FI80629C - purification Bodies - Google Patents

Description

80629 1 Cleaning I π π 5

The invention relates to a cleaning member in a disc or time chipper.

The disc chopper is mainly used for chipping timber and other organic material and is well known in its basic technology. However, under special conditions, the operation of a standard type of chipper may be unsatisfactory. For example, branches, logging residues, slats and other wood that is difficult to chop may give rise to pieces, sticks and slats when chipping. These can sometimes constrict in the chipper housing on the front of the blade disc or stick to the outer edge of the blade opening in the disc 15, causing loss of power and heating as they rub against the walls of the chipper housing. In an extreme case, the result is an interruption of the work.

To overcome the above disadvantage, improvements have been proposed to the chopper feeders: 20 mm to control the chipping; material as close as possible to the blades. This would minimize the end piece of the material, which often jumps transversely in the feed opening even before the chipping by the blade, then forming interfering slats. However, many lice feeders are expensive and complex, may otherwise complicate chipping, and may not completely prevent slat formation.

Ribs or teeth may also be provided on the outer circumference of the blade disc, which, together with any ribs possibly located on the outer circumference of the chipper housing, crush the intervening slats. There are also ribs arranged on the front surface of the blade disc outside the blades, the purpose of which is to keep the front chamber between the front surface of the disc and the housing free of slats. However, these arrangements prevent the louvers from being detached from the outer corner of the blade opening 35, which, when attached to the blade disc, also rotate beyond the reach of the actual search blades.

2 80629 1 A chipper structure (e.g., F1 69 ^ * 19) has also been proposed, in which the front chamber is provided with a separate outlet channel in the front chamber for getting free-rotating slats, etc. out of the chipper. However, even this solution does not remove the slats stuck to the blade disc, often in the gap between the outer end of the blade and the 5 blade openings.

The object of the invention is to eliminate the above-mentioned disadvantages caused by slats and the like in a disc chipper. In order to achieve the object, the invention is characterized by the elements mentioned in the claims.

10

The invention will be described in more detail with the aid of the accompanying drawings, which show schematically: FIG. 1 a disc chopper to which the invention has been applied, viewed towards the feed opening in the axial direction, the front end removed (section A-A in Fig. 2).

FIGURE 2 shows the same chipper from above, viewed perpendicular to the axis.

20 FIGURE 3 is a side view and section of the same chipper (section D-E of Figure 1), but without cutting the blade disc.

FIGURE k is a section 1 of the chipper from section B of Figure 1 on a larger scale.

FIGURE 5 is the same as Figure k, but from point C of Figure 1.

FIGURE 6, like Figure k, but at 0 in Figure I, at the same time shows the detail of Figure 3 on a larger scale.

FIGURE 7 is a partial section of the chipper at the outer edge of the blade opening as seen in the axis as the blade approaches the cleaning station (section F-F in Figure 3).

35

chipper of Figs 1-3 main parts and the operation is as follows: 3 80 629 1 20 are disposed in the housing shaft 12 supported rotating in the direction of the arrow A disc 13 'through which the blade extending into the openings 15 (shown in the figures only one) is attached to the cutting chipping blade 16. The leading end 20 of the housing 5 and the circumferential part 6 and the front surface 14 5 of the blade disc 13 together form a front chamber 9 in which the actual chipping takes place. The blade 16 cuts the wood or other material generally introduced longitudinally into the chipper through the feed opening 7 into a counterblade 10, the protrusion of the blade 16 from the front surface 14 of the blade disc 13 substantially determining the chip length. The finished chips pass through the blade opening 15 10 to the rear of the disc 13 and further, spun out of the chipper by the discharge vanes 11, through an outlet 8 located on the outer circumference 6 of the housing 20.

Figure k seeks to illustrate how slats, sticks, jokes or other, generally elongate bodies 1+ derived from the material to be chipped 15 may adhere to the outer corner of the blade opening 15, in particular to the gap between the blade 16 end 17 and the blade opening 15. In practice, the blockage k is larger than shown in the figure and sometimes completely fills the outer part of the front chamber 9. However, presenting such in a drawing would be unobtrusive.

Figures 1 and 3 show the basic principle of our invention. It has a cleaning member 1 arranged at the feed opening 7, inside the front chamber 9, so that when the blade disc 13 rotates it is close to the outer end 17 of the blade Ιό ·ό. comes off. In this application, the cleaning member 1 extends as far as the outer circumference 6 of the chipper housing and also closely bypasses the front surface 14 of the blade disc in order to increase the cleaning power.

30

It can be seen from Figures 1, 4, 5 and 6 that during the passage of the blade 16 the clearance between the blade head 17 and the cleaning member 1 decreases, so that the interfering substance k extending up to the outer circumference 6 of the housing is gradually compressed into said clearance and finally cut off. Since the reduction of the clearance 35 takes place in the middle (towards the shaft 12), the blockage formed by the material k protrudes completely from the outer circumference 6 of the housing, leaving the supply opening 7, as will be described below. In order to enhance the shearing effect, the edge 2 opposite the blade end 17 of the cleaning member 1 is knife-sharpened.

* 80629 1 For cleaning and replacing the blades 16, the disc cutter housing 20 can generally be opened in a manner not shown here so that the housing 20 is divided along its diameter, so that the other half can be turned to the side ta? or disconnect completely. Place the 5 racket cleaning 1 in the openable half of the housing 20 to facilitate its maintenance and adjustment. In order to improve the accuracy, the cleaning member 1 may be fixed in an manner not shown here by means of screws or the like.

It can be seen from Fig. 3 that the surface 3 facing the feed opening 7 of the cleaning device 1 forms a sharp, outwardly opening angle (|) with respect to the plane of rotation of the blade disc 13. The centrifugal force caused by the rotating disc 13 ejects the removed interfering material k and other loose material 1in possibly circulating in the front chamber 9 against said inclined surface 3 of the cleaning member 1 15. In this case, the throwing movement in the direction of the plane of rotation of the blade disc 13 turns outwards under the control of the surface 3. The interfering material h then moves through the feed opening 7 to its inlet side, i.e. exactly to the point where the other material to be chipped is led (even by means of several special mechanical feed means). The interfering substance k 20 is thus immediately re-chipped and further transferred to the rest of the finished product.

My angle ^ does not have to be the same at every point of the cleaning member 1. Especially more massive ingredients such as calves, etc. loose-25 open more easily if the angle decreases towards the end of the cleaning member 1. In this case, the surface 3 is mainly helical.

Although the cutting effect of the interfering substances is independent of the position of the cleaning member 1 with respect to the feed opening 7, the cleaning member 1 is positioned at or immediately before the feed opening 7 to provide an ejection effect. For the same reason, the supply opening 7 is extended at a corresponding point, as shown in Fig. 1, all the way to or at least close to the outer circumference 6 of the housing 20. In order to prevent the material ejected by the cleaning member 1 from slipping on the outer circumference 6 of the front chamber 9 beyond the chipping blades 16, the part of the feed opening 7 after the cleaning member 1 has been reduced so as to extend at most in accordance with.

The invention is not limited to the described embodiment, but may vary within the scope of the claims. Thus, there may be several cleaning members or the chipper may be equipped with accessories not mentioned here, such as feeders or, for example, other types of anti-clogging systems associated with the blade disc.

80629 1 A cleaning disc in a disc chopper comprising a housing (20), a feed opening (7) 5 for chipping material at its front end (5) and an outlet opening (8) for chips finished on the outer circumference (6), rotatable inside the housing (20), a blade disc (13) provided with at least one cutting blade (16). wherein at each blade (16) a blade opening (15) extending through the disc (13) for guiding the finished chips to the outlet side of the disc (13), characterized in that inside the housing (20) at the feed-10 opening (7) and / or immediately before a cleaning member (1) extending close to the outer end (17) of the blade (17) is arranged in the space (9) between the front surface (14) of the disc (13) and the front end (5) of the housing (20) outside the orbit (17) of the blade (16), which cuts, crushes and / or detaches the material (4) stuck to the outer corner 15 of the blade opening (15) against the outer end (17) of the blade.

Cleaning member according to Claim 1, characterized in that the surface (3) in the cleaning member (1) facing the feed opening (7) is arranged to form an acute angle () opening outwards with the plane of rotation of the blade disc (13) 20, and each surface (3) ) directs the centrifugal force provided by the blade disc (13) through the feed opening (7) of the ejected material (4) to its inlet side for re-chipping.

Cleaning according to Claim 2, characterized in that the angle (<j?) Is not constant but varies at different points in the cleaning element (1).

Cleaning member according to one of the preceding claims, characterized in that the edge (2) facing the end (17) of the blade (16) of the cleaning member (1) is sharpened.

Cleaning device according to one of the preceding claims, characterized in that the cleaning member (1) is designed in such a way that the distance between the blade head (17) and the cleaning member (1) decreases as the blade (16) passes.

Cleaning device according to one of the preceding claims, characterized in that the cleaning device (1) is fixedly fastened with screws or other fastening means.

Cleaning member according to one of the preceding claims, characterized in that the cleaning member (1) is attached to the openable cover part of the housing (20).

Cleaning element according to one of the preceding claims, characterized in that at the cleaning element (1) the supply opening (7) is arranged to extend outside the chipper housing (20). up to or near the circumference (6).

Cleaning member according to one of the preceding claims, characterized in that the part of the feed opening (7) downstream of the cleaning member (1) is arranged to extend at most up to the orbit (19) of the outer ends (17) of the cutting blades.

Claims (9)

A cleaning member in a disc chute comprising a cover (20), in its front wall (5), inlet opening 5 (7) for the material to be chipped, and also on its periphery (6) discharge opening (8) for finished chips, and a inside the cover (20) rotating, with at least one cutting knife (16) provided with a cutting disc (13) with a knife opening (15) extending through the disc (13) of each knife (16) to guide the finished chips to the disc (13) discharge side, characterized in that inside the cover (20), in the middle of the inlet opening (7) and / or immediately in front of it in the space (9) between the front surface (14) of the disc (13) and the front wall (5) of the cover (20), on the outside 15, a cleaning means (1) extending in the vicinity of the outer end (17) of the knife (20) which provides for cutting, crushing and / or loosening the material (1) is provided on the rotation path (19) of the outer end (17) of the knife (16). 4) which is stuck in the outer corner of the knife opening (15). Cleaning means according to Claim 1, characterized in that a surface (3) facing the inlet opening (7) facing the inlet opening (7) is arranged to form, together with the plane of rotation of the chopping board (13), a leaking opening acute angle {Y), and the surface (3) controls the material (4) which the centrifugal force produced by the cutting disc (13) throws through the feed opening to the feed side of the disc to be chipped again. 3. Purification means according to claim 2, characterized in that vinkein (y7) is not constant but varies in different parts of the purification means (1). Cleaning means according to any one of the preceding claims, characterized in that the edge (2) of the cleaning means (1) is pointed towards the end (17) of the knife (16). Cleaning means according to any of the preceding claims, characterized in that the cleaning means (1) is designed in such a way that the distance between the end of the knife (17) and the cleaning means (1) decreases as the knife (16) passes through the means. Cleaning means according to any of the preceding claims, characterized in that the cleaning means (1) is adjustably fastened by screws or other fastening means. Cleaning means according to any of the preceding claims, characterized in that the cleaning means (1) is attached to the openable lid of the cover (20). Cleaning means according to any of the preceding claims, characterized in that, in the middle of the cleaning means (1), the inlet opening (7) is arranged to extend up to the periphery of the cover (20) or to its vicinity. Cleaning means according to any preceding claim, characterized in that the part of the feed opening (7) located behind the cleaning means (1) is arranged to extend at most to the rotation path (19) of the outer ends (17) of the cutting blades 20. (ans.no: 890809)