EP0603640A2 - Panneau de coffrage - Google Patents

Panneau de coffrage Download PDF

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Publication number
EP0603640A2
EP0603640A2 EP93119742A EP93119742A EP0603640A2 EP 0603640 A2 EP0603640 A2 EP 0603640A2 EP 93119742 A EP93119742 A EP 93119742A EP 93119742 A EP93119742 A EP 93119742A EP 0603640 A2 EP0603640 A2 EP 0603640A2
Authority
EP
European Patent Office
Prior art keywords
formwork
formwork panel
sheet according
plastic
panel according
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.)
Granted
Application number
EP93119742A
Other languages
German (de)
English (en)
Other versions
EP0603640B1 (fr
EP0603640A3 (en
Inventor
Gerhard Dingler
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.)
Individual
Original Assignee
Individual
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 Individual filed Critical Individual
Publication of EP0603640A2 publication Critical patent/EP0603640A2/fr
Publication of EP0603640A3 publication Critical patent/EP0603640A3/de
Application granted granted Critical
Publication of EP0603640B1 publication Critical patent/EP0603640B1/fr
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

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Classifications

    • E—FIXED CONSTRUCTIONS
    • E04—BUILDING
    • E04G—SCAFFOLDING; FORMS; SHUTTERING; BUILDING IMPLEMENTS OR AIDS, OR THEIR USE; HANDLING BUILDING MATERIALS ON THE SITE; REPAIRING, BREAKING-UP OR OTHER WORK ON EXISTING BUILDINGS
    • E04G9/00—Forming or shuttering elements for general use
    • E04G9/10—Forming or shuttering elements for general use with additional peculiarities such as surface shaping, insulating or heating, permeability to water or air
    • E—FIXED CONSTRUCTIONS
    • E04—BUILDING
    • E04G—SCAFFOLDING; FORMS; SHUTTERING; BUILDING IMPLEMENTS OR AIDS, OR THEIR USE; HANDLING BUILDING MATERIALS ON THE SITE; REPAIRING, BREAKING-UP OR OTHER WORK ON EXISTING BUILDINGS
    • E04G9/00—Forming or shuttering elements for general use
    • E04G9/02—Forming boards or similar elements
    • E04G9/05—Forming boards or similar elements the form surface being of plastics

Definitions

  • the invention relates to a formwork sheet according to the preamble of the main claim.
  • DE-OS 40 20 124 pointed out the importance of the thermal conductivity for formwork panels made of plastic. If the setting concrete is not cooled, it can heat up to 60 ° C. This is not good for the concrete itself, and above all the plastic formwork panels lose their strength at normal temperature. Even today, some still try to avoid this difficulty by only concreting in winter.
  • the object of the invention is to achieve at least the necessary thermal conductivity values, if not higher, in a cheaper manner. It should also be possible to make non-recyclable materials from other origins usable. One would like to be able to use known methods for the production. It is to be avoided that the metal bodies have to be pretreated, as is the case, for example, with chips which always have to be cleaned almost chemically and which also always require an adhesive bridge.
  • the invention enables prototypes to achieve elasticity modules in the range from 2,000 to 3,000 N / mm2.
  • the bending test shows that the cross-section of the formwork panel is homogeneous.
  • Such a formwork sheet can also be broken in a bending test.
  • the confused fracture patterns that are typical of wood-glued formwork panels are missing. This is because, within such formwork panels, shear forces occur on the individual surfaces inside the formwork panel that are lacking in the formwork panels according to the invention. Particularly in wet environments, the comparison is clearly in favor of the formwork panel according to the invention.
  • the starting material for the formwork sheet according to the invention is optimal, since there is no particular need to create adhesive bridges. There is no need to clean the material. The effort for processing is minimal. The screw extruders are not abraded. In contrast to the band-shaped material, the feed to the extruder does not cause any rheological difficulties.
  • the formwork panels themselves are recyclable.
  • the invention is also excellently suitable for a component according to DE-OS 40 36 151 (Dingler), in which the thermal conductivity is a problem in so far as this component is foamed in its central region and the thermal conductivity of the entire component is dependent of the layer area that has the worst thermal conductivity, which area lies here in the center plane of the component.
  • FIG 1 shows chips of aluminum foil, which chips were made as follows: PE films coated with PE were wound on wide rolls that can weigh up to 2 tons. The PE was printed with white ink. Such roles can be discarded for quality reasons. They form a committee. They represent about 20% of the waste of an aluminum plant. From these ordered layers of rolls one cuts off discs with a kind of guoillotine and throws them into the funnels of machines, such as from the Herbold "Cutting Mills” or from the company Condux “Cutting Granulators” to be named. They are also known as “heavy knife mills". There are different arrangements of stator blades and rotor blades for these.
  • these chips can be used directly. They combine excellently with the plastic from which the formwork panel is made, essentially entirely or predominantly in the extruder.
  • the plastic layer melts. Most of these foils have an adhesion promoter between the aluminum and the PE.
  • the aluminum can be up to 4/10 mm thick.
  • the waste is not sorted in rolls. Rather, the films are sometimes pressed into bales, as is the case with the film waste. In this case, the film layers are tangled and pressed. Such bales, like the rolls, are very heavy. Even these bales are not thrown into the heavy knife mills as a whole. Rather, you also cut slices with a kind of guoillotine and then throw these slices into the filling funnels of the heavy knife mills. Here too, the clippings swirl around in the mill until they fall through the sieve. This gives flat, granular particles according to Figure 2, which were processed in the same heavy knife mill as the film chips from Figure 1. The only difference is that the feed material was fed in a different form. Waste was used here that consisted of aluminum foil that was laminated with an unprinted PE layer that was not printed. Therefore, you can see nothing of the existing, but crystal-clear PE in Figures 1 and 2.
  • the particles have a silvery sheen and are statistically of a size that can be measured using graph paper (the side length of the smallest diamond is 1 mm). As you can see, the chips are practically all folded back one or more times and glued in this state through the PE layer, which can be done by cold welding or hot welding during the grinding process.
  • the particles according to Figure 2 could also be called granules, nuggets or the like. They have flat shapes and are in the range from 2/10 to 7/10 mm thick, i.e. much flatter than their characteristic surface dimensions are shown in Figure 2. These particles have been passed through a sieve with an 8 mm mesh size. A mesh size of 10 - 12 mm should still be tolerable. In this respect, a mesh size that is too small leads to flour, which would lead to a large reject of unusable particles and is not desirable.
  • Such a plate / nugget / granule is also shown on graph paper in Figure 3. You can see the very irregular and therefore cheap surface. You can also see a black dividing line going from bottom to top right as the edge line of a fold at the bottom left. The particles give the impression that they have been forged.
  • non-laminated aluminum foil can also be used.
  • aluminum lids can also be used, such as those used as screw caps for bottles, vials or the like, irrespective of whether they are coated with plastic or not.
  • polyethylene is alloyed with polyamide to increase heat resistance. 20% polyamide ⁇ 30% is used in the entire formulation.
  • a preferred alloy for the formwork sheet used 20% PA, 50% HDPE, 15% glass fiber and 15% aluminum flakes. These values can each be changed within a range of 20%, whereby it must of course be ensured that 100% ultimately result.

Landscapes

  • Engineering & Computer Science (AREA)
  • Architecture (AREA)
  • Mechanical Engineering (AREA)
  • Civil Engineering (AREA)
  • Structural Engineering (AREA)
  • Laminated Bodies (AREA)
  • Forms Removed On Construction Sites Or Auxiliary Members Thereof (AREA)
  • Processing And Handling Of Plastics And Other Materials For Molding In General (AREA)
  • Diaphragms For Electromechanical Transducers (AREA)
  • Disintegrating Or Milling (AREA)
EP93119742A 1992-12-18 1993-12-08 Panneau de coffrage Expired - Lifetime EP0603640B1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE4242922A DE4242922A1 (de) 1992-12-18 1992-12-18 Schalplatte
DE4242922 1992-12-18

Publications (3)

Publication Number Publication Date
EP0603640A2 true EP0603640A2 (fr) 1994-06-29
EP0603640A3 EP0603640A3 (en) 1994-08-24
EP0603640B1 EP0603640B1 (fr) 1996-08-14

Family

ID=6475734

Family Applications (1)

Application Number Title Priority Date Filing Date
EP93119742A Expired - Lifetime EP0603640B1 (fr) 1992-12-18 1993-12-08 Panneau de coffrage

Country Status (6)

Country Link
EP (1) EP0603640B1 (fr)
AT (1) ATE141373T1 (fr)
CZ (1) CZ287854B6 (fr)
DE (2) DE4242922A1 (fr)
ES (1) ES2091541T3 (fr)
SK (2) SK144793A3 (fr)

Family Cites Families (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE3916938A1 (de) * 1989-05-24 1990-11-29 Gerhard Dingler Bauelement

Also Published As

Publication number Publication date
EP0603640B1 (fr) 1996-08-14
DE59303437D1 (de) 1996-09-19
SK2034U (sk) 1998-12-02
CZ287854B6 (en) 2001-02-14
DE4242922A1 (de) 1994-06-23
CZ273393A3 (en) 1994-07-13
SK144793A3 (en) 1994-11-09
ES2091541T3 (es) 1996-11-01
EP0603640A3 (en) 1994-08-24
ATE141373T1 (de) 1996-08-15

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