Injection and blowing machine for manufacturing hollow bodies of plastics material
First Claim
1. A machine for continuously manufacturing hollow bodies by injection and blowing of material, comprising in combination, a rotary polygonal-sided turret rotating in a step-by-step manner about an axis, a plurality of turret stations arranged around said axis of the turret and comprising an injection station injecting said material in the form of blanks, a blowing station having means axially stretching and then blowing said material into biaxially oriented hollow bodies, and intermediate stations between said injection station and said blowing station, said intermediate stations including a transfer station, an oven structure having means operable to heat the material to biaxial orientation temperature and being disposed adjacent said transfer station and having a plurality of oven stations moving in step-by-step manner in a closed circuit, a plurality of sets of support members carrying said material in various stages of manufacture of said hollow bodies, each of the sides of the turret receiving a respective one of said sets of support members, each of said oven stations receiving a respective one of said sets of support members, means removably and independently fixing said sets of support members respectively to said turret sides and to said oven stations, the step-by-step rotation of the turret moving each set of support members carried by the turret sides to each one of said turret stations, the step-by-step movement of said oven stations moving each set of support members carried by the oven structure step-by-step in starting at said transfer station and eventually ending at said transfer station, and means transferring the sets of support members at said transfer station from said turret to said oven structure and subsequently from said oven structure to said turret.
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Accused Products
Abstract
Machine for injecting and blowing a plastics material into hollow bodies. It comprises a rotary polygonal-sided turret which carries on each side a set of support members for the plastics material which are made to pass step-by-step to an injection station for injection of a blank and a blowing station for blowing the material into a hollow body in passing through intermediate stations including a transfer station. A rotatable oven structure having sockets rotatable step-by-step about an axis of the oven structure is located adjacent the transfer station for transferring the sets from the turret to the oven structure and, after a complete rotation about the oven structure axis, transferring the sets from the oven structure to the turret. Each turret side and each socket of the oven structure receives a respective one of the sets which is fixed to the turret or oven structure in a removable manner to allow the mentioned transfer. Heating means in the oven structure heat the material supported by the support members, during the rotation of the sockets, for the purpose of subsequently completing a bi-axial drawing of the plastics material at the blowing station.
46 Citations
26 Claims
- 1. A machine for continuously manufacturing hollow bodies by injection and blowing of material, comprising in combination, a rotary polygonal-sided turret rotating in a step-by-step manner about an axis, a plurality of turret stations arranged around said axis of the turret and comprising an injection station injecting said material in the form of blanks, a blowing station having means axially stretching and then blowing said material into biaxially oriented hollow bodies, and intermediate stations between said injection station and said blowing station, said intermediate stations including a transfer station, an oven structure having means operable to heat the material to biaxial orientation temperature and being disposed adjacent said transfer station and having a plurality of oven stations moving in step-by-step manner in a closed circuit, a plurality of sets of support members carrying said material in various stages of manufacture of said hollow bodies, each of the sides of the turret receiving a respective one of said sets of support members, each of said oven stations receiving a respective one of said sets of support members, means removably and independently fixing said sets of support members respectively to said turret sides and to said oven stations, the step-by-step rotation of the turret moving each set of support members carried by the turret sides to each one of said turret stations, the step-by-step movement of said oven stations moving each set of support members carried by the oven structure step-by-step in starting at said transfer station and eventually ending at said transfer station, and means transferring the sets of support members at said transfer station from said turret to said oven structure and subsequently from said oven structure to said turret.
- 15. A machine for continuously manufacturing hollow bodies by injection and blowing of material, comprising in combination, a rotary polygonal-sided turret rotating in a step-by-step manner about a vertical axis, a plurality of turret stations arranged around said vertical axis of the turret and comprising an injection station injecting said material in the form of blanks, a blowing station having means axially stretching and then blowing said material into biaxially oriented hollow bodies, and intermediate stations between said injection station and said blowing station, said intermediate stations including a transfer station, an oven structure having means operable to heat the material to biaxial orientation temperature and being disposed adjacent said transfer station and having a plurality of oven stations moving in step-by-step manner in a closed circuit, a plurality of sets of support members carrying said material in various stages of manufacture of said hollow bodies, each of the sides of the turret receiving a respective one of said sets of support members, each of said oven stations receiving a respective one of said sets of support members, means removably and independently fixing said sets of support members respectively to said turret sides and to said oven stations, the step-by-step rotation of the turret moving each set of support members carried by the turret sides to each one of said turret stations, the step-by-step movement of said oven stations moving each set of support members carried by the oven structure step-by-step in starting at said transfer station and eventually ending at said transfer station, and means transferring of the sets of support members at said transfer station from said turret to said oven structure and subsequently from said oven structure to said turret, each of said sets comprising a plate carrying said support members, and said oven stations being each constituted by means defining a socket receiving the respective plate and each side of the turret being combined with said fixing means for the turret to define a cavity receiving the respective plate, said fixing means fixing each set to the side of the turret comprising on a top face and a bottom face of the turret pairs of upper locks and lower locks which are mounted to be rotatable in a horizontal plane on said top and bottom faces of the turret between a withdrawn position within the periphery of the turret and a locking position in which they project from the corresponding side of the turret, and lateral clamping jaws clamping the plate to the side of the turret.
- 22. A machine for continuously manufacturing hollow bodies by injection and blowing of material, comprising in combination a rotary polygonal-sided turret rotating in a step-by-step manner about an axis, a plurality of turret stations arranged around said axis of the turret and comprising an injection station injecting said material in the form of blanks, a blowing station having means axially stretching and then blowing said material into biaxially oriented hollow bodies, and intermediate stations between said injection station and said blowing station, said intermediate stations including a transfer station, an oven structure having means operable to heat the material to biaxial orientation temperature and being disposed adjacent said transfer station and having a plurality of oven stations moving in step-by-step manner in a closed circuit, a plurality of sets of support members carrying said material in various stages of manufacture of said hollow bodies, each of the sides of the turret receiving a respective one of said sets of support members, each of said oven stations receiving a respective one of said sets of support members, means removably and independently fixing said sets of support members respectively to said turret sides and to said oven stations, the step-by-step rotation of the turret moving each set of support members carried by the turret sides to each one of said turret stations, the step-by-step movement of said oven stations moving each set of support members carried by the oven structure step-by-step in starting at said transfer station and eventually ending at said transfer station, and means transferring of the sets of support members at said transfer station from said turret to said oven structure and subsequently from said oven structure to said turret, each of said sets comprising a plate carrying said support members, and said oven stations being each constituted by means defining a socket receiving the respective plate and each side of the turret being combined with said fixing means for the turret to define a cavity receiving the respective plate, each of said sets further comprising a finger member associated with a fork mounted on the turret shifting the finger member in translation, each support member being hollow and having a hollow rod extending through the support member with annular clearance, a nose carried by an end of the hollow rod, the finger member being connected to the hollow rod to move the hollow rod in translation relative to the support member and thereby shift the nose away from the end of the support member, means defining an exhaust manifold and a fluid supply manifold in the support plate, which supply manifold is connected to a source of support member-cooling fluid, said exhaust manifold permanently communicating with said annular spaces in said support members.
Specification