WO1997038839A1 - Processus de rotomoulage ameliore - Google Patents

Processus de rotomoulage ameliore Download PDF

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Publication number
WO1997038839A1
WO1997038839A1 PCT/AU1997/000224 AU9700224W WO9738839A1 WO 1997038839 A1 WO1997038839 A1 WO 1997038839A1 AU 9700224 W AU9700224 W AU 9700224W WO 9738839 A1 WO9738839 A1 WO 9738839A1
Authority
WO
WIPO (PCT)
Prior art keywords
articles
rotational moulding
reinforcing elements
thermoplastics
thermoplastics material
Prior art date
Application number
PCT/AU1997/000224
Other languages
English (en)
Inventor
Peter John Unkles
Original Assignee
Linpac Mouldings Pty. Ltd.
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Linpac Mouldings Pty. Ltd. filed Critical Linpac Mouldings Pty. Ltd.
Priority to GB9821869A priority Critical patent/GB2328396B/en
Priority to CA002251953A priority patent/CA2251953A1/fr
Priority to AU22812/97A priority patent/AU712587B2/en
Priority to DE19781702T priority patent/DE19781702T1/de
Priority to NZ332747A priority patent/NZ332747A/en
Priority to US09/171,237 priority patent/US6180203B1/en
Publication of WO1997038839A1 publication Critical patent/WO1997038839A1/fr

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
    • B65D19/00—Pallets or like platforms, with or without side walls, for supporting loads to be lifted or lowered
    • B65D19/0004—Rigid pallets without side walls
    • B65D19/0006—Rigid pallets without side walls the load supporting surface being made of a single element
    • B65D19/0008—Rigid pallets without side walls the load supporting surface being made of a single element forming a continuous plane contact surface
    • B65D19/001—Rigid pallets without side walls the load supporting surface being made of a single element forming a continuous plane contact surface the base surface being made of a single element
    • B65D19/0014—Rigid pallets without side walls the load supporting surface being made of a single element forming a continuous plane contact surface the base surface being made of a single element forming discontinuous or non-planar contact surfaces
    • B65D19/0016—Rigid pallets without side walls the load supporting surface being made of a single element forming a continuous plane contact surface the base surface being made of a single element forming discontinuous or non-planar contact surfaces and each contact surface having a stringer-like shape
    • 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
    • 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
    • B29C41/20—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 incorporating preformed parts or layers, e.g. moulding inserts or for coating articles
    • 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
    • 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
    • B29C44/00—Shaping by internal pressure generated in the material, e.g. swelling or foaming ; Producing porous or cellular expanded plastics articles
    • B29C44/02—Shaping by internal pressure generated in the material, e.g. swelling or foaming ; Producing porous or cellular expanded plastics articles for articles of definite length, i.e. discrete articles
    • B29C44/04—Shaping by internal pressure generated in the material, e.g. swelling or foaming ; Producing porous or cellular expanded plastics articles for articles of definite length, i.e. discrete articles consisting of at least two parts of chemically or physically different materials, e.g. having different densities
    • B29C44/0423—Shaping by internal pressure generated in the material, e.g. swelling or foaming ; Producing porous or cellular expanded plastics articles for articles of definite length, i.e. discrete articles consisting of at least two parts of chemically or physically different materials, e.g. having different densities by density separation
    • B29C44/043—Shaping by internal pressure generated in the material, e.g. swelling or foaming ; Producing porous or cellular expanded plastics articles for articles of definite length, i.e. discrete articles consisting of at least two parts of chemically or physically different materials, e.g. having different densities by density separation using a rotating mould
    • 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
    • B29C70/00—Shaping composites, i.e. plastics material comprising reinforcements, fillers or preformed parts, e.g. inserts
    • B29C70/04—Shaping composites, i.e. plastics material comprising reinforcements, fillers or preformed parts, e.g. inserts comprising reinforcements only, e.g. self-reinforcing plastics
    • B29C70/26—Non-fibrous reinforcements only
    • 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
    • B65D19/00—Pallets or like platforms, with or without side walls, for supporting loads to be lifted or lowered
    • B65D19/0004—Rigid pallets without side walls
    • B65D19/0006—Rigid pallets without side walls the load supporting surface being made of a single element
    • B65D19/0008—Rigid pallets without side walls the load supporting surface being made of a single element forming a continuous plane contact surface
    • B65D19/001—Rigid pallets without side walls the load supporting surface being made of a single element forming a continuous plane contact surface the base surface being made of a single element
    • B65D19/0014—Rigid pallets without side walls the load supporting surface being made of a single element forming a continuous plane contact surface the base surface being made of a single element forming discontinuous or non-planar contact surfaces
    • B65D19/0018—Rigid pallets without side walls the load supporting surface being made of a single element forming a continuous plane contact surface the base surface being made of a single element forming discontinuous or non-planar contact surfaces and each contact surface having a discrete foot-like shape
    • 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
    • B65D2519/00—Pallets or like platforms, with or without side walls, for supporting loads to be lifted or lowered
    • B65D2519/00004—Details relating to pallets
    • B65D2519/00009—Materials
    • B65D2519/00014—Materials for the load supporting surface
    • B65D2519/00034—Plastic
    • 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
    • B65D2519/00—Pallets or like platforms, with or without side walls, for supporting loads to be lifted or lowered
    • B65D2519/00004—Details relating to pallets
    • B65D2519/00009—Materials
    • B65D2519/00014—Materials for the load supporting surface
    • B65D2519/00044—Combination, e.g. different elements made of different materials, laminates
    • 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
    • B65D2519/00—Pallets or like platforms, with or without side walls, for supporting loads to be lifted or lowered
    • B65D2519/00004—Details relating to pallets
    • B65D2519/00009—Materials
    • B65D2519/00049—Materials for the base surface
    • B65D2519/00069—Plastic
    • 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
    • B65D2519/00—Pallets or like platforms, with or without side walls, for supporting loads to be lifted or lowered
    • B65D2519/00004—Details relating to pallets
    • B65D2519/00009—Materials
    • B65D2519/00049—Materials for the base surface
    • B65D2519/00079—Combination, e.g. different elements made of different materials, laminates
    • 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
    • B65D2519/00—Pallets or like platforms, with or without side walls, for supporting loads to be lifted or lowered
    • B65D2519/00004—Details relating to pallets
    • B65D2519/00258—Overall construction
    • B65D2519/00313—Overall construction of the base surface
    • B65D2519/00328—Overall construction of the base surface shape of the contact surface of the base
    • B65D2519/00333—Overall construction of the base surface shape of the contact surface of the base contact surface having a stringer-like shape
    • 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
    • B65D2519/00—Pallets or like platforms, with or without side walls, for supporting loads to be lifted or lowered
    • B65D2519/00004—Details relating to pallets
    • B65D2519/00258—Overall construction
    • B65D2519/00313—Overall construction of the base surface
    • B65D2519/00328—Overall construction of the base surface shape of the contact surface of the base
    • B65D2519/00338—Overall construction of the base surface shape of the contact surface of the base contact surface having a discrete foot-like shape
    • 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
    • B65D2519/00—Pallets or like platforms, with or without side walls, for supporting loads to be lifted or lowered
    • B65D2519/00004—Details relating to pallets
    • B65D2519/00258—Overall construction
    • B65D2519/00398—Overall construction reinforcements
    • B65D2519/00432—Non-integral, e.g. inserts
    • B65D2519/00437—Non-integral, e.g. inserts on the load supporting surface
    • 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
    • B65D2519/00—Pallets or like platforms, with or without side walls, for supporting loads to be lifted or lowered
    • B65D2519/00004—Details relating to pallets
    • B65D2519/00258—Overall construction
    • B65D2519/00398—Overall construction reinforcements
    • B65D2519/00432—Non-integral, e.g. inserts
    • B65D2519/00442—Non-integral, e.g. inserts on the base surface
    • 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
    • B65D2519/00—Pallets or like platforms, with or without side walls, for supporting loads to be lifted or lowered
    • B65D2519/00004—Details relating to pallets
    • B65D2519/00547—Connections
    • B65D2519/00552—Structures connecting the constitutive elements of the pallet to each other, i.e. load supporting surface, base surface and/or separate spacer
    • B65D2519/00557—Structures connecting the constitutive elements of the pallet to each other, i.e. load supporting surface, base surface and/or separate spacer without separate auxiliary elements
    • B65D2519/00562—Structures connecting the constitutive elements of the pallet to each other, i.e. load supporting surface, base surface and/or separate spacer without separate auxiliary elements chemical connection, e.g. glued, welded, sealed
    • 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
    • B65D2519/00—Pallets or like platforms, with or without side walls, for supporting loads to be lifted or lowered
    • B65D2519/00004—Details relating to pallets
    • B65D2519/00736—Details
    • B65D2519/00935—Details with special means for nesting or stacking
    • B65D2519/00955—Details with special means for nesting or stacking stackable
    • B65D2519/0096—Details with special means for nesting or stacking stackable when empty

Definitions

  • This invention relates to rotational moulding of plastics articles and in
  • thermoplastics materials employed in rotational moulding
  • processes are the polyolefins, including polyethylene and polypropylene,
  • thermoplastic resins are suitable for use
  • extruder is pumped directly, under screw pressure, into a shaped hollow die
  • the injection extrusion of reclaimed plastics is generally used to
  • the articles are characterised by high mass, bulky
  • the applicant's earlier method comprises a two cycle method of first
  • the core of said hollow body a flowable mass of plastics material, preferably
  • This method is particularly suited to producing
  • the improved method is suited to the production of bulky articles
  • structural members such as wall, roof, or floor panels.
  • the invention resides in a method for rotational moulding of articles
  • thermoplastics material comprising at least one thermoplastics material having a first particle
  • thermoplastics material having a larger particle size
  • thermoplastic material fuses to form an outer skin
  • thermoplastics material fuses to form an inner
  • the melt temperature of the second thermoplastics material may be any suitable thermoplastics material.
  • thermoplastics material is comprised of
  • thermoplastics material is homopolymeric.
  • the second thermoplastics material may be a mixture of polymeric
  • the second thermoplastics material includes a quantity of
  • thermosetting polymeric material thermosetting polymeric material
  • thermoplastics material includes a quantity
  • the decomposition temperature of the foaming agent is preferably
  • the second thermoplastics material includes a quantity of
  • If required particles ofthe second thermoplastics material may include
  • the method may also include the step
  • reinforcing elements are located in a spaced array thereby forming bridges
  • the reinforcing elements are larger than the particle size of
  • the reinforcing elements may be generally spherical or generally
  • the reinforcing elements are mechanically engaged
  • the reinforcing elements are at least partially fused to
  • the reinforcing elements may include an adhesion resistant coating
  • first and second thermoplastics materials during the fusing of said skins.
  • the reinforcing elements may include an adhesion resistant
  • thermoplastics materials during the fusing of said skins.
  • the adhesion resistant additive may be selected from one
  • a soap such as calcium stearate or the like, a silicone oil or a suitable
  • the reinforcing elements may be of a solid, hollow or foamed
  • the reinforcing elements may be comprised of virgin or
  • the reinforcing elements may be comprised of ceramics
  • the method may also include the
  • the reinforcement structure may be constructed of plastics or metallic
  • the reinforcement structure comprises steel or aluminium
  • the reinforcing structure may comprise angle or channel
  • the invention resides in an article manufactured
  • the article may comprise a shipping pallet, man-hole cover, tank lid,
  • the article may comprise a structural member, such as a wall panel,
  • the invention resides in a rotationally moulded
  • leg means comprise rails depending from opposite side
  • the rails include a series of depending lugs which
  • FIG 1 is a perspective view of a shipping pallet manufactured in
  • FIG 2 is a partial elevational cross-section of the shipping pallet
  • FIG 3 is a partial elevational cross-section of a structural panel made
  • FIG 4 is an isometric view of an alternative embodiment of a shipping
  • FIG 5 is a front elevation of the shipping pallet shown in FIG 4.
  • the shipping pallet 1 of the embodiment comprises a deck 2, and
  • FIG 2 is a schematic cross-section illustrating the construction of the
  • pallet 1 which comprises an outer skin 5, a foamed inner skin 6, spaced
  • reinforcing members 7 in the form of foamed macro-spheres and residual voids 8.
  • the random spaced array of reinforcing members forms a bridging
  • the outer skin layer 5 is formed from a virgin
  • polyolefin typically an opaque polyethylene, which can provide a smooth or
  • the outer skin may also be coloured as
  • the bridging layer 9 comprises Tollable reinforcing elements in the
  • the reinforcing elements are pre-formed by
  • reinforcing elements are foamed polyolefin, but may
  • the balls are of a diameter
  • the reinforcing elements may be of
  • any appropriate reliable shape such as cylindrical pellets, and alternatively
  • the rotational moulding process uses a mould formed to the desired
  • Shipping pallets are generally 1200 mm square by
  • polyolefin 50 mm in diameter.
  • the rotational moulding apparatus (not shown) can be any of the
  • plastics pellets thereby forming the inner skin on the inward facing
  • the balls are surface coated with talc in the mould.
  • the process produces a pallet having a double skinned wall and a spaced array of reinforcing
  • oven temperature refers to the ambient
  • plastics materials comprising the skins, so as to take advantage of the
  • melt flow index MFI
  • plastics materials See for example the melt temperatures set out above in
  • plastics material for the inner skin can be chosen such that opposing surfaces of the inner skin touch one another
  • plastics need not be pre-sorted by colour.
  • thermosetting from reclaimed polyolefins, granulated scrap plastics such as thermosetting
  • polymers may be incorporated into the inner skin material, because the pre-
  • thermoplastics material can include organic or inorganic filler material.
  • a suitable inorganic filler material is talc, whilst the organic filler
  • material could be cellulosic including recycled newspapers, rice or peanut
  • FIG 3 shows a schematic cross-section of a building panel made
  • the building panel 10 includes an outer skin 11 , an inner skin 12, a
  • thermosetting plastics spacers 16 The spacing and quantity of reclaimed
  • plastics material for the inner skin is chosen so as to substantially
  • reinforcing means may be comprised of angle or channel profiled members.
  • FIG 4 shows another embodiment of a shipping pallet 17, which
  • the central rail provides additional support for the deck thereby resulting
  • the deck 18 includes a plurality of recesses 21 in its upper surface.
  • the recess are arranged to cooperate with lugs 22 disposed on the lower
  • the recess and lug combination is but one arrangement which could
  • One alternative might include providing slots in

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Chemical & Material Sciences (AREA)
  • Composite Materials (AREA)
  • Pallets (AREA)
  • Moulding By Coating Moulds (AREA)

Abstract

La présente invention concerne un procédé de rotomoulage d'articles comprenant une étape de rotomoulage d'un mélange de matières plastiques particulaires contenant au moins une matière thermoplastique d'une première dimension de particules et une deuxième matière thermoplastique d'une dimension de particules supérieure, procédé selon lequel la première matière thermoplastique fond pour former une croûte extérieure (5) et la deuxième matière thermoplastique fond ensuite pour former un revêtement intérieur (6) soudé à la croûte extérieure d'un article moulé ainsi obtenu. Ledit procédé peut également comprendre une étape qui consiste à incorporer dans le moule aux première et deuxième matières thermoplastiques plusieurs éléments de renforcement moulés pouvant être roulés (7), lesdits éléments de renforcement étant disposés à intervalles réguliers de manière à former des ponts entre les surface du revêtement intérieur au fur et à mesure où elles se dilatent. On décrit également des articles formés par rotomoulage selon le présent procédé, tels que des palettes d'expédition.
PCT/AU1997/000224 1996-04-16 1997-04-09 Processus de rotomoulage ameliore WO1997038839A1 (fr)

Priority Applications (6)

Application Number Priority Date Filing Date Title
GB9821869A GB2328396B (en) 1996-04-16 1997-04-09 Improved rotational moulding process
CA002251953A CA2251953A1 (fr) 1996-04-16 1997-04-09 Processus de rotomoulage ameliore
AU22812/97A AU712587B2 (en) 1996-04-16 1997-04-09 Improved rotational moulding process
DE19781702T DE19781702T1 (de) 1996-04-16 1997-04-09 Verbessertes Verfahren für das Rotationsformen
NZ332747A NZ332747A (en) 1996-04-16 1997-04-09 Improved rotational moulding process
US09/171,237 US6180203B1 (en) 1997-04-09 1997-04-09 Rotational moulding process

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
AUPN9281A AUPN928196A0 (en) 1996-04-16 1996-04-16 Rotational moulding process
AUPN9281 1998-04-16

Publications (1)

Publication Number Publication Date
WO1997038839A1 true WO1997038839A1 (fr) 1997-10-23

Family

ID=3793595

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/AU1997/000224 WO1997038839A1 (fr) 1996-04-16 1997-04-09 Processus de rotomoulage ameliore

Country Status (6)

Country Link
AU (1) AUPN928196A0 (fr)
CA (1) CA2251953A1 (fr)
DE (1) DE19781702T1 (fr)
GB (1) GB2328396B (fr)
NZ (1) NZ332747A (fr)
WO (1) WO1997038839A1 (fr)

Cited By (16)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2788063A1 (fr) * 1999-01-05 2000-07-07 Bp Chemicals Snc Composition rotomoulee a base de polyethylene
EP1076011A1 (fr) * 1999-08-12 2001-02-14 Paul Craemer GmbH Palette en plastique
US6261490B1 (en) 1998-09-15 2001-07-17 Rotec Chemicals Limited Rotational moulding
EP1273415A2 (fr) * 2001-07-07 2003-01-08 Gordon Ellis & Co. Objets moulés et méthodes de fabrication d'objets moulés
WO2003045657A1 (fr) * 2001-11-24 2003-06-05 Gordon Ellis & Company Articles moules par rotation et leur procede de production
EP1358988A1 (fr) * 2002-04-30 2003-11-05 Gesikat Ltd. Procédé de fabrication de pièces par moulage par rotation
EP1360047A1 (fr) * 2001-02-05 2003-11-12 3DM Technologies, Inc. Procedes pour former des plastiques, appareils pour former des plastiques et articles formes a partir de ces derniers
WO2006114622A1 (fr) * 2005-04-26 2006-11-02 Pvaxx Research And Development Limited Equipement porte-charge et procede de fabrication
EP1757424A1 (fr) * 2005-08-05 2007-02-28 Allibert-Buckhorn Europe Procédé de rotomulage de pièces creuses, et ossature de structure porteuse
EP1775226A3 (fr) * 2004-03-19 2008-09-24 Pvaxx Research and Development Limited Appareil porte-charge et procédé de fabrication
EP2345593A1 (fr) * 2004-03-19 2011-07-20 Pvaxx Research and Development Limited Appareil de support de charge et procédés de fabrication
WO2015089586A1 (fr) * 2013-12-20 2015-06-25 Aus Group Alliance Pty Ltd Panneau en plastique et structures utilisant celui-ci
EP2190905A4 (fr) * 2007-08-28 2017-03-08 Gala Industries, Inc. Procédé et appareil pour un moulage à cisaillement minimal perfectionné, utilisant une extrusion, une pelletisation et une rhéologie à l'état fondu contrôlées de pastilles et de micropastilles, et objets moulés obtenus par ce procédé et cet appareil
US11047135B2 (en) 2017-03-09 2021-06-29 Aus Group Alliance Pty Ltd Moulded cladding panel
CN113942253A (zh) * 2021-10-27 2022-01-18 陕西天翌天线股份有限公司 一种一体化制备复合材料方舱的方法
US11608601B2 (en) 2017-04-27 2023-03-21 Aus Group Alliance Pty Ltd Sound attenuation barrier with improved ease of assembly

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GB2412107B (en) * 2004-03-19 2008-12-24 Pvaxx Res & Dev Ltd Load-carrying apparatus
WO2020077382A1 (fr) 2018-10-15 2020-04-23 Pact Group Industries (ANZ) Pty Ltd Panneaux acoustiques et leur procédé de fabrication

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US3542912A (en) * 1967-12-12 1970-11-24 Nypel Inc Rotational molding method for forming multilayered articles
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GB2228891A (en) * 1989-03-09 1990-09-12 Mckechnie Consumer Prod Moulding a pallet onto a high friction surface
WO1995019877A2 (fr) * 1994-01-22 1995-07-27 The Queen's University Of Belfast Procede de moulage rotatif et produits moules au moyen du procede
WO1995022449A1 (fr) * 1994-02-18 1995-08-24 Automated Plastic Systems Pty. Ltd. Appareil de rotamoulage automatique et procede de commande
WO1996015892A1 (fr) * 1994-11-17 1996-05-30 Exxon Chemical Patents Inc. Particules multicouche pour rotomoulage
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GB1190379A (en) * 1966-12-08 1970-05-06 Aquitaine Fisons Ltd Moulding Plastics
US3542912A (en) * 1967-12-12 1970-11-24 Nypel Inc Rotational molding method for forming multilayered articles
US4533696A (en) * 1982-02-20 1985-08-06 Stamicarbon B.V. Polymer powder compositions, particularly polyethylene powder compositions and objects to be made and made thereof
GB2228891A (en) * 1989-03-09 1990-09-12 Mckechnie Consumer Prod Moulding a pallet onto a high friction surface
WO1995019877A2 (fr) * 1994-01-22 1995-07-27 The Queen's University Of Belfast Procede de moulage rotatif et produits moules au moyen du procede
WO1995022449A1 (fr) * 1994-02-18 1995-08-24 Automated Plastic Systems Pty. Ltd. Appareil de rotamoulage automatique et procede de commande
WO1996015892A1 (fr) * 1994-11-17 1996-05-30 Exxon Chemical Patents Inc. Particules multicouche pour rotomoulage
WO1996033060A1 (fr) * 1995-04-19 1996-10-24 Industrie Ilpea S.P.A. Procede permettant de former des articles presentant des couches d'epaisseur regulee

Cited By (27)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US6261490B1 (en) 1998-09-15 2001-07-17 Rotec Chemicals Limited Rotational moulding
WO2000040386A1 (fr) * 1999-01-05 2000-07-13 Bp Chemicals Limited Composition rotomoulee a base de polyethylene
FR2788063A1 (fr) * 1999-01-05 2000-07-07 Bp Chemicals Snc Composition rotomoulee a base de polyethylene
EP1076011A1 (fr) * 1999-08-12 2001-02-14 Paul Craemer GmbH Palette en plastique
EP1360047A4 (fr) * 2001-02-05 2004-07-28 3Dm Technologies Inc Procedes pour former des plastiques, appareils pour former des plastiques et articles formes a partir de ces derniers
CN1309545C (zh) * 2001-02-05 2007-04-11 3Dm技术公司 塑料成形的方法和设备及由此制造的塑料制品
EP1360047A1 (fr) * 2001-02-05 2003-11-12 3DM Technologies, Inc. Procedes pour former des plastiques, appareils pour former des plastiques et articles formes a partir de ces derniers
EP1273415A2 (fr) * 2001-07-07 2003-01-08 Gordon Ellis & Co. Objets moulés et méthodes de fabrication d'objets moulés
EP1273415A3 (fr) * 2001-07-07 2003-03-05 Gordon Ellis & Co. Objets moulés et méthodes de fabrication d'objets moulés
WO2003045657A1 (fr) * 2001-11-24 2003-06-05 Gordon Ellis & Company Articles moules par rotation et leur procede de production
EP1358988A1 (fr) * 2002-04-30 2003-11-05 Gesikat Ltd. Procédé de fabrication de pièces par moulage par rotation
EP1775226A3 (fr) * 2004-03-19 2008-09-24 Pvaxx Research and Development Limited Appareil porte-charge et procédé de fabrication
EP2345593A1 (fr) * 2004-03-19 2011-07-20 Pvaxx Research and Development Limited Appareil de support de charge et procédés de fabrication
EP2345592A1 (fr) * 2004-03-19 2011-07-20 Pvaxx Research and Development Limited Appareil de support de charge et procédés de fabrication
EP2354023A1 (fr) * 2004-03-19 2011-08-10 Pvaxx Research and Development Limited Appareil de support de charge et procédés de fabrication
AU2006238941B2 (en) * 2005-04-26 2011-05-26 Pvaxx Research And Development Limited Load carrying apparatus and method of manufacture
WO2006114622A1 (fr) * 2005-04-26 2006-11-02 Pvaxx Research And Development Limited Equipement porte-charge et procede de fabrication
US9138945B2 (en) 2005-04-26 2015-09-22 Paxxal Inc. Load carrying apparatus and method of manufacture
EP1757424A1 (fr) * 2005-08-05 2007-02-28 Allibert-Buckhorn Europe Procédé de rotomulage de pièces creuses, et ossature de structure porteuse
EP2190905A4 (fr) * 2007-08-28 2017-03-08 Gala Industries, Inc. Procédé et appareil pour un moulage à cisaillement minimal perfectionné, utilisant une extrusion, une pelletisation et une rhéologie à l'état fondu contrôlées de pastilles et de micropastilles, et objets moulés obtenus par ce procédé et cet appareil
WO2015089586A1 (fr) * 2013-12-20 2015-06-25 Aus Group Alliance Pty Ltd Panneau en plastique et structures utilisant celui-ci
US10472825B2 (en) 2013-12-20 2019-11-12 Aus Group Alliance Pty Ltd Plastic panel and structures using the same
US11230841B2 (en) 2013-12-20 2022-01-25 Aus Group Alliance Pty Ltd Plastic panel and structures using the same
US11047135B2 (en) 2017-03-09 2021-06-29 Aus Group Alliance Pty Ltd Moulded cladding panel
US11608601B2 (en) 2017-04-27 2023-03-21 Aus Group Alliance Pty Ltd Sound attenuation barrier with improved ease of assembly
CN113942253A (zh) * 2021-10-27 2022-01-18 陕西天翌天线股份有限公司 一种一体化制备复合材料方舱的方法
CN113942253B (zh) * 2021-10-27 2024-02-20 陕西天翌科技股份有限公司 一种一体化制备复合材料方舱的方法

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AUPN928196A0 (en) 1996-05-09
NZ332747A (en) 2000-02-28
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GB2328396B (en) 1999-12-15
GB2328396A (en) 1999-02-24
DE19781702T1 (de) 1999-04-29

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