US3334398A - Fabrication of hollow articles - Google Patents

Fabrication of hollow articles Download PDF

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Publication number
US3334398A
US3334398A US408304A US40830464A US3334398A US 3334398 A US3334398 A US 3334398A US 408304 A US408304 A US 408304A US 40830464 A US40830464 A US 40830464A US 3334398 A US3334398 A US 3334398A
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US
United States
Prior art keywords
blank
pattern
sheets
pressure
unjoined
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.)
Expired - Lifetime
Application number
US408304A
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English (en)
Inventor
Verne L Middleton
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.)
Olin Corp
Original Assignee
Olin Corp
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 Olin Corp filed Critical Olin Corp
Priority to US408304A priority Critical patent/US3334398A/en
Priority to NO160191A priority patent/NO122476B/no
Priority to GB44888/65A priority patent/GB1119191A/en
Priority to BR174430/65A priority patent/BR6574430D0/pt
Priority to DE1479560A priority patent/DE1479560C3/de
Priority to DE19651753860 priority patent/DE1753860A1/de
Application granted granted Critical
Publication of US3334398A publication Critical patent/US3334398A/en
Anticipated expiration legal-status Critical
Expired - Lifetime 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
    • B29C66/00—General aspects of processes or apparatus for joining preformed parts
    • B29C66/004—Preventing sticking together, e.g. of some areas of the parts to be joined
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
    • B21D—WORKING OR PROCESSING OF SHEET METAL OR METAL TUBES, RODS OR PROFILES WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
    • B21D53/00—Making other particular articles
    • B21D53/02—Making other particular articles heat exchangers or parts thereof, e.g. radiators, condensers fins, headers
    • B21D53/04—Making other particular articles heat exchangers or parts thereof, e.g. radiators, condensers fins, headers of sheet metal
    • B21D53/045—Making other particular articles heat exchangers or parts thereof, e.g. radiators, condensers fins, headers of sheet metal by inflating partially united plates
    • 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
    • B29C49/00—Blow-moulding, i.e. blowing a preform or parison to a desired shape within a mould; Apparatus therefor
    • B29C49/02—Combined blow-moulding and manufacture of the preform or the parison
    • B29C49/06905—Using combined techniques for making the preform
    • B29C49/0691—Using combined techniques for making the preform using sheet like material, e.g. sheet blow-moulding from joined sheets
    • 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
    • B29C65/00—Joining or sealing of preformed parts, e.g. welding of plastics materials; Apparatus therefor
    • B29C65/02—Joining or sealing of preformed parts, e.g. welding of plastics materials; Apparatus therefor by heating, with or without pressure
    • 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
    • B29C66/00—General aspects of processes or apparatus for joining preformed parts
    • B29C66/80—General aspects of machine operations or constructions and parts thereof
    • B29C66/83—General aspects of machine operations or constructions and parts thereof characterised by the movement of the joining or pressing tools
    • B29C66/834—General aspects of machine operations or constructions and parts thereof characterised by the movement of the joining or pressing tools moving with the parts to be joined
    • B29C66/8341—Roller, cylinder or drum types; Band or belt types; Ball types
    • B29C66/83411—Roller, cylinder or drum types
    • B29C66/83413—Roller, cylinder or drum types cooperating rollers, cylinders or drums
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
    • Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
    • Y10T29/00—Metal working
    • Y10T29/49—Method of mechanical manufacture
    • Y10T29/4935—Heat exchanger or boiler making
    • Y10T29/49366—Sheet joined to sheet
    • Y10T29/49369—Utilizing bond inhibiting material
    • Y10T29/49371—Utilizing bond inhibiting material with subsequent fluid expansion

Definitions

  • This invention is directed primarily to the expansion of metal panels from blanks fabricated with an unjoined interior portion, but the invention is equally applicable to similar panels fabricated from materials other than metal, such as various plastics, and to panels fabricated from dissimilar materials such as metal and a plastic joined together with an unjoined portion between the sheets.
  • a pattern of weld-inhibiting material is applied to a clean surface of a sheet of metal.
  • a clean surface of a second sheet of metal is superimposed on this surface and the two sheets are secured to prevent relative movement between each other and then pressure-welded together, as by hot rolling, in their adjacent areas which are not separated by the weld-inhibiting material.
  • Hot rolling of the sheets results in reducing the thickness of the two sheets and elongating the resultant blank in the direction of rolling while the width of the resultant blank remains substantially the same as the initial width of the sheets..
  • the resultant blank can be softened as by annealing to make it more.
  • weld-inhibiting material results in an unjoined portion of a pattern of laminations between the outer faces of the pressure-Welded blank. Any time after pressure-welding of the blank, and preferably after softening by annealing, the unjoined portion or pattern of laminations is distended by injecting therein a fluid pressure of suflicient magnitude to permanently expand the blank in the area of the unjoined portion or pattern of laminations to form a desired corresponding system of passageways.
  • Such a process may be employed to produce panels having expanded passageways on only one side or on both sides, as is now Well known in theart.
  • This invention relates to the fabrication of panels ⁇ known in the art as one-side-at-that ⁇ is, having expanded passageways on only one side-or to those known as modied-one-sideflat-that is, those having expanded passageways on one side which are of a degree of expansion relatively minorV relative to the expansion of the passageways on the other side ⁇ l
  • One conventional method of expanding a blank comprises subjecting the blank to external confinement between at least one rigid die member and a body of fluid, under pressure, applied externally to only one side of the blank.
  • One of the rigid die members is in the form of a press platen with a suitably shaped die surface, such as a flat one in particular, on one side of the blank while a fluidpreferably compressed air, although a suitable incompressible liquid such as water, oil or the like may be employedacts on the other side of the blank so as to constrain it between the die surface and the fluid during the applica- Patented Aug. 8, 1967 tion of a blank-expanding fluid pressure injected internally of the blank into the unjoined portion or pattern of laminations.
  • This fluid acting externally of the blank may be contained within a recess or cavity in a second rigid die member to act in conjunction therewith to control the height and the shape of the expanded portions of the blank.
  • the recess which is of a depth corresponding to the final height of the distension desired in the expanded portions of the blank, may be achieved either by providing a recess in the second die member or by spacing the blank above the second die member, as by a rubber seal.
  • Conventional apparatus for expanding such blanks thus comprises: An expansion press having a at movable platen and a stationary platen having a pan-like holding pressure cavity into which one side of a panel is to be expanded; a sealing ring encircling the operative portion of the cavity into which the panel expands; and a hydraulicv clampthe panel between the platens and thereby place oneV face of the panel in cavity-sealing engagement with the sealing ring and in position for expansion into the cavity; introducing a holding fluid into the cavity under pressure, say 1,000 p.s.i., to force the panel into face-to-face engagement -with the platen; introducing a hydraulic expansion fluid under pressure, say 3,000 p.s.i., into the unwelded passageway-forming system of said panel to expand the passageway walls of its lower face downwardly into the cavity; simultaneously releasing said hydraulic holding and expansion pressures; opening the press; and then removing the expanded panel.
  • the present invention comprehends complete elimina- Y tion of the standard rubber seal, or at least a major reduction in the extent of seal employed, by initial inflation of a peripheral tube of the blank. Conta-ct of the tube with a restraining means provides the pressure seal here,- tofore achieved by use of particular dies and rubber sealing rings or the like.
  • .,lIt is a still further object of this invention to provide a novel blank to be employed in Ithe improved methodV of fabricating hollow articles.
  • FIGURE 1 is a perspective view of a sheet of metal having a pattern of weld-inhibiting material applied to a surface thereof.
  • FIGURE 2 is a schematic perspective view of the ⁇ sheet as shown in FIGURE 1 having superimposed thereon a second sheet of meta-l with the pattern of weldinhibiting material sandwiched between the sheets and showing the sheets being welded together while passed through a pair of mill rolls.
  • FIGURE 3 is a Icross-sectional view through one form of blank to be employed in the instant invention, showing the sheet having the pattern of weld-inhibiting material.
  • FIGURE 4 is a View simil-ar to FIGURE 3 showing a second form of blank, with a portion of the superimposed sheet shown in place.
  • lFIGURE is a sectional view showing the blank of this invention in a first step of production.
  • FIGURE 6 is a View similar to FIGURE 5 showing a second step of production.
  • FIGURES 1 and 2 illustrate t-he fabrication of blanks by the Roll-Bond process.
  • FIG- URE 1 illustrates a sheet of metal 1 having applied to a clean surface 2 thereof a pattern of weld-inhibiting material 3.
  • FIGURE 2 shows the sheet 1 having superimposed thereon a second sheet 4 with the pattern of weld-inhibiting material 3 sandwiched between the sheets.
  • the sheets 1 and 4 are tacked together as by spot-welds 5 to prevent relative slippage between the sheets as they are subsequently welded together by passing through a pai-r of mill rolls 6 to form a blank 7.
  • the sheets 1 and 4 be heated prior to passing through the mill rolls to assure lthat they weld to each other in keeping with techniques well known in the rolling art.
  • the sheets 1 and 4 are separated by ythe weld-inhibiting pattern 3 resulting in an Aunjoined portion as for example the pattern shown in FIGURE l.
  • This restrictor portion is formed 4when the blank is assembled from the sheets 1 and 4; when lthe pattern of weld-inhibiting material 9 is applied to the sheet 1 a stencil pattern is employed in order to form a reduced portion in the weldinhibiting material.
  • This narrowed portion is pre-calculated to provide Ithe pressure-restricting function, to be discussed hereinafter. It will be evident that a second sheet is to be superimposed on the sheet 8, in the manner indicated hereinbefore.
  • FIGURE 4 ya second form of blank is shown comprising la sheet 16 having thereon a firs-t pattern 17 and a second pattern 18 of weld-inhibiting material.
  • the first pattern 17 extends around the periphery ⁇ of the sheet 16 and encompasses the pattern 1'8- which, like the pattern 113' of FIGURE 3, may take any desired configuration.
  • Each of the patterns 17 and 18 extend from an outer edge of the sheet 16, as at 19 and 20 respectively, about the blank, and thence returning to an outer edge as at 21 and 22.
  • a second sheet, a portion of which is shown at the upper portion of FIG- URE 4, is superimposed on the sheet 16 in the manner indicated hereinbefore. For reasons to be indicated shortly, a rubber seal 23 is placed on the completed blank across the patterns 17 and 18 near the terminal portions thereof.
  • FIGURES 5 and 6 the subsequent inflation of either of the blanks of this invention.
  • the inflation of the second embodiment las depicted in FIGURES 5 and 6 is identical to that for the first embodiment, only the latter will be described, it being understood that 4, references -to the blank 8, the first pattern 12, and the second pattern 13 are equally applicable to their analogous struct-ure blank 16, first pattern 17, and second pattern 18, respectively.
  • the blank 8 is first placed on the flat surface of a first platen 24 of a suitable press.
  • the second platen 25 is next lowered to a height corresponding to the desired distension of the finished hollow article.
  • the first pattern 12 is then expanded by suitable application of internal pres-sure in the well-known manner. This pressure is of a degree higher than the subsequently-applied holding pressure, for reasons to be noted.
  • the second pattern 13 remains unexpanded.
  • the internal pressure is introduced through the inlet 10 and thence into the pattern 12.
  • the pattern 13 will not inflate at the initial introduction of pressure as such pressure is below that required to crack the restrictor portion 15.
  • the internal pressure is introduced at 19 and only the pattern 17 infiates, as the patterns 17 and 18 are not in communication in this embodiment.
  • Proper inflation of the pattern 12 into flush engagement with the platen 25 provides a pressure-tight yseal for the volume between the blank 8 and the platen 25, this volume being designated generally as 26.
  • Pressure is introduced into the volume 26, in a manner obvious to those skilled in the art, for instance, through conduit means 37, which may be termed the holding pressure, and thus secures the blank 8 to the platen 24 andby proper regulation in the Iwell-known mannercontrols the subsequent distension of the pattern 13.
  • a modifiedone-side-flat may be produced by appropriately lowering the holding pressure, which allows a controlled amount of distension on the face of the blank in contact with the platen 24.
  • a higher holding pressure is possible than in the prior art devices, for the reason that the internal pressure inflating the pattern 12 may be materially higher than the holding pressure and hence provide a more positive seal unattainable by the prior art rubber seals.
  • FIGURE 6 The subsequent distension is shown in FIGURE 6, wherein the pattern 13 has been inflated by application of suitable distending internal pressure.
  • the restrictor portion 15 cracks at the design pressure, and the pressure introduced at 10 extends through the pattern 13.
  • the pressure required to crack the restrictor portion is contingent upon its crosssectional area, which is calculated commensurate with the proper decompression rate.
  • the restrictor portion 15 may be designed so as to crack within the range of L200-1,800 p.s.i.
  • a control valve at 27 seals the inflated pattern 17, which is closed off at its opposite end 22, and automatically control valve 28 introduces inflation pressure to pattern 18, which is closed off at its opposite end 21.
  • the peripheral pattern 17 does not extend entirely around the pattern 18, and hence it is necessary to provide a short rubber seal 23 to provide the required seal at the area where pattern 17 does not encompass pattern 18.
  • the entire system may be decompressed.
  • the inflated blank of FIGURE 3 will decompress through restrictor tube 15 and inlet 10 to atmosphere, and the blank of FIGURE 4 through control valves 27, 28.
  • the inflated blank is removed, the pattern 12 is cut oil and discarded, and the resulting blank with pattern 13 may be further processed commensurate with its intended use.
  • a blank for producing an article having a desired Syste-m of internal tubular hollows comprising:

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  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Manufacturing & Machinery (AREA)
  • Shaping Metal By Deep-Drawing, Or The Like (AREA)
  • Heat-Exchange Devices With Radiators And Conduit Assemblies (AREA)
  • Actuator (AREA)
  • Tires In General (AREA)
US408304A 1964-11-02 1964-11-02 Fabrication of hollow articles Expired - Lifetime US3334398A (en)

Priority Applications (6)

Application Number Priority Date Filing Date Title
US408304A US3334398A (en) 1964-11-02 1964-11-02 Fabrication of hollow articles
NO160191A NO122476B (pt) 1964-11-02 1965-10-22
GB44888/65A GB1119191A (en) 1964-11-02 1965-10-22 Fabrication of hollow articles
BR174430/65A BR6574430D0 (pt) 1964-11-02 1965-10-29 Fabricacao de artigos ocos
DE1479560A DE1479560C3 (de) 1964-11-02 1965-11-02 Verfahren zum Herstellen eines ein Kanalsystem enthaltenden Verbundkörpers, insbesondere eines Wärmetauschers
DE19651753860 DE1753860A1 (de) 1964-11-02 1965-11-02 Verfahren zum herstellen eines ein kanalsystem enthaltenden verbundkoerpers

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
US408304A US3334398A (en) 1964-11-02 1964-11-02 Fabrication of hollow articles

Publications (1)

Publication Number Publication Date
US3334398A true US3334398A (en) 1967-08-08

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US408304A Expired - Lifetime US3334398A (en) 1964-11-02 1964-11-02 Fabrication of hollow articles

Country Status (5)

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US (1) US3334398A (pt)
BR (1) BR6574430D0 (pt)
DE (2) DE1479560C3 (pt)
GB (1) GB1119191A (pt)
NO (1) NO122476B (pt)

Cited By (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4080702A (en) * 1977-03-16 1978-03-28 Olin Corporation Method for obtaining hollow articles
US4093024A (en) * 1976-06-15 1978-06-06 Olin Corporation Heat exchanger exhibiting improved fluid distribution
EP0286400A1 (en) * 1987-04-08 1988-10-12 Du Pont Canada Inc. Process for the manufacture of heat exchangers from polymers
US5408965A (en) * 1993-10-04 1995-04-25 Ford Motor Company Internal combustion engine oil pan with oil cooler
EP0703427A1 (en) * 1994-09-21 1996-03-27 Showa Aluminum Corporation Process for producing roll-bonded pannels
US20050133575A1 (en) * 2003-12-17 2005-06-23 Xiaohong Gayden Bipolar plate fabrication by roll bonding
US20050133568A1 (en) * 2003-12-17 2005-06-23 Sigler David R. Bipolar plate fabrication

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2561368B1 (fr) * 1983-12-01 1986-08-14 Cegedur Procede de fabrication de panneaux monoface a circuit integre pour echangeurs de chaleur

Citations (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2896312A (en) * 1955-02-25 1959-07-28 Gen Motors Corp Refrigerating apparatus
US2920377A (en) * 1956-10-12 1960-01-12 Gen Electric Evaporator structure and method of manufacture
US2948053A (en) * 1956-03-23 1960-08-09 Philco Corp Method of manufacturing refrigerating apparatus
US2991047A (en) * 1957-07-26 1961-07-04 Borg Warner Heat exchanger
US3038246A (en) * 1956-01-18 1962-06-12 Olin Mathieson Fabrication of hollow articles
US3140755A (en) * 1960-04-15 1964-07-14 Olin Mathieson Muffler or other hollow article and fabrication of same
US3170229A (en) * 1959-06-23 1965-02-23 Olin Mathieson Fabrication of hollow articles

Patent Citations (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2896312A (en) * 1955-02-25 1959-07-28 Gen Motors Corp Refrigerating apparatus
US3038246A (en) * 1956-01-18 1962-06-12 Olin Mathieson Fabrication of hollow articles
US2948053A (en) * 1956-03-23 1960-08-09 Philco Corp Method of manufacturing refrigerating apparatus
US2920377A (en) * 1956-10-12 1960-01-12 Gen Electric Evaporator structure and method of manufacture
US2991047A (en) * 1957-07-26 1961-07-04 Borg Warner Heat exchanger
US3170229A (en) * 1959-06-23 1965-02-23 Olin Mathieson Fabrication of hollow articles
US3140755A (en) * 1960-04-15 1964-07-14 Olin Mathieson Muffler or other hollow article and fabrication of same

Cited By (10)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4093024A (en) * 1976-06-15 1978-06-06 Olin Corporation Heat exchanger exhibiting improved fluid distribution
US4080702A (en) * 1977-03-16 1978-03-28 Olin Corporation Method for obtaining hollow articles
EP0286400A1 (en) * 1987-04-08 1988-10-12 Du Pont Canada Inc. Process for the manufacture of heat exchangers from polymers
US4859265A (en) * 1987-04-08 1989-08-22 Du Pont Canada Inc. Process for manufacturing of heat exchangers from polymers
US5408965A (en) * 1993-10-04 1995-04-25 Ford Motor Company Internal combustion engine oil pan with oil cooler
EP0703427A1 (en) * 1994-09-21 1996-03-27 Showa Aluminum Corporation Process for producing roll-bonded pannels
US20050133575A1 (en) * 2003-12-17 2005-06-23 Xiaohong Gayden Bipolar plate fabrication by roll bonding
US20050133568A1 (en) * 2003-12-17 2005-06-23 Sigler David R. Bipolar plate fabrication
US7252218B2 (en) * 2003-12-17 2007-08-07 General Motors Corporation Bipolar plate fabrication by roll bonding
US7258263B2 (en) * 2003-12-17 2007-08-21 General Motors Corporation Bipolar plate fabrication

Also Published As

Publication number Publication date
DE1753860A1 (de) 1976-02-05
DE1479560A1 (de) 1969-05-22
DE1479560C3 (de) 1975-10-30
BR6574430D0 (pt) 1973-07-03
NO122476B (pt) 1971-07-05
DE1479560B2 (de) 1975-03-20
GB1119191A (en) 1968-07-10

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