subject: Sieve Shaker [print this page] A sieve shaker is disclosed which can, for example, be used in plansifters or similar sieving and screening devices for screening mealy or granular products. To increase screening performance, there is provided at least one drop-through channel whose width is, for example, at least 1.5 times that of known sieve shaker.
EP-B-584302 discloses devices for plan sifters, in particular also sieve shaker and sieve shaker frames. Sieve shaker of this type comprise a sieve shaker box with a base plate and an outlet for fine product as well as a sieve shaker frame spanned by a sieve shaker mesh. The sieve shaker frame, like the sieve shaker box also, is divided into sections by means of battens, is free from connecting elements and can be inserted in an interlocking mariner into the sieve shaker box. An insertable sieve shaker frame of this type has sufficient inherent rigidity for it not to become deformed and not to have to be fixed to the sieve shaker box with fixing elements. The sieve shaker frame is preferably made of metal materials and is spanned with sieve shaker mesh. The surfaces of the sieve shaker box which come into contact with the product are preferably coated with plastics material and the base plate consists of metal or plastics material.
Advantageous developments are disclosed in the sub-claims. Two large discharge channels are preferably provided, which are arranged parallel to one another on the outer sides of the sieve shaker box. Sieve shaker with large sifting channels of this type for the overflow can be used, in particular, for control sifting in the case of high outputs of, for example, up to 40 t/h per sieve shaker section. They also allow better air circulation in plan sifters.
The object of the invention is to develop a sieve shaker which is better adapted to the product flow in the sifter, in particular plan sifter, and which is suitable in particular for very high outputs. The object is achieved by the features of claim 1 . The sieve shaker box comprises at least one sifting channel, the width of which is substantially wider than usual (conventional width is approx. 6 cm), preferably at least 1.5 times wider. For example, a width of approx. 13 cm.
