Inorganic fiber spraying operation matters introduction:
1. Appearance quality inspection of raw materials
Before construction, the sprayed fiber cotton and adhesive should be sampled for inspection. The fiber cotton should be dry and free of caking, white and dirt, and the adhesive should be free of delamination, foaming, deterioration and discoloration;
2. Spraying base surface treatment
(1), spraying base surface treatment: with compressed air or clean water spray base surface dust and dirt; check whether the hanging parts and embedded parts are firm, should be loose parts fastening, such as the original base surface has been damaged or have serious cracks, should be repaired first.
(2), the doors and windows and various equipment, pipelines and non-spraying parts of the protective block, blocking fee spraying parts and ventilation pipeline through hole.
(3) Clean up the obstacles on the working surface, ensure the smooth movement space and safety of the spraying hand, and maintain the best spraying distance and spraying angle.
3. Material preparation and debugging
(1) Sup the compressed fiber cotton, continuously fill the sprayed cotton into the spraying machine, and keep the fiber material in the material box sufficient. (2) A special person shall be responsible for diluting the adhesive stock solution with clean water in a professional matching container (a 200-liter graduated plastic container equipped with a high-speed stirrer) according to the instructions for spraying the adhesive. The preparation ratio shall be strictly controlled, and the water dilution shall not be increased at will. The electric stirrer shall be continuously started for uniform stirring. The stirring time shall not be less than 5 minutes. Each barrel shall be prepared one by one, and prepared as required to avoid freezing and failure.
4. Pre-spraying primer on the surface of the base layer: after the surface of the base layer is cleaned, the prepared spraying adhesive can be used to pre-spray glue on the base surface. The glue amount is appropriate and uniform without flowing.
5, fiber spraying (1), spraying equipment debugging, should be strictly in accordance with the equipment operation instructions to adjust the spraying host wind pressure, glue pump pressure and feeding device, through the sample test spray, glue flow and cotton volume measurement, gradually adjust the wind pressure range and feed stirring speed, until the fiber spraying state is stable, to meet the requirements of the spraying process.
(2) Check and verify with the drawings, determine the fiber spraying parts, and mark the non-spraying parts and provide necessary protection.
(3) Place the thickness scale (marking block) in different areas, and then spray it. The spraying angle shall be in accordance with the technical requirements in order to obtain large compaction force and minimum springback. For spraying thickness less than 100mm thick spray coating can be completed in one spray.
(4) Surface shaping of spraying layer: after the surface of the sprayed product is dried for about half an hour, different shaping tools such as wool roller, aluminum roller, pressure plate or aluminum alloy bar ruler are used for surface shaping according to the different requirements of heat preservation or sound absorption engineering. (5) Spray adhesive surface coating again on the surface of the product after shaping to enhance the surface strength. If the design requires surface coloring, the color paste can be sprayed after the surface coating is completed.
(6) The construction site after spraying shall be cleaned up in time, the rebound material shall be removed from the site, and the spraying protection shall be removed.
