The core function of grading screens in grain cleaning equipment is to classify grains by size and remove impurities initially. It is a crucial pre-processing step in grain cleaning and is applicable to most common grains and similar granular materials.
The grader machine & grading machine it can used for beans, kidney beans, soya beans, mung beans, grains.peanuts and sesame seeds.
This grader machine & grading machine is to separate the grain, seed and beans to different size. Only need to change the different size of stainless steel sieves.
Meanwhile it can remove the smaller size impurities and larger impurities further, There are 4 layers and 5 layers and 8 layers grading machine for you to choose.
Core Functions:
Grading and Screening: Separates grains into different sizes according to particle size, meeting the requirements for uniform particle size in subsequent processing (such as milling and rice making).
Preliminary Impurity Removal: Separates impurities that differ significantly in size from the grain particles, such as large impurities (straw, stones, large clumps of mud) and small impurities (fine sand, fragments, shriveled small particles).
Pre-treatment Support: Reduces the workload for subsequent fine cleaning processes such as air separation and gravity separation, improving overall cleaning efficiency and purity.
Quality Grading: Differentiates grain quality through grading (such as plump large grains versus small grains and shriveled grains), facilitating separate processing or sales.
Whole Structure of the Machine
The seed Grader& Beans grading machine consists bucket elevator and Grain input vibrating box, stainless steel Sieves, Vibration Motor and Grain out put.
Low speed no broken slope elevator: Loading grains and mung beans and beans to the grader and beans grading machine without any broken.
Stainless steel sieves : Used for food processing.
Vibration Motor :Adjusting the frequency for adjusting the speed of the beans and mung beans, and rice.
Applicable Materials:
Main Grains: Wheat, corn, rice, barley, sorghum, oats, and other common grain crops.
Oil Crops: Soybeans, peanuts, rapeseed, sesame, etc. (Requires matching with the appropriate screen mesh size).
Other Particle Materials: Miscellaneous grains (millet, buckwheat, quinoa), seeds (vegetable seeds, forage seeds), legumes (red beans, mung beans, peas), etc.
What are the effects of the screen surface structure of a grading screen on the cleaning effect?
The Influence of Sieve Aperture Parameters
Aperture Size: Directly determines the grading boundary; the aperture size must match the particle size of the target material.
An excessively large aperture will allow small impurities to mix into the target material, resulting in incomplete cleaning.
An excessively small aperture will hinder the passage of qualified material, reducing processing efficiency and increasing the risk of clogging.
Aperture Ratio: A higher aperture ratio results in a higher material throughput and higher cleaning efficiency.
However, an excessively high aperture ratio will reduce the strength of the screen surface; a balance must be struck between efficiency and durability.
An excessively low aperture ratio will lead to material accumulation, insufficient separation, and increased impurity residue.
Aperture Shape Design: Circular holes are suitable for spherical materials (such as soybeans and peas), while square holes are suitable for flat or irregular materials (such as wheat and rice).
A suitable aperture shape can reduce material blockage and improve screening smoothness.
Special aperture shapes (such as elongated holes) can be adapted to elongated materials (such as oats and barley) to avoid grading deviations.
Impact of Screen Surface Arrangement
Number of Screen Layers: Single-layer screens are suitable for single-level grading or impurity removal needs, with a simple structure and convenient operation.
Multi-layer screens can achieve multi-level grading (e.g., coarse, medium, and fine grading), completing multi-specification separation in one pass and improving cleaning process efficiency.
Too many layers increase equipment resistance; appropriate vibration parameters must be used to avoid material accumulation.
Screen Inclination Angle: A large inclination angle results in rapid material descent, high processing efficiency but decreased grading accuracy.
A small inclination angle results in long material residence time, improving accuracy but reducing efficiency and easily causing clogging.
Adjustments are usually needed based on material flowability; the inclination angle is generally between 10° and 20°.
In addition. For the grader will used with air screen cleaner with gravity table together, for cleaning peanuts, groundnuts, and beans, sesame, it has a very high Effect.
Post time: Nov-07-2025
