WO1981003630A1 - Flan de fabrication d'une conduite d'air de section rectangulaire - Google Patents

Flan de fabrication d'une conduite d'air de section rectangulaire Download PDF

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Publication number
WO1981003630A1
WO1981003630A1 PCT/SE1981/000165 SE8100165W WO8103630A1 WO 1981003630 A1 WO1981003630 A1 WO 1981003630A1 SE 8100165 W SE8100165 W SE 8100165W WO 8103630 A1 WO8103630 A1 WO 8103630A1
Authority
WO
WIPO (PCT)
Prior art keywords
plate
holes
blank
duct
section
Prior art date
Application number
PCT/SE1981/000165
Other languages
English (en)
Inventor
S Norlund
Original Assignee
S Norlund
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 S Norlund filed Critical S Norlund
Publication of WO1981003630A1 publication Critical patent/WO1981003630A1/fr

Links

Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
    • B21C—MANUFACTURE OF METAL SHEETS, WIRE, RODS, TUBES OR PROFILES, OTHERWISE THAN BY ROLLING; AUXILIARY OPERATIONS USED IN CONNECTION WITH METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL
    • B21C37/00—Manufacture of metal sheets, bars, wire, tubes or like semi-manufactured products, not otherwise provided for; Manufacture of tubes of special shape
    • B21C37/06—Manufacture of metal sheets, bars, wire, tubes or like semi-manufactured products, not otherwise provided for; Manufacture of tubes of special shape of tubes or metal hoses; Combined procedures for making tubes, e.g. for making multi-wall tubes
    • B21C37/15—Making tubes of special shape; Making tube fittings
    • B21C37/155—Making tubes with non circular section

Definitions

  • the present invention relates to a blank for manufactur ⁇ ing an air duct of rectangular cross section, and particu ⁇ larly to a blank by means of which an air duct can be con ⁇ structed in a simple manner on the working site, without the use of special tools herefore.
  • a main object of the present invention is to provide a blank for the manufacture of sheet-metal ducts , which can be readily pre-fabricated; which permits storage and trans ⁇ port space to be utilized to the maximum; and which can be readily assembled on the working site without employing spe ⁇ cialized personnel and/or using special tools.
  • a blank according to the invention com ⁇ prises a substantially rectangular plate having a width which substantially coincides with the circumference of the duct desired and a length which corresponds to the length of said duct.
  • the blank is characterized in that said plate is provided with three spaced apart and paral ⁇ lel rows of holes which form weakened sections extending in the longitudinal direction of the plate and serving as bending or folding lines; and in that the longitudinally extending * edge parts of the plate are provided with lock ⁇ ing means which co-act when folding or bending the plate into a duct.
  • the blank is provided with a plurality of substantially parallel, transverse, groove-like emboss ⁇ ments which serve to facilitate bending of the blank and permit the defining surfaces thereof to be planar.
  • a hole should be punched at the intersection poin between each groove-like embossment and each row of holes, to facilitate bending of the blank.
  • the duct should be insulated, to which end one surface of the plate is covered with in ⁇ sulating plates which are chamfered down to the rows of weakened sections and which, when the blank is folded to form a duct, automatically form a complete, internal in ⁇ sulation.
  • Figures 1 and 2 illustrate a blank according to the in vention in plan view and side view respectively.
  • Figure 3 illustrates a duct manufactured from a blank according to Figures 1 and 2.
  • Figures 4 and 5 are side views of parts of two blanks according to the invention shown in a larger scale than
  • O ⁇ .1PI Figure 6 is a side view of a joint between two ducts according to the invention.
  • Figure 7 is a part sectional view of a joint according to Figure 6.
  • the blank shown in Figures 1 and 2 have the form of a substantially rectangular sheet-metal plate 1 with a width which coincides substantially with the circumference of the desired duct section and a length corresponding to the length of said section. Punched in the plate 1 are three * rows of holes 2 which are parallel with each other and with the longitudinally extending edges of the plate, and which weaken the plate to form ' effective bending lines. The dis ⁇ tance between the rows of holes and. between the outermost rows and the longitudinally extending edges of the plate determine the size of the sides .of the duct section formed from the blank.
  • the thickness of the plate is normally less than 1 mm and in one preferred embodiment is 0,3 mm.
  • the diameter of the holes are suitably in the order of 5-10 times the thickness of the plate; in one .embodiment the diameter is about 8 times said plate thickness, whereat the spacing between respective holes is suitable of the order of 10-20 times the plate thickness and in the preferred embodiment about 15 ' times said plate thickness.
  • the plate is also provided with a plurality of trans- verse, substantially parallel grooved beads or embossments 3 , which facilitate the manufacture of a duct section hav ⁇ ing planar defining surfaces while, at the same time, rigi- difying the duct section as a whole. It is important that these embossments are broken in line with the rows of holes by means of a hole 4 having a diameter or an axial length which is at least as wide as the width of the embossment 3. As will best be seen from Figure 2, the plate 1 is pro ⁇ vided along one longitudinally extending side with a part 5 which is bent or folded through an angle of about 90°.
  • the blan is provided along the opposite longitudinally extending edge with outwardly projecting tongues 6 which, subsequen to folding the blank to form a duct section of rectangula cross section, can be inserted in slots 7 which correspon to the tongues 6 and which are arranged in the transition region to the folded part 5.
  • the blank is illustrated from that side which will later form the outside of the duct section, while the other side of the blank' is provided with insula ing plates as shown in Figure 2.
  • insula ing plates are, by way of example, glued to the blank during its man facture. This enables the insulating plates to be accurat ely attached to the blank, therewith guaranteing an almos perfect positioning of the insulation in the finished duc section. Such precise insulation is extremely difficult t achieve- when applying present day techniques , in which th duct is manufactured on the building site.
  • the insulation comprises longitudinally ex- tending insulating sheets 8 which are chamfered at an ang of 45 towards each row of holes, which will form the cor ners of the finished duct section.
  • the insulating layers may, for example, comprise conventional mineral wool or synthetic insulating material.
  • the duct section is given extremely well defined corners , 'which among other things causes the insulating layers 8 to lie in close abut ⁇ ment with each other at said corners. If so desired an ad- hesive can be applied to the chamfered surfaces of the in ⁇ sulating layers 8, thereby to obtain a practically comple ⁇ tely sealed duct section.
  • the resultant duct section is extremely rigid, mostly as the result of the groove-shaped embossments 3. These embossments also cause the side s r- faces of the duct section to be, in the main, planar.
  • a blank such as that illustrated in Figures 1 and 2 can be manufactured very simply, and since the finished blanks can be stacked flat one upon the other said blanks can be stored .and transported economically.
  • the blanks can be bent, folded and locked to form duct sections of rectangular cross section on the building site in a ready and easy * manner without requiring particular expertese or the use of special tools.
  • Two duct sections constructed in accordance with the invention can suitably be joined together by means of a device illustrated in Figures 6 and 7. This device com ⁇ prises a rectangular U-shaped frame structure 11 in the * form of a sleeve arranged to embrace two mutually opposin end portions of the duct sections to be joined together.
  • the frame structure is provided with hook means 12 arrang ed to co-act with holes arranged in the corners of the sa drum sections and provided with screw-threaded sections f receiving respective nuts 13, by which the sections can b drawn together.
  • the frame structures may also be provided with or connected to mounting means, such as the angle- iron 14 illustrated in Figure 6.
  • a rubber seal 15 or like element is suitably mounted on the inner surface of the frame section, to seal the joint between the respective duct sections, as illustrated in Figure 7.
  • the invention has been described in the aforegoing wi reference to a preferred embodiment.
  • the blank may be modified in several respects within the scope of t claims, said blank, for example, being either insulated o not insulated.
  • the means for locking the duct sections of rectangular cross-section together may vary.
  • the jointing means may also be given another form.
  • the si of the holes and the form which said holes take may also vary in dependence upon the thickness of the material use and its nature. For example, instead of circular holes th holes may be of a narrow and elongate configuration.

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Shaping Metal By Deep-Drawing, Or The Like (AREA)
  • Duct Arrangements (AREA)

Abstract

Flan de fabrication d'une conduite d'air de section rectangulaire, consistant en une plaque sensiblement rectangulaire (1) ayant une largeur qui coincide sensiblement avec la circonference de la conduite desiree et une longueur correspondant a la longueur de cette conduite. La plaque (1) est pourvue de trois rangees paralleles de trous (2) qui s'etendent espaces uniformement dans le sens longitudinal de la plaque et forment des sections affaiblies constituant des lignes de flexion ou pliage. Les bordures longitudinales de la plaque (1) sont pourvues de moyens de verrouillage (6, 7) qui agissent ensemble lors du pliage de la plaque pour former une conduite.
PCT/SE1981/000165 1980-06-11 1981-06-04 Flan de fabrication d'une conduite d'air de section rectangulaire WO1981003630A1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
SE8004363 1980-06-11
SE8004363A SE431170B (sv) 1980-06-11 1980-06-11 Emne till isolerad lufttrumma med rektangulert tversnitt

Publications (1)

Publication Number Publication Date
WO1981003630A1 true WO1981003630A1 (fr) 1981-12-24

Family

ID=20341199

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/SE1981/000165 WO1981003630A1 (fr) 1980-06-11 1981-06-04 Flan de fabrication d'une conduite d'air de section rectangulaire

Country Status (2)

Country Link
SE (1) SE431170B (fr)
WO (1) WO1981003630A1 (fr)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB2271944A (en) * 1992-10-31 1994-05-04 David Richard Hurst Production of ductwork systems
EP0945192A1 (fr) * 1998-03-26 1999-09-29 Alfred Chocroun Procédé de raidissement d'une plaque de tÔle mince et tableau avec cadre de renfort obtenu par un tel procédé

Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3092529A (en) * 1955-07-01 1963-06-04 Owens Corning Fiberglass Corp Duct or conduit blank
GB1144593A (en) * 1965-06-09 1969-03-05 Svenska Flaektfabriken Ab A method for the manufacture of rectangular ducts
GB1231996A (fr) * 1968-12-18 1971-05-12
FR2404164A1 (fr) * 1977-09-22 1979-04-20 Guillaumond Gabriel Bande metallique perforee pour la realisation de profils varies d'assemblage

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3092529A (en) * 1955-07-01 1963-06-04 Owens Corning Fiberglass Corp Duct or conduit blank
GB1144593A (en) * 1965-06-09 1969-03-05 Svenska Flaektfabriken Ab A method for the manufacture of rectangular ducts
GB1231996A (fr) * 1968-12-18 1971-05-12
FR2404164A1 (fr) * 1977-09-22 1979-04-20 Guillaumond Gabriel Bande metallique perforee pour la realisation de profils varies d'assemblage

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB2271944A (en) * 1992-10-31 1994-05-04 David Richard Hurst Production of ductwork systems
GB2271944B (en) * 1992-10-31 1995-12-06 David Richard Hurst Production of ductwork systems
EP0945192A1 (fr) * 1998-03-26 1999-09-29 Alfred Chocroun Procédé de raidissement d'une plaque de tÔle mince et tableau avec cadre de renfort obtenu par un tel procédé
FR2776547A1 (fr) * 1998-03-26 1999-10-01 Alfred Chocroun Profile raidisseur de plaques de tole mince

Also Published As

Publication number Publication date
SE431170B (sv) 1984-01-23
SE8004363L (sv) 1981-12-12

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