How to Professionally Clean and Maintain a Polyurethane Spray Machine—Airless Sprayers, Waterproof Coating Sprayers
Release Date:
Aug 07,2020
Polyurethane spray machines are key equipment in aerated concrete production, used to mix raw materials uniformly, ensure complete chemical reactions, and promptly inject the prepared slurry into molds. To maintain product performance and ensure proper operation, regular cleaning and maintenance are essential tasks. Jiangsu Chengye Tools Co., Ltd. specializes in airless sprayers, polyurethane spray machines, and waterproof coating sprayers. Here are a few summarized tips on proper usage and cleaning techniques—let’s take a look. How to clean a polyurethane spray machine after use. Low-pressure and high-pressure polyurethane spray machines are used for two-component polyurethane systems, with the high-pressure unit delivering…
Polyurethane spray machines are key equipment in aerated concrete production, used to mix raw materials uniformly, ensure complete chemical reactions, and promptly inject the prepared slurry into molds. To maintain product quality and ensure proper operation, regular cleaning and maintenance are essential procedures. Jiangsu Chengye Tools Co., Ltd. specializes in airless spray machines. Polyurethane spray machines and waterproof coating spray machines. Here are a few key tips on proper usage and cleaning—let’s take a look.
How to clean a polyurethane spray machine after use.
Low-pressure and high-pressure polyurethane spray machines are used for two-component polyurethanes. The high-pressure machine atomizes both components and mixes them at high pressure in a mixing chamber; therefore, the high-pressure unit requires no cleaning after use. In contrast, the low-pressure unit relies on a motor-driven high-speed agitator to blend the materials, and it must be cleaned with methyl cellulose or other solvents following operation.
Since polyurethane spray machines are high-pressure equipment, operators must carefully read the precautions and warning labels in the manual. First, after completing spraying, depressurize the system and allow any remaining paint to drain through the return line to prevent the material from deteriorating and crystallizing. After use, maintain the heating elements by cleaning the surface of the polyurethane sprayer’s lift pump with a detergent, then place it in a protective case containing host‑machine cleaning agent and seal it tightly. It should be noted that industrial alcohol can cause the internal sealing gel to harden, so do not use it to clean the equipment. Additionally, if the interval between two consecutive uses exceeds 30 At the appropriate time, the entire machine must be cleaned and sealed.
During the downtime, regular checks should be performed. 30 During the high‑ and low‑pressure cycling for several minutes, check whether the circulating cleaning fluid in the polyurethane sprayer’s proportioning cylinder is flowing properly and whether the fluid has become cloudy or crystallized. If any issues are detected, replace it promptly. Materials that have not been used for an extended period should be replaced with… DOP 。
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