| 挤出机 |
| 添加时间：2019/3/11 15:18:25 浏览次数： |
| 挤出机是在螺杆作用下将熔融塑料通过固定形状的挤出口挤出，在牵引机作用下经水冷定型后切割．主要用于各种相同截面产品的大量持续生产，如管\棒\异型材等，也可用于塑料改性造粒． The extruder is used to extrude molten plastics through a fixed shape extrusion outlet under the action of screw and cut after water cooling setting under the action of tractor. It is mainly used for the continuous production of various products with the same cross-section, such as pipe rod profiles, etc. and also for plastic modified granulation. 挤出的基本机理很简单——一个螺杆在筒体中转动并把塑料向前推动。螺杆实际上是一个斜面或者斜坡，缠绕在中心层上。其目的是增加压力以便克服较大的阻力。就一台挤出机而言，有3种阻力需要克服：固体颗粒（进料）对筒壁的摩擦力和螺杆转动前几圈时（进料区）它们之间的相互摩擦力；熔体在筒壁上的附着力；熔体被向前推动时其内部的物流阻力。 The basic mechanism of extrusion is simple - a screw rotates in the cylinder and pushes the plastic forward. The screw is actually a slope or slope, wound around the central layer. The aim is to increase zhongyaogui.71ix.comzhenkongdai.37ix.com.cnshuitong.71ix.comdibanms.37ix.com.cn langan.37ix.com.cnbaiyangdian.37ix.com.cnpressure in order to overcome greater resistance. As far as an extruder is concerned, there are three kinds of resistance to be overcome: the frictional force of solid particles (feed) on the cylinder wall and the mutual frictional force between them when the screw rotates in the first few circles (feed area); the adhesion force of melt on the cylinder wall; and the internal flow resistance when the melt is pushed forward. |
| 上一页 挤出机起源于18世纪 |
| 下一页 塑料机械设备历史 |
Copyright © 技术支持：遨游网络