Pressure container blank, method and blow moulding station for its manufacture

Abstract

A pressure tank blank made of a thermoplastic, having a body, which merges via a shoulder into a neck and a mouth, which is implemented for screwing in a valve, is usable for gases under high pressure, if the blank has a metal insert enveloped by the plastic on the interior to reinforce at least the shoulder of the blank. This pressure tank blank may be produced in an extrusion blow-molding method. For this purpose, with open blow mold, a metal insert having the inner contour of at least the shoulder of the blank is introduced into the corresponding area of the cavity of the blow mold and the tube, enclosing this metal insert, is extruded into the blow mold, before it is closed.

Description

Technical field [0001] The invention involves a pressure vessel -type blank made of thermoplastic plastic.Thread connection. [0002] The present invention also involves a pressure container that can be used that mainly includes a valve that is added with an additional outer bouring and threaded connection.The external reinforcement department, such as known ways, can be wrapped by fibrous fibers impregnated with synthetic resin. [0003] In addition, the present invention also includes methods for making the aforementioned type of pressure container -type blanks and blowing plastic formation stations. Background technique [0004] Pressure containers based on thermoplastic plastic types are used to store and supply fluids, such as propane or butane.Under the normal ambient temperature, the usual balance state occurs between the main liquid phase of the relevant fluid.Such cheap, bottle -shaped or cylinder -shaped pressure vessels with round profile surface have been proven in sm...

AI Technical Summary

Problems solved by technology

The application (in the field) of (in the field of) (in the field of) larger volumes and / or gases that generate a large internal pressure in the pressure vessel at ambient temperature, such as hydrogen, is still problematic, because the reinforced plastic type Blank pressure vessels have a high static burst strength, but there is a risk of rupture of the pressure vessel under defined dynamic loads, e.g. in a drop test

Another weak point is the seal between the neck or mouth of the container and the threaded valve, since neither the increase in the strength of the container wall nor the reinforcement described solves the problem of making the seal between the container and the threaded valve Connections are reliably non-disconnecting and airtight

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