Injection blow-molding apparatus

Claim 2

An injection blow-molding apparatus comprising a core mounting pedestal having vertically and horizontally extended surfaces for mounting thereon molding cores each having a blowing hole therethrough, a rotating device for rotating the core mounting pedestal around a bisector of an apex angle formed between said two surfaces so that the molding cores mounted on the pedestal are thereby shifted between symmetrically arranged positions angularly spaced by 180*, a hydraulic device for moving the corE mounting pedestal forwardly and backwardly, a parison forming metal mold for receiving the horizontally disposed molding core and a blow-molding metal mold for receiving the vertically disposed molding core together with a parison formed thereon, another hydraulic device for opening, closing, and clamping said metal molds, and an injection device nozzle touching the parison forming metal mold.

Claim 3

An injection blow-molding apparatus comprising: a pair of frames oppositely disposed at both sides of an apparatus base; a pair of tie-rods extended between said two frames at diagonally located two positions; a pair of mold clamping plates slidably supported on said two tie-rods; a pair of hydraulic cylinders provided integral with said two frames, each including a hydraulic ram; said mold clamping plates being firmly connected to said hydraulic rams; a parison forming metal mold and a blow-molding metal mold both separable into two mold-halves connected to said mold clamping plates, respectively; two guiding rods operable as stationary pistons extended inwardly along said two frames; two hydraulic cylinders slidably mounted on said two guiding rods; a seating member formed integral with said hydraulic cylinders; a hydraulically rotating device mounted on said two guiding rods; a seating member formed integral with said hydraulic cylinders; a hydraulically rotating device mounted on said seating member at an angle of 45*; and a core mounting pedestal fixed to the lower part of said rotating device; said core mounting pedestal having two surfaces extended horizontally and vertically and a third surface extended obliquely thus forming an equilateral right-angular triangle in its cross-section, said two surfaces for mounting molding cores being directed toward said two metal molds, and said third surface being coupled to said lower part of the rotating device.

Claim 4

An injection blow-molding apparatus comprising: a pair of frames oppositely disposed at both sides of an apparatus base; a pair of tie-rods extended between said two frames at diagonally located two positions; a pair of mold clamping plates slidably supported on said two tie-rods; a pair of hydraulic cylinders provided integral with said two frames, each including a hydraulic ram; said mold clamping plates being firmly connected to said hydraulic rams; a parison forming metal mold and a blow-molding metal mold both separable into two mold-halves connected to said mold clamping plates, respectively; two guiding rods operable as stationary pistons extended inwardly along said two frames; two hydraulic cylinders slidably mounted on said two guiding rods; a seating member formed integral with said hydraulic cylinders; a hydraulically rotating device mounted on said two guiding rods; a seating member formed integral with said hydraulic cylinders; a hydraulically rotating device mounted on said seating member at an angle of 45*; and a core mounting pedestal fixed to the lower part of said rotating device; said core mounting pedestal having two surfaces extended horizontally and vertically and a third surface extended obliquely thus forming an equilateral right-angular triangle in its cross-section, said two surfaces for mounting molding cores being directed toward said two metal molds, and said third surface being coupled to said lower part of the rotating device.

Claim 5

An injection blow-molding apparatus as set forth in claim 2 wherein mold setting base plates are further provided for setting the relative positions between the parison forming metal mold, blow-molding metal mold, and the core mounting pedestal before these members are finally fixed to the designed positions, and said members are fixed to said mold clamping plates through said mold setting base plates.

Claim 6

An injection blow-molding apparatus as set forth in claim 2 wherein members such as collars are provided on each of said two tie-rods extended between said frames at diagonally located upper and lower positions so that the movements of the mold clamping plates are thereby restricted and the strokes of said hydraulic rams are thereby adjusted.

Claim 7

An injection blow-molding apparatus as set forth in claim 2 wherein said parison forming metal mold is formed by a neck mold separable into two mold-halves and a single block of the parison forming metal mold, and while the two halves of the neck mold are respectively fixed to said mold clamping plates, the single block of the parison forming metal mold is fixed to a die-plate provided at the injection device side of the frames.

Claim 8

An injection blow-molding apparatus as set forth in claim 1 wherein a product removing device hydraulically operable is further provided under the retracted position of said core mounting pedestal which is shifted horizontally by the hydraulic device.

Claim 9

An injection blow-molding apparatus as set forth in claim 2 wherein said frames are provided at both sides of said apparatus base, and a belt conveyor is disposed under the product removing device suspended underneath the backward ends of said arms.

Claim 10

An injection blow-molding apparatus as set forth in claim 2 wherein said hydraulic devices for the mold clamping plates on which said parison forming metal mold and said blow-molding metal mold, both being separable into two mold-halves, are fixed are provided on said frames at positions near said parison forming metal mold.