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Automotive carbon fiber interior and exterior trim production process
Cutting: Take out the carbon fiber prepreg from the material freezer, use the tools to cut the carbon fiber prepreg and fiber as required.
Layering: Apply release agent to the mold to prevent the blank from sticking to the mold, and then layer the cut carbon fiber prepreg and fiber in the mold, followed by vacuuming and sending it to the hot press tank.
Forming: Start the hot pressing tank, electric heating to 150°C, curing for 3 hours, remove the mold, natural cooling for 10 minutes to room temperature, remove the mold to obtain molded blanks.
Trimming: Receive the molding blanks, use scissors, knife and other tools to remove the raw edges of the molding blanks manually, and some of the products need to be refined on the CNC machine.
Sanding: sandblasting sanding to improve the efficiency of spraying, need to rough the surface of the molded carbon fiber material, the use of closed sandblasting machine using iron sand impact on the surface of the carbon fiber, to increase its coarseness, in order to meet the needs of the next step of spraying.
Filling: The semi-finished products with qualified surface after sand blasting are directly delivered to the next production process; semi-finished products with large sand holes on the surface need to be manually filled with resin (mainly composed of epoxy resin and dicyandiamide) to make the surface smooth, and then delivered to the next production process after the resin is fully cured at room temperature (it takes 4~5 hours).
Paint mixing, spraying, drying, drying: before spraying, the paint needs to be mixed, the mixing ratio is varnish: hardener = 2:1 (weight ratio), water-based paint: water = 1:1 (volume ratio). In the paint booth according to the standard spray paint (spray wet film thickness of 75μm, play a role in increasing the brightness and transparency of the product); after the completion of the spray paint operation, the cart will be sent to the drying room to be cooled and dried to the surface drying (at least 30 minutes); surface drying after the removal of the hanging device, the product will be sent to the drying room, the use of electric drying, drying at 80 degrees Celsius temperature for 2 hours.
Product beauty: product beauty is the product spraying quality inspection, mainly using the naked eye observation, found that the product spraying surface has a dust spot and other defects, the need for its surface sanding and polishing, sanding for dry sanding and wet sanding.
Dry sanding: the use of sanding and polishing machine on the product pinhole, fine sanding to a smooth surface.
Wet sanding: In the sanding table, through the side of the water spraying and grinding, the product surface will be fine bumps for grinding.