A cable jacket extruder outer die

Abstract

The utility model discloses a cable sheath extruder outer mode relates to cable processing equipment technical field, the utility model discloses a outer mode cover and tungsten alloy nose, be equipped with the first circular truncated cone mould cavity in the outer mode cover, and the top of outer mode cover is equipped with the nose mounting hole, the lower extreme of tungsten alloy nose is installed in the nose mounting hole, and the upper extreme of tungsten alloy nose is equipped with the circular truncated cone convex part that projects upwards, be equipped with the second circular truncated cone mould cavity in the tungsten alloy nose, and the taper angle of second circular truncated cone mould cavity and first circular truncated cone mould cavity is equal, and the axis is same, and the inner cavity wall of second circular truncated cone mould cavity and first circular truncated cone mould cavity is connected, and the circular truncated cone extrusion mould cavity for extruding cable sheath is constituted together. The utility model discloses can automatically fall off die port flow casting impurity, and the wear resistance of die port inner wall is good, and after the long time work of extruder outer mode, the die port inner wall can keep good smoothness, avoid the impurity of deposit, and the quality of cable sheath extrusion product is good.

Description

Technical Field

[0001] This utility model relates to the field of cable processing equipment technology, and in particular to an outer mold for a cable sheath extrusion machine. Background Technology

[0002] The outer mold of the cable sheath extruder is the extrusion mold for the outer insulation protective layer of the cable, also known as the extrusion mold. The extrusion tube of the cable extruder (also known as the cable extruder) is connected to the outer mold of the cable sheath extruder. The insulating molten material in the extrusion tube is extruded through the outer mold of the cable sheath extruder to form a sheath outside the cable.

[0003] In existing technologies, such as Chinese patent document CN206840663U, the outer surface of the die opening of the cable sheath extruder is a planar structure. When the cable and its outer sheath pass through the die opening, the molten insulating material easily flows and forms flow debris on the outer surface of the die opening. This flow debris is difficult to automatically detach from the planar outer surface of the die opening and often requires manual removal by workers, which is time-consuming and labor-intensive, and can also affect the extrusion quality of the cable sheath. On the other hand, the outer die of the cable sheath extruder in the prior art is usually made entirely of stainless steel or mold steel, which has insufficient wear resistance. After long-term operation, the inner wall of the die opening of the cable sheath extruder easily becomes rough and its smoothness deteriorates, making it easy for impurities to accumulate and affecting the extrusion quality of the cable sheath. Utility Model Content

[0004] The technical problem to be solved by this utility model is to provide an outer mold for a cable sheath extruder, which can automatically remove the cast material from the die opening, has good wear resistance on the inner wall of the die opening, and can maintain good smoothness on the inner wall of the die opening after long-term operation, thus avoiding the accumulation of impurities and resulting in good quality cable sheath extrusion.

[0005] To solve the above-mentioned technical problems, the technical solution of this utility model is: an outer mold for a cable sheath extrusion machine, comprising an outer mold sleeve and a tungsten alloy protrusion. The outer mold sleeve has a first frustum-shaped mold cavity inside, and the top of the outer mold sleeve has a protrusion mounting hole. The lower end of the tungsten alloy protrusion is installed in the protrusion mounting hole, and the upper end of the tungsten alloy protrusion has an upwardly protruding frustum-shaped protrusion. The tungsten alloy protrusion has a second frustum-shaped mold cavity inside, and the second frustum-shaped mold cavity has the same cone angle and the same axis as the first frustum-shaped mold cavity. The second frustum-shaped mold cavity is connected to the inner wall of the first frustum-shaped mold cavity, together forming a frustum-shaped extrusion mold cavity for extruding cable sheaths.

[0006] In the above technical solution, the outer mold sleeve is cylindrical in shape, and a cylindrical connecting platform protruding upwards is provided at the center of the top of the outer mold sleeve. The nozzle mounting hole is cylindrical in shape and located at the center of the cylindrical connecting platform. The lower end of the tungsten alloy nozzle is provided with a cylindrical nozzle connecting part that matches the nozzle mounting hole, and the cylindrical nozzle connecting part is welded inside the nozzle mounting hole. Furthermore, a cylindrical hole is also provided inside the upper end of the tungsten alloy nozzle. The cylindrical hole is connected to the top of the second frustum-shaped mold cavity, and the axis of the cylindrical hole is the same as that of the second frustum-shaped mold cavity. The diameter of the cylindrical hole is equal to the diameter of the top surface of the second frustum-shaped mold cavity.

[0007] In the above technical solution, the outer mold sleeve has a diameter of 34.5-35.5 mm and a height of 34.5-35.5 mm; the cylindrical connecting platform has a diameter of 21.8-22.2 mm and a height of 3.9-4.1 mm; the tungsten alloy protrusion has a height of 7.9-8.1 mm; the cylindrical protrusion connecting part has a diameter of 12.9-13.1 mm and a height of 3.95-4.05 mm; the top surface diameter of the frustum-shaped protrusion has a diameter of 5.45-5.55 mm and a height of 3.95-4.05 mm; and the cylindrical hole has a diameter of 4.45-4.55 mm and a height of 0.49-0.51 mm.

[0008] In the above technical solution, the cone angle of the frustum-shaped extrusion cavity is 39-40 degrees, and the cone angle of the frustum-shaped protrusion is 84.5-85.5 degrees.

[0009] In the above technical solution, the outer mold sleeve is a stainless steel outer mold sleeve.

[0010] The beneficial effects of this utility model are: (1) Since the upper end of the tungsten alloy nozzle is provided with an upwardly protruding frustum-shaped protrusion, when the cable sheath is extruded, the molten insulating material flowing out of the die opening position of the second frustum-shaped die cavity of the tungsten alloy nozzle will automatically fall off, without the need for manual removal by workers, thus avoiding the molten material from affecting the extrusion quality of the cable sheath; (2) Since this utility model uses a tungsten alloy nozzle, which has good wear resistance, it can ensure that the inner wall of the second frustum-shaped die cavity, i.e. the inner wall of the die opening, maintains good smoothness after long-term operation, avoids the accumulation of impurities, and the extrusion quality of the cable sheath is good. Attached Figure Description

[0011] Figure 1 This is a longitudinal sectional view of the outer mold of a cable sheath extruder.

[0012] Figure 2 This is a dimensioned drawing of the outer mold of a cable sheath extruder.

[0013] In the figure: 1. Outer mold sleeve; 11. First frustum mold cavity; 12. Protrusion mounting hole; 13. Cylindrical connecting platform; 2. Tungsten alloy protrusion; 21. Frustum protrusion; 22. Second frustum mold cavity; 23. Cylindrical hole; 24. Cylindrical protrusion connecting part. Detailed Implementation

[0014] The structural and working principles of this utility model will be further described in detail below with reference to the accompanying drawings.

[0015] like Figure 1 and Figure 2 As shown, this utility model is an outer mold for a cable sheath extrusion machine, including an outer mold sleeve 1 and a tungsten alloy protrusion 2. The outer mold sleeve 1 has a first frustum-shaped mold cavity 11 inside, and the top of the outer mold sleeve 1 has a protrusion mounting hole 12. The lower end of the tungsten alloy protrusion 2 is installed inside the protrusion mounting hole 12. The upper end of the tungsten alloy protrusion 2 has an upwardly protruding frustum-shaped protrusion 21. The tungsten alloy protrusion 2 has a second frustum-shaped mold cavity 22 inside. The cone angle (i.e., the original cone apex angle of the frustum) of the second frustum-shaped mold cavity 22 is equal to that of the first frustum-shaped mold cavity 11, and the axes are the same. The second frustum-shaped mold cavity 22 is connected to the inner wall of the first frustum-shaped mold cavity 11, together forming a frustum-shaped extrusion mold cavity for extruding cable sheaths. Because the upper end of the tungsten alloy nozzle 2 has an upwardly protruding frustum-shaped protrusion 21, when extruding and molding the cable sheath, the molten insulating material flowing out of the die opening position of the second frustum-shaped mold cavity 22 of the tungsten alloy nozzle 2 will automatically fall off without the need for manual removal by workers, thus avoiding the molten material from affecting the extrusion quality of the cable sheath. The tungsten alloy nozzle 2 used in this invention has the characteristics of good wear resistance, which can ensure that the inner wall of the second frustum-shaped mold cavity 22, i.e. the inner wall of the die opening, maintains good smoothness after long-term operation, avoids the accumulation of impurities, and results in good extrusion quality of the cable sheath.

[0016] like Figure 1 As shown, the outer mold sleeve 1 is cylindrical in shape. A cylindrical connecting platform 13 protrudes upwards from the center of the top of the outer mold sleeve 1. The cylindrical connecting platform 13 is used to lock the outer mold sleeve 1 in place by an external component (not shown). The nozzle mounting hole 12 is cylindrical in shape and located in the center of the cylindrical connecting platform 13. The lower end of the tungsten alloy nozzle 2 has a cylindrical nozzle connecting part 24 that matches the nozzle mounting hole 12. The cylindrical nozzle connecting part 24 is welded into the nozzle mounting hole 12, preferably using friction welding. The cylindrical nozzle connecting part 24 facilitates the creation of a second frustum-shaped mold cavity 22 within it.

[0017] like Figure 1As shown, a cylindrical hole 23 is also provided inside the upper end of the tungsten alloy protrusion 2. The cylindrical hole 23 is connected to the top of the second frustum-shaped mold cavity 22. The axis of the cylindrical hole 23 is the same as that of the second frustum-shaped mold cavity 22, and the diameter of the cylindrical hole 23 is equal to the diameter of the top surface of the second frustum-shaped mold cavity 22. The cylindrical hole 23 can serve as a shaping tool for the cable sheath.

[0018] like Figure 2 As shown, in this embodiment, the outer mold sleeve 1 has a diameter of 34.5-35.5 mm, preferably 35 mm, and a height of 34.5-35.5 mm, preferably 35 mm; the cylindrical connecting platform 13 has a diameter of 21.8-22.2 mm, preferably 22 mm, and a height of 3.9-4.1 mm, preferably 4 mm; the tungsten alloy protrusion 2 has a height of 7.9-8.1 mm, preferably 8 mm; and the cylindrical protrusion connecting part 24 has a straight... The diameter is 12.9-13.1 mm, preferably 13 mm, and the height is 3.95-4.05 mm, preferably 4 mm; the top surface diameter of the frustum-shaped protrusion 21 is 5.45-5.55 mm, preferably 5.5 mm, and the height is 3.95-4.05 mm, preferably 4 mm; the diameter of the cylindrical hole 23 is 4.45-4.55 mm, preferably 4.5 mm, and the height is 0.49-0.51 mm, preferably 0.5 mm. The cone angle of the frustum-shaped extrusion die cavity is 39-40 degrees, preferably 39.5 degrees, and the cone angle of the frustum-shaped protrusion 21 is 84.5-85.5 degrees, preferably 85 degrees.

[0019] As a preferred embodiment of this utility model, the outer mold sleeve 1 is a stainless steel outer mold sleeve, more preferably a 304 stainless steel outer mold sleeve, which has lower cost and is easier to process.

[0020] The above description is merely a preferred embodiment of this utility model. Any minor modifications, equivalent changes, and alterations made to the above embodiments based on the technical solution of this utility model shall fall within the scope of the technical solution of this utility model.

Claims

1. An outer mold for a cable sheath extruder, characterized in that: The device includes an outer mold sleeve (1) and a tungsten alloy protrusion (2). The outer mold sleeve (1) has a first frustum-shaped mold cavity (11) inside. The top of the outer mold sleeve (1) has a protrusion mounting hole (12). The lower end of the tungsten alloy protrusion (2) is installed inside the protrusion mounting hole (12). The upper end of the tungsten alloy protrusion (2) has an upwardly protruding frustum-shaped protrusion (21). The tungsten alloy protrusion (2) has a second frustum-shaped mold cavity (22) inside. The second frustum-shaped mold cavity (22) has the same cone angle and the same axis as the first frustum-shaped mold cavity (11). The second frustum-shaped mold cavity (22) is connected to the inner wall of the first frustum-shaped mold cavity (11) to form a frustum-shaped extrusion mold cavity for extruding cable sheaths.

2. The outer mold of the cable sheath extruder according to claim 1, characterized in that: The outer mold sleeve (1) is cylindrical in shape. The top center of the outer mold sleeve (1) is provided with an upwardly protruding cylindrical connecting platform (13). The protrusion mounting hole (12) is cylindrical in shape and is located in the middle of the cylindrical connecting platform (13). The lower end of the tungsten alloy protrusion (2) is provided with a cylindrical protrusion connecting part (24) that matches the protrusion mounting hole (12). The cylindrical protrusion connecting part (24) is welded inside the protrusion mounting hole (12).

3. The outer mold of the cable sheath extruder according to claim 2, characterized in that: The upper end of the tungsten alloy protrusion (2) is also provided with a cylindrical hole (23), which is connected to the top of the second frustum mold cavity (22). The cylindrical hole (23) and the second frustum mold cavity (22) have the same axis, and the diameter of the cylindrical hole (23) is equal to the diameter of the top surface of the second frustum mold cavity (22).

4. The outer mold of the cable sheath extruder according to claim 3, characterized in that: The outer mold sleeve (1) has a diameter of 34.5-35.5 mm and a height of 34.5-35.5 mm; the cylindrical connecting platform (13) has a diameter of 21.8-22.2 mm and a height of 3.9-4.1 mm; the tungsten alloy protrusion (2) has a height of 7.9-8.1 mm; the cylindrical protrusion connecting part (24) has a diameter of 12.9-13.1 mm and a height of 3.95-4.05 mm; the top surface diameter of the frustum-shaped protrusion (21) has a diameter of 5.45-5.55 mm and a height of 3.95-4.05 mm; the cylindrical hole (23) has a diameter of 4.45-4.55 mm and a height of 0.49-0.51 mm.

5. The outer mold of the cable sheath extruder according to claim 4, characterized in that: The outer mold sleeve (1) has a diameter of 35mm and a height of 35mm; the cylindrical connecting platform (13) has a diameter of 22mm and a height of 4mm; the tungsten alloy protrusion (2) has a height of 8mm; the cylindrical protrusion connecting part (24) has a diameter of 13mm and a height of 4mm; the top surface diameter of the frustum-shaped protrusion (21) is 5.5mm and a height of 4mm; the cylindrical hole (23) has a diameter of 4.5mm and a height of 0.5mm.

6. The outer mold of the cable sheath extruder according to claim 1, characterized in that: The cone angle of the frustum-shaped extrusion cavity is 39-40 degrees, and the cone angle of the frustum-shaped protrusion (21) is 84.5-85.5 degrees.

7. The outer mold of the cable sheath extruder according to claim 6, characterized in that: The cone angle of the frustum-shaped extrusion cavity is 39.5 degrees, and the cone angle of the frustum-shaped protrusion (21) is 85 degrees.

8. The outer mold of the cable sheath extruder according to claim 1, characterized in that: The outer mold sleeve (1) is a stainless steel outer mold sleeve.

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