Reusable extrusion die core for cable production

Abstract

The utility model discloses a reusable extrusion die core for cable production, which comprises a die core main body, a positioning ring is fixedly mounted on one side of the die core main body, a positioning groove is formed in the inner wall of the die core main body, a round hole is formed in the inner wall of the positioning groove, a positioning spring is fixedly mounted on the inner wall of the round hole, and a positioning block is fixedly mounted at one end of the positioning spring. And a ball is embedded in one side of the positioning block. According to the reusable extrusion die core for cable production, a lining is placed in the die core body, then one side of a limiting block makes contact with the surface of a ball, so that the ball extrudes a positioning block, meanwhile, a positioning spring buffers and resets the positioning block, and when the positioning block needs to be replaced subsequently and the lining is not extruded, the positioning block can be replaced, and the lining is prevented from being damaged. And the lining is separated from the mold core main body, so that the lining can be conveniently disassembled, subsequent use is facilitated, and the use efficiency of the mold core is improved.

Description

Technical Field

[0001] The utility model relates to the technical field of cable production, in particular to a reusable extrusion die core for cable production. Background Art

[0002] Cable is an electrical energy or signal transmission device composed of several or several groups of wires. Cables include power cables, control cables, compensation cables, shielded cables, high-temperature cables, computer cables, signal cables, coaxial cables, fire-resistant cables, marine cables, mining cables, aluminum alloy cables, etc. They are all composed of single or multiple wires and insulation layers, and are used to connect circuits, electrical appliances, etc.

[0003] The prior art application number is CN202310355194.6, which discloses a cable double-wire extrusion device, including a pay-off device, an extruder, a cooling trough and a take-up device. The extruder is provided with an extrusion screw and an extrusion die, and the extrusion die includes a die sleeve and a die core. Two through holes are arranged in the die sleeve, and the through hole includes a truncated cone portion and a cylindrical portion. The die core is provided with two, which are respectively arranged in the die sleeve, and a flow channel is formed between the die sleeve and the die core, and the right end of the die core is directly opposite to the cylindrical portion of the through hole; the extrusion screw is arranged in the barrel between the two through holes, and the barrel is provided with two discharge ports, which are respectively connected to the flow channels on both sides. The present invention can extrude two cables at the same time, improve production efficiency, and improve extrusion quality.

[0004] The cable double-wire extrusion device proposed in the above application is not convenient for replacing the inner lining of the mold during actual application, which affects the subsequent extrusion operation and reduces the utilization efficiency of the device. It also increases the wear of the mold, making it inconvenient to adjust it later and easily causing damage to the winding mold, thereby reducing the utilization efficiency of the mold core. Utility Model Content

[0005] The utility model aims to provide an extrusion die core which can be reused in cable production, so as to solve the problems raised in the above-mentioned background technology.

[0006] To achieve the above-mentioned purpose, the utility model provides the following technical solution: a reusable extrusion core for cable production, comprising a core body, a positioning ring fixedly installed on one side of the core body, a positioning groove is provided on the inner wall of the core body, a circular hole is provided on the inner wall of the positioning groove, a positioning spring is fixedly installed on the inner wall of the circular hole, a positioning block is fixedly installed on one end of the positioning spring, and a ball is embedded on one side of the positioning block.

[0007] The interior of the mold core body is sleeved with an inner lining, and a limit block is fixedly installed on the surface of the inner lining, and the limit block is clamped in the interior of the positioning groove.

[0008] Preferably, a clamping groove is provided on one side of the positioning ring, a hemispherical groove is provided on one side of the limiting block, and the ball is rollingly connected to the inner wall of the hemispherical groove.

[0009] Preferably, the surface of the positioning block is slidably connected to the inner wall of the circular hole, and the circular hole is adapted to the positioning block.

[0010] Preferably, a slide bar is fixedly mounted on the inner wall of the circular hole of the inner wall of the core body, a slide groove for the slide bar to pass through is provided on the surface of the positioning block, and the inner wall of the slide groove is slidably connected to the surface of the slide bar.

[0011] Preferably, an annular groove is provided on one side of the positioning ring, and an anti-slip groove is provided on the inner wall of the annular groove.

[0012] Preferably, the number of the balls is four, and the four balls are equidistantly distributed on the inner wall of the mold core body.

[0013] Preferably, the surface of the liner is slidably connected to the inner wall of the core body, and the liner is adapted to the core body.

[0014] Beneficial Effects

[0015] The utility model provides a reusable extrusion die core for cable production, which has the following beneficial effects:

[0016] 1. The cable production reusable extrusion mold core is made by placing the liner inside the mold core body, and then one side of the limit block contacts the surface of the ball, so that the ball squeezes the positioning block, and the positioning spring buffers and resets it. When it needs to be replaced later, the liner is separated from the mold core body when it is not squeezed, so as to facilitate the disassembly operation, thereby facilitating the subsequent use and improving the use efficiency of the mold core.

[0017] 2. The cable production uses a reusable extrusion mold core. By taking out and rotating the liner, the limit blocks on the liner are engaged with different positioning grooves on the mold core body. In this way, the friction surface of the liner can be adjusted four times until all surfaces are severely worn and the entire liner is replaced, which greatly extends the service life of the mold.

[0018] 3. The cable is produced with a reusable extrusion core. The dovetail tangent design is adopted at the junction of the tail end of the liner and the inner cone surface of the core body, so that the inner cone surface can have a smooth transition as a whole, preventing scratches caused by accumulation of the wire core and avoiding the occurrence of quality accidents. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] Figure 1 This is a schematic diagram of the three-dimensional structure of the utility model from the first viewing angle;

[0020] Figure 2 This is a schematic diagram of the three-dimensional structure of the utility model from a second viewing angle;

[0021] Figure 3 It is a three-dimensional structural schematic diagram of the lining of the utility model;

[0022] Figure 4 This is a schematic diagram of the three-dimensional cross-sectional structure of the utility model;

[0023] Figure 5 For this utility model Figure 4 A schematic diagram of the enlarged structure in the middle.

[0024] In the figure: 1. mold core body; 2. positioning ring; 3. positioning spring; 4. positioning block; 5. ball; 6. lining; 7. limit block; 8. slide bar. DETAILED DESCRIPTION

[0025] The following will be combined with the drawings in the embodiments of the utility model to clearly and completely describe the technical solutions in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments in the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.

[0026] See also Figure 1-5 The utility model provides a technical solution: a reusable extrusion core for cable production, comprising a core body 1, a positioning ring 2 is fixedly installed on one side of the core body 1, an annular groove is provided on one side of the positioning ring 2, and an anti-slip pattern is provided on the inner wall of the annular groove.

[0027] A positioning groove is provided on the inner wall of the mold core body 1, a circular hole is provided on the inner wall of the positioning groove, a positioning spring 3 is fixedly installed on the inner wall of the circular hole, a positioning block 4 is fixedly installed on one end of the positioning spring 3, the surface of the positioning block 4 is slidably connected to the inner wall of the circular hole, and the circular hole is adapted to the positioning block 4.

[0028] One side of the positioning block 4 is inlaid with a ball 5 . The number of the ball 5 is four, and the four ball 5 is evenly distributed on the inner wall of the mold core body 1 .

[0029] The inner part of the mold core body 1 is sleeved with an inner lining 6 , and a limit block 7 is fixedly installed on the surface of the inner lining 6 , and the limit block 7 is clamped in the inner part of the positioning groove.

[0030] The liner 6 is placed inside the core body 1, and then one side of the limit block 7 contacts the surface of the ball 5, so that the ball 5 squeezes the positioning block 4, and the positioning spring 3 buffers and resets it. When it needs to be replaced later, when the liner 6 is not squeezed, the liner 6 is separated from the core body 1, so as to facilitate the disassembly operation, thereby facilitating the subsequent use and improving the use efficiency of the core.

[0031] The surface of the liner 6 is slidably connected to the inner wall of the core body 1 , and the liner 6 is adapted to the core body 1 .

[0032] The liner 6 is taken out and rotated so that the limit blocks 7 on the liner 6 are engaged with different positioning grooves on the core body 1. The friction surface of the liner 6 can be adjusted four times until all surfaces are severely worn and the entire liner 6 is replaced, which greatly extends the service life of the mold.

[0033] A clamping groove is provided on one side of the positioning ring 2, a hemispherical groove is provided on one side of the limiting block 7, and the ball 5 is rollingly connected to the inner wall of the hemispherical groove.

[0034] A slide bar 8 is fixedly mounted on the inner wall of the circular hole of the inner wall of the core body 1 , a slide groove for the slide bar 8 to pass through is provided on the surface of the positioning block 4 , and the inner wall of the slide groove is slidably connected to the surface of the slide bar 8 .

[0035] The junction between the tail end of the liner 6 and the inner cone surface of the mold core body 1 adopts a dovetail tangent design, so that the inner cone surface can have a smooth transition as a whole, preventing scratches caused by accumulation of wire cores and avoiding the occurrence of quality accidents.

[0036] The mold core body 1 is made of high-grade nitrided steel 38CrMoAl, which has high surface hardness, wear resistance and fatigue strength, good heat resistance and corrosion resistance, and low hardenability. It is used to make nitrided parts with high wear resistance, high fatigue strength and considerable strength. After treatment, the nitrided parts have high dimensional accuracy, which is consistent with the requirements for mold material selection. Therefore, mold nitrided steel is selected. After the mold is processed, the mold surface needs to be nitrided. The depth of the nitrogen layer needs to be greater than 0.5mm, and the hardness HV after nitrogen needs to be greater than 850 to ensure that the mold core mouth will not be squeezed and deformed under long-term high temperature and high pressure. The wall thickness of the mold mouth needs to meet the strength requirements under the use environment, and its surface is polished to improve the durability of the mold.

[0037] Lining 6 is made of S136. S136 has been refined outside the furnace (VD) + electroslag remelting (ESR), and its structure is purer and finer, with excellent corrosion resistance, polishing, good wear resistance, machinability, and excellent dimensional stability during hardening. Since the main wear surface is on lining 6, the wear resistance of S136 can meet the demand, so it can better reduce the degree of wear, extend the wear cycle and the service life of the mold core.

[0038] The scrap cycle of conventional one-piece mold cores under normal wear is 1 to 2 years. The mold cores produced by this solution are preliminarily evaluated to be able to be used for at least 5 years under normal wear conditions, which greatly improves the service life of the mold, reduces the frequency of purchases, and reduces production costs, achieving the goal of "improving quality, increasing efficiency, and reducing costs."

[0039] Working principle: the liner 6 is placed inside the core body 1, and then one side of the limit block 7 contacts the surface of the ball 5, so that the ball 5 squeezes the positioning block 4, and the positioning spring 3 performs a buffering and resetting operation on it. When it needs to be replaced later, when the liner 6 is not squeezed, the liner 6 is separated from the core body 1, so as to facilitate the disassembly operation, thereby facilitating the subsequent use and improving the use efficiency of the core.

[0040] The liner 6 is taken out and rotated so that the limit blocks 7 on the liner 6 are engaged with different positioning grooves on the core body 1. The friction surface of the liner 6 can be adjusted four times until all surfaces are severely worn and the entire liner 6 is replaced, which greatly extends the service life of the mold.

[0041] 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 reusable extrusion core for cable production, comprising a core body (1), characterized in that: A positioning ring (2) is fixedly mounted on one side of the mold core body (1); a positioning groove is formed on the inner wall of the mold core body (1); a circular hole is formed on the inner wall of the positioning groove; a positioning spring (3) is fixedly mounted on the inner wall of the circular hole; a positioning block (4) is fixedly mounted on one end of the positioning spring (3); and a ball (5) is embedded on one side of the positioning block (4); The interior of the mold core body (1) is sleeved with an inner lining (6), a limit block (7) is fixedly installed on the surface of the inner lining (6), and the limit block (7) is clamped in the interior of the positioning groove.

2. The reusable extrusion core for cable production according to claim 1, characterized in that: A clamping groove is provided on one side of the positioning ring (2), a hemispherical groove is provided on one side of the limiting block (7), and the ball (5) is rollingly connected to the inner wall of the hemispherical groove.

3. The reusable extrusion core for cable production according to claim 1, characterized in that: The surface of the positioning block (4) is slidably connected to the inner wall of the circular hole, and the circular hole is adapted to the positioning block (4).

4. The reusable extrusion die core for cable production according to claim 1, characterized in that: A slide bar (8) is fixedly mounted on the inner wall of the circular hole on the inner wall of the core body (1); a slide groove for the slide bar (8) to pass through is provided on the surface of the positioning block (4); and the inner wall of the slide groove is slidably connected to the surface of the slide bar (8).

5. The reusable extrusion core for cable production according to claim 1, characterized in that: An annular groove is provided on one side of the positioning ring (2), and an anti-slip pattern is provided on the inner wall of the annular groove.

6. The reusable extrusion core for cable production according to claim 1, characterized in that: The number of the balls (5) is four, and the four balls (5) are equidistantly distributed on the inner wall of the mold core body (1).

7. The reusable extrusion core for cable production according to claim 1, characterized in that: The surface of the inner lining (6) is slidably connected to the inner wall of the mold core body (1), and the inner lining (6) is adapted to the mold core body (1).

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