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+--- Thread: Why Should the Pharmaceutical Industry Use a Vibrating Screen? (/showthread.php?tid=1026)
Why Should the Pharmaceutical Industry Use a Vibrating Screen? - Ouopio28 - 01-06-2022
What are vibrating screens?
In Vibrating Screens, the vibratory motion is coupled with gravity to make the screening process more efficient. With vibration, the particles of the product placed on the screen mesh jump and hit against the screen openings, more likely to pass through.
Process efficiency is expressed as a percentage. The vibrating screen never reaches 100% efficiency because it would require an extremely long process. However, the most modern equipment achieves high percentages, acceptable for what is required.
Efficiency is calculated as the proportion by weight of the particles that passed out of the total weight of product placed on the screen, expressed as a percentage.
What is a Vibratory Feeder?
Vibratory feeders are short conveyors used to transport bulk materials utilizing a controlled vibratory force system and gravity. The vibrations impart a combination of horizontal and vertical acceleration through tossing, hopping, or sliding-type of action to the materials being handled. Gravity counters some of the acceleration from the vibration and helps move the materials in a certain direction.
A basic Vibrating Feeder consists of a trough supported by springs, hinged links, or other force-dampening mechanical components. These isolate the vibratory feeder from the structural members of the building which can cause unwanted reaction forces. Attached to the trough is a drive unit that produces high frequency, low amplitude oscillations. These oscillations are tuned to create the desired movement of the material.
Dosing Feeders and conveyors have operating frequencies that range from 200 to 3600 vibrations per minute with an amplitude of 1 to 40 mm. The vertical acceleration component is usually near gravitational acceleration (9.81 m/s2). This is enough to transport materials with a gentle shuffling motion producing minimal impact and noise. Because of this, the material moves across the trough by sliding action. The material does not actually leave the surface of the trough when
Vibration Exciter is a cylinder easy vibration molding machine without mold lifting mechanism. It is a device that obtains mechanical vibration by using electric, electro-hydraulic, piezoelectric or other principles. The principle is that the excitation signal is input into a coil placed in a magnetic field to drive the workbench connected with the coil. The electric vibration table is mainly used for vibration measurement above 10Hz, and can excite a maximum pressure of 200N. In the frequency range below 20Hz, Electro-hydraulic Shaking table is often used. At this time, the nature of vibration signal is controlled by electric servo system. The hydraulic drive system can give large displacement and impact force. The vibration table can be used for the calibration of accelerometers, the vibration performance measurement of electroacoustic devices and their vibration test. For different test objects and technical indicators, pay attention to the selection of vibration tables with different structures and excitation ranges.
The Vibrator motor is a coreless DC motor whose size is compact. The original purpose of this motor is to alert the user from receiving the call without sound/vibrating. The main feature of this motor is, it has magnetic properties, is lightweight, and motor size is small.