Pursuing.
As is well known, there is a supplied category of small electric shredders for plants and small branches. Often largely made of plastic, they are fragile materials and with very limited capacities, although some are clearly better than others ...
By bias assumed, I would not dwell on these devices which have for them only a low price (although relatively high compared to their possibilities) and a certain ease of use (low weight, limited congestion); Their modest consumption must, however, be related to the volume processed, a comparison which is then much less favorable to them. I see this as troubleshooting solutions and a fairly rapid bulk of waste dumps ...
Yet the success of these small shredders is due to the enormous prices of professional entry-level devices, which are rarely equipped with major improvements: there are 6000 € machines which, despite their high weight, are not driven and must be Displaced with difficulty by hand ...
Let us now examine the various categories of entry-level thermal mills. Of course, we are no longer in the same price as supermarket crushers, but it is always possible to pool their use according to various particular possibilities and thus dispose of a durable, efficient and finally economic equipment.
The category of vegetable crushers, equipped with a large feed hopper, must be distinguished first and foremost, the cutting system is a drum equipped with flails. A priori, this type of grinders is not adapted to BRF and the possibility of chopping tender plants (grasses and leaves, even mixed with soil or gravel) is hardly relevant for the garden of the lazy ...
However, this kind of material allows us to approach a more interesting material, which can be qualified as mixed (and which also exists in reduced versions of the "supermarket" type): it has two feed hoppers, one similar. to the previous one and also intended for plants and everything coming from cleaning a garden and another, smaller and tubular format intended to receive woody and resistant materials; the latter opens onto blades located on the side of the drum and can therefore be likened to an element of a disc crusher. The shavings from the blades are taken up by the central flails to undergo a second fragmentation and be ejected by centrifugation. The disadvantage of this device is that it only allows "broom handles" to be passed, due to the narrowness of the feed tube: it is only a small addition to the main device, allowing a few branches to be treated. too big to be swallowed by plagues.
Another category devoted solely to the crushing of branches is strongly similar to the preceding one, except that it comprises only a medium hopper and that the flails serve only for the refining of the chips of the disk. This category is well represented by the Italian industry, which seems to be able to produce quality equipment at reasonable prices (due to the complexity of the cutting system), but I do not see much interest in our objective, Since the regularity and the fineness of the crushed stone are by no means imperative for us.
To be continued...