Zhangjiagang Putian Machinery Co., Ltd.

Some features of the blow molding machine

Some features of the blow molding mahcine:

1 the return member is a compression coil spring;

2 the mould base is attached to a traveller that is mounted so as to slide in a runner attached to the console;

3 the mould base is attached to a traveller consisting of a grooved shaft that is mounted so as to slide in a tubular casing attached to the console;

4 the cam follower element is attached to the traveller;

5 the control surface comprises a first section that controls the sliding of the mould base to the bottom position and a second section that controls the sliding of the mould base to the top position;

6 the control surface extends over an angular sector of the circular trajectory of the console, so that the trajectory of the console comprises a main angular sector during which the cam follower element is not in contact with the control surface and a secondary angular sector during which the cam follower element comes into contact with the control surface.

Some features and advantages of the blow moulding mahcine will appear on reading the following detailed description for the understanding of which reference will be made to the appended drawings in which:

FIG. 1 is a partial view in perspective that represents schematically a blow moulding machine fitted with a moulding unit made according to the teachings of the injection blow molding mahcine;

FIG. 2 is a view in perspective that represents partially and schematically the traveller fitted to the moulding unit according to the blow molding mahcine;

FIG. 2 a is a view similar to that of FIG. 2 that represents a variant embodiment of the traveller;

FIG. 3 is a view along the sectional plane 3 - 3 that represents schematically the traveller of FIG. 2;

FIG. 4 is a front view that shows schematically the moulding unit in the moulding position;

FIG. 5 is a view similar to that of FIG. 4 that represents schematically the moulding unit when the half- moulds are open and the mould base occupies its top position;

FIG. 6 is a view similar to that of FIG. 4 that schematically represents the blow molding machines when the half- moulds are open and the mould base occupies its bottom position.

In the following description, identical, similar or analogous elements will be indicated by the same reference numbers.

FIG. 1 shows a blow moulding machine 10 for the manufacture of containers based on preforms made of thermoplastic by blow moulding or stretch- blow moulding.

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