一、普通胶合板的可冲性 普通胶合板是用薄木板按奇数层对称纵横纹交叉排列、用酚醛树脂或尿醛树脂等胶合剂粘结压合而成。它提高了木材的力学性能,特别是提高了横放抗拉强度,它比普通薄木板有更好的冲压加工性。我厂生产的几种收音机机壳,使用了3毫米和6毫米厚的普通胶合板材料,其中有护板喇叭板、后盖板等零件要分别冲制长方孔、半圆孔,要求孔壁平整、边缘不开裂、无毛刺。通常,当 First, the normal red plywood can be washed Ordinary plywood is thin layers of odd and even layers of symmetrical vertical and horizontal crosswise arrangement, with phenolic resin or urea-formaldehyde resin adhesive bonded together. It improves the mechanical properties of the wood, especially the transverse tensile strength, which is more press-machinable than normal veneer. I produced several radio chassis, the use of 3 mm and 6 mm thick ordinary plywood, including a horn plate, rear cover and other parts to be punched rectangular holes, semi-circular hole, the required hole wall formation , The edge is not cracking, no burr. Usually, when