A die sleeve heating device for cable extrusion

Abstract

The utility model relates to the technical field of cable processing, specifically to a mold sleeve heating device for cable extrusion, comprising a base body, a mold body is arranged inside the base body, the mold body comprises a lower sleeve body, an intermediate sleeve and a heating tile, an outer hoop body is arranged at the periphery of the heating tile, a fixing nut is arranged at the periphery of the intermediate sleeve, a connecting cylinder is arranged at one end of the outer side of the outer hoop body, and a locking stud is connected to the connecting cylinder. The utility model facilitates the extrusion operation of the low-smoke halogen-free cable after the subsequent production, greatly shortens the production time, improves the extrusion quality of the low-smoke halogen-free cable, and can also reduce the production cost, so it is very practical.

Description

Technical Field

[0001] The utility model relates to the technical field of cable processing, in particular to a die sleeve heating device for cable extrusion. Background Art

[0002] Low smoke halogen-free cable is a wire sheath material used in the wire and cable industry. It is characterized by low smoke emission when heated and does not contain halogen. The sheath of this cable is composed of thermoplastic or thermosetting materials, which will not release hydrogen halides or other acids when burned, thus reducing the toxic and corrosive gases produced during combustion.

[0003] Low smoke halogen-free cables are widely used, mainly in building wire and cable systems, including power supply and distribution, lighting, air conditioning, fire protection facilities, etc. In addition, low smoke halogen-free cables are also widely used in the wiring of communication equipment and network systems, such as indoor optical cables, outdoor optical cables, optical fiber terminal boxes, fiber distribution boxes, etc. In places such as communication rooms and data centers, the use of low smoke halogen-free cables can reduce smoke obstacles during personnel evacuation and improve rescue efficiency. In addition, low smoke halogen-free cables are also widely used in various electrical equipment and control systems in the metallurgical industry.

[0004] The extrusion process is a very critical step in the manufacture of low-smoke halogen-free cables. It involves heating and plasticizing the insulating material or sheath material through an extruder, and extruding it onto the outer layer of the conductor or semi-finished cable to form a continuous insulating layer or sheath layer. For low-smoke halogen-free cables, their insulating layer and sheath layer are usually composed of thermoplastic or thermosetting materials. These materials need to be heated and plasticized by an extruder, and then extruded onto the conductor or semi-finished cable. During the extrusion process, parameters such as temperature, pressure and speed need to be controlled to ensure that the thickness, uniformity and quality of the insulating layer or sheath layer meet the standard requirements. Since the material of low-smoke halogen-free cables does not contain halogen, special attention needs to be paid to the plasticization and fluidity of the material during the extrusion process to avoid quality problems such as bubbles and cracks. However, the existing low-smoke halogen-free cables have the disadvantage of being difficult to extrude.

[0005] Therefore, it is necessary to design a cable extrusion die sleeve heating device to solve the above-mentioned problems. Utility Model Content

[0006] The utility model aims to provide a die sleeve heating device for cable extrusion to solve the problems raised in the above background technology.

[0007] In order to achieve the above purpose, the utility model provides the following technical solutions:

[0008] A mold sleeve heating device for cable extrusion comprises a base body, a mold body is arranged inside the base body, the mold body comprises a lower sleeve body, an intermediate sleeve and a heating tile, an outer hoop body is arranged on the periphery of the heating tile, a fixing nut is arranged on the periphery of the intermediate sleeve, a connecting cylinder is arranged at one end of the outer side of the outer hoop body, and a locking stud is connected to the connecting cylinder.

[0009] As a preferred solution of the utility model, a mold sleeve and an inner mold are respectively provided inside the mold body, and the inner diameter of the mold sleeve is larger than the inner diameter of the inner mold and smaller than the inner diameter of the heating tile.

[0010] As a preferred solution of the utility model, the lower sleeve, the middle sleeve and the heating tile are all designed as an integral whole, and the overall diameter of the lower sleeve is larger than the diameter of the middle sleeve, and the diameter of the middle sleeve is larger than the diameter of the heating tile.

[0011] As a preferred solution of the utility model, the heating tile is a ceramic heating tile or a far-infrared ceramic heating tile, which utilizes an infrared heating tube to generate electromagnetic waves, causing resonance of molecules in the object, causing friction and generating heat energy, thereby achieving the purpose of heating.

[0012] As a preferred solution of the utility model, a crack is opened on one side of the outer hoop body, and connecting cylinders are welded on the outside of the outer hoop body at both ends of the crack, and a threaded groove is opened on the connecting cylinder. The two connecting cylinders are threadedly connected and fixed by locking studs in the threaded grooves on the connecting cylinders.

[0013] As a preferred solution of the utility model, the mold body is fixedly connected by embedding the lower sleeve into a cavity in the middle of the base body.

[0014] Beneficial effect: In view of the problem that most low-smoke halogen-free cables in the prior art have great difficulty in extrusion during the production process, in the utility model, a new mold sleeve structure for extrusion is designed. The mold sleeve structure adopts a design of a lower sleeve, an intermediate sleeve and a heating tile, and a mold sleeve and an inner mold are respectively provided inside, so that the heating tile can be used to heat the cable to be extruded. At the same time, its internal cavity is suitable for low-smoke halogen-free cables, thereby facilitating the extrusion operation of the low-smoke halogen-free cables after subsequent production, which is very practical. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] Figure 1 This is an overall stereogram of a die sleeve heating device for cable extrusion according to the utility model;

[0016] Figure 2 This is a stereoscopic view of the mold body of a mold sleeve heating device for cable extrusion according to the utility model;

[0017] Figure 3This is a schematic diagram of the internal structure of a mold body of a mold sleeve heating device for cable extrusion according to the utility model;

[0018] Figure 4 This is a three-dimensional diagram of the outer hoop body of a die sleeve heating device for cable extrusion according to the utility model.

[0019] In the figure: 1. base body; 2. mold body; 21. lower sleeve body; 22. middle sleeve; 23. heating tile; 24. mold sleeve; 25. inner mold; 3. outer hoop body; 4. fixing nut; 5. connecting cylinder; 6. locking stud. DETAILED DESCRIPTION

[0020] The technical solutions in the embodiments of the utility model will be clearly and completely described below in conjunction with the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, rather than all of the embodiments. Based on the embodiments of the utility model, all other embodiments obtained by ordinary technicians in this field without making creative work are within the scope of protection of the utility model.

[0021] In order to facilitate the understanding of the present invention, the present invention will be described more comprehensively below with reference to the relevant literature, and several embodiments of the present invention are given. However, the present invention can be implemented in many different forms and is not limited to the embodiments described herein. On the contrary, the purpose of providing these embodiments is to make the disclosure of the present invention more thorough and comprehensive.

[0022] It should be noted that when an element is referred to as being "fixed on" another element, it may be directly on the other element or there may also be a central element. When an element is considered to be "connected to" another element, it may be directly connected to the other element or there may be a central element at the same time. The terms "vertical", "horizontal", "left", "right" and similar expressions used in this article are for illustrative purposes only.

[0023] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as commonly understood by technicians in the technical field of the present invention. The terms used in the specification of the present invention are only for the purpose of describing specific embodiments and are not intended to limit the present invention. The term "and / or" used in this article includes any and all combinations of one or more related listed items.

[0024] See also Figure 1-4 , the utility model provides a technical solution:

[0025] A cable extrusion die sleeve heating device comprises a base body 1, a die body 2 is arranged inside the base body 1, the die body 2 comprises a lower sleeve body 21, an intermediate sleeve 22 and a heating tile 23, an outer hoop body 3 is arranged on the periphery of the heating tile 23, a fixing nut 4 is arranged on the periphery of the intermediate sleeve 22, a connecting cylinder 5 is arranged at one end of the outer side of the outer hoop body 3, and a locking stud 6 is connected to the connecting cylinder 5.

[0026] Specifically, the interior of the mold body 2 is also provided with a mold sleeve 24 and an inner mold 25, the inner diameter of the mold sleeve 24 is larger than the inner diameter of the inner mold 25 and smaller than the inner diameter of the heating tile 23; the lower sleeve 21, the middle sleeve 22 and the heating tile 23 are all designed in one piece, and the overall diameter of the lower sleeve 21 is larger than the diameter of the middle sleeve 22, and the diameter of the middle sleeve 22 is larger than the diameter of the heating tile 23; the heating tile 23 is a ceramic heating tile or a far-infrared ceramic heating tile, which uses an infrared heating tube to generate electromagnetic waves, causing resonance of molecules in the object, friction and heat energy, thereby achieving the purpose of heating; in the process of extrusion of low-smoke halogen-free cable, after the material is pushed into the extrusion mold body 2, the heating tile 23 is used to heat the extruded cable. At the same time, due to the limitation of the internal cavity of the mold body 2, the cable material is subjected to the extrusion force of the mold, and then is extruded through the holes of the mold to form the required cable shape, thereby facilitating the extrusion of the low-smoke halogen-free cable.

[0027] The heating tile 23 is a highly efficient and energy-saving heating element. Its working principle is that when its frequency is close to the natural frequency of the molecular motion in the heated object, the infrared heating tube generates electromagnetic waves, causing the resonance of the molecules in the object, friction and heat energy, thereby achieving the purpose of heating. Since the heating tile 23 has the advantages of good sealing performance, high radiation efficiency, good thermal stability, clean and pollution-free, it can improve its heating efficiency and stability for low-smoke halogen-free cables, which is convenient for subsequent extrusion.

[0028] Furthermore, by changing the material composition and winding method of the heating wire, the heating tile 23 can emit infrared radiation of different wavelengths, so that the electromagnetic wave frequency of the infrared heating tube and the inherent frequency of the molecular motion in the heated object are as close as possible to achieve the maximum heating effect. The specifications of the heating tile 23 are diverse, and the common ones are 60×60mm, 120×60mm, 240×60mm, 245×60mm, 100×100mm, 120×120mm, 200×200mm, 300×200mm, 300×250mm, 300×300mm, 400×280mm, etc. The specific specifications in this scheme require which of the above can be selected according to actual production. This scheme does not limit it, and it will not affect the effect brought about by the implementation of this technical scheme.

[0029] Specifically, a crack is opened on one side of the outer hoop body 3, and connecting cylinders 5 are welded to the outsides of the outer hoop body 3 at both ends of the crack, and a threaded groove is opened on the connecting cylinder 5. The two connecting cylinders 5 are threadedly connected and fixed by locking studs 6 located in the threaded grooves on the connecting cylinders 5; the mold body 2 is embedded in the cavity in the middle of the base body 1 through the lower sleeve 21 for fixed connection; the outer hoop body 3 is sleeved and installed on the periphery of the heating tile 23 on the mold body 2, and the locking studs 6 are used to pass through the threaded grooves on the connecting cylinder 5 for locking and fixing, so as to achieve the goal of fixing the mold body 2 inside the base body 1.

[0030] In summary, the utility model not only facilitates the extrusion operation after the subsequent production of low-smoke halogen-free cables, greatly shortens the production time, and improves the extrusion quality of low-smoke halogen-free cables, but also reduces production costs, and is very practical.

[0031] 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 cable extrusion die sleeve heating device, comprising a base body (1), characterized in that: A mold body (2) is arranged inside the base body (1), and the mold body (2) includes a lower sleeve (21), an intermediate sleeve (22) and a heating tile (23), and an outer hoop body (3) is arranged on the periphery of the heating tile (23), and a fixing nut (4) is arranged on the periphery of the intermediate sleeve (22), and a connecting cylinder (5) is arranged at one end of the outer side of the outer hoop body (3), and a locking stud (6) is connected to the connecting cylinder (5).

2. A cable extrusion die sleeve heating device according to claim 1, characterized in that: A mold sleeve (24) and an inner mold (25) are also provided inside the mold body (2), and the inner diameter of the mold sleeve (24) is larger than the inner diameter of the inner mold (25) and smaller than the inner diameter of the heating tile (23).

3. A cable extrusion die sleeve heating device according to claim 1, characterized in that: The lower sleeve (21), the middle sleeve (22) and the heating tile (23) are all designed as an integral whole, and the overall diameter of the lower sleeve (21) is larger than the diameter of the middle sleeve (22), and the diameter of the middle sleeve (22) is larger than the diameter of the heating tile (23).

4. A cable extrusion die sleeve heating device according to claim 1, characterized in that: The heating tile (23) is a ceramic heating tile or a far-infrared ceramic heating tile, which utilizes an infrared heating tube to generate electromagnetic waves, causing resonance of molecules in an object, causing friction and generating heat energy, thereby achieving the purpose of heating.

5. The cable extrusion die sleeve heating device according to claim 1, characterized in that: A crack is formed on one side of the outer hoop body (3), and connecting cylinders (5) are welded to the outer sides of the outer hoop body (3) at both ends of the crack, and a thread groove is formed on the connecting cylinder (5). The two connecting cylinders (5) are threadedly connected to be fixed by locking studs (6) in the thread grooves on the connecting cylinders (5).

6. A cable extrusion die sleeve heating device according to claim 1, characterized in that: The mold body (2) is embedded in a cavity in the middle of the base body (1) through a lower sleeve body (21) for fixed connection.

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