Overview
Plastic tea vibrating screens are specialized equipment used in tea processing to classify leaves by particle size. They replace traditional metal screens, offering advantages like non-reactivity with tea compounds and compliance with food safety standards. These screens are integral to ensuring uniform tea quality, particularly in large-scale production. Their design minimizes leaf breakage while efficiently separating dust and oversized particles.
Structure and Working Principle
The screen consists of a plastic frame with layered mesh panels, each with progressively smaller apertures. An electric motor generates vibrations that sift tea leaves through the meshes. Higher layers retain large leaves, while finer grades pass through to lower tiers. This multi-tiered approach allows simultaneous grading into 3–5 categories, optimizing processing speed.
Key Features
Food-grade plastic construction prevents contamination and resists tea tannins. Unlike metal alternatives, these screens won’t rust or alter flavor profiles. Modular designs enable easy mesh replacement for different tea varieties. Anti-slip bases and noise-dampening features make them suitable for factory environments.
Application Areas
Primarily used in orthodox and CTC tea production lines for size grading post-drying. Also employed in herbal tea processing and quality control labs. Some models adapt for spice or coffee bean sorting, demonstrating versatility in food processing applications beyond tea.
Maintenance and Precautions
Regular cleaning with mild detergents prevents clogging. Inspect mesh integrity monthly, as worn screens compromise grading accuracy. Avoid high-temperature washing (above 60°C) to prevent plastic warping. Store horizontally to maintain frame alignment when not in use.
B2B Procurement Guide
For bulk purchases (10+ units), negotiate discounts of 10–20%. Verify supplier certifications for food-contact materials. Consider modular systems that allow future mesh upgrades. Lead times typically range 2–4 weeks for custom configurations. Sample testing with your tea variety is recommended before large orders.
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