How to clean a polyurethane spray machine after use?


Release Date:

Mar 01,2020

The polyurethane spraying machine is a key piece of equipment in aerated concrete production, used to mix the raw materials uniformly, ensure thorough reaction, and promptly inject the resulting slurry into the molds. To maintain the product’s performance and ensure proper operation, routine cleaning and maintenance are essential. Here are several key points regarding the correct use of the equipment and effective cleaning techniques.

      Polyurethane spray machine It is the primary equipment in aerated concrete production, used to mix raw materials uniformly, ensure thorough reaction, and promptly pour the resulting slurry into molds. To maintain the product’s performance and ensure proper operation, routine cleaning and maintenance are essential. Here are several key points regarding the correct use of the equipment and effective cleaning techniques.

 

      Polyurethane spray machine Both low-pressure and high-pressure machines are used for two-component polyurethane systems. The high-pressure machine relies on high pressure to atomize the two components, which are then mixed at high pressure in the mixing chamber; therefore, it does not require cleaning after use. In contrast, the low-pressure machine uses an electric motor to drive a high-speed agitator for mixing, and it must be cleaned with MC or another suitable solvent after each operation.

 

Due to Polyurethane spray machine This is a high-pressure device; be sure to carefully read the precautions and warning labels in the instruction manual before operation. After completing the spraying task, first depressurize the system and allow any remaining coating material to drain from the return line to prevent degradation or crystallization of the formulation. Also, ensure proper maintenance of the heating elements.

 

After use, clean it with a detergent. Polyurethane spray machine The material‑feeding pump should be thoroughly cleaned and then stored in a protective sleeve containing the host‑machine cleaning agent. Please note that industrial alcohol can cause the internal seals to become gummy; therefore, do not use industrial alcohol for cleaning the equipment. Additionally, if the interval between the two most recent uses exceeds 30 days, the entire unit must undergo a full‑machine cleaning and resealing.

 

For compact, user‑friendly foam machines, during periods of inactivity, perform a 30‑minute high‑low pressure cycle every 1–2 days. Verify that the circulating cleaning fluid in the polyurethane spray machine’s proportioning cylinder is flowing properly and check for cloudiness or crystallization; replace the fluid promptly if any issues are detected. For equipment that will remain idle for an extended period, flush out the process fluids with DOP or a suitable substitute.