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Preparation Before FRP Production

Jun 13, 2020

Preparations before production of FRP 1. Labor protection In the production of FRP, because the chemical materials used in FRP are somewhat toxic, some materials (such as styrene) and organic solvents (such as acetone) are highly volatile; in addition, The dust and glass fibers and fillers generated by the cutting and grinding of FRP, the safety protection of mechanical equipment and electrical equipment must be fully paid attention to when organizing the production of FRP. Before putting into normal work, you must wear personal protective equipment in strict accordance with safety regulations, and make necessary tests on mechanical equipment to ensure that it can be safely put into use. Any equipment with hidden safety hazards is prohibited. 2. Preparation of production tools    In order to make hand lay-up work smoothly and ensure product quality, some tools need to be prepared before production. Commonly used tools are brushes, scrapers, ingredients spoons, wool rollers, rubber rollers, scissors, hammers, wedges, etc., ingredients preparation electronic scales, measuring cylinders, etc., cutting there are sanding machines, drilling machines, trimming machines, etc. 3. Reinforcement material preparation   Reinforcement materials should be selected in advance according to the technical requirements. The type and thickness of the chopped mat and glass fiber cloth used should be strictly checked before pasting, so as to avoid unnecessary trouble and loss caused by wrong use.   1. Cloth cutting table: The cutting of reinforced materials requires a cloth cutting table with an appropriate area. Place the felt on the table to measure the size.   2. Cloth cutting tools: ruler, scissors and cloth cutting knife.   3. Check: Before cutting the cloth, check whether the specifications and thickness of the raw materials meet the requirements; observe whether the surface has oil stains, debris, unevenness, etc.; if it absorbs moisture, it needs to be dried before use.   4. Cutting: Cut the glass fiber cloth and felt according to the size specified in the process document. If you don’t know it, please consult the foreman in time to avoid waste caused by cutting errors.   5. Marking: Felt and cloth with different material numbers and different specifications should be placed separately, and the labels should be well marked to avoid confusion during pasting and affect product quality and efficiency. 4. Preparation of glue solution (matrix resin/gel coat resin)   Each time the amount of glue solution (gel coat and matrix resin) is configured, the glue solution is considered based on the amount of glue used, the speed of paste, and the curing speed; after adding the curing agent, it is necessary to fully Stir evenly, the dosage of curing agent and accelerator should be strictly controlled within the specified range, and they cannot be added arbitrarily (Note: direct mixing of accelerator and curing agent is strictly prohibited, to avoid explosion, fire and other accidents caused by violent reaction), such as in glue If filler is added, frequent stirring is needed to avoid filler precipitation. Fifth, mold preparation 1. Mold repair: The most commonly used hand lay-up process is FRP molds, place the processed molds on the production site, and use tools such as compressed air, soft cloth, brush to clean the surface of the mold when necessary Work on the surface of the mold and check the quality of the surface of the mold before pasting. If it is damaged, it needs to be repaired immediately. If it cannot be repaired or there are still problems after the repair, apply for scrapping (Note: The technical requirements for mold repair are high and need to It is carried out by a special person, please do not repair it at will). 2. Cleaning of the mold: carefully remove the residual glue left on the mold after demoulding (be careful not to damage the surface of the mold), then clean it with acetone and apply a mold release agent (if the mold can be demolded normally in production, it is not necessary Use a release agent), and dry to use.

Source:http://www.up-resin.com/

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