Method for making, by blow moulding, plastic hollow bodies, device and installation therefor

摘要

To blow plastic hollow bodies, each mold (7) has its respective compression chamber (21) connected to it, constituted by a cylinder (20)-piston (19) assembly; pressure is initialized in the chamber; the fluid is compressed in the chamber; the chamber is connected (22, 24, 25) with the blank (9) when the piston position attains a predetermined position and chamber volume continues to be reduced to complete the blowing. The invention can be applied in particular to the blowing of small-volume hollow bodies.