Daily Maintenance & Management of Spinning Box & Its Components

1) The spinning box can only be maintained when the nonwoven line is not running. It is important to regularly check its fixing and hanging mechanisms. Additionally, any carbon deposits, loose filaments, and debris on the box must be cleaned to reduce fire hazards.

2) The spinning box that is being heated for the first time must undergo thermal tightening. This process requires tightening at various temperature stages based on the specifications of the bolts used, including their diameter and strength grade. It's important to follow the prescribed torque, the number of tightening cycles, and the correct sequence. Given the high torque involved, a torque wrench must be utilized.

3) Open the insulation cover of the spinning box regularly to inspect and maintain the heating tubes, sensors, and cable connectors. It is important to verify the functioning status of every heating tube by measuring the load current for each of them. Additionally, the sealing should be checked regularly to prevent any potential melt leakage.

4) During operation of the spinning box, no maintenance work should be performed on the heating system. In particular, the temperature sensor must not be unplugged to prevent overheating or potential fire hazards.

5) Before installing the spinning components, ensure that all residual melt in the system has been completely drained. Thoroughly clean the joint surface between the box and the components, as well as any residual melt and carbide in the melt channel. It is important to keep all threaded holes intact; if any are damaged, they must be repaired by using taps.

6) The bolts used in the spinning components, as well as those used for its installation, are all specially-designed high-strength bolts. Before installation, a thin layer of anti-adhesive or high-temperature grease (such as molybdenum disulfide) should be applied to the threaded components.

7) Installation work should by carried out by utilizing specialized tools for component transport and installation.

8) Component installation can be performed at room temperature or in a preheated state. Installing components while preheated can significantly reduce the waiting time for heating. Based on the ambient temperature and technical requirements, the preheating temperature should be several degrees higher than the normal processing temperature.

9) When installing the spinning components, use a manual torque wrench and tighten the components multiple times in the specified order and to the recommended torque. Typically, you should tighten the components at least three times, with intervals of 30 to 60 minutes between each tightening. The tightening torques should be 60%, 80%, and 100% of the rated torque, respectively.

10) When you insert the bolts into the threaded holes of the box for the first time, they should be easy to screw in by hand. Manually tightening the bolts ensures proper heating and expansion of the components. When tightening, start from the center and work outwards symmetrically and crosswise towards both sides, as well as upstream and downstream.

11) It is not recommended to use electric or pneumatic wrenches for installing the spinning components. All bolts should be tightened according to the specified requirements. Using a sleeve to increase torque is not permitted, as it may lead to bolt breakage and falling during operation. This could potentially damage the web former, thermal calender, and other equipment.

12) Once the components are installed, the site should be cleaned. After achieving the designated temperature, a temperature equilibrium period of approximately one hour must be allowed before starting the melt metering pump.

13) If the monomer exhaust system is not connected to the spinning pump, it should be started promptly and operated at a low speed after the spinning pump is activated.

14) When scraping the spinnerets, it is crucial to ensure personal safety, wear appropriate clothing, and use qualified protective equipment. Additionally, it is important to properly shield and protect the entrance of the drafting channel.

15) When scraping the spinneret, the spinning pump should be operated at a low speed (≤20% rated speed), the scraping should be performed in the same direction, and steel scraper should not be used. When using atomized silicone oil, there should be no open flames or sparks around.

16) Handheld lighting equipment must adhere to safety and electrical regulations.

17) Once the spinning pump is running at normal speed and all spinneret holes are functioning properly, the production process can then be initiated. The suction fan should start at a low speed firstly, allowing for the spinning or filament drafting operation to start.

18) Start the lateral quenching device and close the cooling chamber according to the spinning and drawing processes.

19) Make sure to thoroughly clean up all tools, supplies, waste filaments, and garbage left on-site.