![]() Speeds of up to 1,750 rpm are preferred for small drill holes and for larger holes, whereas speeds as low as 350 rpm are advised. There must be a separation between the edge and the hole of at least twice the hold diameter. The hole must be larger than the screw to allow for thermal dilation and contraction. During the drilling operation, the sheet must be firmly held, but avoiding excessive pressure at the same time. It is occasionally possible to use ordinary drill bits, but they should be sharpened to reduce the depth or cutting angle. Drill bits designed for use with plastics are recommended. PC sheets can be drilled quite easily with a normal stand drill or even with a hand-drill using clean, sharp drill bits. The sheet edges can be buffed using buffing paste, first with a rigid fabric disc and then with a soft cloth to produce the final finish. To prevent the plastic from cracking or melting, the blade must be very sharp and the guide should very close to the cut to prevent vibration. The best results are obtained using teeth without any inclination and also somewhat jumped. It is recommended to employ a band saw with separated teeth because the empty space will facilitate the exit of the cut chips. Disc or band saws produce the best edges and can perform almost all cutting operations.īlade shape plays an important role in sawing plastics. The common types of saws employed in wood or metal carpentry provide good results when sawing PC sheets: disc, band, sabre, jigsaw, hewing and handsaw. The sheets should be cleaned with a solution of warm water with a little neutral soap and rinsed with water employing a very soft sponge or chamois leather.However, the actual material itself possesses a certain resistance to outside weather so that it can be used in exterior applications in locations where sunlight is of low intensity and does not permanently fall on the sheets. When used in exterior applications, the protective film must be removed immediately, since exposure to sunlight can cause permanent adhesion to the sheet. ![]() PC sheets are not protected against sunlight.They can be milled with conventional milling machines. PC sheets can be sawn, edged and drilled without any burring. ![]()
0 Comments
Leave a Reply. |
AuthorWrite something about yourself. No need to be fancy, just an overview. ArchivesCategories |