional handpiece, achieving a transformation from light weight to small volume, and the handpiece is easy to replace.

[0040] The assembly difficulty is reduced and the assembly time is shortened. The adjustment-free die optimizes the matching mode of the traditional die splitter cone 3 and the mold core 6 rod, and designs them into a whole; cancels the mold sleeve 7 seat; introduces the concept of self-centering of the mold core 6 and the mold sleeve 7, and designs the mold core 6 and the mold sleeve 7 into an integrated mode; cancels the traditional mold core 6 assembly mode, cancels the mold core 6 thread assembly on the mold core 6 rod; cancels the mold sleeve 7 seat, cancels the mold sleeve 7 being installed in the mold sleeve 7; the adjustment-free die realizes an integrated mold of the mold sleeve 7 and mold core 6 integrated mode, and the mold is directly installed in the splitter cone 3 using the mold pressure cover. This achieves rapid assembly, eliminates multiple steps, and reduces the difficulty of assembly.

[0041] Change the diversion direction. The traditional head diversion method is to divert along the direction of the mold core 6. The non-adjustable head diversion method is to divert in a reverse flow manner, which is opposite to the extrusion direction. This mode provides extrusion pressure to ensure the stability of the glue output.

[0042] The concentricity of extrusion by the adjustment-free head does not need to be adjusted. The concentricity of extrusion is ensured by the cooperation between the head and the integrated mold. The extrusion mold of the adjustment-free head adopts an integrated mold. The mold is a core 6 and a mold sleeve 7 fixed as a whole by a connecting rod. The concentricity of the core 6 and the mold sleeve 7 is ensured by machining precision, so that the outlet of the core 6 and the outlet of the mold sleeve 7 are distributed in concentric circles, thereby achieving adjustment-free.

[0043] When the mold is assembled on the adjustment-free head, the mold is assembled into the diverter cone 3 by the mold cover, and the gap between the mold core 6 and the mold sleeve 7 is designed. Generally, a gap of about 3 mm is given for extruded materials. The gap can be adjusted according to the extrusion characteristics of the material, and a tolerance range is given to ensure the processing accuracy of the integrated mold.

[0044] This machine head is suitable for various extruders, especially for large extruders, where its advantages are more obvious.

[0045] The working principle of the adjustment-free die of the present application is as follows: the material enters the die through the flow channel of the machine diameter 1, and flows into the extrusion mold through the flow channel of the diverter cone 3. The extrusion mold is composed of a mold core 6, a mold sleeve 7 and a connecting rod. There is a 3mm gap between the mold core 6 and the mold sleeve 7. The material is injected into the gap of the mold after being diverted by the diverter cone 3, and extrusion is achieved through the mold flow gap.

[0046] The traditional head diversion method is to divert along the direction of the mold core 6, and the non-adjustable head diversion method is to divert in a reverse flow manner, which is opposite to the extrusion direction. This mode provides extrusion pressure to ensure the stability of the glue output.

[0047] The overall size of the present application is reduced. The length of the traditional machine head is 350mm, while the non-adjustable machine head can be 90mm. The length of the core 6 of the traditional machine head is 118mm, and the size of the core 6 is reduced by half. The length of the core 6 rod of the traditional machine head is 225mm. The core 6 of the traditional machine head is threadedly installed on the core 6 rod, and the installation size is 330mm. The non-adjustable machine head cancels the core 6 rod and adopts the reverse diversion method, which shortens the overall size of the machine head; the mold of the non-adjustable machine head is directly installed inside the diversion cone 3, the length of the core 6 can be 52mm, and the overall mold installation size can be 69mm.

[0048] The diverter cone is made of H13 mold steel, which has anti-softening ability at higher temperatures and small deformation during heat treatment. The overall length of the diverter cone is designed to be 70±5mm, with a backflow design and a recessed flow channel. An injection flow channel is designed, which is distributed as half of the circumference. At the end of this diverter, it is divided into two, divided into 4 flow channels, symmetrically distributed, and the end of the flow channel is divided into two, and finally divided into 8 flow channels. The depth from the flow channel inlet to the outlet decreases from deep to deep, with an inlet depth of 8mm and an outlet depth of 0.6mm. The 8 logistics channels finally converge at the outlet. This design not only ensures the stability of circular extrusion, but also provides reliable guarantee for the uniformity of glue output.

Claims

1. A method for extruding a cable without adjusting the die head, characterized in that: The method comprises the following steps: a polyethylene material flows into a machine body (2) through a machine diameter (1), and then flows through a material flow channel (5) formed between a diverter cone (3) and the machine body (2), and the polyethylene material flows out through a plurality of channel outlets (13) of the material flow channel (5), wherein the plurality of channel outlets (13) are evenly distributed on the circumference of the diverter cone (3), and the depth of the inlet of the channel outlet (13) is deeper than the depth of the outlet, and there is a gap between the mold core (6) and the mold sleeve (7) of the mold, and the polyethylene material flows out from both ends of the arc-shaped channel outlet (13) to the mold core mold sleeve flow channel (12) of the mold, and extrusion is achieved through the mold core mold sleeve flow channel (12), wherein the flow direction of the material flow channel (5) on the diverter cone (3) is arranged opposite to the extrusion direction of the mold; The cable non-adjustable machine head for realizing the method comprises a machine diameter (1) and a machine body (2) which are connected to each other, a diverter cone (3) is arranged inside the machine body (2), a circular hole (4) is opened in the center of the machine diameter (1), a material flow channel (5) is formed between the circular hole (4) and the diverter cone (3) in the machine body (2), a mold is arranged inside the diverter cone (3), the mold comprises a mold core (6) and a mold sleeve (7) which are fastened to each other and realize self-centering, the mold sleeve (7) is pressed into the diverter cone (3) by a mold sleeve pressure cover (8), and the flow direction of the material flow channel (5) is arranged to be opposite to the extrusion direction of the mold; The outer surface gap of the splitter cone (3) is obliquely provided with a plurality of concave arc-shaped channel outlets (13), and the channel outlets (13) are connected to the material channel to form a complete flow channel; The gap between the core-mold sleeve flow channel (12) formed between the mold core (6) and the mold sleeve (7) is 3 mm ± 0.05 mm; The overall length of the non-adjustable die head is 80 mm-100 mm, the length of the mold core (6) is 50 mm-55 mm, and the overall mold installation size is 65 mm-72 mm; The diverter cone (3) is made of H13 die steel, with an overall length of 70±5 mm. It adopts a backflow design, and the flow channel adopts an indented structure. An injection flow channel is designed, which is distributed as half of the circumference. At the end of this diverter, it is divided into two, divided into 4 flow channels, symmetrically distributed, and the end of the flow channel is divided into two, and finally divided into 8 flow channels. The depth of the flow channel inlet to the outlet decreases from deep to deep, the inlet depth is 8 mm, and the outlet depth is 0.6 mm. The 8 logistics channels finally converge at the outlet.

2. A cable extrusion method without adjustment die head according to claim 1, characterized in that: The machine diameter (1) and the machine body (2) are connected via threads.

3. The cable extrusion method according to claim 1, characterized in that: A heating rod (10) is provided at the bottom of the machine body (2).

4. The cable extrusion method according to claim 1, characterized in that: The splitter cone (3) is threadedly connected to the interior of the machine body (2).

5. The cable extrusion method according to claim 1, characterized in that: The mold core (6) and the mold sleeve (7) are fixed to each other via concentric connecting rods (11), and the outlet of the mold core (6) and the outlet of the mold sleeve (7) are distributed in concentric circles.

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