WO2000009317A1 - Structure a double paroi pour mandrin nervure - Google Patents

Structure a double paroi pour mandrin nervure Download PDF

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Publication number
WO2000009317A1
WO2000009317A1 PCT/US1999/017172 US9917172W WO0009317A1 WO 2000009317 A1 WO2000009317 A1 WO 2000009317A1 US 9917172 W US9917172 W US 9917172W WO 0009317 A1 WO0009317 A1 WO 0009317A1
Authority
WO
WIPO (PCT)
Prior art keywords
ribs
composite tube
tube
disposed
walls
Prior art date
Application number
PCT/US1999/017172
Other languages
English (en)
Other versions
WO2000009317A9 (fr
Inventor
F. John Herrington
Original Assignee
Proteus Inc.
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 Proteus Inc. filed Critical Proteus Inc.
Priority to AU53256/99A priority Critical patent/AU5325699A/en
Publication of WO2000009317A1 publication Critical patent/WO2000009317A1/fr
Priority to US09/626,886 priority patent/US6405974B1/en
Publication of WO2000009317A9 publication Critical patent/WO2000009317A9/fr
Priority to US10/139,208 priority patent/US6955780B2/en
Priority to US10/366,652 priority patent/USRE39521E1/en
Priority to US11/154,018 priority patent/US7140859B2/en

Links

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
    • B29C53/00—Shaping by bending, folding, twisting, straightening or flattening; Apparatus therefor
    • B29C53/14—Twisting
    • 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
    • B29C48/00—Extrusion moulding, i.e. expressing the moulding material through a die or nozzle which imparts the desired form; Apparatus therefor
    • B29C48/001—Combinations of extrusion moulding with other shaping operations
    • B29C48/0021—Combinations of extrusion moulding with other shaping operations combined with joining, lining or laminating
    • 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
    • B29C48/00—Extrusion moulding, i.e. expressing the moulding material through a die or nozzle which imparts the desired form; Apparatus therefor
    • B29C48/03—Extrusion moulding, i.e. expressing the moulding material through a die or nozzle which imparts the desired form; Apparatus therefor characterised by the shape of the extruded material at extrusion
    • B29C48/09—Articles with cross-sections having partially or fully enclosed cavities, e.g. pipes or channels
    • B29C48/11—Articles with cross-sections having partially or fully enclosed cavities, e.g. pipes or channels comprising two or more partially or fully enclosed cavities, e.g. honeycomb-shaped
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
    • F16L—PIPES; JOINTS OR FITTINGS FOR PIPES; SUPPORTS FOR PIPES, CABLES OR PROTECTIVE TUBING; MEANS FOR THERMAL INSULATION IN GENERAL
    • F16L9/00—Rigid pipes
    • F16L9/18—Double-walled pipes; Multi-channel pipes or pipe assemblies
    • F16L9/19—Multi-channel pipes or pipe assemblies
    • 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
    • B29C48/00—Extrusion moulding, i.e. expressing the moulding material through a die or nozzle which imparts the desired form; Apparatus therefor
    • B29C48/03—Extrusion moulding, i.e. expressing the moulding material through a die or nozzle which imparts the desired form; Apparatus therefor characterised by the shape of the extruded material at extrusion
    • B29C48/09—Articles with cross-sections having partially or fully enclosed cavities, e.g. pipes or channels
    • 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
    • B29C48/00—Extrusion moulding, i.e. expressing the moulding material through a die or nozzle which imparts the desired form; Apparatus therefor
    • B29C48/03—Extrusion moulding, i.e. expressing the moulding material through a die or nozzle which imparts the desired form; Apparatus therefor characterised by the shape of the extruded material at extrusion
    • B29C48/12—Articles with an irregular circumference when viewed in cross-section, e.g. window profiles
    • 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
    • B29C48/00—Extrusion moulding, i.e. expressing the moulding material through a die or nozzle which imparts the desired form; Apparatus therefor
    • B29C48/03—Extrusion moulding, i.e. expressing the moulding material through a die or nozzle which imparts the desired form; Apparatus therefor characterised by the shape of the extruded material at extrusion
    • B29C48/13—Articles with a cross-section varying in the longitudinal direction, e.g. corrugated pipes
    • 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
    • B29L2023/00—Tubular articles
    • B29L2023/22—Tubes or pipes, i.e. rigid
    • 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
    • B29L2024/00—Articles with hollow walls
    • B29L2024/006—Articles with hollow walls multi-channelled
    • 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
    • B29L2031/60—Multitubular or multicompartmented articles, e.g. honeycomb

Definitions

  • This invention relates to generally tubular articles such as cores for rolled goods like carpets and plastic film. It more particularly refers to such cores that are light in weight and have unusually high crush resistance. It further relates to decorative toy articles made from such tubular articles.
  • Cores for all kinds of rolled goods such as plastic film, carpeting, paper products, and the like, are well known. In many instances, these cores are simply hollow cylindrical rolls of cardboard or other materials. In other cases, these cores may be- solid plastic, wood or metal rods.
  • a decorative end plug for rolled paper such as newsprint.
  • the end plug is made up of a centrally located opening for receiving an axially disposed shaft, a generally flat, solid, disc like portion 16 disposed radially about the shaft receiving axial opening 18, and a peripheral rim portion 20 disposed radially around the disc portion 16.
  • a core 12 of the paper roll 10 is intended to fit about the rim portion 20.
  • the described end plug is intended to fit within the core of the roll of paper and the shaft (unnumbered) that will support the assembly is intended to pass through the axial opening 18 in the end plug.
  • the peripheral rim portion 20 of this disclosed end plug appears to be composed of a "U” shaped member that is made up of two concentric elements 26 and 30 that form the arms of the "U".
  • a series of webs 34 and 36 appear to span the top of the "U”. These webs and the arms of the "U” are so arranged as to form generally triangular areas or cells 38.
  • This end plug is intended to help to support the ends of the paper roll on its cylindrical paper core.
  • the depicted end plug is generally flat in cross section and is not disclosed to pass axially all the way through the paper roll or its cylindrical paper core. In fact, this end plug is characterized by having a diameter that is substantially larger than its depth, that is, it is a disk-like shape rather than a tube-like shape.
  • the end plug is said to taper inwardly in thickness from its periphery toward the central opening in order to increase its resiliency during its insertion into the end of the paper roll.
  • the '221 patent says that the depicted flat, disc like end cap may be made of molded plastic, such as polyethylene. It is clear that the depicted end cap is not suited to have paper or other flat goods rolled up on it, but is only suited to be inserted into the end of an already made roll of paper or the like. Despite the support that the end plug of the '221 patent may give to the ends of the internal tubular paper central tube, the paper core 12 must be self supporting and able to withstand the weight of the paper rolled thereon over substantially the whole of its length.
  • the disclosed end plug is intended to help protect the already made roll from damage during loading and unloading and during transit, not during the making of the roll of paper.
  • end plug of the prior art from the core structure of the instant invention which is intended for use in creating the roll of flat goods, especially stretch or shrink wrap plastic film (hereafter generally referred to as shrink wrap plastic film).
  • shrink wrap plastic film stretch or shrink wrap plastic film
  • the crush stress that is applied to the core by shrink wrap plastic film is substantially greater that what is applied by newsprint, and this stress increases with the amount of shrink wrap film that is wound on the central core. It increases further with the shrinkability of the film being wound and with the speed of winding of the film. Therefore, modern wrapping techniques use solid cores to support most industrial sized rolling of flat goods, from carpet to plastic film.
  • ⁇ is a further object of this invention to provide such a tubular article that has sufficient radial crush strength to support the stress of substantial quantities of flat goods, particularly shrink wrap plastic film, thereon.
  • one aspect of this invention is an elongated hollow tubular article, sometimes referred to herein as a composite tube, comprising a smaller diameter inner, generally hollow, tubular element and a larger diameter outer, generally hollow tubular element with at least one web of material disposed between, and attached to, both the inner and outer elements.
  • the intermediate web(s) of material enable the inner and outer tubes to maintain their radial spacing from each other.
  • these ribs or webs are substantially equidistantly spaced apart angularly (sometimes hererafter referred to as radially spaced apart ribs) within the toroidal area between the inner and the outer tubes.
  • These plural webs or ribs are preferably disposed in locations such that at least some of them, and preferably all of them, contact, and support, the radial spacing of both the inner and outer tubes, respectively, at locations where other such ribs also contact the inner and outer walls respectively.
  • each rib contacts the inner and outer tube and at the same time contacts, or at least is close to the point where the next adjacent rib also contacts, either the inner or the outer tubular wall, respectively.
  • this configuration causes a rib to be in contact with its next adjacent rib at the same time as it is in contact with one of the inner or outer tubes whereby forming generally triangular strut-like members.
  • this configuration causes a rib to be closely adjacent to its next adjacent rib at the point where it contacts either the inner or outer tubular wall whereby forming generally trapezoidal strut-like members.
  • each rib contacts both ribs that are next adjacent on each side thereof at the same time as it contacts the inner and outer tubular walls, respectively, or is at least proximate to both of these next adjacent ribs at the point where it contacts both the inner and outer walls, respectively.
  • This structure includes a rib structure between the inner and outer tubes where each rib and its next adjacent rib, together with the wall of the tube that is enclosed by the two next adjacent ribs, defines a series of substantially triangular or trapezoidal cells formed by one tube and two ribs each. These cells are not exactly triangular in cross section because the tube wall of the cell is arcuate and therefore the cross section of the cells is only approximately triangular or trapezoidal, respectively.
  • the structure of the composite tube of this invention it is a preference in the structure of the composite tube of this invention to slightly space the ribs apart at the points where they intersect the arcuate wall of one of the tubes.
  • the preferred cellular structure having a cross section that approximates a partially spherical frapezoid, is formed.
  • the slightly trapezoidal shape of the spacing cells has been found to be desirable and an improvement over the triangular cell cross section because, when the composite tube of this invention having generally trapezoidal cellular ribs is made by extrusion of molten plastic or metal material, an excess of the rib material does not accumulate at the point where the ribs contact the inner or outer tubular walls, respectively.
  • each rib extend the whole length of the composite tubular article of this invention, and that it contact and be adhered to and support both of the inner and outer tubes, respectively, along its entire length.
  • the ribs(s) may be attached to the inner and/or outer tubes at intermittent areas so long as the total amount of attachment is sufficient to accomplish the purposes of this invention, that is to maintain substantially consistent spacing between the inner and outer tubes while at the same time providing sufficient radial support to avoid the composite tube being crushed by the flat form film or sheet material wound thereon.
  • the rib(s) should preferably extend continuously from one end of the composite tubular structure of this invention to the other, but this is not an absolute requirement.
  • the rib(s) may be interrupted along their length, and/or, any one or more of them may extend only part way along the entire length of the composite article. It is important that the ribs as a collective whole extend substantially the entire length of the tubular article because where there are no ribs, there is no structure to maintain the spacing between the inner and the outer tubes. Under these circumstances, the composite tubular article could be crushed and collapse, under the radial stress of the flat goods rolled thereon, whereby defeating the entire purpose of this invention.
  • the ribs can be generally rectangular in cross section, but this geometric shape is not an absolute requirement of this invention.
  • the ribs may have a triangular or trapezoidal, or any other desired, cross section.
  • the ribs may be substantially constant in cross section and area over their entire length, the cross sectional area and/or geometry of the rib(s) may change over the length of the composite tube.
  • the geometry and cross section may also, or alternatively, change from rib to rib, as appropriate. Any combination of these parameters is considered to be within the scope of this invention.
  • the preferred mode of operation of this invention is to provide a plurality of ribs substantially uniformly angularly distributed about the periphery of the outside surface of the inner tube (and consequently about the inner surface of the outer tube).
  • the " cross section of each rib is preferably the same from rib to rib and along the entire length of the ribs, and is substantially rectangular.
  • the cells formed between the next adjacent ribs and the walls of the inner and outer tubes may be generally triangular in cross section, but are preferably all substantially trapezoidal in cross section.
  • the trapezoidal shapes of this embodiment of this invention give up some of their strength in exchange for lighter weight and lower cost (because of less material being used). It is therefore preferred that the length of the smaller leg of the frapezoid be no more than about 10% of the length of the longer leg of the trapezoid.
  • these trapezoidal legs that are being referred to here are not straight as in the real trapezoid geometric shape, but rather are segments of the arcuate walls of the inner and outer tubes.
  • the truss sections are therefore geometric shapes that approach a trapezoid, rather than actually being an exact trapezoid.
  • the inner and outer walls are preferably concentric, but they may depart- from absolute " concentricity in that one or the other may be eccentric, that is not of circular cross section.
  • the tubular walls may be out of concentricity by both of the tubular walls being of circular cross section but having centers that are not coincident.
  • the ribs must be of such a size and shape as to follow any eccentricity that may exist.
  • Concentric will be applied to the inner and outer tubes of this invention in this specification and the claims appended hereto in this broad sense, that is sufficiently concentric to accomplish the purposes of this invention, but not necessarily absolutely concentric.
  • the term, "concentric” should therefore not be taken as a structural limitation on the articles of this invention but rather as a description of the relationship between the walls as beinginner and outer.
  • the inner and outer walls of the composite tubes of this invention may be the same or different, but are preferably of circular cross section. Their cross sections may be of other shapes, such as elliptical, or for that matter any shape that suits the ultimate use to which the core will be put.
  • Of great important to the article of this invention is the disposition of longitudinal ribs between, and joining, the inner and outer tubes, and supporting each of them.
  • the forces acting on the hollow wall cores when pressed between flat, diametrically opposed plates is to compress the outer wall Of the portions of the core that are in contact with the pressure plates of the vise, and to compress the inner wall in those locations that are 90° from the points where the pressure is being applied. It is these specific inner and outer wall segments, respectively, that buckle first. Where the ribs are generally longitudinal in disposition, the wall buckling progresses all the way down the length of the composite structure of this invention between the ribs as aforesaid.
  • the ribs are disposed in a helical pattern along the length of the toroidal space between the inner and the outer tubes.
  • a buckling of any one rib element by reason of pressure being applied in the radial direction between flat plates, will not have an unimpeded longitudinal path from one end of the composite tube structure of this invention to the other.
  • the ribs pass helically about the hollow inner wall, they form places where they will be disposed directly in the path of the pressure being applied by the opposing flat plates as aforesaid, and will thereby act as a stop to the progression of buckling.
  • composite tube of this invention having helical ribs as aforesaid, is that they unobviously show better consistency of diametral dimension, e.g. the roundness, in the case of a circular cylindrical composite tube, as compared to composite tubes made using ribs that are merely longitudinal, and not helically disposed about the length of the composite tube, assuming the manufacturing precision is the same in both cases.
  • these.same considerations apply regardless of the cross sectional shape of the ribs, or their being radial or off-radial, as has been described herein.
  • the helical ribs can be disposed radially between the inner and outer walls in a position that is normal to both walls. They are preferably disposed "off-radial” so as to form helically disposed triangular or trapezoidal trusses. They can most preferably be disposed so as to form substantially trapezoidal truss shapes as aforesaid. In all of these cases, the same considerations as have been set forth above apply.
  • the inner and outer tubes are extruded in a linear direction, with the inner and outer tubes being generally concentric to each other.
  • the rib forming material is disposed by simultaneous extrusion in the same manner as in making longitudinal radial or "off-radial" ribs.
  • the hollow walled composite tube is simultaneously taken away and twisted at a speed sufficient to draw down the walls to their desired final thickness as well as form the ribs into their desired helical pitch.
  • the speed of extrusion and the speed of twisting of the extrudate must be closely coordinated to insure that the helical ribs are properly formed.
  • the novel puller of this invention comprises a belt wound helically around the extruded tubular product. As the belt is driven, it pulls the tube downstream and simultaneously rotates it.
  • One difficulty encountered by this operation is that the tension on the belt inherently applies sideways forces that tend to bend the tube.
  • this problem is solved by applying a second belt intertwined with the first belt, that exerts a longitudinal force in the same direction, but is out of phase with the first belt such that the sideways forces it applies to the tubular product are directly opposite to those of the first belt, effectively countering the bending forces being exerted by the first belt.
  • This operation has the added advantage of applying a generally uniform radial squeeze so there is no flattening of the tube during pulling and twisting it..
  • the extrudate material may be plastic or metal.
  • Polyethylene and polystyrene have worked well but there does not appear to be any specific limitation on the nature of the material being used to make the hollow wall cores of this invention so long as it is reasonably extrudable.
  • the extrudability of the material is the prime consideration. Any material that extrudes well and solidified fairly rapidly, but not instantaneously, will serve as a suitable material from which to make the hollow wall composite tubes of this invention. If needed, auxiliary heat may be applied to maintain the extruded composite tube at the proper temperature to permit it to be rotated to form the ribs into helices.
  • the ribs may be made of the same material as either the inner or the outer tube, or of a completely different material.
  • the composite tubular structure of this invention is made, it is preferably cut into lengths, as appropriate. It may also be coiled into a substantially endless length of composite tubing as is conventional in the art.
  • the tube can be cut without stopping the extrusion by using a cutter that may be suitably mounted to a carriage that travels along with the moving tube.
  • a cutter that may be suitably mounted to a carriage that travels along with the moving tube.
  • the carriage may be suitably mounted to a carriage that travels along with the moving tube.
  • provision must be made to have the carriage move linearly at the same linear speed as the tube, yet allow the tube to rotate relative to the carriage.
  • One way that this can be done is by using a set of wheels on the carriage with their axes parallel to the tube axis, to clamp the tube during cutting. If it is permitted or desirable to stop the extrusion process a non-helical cutter may be used.
  • the composite tube of this invention is a suitable starting material from which to produce a novel toy. It has been found that it is possible to cut the composite tube of this invention about a helical path while it is being longitudinally extruded, or thereafter, with or without imparting helical twist to the ribs thereof.
  • This novel product is an unusually decorative "slinky". If the composite tube of this invention is cut along a helical line with a relatively short flight, the resulting article has the resiliency of a spring and can be suitably stretched and/or compressed in an axial direction. This article has flights that have a cross section that includes some number of ribs that have been cut along with the rest of the composite tube.
  • the helical cutter has the same flight as the helical ribs, it is possible to make a slinky with a continuous toroidal rib.
  • the ribs maintain the spacing between the inner and the outer tube of each fight of the cut helix. It will be clear that the direction and flight distance of the helical cut must be coordinated with the pulling and twisting forces that are being applied to the extruded tube so that there is sufficient rib material to maintain the integrity of the composite walled structure in its spring shape.
  • Fig. 1 is a perspective view of a hollow two walled tubular article with radial ribs
  • Fig. 2 is a perspective view of a hollow two walled tubular article with "off- radial" ribs forming generally triangular truss members
  • Fig. 3 is a perspective view, with portions cut away, of a hollow two walled tubular article with helically disposed "off-radial" ribs forming triangular truss members;
  • Fig. 4 is a perspective view of a hollow two walled article with "off-radial" ribs arranged to form trapezoidal truss members;
  • Fig. 5 is a top view of an apparatus suited to pull tubular extrusions away from the extruder and twist the same into a helical form suited to forming the product shown in Fig.3;
  • Fig. 6 is a front elevation of the apparatus shown in Fig. 5;
  • Fig. 7 is a top view of an apparatus using two intertwined pullers to pull tubular extrusions away from the extruder and twist the same into a helical form suited to forming the product shown in Fig.3 without exerting undue sideways forces on the tube;
  • Fig. 8 is a front elevation of the apparatus shown in Fig. 7
  • Fig. 9 is a perspective view of a "slinky" spring like article according to this invention.
  • Fig.10 is a sectional end view of a cutter acting on the composite tube of this invention DETAILED DESCRIPTION OF THIS INVENTION
  • a composite tube 10 is made up of an inner tube 12, an outer tube 14 and a plurality of ribs 16 therebetween.”
  • a modified composite tube 20 of this invention is made up of an inner tube 22, and outer tube 24, a set of "left handed” "off radial” ribs 26 and an alternating set of right handed" "off-radial” ribs 28. Note that the combination of the inner tube, the outer tube and the two sets of ribs forms generally triangular truss cells 29. Referring to Fig.
  • a further modified composite tube 40 of this invention is made up of an inner tube 42, an outer tube 44, and a series of left and right handed alternating "off-radial ribs 46 and 48, respectively. Note that the left and right handed ribs contact and are joined to the inner and outer tubes, respectively, out of contact with each other. This is to be compared to the structure shown in Fig. 2 where the left and right handed ribs contact each other at the same place as they contact the inner and outer tubes, respectively. In Fig. 4, the truss cells 49 that have been created have a generally trapezoidal cross section.
  • a composite tube 40 of this invention that has a cross section that is similar to that shown in Fig. 2.
  • the composite tube 40 whose cross section was shown in Fig. 2, has been twisted to cause the ribs 46 and 48 to have a helical form.
  • FIGs. 5 and 6 there is shown an apparatus for forming a composite tube having helical rib structures according to this invention.
  • the extruded composite tube 50 is proceeding from right to left in this figure.
  • a driven belt 52 is relatively tightly wrapped around the composite tube 50 in a helical configuration, and means 54 are provided for driving the belt whereby twisting the composite tube such that the internal ribs (not shown in this figure) conform to the shape depicted in figure 3.
  • Figs. 7 and 8 show an apparatus that is similar to that shown in Figs. 5 and 6 but with two intertwined belts 62 and 62, both pulling and rotating the tube 50 in the same direction.
  • the first belt 52 exerts lateral forces 52a and 52b on the tube 50 which are axially displaced from each other, thus providing a bending moment on the tube 50.
  • the bending forces are exactly equal and opposite to, and are thereby canceled by, the forces 62a and 62b that are being exerted by the belt 62. The result is that there is no total bending moment applied to the tube 50 by the twisting mechanism of this aspect of this invention.
  • the nature of the material of the driving belt is not particularly critical. Its surface should have sufficient coefficient of friction relative to the material of the extruded composite tube that it will be able to drive the tube without crushing or marring its surface. In most instances, the surface of the drive belt will be smooth so that it does not mar the surface of the composite tube. However, the driving belt may be used to impart a profiling to the surface of the composite tube.
  • the composite tube 70 is made up of an inside wall 72, an outside wall 74, and ribs 76 disposed in supporting relationship therebetween, and forming suitably shaped truss cells 78.
  • the composite tube 70 is suitable helically cut, using a rotating cutter 80 so as to form a helix 82 having a plurality of flights 84.
  • the helix can be stretched in a longitudinal directions in the same way that a spring is sfretchable, but it is reasonably rigid in the transverse direction. It is possible to make the ribs and the inner and outer tubes from the same materials and in the same colors. It is preferred, however, to make these elements of different color materials so as to add to their eye appeal.

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  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Extrusion Moulding Of Plastics Or The Like (AREA)

Abstract

L'invention concerne un tube composite allongé composé d'un tube intérieur (42) en figure 3 et d'un tube extérieur (44). Une pluralité de nervures allongées (46 ) situées entre les tubes intérieur et extérieur maintient les tubes entre eux dans un rapport radial et axial fixe. Dans un mode préféré de réalisation, les nervures sont disposées à des angles alternants différents de la perpendiculaire par rapport aux tubes intérieur et extérieur, et forment des cellules allongés en treillis (49), chaque cellule étant bordée par deux nervures adjacentes et par une partie du tube intérieur ou extérieur. Cette invention concerne également un nouveau jouet à forme ondulante, fabriqué en coupant de manière hélicoïdale le tube composite afin de produire une pluralité de spires à configuration de type ressort. Elle porte, en outre, sur un procédé servant à fabriquer ce type de tube composite à nervures hélicoïdales.
PCT/US1999/017172 1998-08-12 1999-07-29 Structure a double paroi pour mandrin nervure WO2000009317A1 (fr)

Priority Applications (5)

Application Number Priority Date Filing Date Title
AU53256/99A AU5325699A (en) 1998-08-12 1999-07-29 Ribbed core dual wall structure
US09/626,886 US6405974B1 (en) 1998-08-12 2000-07-27 Ribbed core dual wall structure
US10/139,208 US6955780B2 (en) 1998-08-12 2002-05-07 Multi-wall cylindrical structure, method of making such structure, and apparatus for carrying out such method
US10/366,652 USRE39521E1 (en) 1998-08-12 2003-02-14 Ribbed core dual wall structure
US11/154,018 US7140859B2 (en) 1998-08-12 2005-06-17 Apparatus for making a multi-walled tubular structure

Applications Claiming Priority (4)

Application Number Priority Date Filing Date Title
US9623798P 1998-08-12 1998-08-12
US60/096,237 1998-08-12
US10193598P 1998-09-25 1998-09-25
US60/101,935 1998-09-25

Related Child Applications (1)

Application Number Title Priority Date Filing Date
US09/626,886 Continuation US6405974B1 (en) 1998-08-12 2000-07-27 Ribbed core dual wall structure

Publications (2)

Publication Number Publication Date
WO2000009317A1 true WO2000009317A1 (fr) 2000-02-24
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Cited By (12)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2003013826A2 (fr) * 2001-08-03 2003-02-20 Proteus, Inc. Procede de production et appareil destine a la realisation d'un tube a nervures helicoidales
WO2004063073A1 (fr) * 2003-01-16 2004-07-29 Michael James Bayliss Procede et fabrication de mandrins
EP1469934A2 (fr) * 2002-01-29 2004-10-27 Amersham Biosciences Membrane Separations Corp. Membranes de fibres creuses a surface spiralee
US6955780B2 (en) 1998-08-12 2005-10-18 Proteus, Inc. Multi-wall cylindrical structure, method of making such structure, and apparatus for carrying out such method
USRE39251E1 (en) * 2000-08-16 2006-08-29 Bristol-Myers Squibb Co. Polymorphs of an epothilone analog
CN101799096A (zh) * 2010-04-19 2010-08-11 崇州市岷江塑胶有限公司 空壁螺旋消音管材及其制备方法
CN103502712A (zh) * 2011-04-20 2014-01-08 马勒国际有限公司 有连接接管的空心体
WO2014106072A1 (fr) * 2012-12-28 2014-07-03 Gyre Innovations Lp Structure tubulaire à parois multiples extrudée
WO2014193478A1 (fr) * 2013-05-28 2014-12-04 Gyre Innovations Lp Appareil et procédé de production d'une structure multitubulaire
US9022207B2 (en) 2012-12-28 2015-05-05 Gyre Innovations Lp Conveyor system bridge
CN111438916A (zh) * 2020-04-08 2020-07-24 华南理工大学 一种旋转管材定型牵引装置及其方法
WO2022016208A1 (fr) * 2020-07-23 2022-01-27 Prok Conveyor Components Pty Ltd Tube de rouleau de transporteur

Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4509447A (en) * 1981-07-10 1985-04-09 Universal Spiralweld Enterprises, Inc. Helical seamed structural vessel and method of forming same
US4689174A (en) * 1983-07-12 1987-08-25 Lupke Manfred Arno Alfred Producing double-walled helically wound thermoplastic pipe with a corrugated cutter wall and a smooth inner wall
US5127441A (en) * 1985-12-16 1992-07-07 Rains Robert L Coaxial piping system
US5423353A (en) * 1993-09-17 1995-06-13 Sorensen; Jeff Hose

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4509447A (en) * 1981-07-10 1985-04-09 Universal Spiralweld Enterprises, Inc. Helical seamed structural vessel and method of forming same
US4689174A (en) * 1983-07-12 1987-08-25 Lupke Manfred Arno Alfred Producing double-walled helically wound thermoplastic pipe with a corrugated cutter wall and a smooth inner wall
US5127441A (en) * 1985-12-16 1992-07-07 Rains Robert L Coaxial piping system
US5423353A (en) * 1993-09-17 1995-06-13 Sorensen; Jeff Hose

Cited By (20)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US6955780B2 (en) 1998-08-12 2005-10-18 Proteus, Inc. Multi-wall cylindrical structure, method of making such structure, and apparatus for carrying out such method
US7140859B2 (en) 1998-08-12 2006-11-28 Protens, Inc. Apparatus for making a multi-walled tubular structure
USRE39251E1 (en) * 2000-08-16 2006-08-29 Bristol-Myers Squibb Co. Polymorphs of an epothilone analog
WO2003013826A2 (fr) * 2001-08-03 2003-02-20 Proteus, Inc. Procede de production et appareil destine a la realisation d'un tube a nervures helicoidales
WO2003013826A3 (fr) * 2001-08-03 2003-05-22 Proteus Inc Procede de production et appareil destine a la realisation d'un tube a nervures helicoidales
US7550102B2 (en) 2001-08-03 2009-06-23 Proteus, Inc. Method for producing a helically shaped, seamless multi-walled cylindrical article
EP1469934A2 (fr) * 2002-01-29 2004-10-27 Amersham Biosciences Membrane Separations Corp. Membranes de fibres creuses a surface spiralee
EP1469934A4 (fr) * 2002-01-29 2005-09-07 Amersham Biosciences Membrane Membranes de fibres creuses a surface spiralee
WO2004063073A1 (fr) * 2003-01-16 2004-07-29 Michael James Bayliss Procede et fabrication de mandrins
CN101799096A (zh) * 2010-04-19 2010-08-11 崇州市岷江塑胶有限公司 空壁螺旋消音管材及其制备方法
CN103502712A (zh) * 2011-04-20 2014-01-08 马勒国际有限公司 有连接接管的空心体
WO2014106072A1 (fr) * 2012-12-28 2014-07-03 Gyre Innovations Lp Structure tubulaire à parois multiples extrudée
US9022207B2 (en) 2012-12-28 2015-05-05 Gyre Innovations Lp Conveyor system bridge
US9022210B2 (en) 2012-12-28 2015-05-05 Gyre Innovations Lp Conveyor system lifter assembly
US9052039B2 (en) 2012-12-28 2015-06-09 Gyre Innovations Lp Extruded multiwall tubular structure
WO2014193478A1 (fr) * 2013-05-28 2014-12-04 Gyre Innovations Lp Appareil et procédé de production d'une structure multitubulaire
US9358599B2 (en) 2013-05-28 2016-06-07 Gyre Innovations Lp Apparatus for producing a tubular structure
CN111438916A (zh) * 2020-04-08 2020-07-24 华南理工大学 一种旋转管材定型牵引装置及其方法
CN111438916B (zh) * 2020-04-08 2021-03-16 华南理工大学 一种旋转管材定型牵引装置及其方法
WO2022016208A1 (fr) * 2020-07-23 2022-01-27 Prok Conveyor Components Pty Ltd Tube de rouleau de transporteur

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