WO2013155550A1 - Panneau de barrière et/ou de protection en treillis - Google Patents

Panneau de barrière et/ou de protection en treillis Download PDF

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Publication number
WO2013155550A1
WO2013155550A1 PCT/AU2013/000364 AU2013000364W WO2013155550A1 WO 2013155550 A1 WO2013155550 A1 WO 2013155550A1 AU 2013000364 W AU2013000364 W AU 2013000364W WO 2013155550 A1 WO2013155550 A1 WO 2013155550A1
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WO
WIPO (PCT)
Prior art keywords
mesh panel
polymer mesh
panel according
polymer
panel
Prior art date
Application number
PCT/AU2013/000364
Other languages
English (en)
Inventor
Shane Peter Gill
Original Assignee
Blh Safety Corporation 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
Priority claimed from AU2012901533A external-priority patent/AU2012901533A0/en
Application filed by Blh Safety Corporation Pty Ltd filed Critical Blh Safety Corporation Pty Ltd
Publication of WO2013155550A1 publication Critical patent/WO2013155550A1/fr

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Classifications

    • E—FIXED CONSTRUCTIONS
    • E06—DOORS, WINDOWS, SHUTTERS, OR ROLLER BLINDS IN GENERAL; LADDERS
    • E06B—FIXED OR MOVABLE CLOSURES FOR OPENINGS IN BUILDINGS, VEHICLES, FENCES OR LIKE ENCLOSURES IN GENERAL, e.g. DOORS, WINDOWS, BLINDS, GATES
    • E06B9/00—Screening or protective devices for wall or similar openings, with or without operating or securing mechanisms; Closures of similar construction
    • 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
    • B29C45/00—Injection moulding, i.e. forcing the required volume of moulding material through a nozzle into a closed mould; Apparatus therefor
    • 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
    • B29C48/00—Extrusion moulding, i.e. expressing the moulding material through a die or nozzle which imparts the desired form; Apparatus therefor
    • B29C48/25—Component parts, details or accessories; Auxiliary operations
    • B29C48/36—Means for plasticising or homogenising the moulding material or forcing it through the nozzle or die
    • B29C48/395—Means for plasticising or homogenising the moulding material or forcing it through the nozzle or die using screws surrounded by a cooperating barrel, e.g. single screw extruders
    • B29C48/45—Axially movable screws
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29D—PRODUCING PARTICULAR ARTICLES FROM PLASTICS OR FROM SUBSTANCES IN A PLASTIC STATE
    • B29D28/00—Producing nets or the like, e.g. meshes, lattices
    • E—FIXED CONSTRUCTIONS
    • E04—BUILDING
    • E04H—BUILDINGS OR LIKE STRUCTURES FOR PARTICULAR PURPOSES; SWIMMING OR SPLASH BATHS OR POOLS; MASTS; FENCING; TENTS OR CANOPIES, IN GENERAL
    • E04H17/00—Fencing, e.g. fences, enclosures, corrals
    • E04H17/14—Fences constructed of rigid elements, e.g. with additional wire fillings or with posts
    • E04H17/16—Fences constructed of rigid elements, e.g. with additional wire fillings or with posts using prefabricated panel-like elements, e.g. wired frames
    • E04H17/165—Fences constructed of rigid elements, e.g. with additional wire fillings or with posts using prefabricated panel-like elements, e.g. wired frames using panels with rigid filling and frame
    • E04H17/166—Fences constructed of rigid elements, e.g. with additional wire fillings or with posts using prefabricated panel-like elements, e.g. wired frames using panels with rigid filling and frame with cross-members
    • 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
    • B29C45/00—Injection moulding, i.e. forcing the required volume of moulding material through a nozzle into a closed mould; Apparatus therefor
    • B29C45/17—Component parts, details or accessories; Auxiliary operations
    • B29C45/26—Moulds
    • B29C45/2628—Moulds with mould parts forming holes in or through the moulded article, e.g. for bearing cages
    • 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
    • B29C48/00—Extrusion moulding, i.e. expressing the moulding material through a die or nozzle which imparts the desired form; Apparatus therefor
    • B29C48/001—Combinations of extrusion moulding with other shaping operations
    • 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
    • B29C48/00—Extrusion moulding, i.e. expressing the moulding material through a die or nozzle which imparts the desired form; Apparatus therefor
    • B29C48/001—Combinations of extrusion moulding with other shaping operations
    • B29C48/0017—Combinations of extrusion moulding with other shaping operations combined with blow-moulding or thermoforming
    • 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
    • B29C48/00—Extrusion moulding, i.e. expressing the moulding material through a die or nozzle which imparts the desired form; Apparatus therefor
    • B29C48/25—Component parts, details or accessories; Auxiliary operations
    • B29C48/269—Extrusion in non-steady condition, e.g. start-up or shut-down
    • B29C48/2694—Intermittent extrusion
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29L—INDEXING SCHEME ASSOCIATED WITH SUBCLASS B29C, RELATING TO PARTICULAR ARTICLES
    • B29L2031/00—Other particular articles
    • B29L2031/10—Building elements, e.g. bricks, blocks, tiles, panels, posts, beams
    • E—FIXED CONSTRUCTIONS
    • E04—BUILDING
    • E04G—SCAFFOLDING; FORMS; SHUTTERING; BUILDING IMPLEMENTS OR AIDS, OR THEIR USE; HANDLING BUILDING MATERIALS ON THE SITE; REPAIRING, BREAKING-UP OR OTHER WORK ON EXISTING BUILDINGS
    • E04G5/00—Component parts or accessories for scaffolds
    • E04G5/14—Railings
    • E04G2005/148—Railings latticed or netted

Definitions

  • the present invention relates to a polymer mesh panel for barricading and/or guarding applications.
  • the present invention relates to a polymer mesh panel for use in barricading, guarding, shielding, under stairway guarding, fencing and scaffolding applications.
  • the mesh panel may be utilised in numerous alternative applications.
  • Barricading and screening is widely used in applications such as guarding, temporary fencing and scaffolding to provide a physical barrier to impede persons or objects from falling.
  • Metallic panels are not suited for use in all environments, for example in corrosive environments, such as some plants and factories. Metal panels are also often susceptible to oxidisation unless heavily galvanised with regular maintenance, especially in outdoor applications. In environments where the panel may be deployed in a salt laden atmosphere for example in vicinity to the ocean, the oxidisation rate may be severe and reduce the effectiveness or viability of such panels. In addition, in some hospitality, commercial, industrial and defence applications the use of certain metals may be prohibited. [0007] A further disadvantage inherent with metal panels is that they are typically heavy to transport and install. This can add to the cost of the project, and potentially exposes persons involved with the assembly and disassembly to physical injury from heavy lifting, such as back related injuries. As a result, significant manual and/or mechanical power may be required to install metal panels which increase the cost of the project to the end user.
  • Additional disadvantages include that the metal panel may conduct electricity in the event of a short circuit, and produces carbon dioxide gas during manufacture.
  • a still further disadvantage with metal panels is that they are inherently rigid and difficult or not suitable for mounting in any configuration where the panel is required to flex or bend to accommodate non-planar mounting points.
  • Extruded lengths of plastic netting have also been used for barrier material.
  • One example disclosed in United States Patent 4,928,929 describes a safety netting for use at construction sites.
  • the netting comprises an extruded high density polyethylene flexible unitary web including a main portion provided with an array of apertures to form a net-like lattice and a continuous bendable toeboard portion.
  • the netting is flexible enough to allow the toeboard portion to be deformed and bent, but has a tensile strength sufficient to prevent motion of objects such as tools, bricks and other large construction materials past the safety netting at low to moderate speeds. The flexibility and material strength of this netting would not be sufficient to prevent a number of objects damaging the barrier.
  • FIG. 1 Other existing mesh products manufactured from polymeric material are produced for use in applications such as garden lattice. Such panels have physical and/or configuration properties unsuitable for barricading and screening applications.
  • a number of garden lattice panels are manufactured in a woven manner, similar to a fabric having weft and warp strands.
  • they may be manufactured from extruded tubes which are overlayed in a horizontally and vertically extending matrix and heated to affect local bonding of the joins. This construction makes the joins between the vertical and horizontal portions weak, and prone to failure when loaded.
  • the two stage manufacturing process is complicated which adds to manufacture costs.
  • a further disadvantage with existing polymer mesh products is that they typically suffer from problems such as distortion caused by the joint welding process, and inconsistency of joint quality. [0013] It would therefore be desirable to substantially overcome or at least ameliorate one or more of the above disadvantages, or to provide an alternative.
  • the present invention provides an integrally formed polymer mesh panel for barricading and/or guarding applications, the polymer mesh panel having a tensile strength of at least 20 MPa and able to withstand an impact force of at least 200 N.
  • the polymer mesh panel according to the present invention comprises a mesh structure which has advantageous strength and impact properties particularly suitable for barricading, shielding and/or guarding applications.
  • the mesh panel can be designed to provide the following benefits:
  • the polymer mesh panel has a tensile strength of at least 20 MPa, more preferably at least 30 MPa, and even more preferably at least 40 MPa.
  • the tensile strength is between 20 and 200 MPa, preferably between 30 and 100MPa, and more preferably between 40 and 75 MPa.
  • the polymer mesh panel is also configured to be able to withstand an impact force of at least 200N, more preferably at least 300 N, yet more preferably 400 N, and even more preferably at least 500 N. In some embodiments, polymer mesh panel is also configured to be able to withstand an impact force of between 300 N and 1500 N, preferably between 400 N and 100 N, and more preferably between 500 N and 800 N.
  • Embodiments of the polymer mesh panel can also include other desirable properties.
  • the polymer mesh panel preferably has a tensile modulus at least 1 GPa, more preferable at least 1.5GPa, even more preferably at least 2 GPa, and even more preferably at least 2.5 GPa.
  • the tensile modulus is between 1 GPa and 6 GPa, more preferably between 2 GPa and 5 GPa, and even more preferably between 2.5 GPa and 3.5 GPa.
  • the polymer mesh preferably has an aerodynamic drag C fig of less than 20, preferably less than 15, more preferably less than 10, even more preferably less than 7, even more preferably less than 3, yet even more preferably less than 1 .
  • the polymer mesh preferably has an aerodynamic drag C fig of less than 0.5, and more preferably less than 0.4. In preferred embodiments, the polymer mesh preferably has an aerodynamic drag C fig of between 0.1 and 20, more preferably between 0.2 and 5, and even more preferably between 0.3 and 1 .
  • the size, dimension and mass of the mesh panel can also influence the suitability of the mesh panel to barricading, shielding and/or guarding applications.
  • Preferred embodiments of the polymer mesh panel have a width by height of from 300 mm by 300 mm to 2 m by 2 m, more preferably from 500 mm by 500 mm to 1 .5 m by 1.5 m, and even more preferably between 800 mm by 800 mm to 1.2 m by 1 .2 m.
  • the polymer mesh preferably has a thickness from 2 mm to 20 mm, more preferably from 2 to 15 mm, even more preferably from 2 to 15 mm, and yet even more preferably from 3 mm to 7 mm. In one preferred embodiment the polymer mesh has a thickness of about 5 mm.
  • the polymer mesh panel preferably has a mass from 0.5 to 10 kg/m 2 , more preferably from 0.5 to 5 kg/m 2 , and yet more preferably between 1 and 3 kg/m 2 .
  • the composition of the polymer can also have an influence.
  • the mesh panel is manufactured from one or more thermoplastic, thermosets, or elastomers. More preferably, the polymer comprises at least one homopolymer, copolymer, blend or alloy including polycarbonate, polyvinyl chloride, or polyacrylonitrile. In some embodiments, the polymer is an impact modified and UV stabilised polymer.
  • Exemplary examples include impact modified polycarbonate, acrylonitrile butadiene styrene (ABS) and blends thereof with polycarbide, styrene polycarbide blends, Styrene maleic anhydride (SMA) and blends thereof with polycarbide, Styrene Methyl Methacrylate (S-MMA) and blends thereof with polycarbide, Acrylonitrile Ethylene Styrene (AES) and blends thereof with polycarbide, acrylonitrile styrene acrylate (ASA) and blends thereof with polycarbide, in particular an ASA/ polycarbide alloy.
  • ABS acrylonitrile butadiene styrene
  • SMA Styrene maleic anhydride
  • S-MMA Styrene Methyl Methacrylate
  • AES Acrylonitrile Ethylene Styrene
  • ASA acrylonitrile styrene acrylate
  • the mesh panel is manufactured from Geloy HRA222F, Geloy HRA170D and/or UPVC.
  • the mesh panel comprises a matrix of longitudinal members integrally connected at a plurality of nodes. Each node at a non-edge or corner portion of the matrix is preferably the junction of four of said longitudinal members, such that the matrix defines a plurality of quadrilateral shaped units.
  • Each quadrilateral shaped unit preferably comprises a regular polygon, preferably a four sided polygon, for example a square or a rectangle.
  • Each quadrilateral shaped unit is preferably sized from 5 mm x 5 mm to 100 mm x 100 mm, more preferably from 10 mm x 10 mm to 50 mm x 50 mm, and even more preferably from 20 mm x 20 mm to 35 mm to 35 mm. In one embodiment, quadrilateral shaped unit is sized 25 mm x 25 mm. In other embodiments, the quadrilateral shaped unit has a mean diameter between 10 mm and 100 mm, and preferably between 20 mm and 50 mm. In some embodiments, each quadrilateral shaped unit defines an aperture.
  • each of the longitudinal members each can have a substantially constant cross-sectional shape and cross-sectional area. While the longitudinal member can have any particular cross-sectional shape, it is preferred that the longitudinal members each have a generally circular, generally square or generally rectangular cross- section.
  • the thickness of the longitudinal members can also influence the mechanical properties of the mesh.
  • the longitudinal members preferably have a mean cross-sectional thickness from 2 mm to 20 mm, more preferably from 3 to 15 mm, and yet more preferably from 4 to 10 mm. In one preferred embodiment, the longitudinal members have a mean cross-sectional thickness of 5 mm.
  • the connecting nodes can also have a preferred configuration.
  • Each of the nodes preferably has a common thickness and a common minimum abutment radius between adjacent longitudinal members.
  • a web can be located in each quadrilateral shaped unit, the web extending between the longitudinal members.
  • the web has a thickness which is less than a cross-sectional width of each longitudinal member.
  • the web has a thickness which is greater than a cross-sectional width of each longitudinal member.
  • an aperture may be located in each web.
  • the aperture is preferably located in a generally central portion of said web.
  • the aperture can have a variety of shapes.
  • the aperture may have a generally, curved, polygon, square, rectangular shape, circle, ellipse, triangle or hexagon. However, it should be appreciated that the invention should not be limited to any one of those specific aperture shapes.
  • the aperture has a keyhole shape defined by a generally circular portion and an adjoining cut-out which is smaller in width than a diameter of the generally circular portion. In other embodiments, the aperture has a keyhole shape defined by a generally circular portion and an adjoining cut-out which is larger in width than a diameter of the generally circular portion.
  • Some embodiments of the mesh panel may further comprise a self-illuminating photo luminescent strip attached adjacent to the top and/or bottom of the mesh panel. This self-illuminating photo luminescent strip can be used to provide walkway evacuation guidance during a power outage in the area the mesh panel is installed.
  • the mesh panel of the first aspect of the present invention can be manufactured using a number of manufacturing methods.
  • the mesh panel of the first aspect of the present invention is manufactured using an injection moulding process.
  • the present invention provides a method of forming a mesh panel as described above, the method comprising the steps of:
  • thermoplastic or thermoset material heating a granular or pellet polymeric thermoplastic or thermoset material until the polymeric material is plastic and fluid enough to be extruded, formed or moulded;
  • the mesh panel can be manufactured using other plastic moulding process, such as extrusion and/or calendaring.
  • an extrusion process could be used in which the mesh panel according to the first aspect is formed using a method comprising the steps of:
  • thermoplastic or thermoset material heating a granular or pellet polymeric thermoplastic or thermoset material until the polymeric material is plastic and fluid enough to be extruded, formed or moulded;
  • the extrusion method can include the further steps of cutting the extruded polymeric material to required lengths. Apertures may be formed in the mesh panel by one or more of chemical, heat, microwave, ultra-sonic or vibration welding processes.
  • a calendaring process is used.
  • the method of manufacturing the panel may therefore comprise the following steps:
  • thermoplastic or thermoset material heating a granular or pellet polymeric thermoplastic or thermoset material until the polymeric material is plastic and fluid enough to be extruded, formed or moulded;
  • Figure 1 is a partial perspective view of a mesh panel according to a first embodiment
  • Figure 2 is a front detail showing a portion of the mesh panel of the first embodiment depicted in Figure 1 .
  • Figure 3 is a partial perspective view of a mesh panel according to a second embodiment
  • Figure 4 is a partial perspective view of a mesh panel according to a third embodiment
  • Figure 5 is a partial perspective view of a mesh panel according to a fourth embodiment
  • Figure 6 is a partial perspective view of a mesh panel according to a fifth embodiment
  • Figure 7 is a partial perspective view of a mesh panel according to a sixth embodiment
  • Figure 8 is a partial perspective view of a mesh panel according to a seventh embodiment
  • Figure 9 is a partial perspective view of a mesh panel according to an eighth embodiment
  • Figure 10 is a partial perspective view of a mesh panel according to a ninth embodiment
  • Figure 1 1 is a partial perspective view of a mesh panel according to a tenth embodiment
  • Figure 12 is a partial perspective view of a mesh panel according to an eleventh embodiment.
  • Figure 13 depicts an injection moulding process which can be utilised in manufacturing a mesh panel illustrated in each of Figures 1 to 12.
  • FIGs 1 to 12 illustrate various possible configurations of mesh panel 20 according to the present invention.
  • Each embodiment of the mesh panel 20 includes a grid matrix pattern therein, which prevents objects larger than the spacing of the matrix from falling off of an elevated surface or structure when installed.
  • a mesh panel according to the present invention may be embodied in many different forms, and some embodiments of the panel 20 will be discussed below. However, the present invention should not be strictly limited to those embodiments.
  • Figure 1 is a partial view of an embodiment of a polymer mesh panel 20 defined by a matrix of panel members 52 each having a generally circular cross-section.
  • a detailed front view showing a portion of the mesh panel 20 is included in Figure 2.
  • a longitudinal axis of each panel member 52 is either generally perpendicular or generally co-axial with a longitudinal axis of each adjacent panel member 52, such that the mesh panel 20 defines a plurality of mesh units 53.
  • the entirety of the mesh units 53 form apertures in the mesh.
  • the mesh units 53 can be generally square or generally rectangular depending on the height and width dimensions of the comprising panel member 52.
  • Figure 3 depicts an alternative embodiment of a mesh panel 20 defined by a matrix of generally rectangular members 52.
  • Figure 4 is an embodiment of a mesh panel 20 defined by a matrix of members 52 each having generally circular cross-sections.
  • a web 54 is located in each mesh unit 53 extending between four panel members 52, and the webs 54 are formed between each repeating mesh unit 53 of the matrix defined by four of the members 52.
  • a circular aperture 56 is located in each web 54.
  • the circular aperture 56 enables items to be secured to the panel 20, such as a mounting bracket for fastening the panel 20 to a support structure.
  • the aperture 56 permits air to pass therethrough, facilitating a reduction in the wind loading on the structure.
  • Figure 5 is a further embodiment of a mesh panel 20.
  • the panel 20 is similar to the panel 20 described above with respect to Figure 4, however the members 52 have generally rectangular cross-sections.
  • Figure 6 is a further embodiment of a mesh panel 20.
  • the panel 20 is similar to the panel 20 described above with respect to Figure 4, however the apertures 56 are hexagonal.
  • Figure 7 is a further embodiment of a mesh panel 20.
  • the panel 20 is similar to the panel described above with respect to Figure 6, however the members 52 have generally rectangular cross-sections.
  • Figure 8 is a further embodiment of a mesh panel 20.
  • the panel 20 is similar to the panel 20 described above with respect to Figure 4, however the apertures 56 are triangular.
  • Figure 9 is a further embodiment of a mesh panel 20.
  • the panel 20 is similar to the panel described above with respect to Figure 8, however the members 52 have generally rectangular cross-sections.
  • Figure 10 is a further embodiment of a mesh panel 20.
  • the apertures 56 are keyhole shaped apertures.
  • the keyhole shaped apertures 56 are defined by a generally circular portion 58, and an adjoining cut-out or slot 60 which is depicted smaller although may be larger in width than the diameter of the circular portion 58.
  • the keyhole shaped apertures 56 can be used to secure a product to the mesh panel 20. While the embodiment of Figure 10 is depicted with rectangular cross-section, it may also be produced with a generally circular cross-section.
  • Figure 1 1 is a further embodiment of a mesh panel 20.
  • the panel 20 is similar to the panel 20 described above with respect to Figure 4, however the apertures 56 are elliptical or oval shaped.
  • Figure 12 is a further embodiment of a mesh panel 20.
  • the panel 20 is similar to the panel described above with respect to Figure 1 1 , however the members 52 have generally rectangular cross-sections.
  • the webs 54 provide improved levels of impact absorption, visual, noise and light screening.
  • the web 54 provides increased diagonal bracing to the panel 20.
  • the small aperture size 56 in the webs 54 provide a significant reduction in dropped object risk, to workers operating at lower levels on a construction site, as the size of any object capable of fitting through the apertures 56 would have to be relatively small.
  • the apertures 56 provide a suitable mounting point to secure other items, or alternatively to secure the panels 20 to a support structure such as a vertical post or railing, or other adjacent panels 20.
  • the apertures 56 advantageously permit the flow of air through the mesh panel 20, thereby significantly reducing the wind loading which may be experienced in some locations, and accordingly reducing the load applied to the support structure.
  • the apertures 56 may be provided in other shapes. In practice, the apertures 56 may be of any curved or polygon shape, such as a pentagon, octagon etc.
  • any of the illustrated mesh panel 20 embodiments in Figures 1 to 12 may be provided with a self-illuminating photo luminescent strip attached adjacent to the top and/or bottom or some other portion of the mesh panel to provide walkway evacuation guidance during a power outage.
  • the mesh panel 20 can be designed and have a composition (as described below) which enables the panel to act as an immediate emergency flame and radiation inhibitor (when fire initiates outside the mesh panel 20) to assist in the protection of persons evacuating from the installation in which the panels are installed.
  • a composition as described below
  • mesh panel 20 is installed as a modular system and thus can have shared sections and/or panel members.
  • the mesh panel 20 can be designed to provide the following benefits:
  • the mesh panel 20 can also be designed to:
  • the mesh panel 20 may be manufactured in a variety of sizes. For most applications, the mesh panel 20 is manufactured between 300 mm x 300 mm to 2 m x 2 m. However, it should be appreciated that the panel could be manufactured in any shape or size, and may be cut down to any desired size or shape. In this respect, the mesh panel may be manufactured as a square, rectangular, or other regular four sided polygon within the above dimensions. For example, when used as a barricade for a walkway having a top rail, middle rail and kick plate, the mesh panel is preferably sized to fit 150 mm from the top rail and adapted to fit to the kick plate and middle rail. For Australian standards for railing, this typically requires a mesh panel size of 885 mm x 995 mm. In other applications, a mesh panel size of 1990 mm x 1690 mm, or 1990 mm x 845 mm may be used.
  • the mesh aperture (the opening formed by the entire mesh unit 53 in Figures 1 , 2 and 3, and shaped aperture 56 in other embodiments) size can also influence the properties of the mesh.
  • the mean dimensions of the mesh aperture can vary from 10 mm x 10 mm to 100 mm x 100 mm depending on the size and application of the mesh. In many instances the mesh aperture size is from 20mm x 20 mm to 60 mm to 60 mm. It should be appreciated that the actual width and height of each mesh aperture can vary within those limits depending on the shape of the mesh aperture. For example, rectangular apertures would have a different width and height.
  • the mesh apertures are 30 mm from centre to centre, and have an inside square size of 25mm, and outside square size of 35mm.
  • the thickness of the panel member 52 can also influence the mechanical properties of the mesh.
  • the panel member 52 preferably has a mean cross-sectional thickness of from 2 mm to 20 mm, more preferably from 3 to 15 mm, and yet more preferably from 4 and 10 mm. In exemplary embodiments, the thickness of the panel member 52 is about 5 mm.
  • the mesh panel 20 is preferably constructed light weight, having an installed mass of between 0.5 and 5 kg/m 2 and more preferably between 1 to 3 kg/m 2 . In some embodiments the mesh panel 20 can have an installed weight/mass of about 2.6 kg per metre 2 attached.
  • the mesh panel 20 is preferably constructed to have a thickness of between 2 mm and 20 mm. In most cases, a thickness of less than 2 mm will not impart the desired mechanical properties to the mesh panel and a thickness of over 20mm would result in a heavy panel or a panel having too much wind drag. In most instances, it is desirable to have a mesh panel of between 2 mm and 10mm, and more preferably from 3 mm and 7 mm thickness.
  • the mesh panel 20 can be manufactured and constructed from materials and in a particular configuration which has advantageous mechanical properties to meet the barricade and/or guarding function of the barricade or guarding arrangement the mesh panel 20 form a part. These mechanical properties are preferably:
  • the mesh panel 20 can be manufactured and constructed from materials and in a particular configuration which has other advantageous properties to meet the barricade and/or guarding function of the barricade or guarding arrangement the mesh panel 20 form a part. These other properties are preferably:
  • An open mesh as shown in Figures 1 and 2, it is preferably to have an aerodynamic drag C fig of less than 1 .
  • FRAS Fire retardant anti-static
  • the mesh panel also meets the relevant standard for that application.
  • relevant standards for Australia include AS1657 walkways Platforms and Stairways, Scaffolding AS 1576, Guidelines for Scaffolding AS 4576, and Safety of machinery AS 4024.1 and AS 4024.1601 - 2006.
  • mesh panel can be configured to meet the relevant United States Occupational Safety & Health Administration (OSHA) regulations including (but not limited to) Handrails etc - 1910.23, Machine Guarding - 1910.212 (General Requirements for all machines), Machine Guarding 1910.217 (Mechanical Power Presses), Scaffolding - 1910.28 - Safety Requirements. Additionally, embodiments of the mesh panel can be configured to meet the relevant United States Mine Safety & Health Administration (MSHA) Standards including (but not limited to) Guarding - 75.1722 Mechanical Equipment Guards, and Standard 56/57.141 12.
  • OSHA Occupational Safety & Health Administration
  • embodiments of the mesh panel can be configured to meet the following ISO (International Organization for Standardization) standards: EN ISO 13857; ISO 13849.
  • ISO International Organization for Standardization
  • Embodiments of the mesh panel can be configured to meet the following British Standards: EN 953; EN 954.
  • Embodiments of the mesh panel can be configured to meet Canadian Standards (CSA) Standard Z432.
  • CSA Canadian Standards
  • embodiments of the mesh panel can be configured to meet one or more of the relevant ASIA-OSH (Asian-Pacific Regional Network on Occupational Safety and Health Information) standards, including 1202 Provisions of Guards; 1203 Standard Machinery Guards; 1204 Machine Guard at Point of Operation; 1205 Transmission Machinery Guarding; 1206 Woodworking Machinery; 1207 Guarding Mechanical Power Presses and Foot and Hand Power Presses; 1068 Overhead Walks, Runways and Platforms; 1414 Scaffoldings; 1415 Construction Equipment; 1416 Plant and Equipment; 1061 Construction and Maintenance; 1062 Space Requirement; 1063 Walkway Surface; 1064 Floor and Wall Opening; 1065 Stairs; 1066 Window Openings; 1068 Overhead Walks, Runways and Platforms; 1069 Yards.
  • ASIA-OSH Asian-Pacific Regional Network on Occupational Safety and Health Information
  • mesh panel can be configured to meet, and the invention should not be limited to that list.
  • the mesh panel can be configured to meet a number of other standards required for various jurisdictions, states, countries and/or regions in which that mesh panel is used.
  • the mesh panel 20 of the present invention can be manufactured from a large variety of polymer material compositions to provide the above referred advantageous properties.
  • ABS Acrylonitrile Butadiene Styrene
  • HDPE High Density
  • TPE/R Thermoplastic Elastomer/ Rubber
  • Polypropylene PP, PP CS, any PP random copolymers
  • Geloy resins, blends and alloys ASA, ASA+AMSAN, ASA+PC, ASA+SAN;
  • the mesh panel 20 is manufactured from Geloy HRA222F/HRA170D and/or UPVC.
  • Geloy HRA222F is a multi-purpose, chlorine and bromine free flame retardant ASA-PC alloy for injection moulding processes.
  • Geloy HRA222F is advantageous because the base Polycarbonate (PC) polymer has a high tensile strength and Impact Resistance.
  • the addition of Acrylonitrile Styrene Acrylate (ASA) gives good UV resistance, flame resistance and chemical resistance properties. These properties are desirable in the mining and construction industries.
  • the mesh panel 20 may be manufactured through a number of polymer forming processes, some of which are described in more detail below:
  • Each mesh panel 20 of the present invention is preferably manufactured using an injection moulding process.
  • a general schematic of an injection moulding process which can be used to manufacture a mesh panel 20 is depicted in Figure 13.
  • a selected polymer/ plastic typically commences as granular particles or pellets 22 which are melted in an injection moulding machine 24.
  • the melted plastic is then injected under pressure into a mould 30, where it cools and solidifies in a short period of time.
  • the mould 30 is typically manufactured from steel or aluminium or other metal.
  • the mesh panel 20 of the present invention is preferably is currently injection moulded as a unitary product in a single mould.
  • the mesh panels 20 are typically large elements, measuring anywhere between 300mm x 300mm to 2m x 2m. A single unitary moulded panel unit therefore requires a large mould 30.
  • the two halves 32, 34 of the mould 30 Prior to the injection of the material into the mould 30, the two halves 32, 34 of the mould 30 are securely closed by the clamping unit. Each of the two halves 32, 34 of the mould 30 is attached to the injection moulding machine 24 and one half is permitted to slide (open and close). A hydraulic or electric powered clamping unit closes the mould 30 halves 32, 34 together and exerts sufficient force to keep the mould 30 securely closed while the required volume of plastic material 22 is injected.
  • the raw plastic material 22 is fed into the injection moulding machine and may be coloured by using pre-coloured master batch or a colour dosing attachment to the moulding machine 24, and advances towards the mould 30 by the injection unit, ram injector or reciprocating screw. During this process, the material is melted by a combination of heat and/or pressure. The molten plastic fluid is then injected into the mould 30 and the build-up of pressure packs and moulds the material. The amount of material that is injected is referred to as the shot.
  • the molten plastic 22 that is inside the mould 30 begins to cool (via water channels which keep the mould at a desired temperature) as soon as it makes contact with the interior mould 30 surfaces. As the plastic 22 cools within the mould 30, it will solidify into the shape of the mesh panel 20. However, during cooling some shrinkage of the moulded component will occur and is catered for in the mould design.
  • the cooled mesh panel 20 is ejected from the mould 30 by an ejection system, which is attached to the rear half of the mould 30.
  • a mechanism is used to push the mesh panel 20 out of the mould 30. Force must be applied to eject the part because during cooling the mesh panel 20 may shrink and adhere to the mould 30.
  • a mould release agent may be sprayed onto the inner surfaces of the mould 30 cavity prior to injection of the plastic material 22. Once the part is ejected, the mould 30 can be again clamped shut for the next shot to be injected. After the injection moulding cycle, some post processing may be applied to the mesh panel 20 to remove any seam lines, sprue or ejector pin marks or other visible manufacturing marks.
  • Various embodiments of the mesh panel may be manufactured using a compression moulding process.
  • the polymer material to be moulded is placed in the mould cavity and the heated platens are closed by hydraulic ram.
  • Thermoset resins either bulk moulding compound (BMC) or sheet moulding compound (SMC), are conformed to the mould shape by the applied pressure and heated until a curing reaction occurs.
  • SMC feed material usually is cut to conform to the surface area of the mould. The mould is then cooled and the part removed.
  • Thermoplastic resins may be loaded into the mould either in the form of pellets or sheet, or the mould may be loaded from a plasticating extruder. Thermoplastic materials are heated above their melting points, formed by the mould and cooled.
  • Calendering describes a process of feeding a molten plastic material between two or more crowned calender rollers from a Banbury mixer or a large extruder, the resultant sheet is fed onto a table to cool.
  • a plastic sheet can be formed using this process and on cooling the sheet may be punched or die cut into a mesh formatted appearance.
  • PVC is the major calendared material. However, it should be appreciated that other thermoplastics may be used.
  • thermoplastics While moulding parts using thermoplastics is widely understood, the extrusion of thermoplastic into profiles is less understood. Profile extrusion produces primarily constant cross-section parts that are subsequently cut into finite lengths. [00100] A basic description of the process is melt the raw material, shape it into the required profile by pushing the plastic material through a die, on leaving the die cool the profile while hauling the profile to a docking saw and cutting to required length.
  • thermoplastic materials in pellet or powder form are heated using electrical heat or frictional heat in an extruder until in a molten plastic state and then by single or twin screw auger feed fed through a die with an opening or openings that shape the material into the designed profile configuration.
  • the profile is cooled by vacuum or calibration or water bath or air template systems with the extrudate being hauled by the haul- off to the cutting or docking unit.
  • the profile may be fabricated into a permanent mesh form by the use of a template and heat for example hot plate, or chemical or laser or microwave or radio frequency or ultrasonic or vibration welding.
  • Extrusion materials are generally similar to those used in moulding - except as moulding materials flow easily and fill moulds they are difficult to extrude as extrusion materials must exit the die in a very stiff state known as the melt flow index (mfi) melt strength, melt stiffness, etc with the melt viscosity commonly shown as the material melt flow rate. Extrusion materials generally have a melt flow index of less than 1 while injection moulding materials typically exceed 8. Materials commonly extruded include PVC, ABS, Polypropylene, Polyethylene, Thermoplastic Elastomers, Polycarbonate, Aramids and many others.
  • a test mesh panel was constructed in accordance with the mesh panel 20 embodiment illustrated in Figures 1 and 2.
  • the test mesh panel comprised a panel section having the dimensions of 885 mm x 995 mm, 5 mm thickness.
  • the test mesh panel included mesh apertures (mesh units 52 in Figure 1 ) which are spaced apart 30 mm from centre to centre, and have an inside square size of 25mm, and outside square size of 35mm.
  • the test mesh panel was also formed from a matrix of panel members (component 52 in Figure 1 ) having a thickness of 5 mm.
  • the mesh panel was manufactured from polymer comprising Geloy HRA222F/HRA170D.
  • test mesh panel or representative parts thereof were tested according to a number of standard tests for the relevant properties.
  • test mesh panel or representative parts thereof were tested according to a number of standard tests for desired mechanical properties.
  • the results for mechanical properties, including tensile strength - break and yield, elongation - break and yield, and Tensile modulus are provided in Table 1.
  • a mesh panel of the subject test mesh panel configuration was tested according to a four different standard tests to provide impact resistance data.
  • the most applicable Australian Standard was AS 1 170.2, which specifies speed, mass and face dimensions for impact based on the requirement to withstand flying debris in cyclone conditions. This level was used as a guideline to determine the impact test level attained by mesh panel 20.
  • Method 1 Pressure deflection test.
  • Peak deflection of the test mesh panel with and without loading was measured to determine the deflection under this load. Peak deflection of 130mm was measured. The ability or otherwise of the mesh panel to return to its original position prior to deflection was also noted. The mesh panel returned to its original position after the 'sand' bags were removed and no damage to the mesh panel was noted.
  • Method 2 Vertical drop test on Mesh Panel simply supported.
  • test mesh panel did not fail under loads up to 7kg.
  • the maximum deflection of the mesh panel was for the 7kg load at 130mm and the mesh panel returned to the undeflected position when the mass was removed.
  • the impact force and impact energy sustained by the test mesh panel is summarised in Table 2.
  • Method 3 Vertical drop test on Mesh Panel attached to a Handrail Section.
  • a test mesh panel of the subject configuration was subjected to wind tunnel testing to measure drag and C fig (aerodynamic shape factor) values of the barrier attached to a standard handrail system, as well as the strength of the panel connection clips and force exerted on the platform to which they are attached in wind conditions between 0 and 50 m/s (180km/h).
  • C fig The aerodynamic drag (C fig ) for the various test configurations were determined for comparison.
  • C fig for the mesh panel is determined based on reference area, Az, which, for wind normal to the mesh panel, is 0.841 m 2 (0.995 x 0.845 m 2 ) the area enclosed by the external dimensions of the mesh panel.
  • the reference area for wind at an angle other than normal to the mesh panel is the projection of the area in the direction normal to the wind direction.
  • Table 5 Wind drag force on single mesh panel with clip fittings but no solid joiners.
  • the mesh panel deformed at least 50mm under maximum applied wind load but did not sustain any damage.
  • the mounting clips did not fail under this load.
  • Significant (>10mm) deflection of the mesh panel only occurred for wind speeds of 40 m/s and above.
  • Example 4 Fire Resistance according to BCA, AS 1530.2, AS1530.3, UL94
  • Flammability Index 1 (Range 0 - 100 for most material)
  • Table 6 provides a summary of the properties and tests that the subject test mesh panel achieved: [00135] Table 6: Test Result Summary
  • the polymer mesh panel of the present invention comprises a mesh structure which has advantageous strength and impact properties particularly suitable for barricading, shielding and/or guarding applications, including barrier guarding applications.
  • Each specific application includes specific local, state and national specification and/or standards to which that barrier or shield must comply.
  • barrier guarding applications of the mesh do not completely surround danger zones but rather restrict or prevent access by their size and separation from the danger zone, and there must be no wilful act to reach the danger zone.
  • Such barrier guards must be placed at a safe distance in accordance with the relevant minimum standards that may apply to the country or state.

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  • Engineering & Computer Science (AREA)
  • Architecture (AREA)
  • Structural Engineering (AREA)
  • Mechanical Engineering (AREA)
  • Civil Engineering (AREA)
  • Manufacturing & Machinery (AREA)
  • Compositions Of Macromolecular Compounds (AREA)

Abstract

La présente invention concerne un panneau en treillis polymère formé d'un seul tenant destiné des applications de barrière et/ou de protection, le panneau en treillis polymère ayant une résistance à la traction d'au moins 20 MPa et pouvant résister à une force de choc d'au moins 200 N.
PCT/AU2013/000364 2012-04-18 2013-04-10 Panneau de barrière et/ou de protection en treillis WO2013155550A1 (fr)

Applications Claiming Priority (6)

Application Number Priority Date Filing Date Title
AU2012901533A AU2012901533A0 (en) 2012-04-18 A mesh panel
AU2012901533 2012-04-18
AU2012902411 2012-06-08
AU2012902411A AU2012902411A0 (en) 2012-06-08 Mesh panel
AU2012904189A AU2012904189A0 (en) 2012-09-25 Barricading and/or guarding mesh panel
AU2012904189 2012-09-25

Publications (1)

Publication Number Publication Date
WO2013155550A1 true WO2013155550A1 (fr) 2013-10-24

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WO (1) WO2013155550A1 (fr)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2021026591A1 (fr) * 2019-08-09 2021-02-18 Dragox Pty Ltd Barrière et panneau associé
CN113306060A (zh) * 2021-07-09 2021-08-27 钟玉兰 一种解决涂料不易回收利用问题的涂料压片用辅助装置

Citations (7)

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US4854767A (en) * 1987-02-13 1989-08-08 Just Japan Co., Ltd. Assembly-type barricade
WO1992003273A1 (fr) * 1990-08-23 1992-03-05 Rema Industries & Services Pty. Ltd. Machine destinee a former des articles en materiaux thermoplastiques
US5177890A (en) * 1989-06-14 1993-01-12 Iskra Industry Co., Ltd. Panel fence
US5424020A (en) * 1989-08-21 1995-06-13 Sumitomo Chemical Company, Limited Method for producing molded article of fiber-reinforced thermoplastic resin
US20070278468A1 (en) * 2006-06-06 2007-12-06 Zacarias Felix M Novel modular molded frame with interchangeable design panels for vinyl fencing and its method of fabrication
US20100283022A1 (en) * 2009-02-03 2010-11-11 Warren Delafield Modular Railing Systems with Cellular PVC Panels
US20110074201A1 (en) * 2008-04-08 2011-03-31 Formway Furniture Limited Injection moulding method

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Publication number Priority date Publication date Assignee Title
US4854767A (en) * 1987-02-13 1989-08-08 Just Japan Co., Ltd. Assembly-type barricade
US5177890A (en) * 1989-06-14 1993-01-12 Iskra Industry Co., Ltd. Panel fence
US5424020A (en) * 1989-08-21 1995-06-13 Sumitomo Chemical Company, Limited Method for producing molded article of fiber-reinforced thermoplastic resin
WO1992003273A1 (fr) * 1990-08-23 1992-03-05 Rema Industries & Services Pty. Ltd. Machine destinee a former des articles en materiaux thermoplastiques
US20070278468A1 (en) * 2006-06-06 2007-12-06 Zacarias Felix M Novel modular molded frame with interchangeable design panels for vinyl fencing and its method of fabrication
US20110074201A1 (en) * 2008-04-08 2011-03-31 Formway Furniture Limited Injection moulding method
US20100283022A1 (en) * 2009-02-03 2010-11-11 Warren Delafield Modular Railing Systems with Cellular PVC Panels

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2021026591A1 (fr) * 2019-08-09 2021-02-18 Dragox Pty Ltd Barrière et panneau associé
CN113306060A (zh) * 2021-07-09 2021-08-27 钟玉兰 一种解决涂料不易回收利用问题的涂料压片用辅助装置
CN113306060B (zh) * 2021-07-09 2023-01-17 岳阳林峰高科有限公司 一种解决涂料不易回收利用问题的涂料压片用辅助装置

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