Industry News_News_Wuxi Tengyu Environmental Protection Technology Co.,Ltd

07-26 

Correct operation method and precautions of open mill

The open mill focuses on use and maintenance. Good operating habits and process protection can greatly increase the life of the machine and reduce the safety factor of the operator when using it. Protecting the safety and health of workers in production is an important policy of our country. Protecting national property and promoting production development are important duties of enterprise management.

07-26 

The rules before turning on the mill must be followed one by one!

The correct operation of the mill must first adjust the roll pitch and maintain the balance of the roll pitch. If the adjustment of the roller pitch at both ends is different, it will cause the rollers to be unbalanced and easily damage the equipment. This is strictly prohibited. After the work is finished, cut off the power supply and close the water and steam valves.

07-26 

The working principle of internal mixer

An internal mixer is a machine that is equipped with a pair of rotors with a specific shape and relatively rotating, and intermittently plasticizes and mixes polymer materials in a closed state with adjustable temperature and pressure. The following editor of Xianji.com will introduce the working principle, structure, purpose, operation method and precautions of the internal mixer in detail.

11-26 

What are the mixing principles of the open mill

What are the mixing principles of the open mill The mixing process of an open mill generally includes three stages: wrapping roll, eating powder and turning.

10-21 

Factors affecting the mixing effect of internal mixer

The rotor type and the number of ridges, the number of ridges is high, the shearing speed is high, but the heat rise is high, which shortens the mixing time and affects the mixing quality. Affected by the rotor type, the shear-type dispersion zone is between the rotor edge and the mixing chamber. The force range is large and wide, the shearing force is large, the efficiency is high, and the mixing quality is good. In the meshing type, the dispersion zone is between the two rotors, the shearing force is small, the heat generation is low, and the mixing time is long, and the dispersion effect is better. 2.上顶栓压力上顶栓作用是将胶料保持在密炼室混炼工作区内，压力不足会引起胶料在密炼室壁和转子表面上滑动。适当压力可减小物料内的空隙，增加接触力。压力大会使胶料温度升高，混炼功率增大。装填容量不足，上顶栓压力则不能充分发挥作用，胶料分散不均。 3.温度每种橡胶都有其最佳混炼温度范围。生胶、补强剂、软化剂的种类和用量决定混炼温升状况。在同一温度下，混炼时间越长分散越好。 4.填充量取决于密炼机自身之有效容积。配方中生胶类型，补强填充剂和增塑剂的用量。生胶可塑度大者装料量应大些。填充系数(重量)在0.65~0.75之间，装料量不足混炼无法获得必要之剪切力。 5.投料的顺序，顺序效果各不同在自动系统混炼中基本选择(使用多段混炼，根据胶料要求)生胶--提坨--加填充剂/配合剂--压坨--提坨--加软化剂压 --提坨--压坨 --提坨排料。 6.转速转速与剪切速率成正比，剪切速率大则均匀混炼加快。提高转速会使胶温升高，导致胶料粘度和剪切应力降低。 7.时间混炼时间长短与填充量的多少、配方温升状况有关，各种胶料混炼温度影响时间，密炼机转速、上顶栓压力也会影响混炼时间，所以在混炼工艺尽量缩短辅助时间和投料时间。 8.冷却水冷却水温度一般设置15度，低粘度胶料不易用热水冷却，易粘转子，高粘度胶料采热水冷却，提高冷却水温度可缩短混炼时间，降低能量消耗，提高生产效率。