FI84571C - disintegrator - Google Patents

Description

84571 5

the diffuser

Desintegreringsanordning

The present invention relates to a diffuser device by which a chip web advancing on a belt conveyor or a similar conveyor is disintegrated at the discharge end of the conveyor as the chip web collapses over the deflection wheel of the conveyor.

10 Diffusers of this kind in particular are needed in chipboard production equipment, where the glued chips are passed to a scattering conveyor. The chips tend to fall over the folding wheel from the chip web in larger agglomerations by splitting. Such agglomerations cause 15 unevenness in scattering.

To overcome this problem, a spike roller located at the unloading point of the belt conveyor, parallel to the folding roller of the conveyor, has generally been used. The spike roll rotates tangentially to the folding roll, and its direction of rotation is opposite to the direction of rotation of the folding roll, i.e., the circumferential movement of the rolls at the tangering point is parallel.

However, the disadvantage of such a spike roll is that the spikes protruding from the roll shell in a certain order may act as a conveyor screw and move the chips unintentionally in the transverse direction of the conveyor. Furthermore, a relatively high circumferential speed of the spike roll is required for the spikes to be able to separate the chips forming the agglomeration from each other.

However, the risk of this high circumferential speed is the impact forces on the chips, which may break the chips, which degrades the structure of the chipboard to be formed, as well as 35 further the dust problem of the completion stage. The chips also get an unnecessarily high output speed for scattering under the influence of the pick roll. The effect of the mentioned disadvantages is further enhanced by the fact that the spike roller rotating at high speed acts as a fan.

An improvement to the above problems has been achieved by a diffuser device according to the invention comprising a stem 10 which extend tangentially to the folding roll.

The device according to the invention forms a flap-like structure for the chip flow leading to the conveyor, which is in a movement which includes a movement transverse to the direction of travel of the chips. As the chips penetrate between the flexible rods, they are forced to move relative to each other, and any bonds between the chips are detached. The transverse movement of the bars of the device helps the chips to settle in the gaps between the bars, and at the same time creates a "shear effect" separating the chips. As a result, the structure of the chip web becomes fluffy and the chips fall loose over the folding-25 wheel.

The invention will be explained with the aid of the accompanying drawing, in which Figure 1 shows a device according to the invention as seen from the direction of travel of the chips, and

Figure 2 shows a device according to the invention seen from the side

In the device according to the figures, the chips are passed as a web 35

II

3 84571 4 conventional ways of spreading 2 chipboard blanks with a belt conveyor. At the point of drop, the chip web collapses over the folding wheel 3, and if it is allowed to collapse freely, the collapse often occurs in larger clumps, especially if the 5 chips are glued. In order to prevent the formation of collapsing clumps, a device is arranged in connection with the deflection wheel 3, which consists of a horizontal arm 5 placed above the deflection wheel 3 and extending downwards along the conveyor, and rods 1 extending downwards therefrom.

The bars 1 are arranged parallel at a distance from each other, whereby they form a gap through which the chip flow must penetrate.

The rods 1 are flexible in structure so that they are able to somewhat dodge the chips both in the direction of travel and in the transverse direction of the chip flow. The arm 5 is kept in a reciprocating axial movement, whereby the rods in a way brush the collapsible end of the chip web 4, and during this time promote the separation of the chips from each other 20 and the settlement in the rod gaps.

There are several ways to adjust the operation of the device. Firstly, the distance between the bars 1, the extent and frequency of the reciprocating axial movement of the arm 5, the compressive force of the bars 25 against the chip web 4 and the angle of inclination of the bars with respect to the conveyor.

The minimum distance between the bars is the minimum number of chips to be sprinkled, the maximum distance is 30 more freely selectable. In practice, this distance measure can be selected from the range of 10 to 100 mm. The skew angle α of the bars 1 can be kept in the range of 45 to 80 °.

During use of the device, the collapse of the chips 35 can be influenced by influencing the movement of the arm 5, changing the extent and / or frequency of its axial movement. Similarly, by rotating the arm, the force with which the 4 84571 bars 1 press the incoming chip web 4 can be changed. As a guide, the magnitude of the transverse movement of the arm can be given an order of magnitude of about 0.5 x the distance between the bars. The frequency of the transverse movement is affected by many factors, such as chip size and belt speed, according to which the usable frequency must be selected in each operating situation.

A practical advantage of the device can also be mentioned that the rods 10 can be brought into contact with the belt 2 passing over the folding roll 3, whereby the rods provide an effective cleaning effect on the belt.

Claims (7)

A device for disintegrating a chip stream 5 discharged from a belt conveyor (2) by acting on a chip web (4) passing over a folding belt (3) of a belt conveyor, characterized in that the device comprises a distance substantially parallel to the folding roll (3) extending across the transverse width of the belt conveyor (2). the arm (5) of the position-10 transverse reciprocating motion component and of the arm (5) to be moved downwards, parallel rods (1) at least a minimum distance from the chips, extending downwards from said arm, extending tangentially to the folding roller (3). Device according to Claim 1, characterized in that the distance between the bars (1) is approximately 10 to 100 mm. 20 Device according to Claim 1 or 2, characterized in that the bars (1) are oriented to form an angle (α) of approximately 45 to 80 ° with the direction of travel of the belt conveyor (2). Device according to Claim 3, characterized in that the angle (α) is adjustable. Device 30 according to one of the preceding claims 1 to 4, characterized in that the extent of the reciprocating movement of the arm (5) is adjustable. 5,84571 Device according to one of the preceding claims 1 to 5, characterized in that the reciprocating sweat frequency of the arm (5) is adjustable. Device 84571 according to one of the preceding claims 1 to 6, characterized in that the pressing force of the bars (1) against the chip web (4) is adjustable. 5