Spraying of two-stage paint
，并进行除锈、喷涂中间涂料，以便打磨后喷涂面漆。 The coating of the second process is the same as that of the plain paint. The damaged part is ground obliquely, the , and the rust is and the intermediate paint is sprayed to spray the top paint after sanding.①The spraying of two-step thermal acrylic topcoat mainly includes spraying of colored paint and spraying of varnish.
Spraying of base paint:
，喷涂增粘剂到整个打磨过的表面上，干燥30~60min。 First, use a cleaning solvent to clean the entire polished surface. In strict accordance with theproduct manual, spray the tackifier onto the entire polished surface and dry it for 30-60 minutes. Prepare the spray gun according to the requirements of the manual, and install the thermoplastic acrylic base paint in the spray cup, and spray the base paint according to the same requirements as the plain paint. In the construction, it should be noted that the base paint must not be sanded. If it is not possible to sand, the base paint must be completely dry before using wet sanding with ultra-fine sandpaper, and care must be taken during operation.
粘度合格 后将其装入喷杯中，做好记号“清漆”。 When spraying the thermoplastic acrylic varnish, first dilute it according to the instructions, fill it into the spray cup after viscosity, and make a mark "varnish". “消雾圈涂料”。 Prepare antifogging ring coating, put it in another spray gun, and mark "antifogging ring coating". Adjust the spray gun pressure to 0.25 ~ 0.28MPa, spray 2-3 layers of medium humidity coating with varnish, and the interval time of each layer is 15 ~ 20min. In the agent area, spray the anti-fog ring coating to the polishing area of the varnish. Under the pressure of 0.14 MPa, spray the anti-fog ring coating on the entire varnished surface). It should be dried for more than 24 hours before polishing until the varnish is completely dry, and then polished with a polishing machine.
Acrylic polyurethane varnish
，喷涂后不需要抛光就能得到良好的光择和鲜映性。 It is the best varnishfor undercoating. It does not need polishing after spraying to get good light selection and freshness. Before spraying the varnish, the hot-paint plastic acrylic topcoat is allowed to dry for more than 2h (if necessary, the acrylic topcoat can be slightly polished before spraying the varnish), and then it can be overcoated with acrylic polyurethane varnish. Acrylic polyurethane varnish is a two-component paint. The ratio of curing agent to curing agent must be very accurate. The spray pressure is generally 0.35MPa. 2-3 layers of medium-mix coating are sprayed in the area to be repaired, with each layer interval of 15-20min. For example, in the summer, a retarder of about 50 g / L can be added to the prepared polyurethane mixture to improve its fluidity. At this time, the drying time must be appropriately extended, preferably at least 24h (if necessary, touch-up processing should be performed; if there are defects or dust on the surface, the varnish can be dried for 48h before being polished).
Repair of acrylic polyurethane varnish
First clean the surface with a cleaning solvent, process the repaired surface, apply a primer after doing the frosting, and spray the thermoplastic acrylic basecoat to full coverage. 出喷漆间之前干燥数小时。 Dry for more than 2h, spray acrylic polyurethane varnish according to the instructions, dry for 12h, or dry for several hours before pushing the out of the spray booth.
Due to the poor adhesion of the coating film on the surface of the coated object or the undercoating layer, scraping the coating film with nails or metal will cause the phenomenon of coating film peeling, which is called peeling. Car paint is easy to peel off ...