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电缆用挤出模具的种类
电缆用挤出模具的种类
Types of extrusion dies for cables
模具是产品定型的装置，是塑料挤出全过程中最后热压作用装置，其几何形状、结构形式和尺寸，温度高低、压力大小等直接决定电缆加工的成败，因此任何挤塑产品模具的设计、选配及其保温措施都受到高度重视。在用塑料挤出机挤制电线电缆的绝缘层和护套层时，模具是控制塑料挤包层厚度的关键。
The mould is the device for product finalization and the final hot pressing device in the whole process of plastic extrusion. Its geometry, structural form and size, temperature and pressure directly determine the success or failure of cable processing. Therefore, the design, selection and insulation measures of any extrusion product mold are highly valued. When the insulation and sheath of wires and cables are extruded by plastic extruder, the mold is the key to control the thickness of plastic extrusion layer.
一般挤出模具按挤出方式可分为：挤压式、挤管式、半挤管（挤压）式三种。其配合方式见图：
The general extrusion die can be divided into three types according to extrusion mode: extrusion type, extrusion type and semi extrusion (extrusion) type. The matching mode is shown in the figure:
挤压式模具 挤管式模具 半挤管式模具
Extrusion die tube extruding die semi extruding die
挤压式模具：模芯与模套定径区内侧有一定的距离，利用压力实现产品最后定型的，塑料通过挤压，直接挤包在线芯或缆芯上，挤出紧密结实、表面平整光滑。但其易偏心，使用寿命不长，配模要求较高，挤出线芯弯曲性能不好。适合用于小规格线芯的挤出；挤包要求紧密、外表要求圆整、均匀的线芯；以及塑料拉伸比较小者等。
Extrusion die: there is a certain distance between the die core and the inner side of the die sleeve sizing area, and the product is finalized by pressure. The plastic is directly extruded on the wire core or cable core by extrusion, and the extrusion is tight and firm, and the surface is smooth and smooth. However, it is easy to eccentric, the service life is not long, the die matching requirements are high, and the bending performance of the extruded core is not good. It is suitable for extrusion of small size wire core, compact and round and uniform wire core with small plastic drawing ratio.
挤管式模具：模芯有“长嘴”，配合时一般将模芯嘴与模套口持平，这样就组成挤管式模具。其是利用塑料的可拉伸性，与挤压式模具相比，具有高效率、易调偏、挤出线芯的弯曲性能好、使用寿命长、配模互换性强等优点，但在挤出致密性、挤出质量等方面不如挤压式模具。
Extrusion die: the die core has a "long nozzle". When matching, the die core nozzle and the die sleeve mouth are generally flat, thus forming an extrusion die. Compared with the extruding die, the die has the advantages of high efficiency and good interchangeability.
半挤管式模具：又称半挤压式模具，模芯有“短嘴”，一般模芯模嘴在模套定径区的1/2处。半挤管式模具与挤管式模具大体相同，只是模嘴长度比挤管式短，模套定径区长度也比挤管式稍短，其吸取了挤管式和挤压式的优点，改善了上面两种方式模具的缺点，适用性较广，但线芯柔软性较差或线芯弯曲时，不宜采用此类模具挤出。
Semi extrusion die: also known as semi extrusion die, the die core has a "short nozzle", generally, the die core die nozzle is 1 / 2 of the die sleeve sizing area. The semi extruding die and the extruding die are roughly the same, but the length of the die nozzle is shorter than that of the extruding type, and the length of the sizing zone of the die sleeve is also slightly shorter than that of the extrusion type. It absorbs the advantages of the extrusion type and the extrusion type, and improves the disadvantages of the above two methods. The applicability is wide. However, when the flexibility of the wire core is poor or the wire core is bent, this kind of die should not be used for extrusion.
Types of extrusion dies for cables
模具是产品定型的装置，是塑料挤出全过程中最后热压作用装置，其几何形状、结构形式和尺寸，温度高低、压力大小等直接决定电缆加工的成败，因此任何挤塑产品模具的设计、选配及其保温措施都受到高度重视。在用塑料挤出机挤制电线电缆的绝缘层和护套层时，模具是控制塑料挤包层厚度的关键。
The mould is the device for product finalization and the final hot pressing device in the whole process of plastic extrusion. Its geometry, structural form and size, temperature and pressure directly determine the success or failure of cable processing. Therefore, the design, selection and insulation measures of any extrusion product mold are highly valued. When the insulation and sheath of wires and cables are extruded by plastic extruder, the mold is the key to control the thickness of plastic extrusion layer.
一般挤出模具按挤出方式可分为：挤压式、挤管式、半挤管（挤压）式三种。其配合方式见图：
The general extrusion die can be divided into three types according to extrusion mode: extrusion type, extrusion type and semi extrusion (extrusion) type. The matching mode is shown in the figure:
挤压式模具 挤管式模具 半挤管式模具
Extrusion die tube extruding die semi extruding die
挤压式模具：模芯与模套定径区内侧有一定的距离，利用压力实现产品最后定型的，塑料通过挤压，直接挤包在线芯或缆芯上，挤出紧密结实、表面平整光滑。但其易偏心，使用寿命不长，配模要求较高，挤出线芯弯曲性能不好。适合用于小规格线芯的挤出；挤包要求紧密、外表要求圆整、均匀的线芯；以及塑料拉伸比较小者等。
Extrusion die: there is a certain distance between the die core and the inner side of the die sleeve sizing area, and the product is finalized by pressure. The plastic is directly extruded on the wire core or cable core by extrusion, and the extrusion is tight and firm, and the surface is smooth and smooth. However, it is easy to eccentric, the service life is not long, the die matching requirements are high, and the bending performance of the extruded core is not good. It is suitable for extrusion of small size wire core, compact and round and uniform wire core with small plastic drawing ratio.
挤管式模具：模芯有“长嘴”，配合时一般将模芯嘴与模套口持平，这样就组成挤管式模具。其是利用塑料的可拉伸性，与挤压式模具相比，具有高效率、易调偏、挤出线芯的弯曲性能好、使用寿命长、配模互换性强等优点，但在挤出致密性、挤出质量等方面不如挤压式模具。
Extrusion die: the die core has a "long nozzle". When matching, the die core nozzle and the die sleeve mouth are generally flat, thus forming an extrusion die. Compared with the extruding die, the die has the advantages of high efficiency and good interchangeability.
半挤管式模具：又称半挤压式模具，模芯有“短嘴”，一般模芯模嘴在模套定径区的1/2处。半挤管式模具与挤管式模具大体相同，只是模嘴长度比挤管式短，模套定径区长度也比挤管式稍短，其吸取了挤管式和挤压式的优点，改善了上面两种方式模具的缺点，适用性较广，但线芯柔软性较差或线芯弯曲时，不宜采用此类模具挤出。
Semi extrusion die: also known as semi extrusion die, the die core has a "short nozzle", generally, the die core die nozzle is 1 / 2 of the die sleeve sizing area. The semi extruding die and the extruding die are roughly the same, but the length of the die nozzle is shorter than that of the extruding type, and the length of the sizing zone of the die sleeve is also slightly shorter than that of the extrusion type. It absorbs the advantages of the extrusion type and the extrusion type, and improves the disadvantages of the above two methods. The applicability is wide. However, when the flexibility of the wire core is poor or the wire core is bent, this kind of die should not be used for extrusion.
