多个凸台形体头盔外壳成型钻模的设计与制造

Design and Manufacture of a Plurality of Convex Shaped Helmet Shell Molding Mold

对于具有多个凸台形体头盔外壳成型模的结构,为了避免出现聚胶、脱胶和气泡等缺陷,成型模必须在具有凸台形体处采取刚性压块的结构。这样,通过橡胶袋充入的压缩空气作用于刚性压块,刚性压块又将压力传递给头盔外壳壁。利用刚性压块与成型模型腔之间的均匀间隙,可将壁中空气和多余粘接剂通过钻套孔排出模腔,以达到无聚胶、无脱胶和无气泡等壁厚的头盔外壳。为了避免壁厚出现皱褶缺陷,可将玻璃布剪开成若干条缝,以实现玻璃布搭接的形式而成型橄榄球形状。实践已经证明这种模具结构和裱糊的方法,是能够成型合格的头盔外壳。

For having a plurality of convex shaped helmet shell molding structure, in order to avoid the emergence of adhesive poly, degumming and bubbles and other defects, molding mold must have convex shaped parts adopt the rigid structure of the pressing block. In this way, through the rubber bag filled with compressed air pressure acting on a rigid block, rigid pressing block and will transfer the pressure to the helmet shell wall. The use of rigid pressing block with the clearance between molding cavity evenly, can be wall air and excess adhesive through drills the set outlet cavity, in order to achieve no adhesive poly, no degumming and no bubble helmet shell wall thickness. In order to avoid the wall thickness appear wrinkle defects, glass cloth can be cut into a plurality of joints, in order to realize the glass cloth lap form rugby shape molding. Practice has proved that this method of mold structure and paper, is capable of the helmet shell qualified molding.