Breve análise de equipamentos auxiliares de extrusora de plástico

The auxiliary equipment of the plastic extrusion unit mainly includes pay-off equipment, equipamento de endireitamento, equipamento de pré-aquecimento, equipamento de refrigeração, equipamento de tração, contador de medidores,

Máquina de teste de faísca, equipamento de captação. O uso da unidade extrusora é diferente, e o equipamento auxiliar utilizado também é diferente. Como dispositivo de bloqueio, secador de cabelo, equipamento de impressão, etc.

Equipamento de alisamento: One of the most common types of plastic extrusion waste products is migraine, www.flyseimm.com , and the tortuous cores of various types are one of the important causes of insulation migraine. In sheath extrusion, scratches on the sheath surface are often formed by the twists of the cable core. Portanto, the straightening equipment in various extrusion units is essential. The main types of straightening equipment are: drum type (divided into horizontal type and straight type); pulley type (divided into single pulley and pulley block); winch type, which has multiple effects such as dragging, straightening, and stable tension; Pressure wheel type (divided into horizontal type and straight type), etc.
Preheating equipment: preheating of the cable core is necessary for both insulation extrusion and sheath extrusion. Em relação à camada de isolamento, especialmente o isolamento de camada fina, a existência de poros não pode ser permitida. O núcleo do fio pode ser completamente removido da superfície da água e do óleo por pré-aquecimento em alta temperatura antes de apertar. Em relação à extrusão da bainha, o principal efeito é secar o núcleo do cabo para evitar a possibilidade de porosidade na bainha devido ao efeito da umidade (ou umidade ao redor da camada de almofada).
O pré-aquecimento também pode evitar que o plástico permaneça na pressão interna devido ao resfriamento repentino durante a extrusão. No processo de extrusão de plástico, o pré-aquecimento pode eliminar o fio frio que entra na matriz de alta temperatura, (extrusora de plástico) a grande diferença de temperatura formada ao tocar o plástico na boca da matriz, evitando a flutuação da temperatura do plástico e da pressão de extrusão. Stable extrusion volume to ensure extrusion quality. Electric heating core preheating equipment is used in the extrusion unit, which needs to have sufficient capacity and ensure rapid heating, so that the core preheating and cable core drying efficiency are high. The preheating temperature is restricted by the pay-off speed, and is usually similar to the head temperature.
Cooling equipment: After the molded plastic extruded layer is separated from the machine head, it should be cooled and shaped immediately, otherwise it will be deformed under the effect of gravity. The cooling method usually uses water cooling, and according to the water temperature, it is divided into rapid cooling and relaxation cooling.
The rapid cooling is direct cooling by cold water. The rapid cooling is beneficial to the shaping of the plastic extruded layer. Contudo, for crystalline polymers, due to the sudden heat cooling, it is easy to leave internal stress in the extruded layer structure, causing cracks during use. The PVC plastic layer is quenched. Slow cooling is to reduce the internal stress of the finished product. Water of different temperatures is placed in the cooling water tank in sections to gradually cool the finished product. The extrusion of PE and PP uses slow cooling, isso é, through hot water, warm water, Three-stage cooling with cold water.
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