DE1255462B - Process to increase the throughput when sieving with directly and punctiformly knocked sieve surfaces - Google Patents

Description

FND REPUBLIC OF GERMANY

GERMAN

PATENT OFFICE

EDITORIAL

Int. Cl .:

B 07b

German KL: 5JLd - 5/80

Number: 1255 462

File number: R 46187 VI a / 50 d

Filing date: June 6, 1967

Open date: November 30, 1967

The method for increasing the throughput when sieving relates to sieving devices directly and punctiformly abutted sieve surfaces, the latter being framed and this frame fixed to the frame is supported and wherein electromagnetic bumpers are also preferably provided, the Attack the armature directly on the sieve surface. Further it is known to distribute the pushers combined into groups or rows on the sieve surface.

Here it is known to increase the throughput through the arrangement of corresponding to the pushers To increase stops, with which harmonics are achieved.

Nevertheless, the throughput of such screening devices is inadequate.

The invention now seeks a method for further, and indeed substantial, increase in throughput when sieving with directly and punctiformly abutted sieve surfaces and achieves this in the essential in that the excitation of the sieve ao surface by bumping into it during the entire sieving process is interrupted at small intervals, preferably also the interruptions regularly take place.

In addition, an advantageous and inventive measure of the method described above is characterized in that the impact of the screen surface is interrupted over a period of time that equal to, but preferably slightly greater than the gravity-dependent fall-through time of the material to be screened is through the sieve area.

If several are arranged in groups or rows or individually, they have a direct effect on the sieve surface It is particularly advantageous and inventive when initiating the procedure described above the impact at several points on the sieve surface is interrupted at mutually different intervals will.

Furthermore, an advantageous and inventive measure of the method described above is characterized in that the knocking of the screen fabric by means of electromagnetic pushers electronically is interrupted.

Under certain circumstances, it can also be particularly advantageous if at the abutment points with one another different intensity is triggered.

As a result of these measures, the sieving process is repeated over the entire course of the process Way of the Schmidt effect for the resolution, with which a considerable increase of the throughput and a considerable acceleration of a screening process can be achieved.

Process for increasing throughput
when sieving with direct and point-like
knocked sieve surfaces

Applicant:

»RHEWUM«

Rhenish tool

u. Maschinenfabrik G. m. b. H.,

Remscheid-Lüttringhausen

Named as inventor:
Dr. Paul Brüninghaus,
Remscheid-Lüttringhausen

With a predetermined throughput, this also results in the possibility of now using the sieve surface to be selected smaller than when using known sieving methods.

The intermittent interruptions of the nudge also reduce the risk of occurrence counteracted by resonance vibrations, which are particularly common in known sieving processes using framed sieve surfaces that are directly and punctiformly abutted, especially with uneven loading the sieve area is large.

In addition to an increase in performance, the method according to the invention also results in a considerable increase Increased service life for the sieve surfaces achieved.

All newly disclosed individual and combination features are considered essential to the invention.

Claims (5)

Patent claims: 1. Method for increasing the throughput when sieving with direct and point-like abutted sieve surfaces, characterized in that the excitation of the sieve surface interrupted by knocking during the entire sieving process at small intervals will. 2. The method according to claim 1, characterized in that the interruptions are regular take place. 3. The method according to one or both of the preceding claims, characterized in, that the knocking of the screen surface is interrupted over a period of time which is equal to, but preferably slightly larger than that of the 709 690/291 3 4 Gravity-dependent fall-through time of the material to be screened in different locations is through the sieve area. Interrupted at intervals. 4. Method according to one or more of the 5. Method according to one or more of the preceding claims, characterized in preceding claims, characterized, that if there are several in groups, rows 5 indicate that the touching of the sieve mesh with- or individually arranged direct sieve surface means of electromagnetic pusher electronically initiate the knocking of the sieve surface is interrupted. 709 690/291 11.67 O Bundesdruckerei Berlin