Retrofits in banks for moulding hollow bodies of plastic material by blowing type oscillating

摘要

1,267,531. Blow-moulding. LESIEURCOTELLE S.A. 17 March, 1969 [18 March, 1968], No. 13887/69. Heading B5A. In a blow-moulding machine, the mould carrier assembly is carried on and rigid with a shaft trunnioned on a fixed frame structure and coupled to a reciprocating motion drive for rotary oscillating movement about its longitudinal axis for moving the carrier between a first, mould loading position and a second, mould discharge position and the shaft is also coupled to a manual drive through reduction gearing to move the shaft to a third, mould replacement position. As shown in Fig. 1, mould assembly 10 oscillates about rotary shaft 5 between position 10a in which it receives a tubular extrudate from extruder 1 and position 10b in which the mould article is ejected. This motion is effected by cylinder 13 mounted on frame 2 at 14, piston-rod 15 being connected to shaft 5 through a coupling 17 carried by the outer end of arm 18 rigid with the shaft. The mould assembly is also movable to position 10c for replacement of moulds by means of wheel 19 on shaft 5 engaging worm 21 which is connected to frame 2 at 22, 23 and has a stub shaft extension 24, the square-sectioned end 24a of which is engaged by manual drive means, e.g. a handwheel. Two mould assemblies 10 may be used if desired, the mould(s) of one being replaced independently of the other.