Cebal Sas

Cebal Sa

Bertrand Gruau

Michel Bosshardt

Herve Zakrzewski

Hervé Zakrzewski

A method for the compression molding of a plastic part including a neck which is equipped with an orifice, in which a blank is created and compressed. The part is molded with a neck which is equipped with a top wall including a thin area with a notch, the contour of this thin area defining the orifice, and two zones which can withstand the mechanical stress necessary in order to break the top wall at the notch. One of the two zones is intended to transmit the mechanical stress and the other is used as a support. The section of the notch is slightly inclined in relation to the axis of the neck. After molding, mechanical stress is applied to one part of the top wall, other than the thin area, so that the top wall tears at the notch, thereby producing the dispensing orifice.

Method of producing a compression-moulded plastic part comprising a neck which is equipped with a dispensing orifice

Apparatus for manufacturing flexible tubes comprising a skirt and a head provided with a neck and a shoulder linking the neck to the skirt, the apparatus having a first zone devoted to manufacturing the skirts, a second zone devoted to manufacturing the flexible tubes, a third zone devoted to finishing the flexible tubes thus produced, a first transfer device transferring the skirts in continuous motion from the first zone to the second zone, and a second transfer device transferring, in continuous motion synchronized with the former, the tubes from the second zone to the third zone. The second zone has a third transfer device for transferring the punches in continuous motion synchronized with that of the first transfer device and with that of the second transfer device, loading device for loading the skirts on the punches associated with the synchronized movement of said first and third transfer devices, and unloading devices for freeing the punches from the tubes covering them for associated with the synchronized movement of the second and third transfer devices.

Manufacturing apparatus for flexible plastic tubes

The invention relates to a method for producing objects and object parts formed by an assembly comprising at least two plastic parts (and' and&#x2032;), which can move in relation to one another with at least one degree of freedom and which are provided with surfaces having at least partially complementary shapes such that, in at least one geometric configuration, they are solidly interconnected on a common surface (&#x2032;) in close, clearance-free contact The inventive method comprises the following steps: 1) molding of a first part (&#x2032;) by compression or injection; 2) removal of the second tool, the first part (&#x2032;) remaining solidly connected to the first tool which serves as a piece of support equipment or is installed on a piece of support equipment (); 3) compression molding of the second part using the whole () of the first part which is integral to the support equipment and a third tool; 4) removal of the first support tool () and the third tool () and extraction of the assembly () thus formed.

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Braux Sainte Cohiere, France

Bertrand Gruau