DE3012792A1 - Mouldings reinforced with very short jagged metal fibres - giving same strength as larger quantities of long smooth fibres - Google Patents
Mouldings reinforced with very short jagged metal fibres - giving same strength as larger quantities of long smooth fibresInfo
- Publication number
- DE3012792A1 DE3012792A1 DE19803012792 DE3012792A DE3012792A1 DE 3012792 A1 DE3012792 A1 DE 3012792A1 DE 19803012792 DE19803012792 DE 19803012792 DE 3012792 A DE3012792 A DE 3012792A DE 3012792 A1 DE3012792 A1 DE 3012792A1
- Authority
- DE
- Germany
- Prior art keywords
- fibres
- short
- steel
- fibers
- mouldings
- 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
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
- B29C70/00—Shaping composites, i.e. plastics material comprising reinforcements, fillers or preformed parts, e.g. inserts
- B29C70/04—Shaping composites, i.e. plastics material comprising reinforcements, fillers or preformed parts, e.g. inserts comprising reinforcements only, e.g. self-reinforcing plastics
- B29C70/06—Fibrous reinforcements only
- B29C70/10—Fibrous reinforcements only characterised by the structure of fibrous reinforcements, e.g. hollow fibres
- B29C70/12—Fibrous reinforcements only characterised by the structure of fibrous reinforcements, e.g. hollow fibres using fibres of short length, e.g. in the form of a mat
Abstract
Description
VERFAHREN ZUR ARMIERUNG VON FORNKJ:.RPERMASSENFORNKJ REINFORCEMENT METHOD:
BESCHReIBUNG Gegenstand der Erfindung ist die Anwendung von im spanabhebenden Verfahren hergestellten Fasern aus starrem Werkstoff, vorzugsweise Stahl oder Edelstahl, als Armierung von Formkörpermassen.DESCRIPTION The subject of the invention is the use of in the machining Fibers made from a rigid material, preferably steel or stainless steel, as reinforcement of molding compounds.
Das Armieren von Formkörpermassen mit organischen oder anorganischen Fasern gehört zum Stand der Technik. Um bei auf Druck, Zug und Biegezug beanspruchten Formkörpern zu günstigen Festigkeiten zu gelangen,sollte eine Armierungsfaser um ihre Eigenfestigkeit auszunutzen eine möglichst große Oberfläche haben, so daß ein der Eigenfestigkeit entsprechendes Haftvermögen vorhanden ist. Deshalb wird bisher, wenn das Fertigungsverfahren es erlaubt, eine möglichst lange Faser verwendet.The reinforcement of molding compounds with organic or inorganic Fibers belong to the state of the art. In order to be subjected to compression, tension and flexural tension To get moldings to favorable strengths, a reinforcement fiber should be around to take advantage of their intrinsic strength as large a surface as possible, so that a the adhesive strength is adequate. Therefore so far, If the manufacturing process allows, the longest possible fiber is used.
Dabei sind relativ aufwendige Verfahren notwendig, um die Fasern in die Massen homogen einzuarbeiten und somit eine durchgehend gleichmäßige Festigkeit der Formmasse zu erreichen.Relatively complex processes are necessary to get the fibers in to incorporate the masses homogeneously and thus a consistently uniform strength to achieve the molding compound.
Ziel der Erfindung ist es, eine Fasertype zu verwenden, die gegenüber den bisher benutzten Fasern Vorteile in der erzielbaren Festigkeit und in der Verarbeitung bringt.The aim of the invention is to use a type of fiber that is opposite the previously used fibers advantages in the achievable strength and in the processing brings.
Kurze und mikrokurze dünne spanförmige Fasern werden bislang zur Armierung von Formkörpermassen nicht verwendet. So werden z. B. Metallfasern, soweit sie bereits zur Armierung verwendet werden, bisher aus Metalldrähten oder Metallbändern durch Schneiden oder Stanzen hergestellt und müssen wegen ihrer glatten und scharf umrissenen Oberflächen eine Mindestlänge von 30 mm haben, um ein ihrer Eigenfestigkeit entsprechendes Haftvermögen zu gewährleisten.Up to now, short and micro-short, thin, chip-shaped fibers have been used for reinforcement not used by molding compositions. So z. B. metal fibers, if they already exist used for reinforcement, previously made of metal wires or metal strips Cutting or punching are made and must be because of their smooth and sharply outlined Surfaces have a minimum length of 30 mm in order to achieve their inherent strength To ensure adhesion.
Versuche haben ergeben, daß dünne kurze und mikrokurze Metallfasern, die im spanabhebenden Verfahren gewonnen werden, sich hervorragend für die Bewehrung von Formkörpermassen eignen.und hohe Druck-, Zug- und Biegezug-Festigkeiten bewirken. Dies beruht auf der Tatsache, daß die durch spanabhebendes Verfahren gewonnenen kurzen und mikrokuzen dünnen Metallfasern, wie man unter dem Mikroskop sehen kann, absolut unterschiedliche und unregelmäßige Formen mit scharfen zackigen und stark ausgefransten Begrenzungslinien der jeweiligen Flächen haben.Tests have shown that thin, short and micro-short metal fibers, which are obtained in the machining process are excellent for reinforcement of molding compounds and produce high compressive, tensile and flexural strengths. This is due to the fact that those obtained by machining short and micro-thin metal fibers, as can be seen under the microscope, absolutely different and irregular shapes with sharp jagged and strong have frayed boundary lines of the respective surfaces.
Aufgrund der vorbeschriebenen Form armiert eine solche Faser 1.) mittels der im Verhältnis zum Volumen großen Oberfläche 2.) Zusätzlich verankern sich die Fasern durch die vielen Haken und Widerhaken untereinander.Due to the shape described above, such a fiber reinforces 1.) by means of the large surface area in relation to the volume 2.) In addition, the Fibers through the many hooks and barbs among each other.
3.) Die Rasern verankern sich zusätzlich durch ihre Haken und Widerhaken fest in der sie umgebenden Masse.3.) The razors are also anchored by their hooks and barbs firmly in the mass surrounding them.
Damit erhöht sich der Widerstand gegen jede Art von Beanspruchung erheblich, und die Eigenfestigkeit der Metallfaser wird besser ausgenutzt. Dies bedeutet, daß ca. 0,8 GWT (Gewichtsteile) einer solchen spanförmigen Kurzfaser aus Metall, z. B. Stahl, den gleichen Armierungseffekt haben wie 1,0 GWT einer glatten längeren Faser aus dem gleichen Werkstoff.This increases the resistance to any type of stress considerable, and the inherent strength of the metal fiber is better used. this means that approx. 0.8 GWT (parts by weight) of such a chip-shaped short fiber Metal, e.g. B. steel, have the same reinforcement effect as 1.0 GWT of a smooth longer fiber made from the same material.
Es hat sich weiter gezeigt, daß z. B. 0,33 GF spanförmiger Stahlkurzfasern den gleichen Armierungseffekt haben wie 1,0 GWT einer alkalibeständigen glatten, fadenförmigen Glasfaser von 50 - 60 mm Länge.It has also been shown that, for. B. 0.33 GF chipped steel short fibers have the same reinforcement effect as 1.0 GWT of an alkali-resistant smooth, thread-like glass fiber of 50 - 60 mm length.
Die Versuche haben weiter ergeben, daß spanförmige kurze und mikrokurze Metallfasern (Stahl) sich mit einfachen Zwangsmischern hervorragend in fast jede Art von nicht abgebundener Masse, unabhängig von deren Konsistenz, einarbeiten lassen und sich absolut gleichmäßig und homogen verteilen.The tests have also shown that chip-shaped short and micro-short Metal fibers (steel) can be used with simple compulsory mixers excellently in almost any Allow type of non-set mass, regardless of its consistency, to be incorporated and are distributed absolutely evenly and homogeneously.
Wie die durchgeführten Vergleichsversuche ferner gezeigt haben, verbleibt eine kurze oder mikrokuze spanförmige Metallfaser aufgrund ihrer Verankerung beim Gießen, Pressen oder Stampfen der Masse zwischen den Festkörpern dieser Masse, während sich die flüssigere Komponente der Masse an die Formwände drückt und nach dem Erhärten eine glatte Oberfläche bildet,die die Fasern nach außen abdeckt. Fasern mit glatten und gleichförmigen Oberflachen dagegen drücken sich mit an die Formkörper-Oberfläche und ergeben dadurch eine rauhere Oberfläche, an der man sich unter Umständen verletzen kann. Sie sind ausserdem dadurch äußeren Einflüssen ausgesetzt, was die Oberflächenstabilität negativ beeinflussen kann.As the comparative tests carried out have also shown, there remains a short or mikrokuze chip-shaped metal fiber due to its anchoring at Pouring, pressing or tamping the mass between the solids of this mass while the more liquid component of the mass presses against the mold walls and after hardening forms a smooth surface that covers the fibers from the outside. Fibers with smooth and uniform surfaces, on the other hand, also press against the surface of the molded body and thereby result in a rougher surface on which you may injure yourself can. They are also exposed to external influences, which affects the surface stability can negatively affect.
Claims (1)
Priority Applications (3)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
DE19803012792 DE3012792A1 (en) | 1980-04-02 | 1980-04-02 | Mouldings reinforced with very short jagged metal fibres - giving same strength as larger quantities of long smooth fibres |
DE19803033634 DE3033634A1 (en) | 1980-04-02 | 1980-09-06 | Reinforced cement - contg. small addns. of varying jagged steel particles to provide highly effective uniform reinforcing properties |
DE19803037713 DE3037713A1 (en) | 1980-04-02 | 1980-10-06 | Extrusion or injection mixtures contain microfibres - esp. from steel machining integrally mixed with plastics and fillers |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
DE19803012792 DE3012792A1 (en) | 1980-04-02 | 1980-04-02 | Mouldings reinforced with very short jagged metal fibres - giving same strength as larger quantities of long smooth fibres |
Publications (2)
Publication Number | Publication Date |
---|---|
DE3012792A1 true DE3012792A1 (en) | 1981-10-08 |
DE3012792C2 DE3012792C2 (en) | 1991-11-21 |
Family
ID=6099082
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
DE19803012792 Granted DE3012792A1 (en) | 1980-04-02 | 1980-04-02 | Mouldings reinforced with very short jagged metal fibres - giving same strength as larger quantities of long smooth fibres |
Country Status (1)
Country | Link |
---|---|
DE (1) | DE3012792A1 (en) |
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE3916938A1 (en) * | 1989-05-24 | 1990-11-29 | Gerhard Dingler | COMPONENT |
-
1980
- 1980-04-02 DE DE19803012792 patent/DE3012792A1/en active Granted
Non-Patent Citations (1)
Title |
---|
DE-Z: Kunststoff-Berater, 10/1968, S. 812 * |
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE3916938A1 (en) * | 1989-05-24 | 1990-11-29 | Gerhard Dingler | COMPONENT |
Also Published As
Publication number | Publication date |
---|---|
DE3012792C2 (en) | 1991-11-21 |
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