EP1025906B1 - Impact mill for producing fine chips from wood flakes - Google Patents

Description

The invention relates to an impact mill for crushing fine chips, from Finest chips, powder or flour from a feed. The Feed material consists, for example, of shavings or sawdust, Knife ring shavings, knife shavings, shavings from used wood or from residual wood, annual plants, shredded waste paper and all sorts other substances that are to be crushed. On the brochure "impact finisher MPF "from B. Maier Zerkleinerungstechnik GmbH, printed note 217 / 3-93 directed.

The crushing work of such impact mills is between in the work area Baffle bars of the rotor and a so-called grinding track. The Grinding track is part of the housing. The to the work space adjacent components are subject to relatively high wear. This is especially high for the baffle strips on the outer circumference of the rotor are attached. That is why it is necessary to replace the bumper strips frequently.

Removing worn bumpers and installing new bumpers is extremely time consuming and cumbersome. It requires a complete one Removing the rotor. Removing the rotor not only causes Personnel expenses, but also a loss of production as a result of The mill stops.

DE-C-967 033 shows a mill with baffle bars attached to the rotor according to the preamble of claim 1.

The invention has for its object an impact mill according to the To design the preamble of claim 1 such that the exchange worn bumper bars against new bumper bars faster and easier has been going on ever since, and that a lock is made.

This object is solved by the characterizing features of claim 1. As a result, the effort of replacing is significantly reduced, with the same or less structural effort. The
Fastening devices that come into consideration according to the invention are not more complex and less expensive to manufacture than the screw connections used hitherto. The rotor can now remain in the housing. The bumpers can be used effortlessly.

Figur 1

zeigt eine Prallmühle in einem achssenkrechten Schnitt.

Figur 2

zeigt in vergrößerter Darstellung einen Ausschnitt aus einem Rotor mit Pralleiste.

Figur 3

zeigt den Gegenstand von Figur 2 in einem achssenkrechten Schnitt.

Figur 4

zeigt den Gegenstand von Figur 3 gemäß der Schnittlinie A-A.

The invention is explained in more detail with reference to the drawings.

Figure 1

shows an impact mill in an axially perpendicular section.

Figure 2

shows an enlarged section of a rotor with a baffle.

Figure 3

shows the object of Figure 2 in an axially perpendicular section.

Figure 4

shows the object of Figure 3 along the section line AA.

The impact mill shown in FIG. 1 has a rotor 1. This is from a grinding track 2 enclosed. The grinding track 2 is on a housing 3 fixed stationary. The housing 3 has an inlet 3.1 and one Outlet 3.2 on.

The rotor is mounted in the housing 3 by means of a shaft 1.1. It comprises two Discs 1.2, 1.3. These have a variety of on their outer circumference Support plates 1.4. A baffle bar 1.5 is attached to each support plate. The Details of the design of the support plate 1.4 and baffle bar 1.5 result from FIGS. 2 to 4.

As can best be seen from Figures 3 and 4, are in each Baffle bar 1.5 rivets 1.6 used and with the baffle bar concerned welded or otherwise firmly connected. For example, one would come Connection by shrinking into consideration.

Each support plate has a number of rivets 1.6 of the same number Elongated holes 1.7, which have the shape of keyholes - see Figure 2.

For the purpose of fastening a baffle bar 1.5, its rivets 1.6 passed through the elongated holes 1.7, at that point which the slots have their greatest width, so that the rivets 1.6 can be easily passed through. Then the bumpers in shifted in their own longitudinal direction so that the Rivets 1.6 lie against the reveal of the elongated holes 1.7 where the Slotted holes 1.7 have their smallest width.

Now, using a special tool, a locking plate 1.8 pivoted or shifted so that there is a lock between Rivet 1.6 and support plate 1.4. The locking plate 1.8 is by means of a special tool swiveled or shifted, the one hand on the Support plate 1.4 and on the other hand on a crank 1.8.1 Tab washer attacks.

Claims (2)

1. An impact crusher for the fine commnution of materials of soft to medium hardness such as wood chips, crushed residual wood or the like,

   1.1 with a rotor (1) which carries a plurality of impact rails (1.5) on its circumference;

   1.2 with a material track (2) enclosing the rotor (1);

   1.3 with a housing (3) comprising an inlet (3.1) for the charged material and an outlet (3.2) for the crushed material;

   1.4 with the impact rails (1.5) being fastened to supporting plates (1.4) arranged on the rotor (1) by means of positive plug-in or clamping connection;

   1.5 with the fastening comprising a kind of bayonet catch, characterized in that

   1.6 the impact rails (1.5) comprise a plurality of rivets (1.6);

   1.7 a respective number of key-hole-like oblong holes (1.7) on the supporting plates (1.4) are associated with the rivets (1.6);

   1.8 a securing plate (1.8) is inserted or swiveled in between the rivet (1.6) and the supporting plate (1.4).
2. An impact crusher as claimed in claim 1, characterized in that the rotor (1) comprises a rotor shaft (1.1), a rotor disk (1.2, 1.3) fastened to the rotor shaft (1.1) as well as a number of supporting plates (1.4) for supporting the impact rails (1.5), which number corresponds to the number of impact rails.

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