Throwing bricks: Problems in ensuring high-quality products in PP and PE granulation workshops
Thread Content
In the production of PP and PE, there is a problem of high-quality finished products. In the granulation workshop, how to ensure the granular shape of the product? The prices of high-quality products and ordinary products on the market are different. At present, the high-grade product rate of domestic granulators needs to be improved, and there is still a long way to go. I have also contacted other domestic companies and there are many problems, mainly focusing on the opening ratio of the granulator, the wear-resistant layer of the template, thermal uniformity, etc. Please participate in the discussion, my wealth will fully support the discussion in this post. Strive to work together to create good products and participate in international competition.
Factors affecting the appearance of product particles, from the perspective of equipment: 1. Selection and installation of the cutter 2. Adjustment of the installation gap of the cutter on the measuring tool platform 3. Adjustment of the gap between the cutter and the template 4. The verticality of the template and the cutter axis, etc., will affect the shape and quality of the particles. It is generally best to choose a cutter that is ground from a batch of grinding tools. When installing the cutter, go to the measuring tool platform and use a feeler gauge to measure the gap. If the gap does not meet the requirements, replace it resolutely. It is best to measure the gap between the cutter and the template with a feeler gauge to ensure that the gap between the cutter and the template meets the requirements. Factors affecting the appearance of product particles, from a process perspective: 1. Temperature and heating uniformity of the template : If the temperature is too high, paste will be produced. If the temperature is too low, it will affect the opening rate of the template. Temperature control of the template is key. Generally, the template is heated with 35-45 kilograms of medium-pressure steam. When using steam heating, it is necessary to ensure that the steam trap is unobstructed and the steam pressure is stable. Only then can the temperature be stable, the template can be heated evenly, and the opening rate and discharge speed can not be affected. Templates heated with oil are generally heated evenly and have stable temperature control. 2. In preparation for pulling materials before starting the machine, the materials and paste must be pulled clean. It requires empirical judgment to look at the opening rate of the template and the cleanliness of the materials. 3. The temperature of the pellet water is also the key to ensuring the quality of the material. Too high or too low will have a great impact on the extrusion rate and cutting effect of the material. 4. The mixing and melting effects of the mixer and melting pump also have a great impact on the product. In short, to ensure the quality of product particles, it is necessary to ensure the smooth operation of the entire system, operate it according to process requirements and equipment requirements, and control the quality of process and equipment maintenance, control, and operation. This is a systematic project. The barber's knowledge is limited, please correct me if there is anything wrong, thank you!
The selection of the cutter, the angle of installation and the gap all have an impact, as well as the impact of temperature during the production process, as well as the stability of the temperature, pressure and flow rate of the heating steam. In short: Equipment installation must be accurate and process control must be smooth! This is also the essence of all product control!