The quality of molded FRP products, in addition to the overall technical quality of the factory workers, the most important is the quality and service life of the mold. The domestically produced FRP molds are structurally good. Compared with other industrialized countries, the quality of FRP products molded by FRP mold surface treatment technology is not only the quality of the overall technical quality of factory workers, but also the most important. Mold quality and service life. The domestically produced FRP molds are structurally good and can be compared with other industrialized countries. However, the surface quality of FRP molds is generally poor. In addition to domestic mold resins and tooling equipment defects, most domestic manufacturers. There is no foreign factory that pays attention to the processing of the master mold and the surface finish of the mold.
The finish of FRP products depends on the smoothness of FRP molds. Therefore, the FRP products at home and abroad are fine and refined on the surface of FRP molds. FRP molds are the mother of products, and more efforts are made on FRP molds in the future. Get better results on it. The surface treatment technology of FRP mold is introduced as follows.
New mold and old mold renovation 1. Water mill--new mold or old mold renovation, first water sandpaper water grinding, water sanding water sandpaper starting point is high, generally starting from 600, some users to improve work efficiency, from 400 or even 400 The thicker water sandpaper starts, for the sake of the moment, it is not known that the fine sandpaper caused by the coarse sandpaper can not be ground after grinding. After the 600th, it should be 800, 1000, 1200, 1500 ( Even 2000, step by step, one can not save, but also to work hard, be willing to make great efforts, spend a lot of effort, not to be speculative.
2, polishing - first apply a proper amount of coarse polishing agent on the surface of the mold, and polish it with an electric polishing machine. When polishing, the wool disk is placed flat on the surface of the mold, and the polishing machine is turned into a circular spiral operation, and the pieces are thrown over. Don't miss the throw, the main workload is rough, so the general rough throw will be at least two times until the mold is smooth. After the rough polishing is finished, replace it with a new wool disk, and then finely throw it with a fine polishing agent. Repeat the above operation. The thickness polishing agent cannot be used in the same way as a wool disk. It is best to use a polishing machine.
3, clean mold - clean mold process is to remove the polishing agent residue or oil on the surface of the mold, so that the subsequent sealing agent and release agent (wax) can be firmly attached to the mold, clean Generally, wipe the mold water twice, first wipe the mold water with gauze on the surface of the mold and then dry it, then apply a layer of clean mold water, let it fully evaporate (about half an hour), then wipe it with a clean dry cloth. .
4, sealing mold - for glass fiber reinforced plastic products requiring medium finish, generally polished with No. 3 polishing agent can be. However, after the surface of the mold is only polished, there are still many fine holes that are invisible to the naked eye. Therefore, for the FRP products requiring high precision, these fine holes must be sealed off, so that the accuracy of the FRP products is upgraded to a higher level. The specific method is to uniformly seal the sealing agent with gauze on the mold surface, let it dry (about 30-60 minutes), and then wipe it to bright with a clean dry cloth. If it is a new mold, it should be sealed four times. If it is a new mold, it can be sealed twice.
5, demoulding - according to the thickness of the production of FRP products, choose different release agents. For cast-formed FRP sanitary ware or thicker FRP products with a thickness of about 5 mm, the high heat-releasing wax is used because the FRP solidification heat is relatively large. The specific release wax is preferably wrapped with gauze and wrapped in a proper amount of release wax and then evenly coated on the surface of the mold, so that it is uniform and economical, so that the release wax is not scattered, and it is dry (30- 60 minutes), then clean the gauze with a hand or polish the machine to a bright light. The new mold can be used 4 to 5 times before the mold release wax. After the first product is demolded, the mold release wax can be removed once each time.
In order to improve the product smoothness and improve work efficiency, the release agent should be applied once every time, so that the product has high finish and avoids the need to clean the wax after using the release wax multiple times.
After a period of production, mold surface renovation
The mold release wax has been oxidized after repeated use of mold release wax or long-term storage mold. When the glass fiber reinforced plastic product is produced, the surface roughness of the product is affected by the wax accumulation. At this time, it is necessary to renovate and renovate, and all the wax can be cleaned twice by the cleaning agent. Wash it all off, seal it twice with a sealing agent, and then remove the wax three times. The mold is completely new and can be used again.
Http://news.chinawj.com.cn Editor: (Hardware Business Network Information Center) http://news.chinawj.com.cn
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