Vibration shaker table

Types of vibration shaker tables

Vibration shaker tables are industrial machines that use controlled vibrations to separate materials based on size, weight, and density. They are available in various types designed for specific tasks and are usually found in the mining, food processing, and recycling industries.

• Conveyor shaker tables: This type of shaker functions similarly to a traditional shaker table but has integrated railing conveyor systems to transport separated materials to desired locations. The combination of vibrating decks and inclined angles causes material separation while the conveyor belt aids in the further downsizing and sorting of materials. Conveyor shaker tables are commonly used in the mining industry to separate valuable minerals from waste rock.
• Wavelength shaker tables: Based on the table's fixed width, the wavelength of the vibrations can be adjusted. In this case, the distance between the waves should be more than the material particles to achieve optimal separation. Longer wavelengths mean that the vibrations will move slower and be gentler, which is best for separating lighter and finer materials. Shorter wavelengths are faster and more vigorous, which are preferable for heavier and larger materials.
• Feed-controlled shaker tables: These types of tables are controlled by the amount of material that is fed into them. When accustomed to small and constant support, they work smoothly and effectively, whereas large and irregular ones can cause blockages and turbulence, consequently affecting the separation process.
• Electromagnetic shaker tables: These tables use electromagnetic forces to produce vibrations. They typically have a sturdy table top bolted to a metal frame that contains the solenoid. The coil of wire and core material vibrates when an electric current flows through the coil, and the core expands and contracts, generating a force that shakes the table. Electromagnetic shaker tables are often used to separate lightweight materials like flour, coal, or sand from heavier foreign particles like metal or glass.

Specifications and maintenance of the vibration shaker table

Specifications

• Platform size

  The platform dimensions of shaker tables can vary depending on the intended use. They can be small, like 300x600mm, or big, like 1200x2400mm.

• Frequency range

  Shaker tables have a specific frequency range in which they can operate. The frequency range can be measured in hertz (Hz) or cycles per second. For some shaker tables, the frequency is between 10-50 Hz, while for others, it is up to 200Hz.

• Vibration direction

  Tables can have different vibration directions. Some of them vibrate vertically (towards up and down), while others horizontally (towards right and left) or both (tris-axis).

• Power source

  The shaker table's power source can be electric, hydraulic, or pneumatic. Electric shaker tables can work with high or low voltage. Sometimes transformers are used to change the voltage.

• Load capacity

  Shaker tables' load capacities can also vary depending on the design and purpose. The load capacity might be 10, 50, or 100 kg. If tables carry more weight than their load capacity, they can be broken.

Maintenance

• Cleaning and inspection

  It's important to keep the surface of the shaker table clean. Wipe out the residual materials and dirt after each use of the table. The cleaning process can prevent the crosstalk of different samples and eliminate impurities. Also, inspect the table components carefully. Check and see if there are any loose parts, damages, or signs of wear. Timely repairs or replacements can improve the stability and safety of the tested results.

• Lubrication

  For shaker tables with support columns, guide rails, rollers, or other moving parts, they need lubrication. Lubricate those moving parts regularly to reduce friction. It may prolong the service life of the vibration shaker table and make the operation smoother.

• Vibration debugging

  After maintenance and repair, it is necessary to debug the vibration again. Adjust the parameters such as amplitude, frequency, etc. to ensure that the shaking status is in line with the testing needs and requirements. The operators can refer to the parameter table or manual provided by the manufacturer for debugging.

Usage scenarios of vibration shaker tables

The shaker table has several applications in the mining and construction industries. In the mining sector, gold shaker tables are used to separate precious minerals like gold, silver, and platinum from other minerals. The shaker table harnesses the combination of water flow, vibration, and gravity to sort out minerals based on specific densities. Furthermore, researchers and geologists may employ shaker tables to study the behavior of certain minerals or their features.

In the building industry, shaker tables can help compact soil, aggregate, and asphalt thoroughly. The shaker table's vibration can enhance the material's stability and load-bearing capacity by evenly distributing the particles. Furthermore, a concrete shaker table can smooth concrete surfaces while removing air bubbles. High-quality concrete with better strength and durability will result from this procedure.

Finally, shaker tables help large-scale industries control products during quality inspection. Shaker tables can precisely separate impurities from the intended items with repetitive vibrations. This ensures that only the purest products proceed to the next production phase.

How to choose vibration shaker tables

Wholesale buyers have to look at several factors when buying shaker tables in bulk.

• Purpose

  Determine the intended use of the shaker table. Is it for conducting scientific experiments, separating minerals, or any other specific application? Knowing the purpose will help to select tables with the right features.

• Quality of build

  The frame and table top materials should be able to withstand the intended use. Consider tables that are made of strong alloys for improved durability and anti-corrosion properties. The construction should minimize friction and allow smooth movement of objects on the surface.

• Frequency of use

  Consider how often many people will use the shaker table. If the table is to be used daily, buy those with stronger builds. For occasional use, lighter tables will do well.

• Power source

  Determine if it is better to have electrical, hydraulic, or manual power. Electrical tables are automatic, while manual ones require staff to perform the shaking operations. Hydraulic tables are smooth and easier to control. Consider the costs, typical operation, and maintenance requirements of each option before deciding.

• Shaker table sizes

  The dimensions of the table should match the dimensions of the items to be shaken or separated. The frames and tables tops should accommodate those objects. Also, consider available space where the tables will be placed. The dimensions shouldn't take up too much space in the facility.

• Accessibility

  Consider how easy it would be to use the shaker tables and maintain them. Buy tables that operators can easily reach and comfort.

• Cost

  The cost of shaker tables varies depending on the quality of build and primary features. Decide how much to spend and look for tables that offer the best value within the budget.

Q&A

Q1: What sort of proof load does a shaker table for vibrations test?

A1: A shaker table's proof load will differ based on the table size and shaker power. Small shaker tables proof load may be 50kg, medium ones 200kg, and large ones 500kg.

Q2: What are the limitations of a shaker table?

A2: The maximum weight that a shaker table can move is called the shaker table's force limitation. This is often expressed in Newtons. This limitation is dependent on the power of the shaker motor.

Q3: What are the two types of vibration tests done using shaker tables?

A3: The two common types of shaker table tests are frequency sweep testing, where the product is tested over a frequency range, and fixed frequency testing, where it is excited at a particular frequency and kept there.

Q4: What is the difference between random and sinusoidal vibration tests on a shaker table?

A4: The sinusoidal test excites the shaker table at a specific frequency and unit acceleration for a fixed time. In contrast, the random test covers a wide range of frequencies and involves moving the shaker table to different random locations with varying accelerations for a specified duration.