Multi-layer co-extrusion extruder head for cable

Abstract

The utility model discloses a multi-layer co-extrusion extruder head for a cable, which relates to the technical field of cable manufacture and comprises a casing and a die core fixedly arranged in the casing, two ends of the die core penetrate through outlets arranged on two sides of the casing, a die group consisting of a plurality of dies which are mutually sleeved is sleeved outside the die core, and the die group is connected with the casing. A plurality of material conveying channels are formed between the die set and the die core, the die core and the die are provided with cable channels for cables to go in and out, and the die is provided with a feeding connector. According to the utility model, the plurality of molds are sleeved outside the mold core in a sliding manner, the driving assembly can be utilized to drive the adjacent molds to generate relative motion, so that the molds outside the mold core can be automatically detached one by one, and meanwhile, the sealing assembly is arranged to seal the adjacent molds, so that the leakage of the material conveying channel is avoided, and the production efficiency is improved. Compared with the prior art, the mold can be disassembled more efficiently, and the mold is convenient to maintain.

Description

Technical Field

[0001] The utility model relates to the technical field of cable manufacturing, in particular to a multi-layer co-extrusion extruder head for cables. Background Art

[0002] In order to ensure the safety of wires and cables, the outside of the cables are wrapped with an insulating layer. The insulating layer is generally a multi-layer structure and is extruded by multi-layer co-extrusion. Therefore, a multi-layer co-extrusion extruder is required. However, the structural stability of the head of the existing multi-layer co-extrusion extruder is poor, and the mold core is prone to displacement.

[0003] After searching, it was found that the Chinese invention patent application with publication number CN115071098A discloses a multi-layer co-extrusion cable head, including a mold core, an inner mold, a middle mold and an outer mold; the inner mold is sleeved on the outer side of the mold core and forms an inner material feed channel with the mold core; the middle mold is sleeved on the outer side of the inner mold and forms a middle material feed channel with the inner mold; the outer mold is sleeved on the outer side of the middle mold and forms an outer material feed channel with the middle mold; the outer surface of the mold core, the outer surface of the inner mold and the outer surface of the middle mold are all fixed with a plurality of limit blocks; the inner surface of the inner mold, the inner surface of the middle mold and the outer surface of the outer mold have a plurality of slots matching the limit blocks, and the limit blocks can be detachably embedded in the slots.

[0004] The principle is: the core, inner mold, middle mold and outer mold are fixed by matching limit blocks and slots, so as to realize the positioning and fixation of the core, inner mold, middle mold and outer mold. At the same time, the mold relatively to the outside and the mold relatively to the inside are fixedly connected by multiple fixing bolts, so as to realize the fixation of the core, inner mold, middle mold and outer mold. The above technology has the following problems: since multiple molds are sleeved together to realize co-extrusion, the mold sleeved on the inner layer is inconvenient to disassemble and maintain. The existing technology uses fixing bolts to fix the molds, and sets limit blocks and slots for fixing, forming a double fixation. When the staff disassembles and maintains the mold, they need to remove the bolts and then pull out the limit blocks from the slots, so that they can disassemble the mold, which is time-consuming and labor-intensive. Utility Model Content

[0005] The utility model aims to provide a multi-layer co-extrusion extrusion head for cables, so as to solve the technical problem that the multi-layer co-extrusion extrusion heads on the market currently have difficulty in disassembling the mold for maintenance, as mentioned in the above background technology.

[0006] To achieve the above-mentioned purpose, the utility model provides the following technical solutions: a multi-layer co-extrusion extruder head for cables, comprising a housing and a mold core fixed in the housing, the two ends of the mold core pass through outlets opened on both sides of the housing, and the outer sleeve of the mold core is provided with a mold group composed of a plurality of mutually sleeved molds, and a plurality of material feeding channels are formed between the mold group and the mold core, the mold core and the mold are provided with cable channels for cables to enter and exit, and the mold is provided with a feed interface;

[0007] The die is slidably connected in the housing, and the cable multi-layer co-extrusion extruder head also includes:

[0008] A driving assembly, which has a plurality of driving assemblies, each of which is connected to each of the molds, and is used to drive the mold connected thereto to generate relative movement with the mold core, so that the mold is separated from the outside of the mold core and slides out through the outlet;

[0009] A guide assembly, which is used to limit the shaking freedom of the mold during movement;

[0010] The sealing component is used to fit the gap interface between the molds to seal the material conveying channel.

[0011] As a preferred technical solution of the utility model, the mold group includes an inner mold, a middle mold and an outer mold which are arranged outside the mold core from inside to outside, wherein the inner mold is arranged on the outside of the mold core, the middle mold is arranged on the outside of the inner mold, and the outer mold is arranged on the outside of the middle mold.

[0012] As a preferred technical solution of the utility model, the feed channel includes:

[0013] An inner material feeding channel formed between the inner wall of the inner mold and the outer wall of the mold core;

[0014] A middle material delivery channel formed between the inner wall of the middle mold and the outer wall of the inner mold;

[0015] An external material feeding channel is formed between the inner wall of the outer mold and the outer wall of the middle mold.

[0016] As a preferred technical solution of the utility model, the driving assembly includes:

[0017] A movable block, which is arranged outside the mold;

[0018] A screw rod, one end of which is engaged with a screw rod slot provided in the movable block;

[0019] The motor is arranged outside the casing, and the output shaft of the motor passes through the inner wall of the casing and is connected with the other end of the screw rod.

[0020] As a preferred technical solution of the utility model, the guide assembly includes:

[0021] A guide block, which is arranged outside the mold;

[0022] One end of the guide rod is fixed inside the housing, and the other end of the guide rod is matched with a slide groove provided in the guide block.

[0023] As a preferred technical solution of the utility model, the sealing assembly includes:

[0024] a baffle disposed outside the mold;

[0025] A spring, one end of which is connected to one side of the baffle;

[0026] A sealing plate is connected to the other end of the spring, and the sealing plate is in close contact with the end of the mold relative to the outside.

[0027] As a preferred technical solution of the utility model, a sealing ring is threadedly connected to the outlet, and the sealing ring is used to seal the gap between the outer mold and the outlet.

[0028] As a preferred technical solution of the utility model, the upper end of the casing is hingedly connected with a revolving door.

[0029] Compared with the prior art, the beneficial effects of the utility model are:

[0030] The utility model arranges multiple mold sliding sleeves outside the mold core, and can use the driving component to drive the adjacent molds to produce relative movement, so that the molds outside the mold core can be automatically removed one by one. At the same time, a sealing component is provided to seal the adjacent molds to avoid leakage of the material feeding channel. Compared with the existing technology, the mold can be disassembled more efficiently and the maintenance of the mold is convenient. BRIEF DESCRIPTION OF THE DRAWINGS

[0031] Figure 1 It is a three-dimensional structural schematic diagram of the utility model;

[0032] Figure 2 It is a partial three-dimensional structural schematic diagram of the utility model;

[0033] Figure 3 It is a schematic diagram of the half-section structure of the mold core, inner mold, middle mold and outer mold of the utility model;

[0034] Figure 4 For the utility model Figure 3 The enlarged structural diagram at A in the middle;

[0035] Figure 5 It is a half-cut three-dimensional structural schematic diagram of the mold core, inner mold, middle mold and outer mold of the utility model;

[0036] Figure 6 It is a half-section three-dimensional structural schematic diagram of the mold core, inner mold, middle mold and outer mold of the utility model.

[0037] In the figure: 1. casing; 2. revolving door; 3. outlet; 4. sealing ring; 5. core; 6. first cable channel; 6001, second cable channel; 7. baffle; 8. spring; 9. sealing plate; 10. feed interface; 11. inner mold; 12. movable block; 13. screw rod; 14. motor; 15. guide block; 16. guide rod; 17. middle mold; 18. outer mold. DETAILED DESCRIPTION

[0038] The technical solutions in the embodiments of the present invention will be described clearly and completely below in conjunction with the drawings in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, rather than all of the embodiments.

[0039] See also Figure 1-6 The utility model provides a technical solution: a multi-layer co-extrusion extruder head for a cable, comprising a housing 1 and a mold core 5 arranged in the housing 1, both ends of the mold core 5 pass through outlets 3 opened on both sides of the housing 1, and the outer sleeve of the mold core 5 is provided with a mold group composed of a plurality of mutually sleeved molds, and a plurality of feeding channels are formed between the mold group and the mold core 5, and the mold is provided with a feed interface 10 for feeding the inner shielding layer material, the insulating layer material and the outer shielding layer material into the corresponding feeding channels for extrusion. Specifically, the mold group includes an inner mold 11 arranged inside and outside the mold core 5, The middle mold 17 and the outer mold 18, wherein the inner mold 11 is sleeved on the outer side of the mold core 5, the middle mold 17 is sleeved on the outer side of the inner mold 11, and the outer mold 18 is sleeved on the outer side of the middle mold 17; wherein the feed channel includes: an inner feed channel, which is formed between the inner wall of the inner mold 11 and the outer wall of the mold core 5 and is used to transport the inner shielding layer material; a middle feed channel, which is formed between the inner wall of the middle mold 17 and the outer wall of the inner mold 11 and is used to transport the insulating material; an outer feed channel, which is formed between the inner wall of the outer mold 18 and the outer wall of the middle mold 17 and is used to transport the outer shielding layer material.

[0040] like Figure 6 As shown, the core 5 and the mold are provided with cable channels for the cables to enter and exit; they are the second cable channels 6001 provided in the inner mold 11, the middle mold 17 and the outer mold 18, and the first cable channel 6 provided in the core 5;

[0041] Adopt the above technical solution

[0042] like Figure 2 and Figure 3As shown, the mold is slidably connected in the casing 1, and the multi-layer co-extrusion extruder head for cables also includes: a driving assembly, which has multiple components, and each driving assembly is connected to each mold, and the driving assembly is used to drive the mold connected thereto to produce relative movement with the mold core 5, so that the mold is separated from the outside of the mold core 5 and slides out through the outlet 3; specifically, the driving assembly includes: a movable block 12, which is arranged outside the mold; a screw rod 13, one end of which cooperates with the screw rod groove opened in the movable block 12; a motor 14, which is arranged outside the casing 1, and the output shaft of the motor 14 passes through the inner wall of the casing 1 and is connected to the other end of the screw rod 13; a guide assembly, which is used to limit the shaking freedom of the mold during movement; specifically, the guide assembly includes: a guide block 15, which is arranged outside the mold; a guide rod 16, one end of which is fixed inside the casing 1, and the other end of the guide rod 16 cooperates with the slide groove opened in the guide block 15;

[0043] The above technical solution can realize automatic disassembly of the mold, which is conducive to maintenance work. When the outer mold 18 needs to be disassembled, the motor 14 is started to drive the screw 13 to rotate, and the screw 13 drives the movable block 12 to slide, thereby driving the outer mold 18 to slide. Since the outer mold 18 is provided with a guide block 15, when the outer mold 18 slides, the slide groove of the guide block 15 can cooperate with the guide rod 16 to guide the movement of the outer mold 18 to prevent the outer mold 18 from moving crookedly, until the outer mold 18 passes through the outlet 3 and disengages from the screw 13, the outer mold 18 can be disassembled from the middle mold 17. Similarly, the middle mold 17 can be disassembled from the inner mold 11, and the inner mold 11 can be disassembled from the mold core 5, so as to facilitate the maintenance of the inner mold 11, the middle mold 17 and the outer mold 18;

[0044] When the outer mold 18 needs to be installed back into the middle mold 17, the screw groove of the movable block 12 of the outer mold 18 is aligned and inserted, and the sliding groove of the guide block 15 is aligned with the guide rod 16 and inserted, and the motor 14 is started to drive the screw 13 to reverse, thereby resetting the outer mold 18.

[0045] like Figure 4 As shown, the sealing assembly is used to fit the gap junction between the molds, so as to seal the feeding channel; specifically, the sealing assembly includes: a baffle 7, which is arranged outside the mold; a spring 8, one end of which is connected to one side of the baffle 7; a sealing plate 9, which is connected to the other end of the spring 8, and the sealing plate 9 is in close contact with the end of the mold relative to the outside;

[0046] The above technical solution can better seal the feed channel. When the outer mold 18 needs to be installed back into the middle mold 17, the end of the outer mold 18 can come into contact with the sealing plate 9 due to the provision of the sealing plate 9, and the spring 8 is squeezed, so that the sealing plate 9 can fit tightly between the outer mold 18 and the middle mold 17 to seal the gap in the outer feed channel.

[0047] Further, such as Figure 1 and Figure 2 As shown, a sealing ring 4 is threadedly connected at the outlet 3, and the sealing ring 4 is used to seal the gap between the outer mold 18 and the outlet 3;

[0048] The above technical solution can prevent foreign matter from entering the interior of the housing 1 through the gap between the outer mold 18 and the outlet 3 .

[0049] Further, such as Figure 1 As shown, the upper end of the housing 1 is hingedly connected to a revolving door 2;

[0050] The above technical solution can be used to conveniently open the revolving door 2 and perform maintenance on the equipment components inside the casing 1 .

[0051] Working principle: When the outer mold 18 needs to be disassembled, the motor 14 is started to drive the screw 13 to rotate, and the screw 13 drives the movable block 12 to slide, thereby driving the outer mold 18 to slide. Since the outer mold 18 is provided with a guide block 15, when the outer mold 18 slides, the slide groove of the guide block 15 can cooperate with the guide rod 16 to guide the movement of the outer mold 18 to prevent the outer mold 18 from moving crookedly, until the outer mold 18 passes through the outlet 3 and disengages from the screw 13, the outer mold 18 can be disassembled from the middle mold 17. Similarly, the middle mold 17 can be disassembled from the inner mold 11, and the inner mold 11 can be disassembled from the mold core 5, so as to facilitate the maintenance of the inner mold 11, the middle mold 17 and the outer mold 18;

[0052] When the outer mold 18 needs to be installed back into the middle mold 17, the screw groove of the movable block 12 of the outer mold 18 is aligned and inserted, and the sliding groove of the guide block 15 is aligned with the guide rod 16 and inserted, and the motor 14 is started to drive the screw 13 to reverse, so that the outer mold 18 is reset. Due to the provision of the sealing plate 9, the end of the outer mold 18 can be in contact with the sealing plate 9, and the spring 8 is squeezed, so that the sealing plate 9 can fit tightly between the outer mold 18 and the middle mold 17, and the gap of the external feed channel is sealed.

[0053] Thereby completing a series of tasks, the contents not described in detail in this specification belong to the prior art known to professional and technical personnel in this field.

[0054] It is obvious to those skilled in the art that the present invention is not limited to the details of the exemplary embodiments described above, and that the present invention can be implemented in other specific forms without departing from the spirit or essential features of the present invention. Therefore, the embodiments should be regarded as exemplary and non-restrictive from any point of view, and the scope of the present invention is defined by the appended claims rather than the above description, and it is intended that all changes falling within the meaning and scope of the equivalent elements of the claims be included in the present invention. Any reference numeral in a claim should not be regarded as limiting the claim to which it relates.

Claims

1. A multi-layer co-extrusion extruder head for a cable, comprising a housing (1) and a core (5) fixedly arranged in the housing (1), the two ends of the core (5) passing through outlets (3) opened on both sides of the housing (1), and the outer part of the core (5) is provided with a die set consisting of a plurality of mutually sleeved dies, and a plurality of material delivery channels are formed between the die set and the core (5), the core (5) and the die are provided with cable channels for cables to enter and exit, and the die is provided with a feed interface (10); It is characterized in that The die is slidably connected to the housing (1), and the cable multi-layer co-extrusion extruder head also includes: A plurality of drive assemblies, each of which is connected to each of the molds, and is used to drive the mold connected thereto to generate relative movement with the mold core (5), so that the mold is detached from the outside of the mold core (5) and slides out through the outlet (3); A guide assembly, which is used to limit the shaking freedom of the mold during movement; The sealing component is used to fit the gap interface between the molds to seal the material conveying channel.

2. The multi-layer co-extrusion extruder head for cables according to claim 1, characterized in that: The mold set comprises an inner mold (11), a middle mold (17) and an outer mold (18) which are arranged outside the mold core (5) from inside to outside, wherein the inner mold (11) is sleeved on the outside of the mold core (5), the middle mold (17) is sleeved on the outside of the inner mold (11), and the outer mold (18) is sleeved on the outside of the middle mold (17).

3. The multi-layer co-extrusion extruder head for cables according to claim 2, characterized in that: The feeding channel comprises: An internal material delivery channel formed between the inner wall of the inner mold (11) and the outer wall of the mold core (5); A middle material delivery channel formed between the inner wall of the middle mold (17) and the outer wall of the inner mold (11); An external material feeding channel is formed between the inner wall of the outer mold (18) and the outer wall of the middle mold (17).

4. The multi-layer co-extrusion extruder head for cables according to claim 1, characterized in that: The drive assembly comprises: A movable block (12) arranged outside the mold; A screw rod (13), one end of which is matched with a screw rod groove provided in the movable block (12); The motor (14) is arranged outside the casing (1), and the output shaft of the motor (14) passes through the inner wall of the casing (1) and is connected to the other end of the screw rod (13).

5. The multi-layer co-extrusion extruder head for cables according to claim 4, characterized in that: The guide assembly comprises: A guide block (15) arranged outside the mold; One end of the guide rod (16) is fixed inside the housing (1), and the other end of the guide rod (16) cooperates with a slide groove provided in the guide block (15).

6. The multi-layer co-extrusion extruder head for cables according to claim 1, characterized in that: The sealing assembly comprises: a baffle (7) arranged outside the mold; A spring (8), one end of which is connected to one side of the baffle (7); A sealing plate (9) is connected to the other end of the spring (8), and the sealing plate (9) is in close contact with the end of the mold relative to the outside.

7. The multi-layer co-extrusion extruder head for cables according to claim 1, characterized in that: The outlet (3) is threadedly connected with a sealing ring (4), and the sealing ring (4) is used to seal the gap between the outer mold (18) and the outlet (3).

8. The multi-layer co-extrusion extruder head for cables according to claim 1, characterized in that: The upper end of the casing (1) is hingedly connected to a revolving door (2).

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