DE7716045U1 - COUNTER KNIFE FOR CHOPPING MACHINES OR CHIPPING MACHINES FOR WOOD SHREDDING - Google Patents

Description

Fee knife for Haakr or Zanspanungsmasohlnen for wood chopping tion ___,

The invention relates to a counter knife for chopping or chipping machines for wood chopping, on which the rotating chopping or Machiners with a short distance of just a few tenths of a meter.

It is important to have the edge of such a counter knife as a finish of the wood feed chute to the cutting tool always remains sharp and the distance to the cutting circle remains not enlarged.

Replaceable counter knife bars are often used for this purpose which has a counter knife made of high-strength steel screwed onto one edge will.

The object of the invention is to increase the durability of this counter knife to be increased further through the use of hard metal. It was previously believed that counter knives of this type could not be made from hard metal because it is difficult to produce hard metal strips of the required length.

The invention solves the problem by a counter knife for chopping or Zerspanungsmaschlnen, with a retractable and extendable counter knife bar, which is equipped with the actual counter knife outside the machine, whereby the counter knife is jammed Consists of hard metal strips.

These hard metal strips are preferably placed diagonally in the counter knife bar trapped. The two narrow sides of these hard metal strips form a roof-shaped cutting edge with approximately 90 degrees Kellwinkel trained.

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7716845 01.8877

Claims (3)

IfI I 1 I (The figure explains the invention in more detail: In the cutting tool 1, which is cylindrical in the example shown, the cutting knife 2 revolves with the cutting edge flight circle 3. The counter-knife barTi 4 at the end of the wood feed shaft 5 contains the counter-knife 6, which can be fixed with the aid of the clamping plate 7 and the screw 8. The counter knife 6 consists of several strung together hard metal strikes, which are roof-shaped on the narrow sides with a wedge angle of about 90 ° If a notch has been made in a part of the counter knife by a foreign object such as a stone or metal inclusion, it is sufficient to replace the hard metal strip at this point, while with continuous counter knives always the entire counter knife reground or replaced must become. Protection claims 1. Counter knife for chipping or chipping machines, with a retractable and retractable counter knife bar, which is equipped with the actual counter knife outside the machine characterized in that the counter knife consists of clamped hard metal strips. 2. Counter knife according to claim 1, characterized in that the hard metal strips clamped diagonally in the counter knife bar are. 3. Counter knife according to claims 1 and 2, characterized in that that the hard metal strips are roof-shaped on both sides to form a cutting edge with an approximately 90 ° wedge angle. ouin Protection claims 1. Counter knife for chipping or chipping machines, with a retractable and retractable counter knife bar, which is equipped with the actual counter knife outside the machine characterized in that the counter knife consists of clamped hard metal strips. 2. Counter knife according to claim 1, characterized in that the hard metal strips clamped diagonally in the counter knife bar are. 3. Counter knife according to claims 1 and 2 _3, characterized in that the hard metal strips are formed roof-shaped on both sides to a cutting edge with eh / va 90 ° wedge angle. 7716045 oi.09.77