JP4101386B2 - Impact mill for producing fine debris from wood chips - Google Patents

Description

[0001]
BACKGROUND OF THE INVENTION
The present invention relates to an impact mill for pulverizing fine debris, ultrafine debris, powder or powder from a charge.
[0002]
[Prior art]
The above charges include, for example, sawdust or sawdust, cutter ring waste, cutter shaft waste, scrap from used or residual wood, annual plants, chopped waste paper, and all other possible to be crushed Consisting of In this regard, see B. Maier Zerkleinerungstechnik (B. Meyer Zeer Kleinerung Steinique pamphlet “Pralfiner MPF” printing memorandum, 217 / 3-93.
[0003]
This kind of impact milling operation takes place in a working space between the rotor impact strip and the so-called grinding track. The grinding track is a component of the housing. This component bordering the workspace is subject to relatively large wear. Abrasion is particularly large on impact strips fixed to the outer periphery of the rotor. For this reason, it is necessary to frequently replace the impact thin plate.
[0004]
Removing a worn impact strip and installing a new impact strip is extremely time consuming and cumbersome. It is necessary to disassemble the rotor completely. However, replacing the rotor is not only labor intensive, but it also causes production loss because the mill stops.
[0005]
[Problems to be solved by the invention]
SUMMARY OF THE INVENTION An object of the present invention is to provide an impact mill according to the premise of claim 1 so that a worn impact strip and a new impact strip can be replaced quickly and easily compared to the prior art. .
[0006]
[Means for Solving the Problems]
This problem is solved by the configuration described in the characterizing portion of claim 1. As a result, the labor required for replacement is significantly reduced, and the construction cost is the same as or lower than the conventional one. The fixing device considered in accordance with the present invention is less expensive to manufacture than conventionally used screw connections. According to the present invention, the rotor may remain installed in the housing. The impact plate can be inserted without difficulty.
[0007]
DETAILED DESCRIPTION OF THE INVENTION
Hereinafter, the present invention will be described in more detail with reference to the drawings.
FIG. 1 is a vertical axis sectional view of an impact mill.
FIG. 2 is a partially enlarged view of a rotor provided with an impact thin plate.
FIG. 3 is a vertical axis sectional view of the object of FIG.
4 is a cross-sectional view of the object of FIG. 3 taken along section line AA.
[0008]
The impact mill illustrated in FIG. 1 has a rotor 1. The rotor 1 is surrounded by a grinding track 2. The grinding track 2 is fixedly fixed to the housing 3. The housing 3 has an inflow part 3.1 and an outflow part 3.2.
[0009]
The rotor is supported in the housing by a rotor shaft 1.1. The rotor has two discs 1.2, 1.3. The disks 1.2, 1.3 have a large number of carrier plates 1.4 on the outer periphery. An impact thin plate 1.5 is fixed to each carrier plate. Details of the structure of the carrier plate 1.4 and the impact thin plate 1.5 are apparent from FIGS.
[0010]
As best seen in FIGS. 3 and 4, a rivet 1.6 is inserted into each impact strip 1.5 and welded to the impact strip or otherwise fixedly connected. Yes. As another method, for example, coupling by contraction can be considered.
[0011]
Each carrier plate has a rivet 1. 6 and the same number of elongated holes 1.7. The elongated hole has a keyhole shape (see FIG. 2).
[0012]
For the purpose of fixing the impact strip 1.5, the rivet 1.6 is inserted into the slot 1.7, more precisely, the slot where the slot has the maximum width, and as a result the rivet 1.6 can be inserted without difficulty. Next, when the impact strip is moved in its longitudinal direction (see the arrow in FIG. 2), the rivet 1.6 has a slot 1.7 at the point where the slot 1.7 has the smallest width. Abuts against the inner surface.
[0013]
At this point, if the fixed thin plate 1.8 is rotated or moved using a special tool, the fixed thin plate forms a lock portion between the rivet 1.6 and the carrier plate 1.4. The fixed thin plate 1.8 is rotated or moved on the one hand by the carrying plate 1.4 and on the other hand by a special tool that engages the bent portion 1.8.1 of the fixed thin plate.
[Brief description of the drawings]
FIG. 1 is a vertical axis sectional view of an impact mill.
FIG. 2 is a partially enlarged view of a rotor provided with an impact thin plate.
FIG. 3 is a vertical axis sectional view of the object of FIG. 2;
4 is a cross-sectional view of the object of FIG. 3 taken along section line AA.
[Explanation of symbols]
DESCRIPTION OF SYMBOLS 1 Rotor 1.1 Inflow part 1.2 Outflow part 1.4 Carrier plate 1.5 Impact thin plate 1.6 Rivet 1.7 Long hole 2 Track material 3 Housing

Claims (2)

An impact mill for pulverizing soft materials or medium hardness materials such as wood chips and crushed residual wood,
A rotor (1) carrying a number of impact strips (1.5) around it,
A material trajectory (2) surrounding the rotor (1);
Inlet for feedstock (3.1) and an outflow portion for ground product and (3.2) a housing having a (3), provided with,
The impact Hosoban (1.5) is a type by bayonet engagement coupling or clamping coupling, wherein is fixed to the rotor bearing plate provided on (1) (1.4), and the mating coupling or clamping coupling In the impact mill consisting of the bayonet fasteners of <br/>
The impact Hosoban (1.5) has a plurality of rivets (1.6),
Wherein the bearing plate (1.4), the rivet (1.6) and keyhole-shaped elongated hole for engagement (1.7) are provided corresponding to the respective rivets (1.6),
The rivet between (1.6) and the slot (1.7), impact mills, characterized in <br/> the fixed sheet (1.8) is provided to be interposed or rotate . The rotor (1) has a quantity corresponding to the quantity of the rotor shaft (1.1), the rotor disk (1.2, 1.3) fixed to the rotor shaft (1.1), and the impact strip. The impact mill according to claim 1, further comprising a support plate (1.4) for supporting the impact thin plate (1.5).

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