| abstract |
method for producing a pressure-resistant and / or leak-proof flask to contain a gas and / or liquid. the present invention relates to a method for the manufacture of pressure-resistant gas and / or liquid-proof containers made from thermoplastic materials. for this purpose, the method comprises the following steps: providing an external and removable mandrel around a neck, followed by providing, on the internal part of such mandrel, a thermoplastic material for the manufacture of an internal thermoplastic wall. after that, the outer mandrel is removed and the thermoplastic inner wall is filled with a coolant. then, the additional thermoplastic material is disposed on the outside of the thermoplastic wall and is consolidated during the provision of the same, right after the same or both. after that, the coolant is removed and the container is ready for use. |