What is the frequency of the vibrating feeder?

The frequency ratio of the vibrating feeder, the exciting force and the natural frequency, and the motor vibrating feeder can be simplified into a two-degree-of-freedom two-mass forced vibration system. The vibration frequency, amplitude and exciting force are the key dynamic parameters. The vibrating feeder is generally selected to work in the near-resonance area, and the frequency ratio is 0.80-0.95. is the vibration frequency of the feeder, which is determined by the vibration motor. The domestic vibration motor has four vibration frequencies of , , 940 and 710r/min. The amplitude a of the trough should be determined first according to the nature of the material and the amount of feed. In order to reduce the breakage of material particles, the feeder can choose a higher frequency and a smaller amplitude, and for raw ore feeding, a lower frequency and a larger amplitude can be selected.

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The vibration intensity, ejection intensity and jumping coefficient of the vibrating feeder can be known from the movement of the material on the tank body. The condition for material throwing is that the resultant force of the tank body is zero.

The selection of the vibration angle and the installation angle depends on three factors, namely, the conveying efficiency, the wear requirements of the trough and the particle size requirements of the conveyed materials. In order to reduce the wear of the trough, the residence time of the material in the trough should be as short as possible, and the angle should be larger. When the material particles are required, the impact of the material falling into the trough should be as small as possible, and the vibration angle should be as small as possible. Should take a small value. At present, the design angle of the feeder is mostly between 20° and 25°. The installation angle should not be too large. If the installation angle is too large, the material will slide and the wear of the trough will be accelerated. The installation inclination angle is preferably 10° to 15°.

Various models with flexible feeding capacity from fine powders to lumps

As powder/pellets processing equipment becomes more efficient and precise, there is a demand for high-performance feeders that can not only feed and cut materials, but also control the flow rate to the subsequent process quickly and extensively.
In order to meet the demands of industries that handle such powders and granules, Sinfonia Technology has manufactured vibration feeders that apply our unique vibration technology, which have already gained a high level of trust from various fields. Sinfonia Technology's vibration feeders, born from our many years of vibration technology and extensive manufacturing experience, promote process streamlining and productivity improvement.

Sinfonia Technology's vibration feeders, which utilize the vibration transport phenomenon, are available in three models: the electromagnetic feeder, the linear feeder, and the rubber spring feeder, which utilizes the vibration caused by the rotation of unbalanced weights.

When selecting a vibrating feeder, it is necessary to fully consider the shape, characteristics, and feed rate of the material to be handled, as well as installation conditions, operating conditions, hopper shape, factory environment, and other factors. Sinfonia Technology has a long track record of delivering vibrating feeders to powder and granular processing plants and has a wide variety of models that are manufactured based on strict tests, enabling us to offer the optimum vibrating feeder for any application or purpose, regardless of the conditions of use.

Small Type Feeders

Features

1. Easy Automatic Feed control
   Easy feeding adjustment by turning the feeding control knob. The feeding volume of vibrating feeders can be easily and automatically controlled through combination of a weighing machine, flow meter, thermometer or motor load, and by detecting fluctuations thereof. Especially by being combined with the weighing machine, the feeder is frequently utilized as a hopper scale for mixing raw materials.
2. Wide range of handling materials
   Vibrating feeder can process a wide range of materials and efficiently convey a variety of materials from fine to massive bodies. The feeder is also suitable for high temperature, high abrasion material feeding. A large-sized feeder having a capacity of conveying iron ore at a rate of 6,100 tons per hour is also available.
3. Low running cost
   Vibrating feeder consume very small electric power by means of utilizing the resonance phenomenon, which is extremely economical. Vibrating feeder&#;s easy structure saves maintenance and inspection time. Furthermore, no friction exists between a trough surface and conveyed material, which relates to trough long life span. As a result, maintenance cost of the vibrating feeder will be dramatically reduced, and cut back cost.
4. Suitable for specialized operation
   A number of feeding modifications are available; dust or gas tight troughs and covers; special inlets and outlets, many more. And also, a waterproof type and a heatproof type are also available.

Model List

Model Drive mechanism Power supply Suitable materials for handling CF/F Type
Electromagnetic Feeders

Resonance type consisting of electromagnet and leaf spring

Commercial single phase Wide range of materials from fine to massive material RFH Type
Rubber Spring Feeders Resonance type consisting of 3-phase induction motor, rubber spring and unbalanced weight Commercial 3-phase Pulverulent, granular and massive materials

1.The max.feeding capacities apply to standard flat-bottm open type with skirts when bulk density of sand is 1.6, though angle is 10° and frequency is 60 Hz.
2. About F Type, feeding capacity can be freely adjusted between 0-100% by adjusting opening ratio of gate.

Conveying capacity for individual materials

Calculating conveying capacity for individual materials

F type Feeders feature a special feeding system in which the trough vibrates obliquely to feed materials.
The following equation gives the feeding capacity depending on the material to be handled when F type Feeder equipped with the uncovered flat bottom standard trough is used.
Feeding capacity shows for standard sand (bulk density: 1.6, moisture content: 1%, Particle size: 20mesh), and can be obtained from Table 1

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Materials having excessive stickiness, nature of flashing, and a large bulk density are excepted from this equation.

Max. feeding capacity of F type Feeder/Table 1

Mode Max. feeding capacity
(T/Hr) Trough size
width×length
(mm) Voltage (V) Frequency (Hz) Vibration per min. CF-1 2 100×380 100/200 50~70 ~ CF-2 5 120×550 100/200 50~70 ~ CF-3 8 150×610 200 50~70 ~ CF-4 25 380×800 200 45~60 ~ F-152BDT 10 200×610 200/220 50/60 / F-212BDT 35 310×762 200/220 50/60 / F-22BDT 50 356×914 200/220 50/60 / FH-22BDT 65 458×914 200/220 50/60 / F-33BDT 100 558× 200/220 50/60 / FH-33BDT 130 610× 200/220 50/60 / F-44BDT 220 762× 200/220 50/60 / F-45BDT 330 914× 200/220 50/60 / FH-45BDT 440 × 200/220 50/60 / F-55BDT 600 × 200/220 50/60 / F-66BDT 800 × 200/220 50/60 / F-88BDT × 200/220 50/60 /

The max. feeding capacities apply to standard flat-bottm open type with skirts when bulk density of sand is 1.6, though angle is 10&#; (horizontal for modeles F00B~11B) and voltage is 80Hz.

Feeding Capacity for Respective Materials (on 60Hz T/Hr)

The feeding capacities apply to standard coverd type when voltage is 50 Hz, and adjusted to 1.2 times when voltage is 60Hz.

Suspend Method

Hopper Mounting Example

The shape of the hopper is an important factor which determines the supply capacity of the feeder. The required supply capacity may not be able to be obtained depending on the hopper shape. In designing an ideal hopper economical and essintial to full feeder performance, it is necessary to take the following into account.

The rear wall angle α shown in the figure should be 60 degrees or more to ensure smooth flow of material. The front wall angIe β should be 5 degrees smaller than the angle α.

The hopper tends to devolop a bridge at the throat indicated by the letter, T, so the part T should meet the following conditions.

&#; 2.5 times the largest massive body if material is not uniform in particle size.
&#; 4 times the largest massive body if material is relativery uniform in particle size.

The gate opening B should be at least 2 times the largest massive body, and increase in direct proportion to the required capacity. The standard gate opening rate B is 1.2 to 1.5 times the material layer thickness d, which can be calcuIated by the following equation.

The hopper opening rate W should be 2.5 times the largest massive body if material is not uniform in particle size, or 5 times the largest massive body if material is relatively uniform in particle size.

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