Key Questions to Ask When Ordering Vibrating Feeder

The feeder is the first vibrating equipment seeing the large rock fragments coming from the pit. What is important to keep in mind when designing this primary stage?

The main function of the primary vibrating feeder is to absorb the impact and deliver a controlled feed to the primary crusher. It is crucial to always keep a remaining material layer on the vibrating pan in order to absorb the impacts, protect the feeder structure, and increase the wear life.

For more information, please visit our website.

Another important tip for protecting the primary crusher during material unloading is the design of the feeder bin. It has to be high enough to avoid leakage of material at the feeder discharge end. Another solution to consider is to install a preliminary chute before the feeder hopper to increase the distance from the discharge point to the end of its vibrating pan.

Some stones coming from this leakage can "fly over" and impact against the primary crusher at high speed, causing damage. The installation of chains, tires or other similar solutions between the feeder and the crusher can minimize this problem by slowing down the rocks unloaded by trucks.

The screens are important players in the whole process of producing high-quality aggregate. Does the feed arrangement play a role in this process?

The design of the feed chute is key in improving the efficiency of classification, increasing the service life of liners and screening media, and ensuring the structural integrity of the vibrating screen.

The feed material distribution has to be along the entire width of the equipment to take full advantage of the entire screening area of the equipment. The drop height between the chute (or rock box) and the equipment liners has to be limited in order to avoid excessive impact of the material against the equipment, increase the wear life, and minimize the risk of structural failure. Also, the feed material should be located over the feedbox liners and not directly onto the screening media, to avoid premature wear of the first rows of screening panels.

Additionally, internal deflector plates can be installed in the chute whenever possible in order to reduce the speed of the material fed onto the equipment. A lower feed speed minimizes wear and improves the efficiency of classification.

By nature, the screens generate vibrations transmitted to the structure. What are the key points for a good structure design?

Screens, and especially larger screens, must have extremely strong and rigid supports! If the structure lacks sturdiness, the screen will dissipate its vibratory movement, causing the supporting structure to vibrate and either side of the screen to display differences in amplitude and phase.

The key to having a sturdy and reliable supporting frame is to take into account in the calculations the static and dynamic forces generated by the screen. Besides that, the frequency of resonance of the structure and its harmonics need to be very different from the vibrating frequency of the screen. If the speed of operation of the screen coincides with, or is close to, the natural frequency of one or more components of the structure, the vibration will be harmful for both parts. This can lead to serious personal injury and/or damage to the equipment and components.

We recommend that the structural frequency of the supporting structure or supporting frame is at least two-and-a-half times higher than the frequency of operation of the equipment.

The levels of vibrating structure should not exceed the max. allowed limit, measured at the lower part of the spring pads that are fastened to the support, in a tri-axial direction. The max. allowed limit can to be found in the GA drawings of each unit. These values are also inside our Screencheck software.

At Feeding Concepts vibratory feeders are the core competence of our company. We know our wheelhouse and try to stay inside it. We deal and interact with all types of vibratory feeders every day.  Terminology is a key part of design and ordering of a feeder system.  We try to keep it simple and to the point.  When identifying your needs on projects but sometimes some words and terminology can get crossed and can cause miss ordered components.  Below is some basic terminology that can help you through the design of your next feeder order:

Bowl Discharge – XYZ output location of a Vibratory bowl.

Base Drive – Vibrator the bowl is mounted to.

Tooling – Construction that selects correctly oriented parts and removes incorrectly oriented parts.

Confinement Blades – Tooling that confines a part’s movement after orientation.

Jiafu are exported all over the world and different industries with quality first. Our belief is to provide our customers with more and better high value-added products. Let's create a better future together.

Cam – Tooling to rotate a part or thin parts down when feeding parts.

Pit free Surface – Eliminates all small seams / Cavities when welding metals pieces together on part running surface.

Off Tangent – Straight length of discharge track off the center of the bowl.

Basic Bowl– A vibratory bowl with no tooling.

Shingling – Parts that overlap and jam under confinement.

Fan tooling – Tooling Section that uses the parts weight with gravity to allow parts into a hanging orientation

Return Pan – Outside angle pan that brings miss oriented parts back into the basic bowl.

Air Selector – An air jet that engages a part for pre-orientation.

Passivation – Chemical process to inhibit corrosion in medical feeder applications.

Chord section –Tooling that is straight and most of the time machined for part selection.

Scallops – Profile sections that work with inner and outer dimension to select parts.

Pill blades – Tooling that uses multiple points of contact on parts to select leading and trailing orientation.

Profile – Tooling that uses the outline profile of the part to allow part selection and orientation.

Back Pressure Bubbling –  Tooling on feeder bowls that allows for parts to run with no track switch and backup into the bowl falling off back into the basic or return pan.

When ordering your next feeder, we hope the above terminology will help you in bridging the gap on ordering and design, almost all the above terms are used throughout the feeder industry. Here at Feeding Concepts getting a good understanding of your concept and matching it to what we are designing is always the highest priority. If you ever have a question or need a concept of your system we are always happy to help.

For more information, please visit Vibrating Feeder(pt,th,tr).