WO2008049137A1 - Réservoir pour fluides et son procédé de fabrication - Google Patents
Réservoir pour fluides et son procédé de fabrication Download PDFInfo
- Publication number
- WO2008049137A1 WO2008049137A1 PCT/ZA2006/000118 ZA2006000118W WO2008049137A1 WO 2008049137 A1 WO2008049137 A1 WO 2008049137A1 ZA 2006000118 W ZA2006000118 W ZA 2006000118W WO 2008049137 A1 WO2008049137 A1 WO 2008049137A1
- Authority
- WO
- WIPO (PCT)
- Prior art keywords
- mould
- reservoir
- closure member
- shells
- fluid reservoir
- Prior art date
Links
Classifications
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B65—CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
- B65D—CONTAINERS FOR STORAGE OR TRANSPORT OF ARTICLES OR MATERIALS, e.g. BAGS, BARRELS, BOTTLES, BOXES, CANS, CARTONS, CRATES, DRUMS, JARS, TANKS, HOPPERS, FORWARDING CONTAINERS; ACCESSORIES, CLOSURES, OR FITTINGS THEREFOR; PACKAGING ELEMENTS; PACKAGES
- B65D88/00—Large containers
- B65D88/02—Large containers rigid
- B65D88/06—Large containers rigid cylindrical
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
- B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
- B29C39/00—Shaping by casting, i.e. introducing the moulding material into a mould or between confining surfaces without significant moulding pressure; Apparatus therefor
- B29C39/02—Shaping by casting, i.e. introducing the moulding material into a mould or between confining surfaces without significant moulding pressure; Apparatus therefor for making articles of definite length, i.e. discrete articles
- B29C39/12—Making multilayered or multicoloured articles
- B29C39/123—Making multilayered articles
- B29C39/126—Making multilayered articles by casting between two preformed layers, e.g. deformable layers
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
- B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
- B29C41/00—Shaping by coating a mould, core or other substrate, i.e. by depositing material and stripping-off the shaped article; Apparatus therefor
- B29C41/02—Shaping by coating a mould, core or other substrate, i.e. by depositing material and stripping-off the shaped article; Apparatus therefor for making articles of definite length, i.e. discrete articles
- B29C41/04—Rotational or centrifugal casting, i.e. coating the inside of a mould by rotating the mould
- B29C41/06—Rotational or centrifugal casting, i.e. coating the inside of a mould by rotating the mould about two or more axes
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
- B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
- B29C41/00—Shaping by coating a mould, core or other substrate, i.e. by depositing material and stripping-off the shaped article; Apparatus therefor
- B29C41/02—Shaping by coating a mould, core or other substrate, i.e. by depositing material and stripping-off the shaped article; Apparatus therefor for making articles of definite length, i.e. discrete articles
- B29C41/22—Making multilayered or multicoloured articles
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B65—CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
- B65D—CONTAINERS FOR STORAGE OR TRANSPORT OF ARTICLES OR MATERIALS, e.g. BAGS, BARRELS, BOTTLES, BOXES, CANS, CARTONS, CRATES, DRUMS, JARS, TANKS, HOPPERS, FORWARDING CONTAINERS; ACCESSORIES, CLOSURES, OR FITTINGS THEREFOR; PACKAGING ELEMENTS; PACKAGES
- B65D90/00—Component parts, details or accessories for large containers
- B65D90/02—Wall construction
- B65D90/022—Laminated structures
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B65—CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
- B65D—CONTAINERS FOR STORAGE OR TRANSPORT OF ARTICLES OR MATERIALS, e.g. BAGS, BARRELS, BOTTLES, BOXES, CANS, CARTONS, CRATES, DRUMS, JARS, TANKS, HOPPERS, FORWARDING CONTAINERS; ACCESSORIES, CLOSURES, OR FITTINGS THEREFOR; PACKAGING ELEMENTS; PACKAGES
- B65D90/00—Component parts, details or accessories for large containers
- B65D90/02—Wall construction
- B65D90/028—Wall construction hollow-walled, e.g. double-walled with spacers
Definitions
- This invention relates to a fluid reservoir and, more particularly, to a fluid reservoir that is corrosion resistant and which displays good heat retention capabilities.
- Fluid reservoirs such as, for example, household geysers are typically manufactured from steel. Such reservoirs are prone to corrosion and accordingly need to be replaced after some years of use to avoid damage that could be caused by fluid leakage.
- the inventor believes that a need exists for providing a corrosion resistant fluid reservoir that does not need to be replaced regularly due to corrosion damage.
- the reservoir should have good heat retention capabilities so as to allow it to be used as a reservoir for a heated fluid.
- a fluid reservoir including:- an outer shell; - an inner shell defining a fluid chamber and being located in the outer shell in a spaced apart relationship thereto; an inlet and an outlet for permitting fluid flow communication with the fluid chamber; wherein the inner and outer shells are manufactured from a synthetic plastic material using rotational moulding.
- the synthetic plasties material may have good heat insulating properties.
- the synthetic plastics material may be linear low density polyethylene (LLDPE).
- the synthetic plastics material may be a thermoplastic material.
- the thermoplastic material may be selected from the group including: polyethylene, polypropylene, or a mixture of polyethylene and polypropylene.
- the distance between the outer and inner shells may be between 20 and 80 mm and is typically about 50 mm.
- An insulating material may be located in the space intermediate the outer and inner shells.
- the insulating material may be a polyurethane foam or a thermoplastic material.
- the inner and outer shells may be shaped complementally.
- the fluid reservoir and therefore the inner and outer shells may generally be in the shape of a cylinder. Accordingly, the inner and outer shells may form concentric cylinders. One or both ends of the cylinders may be open.
- the shells may be provided with flanges at their open end or ends to permit attachment of a closure member to said end or ends.
- the closure member may be manufactured from the same material from which the inner and outer shells are manufactured.
- the closure member may be manufactured by rotational moulding and may include a cavity located intermediate two walls defining the closure member.
- the cavity may be filled with an insulating material, which may be a polyurethane foam or a thermoplastic material.
- the closure member may include a flange extending from its perimeter to permit attachment of the closure member to the flanges of the inner and outer shells.
- a sealing member or O-ring manufactured from a natural or synthetic rubber may be located between the flanges of the closure member and the shells so as to promote sealing engagement between said flanges.
- the inlet and outlet may be defined in a closure member. Additional openings for providing a passage for electrical cables leading to a heating element located in the fluid chamber and for a fluid overflow line may be provided.
- Fluid flow controllers may be located in the inlet and outlet to the fluid chamber.
- the fluid flow controllers may be in the form of ball valves.
- the fluid flow controllers may be manufactured from the same thermoplastic material as the inner and outer shells.
- the fluid reservoir may be used as a household geyser for providing hot water.
- a method of manufacturing a fluid reservoir including at least the steps of:- providing a double-skinned mould for forming inner and outer shells of the fluid reservoir; introducing a synthetic plastics material into a cavity defined between the two skins of the mould and sealing the mould; - heating the mould and thereby the synthetic plastics material whilst subjecting the mould to rotation about its vertical and horizontal axes; permitting the mould to cool gradually; and removing the inner and outer shells from the mould.
- the synthetic plasties material may have good heat insulating properties.
- the synthetic plastics material may be linear low density polyethylene (LLDPE).
- the synthetic plastics material may be a thermoplastic material.
- the thermoplastic material may be selected from the group including: polyethylene, polypropylene, or a mixture of polyethylene and polypropylene.
- the mould may be heated to about 260 0 C.
- the method may include continuing the rotational motion of the mould whilst the mould is cooling.
- the distance between the outer and inner shells may be between 20 and 80 mm and is typically about 50 mm.
- An insulating material may be located in the cavity intermediate the outer and inner shells.
- the insulating material may be a polyurethane foam or a thermoplastic material.
- the mould may be in the form of a two concentric cylinders having one or two open ends.
- a flange may be defined at each of the open ends of the cylinders.
- the flange may be provided with spaced apart openings.
- the flanges may permit attachment of a closure member to said end or ends.
- Threaded metal rods typically manufactured from copper, may be bolted into said openings prior to the synthetic plastics material being introduced into the cavity.
- the synthetic plastics material coats the rods to form threaded openings for receiving bolts for attaching a closure member to the flange.
- the closure member may be manufactured from the same material as the inner and outer shells.
- the closure member may be manufactured by rotational moulding and may include a cavity located intermediate two walls defining the closure member.
- the cavity may be filled with an insulating material.
- the closure member may be provided with one or more openings to provide an inlet, an outlet, an overflow, and a passage for electrical cables.
- a sealing member or O-ring manufactured from a natural or synthetic rubber may be located between the closure member and the flange of the shells so as to promote sealing engagement between the closure member and the flange.
- Fluid flow controllers may be located in the inlet and outlet to the fluid chamber.
- the fluid flow controllers may be in the form of ball valves.
- the fluid flow controllers may be manufactured from the same material as the inner and outer shells.
- the fluid reservoir may be used as a household geyser for providing hot water.
- Figure 1 shows a perspective view of an outer portion of a mould used to manufacture a first embodiment of a fluid reservoir
- Figure 2 shows a perspective view of an inner portion of a mould used to manufacture a first embodiment of the fluid reservoir
- Figure 3 shows a closure member for sealing an open end of a first embodiment of the fluid reservoir
- Figure 4 shows a perspective view of inner and outer shells of a first embodiment of the fluid reservoir
- Figure 5 shows a perspective view of inner and outer shells of a second embodiment of a fluid reservoir
- Figure 6 shows an end view of the inner and outer shells of Figure 5;
- Figure 7 shows a side view of a closure member configured and dimensioned to be fitted to the shells of Figure 5;
- Figure 8 shows a side view of the shells of Figure 5 and two closure members of Figure 7 immediately prior to assembly to form the fluid reservoir;
- Figure 9 shows a sectioned side view of a second embodiment of the fluid reservoir.
- reference numeral 10 generally describes an embodiment of a fluid reservoir in accordance with the present invention.
- a method of manufacturing a fluid reservoir 10 includes at least the steps of providing a double-skinned mould 12.1 and 12.2 for forming inner and outer shells 14.1 and 14.2 of the fluid reservoir 10, introducing a thermoplastic material into a cavity 16 defined between the two skins 12.1 and 12.2 of the mould and sealing the mould. The mould and thereby the thermoplastic material is then heated to about 260 0 C whilst being subjected to rotation about its vertical and horizontal axes.
- the mould is permitted to cool gradually after which the inner and outer shells 14.1 and 14.2 are removed from the mould.
- the rotational motion of the mould is continued during cooling of the mould.
- thermoplastic material is selected from the group including: polyethylene, polypropylene, or a mixture of polyethylene and polypropylene. In the embodiment shown, the material used is polyethylene.
- the distance between the outer and inner shells 14.2 and 14.1 is about 50 mm.
- An insulating material 18 is located in the cavity 16 intermediate the outer and inner shells 14.2 and 14.1.
- the insulating material 18 is also a thermoplastic material.
- the mould includes two skins 12.2 and 12.1 that are generally in the form of a two concentric cylinders. One end of the skins 12.2 and 12.1 is open so that one end of the reservoir 10 formed will be open.
- a flange 20 is defined at the open end of the skins 12.2 and 12.1.
- the flange 20 is provided with spaced apart openings 22.
- the flange 20 permits attachment of a closure member 24 as shown in Figure 3 to the open end of the reservoir 10.
- Threaded metal rods (not shown), typically manufactured from copper, are bolted into said openings 22 prior to the thermoplastic material being introduced into the cavity 16. The thermoplastic material coats the rods to form threaded openings for receiving bolts for attaching the closure member 24 to the flange 20.
- the closure member 24 is manufactured from the same thermoplastic material as the inner and outer shells 14.1 and 14.2.
- the closure member 24 is manufactured by rotational moulding and includes a cavity 26 located intermediate two walls 28.1 and 28.2 defining the closure member 24.
- the cavity 26 is filled with an insulating material.
- the closure member 24 is provided with a plurality of openings 30 to provide an inlet, an outlet, an overflow, and a passage for electrical cables.
- a sealing member or O-ring (not shown) manufactured from a natural or synthetic rubber is located between the closure member 24 and the flange 20 so as to promote sealing engagement between the closure member 24 and the flange 20.
- Fluid flow controllers (not shown) are located in the inlet and outlet of the closure member 24.
- the fluid flow controllers are in the form of ball valves manufactured from the same thermoplastic material as the inner and outer shells 14.1 and 14.2.
- the fluid reservoir 10 in the embodiment shown is used as a household geyser for providing hot water.
- the inner shell 14.2 defines a fluid chamber 32.
- the geyser described is a gravity feed geyser. Should it be desired to provide a one kPa geyser, the fluid flow controller is omitted from the inlet. Referring now to Figures 5 to 9:
- a groove 34 for receiving an O-ring 36 therein is provided in a flange 20 located at an open end of a cylinder defined by inner and outer shells 14.1 and 14.2. Openings 38 for in use receiving bolts 40 therethrough are also provided in the flange 20.
- the inner and outer shells 14.1 and 14.2 are manufactured from linear low density polyethylene (LLDPE) as are the closure member 24.
- LLDPE linear low density polyethylene
- Polyurethane foam is used as an insulating material 18.
- the fluid reservoir 10 is provided with a heating element 42, a thermostat 44 and a fluid drain 46.
- a fluid outlet valve 48 is provided in one of the closure members 24 and a fluid inlet 50 including a ball valve is also provided.
- a floating board 52 mounted to the inner shell 14.1 by springs 54 is provided to aid the flow of fluid out of the chamber 32.
Landscapes
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Moulds For Moulding Plastics Or The Like (AREA)
Abstract
L'invention concerne un procédé de fabrication d'un réservoir pour fluides (10) comprenant au moins les étapes consistant à : fournir un moule à double paroi pour former des coques interne et externe (14.1 et 14.2) du réservoir pour fluides (10), introduire un matériau thermoplastique dans une cavité (16) définie entre les deux parois du moule, et rendre le moule étanche. Le moule et ainsi le matériau thermoplastique sont alors chauffés à environ 260°C tout en étant soumis à une rotation verticale et horizontale. Une fois que le matériau thermoplastique a enduit les surfaces du moule, on laisse refroidir le moule progressivement, puis les coques interne et externe (14.1 et 14.2) sont retirées du moule.
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
PCT/ZA2006/000118 WO2008049137A1 (fr) | 2006-10-19 | 2006-10-19 | Réservoir pour fluides et son procédé de fabrication |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
PCT/ZA2006/000118 WO2008049137A1 (fr) | 2006-10-19 | 2006-10-19 | Réservoir pour fluides et son procédé de fabrication |
Publications (1)
Publication Number | Publication Date |
---|---|
WO2008049137A1 true WO2008049137A1 (fr) | 2008-04-24 |
Family
ID=38002166
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
PCT/ZA2006/000118 WO2008049137A1 (fr) | 2006-10-19 | 2006-10-19 | Réservoir pour fluides et son procédé de fabrication |
Country Status (1)
Country | Link |
---|---|
WO (1) | WO2008049137A1 (fr) |
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US9349570B2 (en) | 2006-10-20 | 2016-05-24 | Fei Company | Method and apparatus for sample extraction and handling |
Citations (6)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US3426110A (en) * | 1965-03-26 | 1969-02-04 | Gen Motors Corp | Refrigerating apparatus |
WO1992003272A1 (fr) * | 1990-08-16 | 1992-03-05 | Nordic Industrier A/S | Corps creux et procede de rotomoulage |
AU649697B2 (en) * | 1990-08-02 | 1994-06-02 | Graham Edward Francis Rodgers | Improvements and modifications to insulated containers |
EP0710610A1 (fr) * | 1994-11-02 | 1996-05-08 | Bayer Ag | Citerne à paroi multicouche et son procédé d'obtention |
DE19818709A1 (de) * | 1998-04-21 | 1999-10-28 | Guenter Richter | Lagerungs- und Transportvorrichtung für flüssige Medien |
EP1155975A1 (fr) * | 2000-05-17 | 2001-11-21 | Roth Werke GmbH | Conteneur |
-
2006
- 2006-10-19 WO PCT/ZA2006/000118 patent/WO2008049137A1/fr active Application Filing
Patent Citations (6)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US3426110A (en) * | 1965-03-26 | 1969-02-04 | Gen Motors Corp | Refrigerating apparatus |
AU649697B2 (en) * | 1990-08-02 | 1994-06-02 | Graham Edward Francis Rodgers | Improvements and modifications to insulated containers |
WO1992003272A1 (fr) * | 1990-08-16 | 1992-03-05 | Nordic Industrier A/S | Corps creux et procede de rotomoulage |
EP0710610A1 (fr) * | 1994-11-02 | 1996-05-08 | Bayer Ag | Citerne à paroi multicouche et son procédé d'obtention |
DE19818709A1 (de) * | 1998-04-21 | 1999-10-28 | Guenter Richter | Lagerungs- und Transportvorrichtung für flüssige Medien |
EP1155975A1 (fr) * | 2000-05-17 | 2001-11-21 | Roth Werke GmbH | Conteneur |
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US9349570B2 (en) | 2006-10-20 | 2016-05-24 | Fei Company | Method and apparatus for sample extraction and handling |
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