Foamed polyurethane spraying construction process for cold storage insulation
1. Construction preparation.
Before construction, it is necessary to make adequate preparations. First of all, it is necessary to choose the right construction team and materials, including foamed polyurethane, spraying equipment, etc. Secondly, it is necessary to ensure that the construction environment is clean and dry, free of debris and dust. Finally, technical training and safety education should be carried out for construction personnel to ensure that they are familiar with construction technology and operating procedures.
Second, grassroots treatment.
Before spraying, the base layer needs to be treated to remove dirt, oil stains and impurities from the surface, and check whether the base layer is flat, dry, free of cracks and other defects. For uneven substrates, filling and sanding are required to ensure the adhesion of the spray coating to the substrate.
3. Spraying construction.
Spraying is the core of the whole process. When spraying, you need to pay attention to the following:
1.Adjust the pressure and discharge volume of the spraying equipment to ensure that the thickness and uniformity of the spraying coating meet the design requirements.
2.Mix the foamed polyurethane in groups A and B according to the specified proportion, and stir well.
3.Preheat the base surface to be sprayed to improve adhesion and reduce shrinkage of the spray coat.
4.When spraying, it is necessary to control the distance and angle between the spray gun and the surface of the base layer, and move the spray gun evenly to avoid uneven spraying and sagging.
5.In the spraying process, it is necessary to check the thickness and uniformity of the spraying coating at any time, and adjust the number of sprays in time to ensure the quality of construction.
Fourth, post-processing.
After the spraying is complete, the surface needs to be treated. First of all, it is necessary to check for uneven spraying and sagging, and repair it is carried out. Secondly, for parts with unsmooth surfaces, sanding and trimming are required. Finally, depending on the need, decorative treatments can be carried out on the surface, such as painting, tiling, etc.
5. PrecautionsDuring the construction process, the following points need to be noted: 1Construction workers need to wear personal protective equipment such as protective clothing, gloves, and masks to avoid contact with chemicals. 2.The construction site needs to maintain good ventilation and lighting conditions, and avoid construction in high temperature and high humidity environments. 3.During the construction process, it is necessary to comply with relevant safety regulations and operating procedures to avoid safety accidents. 4.For the finished coating, it needs to be protected from contamination and damage. Cold storage insulation