How to install and disassemble the spinning components of meltblown nonwovens production correctly? What is the specific method

Since the production process of meltblown nonwovens is significantly different from the production process of spunbonded nonwovens, the installation and disassembly of spunbonded and meltblown spinning components also vary with the spinning process. The spunbond components have been assembled into a whole before being installed in the spinning box, switchboard, spinneret and filter, which belongs to the entire installation and disassembly. Melt blown components can be divided into two types according to different structural forms, so installation and disassembly can also be divided into two types according to structural forms. 1. Replacement method of integral melt jet spinning assembly The integrated melt jet spinning assembly is composed of melt distribution plate, filter screen, spinneret and air knife, etc., which can be disassembled and adjusted before installation. The installation process is simple and the time is short. If the preheating process is used at the same time, the efficiency is higher. 2. Replacement method of split meltblown spinning assembly. In the process of replacing split meltblown spinning assembly, various components in the assembly, such as filters, spinnerets, air knives, etc., are installed one by one in the spinning On the yarn box. Continue to test the matching relationship between the components during the installation process, and perform a comprehensive inspection and adjustment again after the initial assembly (mainly the airway gap and both sides of the cone), after reaching the working temperature (or running after a period of time) Even tighten and fine-tune again or hotter until the technical requirements are met. After the spinning assembly is installed on the spinning box, it is necessary to use the ventilation air flow and the heat of the box to heat the assembly, which requires a long heating and equilibration time to be put into operation. If the equilibration time is insufficient, the spinneret will start and run before the tip of the spinneret reaches operating temperature. Due to the high flow resistance of the melt, high pressures are easily generated in the parts and boxes, which may cause cracks and damage to the spinneret (the same potential hazards exist for the whole part). The components of the melt jet spinning assembly are precision and complex mechanical parts, so they must be installed very carefully. Although the installation of the split assembly will take more time, the smaller size and weight of the spinning assembly of this form can generally be done using small special tools or manual operations. In addition, because the matching relationship between the parts is not fixed, it can also be optimized and adjusted according to the production process requirements or product quality (mainly the width of the air passage on both sides), which has a certain degree of flexibility.