FR2883954A1 - Fibre-reinforced plastic container for gas-liquid contents under autogenous pressure, e.g. butane, propane or beer, made by rotational moulding with incorporation of inserts and other accessories - Google Patents

Abstract

u A fibre-reinforced plastic container for gas-liquid mixtures under autogenous pressure, comprises a casing made by rotational moulding, with inserts and other fittings being incorporated during the moulding cycle. A hollow container, closed by an insert and under pressure from its gas-liquid contents (I), comprises a casing made of fibre-containing pigmented synthetic material(s) (II), including synthetic foam, which are UV-resistant, food quality, inert towards (I), recyclable and isothermic, these materials being introduced simultaneously or successively into a mould through a suitable inlet or a gas insert of the screw-thread type during a single rotational moulding cycle so as to form a single casing.

Description

2883954 I

  The invention relates to the design and the method of manufacturing a hollow synthetic volume, closed by an insert, for supporting the pressure of the gas-liquid contained therein.

  Currently these containers are made of metal with welds and paints 5 little recyclable and very expensive.

  The synthetic material used for this hollow volume may be, for example, polyethylene, polypropylene, polyamide or other, non-degradable with the contained gas, colored with pigments, flame retarded, recyclable, resistant to ultraviolet rays, of quality food if necessary. These synthetic materials are optionally filled with adjuvants of glass fiber type, carbon, Kevlar, hemp or other for a better tensile strength. It is also possible, by synthetic foams, to thermally isolate and dampen the shocks of the container.

  To open and close this volume, an insert FIG 1. This preferably comprises, in its central core, a thread of the gas type FIG 1- 50. On its upper part an external thread 53 to fix a possible cover , rumps 56, and a large peripheral rim 59 perforated 61 in places for the materials to completely enclose and provide a perfect seal. This insert is made of metal, carbon, Kevlar or other solid material resistant to high temperatures. Its wide rim is located below the upper ribs 66 of the casing which prevents it, under pressure, from coming out of the container FIG 5-88-90.

  Furthermore, other inserts are provided: spot FIG 2., with internal thread 68 and perforated peripheral rim for fixing FIG 3-70 a wheel system 72 and a retractable handle 74 for easy transport of the container; 4-76 serve as a reinforcement to the envelope to protect shocks more particularly the upper portions FIG 5-78 and lower 80 peripherals of the container. Similarly, the periphery 82 of the ribs surrounding the gas opening insert or other suitable cap protects it. In addition, in the mold, there is one or more electronic chips 84 previously protected by thermal insulation to be incorporated in the container envelope. These chips, not scrambled by a metal envelope, allow the management, maintenance, traceability, etc ... of the container. With the exception of the insert no gas screws, all other inserts and chips are incorporated into areas of the container shell without gas contact (solid ribs

for example).

  The mold, opening in at least two parts, preferably metal, must reproduce by its internal face, the outer shape of the container. Engravings for texts or illustrations, in reverse, are made on the inside of the mold for reproduction on the container. Likewise for the ribs FIG 5.90 necessary for the compression of the pressures exerted by the gas-liquid contained. In addition the inner faces of the mold have rounded edges and edges and one or two handles incorporated by course in the upper and lower peripheral FIG 6-93 of the container.

  For the manufacture of the volume-container is used the method rotomolding, preferably.

  In the mold, before closing, all the abovementioned inserts are fixed at the appropriate places, and a first quantity of synthetic material is introduced in the form of a divided solid. Then, the mold is closed and animated by a double rotation, it is heated. . As soon as the first quantity of material merges, it is possible to introduce, simultaneously or successively, additional layers of material into the mold, via the gas screw insert or another suitable orifice, without interrupting the conversion cycle, according to the desired quantities. and, with or without adjuvants. At the end of the transformation and after cooling the mold is opened and the envelope containing become solid, with the inserts and chips completely incorporated.

  We test the container at the pressure, sealing, shock, etc .... and we equip wheels, retractable handle, regulator, hood.

  Thus realized this closed synthetic container is silent because plastic, dampens the shocks by its ribs, foaming and its peripheral inserts, is transported easily (wheels, handle), if it explodes, wounds less (plastic), is incorrodable, rot-proof, fireproof , isothermal, food grade if necessary, 100% recyclable, traceable (microchip), customizable (engravings), indelible (colored in its mass), reliable and inexpensive (industrial production), and, by its rounded reliefs, is not hurtful. Also many applications are possible with this container: Bottles of domestic gas (butane, propane ...), keg of beer or other gaseous liquids or pastes generating pressure.

3 2883954

Claims (6)

  1 The hollow container volume, closed by an insert, subjected to the pressure of the gas-liquid that it contains is characterized in that it consists of an envelope composed of one or more synthetic materials loaded with adjuvants in fibers and colored pigments, with synthetic foams, which materials, resistant to ultraviolet rays, of food quality, non-degradable with gas-liquid content, recyclable, isothermal, are simultaneously or successively introduced into the mold through a suitable orifice or by a gas screw type insert during a single transformation cycle obtained by the rotational molding process and thus forms a single envelope.   2 The hollow container volume, according to claim 1, is characterized in that the opening and closing insert which the team is made of metal, carbon or KEVLAR and comprises for example on its axis a step of gas screw (50), in the upper part a thread (53), strips (56) and a large flange (59) perforated (61) in places over its entire periphery, as well as threaded point inserts (68,70) and linear (76,78,80,82) which have perforated edges, and all these inserts are fixed in the mold to be incorporated in the plastics during rotomolding.   3 The hollow volume, compliant. in claim 1, is characterized by integral solid ribs integral with the container (90) which surround its periphery in particular on its lower and upper part where they must overcome the opening-closing insert, (59, 66, 88) for part, and are made by rotational molding.   4 The hollow volume, according to claim 2, is characterized in that it comprises a wheel system (72) and a retractable handle (74) fixed by screwing, for example, to the point inserts and integral reinforcements of the linear inserts (78, 80, 82).   The hollow volume according to claim 1, is characterized in that it comprises engravings in relief or in relief on the internal face of the mold reproduced on the external face of the container, during the rotomonlage.   The hollow volume, according to claim 1, is characterized in that it comprises one or more isothermal electronic chips (84) arranged in the mold and incorporated in the container envelope during rotational molding.   7 The hollow volume according to claim 1 is characterized in that it comprises one or two handles incorporated by recess (93) in its upper and lower outer peripheral rib and rounded edges and edges on all its external faces.