影响PE管材质量的诸多因素

影响PE管材质量的诸多因素

　管材的质量是厂家和使用单位关注的焦点，怎样把握管材的质量就显得如此重要了。据双壁波纹管获悉，对PE管材的质量至关重要的诸多因素有原料选择、温度、螺杆转速、压缩空气、牵引速度、牵引冷却等等。

　　1、牵引速度因素对PE管材质量的影响：牵引速度直接影响产品壁厚。牵引速度应与挤出速度相配合，通常是牵引速度比管材挤出速度高1%~10%。

　　2、压缩空气对管材质量的影响：压缩空气使管子定型并保持一定圆度。其压力一般为

　　3、牵引冷却对管材质量的影响：这点相信大家都比较了解，冷却达不到会使挤出料粘连，无法定型。最好是采用风冷结合水冷，冷却水温度要保持在15度左右。

　　4、原料的选择是最基本的也是第一道因素：PE原材料的规格牌号种类繁多，数不胜数，同样一种牌号的原材料可以生产PE波纹管但却不能山产PE给水管。在这里还是需要厂家自己去多多试验，选择适合自已生产管材的料。

　　5、温度对PE管材质量的影响：温度是影响塑化及塑料管材生产的主要因索，温度过低，塑化不好，温度过高，物料易分解。温度的控制应根据原配方、挤出机及机头结构、螺杆转速等因素确定。加工硬pvc管材时，因加工温度与分解温度颇为接近，生产中应严格控制各点的料温。同时注意测温仪表的误差及测量点的位置。

　　6、螺杆转速对管材质量的影响：螺杆转速的选择直接影响产量和质量。转速增加，挤出量增加，物料受到的剪切力大，有助于物料的塑化，但是物料在螺杆内的停留时间较短，过高的摩擦热使管内壁比较粗糙、管材强度下降。所以，螺杆转速的控制应根据产量、产品外观和物理力学性能要求全面权衡。

Many factors affecting the quality of PE pipes

　The quality of pipes is the focus of attention of manufacturers and users. How to grasp the quality of pipes is so important. According to the double-wall corrugated pipe, many factors that are critical to the quality of PE pipes include raw material selection, temperature, screw speed, compressed air, traction speed, traction cooling and so on.

　　 1. The influence of traction speed factors on the quality of PE pipes: the traction speed directly affects the wall thickness of the product. The pulling speed should be matched with the extrusion speed, usually the pulling speed is 1%~10% higher than the pipe extrusion speed.

　　2. The influence of compressed air on the quality of the pipe: compressed air will shape the pipe and maintain a certain roundness. The pressure is generally

　　3. The influence of traction cooling on the quality of pipes: I believe everyone is better aware of this. Failure to reach the cooling level will make the extruded material sticky and cannot be shaped. It is best to use air cooling combined with water cooling, and the cooling water temperature should be kept at about 15 degrees.

　　4. The choice of raw materials is the most basic and the first factor: There are many types of PE raw materials, and there are countless varieties. The same brand of raw materials can produce PE corrugated pipes but cannot produce PE water supply pipes. Here it is still necessary for the manufacturer to conduct a lot of experiments on its own, and choose the materials suitable for their own production of pipes.

　　5. The influence of temperature on the quality of PE pipes: temperature is the main factor affecting plasticization and plastic pipe production. If the temperature is too low, the plasticization is not good, and the temperature is too high, and the material is easy to decompose. The temperature control should be determined according to the original formula, extruder and die structure, screw speed and other factors. When processing hard pvc pipes, because the processing temperature is quite close to the decomposition temperature, the material temperature at each point should be strictly controlled during production. At the same time pay attention to the error of the temperature measuring instrument and the position of the measuring point.

　　6. The influence of screw speed on pipe quality: The choice of screw speed directly affects output and quality. As the speed increases, the extrusion volume increases, and the shearing force of the material is large, which is helpful for the plasticization of the material. However, the residence time of the material in the screw is shorter, and the excessively high friction heat makes the inner wall of the pipe rough and the strength of the pipe material decreases. Therefore, the control of screw speed should be fully weighed according to the requirements of output, product appearance and physical and mechanical properties.