DE2162174A1 - Laminated panels - with surface layers of plastic made by moulding additional flow channels in core - Google Patents

Laminated panels - with surface layers of plastic made by moulding additional flow channels in core

Info

Publication number
DE2162174A1
DE2162174A1 DE19712162174 DE2162174A DE2162174A1 DE 2162174 A1 DE2162174 A1 DE 2162174A1 DE 19712162174 DE19712162174 DE 19712162174 DE 2162174 A DE2162174 A DE 2162174A DE 2162174 A1 DE2162174 A1 DE 2162174A1
Authority
DE
Germany
Prior art keywords
flow channels
core
surface layers
additional flow
plastic made
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.)
Pending
Application number
DE19712162174
Other languages
German (de)
Inventor
Willy Muehlau
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
Priority to DE19712162174 priority Critical patent/DE2162174A1/en
Publication of DE2162174A1 publication Critical patent/DE2162174A1/en
Pending legal-status Critical Current

Links

Classifications

    • BPERFORMING OPERATIONS; TRANSPORTING
    • B29WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29DPRODUCING PARTICULAR ARTICLES FROM PLASTICS OR FROM SUBSTANCES IN A PLASTIC STATE
    • B29D99/00Subject matter not provided for in other groups of this subclass
    • B29D99/001Producing wall or panel-like structures, e.g. for hulls, fuselages, or buildings
    • B29D99/0021Producing wall or panel-like structures, e.g. for hulls, fuselages, or buildings provided with plain or filled structures, e.g. cores, placed between two or more plates or sheets, e.g. in a matrix
    • BPERFORMING OPERATIONS; TRANSPORTING
    • B29WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29CSHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • B29C70/00Shaping composites, i.e. plastics material comprising reinforcements, fillers or preformed parts, e.g. inserts
    • B29C70/04Shaping composites, i.e. plastics material comprising reinforcements, fillers or preformed parts, e.g. inserts comprising reinforcements only, e.g. self-reinforcing plastics
    • B29C70/28Shaping operations therefor
    • B29C70/40Shaping or impregnating by compression not applied
    • B29C70/42Shaping or impregnating by compression not applied for producing articles of definite length, i.e. discrete articles
    • B29C70/46Shaping or impregnating by compression not applied for producing articles of definite length, i.e. discrete articles using matched moulds, e.g. for deforming sheet moulding compounds [SMC] or prepregs
    • B29C70/48Shaping or impregnating by compression not applied for producing articles of definite length, i.e. discrete articles using matched moulds, e.g. for deforming sheet moulding compounds [SMC] or prepregs and impregnating the reinforcements in the closed mould, e.g. resin transfer moulding [RTM], e.g. by vacuum
    • BPERFORMING OPERATIONS; TRANSPORTING
    • B29WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29CSHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • B29C70/00Shaping composites, i.e. plastics material comprising reinforcements, fillers or preformed parts, e.g. inserts
    • B29C70/04Shaping composites, i.e. plastics material comprising reinforcements, fillers or preformed parts, e.g. inserts comprising reinforcements only, e.g. self-reinforcing plastics
    • B29C70/28Shaping operations therefor
    • B29C70/54Component parts, details or accessories; Auxiliary operations, e.g. feeding or storage of prepregs or SMC after impregnation or during ageing
    • B29C70/546Measures for feeding or distributing the matrix material in the reinforcing structure
    • B29C70/547Measures for feeding or distributing the matrix material in the reinforcing structure using channels or porous distribution layers incorporated in or associated with the product

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Chemical & Material Sciences (AREA)
  • Composite Materials (AREA)
  • Architecture (AREA)
  • Civil Engineering (AREA)
  • Structural Engineering (AREA)
  • Laminated Bodies (AREA)

Abstract

The core material is provided with flow channels on one side to form one surface layer. Pref. the core material is provided with flow channels on both sides to produce two surface layers.

Description

3 e s c h r e i b u n g des "Verfahrens zur Herstellung von Verbundelementen mit Deckschichten aus härtbaren Kunststoffen durch Anbringung zusätzlicher Fliesakanälen mit 4 Patentansprüchen.3 e s c h r e i b u n g of the "Process for the production of composite elements with cover layers made of hardenable plastics by attaching additional tile channels with 4 claims.

Zweck der Erfindung ist es, ebene oder verformte Verbundelemente rationell herzustellen.The purpose of the invention is to rationalize flat or deformed composite elements to manufacture.

Derartige Elemente werden zur Zeit nach folgenden Verfahren hergestellt: 1) Nassbeschichtungsverfahren, bei welchem die Herstellung der Deckschichten gleichzeitig die Verklebung mit den Kernlagen bewirkt.Such elements are currently manufactured using the following processes: 1) Wet coating process, in which the production of the top layers at the same time causes the adhesion to the core layers.

Dieses Verfahren ist unterteilt in: 1 a) Verwendung geschnittener und/oder gewebter Glasfasern mit flüssigen, härtbaren Kunststoffen. So erfolgt die Aushärtung bei Raumtemperatur oder durch Zuführung von Wärme.This procedure is divided into: 1 a) Using cut and / or woven glass fibers with liquid, hardenable plastics. This is how the Curing at room temperature or by applying heat.

1 b) Verwendung von Glasfasern, welche mit härtbaren Kunst stoffen vorimprägniert sind. Die Aushärtung erfolgt durch Zuführung von Wärme.1 b) Use of glass fibers, which materials with curable plastic are pre-impregnated. The hardening takes place through the application of heat.

2) Klebverfahren, wobei die Deckschichten vorfabriziert werden und zu einem späteren Zeitpunkt mit den Kernlagen verklebt werden.2) Bonding process, whereby the cover layers are prefabricated and to be glued to the core layers at a later point in time.

38 Scbäumverfahren, wobei die vorfabrizierten Deckschichten durch das AuSbringen flüssiger Schaumsysteme durch die Aushärtung derselben miteinander verbunden werden.38 foaming process, whereby the prefabricated cover layers through the application of liquid foam systems by curing them together get connected.

4) Handauflegeverfahren, bei welchem die Kernlagen manuell mit verstärkten, härtbaren Kunststoffen beschichtet werden.4) Hand lay-up process, in which the core layers are manually reinforced with hardenable plastics are coated.

5) lnjektionsverfahren, wobei die Kernlage mit dem trockenen Verstärkungsmaterial ummantelt st. Nachdem diese Kernlage in eine mehrteilige, allseits geschlossene Form eingebracht ist, wird der flüssige, härtbare Kunststoff durch eine oder mehrere Düsen unter Druck in die Form injiziert.5) Injection process, with the core layer with the dry reinforcement material encased st. After this core situation in a multi-part, closed on all sides Form is introduced, the liquid, curable plastic is through one or more Nozzles injected into the mold under pressure.

6) Vakuum-Injektionsverfahren, unterscheidet sich von Nr. 5 dadurch, dass an der--oberen Formseite Vakuum angelegt wird und die Injektion an der unteren Seite erfolgt - Bild 1 -Bei vorgenannter Erfindung wird im Prinzip von dem unter 6) genannten Verfahren ausgegangen.6) Vacuum injection method, differs from No. 5 in that that vacuum is applied to the upper side of the mold and the injection to the lower Page takes place - Figure 1 - In the above-mentioned invention is in principle of the below 6) was assumed.

Der wesentliche Unterschied, welcher den wirtschaftlichen Vorteil der Erfindung deutlich macht liegt darin, dass bei dem unter 6) genannten Verfahren die Tränkungsgeschwindigkeit mit zunehmender Tränkungshdhe abnimmt. Dies ist darauf zuückzuführen, dass das Verstärkungsmaterial (z.B. Glasfasermatten) dem relativ hochviskosen, härtbaren Kunststoff Reibungswiederstand entgegensetzt. So beträgt die Tränkungszeit für eine cB.The main difference, which is the economic advantage the invention makes it clear that in the method mentioned under 6) the impregnation speed decreases with increasing impregnation height. This is upon it attributable to the fact that the reinforcement material (e.g. glass fiber mats) is relative to the highly viscous, hardenable plastic opposes frictional resistance. So amounts the soaking time for a cB.

1 mm starke Beschichtung bei Verwendung einer 450 gr/m2 schweren handelsüblichen Glasfasermatte und einem Tränkweg von 2200 mm bei einer Viskosität des-verwendeten, ungesättigten Polyesterharzes von 800 cP/200C, 34 Minuten.1 mm thick coating when using a 450 g / m2 commercially available Glass fiber mat and an impregnation path of 2200 mm with a viscosity of the used, unsaturated polyester resin of 800 cP / 200C, 34 minutes.

Als Kornmaterial war Sperrholz von 19,mm Stärke eingesetzt Gegenüber diesem Verfahren hat die Erfindung den Vorteil, dass durch die Anbringung von Fliesskanälen in das Kernmaterial parallel zur Fliessrichtung die Tränkúngszeit wesentlich reduziert wird, - Bild 2 - . So wird die Tränkungszeit bei gleichen Bedingungen auf 8 Minuten reduziert, wenn Fliesskanäle von 1,5 x 1,5 mm im Abstand von 80 mm angebracht werden. Da die Härtungszeit z.-B-. bei ungesättigten Polyesterharzen bei Raumtemperatur doppelt so lange ist wie die Verarbeitungszeit, ergibt sich aus vorgenannten Beispielen folgender Zeitaufwand: 1. Ohne Fliesskanäle: Ver'arbeitungszeit: 34 Minuten Härtungszeit: 70 Minuten Entformzeit (EZ>: 104 Minuten 2. Mit Fliesskanälen: Verarbeitungszeit: 8 Minuten Härtungszeit: 16 Minuten Entformzeit (EZ): 24 Minuten Diese Werte haben nur Gültigkeit bei vorgenannter Anordnung, da die freiwerdende Exothermwärme bei Sperrholz als Kernmaterial und einer Beschichtungsstärke von ca. 1 mm abgeleitet wird und djas,ha,lb die Härtungszeit kaum positiv beeinflusst wird. Durch veränderte Schichtstärken und Kernmaterialien mit anderen Wärmeleitzahlen ändern sich auch die Entformzeiten.Plywood with a thickness of 19 mm was used as the grain material The invention has the advantage of this method that by attaching of flow channels in the core material parallel to the direction of flow is the soaking time is significantly reduced - Fig. 2 -. So the soaking time will be under the same conditions Reduced to 8 minutes if flow channels of 1.5 x 1.5 mm at a distance of 80 mm be attached. Since the hardening time e.g. with unsaturated polyester resins is twice as long as the processing time at room temperature, results from The above-mentioned examples take the following time: 1. Without flow channels: Processing time: 34 minutes curing time: 70 minutes demoulding time (EZ>: 104 minutes 2. With flow channels: Processing time: 8 minutes. Curing time: 16 minutes. Demoulding time (EZ): 24 minutes These values are only valid with the aforementioned arrangement, since the one that is released Exothermic heat with plywood as the core material and a coating thickness of approx. 1 mm is derived and djas, ha, lb the curing time is hardly influenced positively. Due to changed layer thicknesses and core materials with different thermal conductivity values the demolding times also change.

Da vorgenanntes- Beispiel für das Rauptverwendungsgebiet wie Containerwände und dächer, utzfahrzeugaufbauten sowie grossformatige Schalungselemente typisc' ist, mäss auch die in' dem Beispiel angeführte Entformzeit miteinander verglichen werden: Entformzeit 1. : Entformzeit 2. = = 104 2 24 Minuten Der Vorteil der Erfindung ist also darin zu sehen, dass bei der gleichen Anzahl von Vorrichtungen und Formen die vielfache Kapazität möglich ist.The aforementioned example for the main area of use such as container walls and roofs, commercial vehicle superstructures and large-format formwork elements typically is, the demolding times given in the example must also be compared with one another will: Demolding time 1.: Demolding time 2. = = 104 2 24 minutes Der The advantage of the invention is therefore to be seen in the fact that with the same number of Devices and forms the multiple capacity is possible.

Da die Anbringung der Fliesskanäle bei Verwendung einer sogenannten "Vielblatt-Kreissäge" nicht aufwendig ist, die Verbin dung zwischen Kernmaterial und Deokschichten durch die mechanische Verankerung Jedoch wesentlich verbessert wird, ergibt sich auch hierdurch ein zusätzlicher Vorteil für die Errindung.Since the attachment of the flow channels when using a so-called "Multi-blade circular saw" is not expensive, the connec tion between the core material and de-icing layers due to the mechanical anchoring, however, significantly improved This also results in an additional advantage for the invention.

Claims (1)

A n- n r u c h für A n n r u c h for Verfahren zur Herstellung von Verbundelementen mit Deckschichten aus härtbaren Kunststoffen durch Anbringung zusätzlicher Fliesskanale" Gegenüber den herkömmlichen Methoden, Kernmaterialien mit Deckschichten aus härtbaren Kunststoffen zu beschichten, wird dieses Verfahren d a d u r c h g e k e n n z e i c h n e t, dass 1.) Ein Kernmaterial zur einseitigen Beschichtung auf einer Seite mit Fliesskanälen versehen wird - Bild 3 -2.) Ein Kernmaterial zur beidseitigen Beschichtung auf beiden Seiten mit Fliesskanälen versehen wird - Bild 4 3.) Mehrere Kernmaterialien zur Verklebung miteinander und zur gleichzeitigen Beschichtung mit härtbaren Kunststoffen auf einer - Bild 5 - oder beiden Seiten - Bild 6- -mit Fliesskanälen versehen werden. Process for the production of composite elements with cover layers made of hardenable plastics by adding additional flow channels "opposite conventional methods, core materials with outer layers of hardenable plastics to coat, this process is d u r g e k e n n n z e i c h n e t, that 1.) A core material for one-sided coating on one side with flow channels is provided - picture 3-2.) A core material for double-sided coating on both Sides is provided with flow channels - picture 4 3.) Several core materials for Bonding with each other and for simultaneous coating with curable plastics on one - Fig. 5 - or both sides - Fig. 6- - be provided with flow channels. 4. ) Zur Verbindung kleinformatiger Kernmaterialien zu Grossformaten die Schäftfuge mit Fliesskanälen versehen wird - Bild 7 - L e e rs ei t e 4.) To connect small-format core materials to large formats the butt joint is provided with flow channels - Fig. 7 - L e e rs ei t e
DE19712162174 1971-12-15 1971-12-15 Laminated panels - with surface layers of plastic made by moulding additional flow channels in core Pending DE2162174A1 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
DE19712162174 DE2162174A1 (en) 1971-12-15 1971-12-15 Laminated panels - with surface layers of plastic made by moulding additional flow channels in core

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
DE19712162174 DE2162174A1 (en) 1971-12-15 1971-12-15 Laminated panels - with surface layers of plastic made by moulding additional flow channels in core

Publications (1)

Publication Number Publication Date
DE2162174A1 true DE2162174A1 (en) 1973-06-28

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Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0343736A2 (en) * 1988-05-23 1989-11-29 Shell Internationale Researchmaatschappij B.V. Process for reducing mould cycle time
EP0348831A2 (en) * 1988-06-29 1990-01-03 Weigel, Angela Method and apparatus for producing moulded parts from curable plastic material
EP0517416A1 (en) * 1991-06-01 1992-12-09 British Aerospace Public Limited Company Resin flow in the manufacture of fibre reinforced composite structures
EP0909845A1 (en) * 1997-08-04 1999-04-21 Toray Industries, Inc. A woven carbon fiber fabric, a fiber reinforced plastic molding obtained by using the woven fabric, and a production method of the molding

Cited By (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0343736A2 (en) * 1988-05-23 1989-11-29 Shell Internationale Researchmaatschappij B.V. Process for reducing mould cycle time
EP0343736A3 (en) * 1988-05-23 1991-10-09 Shell Internationale Researchmaatschappij B.V. Process for reducing mould cycle time
EP0348831A2 (en) * 1988-06-29 1990-01-03 Weigel, Angela Method and apparatus for producing moulded parts from curable plastic material
EP0348831A3 (en) * 1988-06-29 1991-07-24 Weigel, Angela Method and apparatus for producing moulded parts from curable plastic material
EP0517416A1 (en) * 1991-06-01 1992-12-09 British Aerospace Public Limited Company Resin flow in the manufacture of fibre reinforced composite structures
EP0909845A1 (en) * 1997-08-04 1999-04-21 Toray Industries, Inc. A woven carbon fiber fabric, a fiber reinforced plastic molding obtained by using the woven fabric, and a production method of the molding

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