Blow molding machine for containers and mandrel holder
AssigneeKrones AG
InventorWolfgang Schonberger
Life of this patent
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Abstract
A blow molding machine for containers, having a conveyor path carrying a mandrel holder and pre-forming mandrels attached to the mandrel holders in an exchangeable manner by means of removable couplings, wherein each coupling has a mandrel clamping mechanism and a releasing element accessible form outside that can be adjusted at least relative to the mandrel holder for releasing the clamping mechanism. In the mandrel holder, particularly for use in a blow molding machine, the mandrel clamping mechanism is designed with a ball joint lock, and the ball joint lock can be released by means of a releasing element in order to exchange a performing mandrel.
Claims16
Blow molding machine for containers, in particular bottles, comprising a conveyor path carrying mandrel holders, pre-forming mandrels attached at the mandrel holders by means of releasable couplings in an exchangeable manner, and each coupling having a mandrel clamping mechanism and a releasing element accessible from outside that can be adjusted at least relative to the mandrel holder for releasing the clamping mechanism, wherein the clamping mechanism is a ball joint lock with at least one ball and each at least one ball is arranged in a passage of the mandrel holder between a surface in the mandrel holder one of oblique or conical with respect to the axis of the mandrel holder in a pull-off direction of the pre-forming mandrel and the mandrel push-in seat that is open at one end;
- the passage being a bore that narrows from an outside to an inside in a wall of the mandrel holder limiting the mandrel push-in seat inside, and a ball clearance zone provided between the wall and the one of oblique or conical surface;
- and the releasing element being a movable sleeve that engages in the ball clearance zone from one end and is guided on the wall, the sleeve being supported in the mandrel holder such that it cannot be pulled out and is directed to the ball.
Mandrel holder for a pre-forming mandrel for a blow molding machine with a releasable coupling for attaching and fixing one each of different pre-forming mandrels at the same mandrel holder in an exchangeable manner, wherein the coupling comprises a mandrel clamping mechanism with a ball joint lock and a releasing element accessible from outside that can be adjusted at least relative to the mandrel holder for releasing the ball joint lock, the releasing element being a sleeve including an opening permitting displacement of a ball of the ball joint lock, wherein the clamping mechanism only locks in a separating direction of the pre-forming mandrel, and the pre-forming mandrel can be inserted in the clamping mechanism without actuation of the releasing element.
Dependencies are inferred from the claim text.