The advantages and Principles of Vibratory Feeders

Vibratory feeders(as known as vibrating feeders,vibration feeders) is suitable for metal and coal feeding system. The materials will be discharged evenly onto the belt conveyor from bunker by using vibratory feeders and will form into a appropriate thickness and width of material layer. Applicable materials can be coal, ore, sandstone, sandy soil and other powder raw materials in food and chemical plant.

Working principle:

The feeding process of vibratory feeders is achieved by the feeding chute doing linear reciprocating vibration periodically which is forced by the special vibrating motor. When the vertical weight of the feeding chute vibration accelerated speed is bigger than the gravitational acceleration, the material will be upthrown and jumped forward along a parabolic path. The feeding chute will vibrate and the material inside the feeding chute will jump forward continuously due to the continuous exciting of the vibrating motor, so that it can achieve the purpose of material feeding. 

The characteristics of the vibratory feeders mainly include the following parts:

1. It can easily control the discharge capacity. You can also control the discharge capacity (tons/hour) by using a inverter.
2. It applies to a wide range of materials, such as powder, granule, block and other materials.
3. Low maintenance cost , because of adopting resonance principle, so the vibration feeder has less power consumption and less wear characteristics.
4. It can be used in special conditions: according to different working condition, the vibrating feeder can be equipped with dust cover, liner plate, sealing part etc.
5. Smooth vibration and reliable operation.
6. Special grid design which can prevent material blockage. The clearance between grids can be adjustable.
7.Frequency conversion motor is optional, you can change the capacity by adjusting the motor frequency which is easy to control the feeding rate without starting motor frequently.

Site Application of Trommel Screen and Inclined Belt Conveyors

Trommel screen and inclined belt conveyors is widely used in conveying and screening industry.They are specifically for processing bulk materials such as coal, construction material, stone, sand, compost, woodchip, soil and related products.

In real manufacturing process, trommel screen and inclined belt conveyors are the most important parts in the production line. At the same time , it is in response to customer demand for handling larger volumes. Also, as modern production system, it can not only save energy and optimize throughput requirements, but also improve the efficiency of production and provide suitable solutions across a wide range of sectors for our customers. It is also another option to our customers to save more costs.

We have been in manufacturing belt conveyor, vibrating screen, bucket elevator, screw conveyor, scraper conveyorfor many years. With the development of our company, we will manufacture higher quality products to meet our customers’ requirements better.

Structures and Features for Three types of Rotary Vibrating Screen Net Rack

Rotary vibrating screen is designed as a high-precision screening machine it is widely used for sugar, salt, wheat flour, rice flour, pigment, medicine powder, ceramic, silica sand, metallurgy zinc powder, aluminum powder, iron powder, calcium powder etc.

The net rack is the important component of rotary vibrating screen, here we will introduce the structures and features of three common net racks for rotary vibrating screen.

1.U-shaped net rack 
It belongs to the very commonly used model of rotary vibrating screen, first use the pressurized tooling to fix the thick wire diameter of screen mesh in the U-shaped groove, this layer is called meshed net, then the working net is tiled above the meshed net and clamped it. The advantage of this type of net rack is the replacement of working net in a faster rate, the framework of meshed net supports the working net to ensure the flatness of screen surface and prevent the impulsive force of material causing damage of working net, at the same time also will avoid the damage of working net due to the strike of bouncing ball that on the screen plate. The only disadvantage of this type of net rack is the overlapping part of meshed net and working net, which will influence the screen area.

 

2.Snap fastener net rack 
Rotary vibrating screen has two flanges: convex and concave. The concave flange is welded inside the screen frame, while the convex flange is a movable component, the screen mesh is placed between two flanges and locked up with the screw, the screen surface will tension naturally. Generally, this net rack structure is designed for the screen mesh with 12 mesh-30 mesh.

3.Dual A net rack
It also known as the single net with dual clamp net rack or light weight net rack structure. Rotary vibrating screenwith this net rack is using two ring shaped circular hoop fix tension screen mesh. The main advantage of this type net rack is higher screening rate. 

How to Prolong the Life Span of Circular Vibrating Screen?

Circular vibrating screen is widely used for building materials, chemical, food, abrasives, plastic, medicine, chemical fertilizer, metallurgy, glass, food, ceramics etc.

The following are the methods to prolong the life span of circular vibrating screen which might give you some ideas during the operation:

1.The bolts which connected with the body and screen box of circular vibrating screen are strength bolts. It cannot be replaced by using normal bolts to connect with the body and screen box. The fastening of bolts must be checked regularly, at least once a month. Loosen of bolts might occur if any bolt is loosen, which will cause damage to linear vibrating screen.

2. The space between side plates and mesh sieve box must be equal during replacing the woven mesh. First of all, tighten up the flat steel in the middle. At the same time tighten the mesh surface tension and ensure the surface tension is uniform and constant. Then, slightly tap the mesh surface tension along the entire length by using a hammer to check the tension. One of the reasons for woven mesh to damage in shorter period is due to the tension, either not enough or uneven.

3. The temperature of bearing should not exceed 75°C during normal operation. This is because there is a running-in process of new vibrator which might cause the higher temperature, but the temperature will be stable after running for 8 hours. Check the standard, oil level and purity of oil if the temperature remains high. 

How to reduce noise during application of rotary vibrating screen effectively(1)

 Rotary vibrating screen is a powder screening equipment with high accuracy. There are various noise might occur during the operation. The louder the noise will cause the greater damage to rotary vibrating screen, thus it is very important to find out the reasons of noise, analyze the reasons and find out the solutions to solve the problem effectively. The following are the reasons and effective solutions for noise occurs in rotary vibrating screen:

1.In order to fix rotary vibrating screenequipment during the process of transportation, the bolts will be added with the means of transport. However, the bolts that connected to rotary vibrating screen equipment might be left and causing noise during operation.
Solution: remove the bolts

2.The clamp bolts are not tighten.
Solution: check and tighten up the clamp bolts.

3.The clamp bolts are not completely jointed.
Solution: open and re-joint the clamp bolts, ensure the clamp bolts are jointed completely.

4.Due to the operation of rotary vibrating screen, the plate that is used for supporting the bouncing ball might be deviated from its place or it might be damaged.
Solution: re-locate the plate to its original place if it is deviated, or replace a new place if it is damaged.

Trommel Screen for Wooden Chip will Deliver to Thailand

After one month’s production, trommel screen ordered by Thailand is ready for delivery. The screen is used for wood chip processing and production line. According to the specification and requirement that client gives, our engineer suggest a shaftless type drum screen to meet the requirements.

Trommel screen is widely used in chemical, coal, construction, gold mine, plastic,quarry, recycling, metallurgy, mineral-selecting industries, etc. It can be sealed designed without dust pollution .PK Machinery offer both drum screen with and without shaft, we will suggest suitable one based on the technical data client offers.