GB2061177A - Moulding articles which include embedded mesh-like material - Google Patents

Moulding articles which include embedded mesh-like material Download PDF

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Publication number
GB2061177A
GB2061177A GB8032384A GB8032384A GB2061177A GB 2061177 A GB2061177 A GB 2061177A GB 8032384 A GB8032384 A GB 8032384A GB 8032384 A GB8032384 A GB 8032384A GB 2061177 A GB2061177 A GB 2061177A
Authority
GB
United Kingdom
Prior art keywords
moulding
mesh material
mould
hull
mesh
Prior art date
Legal status (The legal status 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 status listed.)
Withdrawn
Application number
GB8032384A
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Macalister Elliott & Partners
Original Assignee
Macalister Elliott & Partners
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 Macalister Elliott & Partners filed Critical Macalister Elliott & Partners
Priority to GB8032384A priority Critical patent/GB2061177A/en
Publication of GB2061177A publication Critical patent/GB2061177A/en
Withdrawn legal-status Critical Current

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Classifications

    • 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
    • B29C70/28—Shaping operations therefor
    • B29C70/30—Shaping by lay-up, i.e. applying fibres, tape or broadsheet on a mould, former or core; Shaping by spray-up, i.e. spraying of fibres on a mould, former or core
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B28—WORKING CEMENT, CLAY, OR STONE
    • B28B—SHAPING CLAY OR OTHER CERAMIC COMPOSITIONS; SHAPING SLAG; SHAPING MIXTURES CONTAINING CEMENTITIOUS MATERIAL, e.g. PLASTER
    • B28B23/00—Arrangements specially adapted for the production of shaped articles with elements wholly or partly embedded in the moulding material; Production of reinforced objects
    • B28B23/02—Arrangements specially adapted for the production of shaped articles with elements wholly or partly embedded in the moulding material; Production of reinforced objects wherein the elements are reinforcing members
    • B28B23/04—Arrangements specially adapted for the production of shaped articles with elements wholly or partly embedded in the moulding material; Production of reinforced objects wherein the elements are reinforcing members the elements being stressed
    • B28B23/12—Arrangements specially adapted for the production of shaped articles with elements wholly or partly embedded in the moulding material; Production of reinforced objects wherein the elements are reinforcing members the elements being stressed to form prestressed circumferential reinforcements
    • B28B23/16—Prestressed reinforcing nets
    • 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
    • B29C70/28—Shaping operations therefor
    • B29C70/30—Shaping by lay-up, i.e. applying fibres, tape or broadsheet on a mould, former or core; Shaping by spray-up, i.e. spraying of fibres on a mould, former or core
    • B29C70/302—Details of the edges of fibre composites, e.g. edge finishing or means to avoid delamination
    • 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
    • B29C70/28—Shaping operations therefor
    • B29C70/54—Component parts, details or accessories; Auxiliary operations, e.g. feeding or storage of prepregs or SMC after impregnation or during ageing
    • B29C70/56—Tensioning reinforcements before or during shaping
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B63—SHIPS OR OTHER WATERBORNE VESSELS; RELATED EQUIPMENT
    • B63B—SHIPS OR OTHER WATERBORNE VESSELS; EQUIPMENT FOR SHIPPING 
    • B63B5/00—Hulls characterised by their construction of non-metallic material
    • B63B5/24—Hulls characterised by their construction of non-metallic material made predominantly of plastics
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29K—INDEXING SCHEME ASSOCIATED WITH SUBCLASSES B29B, B29C OR B29D, RELATING TO MOULDING MATERIALS OR TO MATERIALS FOR MOULDS, REINFORCEMENTS, FILLERS OR PREFORMED PARTS, e.g. INSERTS
    • B29K2067/00—Use of polyesters or derivatives thereof, as moulding material
    • B29K2067/06—Unsaturated polyesters
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29K—INDEXING SCHEME ASSOCIATED WITH SUBCLASSES B29B, B29C OR B29D, RELATING TO MOULDING MATERIALS OR TO MATERIALS FOR MOULDS, REINFORCEMENTS, FILLERS OR PREFORMED PARTS, e.g. INSERTS
    • B29K2105/00—Condition, form or state of moulded material or of the material to be shaped
    • B29K2105/06—Condition, form or state of moulded material or of the material to be shaped containing reinforcements, fillers or inserts
    • B29K2105/08—Condition, form or state of moulded material or of the material to be shaped containing reinforcements, fillers or inserts of continuous length, e.g. cords, rovings, mats, fabrics, strands or yarns
    • B29K2105/0809—Fabrics
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29K—INDEXING SCHEME ASSOCIATED WITH SUBCLASSES B29B, B29C OR B29D, RELATING TO MOULDING MATERIALS OR TO MATERIALS FOR MOULDS, REINFORCEMENTS, FILLERS OR PREFORMED PARTS, e.g. INSERTS
    • B29K2105/00—Condition, form or state of moulded material or of the material to be shaped
    • B29K2105/06—Condition, form or state of moulded material or of the material to be shaped containing reinforcements, fillers or inserts
    • B29K2105/16—Fillers
    • 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
    • B29L2031/30—Vehicles, e.g. ships or aircraft, or body parts thereof
    • B29L2031/3067—Ships
    • B29L2031/307—Hulls

Landscapes

  • Engineering & Computer Science (AREA)
  • Chemical & Material Sciences (AREA)
  • Mechanical Engineering (AREA)
  • Composite Materials (AREA)
  • Manufacturing & Machinery (AREA)
  • Ceramic Engineering (AREA)
  • Combustion & Propulsion (AREA)
  • Ocean & Marine Engineering (AREA)
  • Laminated Bodies (AREA)

Abstract

A method of moulding a shell-like structure such as a hull of a marine craft, pipe or building comprises stretching reinforcing mesh material 5 over a moulding surface 1a, and applying settable material (e.g. cement or polyester resin) to the mesh material whilst maintaining the latter in tension, using staples 8 driven into a wood strip 4 attached to the mould. Adjustable clamps 7, demountably attached to the ground 2, are used to grip the lower edges of the mesh material 5, so as to stretch the mesh material tightly over the moulding surface 1a. Stretching the mesh material 5 over the moulding surface in this way helps to form the material over any three- dimensional curves in the moulding surface. <IMAGE>

Description

SPECIFICATION Improvements in or relating to moulding This invention relates to moulding.
The invention provides an improved method of manufacturing shell-like structures and has particular application in the manufacture of marine craft such as boats, barges and canoes.
According to the invention, a method of moulding comprises stretching reinforcing mesh material over a moulding surface, and applying settable material to the mesh material whilst maintaining the latter in tension.
The settable material is preferably cementitious but other settable materials such as plastics material may be used, where suitable. One suitable plastics material comprises polyester resin mixed with a filler. When cured, the plastics material has the appearance of cement.
As used herein, the term "mesh material" includes filamentary members subsequently disposed so as to form one or more meshes, as well as pre-formed mesh comprising interconnected filamentary members.
The invention also comprises moulded structures manufactured according to the aforesaid method, for example, marine craft hulls.
An embodiment of the invention will now be described, by way of example only, with reference to the accompanying drawings, wherein: Figures 1 to 5 are end views in cross-section, (Figures 3 and 4 being fragmentary), and illustrate various stages of manufacturing a FerroCement boat. Figure 6 is a fragmentary end view of a modification.
With reference to Figures 1 and 5, a male mould 1 is used to manufacture a FerroCement boat hull 20 (Figure 5).
The mould 1 in this example is of wood, although other suitable materials such as G.R.P. (Glass Reinforced Plastics Material) or FerroCement may be used instead. The mould 1 is supported at a convenient height above the ground 2 by pillars 3. A disposable wood strip 4 is attached, edge-on, to the periphery of the mould 1 and is detachably secured thereto by nails or the like. The exterior of the mould 1 defines a smooth convex moulding surface 1a.
To manufacture the boat hull 20 and with reference to Figure 2, mesh material 5, (formed by criss-crossed steel filamentary members 6), is laid over the moulding surface la.
Adjustable clamps 7, demountably attached to the ground 2, are used to grip the lower edges of the mesh material 5, by way of members 6, so as to stretch the mesh material tightly over the moulding surface la.
Stretching the mesh material 5 over the moulding surface in this way helps to form the material 5 over anythree-dimensional curves in the moulding surface 1a.
Next, the mesh material 5 is secured in place by driving staples 8 into the external face of the wood strip 4. The clamps 7 are now released and successive layers of mesh material are applied, stretched, and secured in the same way, as shown in Figure 3.
If desired, steel reinforcing rods 9 are hooked loosely in place, to be subsequently secured by the final, i.e. outer layer of mesh material 5.
With reference to Figure 4, when the desired number of mesh layers have been applied and stapled in place, excess mesh material is trimmed off and a wooden moulding strip 10 isdemountably attached to the strip 4, (e.g. by nails), so as to extend around the periphery of the mould 1.
The steelwork is now ready for plastering, using, in this example, a cement mortar.
The plastering is proceeded with, whilst the layers of mesh material 5 are maintained in tension by the staples 8.
Figure 5 illustrates the completed hull 20. The hull 20 has the reinforcing steelwork integrally bonded by the mortar, which is trowelled smooth to the moulding strip 10.
After curing, which may or may not be accelerated by the application of heat, the wooden strips 10 and 4 are removed and the hull 20 lifted offthe mould 1, leaving only a line of staples 8 imbedded along the periphery of the hull.
Stapling mesh material at the periphery of the moulding surface avoids the application of staples to the surface itself, and leaves the surface undamaged, so that the mould is immediately available for re-use.
The invention also results in a substantial reduction in production time, compared with other methods.
The invention can be used to manufacture structures other than marine craft, for example, water channels and simple buildings, particularly for use in the underdeveloped countries.
Figure 6 illustrates a modification wherein the hull 20 incorporates built-in stringers (25) and gunwhale members (26). A wider moulding strip (10a) is used when gunwhale members are incorporated.
1. A method of moulding, comprising stretching reinforcing mesh material over a moulding surface, and applying settable material to the mesh material whilst maintaining the latter in tension.
2. A method as claimed in Claim 1, wherein the settable material is cementitious.
3. A method as claimed in Claim 1, wherein the settable material is plastics material.
4. A method as claimed in Claim 3, wherein the plastics material comprises polyester resin mixed with a filler.
5. A moulded structure manufactured according to the method claimed in any one of Claims 1,2,3 or 4.
6. A moulded structure as claimed in Claim 5, comprising a marine craft hull.
7. A method of moulding, substantially as hereinbefore described, with reference to Figures 1 to 5 of the accompanying drawings.
8. A method of moulding, substantially as hereinbefore described, with reference to Figures 1 to 5 of the accompanying drawings, modified sub
**WARNING** end of DESC field may overlap start of CLMS **.

Claims (10)

**WARNING** start of CLMS field may overlap end of DESC **. SPECIFICATION Improvements in or relating to moulding This invention relates to moulding. The invention provides an improved method of manufacturing shell-like structures and has particular application in the manufacture of marine craft such as boats, barges and canoes. According to the invention, a method of moulding comprises stretching reinforcing mesh material over a moulding surface, and applying settable material to the mesh material whilst maintaining the latter in tension. The settable material is preferably cementitious but other settable materials such as plastics material may be used, where suitable. One suitable plastics material comprises polyester resin mixed with a filler. When cured, the plastics material has the appearance of cement. As used herein, the term "mesh material" includes filamentary members subsequently disposed so as to form one or more meshes, as well as pre-formed mesh comprising interconnected filamentary members. The invention also comprises moulded structures manufactured according to the aforesaid method, for example, marine craft hulls. An embodiment of the invention will now be described, by way of example only, with reference to the accompanying drawings, wherein: Figures 1 to 5 are end views in cross-section, (Figures 3 and 4 being fragmentary), and illustrate various stages of manufacturing a FerroCement boat. Figure 6 is a fragmentary end view of a modification. With reference to Figures 1 and 5, a male mould 1 is used to manufacture a FerroCement boat hull 20 (Figure 5). The mould 1 in this example is of wood, although other suitable materials such as G.R.P. (Glass Reinforced Plastics Material) or FerroCement may be used instead. The mould 1 is supported at a convenient height above the ground 2 by pillars 3. A disposable wood strip 4 is attached, edge-on, to the periphery of the mould 1 and is detachably secured thereto by nails or the like. The exterior of the mould 1 defines a smooth convex moulding surface 1a. To manufacture the boat hull 20 and with reference to Figure 2, mesh material 5, (formed by criss-crossed steel filamentary members 6), is laid over the moulding surface la. Adjustable clamps 7, demountably attached to the ground 2, are used to grip the lower edges of the mesh material 5, by way of members 6, so as to stretch the mesh material tightly over the moulding surface la. Stretching the mesh material 5 over the moulding surface in this way helps to form the material 5 over anythree-dimensional curves in the moulding surface 1a. Next, the mesh material 5 is secured in place by driving staples 8 into the external face of the wood strip 4. The clamps 7 are now released and successive layers of mesh material are applied, stretched, and secured in the same way, as shown in Figure 3. If desired, steel reinforcing rods 9 are hooked loosely in place, to be subsequently secured by the final, i.e. outer layer of mesh material 5. With reference to Figure 4, when the desired number of mesh layers have been applied and stapled in place, excess mesh material is trimmed off and a wooden moulding strip 10 isdemountably attached to the strip 4, (e.g. by nails), so as to extend around the periphery of the mould 1. The steelwork is now ready for plastering, using, in this example, a cement mortar. The plastering is proceeded with, whilst the layers of mesh material 5 are maintained in tension by the staples 8. Figure 5 illustrates the completed hull 20. The hull 20 has the reinforcing steelwork integrally bonded by the mortar, which is trowelled smooth to the moulding strip 10. After curing, which may or may not be accelerated by the application of heat, the wooden strips 10 and 4 are removed and the hull 20 lifted offthe mould 1, leaving only a line of staples 8 imbedded along the periphery of the hull. Stapling mesh material at the periphery of the moulding surface avoids the application of staples to the surface itself, and leaves the surface undamaged, so that the mould is immediately available for re-use. The invention also results in a substantial reduction in production time, compared with other methods. The invention can be used to manufacture structures other than marine craft, for example, water channels and simple buildings, particularly for use in the underdeveloped countries. Figure 6 illustrates a modification wherein the hull 20 incorporates built-in stringers (25) and gunwhale members (26). A wider moulding strip (10a) is used when gunwhale members are incorporated. CLAIMS
1. A method of moulding, comprising stretching reinforcing mesh material over a moulding surface, and applying settable material to the mesh material whilst maintaining the latter in tension.
2. A method as claimed in Claim 1, wherein the settable material is cementitious.
3. A method as claimed in Claim 1, wherein the settable material is plastics material.
4. A method as claimed in Claim 3, wherein the plastics material comprises polyester resin mixed with a filler.
5. A moulded structure manufactured according to the method claimed in any one of Claims 1,2,3 or 4.
6. A moulded structure as claimed in Claim 5, comprising a marine craft hull.
7. A method of moulding, substantially as hereinbefore described, with reference to Figures 1 to 5 of the accompanying drawings.
8. A method of moulding, substantially as hereinbefore described, with reference to Figures 1 to 5 of the accompanying drawings, modified sub stantially as hereinbefore described with reference to Figure 6 thereof.
9. A moulded structure, manufactured by the method claimed in Claim 7.
10. A moulded structure, manufactured by the method claimed in Claim 8.
GB8032384A 1979-10-23 1980-10-08 Moulding articles which include embedded mesh-like material Withdrawn GB2061177A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
GB8032384A GB2061177A (en) 1979-10-23 1980-10-08 Moulding articles which include embedded mesh-like material

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
GB7936630 1979-10-23
GB8032384A GB2061177A (en) 1979-10-23 1980-10-08 Moulding articles which include embedded mesh-like material

Publications (1)

Publication Number Publication Date
GB2061177A true GB2061177A (en) 1981-05-13

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GB8032384A Withdrawn GB2061177A (en) 1979-10-23 1980-10-08 Moulding articles which include embedded mesh-like material

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Country Link
GB (1) GB2061177A (en)

Cited By (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2507956A1 (en) * 1981-06-22 1982-12-24 Nava Pier Luigi METHOD AND DEVICE FOR PRODUCING REINFORCED RESIN HOLLOW ELEMENTS, PARTICULARLY PROTECTIVE HELMETS, AND COMPONENTS THUS OBTAINED
GB2145749A (en) * 1983-08-23 1985-04-03 Lamberg Ind Res Ass Fabric reinforced cement structure
FR2553712A1 (en) * 1983-10-24 1985-04-26 Dab Ind Inc METHOD AND APPARATUS FOR MANUFACTURING A FILAMENT REINFORCING COMPOSITE STRIP, FOR TRANSMISSION AND BRAKING MECHANISM
WO1987003534A1 (en) * 1985-12-12 1987-06-18 Keith Stewart Reinforced articles and method of their manufacture by means of inflatable moulds
WO2009071331A3 (en) * 2007-12-06 2009-09-11 Airbus Deutschland Gmbh Method for the production of a fiber-reinforced composite preform from a laminate, having at least two prepreg layers, and production device for such a method
DE102008046006A1 (en) * 2008-09-05 2010-03-11 SGL Kümpers GmbH & Co.KG Belt-like composite material manufacturing method for rotor blade of wind turbine, involves covering thread filament for complete soaking of stretched filament and concluding consolidation of composite material by resin infusion process
WO2010118858A1 (en) * 2009-04-14 2010-10-21 Airbus Operations Gmbh Apparatus and method for draping knitted fiber fabrics for curved profiled structural parts of fiber composite material
ITGO20090004A1 (en) * 2009-06-19 2010-12-20 Paolo Sansoni PROCEDURE FOR IMPLEMENTING OR COMPLETING STRUCTURES FROM THE OUTSIDE TO THE OUTSIDE

Cited By (15)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2507956A1 (en) * 1981-06-22 1982-12-24 Nava Pier Luigi METHOD AND DEVICE FOR PRODUCING REINFORCED RESIN HOLLOW ELEMENTS, PARTICULARLY PROTECTIVE HELMETS, AND COMPONENTS THUS OBTAINED
GB2145749A (en) * 1983-08-23 1985-04-03 Lamberg Ind Res Ass Fabric reinforced cement structure
FR2553712A1 (en) * 1983-10-24 1985-04-26 Dab Ind Inc METHOD AND APPARATUS FOR MANUFACTURING A FILAMENT REINFORCING COMPOSITE STRIP, FOR TRANSMISSION AND BRAKING MECHANISM
WO1987003534A1 (en) * 1985-12-12 1987-06-18 Keith Stewart Reinforced articles and method of their manufacture by means of inflatable moulds
US8454876B2 (en) 2007-12-06 2013-06-04 Airbus Operations Gmbh Method for manufacturing an FC parison out of a laminate with at least two prepreg layers as well as a manufacturing device for such a method
WO2009071331A3 (en) * 2007-12-06 2009-09-11 Airbus Deutschland Gmbh Method for the production of a fiber-reinforced composite preform from a laminate, having at least two prepreg layers, and production device for such a method
RU2508199C2 (en) * 2007-12-06 2014-02-27 Эрбус Оперейшнс Гмбх Method of semi-finished product fabrication from esm laminate with two prepreg layers and process unit to this end
DE102008046006A1 (en) * 2008-09-05 2010-03-11 SGL Kümpers GmbH & Co.KG Belt-like composite material manufacturing method for rotor blade of wind turbine, involves covering thread filament for complete soaking of stretched filament and concluding consolidation of composite material by resin infusion process
WO2010118858A1 (en) * 2009-04-14 2010-10-21 Airbus Operations Gmbh Apparatus and method for draping knitted fiber fabrics for curved profiled structural parts of fiber composite material
US20120090768A1 (en) * 2009-04-14 2012-04-19 Airbus Operations Gmbh Apparatus and method for draping knitted fiber fabrics for curved profiled structural parts of fiber composite material
CN102395459A (en) * 2009-04-14 2012-03-28 空中客车作业有限公司 Apparatus and method for draping knitted fiber fabrics for curved profiled structural parts of fiber composite material
CN102395459B (en) * 2009-04-14 2015-05-27 空中客车作业有限公司 Apparatus and method for draping knitted fiber fabrics for curved profiled structural parts of fiber composite material
US20180200966A1 (en) * 2009-04-14 2018-07-19 Airbus Operations Gmbh Apparatus and method for draping knitted fiber fabrics for curved profiled structural parts of fiber composite material
US10668671B2 (en) * 2009-04-14 2020-06-02 Airbus Operations Gmbh Apparatus and method for draping knitted fiber fabrics for curved profiled structural parts of fiber composite material
ITGO20090004A1 (en) * 2009-06-19 2010-12-20 Paolo Sansoni PROCEDURE FOR IMPLEMENTING OR COMPLETING STRUCTURES FROM THE OUTSIDE TO THE OUTSIDE

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