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WO2002099218A1 - Element composite leger, procede de fabrication et utilisation - Google Patents

Element composite leger, procede de fabrication et utilisation Download PDF

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Publication number
WO2002099218A1
WO2002099218A1 PCT/CH2002/000276 CH0200276W WO02099218A1 WO 2002099218 A1 WO2002099218 A1 WO 2002099218A1 CH 0200276 W CH0200276 W CH 0200276W WO 02099218 A1 WO02099218 A1 WO 02099218A1
Authority
WO
WIPO (PCT)
Prior art keywords
knobbed
sheets
welded
knobs
lightweight composite
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.)
Ceased
Application number
PCT/CH2002/000276
Other languages
German (de)
English (en)
Inventor
Mehdi Farshad
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.)
Eidgenoessische Materialpruefungs und Forschungsanstalt
Original Assignee
Eidgenoessische Materialpruefungs und Forschungsanstalt
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 Eidgenoessische Materialpruefungs und Forschungsanstalt filed Critical Eidgenoessische Materialpruefungs und Forschungsanstalt
Publication of WO2002099218A1 publication Critical patent/WO2002099218A1/fr
Anticipated expiration legal-status Critical
Ceased legal-status Critical Current

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
    • 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
    • B29C65/34—Joining or sealing of preformed parts, e.g. welding of plastics materials; Apparatus therefor by heating, with or without pressure using heated elements which remain in the joint, e.g. "verlorenes Schweisselement"
    • B29C65/3404—Joining or sealing of preformed parts, e.g. welding of plastics materials; Apparatus therefor by heating, with or without pressure using heated elements which remain in the joint, e.g. "verlorenes Schweisselement" characterised by the type of heated elements which remain in the joint
    • B29C65/3436—Joining or sealing of preformed parts, e.g. welding of plastics materials; Apparatus therefor by heating, with or without pressure using heated elements which remain in the joint, e.g. "verlorenes Schweisselement" characterised by the type of heated elements which remain in the joint comprising independent continuous fibre-reinforcements
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • 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
    • 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
    • B29C65/34—Joining or sealing of preformed parts, e.g. welding of plastics materials; Apparatus therefor by heating, with or without pressure using heated elements which remain in the joint, e.g. "verlorenes Schweisselement"
    • B29C65/3404—Joining or sealing of preformed parts, e.g. welding of plastics materials; Apparatus therefor by heating, with or without pressure using heated elements which remain in the joint, e.g. "verlorenes Schweisselement" characterised by the type of heated elements which remain in the joint
    • B29C65/344—Joining or sealing of preformed parts, e.g. welding of plastics materials; Apparatus therefor by heating, with or without pressure using heated elements which remain in the joint, e.g. "verlorenes Schweisselement" characterised by the type of heated elements which remain in the joint being a woven or non-woven fabric or being a mesh
    • 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
    • B29C65/74—Joining or sealing of preformed parts, e.g. welding of plastics materials; Apparatus therefor by welding and severing, or by joining and severing, the severing being performed in the area to be joined, next to the area to be joined, in the joint area or next to the joint area
    • B29C65/743—Joining or sealing of preformed parts, e.g. welding of plastics materials; Apparatus therefor by welding and severing, or by joining and severing, the severing being performed in the area to be joined, next to the area to be joined, in the joint area or next to the joint area using the same tool for both joining and severing, said tool being monobloc or formed by several parts mounted together and forming a monobloc
    • B29C65/7435—Joining or sealing of preformed parts, e.g. welding of plastics materials; Apparatus therefor by welding and severing, or by joining and severing, the severing being performed in the area to be joined, next to the area to be joined, in the joint area or next to the joint area using the same tool for both joining and severing, said tool being monobloc or formed by several parts mounted together and forming a monobloc the tool being a roller
    • 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
    • B29C65/74—Joining or sealing of preformed parts, e.g. welding of plastics materials; Apparatus therefor by welding and severing, or by joining and severing, the severing being performed in the area to be joined, next to the area to be joined, in the joint area or next to the joint area
    • B29C65/743—Joining or sealing of preformed parts, e.g. welding of plastics materials; Apparatus therefor by welding and severing, or by joining and severing, the severing being performed in the area to be joined, next to the area to be joined, in the joint area or next to the joint area using the same tool for both joining and severing, said tool being monobloc or formed by several parts mounted together and forming a monobloc
    • B29C65/7437—Joining or sealing of preformed parts, e.g. welding of plastics materials; Apparatus therefor by welding and severing, or by joining and severing, the severing being performed in the area to be joined, next to the area to be joined, in the joint area or next to the joint area using the same tool for both joining and severing, said tool being monobloc or formed by several parts mounted together and forming a monobloc the tool being a perforating tool
    • 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
    • B29C66/01—General aspects dealing with the joint area or with the area to be joined
    • B29C66/05—Particular design of joint configurations
    • B29C66/10—Particular design of joint configurations particular design of the joint cross-sections
    • B29C66/11—Joint cross-sections comprising a single joint-segment, i.e. one of the parts to be joined comprising a single joint-segment in the joint cross-section
    • B29C66/114—Single butt joints
    • B29C66/1142—Single butt to butt joints
    • 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
    • B29C66/01—General aspects dealing with the joint area or with the area to be joined
    • B29C66/05—Particular design of joint configurations
    • B29C66/20—Particular design of joint configurations particular design of the joint lines, e.g. of the weld lines
    • B29C66/21—Particular design of joint configurations particular design of the joint lines, e.g. of the weld lines said joint lines being formed by a single dot or dash or by several dots or dashes, i.e. spot joining or spot welding
    • 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
    • B29C66/50—General aspects of joining tubular articles; General aspects of joining long products, i.e. bars or profiled elements; General aspects of joining single elements to tubular articles, hollow articles or bars; General aspects of joining several hollow-preforms to form hollow or tubular articles
    • B29C66/51—Joining tubular articles, profiled elements or bars; Joining single elements to tubular articles, hollow articles or bars; Joining several hollow-preforms to form hollow or tubular articles
    • B29C66/54—Joining several hollow-preforms, e.g. half-shells, to form hollow articles, e.g. for making balls, containers; Joining several hollow-preforms, e.g. half-cylinders, to form tubular articles
    • 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
    • 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
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B32—LAYERED PRODUCTS
    • B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
    • B32B3/00—Layered products comprising a layer with external or internal discontinuities or unevennesses, or a layer of non-planar shape; Layered products comprising a layer having particular features of form
    • B32B3/26—Layered products comprising a layer with external or internal discontinuities or unevennesses, or a layer of non-planar shape; Layered products comprising a layer having particular features of form characterised by a particular shape of the outline of the cross-section of a continuous layer; characterised by a layer with cavities or internal voids ; characterised by an apertured layer
    • B32B3/28—Layered products comprising a layer with external or internal discontinuities or unevennesses, or a layer of non-planar shape; Layered products comprising a layer having particular features of form characterised by a particular shape of the outline of the cross-section of a continuous layer; characterised by a layer with cavities or internal voids ; characterised by an apertured layer characterised by a layer comprising a deformed thin sheet, i.e. the layer having its entire thickness deformed out of the plane, e.g. corrugated, crumpled
    • E—FIXED CONSTRUCTIONS
    • E04—BUILDING
    • E04C—STRUCTURAL ELEMENTS; BUILDING MATERIALS
    • E04C2/00—Building elements of relatively thin form for the construction of parts of buildings, e.g. sheet materials, slabs, or panels
    • E04C2/30—Building elements of relatively thin form for the construction of parts of buildings, e.g. sheet materials, slabs, or panels characterised by the shape or structure
    • E04C2/32—Building elements of relatively thin form for the construction of parts of buildings, e.g. sheet materials, slabs, or panels characterised by the shape or structure formed of corrugated or otherwise indented sheet-like material; composed of such layers with or without layers of flat sheet-like material
    • E04C2/326—Building elements of relatively thin form for the construction of parts of buildings, e.g. sheet materials, slabs, or panels characterised by the shape or structure formed of corrugated or otherwise indented sheet-like material; composed of such layers with or without layers of flat sheet-like material with corrugations, incisions or reliefs in more than one direction of the element
    • 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
    • B29C2793/00—Shaping techniques involving a cutting or machining operation
    • B29C2793/0045—Perforating
    • 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
    • B29C65/34—Joining or sealing of preformed parts, e.g. welding of plastics materials; Apparatus therefor by heating, with or without pressure using heated elements which remain in the joint, e.g. "verlorenes Schweisselement"
    • B29C65/3472—Joining or sealing of preformed parts, e.g. welding of plastics materials; Apparatus therefor by heating, with or without pressure using heated elements which remain in the joint, e.g. "verlorenes Schweisselement" characterised by the composition of the heated elements which remain in the joint
    • B29C65/3476—Joining or sealing of preformed parts, e.g. welding of plastics materials; Apparatus therefor by heating, with or without pressure using heated elements which remain in the joint, e.g. "verlorenes Schweisselement" characterised by the composition of the heated elements which remain in the joint being metallic
    • 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
    • B29C65/34—Joining or sealing of preformed parts, e.g. welding of plastics materials; Apparatus therefor by heating, with or without pressure using heated elements which remain in the joint, e.g. "verlorenes Schweisselement"
    • B29C65/3472—Joining or sealing of preformed parts, e.g. welding of plastics materials; Apparatus therefor by heating, with or without pressure using heated elements which remain in the joint, e.g. "verlorenes Schweisselement" characterised by the composition of the heated elements which remain in the joint
    • B29C65/3484—Joining or sealing of preformed parts, e.g. welding of plastics materials; Apparatus therefor by heating, with or without pressure using heated elements which remain in the joint, e.g. "verlorenes Schweisselement" characterised by the composition of the heated elements which remain in the joint being non-metallic
    • B29C65/3492—Joining or sealing of preformed parts, e.g. welding of plastics materials; Apparatus therefor by heating, with or without pressure using heated elements which remain in the joint, e.g. "verlorenes Schweisselement" characterised by the composition of the heated elements which remain in the joint being non-metallic being carbon
    • 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
    • B29C66/40—General aspects of joining substantially flat articles, e.g. plates, sheets or web-like materials; Making flat seams in tubular or hollow articles; Joining single elements to substantially flat surfaces
    • B29C66/41—Joining substantially flat articles ; Making flat seams in tubular or hollow articles
    • B29C66/43—Joining a relatively small portion of the surface of said articles
    • B29C66/438—Joining sheets for making hollow-walled, channelled structures or multi-tubular articles
    • 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
    • B29C66/8351—Jaws mounted on rollers, cylinders, drums, bands, belts or chains; Flying jaws
    • B29C66/83511—Jaws mounted on rollers, cylinders, drums, bands, belts or chains; Flying jaws jaws mounted on rollers, cylinders or drums
    • 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

Definitions

  • the present invention relates to a lightweight composite element for a wide variety of uses, as well as a method for its manufacture. Finally, some special uses of this lightweight composite element are shown.
  • Lightweight composite elements have been known for a long time and they are made in different constructions and from different materials.
  • sandwich constructions or of constructions that include a sandwich as the core.
  • Such a sandwich essentially consists of two spaced-apart plates or plate-like elements which are connected to one another via intermediate spacers.
  • These spacers are usually of such a shape that they can absorb considerable compressive forces, that is to say the plates connected by them and kept apart from them can withstand large contact pressures.
  • the spacers ensure the absorption of displacement forces, that is to say the limiting plates can no longer be displaced relative to one another in their direction of travel.
  • the greater the normal distance between the plates of such an element the greater the bending stiffness of such a composite element in general.
  • a typical application example are aluminum sheets, which are connected by means of an aluminum structure, for example in the form of honeycombs. With comparatively thin sandwich elements with a minimal weight, maximum bending rigidity and load-bearing capacity are obtained. Such sandwich panels are therefore used, for example, as aircraft interior floors. There are a multitude of other applications, with different materials and special constructions of the respective structure of the composite elements. However, two or more plates are always connected to one another at a distance from one another.
  • a lightweight composite element which is characterized in that it is composed of at least two dimpled sheets or dimpled sheets made of plastic, that is, made of plastic sheets or sheets, of which a number on at least one side Knobs are formed, and which knob films or plates are firmly welded or glued to one another with the knobs directed towards one another.
  • the object is achieved on the other hand by a method for producing a lightweight composite element, which is characterized in that at least two dimpled sheets or sheets made of plastic, that is, at least two plastic sheets or sheets, from which on at least one side a number of knobs are formed, are guided past a machine from a roll or from a stack and are welded or glued to one another as the vehicle drives past.
  • the object is achieved by the use of the lightweight composite element, which consist of at least two dimpled sheets or plates made of plastic, that is to say made of at least two plastic films or sheets, from which a number of knobs are formed on at least one side, and which studded film or sheets are firmly welded or glued to one another with the studs facing each other, for the creation of wall panels, partitions and insulating walls, as well as a supporting plate in building, civil engineering and tunnel construction as well as in vehicle construction.
  • the lightweight composite element consist of at least two dimpled sheets or plates made of plastic, that is to say made of at least two plastic films or sheets, from which a number of knobs are formed on at least one side, and which studded film or sheets are firmly welded or glued to one another with the studs facing each other, for the creation of wall panels, partitions and insulating walls, as well as a supporting plate in building, civil engineering and tunnel construction as well as in vehicle construction.
  • Figure 1 A knobbed film made of polyethylene as a basic element for the production of these lightweight composite elements
  • Figure 2 A first variant of a lightweight composite element of minimal thickness from two polyethylene knobbed sheets or foils;
  • Figure 3 A second variant of a lightweight composite element of maximum thickness made of two polyethylene knobbed sheets or foils;
  • Figure 4 A lightweight composite element according to the structure of Figure 3 in preparation for the application of cover plates;
  • Figure 5 A lightweight composite element according to the structure of Figure 3 with top and bottom welded cover plates as a finished sandwich panel;
  • FIG. 6 A lightweight composite element in the form of a shell element made of two knobbed foils connected to one another in accordance with FIG. 2 and welded to one another in a curved manner;
  • Figure 7 A schematic representation of the continuous production of a flat lightweight composite element from at least two plastic knobbed films.
  • Figure 1 shows a knobbed film made of plastic. It is characterized in that it has a number of knobs 1 on at least one side.
  • the film can be made from various plastics and can also be in the form of a plate instead of a bendable film.
  • Polyethylene will preferably be used because polyethylene is a thermoplastic that is easy to machine and weld, that is very durable and, on top of that, is relatively light with a specific weight of 950kg / m 3 . In addition, its surface is largely scratch-resistant and weatherproof.
  • Other plastics, such as polypropylene or GRP can also be used for special applications.
  • Such knobbed films are already produced “endlessly” in large quantities, that is to say they are available in rolls. But knobbed sheets are also commercially available.
  • the knobs 1 are formed, for example, by means of a deep-drawing process from the sheet or sheet material by heating it and the soft material is then sucked over an appropriately shaped tool, from which it is removed again after cooling,
  • the pattern shown in Figure 1 can be bent elastically.
  • the film material has a thickness of approximately 0.5 mm and the size of the knobs can be compared to that of Hand holding the knobbed film in this curved position and is also shown.
  • foils and plates of considerably thicker or weaker thickness and with less dense and or differently shaped knobs.
  • the knobs can be higher or lower.
  • the knobs can also be conical, hemispherical or pyramidal or form truncated pyramids.
  • knobs 1 taper uniformly on all sides towards their end, because they are then able to absorb large compressive forces.
  • the film or plate having knobs 1 on only one side it can also have knobs on both sides, in which case the knot density is of course somewhat reduced on both sides.
  • FIG 2 is now presented a first variant of the lightweight composite element made of two such dimpled polyethylene films as shown in Figure 1.
  • two knobbed foils 2, 3 have been placed on top of one another in such a way that their knobs 4, 5 are directed towards one another and the knobs 4 of one foil 2 each engage in the spaces between the knobs 5 of the adjacent foil 3.
  • the ends of all the knobs 4, 5 are then welded to the foil 2, 3 lying against them. It has been shown that a weld alone, which results in a very strong connection of the two foils 2, 3 simply by piercing the foil together with the adjacent knob end wall, and that a sufficiently stable lightweight composite element is produced.
  • Simultaneous welding at all points of a composite element to be produced can therefore be achieved by using a needle board with hot needle tips.
  • the welding can be carried out in the form of a perfect spot weld.
  • Hot, bolt-like stamps are moved together from both sides to a defined distance, i.e. in the picture from above onto the upper plate and from below into the interior of the knobs, while maintaining a distance of the order of between one to a maximum of two plate thicknesses or film thicknesses.
  • Corresponding stamps also attack the film from below and into the knobs of the upper film from above. If you use foils with nubs on both sides, so Not only can two foils be connected in this way, but an entire stack of any height.
  • Figure 3 shows a second variant of the lightweight composite element made of two polyethylene knobbed films or sheets.
  • the two polyethylene stud sheets or plates are connected to one another in such a way that the studs 4, 5 facing each other meet with their ends and are welded to one another at these points.
  • the welding is also carried out either by piercing the two abutting knob ends or by means of thermal spot welding.
  • the cross wires are also heated as a result of heat conduction within the grid wire.
  • an electrically conductive mesh made of carbon fiber reinforced plastic can be used, as already described above, which is sufficient it is electrically heatable that the adjacent surfaces are welded together.
  • the mesh not only acts as a thermal welding element, but also as a reinforcement for absorbing tensile forces.
  • this connection can also be realized with foils which have knobs on both sides and thus a stack with several foils can be welded together to form a lightweight composite element.
  • the lightweight composite element according to FIG. 2 the one shown here has a much greater flexural rigidity due to the double spacing of the knobbed foils or plates.
  • Such composite elements although they have a surface provided with recess holes on both sides as a result of the knobs, can already be used for many purposes.
  • Figure 4 shows a second variant of a lightweight composite element according to the structure of Figure 3 in preparation for the application of cover plates.
  • a wire loop 6 has been placed over the surface, which in principle is flat here, which meanders from one edge to the other of the element.
  • An electrical voltage can be applied to this wire loop 6, after which the wire acts as a heating loop as a result of resistance heating and cause the plastic to melt.
  • a plastic plate made of the same plastic material as the composite element is placed on the flat surface and the heating loop 6. Then an electrical voltage is applied for a certain period of time and the plate is pressed onto the composite element, whereby an electrical welding is achieved between the composite element and the plate placed thereon.
  • a more or less fine-meshed wire mesh can be used instead of a heating loop, which is heated in the same way by applying a voltage as a whole.
  • the cross wires are also heated as a result of heat conduction within the grid wire.
  • a plastic plate is also welded onto the opposite side of the composite element.
  • an electrically conductive mesh mesh can also be used carbon fiber-reinforced plastic are used, which is sufficiently electrically heatable that the adjacent surfaces are welded together. In this case, the mesh not only acts as a thermal welding element, but also as a particularly light and strong reinforcement for absorbing tensile forces.
  • FIG. 5 shows a lightweight composite element according to the structure of Figure 3 with welded top and bottom cover plates 7,8 as a finished sandwich panel.
  • a sandwich panel can easily be produced in any size and extremely inexpensively.
  • the possible uses are extremely varied, because it has a number of particularly favorable properties. So its specific weight is lower than water and therefore it swims. The space between them is permeable to water. Water or another flowable medium, in particular also a gas, can therefore flow longitudinally to the cover plates within the sandwich plate. Free air spaces are formed between the cover plates.
  • the sandwich panel therefore has a good insulation effect with regard to sound and heat. Measured by its weight, it has an extremely high level of flexural rigidity. This sandwich plate is also very easy and practical to work with.
  • a number of sandwich panels can be firmly connected to one another by means of thermal welding along their edges or elsewhere, for example by means of mirror welding or by gluing. By welding wire mesh as heating elements for the thermal welding, they also act as reinforcement and increase the tensile strength of the sandwich panels. If a particularly good reinforcement effect is to be achieved, the entire composite element structure can also be reinforced by lamination with thermosetting or thermoplastic reinforcing fabric or by means of plastic inserts, for example made of carbon fiber-reinforced plastic, or by means of or metal inserts.
  • knobbed films or plates made of thermoplastic or thermosetting fiber-reinforced plastics can also be used. These can be processed in film-like roll form or as stable plate pieces by connecting knobs to knobs in the manner described. If no welding can be carried out for the connection, the knobs can also be non-positively connected to one another by gluing.
  • FIG. 6 shows a shell element made of two knobbed foils connected to one another in accordance with FIG. 2 and welded to one another in a curved manner. It is a particular advantage of these composite elements that they can be bent easily, at least when they are made from sheet-like, thermoplastic dimpled sheets. To connect them together, the dimpled sheets are stretched to a suitable shape and then pressed together and welded or glued in this position. The easiest way to weld is by interposing a metal grid for thermoelectric welding. After welding or gluing, the preformed shape is retained and even has a very high stability.
  • Such lightweight composite elements are extremely diverse.
  • such composite elements can be used, for example, as sprouting heat due to their high flexural rigidity Digging work can be used or as formwork panels for concrete.
  • Such baffles are then many times lighter than previously used steel billets.
  • they are particularly suitable as curved sprout elements or formwork elements as well as load-bearing surface drainages. Due to their good sound insulation properties, they can be used as partitions and insulating walls for all kinds of purposes. Basically, they can be used as load-bearing floor slabs, both exposed and laid in a foundation. Use as roof elements is also possible. Thanks to their light weight and high stability, they are suitable as an excellent building material in vehicle construction.
  • floors and walls of truck bodies, truck trailers or motorhomes and caravans can be built from lightweight composite elements of the type described. All kinds of transport containers and containers can also be produced with it. Furthermore, they can be used as rigid and load-bearing cores for all kinds of sandwiches, for example if the cover plates are to be made of alternative materials, for example metal, wood or stone, etc., they are excellently suited as composite element cores. Self-supporting seals and intermediate storage in walls, roofs and floors with cavities are also conceivable, which are subsequently foamed by means of injections for further sealing. Outdoors, they can be used as temporary floor slabs for securing paths and squares, for example if there are weak floors that are to be heavily used. Emergency slopes, emergency roads, emergency routes and places can be created with it. It can even be used to build floating bridges or floating and load-bearing floors on marshy ground.
  • FIG 7 the continuous production of flat lightweight composite elements from at least two plastic knobbed films is shown schematically. From two rolls, on each of which a whole web of dimpled foil is wound, these dimpled foils are unrolled and fed to an automatic welding machine.
  • the driven rollers 11, 12, which extend over the web width, are rubber-coated and ensure the forward movement of the two webs, while the steel roller 13 has radially projecting steel pins 14.
  • These steel pins 14 are on an electric when the steel roller 13 rotates Heater 15 passed. Their circumference on the steel roller 13 is such that they reach into the interior of adjacent and successive knobs below. They melt through the studded bottoms and also the studded bottoms of the opposite studs of the lower studded sheet. This results in a welding of the two dimpled sheets.
  • the roller 16 generates the necessary back pressure at the welding point.
  • two rollers can also be provided, each having heatable bolts similar to needles or pins 14. However, these bolts are not intended to pierce the studded bottoms. Rather, the two rollers are then arranged in such a way that the bolt ends, when they engage in the nub holes from both sides, only approach a distance which is somewhat less than twice the nub base thickness. In this way, spot welding is achieved. All knobbed floors are therefore welded on their outer side to the knobbed bottom opposite each other without the knobbed bottoms being perforated.
  • Another variant for the continuous production of the lightweight composite elements is to let a metallic grid run in between the two dimpled sheets.
  • This grid then protrudes on both sides of the dimpled sheets lying between them.
  • an electrical voltage can be applied to the grid by means of sliding contacts, so that due to electrical resistance heat it is heated to such an extent that the adjacent knob ends begin to melt.
  • Continuous electrical thermal welding is achieved with a pressure generated simultaneously by pressure rollers.
  • metallic grids carbon-fiber-reinforced plastic mesh grids can be used which have such an electrical conductivity that they can be heated sufficiently for a thermoelectric welding. If the "endless" composite elements produced in this way are still to be provided with cover plates, these can be welded or glued on. For the welding, metallic mesh or carbon-fiber reinforced plastic mesh can be applied in the same way, which over a certain distance in the same way be heated electrically.
  • cover plates to be welded on are then placed on the web by a robot and the entire assembly runs between counter-pressure rollers.
  • the same procedure can of course also be carried out from below, so that cover plates are also placed on the underside of the welded composite element web.
  • the web is stiff and can hardly be bent. It is then continuously cut into panels of any length, which has to be done with a rotating saw.

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  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Architecture (AREA)
  • Textile Engineering (AREA)
  • Civil Engineering (AREA)
  • Structural Engineering (AREA)
  • Laminated Bodies (AREA)

Abstract

L'invention concerne un élément composite léger composé d'au moins deux feuilles à boutons ou de plaques à boutons (2, 3) en plastique, c.-à-d. de feuilles ou de plaques en plastique sur lesquelles des boutons (4, 5) sont formés sur au moins un côté. Lesdites feuilles ou plaques à boutons (2, 3) sont dirigées les unes vers les autres sur les côtés présentant les boutons (4, 5) et soudées ou collées fixement les unes aux autres. Le procédé de fabrication de l'élément composite selon l'invention fait intervenir au moins deux feuilles ou plaques à boutons en plastique. Selon ledit procédé, les feuilles ou plaques sont guidées le long d'un automate à partir de rouleaux (9, 10) ou de piles, et ledit automate soude ou colle lesdites feuilles ou plaques les unes aux autres lors de leur passage, de manière à créer en continu une plaque d'élément composite léger quasiment continue pouvant alors être séparée en sections de longueur quelconque.
PCT/CH2002/000276 2001-06-05 2002-05-23 Element composite leger, procede de fabrication et utilisation Ceased WO2002099218A1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
CH01019/01A CH695701A5 (de) 2001-06-05 2001-06-05 Leichtbau-Verbundelement, sein Herstellungsverfahren und seine Verwendung.
CH1019/01 2001-06-05

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WO2002099218A1 true WO2002099218A1 (fr) 2002-12-12

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WO2005053946A3 (fr) * 2003-12-03 2005-12-01 Iain Norman Bridge Structure de panneau
WO2006069707A1 (fr) * 2004-12-23 2006-07-06 Fraunhofer-Gesellschaft zur Förderung der angewandten Forschung e.V. Element de construction, notamment pour revetement mural, et son procede de production
DE102008007516A1 (de) * 2008-02-05 2009-08-06 Genima Innovations Marketing Gmbh Kernstruktur für den Aufbau mehrlagiger Platten oder Schalen
EP2799211A4 (fr) * 2011-12-27 2015-07-22 Teijin Ltd Procédé d'assemblage de matériaux composites
GB2530237A (en) * 2014-06-04 2016-03-23 Tristan Guy Melland Structural element
EP3020309A1 (fr) * 2010-12-10 2016-05-18 Skydex Technologies, Inc. Calage cellulaire interdigité
WO2018166968A1 (fr) * 2017-03-15 2018-09-20 Agripak S.R.L. Procédé et appareil destinés à traiter une feuille ou des feuilles de matériau thermoplastique ayant une section transversale présentant un profil creux
USD1069315S1 (en) 2021-04-23 2025-04-01 Gridesic Holdings Limited Pallet

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EP4261360B1 (fr) * 2022-04-11 2025-01-22 Johann Egger Composant léger

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Cited By (16)

* Cited by examiner, † Cited by third party
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WO2005053946A3 (fr) * 2003-12-03 2005-12-01 Iain Norman Bridge Structure de panneau
EA009155B1 (ru) * 2003-12-03 2007-10-26 Видабльюэм Текнолоджи Ллк Конструкция панели
WO2006069707A1 (fr) * 2004-12-23 2006-07-06 Fraunhofer-Gesellschaft zur Förderung der angewandten Forschung e.V. Element de construction, notamment pour revetement mural, et son procede de production
US8402715B2 (en) 2004-12-23 2013-03-26 Fraunhofer-Gesellschaft Zur Forderung Der Angewandten Forschung E.V. Building panel in particular for wall covering and method for the production thereof
DE102008007516A1 (de) * 2008-02-05 2009-08-06 Genima Innovations Marketing Gmbh Kernstruktur für den Aufbau mehrlagiger Platten oder Schalen
US9603407B2 (en) 2010-12-10 2017-03-28 Skydex Technologies, Inc. Interdigitated cellular cushioning
EP3020309A1 (fr) * 2010-12-10 2016-05-18 Skydex Technologies, Inc. Calage cellulaire interdigité
US10197125B2 (en) 2010-12-10 2019-02-05 Skydex Technologies, Inc. Interdigitated cellular cushioning
EP2799211A4 (fr) * 2011-12-27 2015-07-22 Teijin Ltd Procédé d'assemblage de matériaux composites
GB2530237A (en) * 2014-06-04 2016-03-23 Tristan Guy Melland Structural element
US10427834B2 (en) 2014-06-04 2019-10-01 Gridesic Holdings Limited Structural element
GB2530237B (en) * 2014-06-04 2021-09-22 Gridesic Holdings Ltd Structural element
US11312533B2 (en) 2014-06-04 2022-04-26 Gridesic Holdings Limited Structural element
US12312124B2 (en) 2014-06-04 2025-05-27 Gridesic Holdings Limited Structural element
WO2018166968A1 (fr) * 2017-03-15 2018-09-20 Agripak S.R.L. Procédé et appareil destinés à traiter une feuille ou des feuilles de matériau thermoplastique ayant une section transversale présentant un profil creux
USD1069315S1 (en) 2021-04-23 2025-04-01 Gridesic Holdings Limited Pallet

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