Abstract
Long glass fiber mat reinforced polypropylene resin sheet is one type of stampable sheets. The stampable sheet is easily formed into a part, but it has some problems in the processing. So, in this report, the effects of molding conditions on the moldability were investigated. That is to say, the effect of the heating temperature, the heating time, the mold temperature and the charge pattern on the strength and the surface roughness were investigated in details, when the cupped parts were molded. The main results obtained are as follows: 1) The most suitable heating conditions of the stampable sheet blank are 230°C and 5 min. 2) The part made from 4 pieces of ply has the highest strength. 3) In the case of the mold temperature below 100°C, the higher the mold temperature is, the better the surface rouhness of part is. 4) The part under the mold temperature 150°C had the highest strength.
