DE305697C

DE305697C -

Info

Publication number: DE305697C
Application number: DENDAT305697D
Authority: DE

Description

AUSGEGEBEN AM 4. AUGUST 1919ISSUED ON AUGUST 4, 1919

KLASSE 55 b GRUPPECLASS 55 b GROUP

Pappen, und zwar hauptsächlich die auf Karton- oder Zylindermaschinen hergestellten Maschineniederpappen, werden von den Verbrauchern in noch höherer Stärke, als sie gegenwärtig im Handel sind, also spezifisch leichter, als sie bis jetzt aus reinem Holzschliff oder Papierabfällen hergestellt werden können-, verlangt, so daß nach einem Rohstoff gesucht wird, der diesen Zweck erfüllt, der aber dabeiCardboard, mainly those made on cardboard or cylinder machines Machine-made cardboard is used by consumers in an even higher strength than it is at present are on the market, so specifically lighter than they are made from pure wood pulp or Waste paper can be produced- demanded, so that looked for a raw material who fulfills this purpose, but who thereby

ίο nicht teurer sein darf als das Schleifholz. Dieser Rohstoff ist nun in der Baumrinde des Schleifholzes selbst gefunden worden. Bekanntlich ist die Rinde spezifisch leichter als das Holz selbst und, da man bisher die Baumrinde vom Schleifholz abschälte und mangels einer anderen Verwendbarkeit in der Regel als Kesselfeuerung verbrannte, so hat man in der Baumrinde nicht nur ein billiges, sondern auch das geeignetste Aus gangsprodukt zur Erreichung des hier gesteckten Zieles.ίο must not be more expensive than the grinding wood. This raw material has now been found in the tree bark of the grinding wood itself. As is well known the bark is specifically lighter than the wood itself and, since one has hitherto been the tree bark peeled off the sanding wood and, in the absence of any other usability, usually as If the boiler is burnt, you not only have a cheap one in the bark, but also a cheap one the most suitable starting product to achieve the goal set here.

Es ist zwar bereits ein Vorschlag bekannt geworden, nach welchem die Baumrinde in der Papierfabrikation Verwendung gefunden hat. Indessen handelt es sich dort um ein chemisches Verfahren zur Erzeugung von Zellstoff, der dann zu Papier verarbeitet wird, während gemäß der Erfindung eine unmittelbare Verarbeitung zu Pappe angestrebt und erreicht wird.It is true that a proposal has already become known, according to which the tree bark in the Paper manufacturing has found use. However, it is a chemical one there Process for the production of pulp, which is then converted into paper while According to the invention, a direct processing into cardboard is sought and achieved will.

Mit der Erkenntnis, die Baumrinde zu verwenden, war indessen die Möglichkeit ihrer unmittelbaren Verarbeitung zu Pappe noch nicht gegeben, da. sich einer derartigen unmittelbaren Verwendung technische Schwierigkeiten in den Weg stellen, woraus wohl auch zu erklären ist, daß man bisher von einer unmittelbaren Verwendung der Rinde Abstand genommen hat. Diese Schwierigkeiten liegen darin, daß sich die Rinde nicht schleifen läßt. Im Schleifverfahren bröckelt die Rinde anstatt ein Gut zu liefern, wie es beim Schleifholz der Fall ist. Um hier zum Ziel zu kommen, wurde erfindungsgemäß dazu übergegangen, die Rinde in einer Art Knochenmühle zu zerkleinern. Bekanntlich ist der Zerkleinerungsvorgang in einer Knochenmühle ein wesentlich anderer als in einer Schleifmaschine, insofern in der Knochenmühle die Zerkleinerungsorgane reibeisenähnlich vorstehende Zacken sind, die auf die Rinde ganz anders einwirken als das Reiborgan einer Schleifmaschine. Ganz entgegen der Erwartung liefert bereits die Knochenmühle ein zerkleinertes Gut, bei dem bereits die Zerkleinerung so weit getriebe^ ist, daß die einzelnen Stücke · von etwa solcher grüßartigen Beschaffenheit* sind wie gemahlener Kaffee. Die aus der Knochenmühle kommende zerkleinerte Rinde wird dann in einen Sortierer gebracht, um hierauf unmittelbar in die Kartonmaschine gegeben zu werden.With the knowledge of using the tree bark, however, there was the possibility of it Immediate processing into cardboard has not yet been given. such an immediate Use technical difficulties in the way, from which it is probably also to be explained that one has so far been from an immediate Use of the bark has declined. These difficulties are that the bark cannot be grinded. In the grinding process, the bark crumbles instead of delivering a good, as is the case with grinding wood Case is. In order to achieve the goal here, the invention went over to the bark to grind in a kind of bone mill. As is well known, the crushing process is in a bone mill is much different from that of a grinding machine, insofar as it is in the Bone mill the grinding organs are grater-like protruding prongs that open up the bark has a completely different effect than the friction element of a grinding machine. Quite contrary The bone mill already delivers a comminuted product to the expectation, in which already the comminution is carried out so far that the individual pieces Texture * are like ground coffee. The crushed bark coming from the bone mill is then put into a sorter brought to be placed directly in the board machine.

Wo es sich als notwendig erweist, kann das aus der Knochenmühle kommende Gut nochmals in einem Holländer weiter zerkleinert werden.Where it proves necessary, the goods coming from the bone mill can be used again to be further crushed in a dutchman.

In jedem Falle erweist sich der Durchgang durch einen Sortierer als notwendig, weil immerhin einige größere Stückchen in dem sonst gleichmäßigen Gut vorhanden sind, die aus-In any case, the passage through a sorter turns out to be necessary because at least there are some larger pieces in the otherwise uniform material, which

Claims

need to be divorced. These can be particularly intercepted and on occasion Dutch fed pastures.

The processing up to the finished cardboard

. 5 now appears in such a way that the shredded bark is considerably thinned with water than Middle layer of cardboard is attached. It can be thought that despite the very extensive After all, crushing the bark

ίο does not deliver the same uniform fiber like the wood pulp. But because the mass obtained from the bark is in the finished Cardboard forms the middle layer, it retains its good appearance in the same way, it can even improve the appearance, through a certain coloring power, the inherent in it, and in particular in cardboard made from paper and cardboard waste has an even tanning effect on the neighboring layers.

According to the above, the method for obtaining a specifically light cardboard consists in that tree bark is crushed in a kind of bone mill, then, if necessary, in a HoI country is further crushed, then passed into a sorter and finally diluted with water is placed in the board machine, expediently in such a way that the layer is the middle layer of the finished paperboard forms.

A number of advantages are achieved through this new process:

Firstly, the cardboard thickness is increased significantly, or cardboard is light at this height created;

secondly, this high or light cardboard is created by utilizing what has been little so far or bark not used at all, which is a fully-fledged raw material with the new process forms, and

thirdly, an advantage is obtained in that the crushed, mixed with water, rind formed into pulp as, coloring agent for out Cardboard formed from paper and cardboard waste is used.

Of course, one would not depart from the scope of the present invention if if you change the grinding process a little. Essential to the invention is the knowledge that the single or multiple shredding of the bark, z. Am a kind of bone mill, at all to achieve a result which enables to be able to use the obtained, shredded material in the manner described. Even that would not move away from the invention; if one were for example due to further crushing the pulp in any desired way Cardboard instead of just using them in the middle layer.

Sponsor τ request:

Method of manufacture specific. light paperboard using tree _x bark, characterized in that the bark is comminuted in a kind of bone mill and, optionally after passing through a Dutch, a sorter is supplied, after which the comminuted material after dilution with water in the board machine as a middle layer in the finished cardboard is processed.