US3794203A - Thermoplastic lined hollow metal bodies and method - Google Patents

Thermoplastic lined hollow metal bodies and method Download PDF

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Publication number
US3794203A
US3794203A US00073446A US3794203DA US3794203A US 3794203 A US3794203 A US 3794203A US 00073446 A US00073446 A US 00073446A US 3794203D A US3794203D A US 3794203DA US 3794203 A US3794203 A US 3794203A
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US
United States
Prior art keywords
sheet
metal
vacuum
thermoplastic
thermoplastic sheet
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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.)
Expired - Lifetime
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US00073446A
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English (en)
Inventor
B Baumann
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.)
Cegedur Societe de Transformation de lAluminium Pechiney SA
Original Assignee
Cegedur Societe de Transformation de lAluminium Pechiney SA
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Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B32—LAYERED PRODUCTS
    • B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
    • B32B1/00—Layered products having a non-planar 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
    • B29C51/00—Shaping by thermoforming, i.e. shaping sheets or sheet like preforms after heating, e.g. shaping sheets in matched moulds or by deep-drawing; Apparatus therefor
    • B29C51/12—Shaping by thermoforming, i.e. shaping sheets or sheet like preforms after heating, e.g. shaping sheets in matched moulds or by deep-drawing; Apparatus therefor of articles having inserts or reinforcements
    • 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
    • B29C51/00—Shaping by thermoforming, i.e. shaping sheets or sheet like preforms after heating, e.g. shaping sheets in matched moulds or by deep-drawing; Apparatus therefor
    • B29C51/16—Lining or labelling
    • 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
    • B29C51/00—Shaping by thermoforming, i.e. shaping sheets or sheet like preforms after heating, e.g. shaping sheets in matched moulds or by deep-drawing; Apparatus therefor
    • B29C51/16—Lining or labelling
    • B29C51/162—Lining or labelling of deep containers or boxes
    • 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
    • B29C51/00—Shaping by thermoforming, i.e. shaping sheets or sheet like preforms after heating, e.g. shaping sheets in matched moulds or by deep-drawing; Apparatus therefor
    • B29C51/26—Component parts, details or accessories; Auxiliary operations
    • B29C51/30—Moulds
    • B29C51/36—Moulds specially adapted for vacuum forming, Manufacture thereof
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B32—LAYERED PRODUCTS
    • B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
    • B32B15/00—Layered products comprising a layer of metal
    • B32B15/04—Layered products comprising a layer of metal comprising metal as the main or only constituent of a layer, which is next to another layer of the same or of a different material
    • B32B15/08—Layered products comprising a layer of metal comprising metal as the main or only constituent of a layer, which is next to another layer of the same or of a different material of synthetic resin
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B32—LAYERED PRODUCTS
    • B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
    • B32B38/00—Ancillary operations in connection with laminating processes
    • B32B38/18—Handling of layers or the laminate
    • B32B38/1858—Handling of layers or the laminate using vacuum

Definitions

  • ABSTRACT Fuel tank and other hollow metal bodies internally lined with a thermoplastic material wherein a heated sheet of the thermoplastic material is laid over the previously formed hollow metal body with the plastic sheet in engagement with the edge of said body and the sheet is deformed to correspond to the internal shape of said body by drawing a vacuum through a foraminous vacuum tubing-which remains entrapped between said sheet and body to become a part thereof and which includes the addition of porous and perme- .able bodies connected to the vacuum system for for- Qmation of said sheet liner with sections which extend from the metal body, and fuel tanks formed by the joinder of such lined body portions in sealed relation along the meeting edges of the plastic lining.
  • This invention relates to metal bodies internally lined with thermoplastic film or sheet material and to the method for producing same and more particularly to fuel tanks or other hollow bodies produced by same.
  • the invention is of particular interest to the art of forming plastic materials to desired shapes and to containers for shipment by rail, truck, river or boat.
  • This method is encumbered by the need to drill vacuum opening with coresponding weakening of the metal component, increase in cost of production, and reduction in esthetic appearance.
  • FIG. I is a sectional elevational view of a sheet of thermoplastic material of the type employed in the practice of this invention.
  • FIG. 2 is a sectional elevational view of an intermediate porous and permeable body
  • FIG. 3 is a sectional elevational view of an assembly of a shaped metal body with the elements of FIGS. 1 and 2;
  • FIG. 14 is a sectional elevational view of a semi-tank I in which the plastic sheet is improved by hooping;
  • FIG. 15 is a sectional elevational view of a hollow body'prepared in accordance with the practice of this invention in which the vacuum tube is in the form of a porous mass;
  • FIG. 16 is a plan view of the body'shown in FIG. 15;
  • FIG. 17 is a sectional elevational view of another embodiment of a device embodying features of this invention.
  • the shaped metal body is first formed, a plastic sheet is placed on said body and deformed by heat in response to a vacuum provided in the space between both elements by means of a disposable vacuum tube with lateral openings located between both elements.
  • thermoplastic sheet In a particular embodiment of this invention whereby it becomes possible to obtain positive stamping elements of the thermoplastic sheet, at least one intermediate porous and permeable body, such as a drilled profile or a block of thermosetting foam with open pores,
  • the hollow body shown in FIG. 3 is obtained by stamping or molding a metal sheet to the shape of the hollow body 2.
  • the hollow body is spanned by a preheated thermoplastic sheet 1, such as polyethylane, which engages the edges 21 of the hollow body after which a vacuum is drawn between the sheet 1 and the hollow metal body 2.
  • FIG. 4 is a sectional view taken along the line A'--A of FIG. 5;
  • FIG. 5 is a plan view of a vacuum tube employed in the practice of this invention
  • FIG. 6 is a sectional elevational view of a portion of the assembly showing the vacuum tube located in a groove in the hollow metal-body;
  • FIG. 7 is a sectional elevational view of a fuel tank prepared in accordance with the practice of this invention.
  • FIG. 10 is a top plan view of the formed sheet of FIG. 8
  • FIG. 12 is a cross section of the sheet shown in FIG. 11;
  • thermoplastic layer 10 lining the metal body.
  • the sheet 1 or the inner surface of the hollow body or both may be coated with an adhesive to effect interbonding of the adjacent surfaces as the sheet is drawn into contact with the inner surfaces of the hollow metal body. Use is no longer made of the vacuum tube 3 since it becomes a part of the final assembly.
  • the side wall 22 of the hollow body has acertain skin,- while the opposite wall 23 is formed with two zones, including a lower zone 231 which has no skin and an upper Zone 232 which has a mer having open pores, a metal profile, or a perforate plastic material. In the latter cases, the profile itself may form a branch of the vacuum tube.
  • thermoplastic sheet When the vacuum is drawn through tube 3, the thermoplastic sheet is deformed and drawn to form the positive member 12 about the intermediate body 35.
  • the vacuum tube 3 may be of various types. It can be circular in cross section, as shown in FIG. 3, or rectangular as shown in FIG. 6, or it can have a flattened portion with internal grooves 32 which prevent collapse, as shown in FIGS. 4 and 5, or it can be formed with curved surfaces.
  • the tube can be fabricated of rigid or flexible metal or plastic tubing.
  • the tube may be formed with channels 33 into which the thermoplastic sheet 1 can penetrate. Further, it can have a plane surface 30 which is coatable with an adhesive 301, protected by a removable cover sheet 302, by virtue of the channeling 33, when this tube is laid.
  • the tank comprises a lower member 4 and an upper member 5.
  • the lower member comprises a metal shell 401 formed, as by stamping to the desired shape, a thermoplastic sheet 402, such as a high density polyethylene, heatshaped therein by means of vacuum tubes 41 comprising one or several connections 41 1 with at least one vacuum source.
  • a thermoplastic sheet 402 such as a high density polyethylene, heatshaped therein by means of vacuum tubes 41 comprising one or several connections 41 1 with at least one vacuum source.
  • Rigidification or stiffening members 42 are provided where the plastic is joined with the metal, and stiffening members 43 where the plastic is separated from the metal by an intermediate body 431 ofplastic foam having connected pores.
  • the upper member may or may not be symmetrical in some details, with the lower shell. It also comprises a metal shell 501 in which a thermoplastic sheet 502 is heat-shaped by means of vacuum tubes 51 comprising one or several fittings 511 communicating with at least one vacuum source. stiffening members 52 are pro- I vided and placed into the extension of the members 42.
  • the members 4 and include a'number of accessories.
  • the lower member 4 embodies the drainage tube 44 serving as a sump, the emergency fuel tank 45 separated by a plastic wall 451 formed in the thermoplastic sheet 402 at the time of the deformation under the effect of the vacuum, thanks to a porous member with communicating pores (not shown), a lower part 46 in the form of a tranquilization vat, separated by a wall 461.
  • the tubes 541 and 551 are introduced after having fastened the screen 552 which comprises a tapered top 5521 that facilitates the introduction of the tube 551. Both members are then brought together with contact first on the surface of the plastic joint 404-504, then, after welding or gluing, according to the latter,on the level of the metal joint 403503, which is welded in turn.
  • This tank combines the advantages of the metal shell with those resulting from the presence of the thermoplastic coating, i.e., good mechanical characteristics (resistance to traction, compression, bending and singing), temperature resistance, thus easy evacuation of the heat, tightness with regard to gases, resistance to abrasion, ease of stamping under vacuum, sound and heat insulation, and resistance to corrosion.
  • the entire tank assembly is of remarkable light weight.
  • the tank is formed, as explained above, by assembly of two members 6 and 7 with the open ends against each other.
  • the bottom of each of these members is bent, as shown for the bottom 61 of the member 6, so as to be concave on the outside.
  • a plot or wall, such as 62 is provided, the upper end 621 of which extends beyond the upper surface 60.
  • the vacuum tube is formed of a mass of foamed plastic in which the pores communicate at least in the direction of the progression of the vacuum.
  • This foam obtained by grinding or cutting from larger blocks, can be reinforced by fibers, for example by non-flammable threads, glass fibers or wires.
  • a metal member 91 is double-walled by a thermoplastic sheet 92 deformed under the action of the vacuum originating from the passage 911 and transmitted through the porous foam network and interlayer 93.
  • FIG. 16 illustrates how the sheet 92 can embrace even the most complicated details of the metal part, although the latter does not inelude a porous foam interlayer.
  • the vacuum is established slowly and progressively, but its action on the thermoplastic sheet is complete.
  • the foam used includes a surface skin, it is suitable to effect the drilling of this skin mechanically to provide communica tion with the interior or body portion of the foam.
  • the porous foam takes up only a small space 931 in contact with the vacuum source 911.
  • the thermoplastic sheet is in contact with the metal member 91, both in the distal zone of the foam 931 and in the proximal zone of this foamv
  • the porous mass may even be located outside the volume 90 present between the metal member 91 and the thermo-plastic sheet 921 prior to its deformation as shown in FIG. 18.
  • the metal member 91 is then placed to form a joint on a support 94 made of natural or synthetic rubber, for example, wherein, below the passage of the vacuum 911, an opening is provided in the member 91 receiving the porous mass 932, surrounded by a sleeve 941, and positioned against the member 91 by a joint 942.
  • Inserts such as 95, which may or may not be porous, may be placed into the space 90 to allow the sheet 921, after heat-shaping, to assume a shape different from that of the member 91.
  • the sheet 921 is applied to the support 94 by means of a blankholder 943.
  • a fuel tank comprising a lower member formed of a metal shell defining side and bottom walls, and being internally lined with a thermoplastic sheet, a vacuum tube trapped between the thermoplastic sheet and the metal shell, an upper member formed of a metal shell defining side and bottom walls, and being internally lined with a thermoplastic sheet, and a vacuum tube entrapped between the thermoplastic sheet and the metal shell of said upper member, said members being joined one to the other along their.
  • each of the shell members being formed to concave shape
  • each shell member being provided with an aligned intermediate wall extendng outwardly away from said bottom portions, the outer ends of said intermediate walls extending beyond the plane defined by said open end edges of said shells whereby, when the open ends of the shells are joined, said outer ends of said intermediate walls engage each other causing the walls to exert a stress which causes hooping of the plastic sheet by the metal.

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  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Manufacturing & Machinery (AREA)
  • Blow-Moulding Or Thermoforming Of Plastics Or The Like (AREA)
  • Laminated Bodies (AREA)
  • Body Structure For Vehicles (AREA)
  • Lining Or Joining Of Plastics Or The Like (AREA)
US00073446A 1969-09-18 1970-09-18 Thermoplastic lined hollow metal bodies and method Expired - Lifetime US3794203A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
FR6931788A FR2058621A5 (de) 1969-09-18 1969-09-18

Publications (1)

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US3794203A true US3794203A (en) 1974-02-26

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US00073446A Expired - Lifetime US3794203A (en) 1969-09-18 1970-09-18 Thermoplastic lined hollow metal bodies and method

Country Status (5)

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US (1) US3794203A (de)
DE (1) DE2046013C3 (de)
ES (1) ES383724A1 (de)
FR (1) FR2058621A5 (de)
GB (1) GB1305804A (de)

Cited By (12)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3912107A (en) * 1971-04-26 1975-10-14 Cegedur Mobile liquid storage tanks
US4432180A (en) * 1980-12-10 1984-02-21 Dyar Harrison G Thermal insulating system particularly adapted for building construction
US4454697A (en) * 1980-12-10 1984-06-19 Dyar Harrison G Thermal insulating system particularly adapted for building construction
US4518091A (en) * 1979-12-12 1985-05-21 Daimler-Benz Aktiengesellschaft Motor vehicle fuel tank
US4525969A (en) * 1980-12-10 1985-07-02 Dyar Harrison G Thermal insulating system particularly adapted for building construction
US5850933A (en) * 1991-09-17 1998-12-22 Pazik; John A. Molded gas tank with internal baffle
US20050284872A1 (en) * 2000-04-03 2005-12-29 Inergy Automotive Systems Research (Societe Anonyme) Method of manufacturing a tank of thermoplastic material including a portion in relief for mounting an attachment, and a tank manufactured thereby
US20060060169A1 (en) * 2004-09-21 2006-03-23 Adam Leslie Fuel tank for a vehicle
US20100200700A1 (en) * 2007-10-19 2010-08-12 Airbus Operations Limited Tanks for contaning a fluid within a chamber
CN102105320A (zh) * 2008-08-06 2011-06-22 阿卢泰克有限公司 用于汽车的工作流体的箱体
FR2997892A1 (fr) * 2012-11-14 2014-05-16 Visteon Global Tech Inc Procede de fabrication d'une piece plastique munie d'au moins une empreinte coloree
US20190009233A1 (en) * 2016-01-19 2019-01-10 Ehud FURMAN Internal shield system for fluids and solids processing devices and uses thereof

Families Citing this family (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE2916844A1 (de) * 1979-04-26 1980-11-06 Daimler Benz Ag Verfahren zur herstellung von unterdruckbehaeltern und unterdruckbehaelter fuer kraftfahrzeuge
DE8031200U1 (de) * 1980-11-24 1981-04-02 Arts und Specials Kunsthandelsgesellschaft mbH, 7000 Stuttgart Pass-wannen-einsatz fuer badewannen, duschbecken und waschrinnen
FR2495545A1 (fr) * 1980-12-05 1982-06-11 Goodyear Aerospace Corp Materiau composite renforce de tissu pour reservoir a parois souples et procede de fabrication de ce reservoir
DE3108571C2 (de) * 1981-03-06 1985-08-29 Paul Kiefel Gmbh, 8228 Freilassing Verfahren zum Herstellen eines aus einem Träger und aus einer auf dem Träger angeordneten Deckschicht bestehenden Verbundkörpers sowie Vorrichtung zur Durchführung des Verfahrens
DE3629530A1 (de) * 1986-09-01 1988-03-10 Schuetz Werke Gmbh Co Kg Verfahren zur herstellung eines surfsegelbrettes

Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US1748138A (en) * 1927-02-10 1930-02-25 American Car & Foundry Co Container for liquids or gases under pressure and method of making the same
US3068561A (en) * 1957-11-20 1962-12-18 Wayne W Jones Method of installing a flexible tank liner
US3383026A (en) * 1965-06-17 1968-05-14 Fmc Corp Lined container

Patent Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US1748138A (en) * 1927-02-10 1930-02-25 American Car & Foundry Co Container for liquids or gases under pressure and method of making the same
US3068561A (en) * 1957-11-20 1962-12-18 Wayne W Jones Method of installing a flexible tank liner
US3383026A (en) * 1965-06-17 1968-05-14 Fmc Corp Lined container

Cited By (15)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3912107A (en) * 1971-04-26 1975-10-14 Cegedur Mobile liquid storage tanks
US4518091A (en) * 1979-12-12 1985-05-21 Daimler-Benz Aktiengesellschaft Motor vehicle fuel tank
US4432180A (en) * 1980-12-10 1984-02-21 Dyar Harrison G Thermal insulating system particularly adapted for building construction
US4454697A (en) * 1980-12-10 1984-06-19 Dyar Harrison G Thermal insulating system particularly adapted for building construction
US4525969A (en) * 1980-12-10 1985-07-02 Dyar Harrison G Thermal insulating system particularly adapted for building construction
US5850933A (en) * 1991-09-17 1998-12-22 Pazik; John A. Molded gas tank with internal baffle
US20050284872A1 (en) * 2000-04-03 2005-12-29 Inergy Automotive Systems Research (Societe Anonyme) Method of manufacturing a tank of thermoplastic material including a portion in relief for mounting an attachment, and a tank manufactured thereby
US20060060169A1 (en) * 2004-09-21 2006-03-23 Adam Leslie Fuel tank for a vehicle
US20100200700A1 (en) * 2007-10-19 2010-08-12 Airbus Operations Limited Tanks for contaning a fluid within a chamber
US8881924B2 (en) * 2007-10-19 2014-11-11 Airbus Operations Limited Tanks for containing a fluid within a chamber
CN102105320A (zh) * 2008-08-06 2011-06-22 阿卢泰克有限公司 用于汽车的工作流体的箱体
US20110179776A1 (en) * 2008-08-06 2011-07-28 Alutech Gesellschaft M.B.H. Tank for Working Fluids of Motor Vehicles
FR2997892A1 (fr) * 2012-11-14 2014-05-16 Visteon Global Tech Inc Procede de fabrication d'une piece plastique munie d'au moins une empreinte coloree
US20190009233A1 (en) * 2016-01-19 2019-01-10 Ehud FURMAN Internal shield system for fluids and solids processing devices and uses thereof
US11110418B2 (en) * 2016-01-19 2021-09-07 Kiinns Foodtech Ltd. Internal shield system for fluids and solids processing devices and uses thereof

Also Published As

Publication number Publication date
GB1305804A (de) 1973-02-07
DE2046013C3 (de) 1973-09-20
FR2058621A5 (de) 1971-05-28
ES383724A1 (es) 1974-06-01
DE2046013A1 (de) 1971-04-15
DE2046013B2 (de) 1973-03-01

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