US3774561A - Article of manufacture and manufacturing of such article - Google Patents

Article of manufacture and manufacturing of such article Download PDF

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Publication number
US3774561A
US3774561A US00200128A US3774561DA US3774561A US 3774561 A US3774561 A US 3774561A US 00200128 A US00200128 A US 00200128A US 3774561D A US3774561D A US 3774561DA US 3774561 A US3774561 A US 3774561A
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United States
Prior art keywords
deep
basins
sheet
drawn
depth
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Expired - Lifetime
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US00200128A
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English (en)
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W Herbold
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Individual
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Individual
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    • 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
    • B21D22/00—Shaping without cutting, by stamping, spinning, or deep-drawing
    • B21D22/20—Deep-drawing
    • B21D22/26—Deep-drawing for making peculiarly, e.g. irregularly, shaped articles
    • 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
    • B21D51/00—Making hollow objects
    • B21D51/16—Making hollow objects characterised by the use of the objects
    • B21D51/18—Making hollow objects characterised by the use of the objects vessels, e.g. tubs, vats, tanks, sinks, or the like
    • E—FIXED CONSTRUCTIONS
    • E03—WATER SUPPLY; SEWERAGE
    • E03C—DOMESTIC PLUMBING INSTALLATIONS FOR FRESH WATER OR WASTE WATER; SINKS
    • E03C1/00—Domestic plumbing installations for fresh water or waste water; Sinks
    • E03C1/12—Plumbing installations for waste water; Basins or fountains connected thereto; Sinks
    • E03C1/18—Sinks, whether or not connected to the waste-pipe

Definitions

  • a sink unit is deep-drawn from a one-piece seamless Nov. 21, 1970 Germany P 20 57 339.! stainless steel sheet, being provided with two basins which are laterally adjacent one another and with a [52] U.S. C1. 113/120 B, 72/349 work urface which is laterally adjacent one of th b [51] Int. Cl. B2ld 51/18 sins.
  • a method of deep-drawing such a sink unit, and [58] Field of Search 113/ 120 B, 120 R; an arrangement for engaging it during deep-drawing 72/348, 349, 350, 351 are also disclosed.
  • the present invention relates generally to a sink unit and more particularly to a multiple-basin sink unit and a method of making the same.
  • Sink units are already known. They are so constructed that they can usually be inserted into a cut-out of a counter top or the like, and are quite frequently made of rust-free stainless steel sheet. Many such sink units have two basins which are located laterally adjacent one another, being separated by a narrow strip of sheet material. Such sink units are produced in that each separate basin is separately produced by deepdrawing from a sheet of stainless steel, and then the two separate basins are welded together so that a welded seam extends intermediate them in the narrow sheet material strip which is located between them and which separates them.
  • Another known sink unit utilizes a single basin, laterally of which there is located a work and- /or drain surface. This construction does not require a welded seam because only a single basin is produced by deep-drawing from a single sheet of stainless steel.
  • this singlebasin type of sink unit is the only type that can be produced by deep-drawing without requiring the subsequent provision of a welded seam to connect two components of the unit together.
  • a concomitant object of the invention is to provide such a sink unit which can be produced by deepdrawing from a single piece of stainless steel sheet material without requiring any welding operations or the like.
  • one feature of the invention resides accordingly in a sink unit as a novel article of manufacture, such sink unit being of a seamless one-piece sheet of stainless steel which defines a pair of closely laterally adjacent basins and a work surface laterally adjacent one of these basins.
  • the invention thus has the advantage that the heretofore necessary welding operation and the subsequent grinding and polishing of the welded seam can be omitted, thereby saving time and labor and having less scrap produced because only a single sheet material element need be trimmed at its edges after the deep-drawing process is completed.
  • the edge of the sink unit is flattened, then the heretofore necessary welded seams at the junctures of the downwardly bent edge flanges can also be omitted, so that the sink unit according to the present invention can be constructed in its entirety without ever having to resort to any welding operations whatsoever.
  • the invention is all the more interesting because expert opinion has always held that a sink unit according to the present invention could not be produced by a deep-drawing for various reasons, including the assumption that at the narrow strip of sheet material between the laterally adjacent basis the sheet material was thought not to be capable of withstanding the stresses resulting during deep-drawing deformation.
  • the invention is all the more surprising because it is feasible despite these expert reservations, and even more so because the deep-drawing process is of course made more difficult by the fact that laterally adjacent one of the basins there is the relatively large work and- /or drain surface whose provision was thought in expert opinion to add further obstacles to the production of a one-piece sink unit of the type herein disclosed.
  • Known sink units which are seamless and of one piece but have only a single basin are deep-drawn in two or three deep-drawing steps.
  • the essential sheet material deformation is effected during the first deepdrawing step, and if for instance the basin is to have a finished depth of 160 mm, then in a two-step deepdrawing operation the basin is deep-drawn to approximately 150 mm in the first step, and if the deepdrawing operation is of the three-step type, the basin is deep-drawn to approximately 145 mm in the first step. In the second step it is then drawn to approximately 150 mm, and in the third and final step tothe finished depth of 160 mm. This means that in either the twostep or three-step operation, the finished depth of the basin is almost reached during the first deep-drawing step.
  • the present invention proposes, contrary to the teaching of the prior art, to utilize deep-drawing operations of the three-step type or of a typehaving more than three steps. It has been found particularly advantageous to anneal the sheet of stainless steel between the second and third deep-drawing step, an important feature in the method according to the present inven-1 tion for making the novel article. I have also found it advantageous to deep-draw the sheet in one direction and to one side during the first deep-drawing step, and to reverse the thus-obtained deformation in the second step and to deep-draw it to the opposite side to a depth greater than that achieved in the first step. In this manner tearing of the sheet material can be avoided with great reliability.
  • the invention also proposes, contrary to the teaching of the prior art, to produce only a relatively small por tion of the final desired depth of the basin during the first deep-drawing step. It is'particularly advantageous to deep-draw the basins in the first deep-drawing step to only approximately 20-25 percent of the final desired depth. In the second deep-drawing step the basins are then drawn to approximately -75 percent of their final desired depth. If, following the earlier-mentioned example, it is assumed that the final desired depth of the basins is to be approximately mm, then the basins are deep-drawn in the first deep-drawing step to approximately 35 mm depth, with a tolerance of :2-3 mm, and in the second step to approximately 1 15 mm with a tolerance of +5 mm.
  • the tools for the deep-drawing operation may be variously configurated in accordance with principles well known to those skilled in the art.
  • a possible and inexpensive solution has been found in utilizing the same tool or die for the first and second deep-drawing step, whereas a different die, giving the final desired form for the basins, is utilized for the third deep-drawing step.
  • the present invention proposes a device which is to assure the miminum formation of folds during the deepdrawing and tp provide maximum assurance against tearing of the sheet.
  • This device is to engage the sheet during the deep-drawing operation with different strength at different locations, and in particular the arrangement according to the present invention engages the sheet most firmly along lines extending in parallelism and with spacing along the front and rear edges of the two laterally adjacent basins, but not to the respective outermost edges thereof, and an additional region of firmest engagement is along one lateral side of that basin which is remote from the work surface.
  • the sheet is engaged with lesser firmness in the region of those edges of the basin adjacent the work surface which face towards the latter.
  • FIG. 1 is a somewhat diagrammatic top-plan view of a sink unit according to the present invention
  • FIG. 2 is a section taken on line II-II of FIG. 1;
  • FIG. 3 is a fragmentary detail view, on an enlarged scale, of the corner of the edge portion which is encircled in FIG. 2;
  • FIGS. ,4a-4c are schematic views corresponding to the section of FIG. 2 but illustrating the sheet of stainless steel during the first, second, and third deepdrawing steps, respectively;
  • FIG. 5 is a diagrammatic top-plan view illustrating a sheet of steel and an arrangement for engaging it in ac cordance with the invention during deep-drawing; and FIG. 6 is a schematic section of a drawing tool providing the arrangement according to FIG. 5, the section being taken according to line 6-6 of FIG. 5.
  • reference numerals l0 and 12 define two basins provided in a sink unit according to the present invention, with a work and/or drain surface 14 being provided laterally adja cent the basin 10.
  • the two basins l0 and 12 are separated by the illustrated narrow sheet material strip.
  • the sink unit illustrated in FIGS. 1-3 is deep-drawn of a single seamless sheet of stainless steel and is provided along its rear edge with an upwardly extending portion 16, and at its side edges and front edge with downwardly angled L-shaped flanges 18 and 20.
  • the juncture of the comers of the flanges l8 and 20 may be welded at 22, as shown in FIG. 1 and in accordance with the practice of the prior art, it is currently preferred to utilize the construction shown in FIG. 3 in which these flanges or edges are flattened in the region of these junctures, as indicated at 24 in FIG. 3, so that any need for producing welded seams is avoided, and the entire sink unit is produced without any welding at all.
  • FIGS. 4a, 4b and 4c now show a possible and currently preferred deep-drawing method for making the sink unit according .to the present invention.
  • the same deep-drawing tool or die used for producing the bulges 10a and 12a can be utilized for the second deepdrawing step illustrated in FIG.
  • the sheet is annealed in accordance with well-known annealing-technique, and there follows the final deepdrawing step shown in FIG. 4c in whcih the bulges 10b and 12b are subjected to further deep-drawing until the final shape and depth of the basins 10 and 12 is reached.
  • the surface 14 can also be provided with ribs or the like for drain purposes.
  • FIG. 5 finally, shows a top-plan view of a sheet of stainless steel, on which the regions l0, l2 and 14 have been illustrated for purposes of orientation, showing how an arrangement according to the present invention is to engage the sheet during deep-drawing.
  • regions 30 and 32 extending along the front and rear edges of the basins 10 and 12 firmest engagement is to be effected, suitable clamping devices or the like being provided for this purpose.
  • a similar region 34 of firmest engagement extends along the side of the basin 12 which faces away from the area 14.
  • Curved regions 36 extending around the corners of the basin 10 which are closest to the region 14, designate areas of less firrn engagement, and with an arrangement of this type-for whose engaging purposes suitable clamps known al-.
  • the sheet is held in such a manner during deep-drawing operation that the formation of folds in the material and the possibility of tearing thereof is minimized.
  • FIG. 6 shows a sectionof a drawing tool suitable for manufacturing a sink unit by means of a conventional drawing press.
  • a lower work table of this press is designated by 40, and an upper fixture, which can be moved down, is designated by 42.
  • the latter has an opening 44 for a die 46, which can be moved down independent of fixture 42.
  • a matrix 48 and a press pad 50 are mounted by conventional means not shown on the work table 10 and the fixture 42, respectively, engaging absolutely plane surfaces 40a and 42a of the work table and of the fixture.
  • FIG. 6 shows a sheet 60 of stainless steel after the deep drawing process. In order to provide regions 30 and 32 of firmest engagement of the sheet 60 on both sides of basin 10 it is sufficient to place above the desired regions strips 62 of paper or cardboard between press pad 50 and fixture 42. Under pressure of the drawing press these strips result in an elastic distortion of the press pad 50 in such a manner that the sheet 60 is gripped stronger in the regions 30 and 32 compared with adjacent regions.
  • a method of making a sink unit having a pair of laterally adjacent basins and a work surface laterally adjacent one of said basins comprising the steps of tightly engaging a sheet of stainless steel along transversely spaced parallel lines between which an area of the sheet is to be deep-drawn to form said pair of basins, but which lines have a length less that the distance between the loci where the outermost comers of the basins are to be located; tightly engaging said sheet along an additional line extending transversely to said parallel lines, at a side of said area which is remote from said work surface but which terminates short of said parallel lines less tightly engaging said sheet outside the region defined by said parallel and transverse lines for shaping said work surface; and deep-drawing said sheet intermediate said lines at least three times for each sink unit to be formed, whereby to produce said basins in, and shape said work surface on said sheet.
  • steps of deep-drawing comprise a first step in which said sheet is deep-drawn to one side and to a first depth, and a second step in which said sheet is deep-drawn to the opposite side and to a greater second depth.
  • steps of deep-drawing comprise a first step in which said basins are deep-drawn to between substantially 20-25 percent of their final desired depth, and a second step in which said basins are deep-drawn to between substantially 75 percent of their final desired depth.
  • steps comprise a first and a second deep-drawing step which are carried out with one die, and a third deep-drawing step which is carried 'out with an other die.

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  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Environmental & Geological Engineering (AREA)
  • Health & Medical Sciences (AREA)
  • Life Sciences & Earth Sciences (AREA)
  • Hydrology & Water Resources (AREA)
  • Public Health (AREA)
  • Water Supply & Treatment (AREA)
  • Sink And Installation For Waste Water (AREA)
  • Heat Treatment Of Articles (AREA)
  • Shaping Metal By Deep-Drawing, Or The Like (AREA)
US00200128A 1970-11-21 1971-11-19 Article of manufacture and manufacturing of such article Expired - Lifetime US3774561A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
DE2057339A DE2057339B2 (de) 1970-11-21 1970-11-21 Verfahren zur Herstellung einer Spültischabdeckung

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US (1) US3774561A (de)
AT (1) AT319016B (de)
BE (1) BE775568A (de)
CH (1) CH534494A (de)
DE (1) DE2057339B2 (de)
FR (1) FR2115884A5 (de)
GB (1) GB1354389A (de)
IT (1) IT940738B (de)
LU (1) LU64300A1 (de)
NL (1) NL7114853A (de)

Cited By (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3918377A (en) * 1970-11-21 1975-11-11 Blanc & Co Article of manufacture and manufacturing of such article
US4309888A (en) * 1976-07-22 1982-01-12 Kraftco Corporation Apparatus for forming a container pan
US4603571A (en) * 1984-08-07 1986-08-05 Wessels Ewald J H Apparatus for drawing circular cups from non-circular blanks
US5644943A (en) * 1996-04-22 1997-07-08 Franke Inc. Method for forming a seamless stainless steel sink bowl with a grid ledge and product
CN100415404C (zh) * 2006-08-17 2008-09-03 徐剑光 不锈钢水槽的成型加工工艺
US20140075691A1 (en) * 2010-01-22 2014-03-20 Victor Ha Albright Implement washing apparatus and method
US12064820B2 (en) * 2019-02-15 2024-08-20 Mila International Inc. Process for milling a kitchen sink

Families Citing this family (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CH583071A5 (de) * 1974-03-07 1976-12-31 Luwa Ag
DE3136632A1 (de) * 1981-09-15 1983-05-05 Uniplanung Metall- und Kunststoffengineering GmbH & Co KG, 7552 Durmersheim Verfahren zum herstellen von tiefgezogenen hohlteilen
CN105904129B (zh) * 2016-06-27 2017-07-07 宁波塞尔翔鹰金属制品有限公司 一种水槽翅焊接结构及焊接方法

Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US1635311A (en) * 1927-07-12 corrigan
US2063243A (en) * 1934-12-29 1936-12-08 Pierce John B Foundation Sink and laundry tub
US2305866A (en) * 1939-09-05 1942-12-22 Briggs Mfg Co Method for making laundry tubs or the like
US2761406A (en) * 1954-05-25 1956-09-04 Michael S Schnell Die for drawing sheet material
US3421466A (en) * 1965-04-20 1969-01-14 Polar Ware Co Sink-forming method

Patent Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US1635311A (en) * 1927-07-12 corrigan
US2063243A (en) * 1934-12-29 1936-12-08 Pierce John B Foundation Sink and laundry tub
US2305866A (en) * 1939-09-05 1942-12-22 Briggs Mfg Co Method for making laundry tubs or the like
US2761406A (en) * 1954-05-25 1956-09-04 Michael S Schnell Die for drawing sheet material
US3421466A (en) * 1965-04-20 1969-01-14 Polar Ware Co Sink-forming method

Cited By (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3918377A (en) * 1970-11-21 1975-11-11 Blanc & Co Article of manufacture and manufacturing of such article
US4309888A (en) * 1976-07-22 1982-01-12 Kraftco Corporation Apparatus for forming a container pan
US4603571A (en) * 1984-08-07 1986-08-05 Wessels Ewald J H Apparatus for drawing circular cups from non-circular blanks
US5644943A (en) * 1996-04-22 1997-07-08 Franke Inc. Method for forming a seamless stainless steel sink bowl with a grid ledge and product
US5797150A (en) * 1996-04-22 1998-08-25 Franke Inc. Seamless stainless steel sink bowl with a grid ledge
CN100415404C (zh) * 2006-08-17 2008-09-03 徐剑光 不锈钢水槽的成型加工工艺
US20140075691A1 (en) * 2010-01-22 2014-03-20 Victor Ha Albright Implement washing apparatus and method
US9247860B2 (en) * 2010-01-22 2016-02-02 Victor Ha Albright Implement washing apparatus and method
US12064820B2 (en) * 2019-02-15 2024-08-20 Mila International Inc. Process for milling a kitchen sink

Also Published As

Publication number Publication date
BE775568A (fr) 1972-03-16
AT319016B (de) 1974-11-25
DE2057339B2 (de) 1975-09-04
IT940738B (it) 1973-02-20
GB1354389A (en) 1974-06-05
NL7114853A (de) 1972-05-24
FR2115884A5 (de) 1972-07-07
DE2057339A1 (de) 1972-05-25
CH534494A (de) 1973-03-15
LU64300A1 (de) 1972-06-13

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