Extrusion die for cable production

Abstract

The utility model relates to the technical field of cable production, in particular to a cable production extrusion die which comprises a shell, a die core, a flow guide hole, a feeding pipe, a die cover and a threading hole. The die core is arranged at one end of the shell, one end of the die core extends into the shell, and the other end of the die core is sleeved with a die sleeve which fixes the die core to the end of the shell through a bolt and is matched with the die core to extrude the surface layer of the cable in the using state. Melted raw materials are directly guided to the flow guide holes through the shape of the connecting rod, so that the conveying efficiency of the raw materials is improved, the raw materials are prevented from being accumulated in the sleeve, meanwhile, the flow guide holes are arranged around the fixed disc at equal angles, and the flow guide holes are obliquely arranged, so that when the melted raw materials flow to the inner side of the die sleeve through the flow guide holes, the raw materials are uniformly distributed. The inlet and outlet positions are changed, so that raw materials discharged from the flow guide holes are obliquely started between the mold core and the mold sleeve, and the situation that upper material liquid flows downwards due to linear movement, and consequently discharging is uneven is avoided.

Description

Technical Field

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

[0002] During cable production, an extrusion die is used to directly coat the wire core during the preparation of the insulation layer to make the cable, which is a method of cable production.

[0003] In the prior art, a Chinese patent document with authorization announcement number CN220904060U discloses a cable production extrusion die, comprising: a cable production device body and a cooling component, a limit component, the limit component comprising a mold core, a limit block fixed on the outer surface of one side of the mold core, a plurality of leakage holes being provided on the outer surface of the limit block, a plurality of bolts being movably embedded in the interior of the limit block, a mold sleeve being threadedly connected between the outer surfaces of the plurality of bolts, and a mold outlet being provided on the outer surface of the mold sleeve.

[0004] However, when the above scheme is in use, the cavity and the mold core of the mold sleeve are cylindrical and conical respectively. When the material is discharged through the protrusion and the die outlet, the melted raw material will accumulate on the inside of the cavity of the mold sleeve, resulting in waste of the melted raw material. The leakage hole is a through hole arranged along the length direction of the mold sleeve. When the melted raw material is transported, the flow of the melted raw material is a linear flow, and the melted raw material has flow characteristics. The amount of raw material in the lower part of the cavity of the mold sleeve will be greater than the amount of raw material in the upper part, resulting in uneven discharge of the material. Utility Model Content

[0005] The utility model aims to solve the problems existing in the background technology and proposes a cable production extrusion die.

[0006] The technical solution of the utility model is: a cable production extrusion die, comprising a shell, a die core, a guide hole, a feed pipe, a die cover and a threading hole;

[0007] The mold core is arranged at one end of the housing and extends into the housing. The other end of the mold core is provided with a mold sleeve which fixes the mold core to the end of the housing by bolts and cooperates with the mold core to extrude the surface layer of the cable when in use.

[0008] The feed pipe is installed on the outside of the shell and is connected to the shell for communicating with an external conveying device to convey the melted raw materials into the shell;

[0009] There are multiple guide holes, which are obliquely arranged on the middle end surface of the mold core for spirally conveying the melted raw materials inside the shell to the inside of the mold sleeve when in use;

[0010] The threading hole is arranged in the middle of the mold core and the mold cover for moving the cable in the threading hole when in use.

[0011] Preferably, the housing comprises a sleeve and a mold cover;

[0012] The sleeve is mounted on one end of the mold core;

[0013] The mold cover is mounted on the other end of the sleeve through bolts for closing the other end of the sleeve when in use.

[0014] Preferably, the side of the mold cover is provided with a mold base whose side extends to the inner side of the sleeve and is sleeved on one end of the mold core; when the sleeve and the mold cover are in a mating installation state, the mold base is accommodated in the sleeve, and one end of the mold core is accommodated in the mold base.

[0015] Preferably, a step is provided on the inner side of one end of the sleeve and the mold sleeve. When the sleeve, the mold core and the mold sleeve are fitted together, both ends of the middle of the mold core are fitted together on the steps inside the sleeve and the mold sleeve.

[0016] Preferably, the mold core includes a fixed disk, a connecting rod and a core body;

[0017] The fixing plate is arranged between the sleeve and the mold sleeve, and the two ends thereof extend into the sleeve and the mold sleeve respectively;

[0018] The connecting rod is arranged at the middle of one end of the fixed disk and is sealed with the mold cover on the inner side of the sleeve;

[0019] The core body is arranged at the middle of the other end of the fixed disk and located on the inner side of the die sleeve for controlling the shape of the material extruded by the die sleeve in a use state.

[0020] Preferably, the outer diameter of one end of the connecting rod gradually increases from the mold cover toward the fixed disk along the length direction of the connecting rod.

[0021] Preferably, the sleeve, the mold core and the mold sleeve are sealed and coaxially arranged.

[0022] Preferably, a cavity is provided on the inner side of the mold sleeve, and the outer size of the core body is smaller than the size of the cavity.

[0023] Compared with the prior art, the above technical solution of the present invention has the following beneficial technical effects:

[0024] The utility model uses the shape of the connecting rod to directly guide the melted raw material to the guide hole, thereby improving its conveying efficiency and avoiding its accumulation in the sleeve. At the same time, the multiple guide holes are arranged at equal angles around the fixed plate, and the guide holes are set at an angle. When the melted raw material flows to the inside of the mold sleeve through the guide hole, the entry and exit positions change, so that the raw material discharged from the guide hole starts to tilt between the mold core and the mold sleeve, avoiding the upper material liquid flowing downward due to linear movement, resulting in uneven discharge. BRIEF DESCRIPTION OF THE DRAWINGS

[0025] Figure 1 This is a three-dimensional diagram of an embodiment of the present invention.

[0026] Figure 2 This is a schematic cross-sectional view of the overall structure of an embodiment of the present invention.

[0027] Figure 3 This is an exploded schematic diagram of the overall structure of an embodiment proposed by the present invention.

[0028] Figure 4 This is a schematic diagram of the mold core structure in an embodiment of the present utility model.

[0029] Figure 5 This is a schematic diagram of the guide hole structure in an embodiment of the present invention.

[0030] Figure numerals: 1. sleeve; 2. mold core; 21. fixed plate; 22. connecting rod; 23. core body; 24. guide hole; 3. mold sleeve; 4. feed pipe; 5. mold cover; 6. threading hole; 7. step; 8. mold base; 9. sealing gasket; 10. cavity. DETAILED DESCRIPTION

[0031] Example 1

[0032] like Figure 1-5 As shown, the utility model proposes a cable production extrusion die, including a shell, a die core 2, a guide hole 24, a feed pipe 4, a die cover 5 and a threading hole 6;

[0033] The mold core 2 is arranged at one end of the shell and one end extends into the shell. The other end of the mold core 2 is provided with a mold sleeve 3, which fixes the mold core 2 to the end of the shell by bolts and cooperates with the mold core 2 to extrude the surface layer of the cable when in use; wherein sealing gaskets 9 are provided at both ends of the middle part of 2 for driving the sleeve 1 and the mold sleeve 3 to extrude it by bolts when in use, so that the sleeve 1, mold core 2 and the mold sleeve 3 are sealed and connected.

[0034] The feed pipe 4 is installed on the outside of the shell and is connected to the shell for communicating with an external conveying device to convey the melted raw materials into the shell;

[0035] There are multiple guide holes 24, which are obliquely arranged on the middle end surface of the mold core 2 for spirally conveying the melted raw material inside the shell to the inside of the mold sleeve 3 when in use; wherein the multiple guide holes 24 are arranged at equal angles around the center of the mold core 2;

[0036] The threading hole 6 is set in the middle of the mold core 2 and the mold cover 5. It is used to move the cable in the threading hole 6 when in use so that the cable moves synchronously with the material discharged by the mold sleeve 3, and the cable is located in the middle of the material for combination while the mold sleeve 3 discharges the material.

[0037] In an optional embodiment, the housing includes a sleeve 1 and a mold cover 5;

[0038] The sleeve 1 is sleeved on one end of the mold core 2;

[0039] The mold cover 5 is mounted on the other end of the sleeve 1 by means of bolts for closing the other end of the sleeve 1 when in use.

[0040] In an optional embodiment, the sleeve 1 , the mold core 2 and the mold sleeve 3 are sealed and arranged coaxially.

[0041] In this embodiment, the mold core 2 is fixed between the sleeve 1 and the mold sleeve 3 by bolts, and the sleeve 1, the mold core 2 and the mold sleeve 3 are coaxially installed to improve the stability of the mold core 2. At the same time, the two ends of the mold core 2 extend into the sleeve 1 and the mold sleeve 3 respectively, so that the mold core 2 is sealed with the mold cover 5 covered on the end of the sleeve 1, and the external conveying device is connected through the feed pipe 4 to convey the melted raw material between the sleeve 1 and the mold core 2, and convey it between the mold core 2 and the mold sleeve 3 through the guide hole 24, so that it passes through the gap between the mold core 2 and the mold sleeve 3 to the outside of the mold sleeve 3 The raw materials are discharged from the side, and at the same time, the cable is transported by the wire threading hole 6 in the middle of the mold cover 5 and the mold core 2, so that the cable passes through the mold core 2 and moves in combination with the raw materials in the middle of the discharged raw materials. At the same time, the melted raw materials in the sleeve 1 are tilted and moved toward the mold sleeve 3 through the inclined arrangement of the guide holes 24. Because there are multiple guide holes 24, the movement trajectory of the melted raw materials in the sleeve 1 through the multiple guide holes 24 to the mold sleeve 3 is spiral, which avoids the melted raw materials from flowing downward due to their own characteristics, resulting in uneven discharge during discharge.

[0042] Example 2

[0043] like Figure 2As shown, the utility model proposes a cable production extrusion die. Compared with Example 1, in this embodiment, the side of the mold cover 5 is provided with a mold base 8 whose side extends to the inner side of the sleeve 1 and is sleeved on one end of the mold core 2; when the sleeve 1 and the mold cover 5 are installed in a cooperative manner, the mold base 8 is cooperatively accommodated in the sleeve 1, and one end of the mold core 2 is cooperatively accommodated in the mold base 8 for limiting the end position of the mold core 2 in the use state, wherein a sealing gasket is provided between the mold cover 5 and the sleeve 1, which is used to press the mold cover 5 tightly against the end of the mold core 2 and to seal the sleeve 1, the mold core 2 and the mold cover 5.

[0044] Example 3

[0045] like Figure 2 As shown, the utility model proposes a cable production extrusion die. Compared with Example 1, in this embodiment, a step 7 is provided on the inner side of one end of the sleeve 1 and the die sleeve 3. When the sleeve 1, the die core 2 and the die sleeve 3 are installed in a matched state, the middle ends of the die core 2 are matched and installed at the steps 7 inside the sleeve 1 and the die sleeve 3, wherein the die core 2 and the steps 7 of the sleeve 1 and the die sleeve 3 are clearance matched and the clearance is the minimum clearance.

[0046] In this embodiment, the mold core 2 is installed in the sleeve 1 and the mold sleeve 3 through the step 7, so that the positions of the sleeve 1, the mold core 2 and the mold sleeve 3 are limited, and the sleeve 1, the mold core 2 and the mold sleeve 3 are coaxially arranged to avoid uneven discharge when the mold sleeve 3 and the mold core 2 cooperate to discharge the material.

[0047] Example 4

[0048] like Figure 4 As shown, the present invention proposes a cable production extrusion die. Compared with the first embodiment, in this embodiment, the die core 2 includes a fixed plate 21, a connecting rod 22 and a core body 23;

[0049] The fixing plate 21 is disposed between the sleeve 1 and the die sleeve 3, and both ends extend into the sleeve 1 and the die sleeve 3 respectively;

[0050] The connecting rod 22 is arranged in the middle of one end of the fixed disk 21 and is sealed with the mold cover 5 on the inner side of the sleeve 1; it should be noted that the outer diameter of one end of the connecting rod 22 gradually increases from the mold cover 5 toward the fixed disk 21 along the length direction of the connecting rod 22, so as to directly guide the melted raw material on the inner side of the sleeve 1 to the guide hole 24 when in use, so as to avoid the situation where the fixed disk 21 blocks the movement of the molten raw material.

[0051] The core body 23 is arranged in the middle of the other end of the fixed disk 21 and is located on the inner side of the mold sleeve 3. It should be noted that a cavity 10 is provided on the inner side of the mold sleeve 3. The outer size of the core body 23 is smaller than the size of the cavity 10. There is a gap between the outer side of the core body 23 and the edge of the cavity 10 for discharging the melted raw material to the outside of the mold sleeve 3 through the gap when in use, so as to control the shape of the material extruded by the mold sleeve 3.

[0052] To sum up, when the present invention is in use, the external conveying device is connected through the feed pipe 4 to convey the melted raw material between the sleeve 1 and the mold core 2, and the melted raw material is directly guided to the guide hole 24 through the shape of the connecting rod 22, so that the melted raw material is conveyed between the mold sleeve 3 and the mold core 2. During the conveying process, a plurality of guide holes 24 are arranged at equal angles around the fixed disk 21, and the guide holes 24 are inclined. When the melted raw material moves from one end of the fixed disk 21 to the other end through the guide holes 24, it is eccentric, and the melted raw material is conveyed obliquely into the mold sleeve 3, so that the melted raw material moves spirally in the mold sleeve 3, avoiding the melted raw material being located at the lower inner part of the mold sleeve 3 due to its flow characteristics; and is discharged to the outside of the mold sleeve 3 through the cooperation of the core body 23. At the same time, the cable is conveyed by the mold cover 5 and the threading hole 6 in the middle of the mold core 2, so that the cable is combined with the material discharged to the outside of the mold sleeve 3 when passing through the mold core 2, so that the material is wrapped around the outside of the cable, and the cable is continuously extruded under continuous processing.

[0053] The embodiments of the present invention are described in detail above with reference to the accompanying drawings, but the present invention is not limited thereto. Various changes can be made within the knowledge scope of those skilled in the art without departing from the purpose of the present invention.

Claims

1. A cable production extrusion die, characterized in that: It comprises a shell, a mold core (2), a flow guide hole (24), a feed pipe (4), a mold cover (5) and a threading hole (6); The mold core (2) is arranged at one end of the housing and one end extends into the housing. The other end of the mold core (2) is provided with a mold sleeve (3) which fixes the mold core (2) to the end of the housing by bolts and cooperates with the mold core (2) to extrude the surface layer of the cable when in use. A feed pipe (4) is installed on the outside of the shell and is in communication with the shell for communicating with an external conveying device to convey the melted raw materials into the shell; There are a plurality of guide holes (24), and the guide holes (24) are obliquely arranged on the middle end surface of the mold core (2) for spirally conveying the raw material melted inside the shell to the inside of the mold sleeve (3) when in use; A threading hole (6) is provided in the middle of the mold core (2) and the mold cover (5) for moving the cable through the threading hole (6) in a use state.

2. A cable production extrusion die according to claim 1, characterized in that: The housing comprises a sleeve (1) and a mold cover (5); The sleeve (1) is sleeved on one end of the mold core (2); The mold cover (5) is mounted on the other end of the sleeve (1) by means of bolts and is used to close the other end of the sleeve (1) when in use.

3. A cable production extrusion die according to claim 2, characterized in that: The side of the mold cover (5) is provided with a mold base (8) whose side extends to the inner side of the sleeve (1) and is sleeved on one end of the mold core (2); when the sleeve (1) and the mold cover (5) are in a cooperative installation state, the mold base (8) is cooperatively accommodated in the sleeve (1), and one end of the mold core (2) is cooperatively accommodated in the mold base (8).

4. A cable production extrusion die according to claim 1, characterized in that: A step (7) is provided on the inner side of one end of the sleeve (1) and the die sleeve (3); when the sleeve (1), the die core (2) and the die sleeve (3) are in a fitted state, the middle ends of the die core (2) are fitted on the steps (7) inside the sleeve (1) and the die sleeve (3).

5. A cable production extrusion die according to claim 1, characterized in that: The mold core (2) includes a fixed plate (21), a connecting rod (22) and a core body (23); The fixed disk (21) is arranged between the sleeve (1) and the mold sleeve (3), and its two ends extend into the sleeve (1) and the mold sleeve (3) respectively; The connecting rod (22) is arranged at the middle of one end of the fixed disk (21) and is sealed and connected to the mold cover (5) on the inner side of the sleeve (1); The core (23) is arranged at the middle of the other end of the fixed disk (21) and located on the inner side of the die sleeve (3) for controlling the shape of the material extruded by the die sleeve (3) in a use state.

6. A cable production extrusion die according to claim 5, characterized in that: The outer diameter of one end of the connecting rod (22) gradually increases from the mold cover (5) toward the fixed disk (21) along the length direction of the connecting rod (22).

7. A cable production extrusion die according to claim 1, characterized in that: The sleeve (1), the mold core (2) and the mold sleeve (3) are sealed and arranged coaxially.

8. A cable production extrusion die according to claim 5, characterized in that: A cavity (10) is provided on the inner side of the mold sleeve (3), and the outer size of the core body (23) is smaller than the size of the cavity (10).

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