Mesh sedimentation plastic dipping line

Product Specification

Equipment Description:

I. Dip Coating Principle
‌1. Fluidized Bed Sedimentation Coating
‌ Utilizing fluidized bed technology, compressed air creates a fluidized suspension layer of PVC/PE powder on a porous, breathable sheet (the fluidization factor requires experimental determination, and the suspension ratio is typically controlled at 30-50%). The mesh then vertically descends into the suspension layer, utilizing gravity and airflow to achieve uniform coating coverage.
‌ The sedimentation design is particularly suitable for large mesh surfaces (such as fences and Dutch mesh), minimizing the airflow interference associated with traditional dip coating.
‌2. High-Temperature Plasticization and Curing
‌ After dipping, the mesh enters a plasticizing furnace (230-250°C), where the powder melts to form a continuous, dense coating. The temperature gradient during the high-temperature curing stage must be controlled within ±5°C to prevent blistering or unmelted coating.
‌ For different materials (e.g., PE requires a high temperature of 400°C), a double-layer oven structure can achieve segmented temperature control, with circulating hot air in the upper layer ensuring temperature uniformity.

II. Process Flow and Key Parameters
1. Mesh Loading → Surface Cleaning → Preheating → Sedimentation and Dipping → Plasticization and Curing → Cooling and Shaping → Automatic Inspection → Finished Product Unloading
2. Key Parameter Controls:
Dip Time: 10-60 seconds (Thickness 0.4-1.0mm);
Plasticizing Temperature: 230-250°C for PVC, 400°C for PE (High-Temperature Range).

III. Technical Parameters and Application Scenarios

Typical Applications:
Anti-corrosion coating for highway fences (load capacity 200-300kg/frame);
Livestock protection nets, welded wire mesh surface coating.

IV. Equipment Advantages
High Efficiency and Energy Saving: Optimized preheating and plasticizing processes reduce energy consumption by 15-20%;
Modular Expansion: Supports optional modules such as exhaust gas purification and automatic detection.

Main structures and components:

I. Core Processing Units
1. Dipping Machine
Fluidized Bed System: Utilizing a porous air-permeable plate and compressed air, this system creates a fluidized suspension layer of PVC powder (with a controlled suspension ratio of 30-50%), ensuring uniform coating adhesion to the mesh.
Sedimentation Dipping System: The mesh descends vertically into the fluidized bed, where gravity and airflow combine to achieve efficient coating coverage. This is suitable for large mesh surfaces (such as fences and Dutch mesh).
Heating Module: Electric heating tubes or gas-fired furnaces provide a temperature range of 150-300°C, meeting the melting requirements of PVC powder (typical plasticizing temperature is 230-250°C).
2. Pretreatment Module
Cleaning Station: Spray or ultrasonic cleaning removes oil and oxides from the mesh surface, enhancing coating adhesion.
Preheating Unit: High-frequency induction heating or a gas-fired furnace preheats the mesh to 80-120°C, shortening dipping time and optimizing coating adhesion.

II. Automated Conveying System
‌1. Chain/Mesh Belt Drive Track
Powered by a variable-frequency speed motor, the line speed is adjustable from 0.5-2 m/min, supporting continuous production.
‌Customized hangers (each with a load capacity of 200-300 kg) are suitable for vertically suspended conveying of meshes of various specifications (such as welded mesh and Dutch mesh).
‌2. Robotic Arm Assembly
‌Integrated automatic loading and unloading robotic arms, linked to a PLC control system, achieve a processing capacity of 80,000-100,000 pieces per day.
‌Equipped with pneumatic clamps to ensure deformation-free mesh conveying.

III. Temperature Control and Post-Processing Unit
‌1. Plasticizing and Curing Oven
‌Double-layer oven structure (customizable length up to 15-20 m), with gas/electric heating in the bottom layer and circulating hot air in the upper layer to ensure uniform temperature (temperature control accuracy ±5°C).
‌The temperature control range covers 230-400°C, suitable for the melting requirements of materials such as PVC and PE. 2. Cooling and Shaping Module

A water-cooled spray or air-cooling system rapidly cools and sets the coating, preventing deformation and sticking.

An optional conductive medium detector automatically identifies defects such as pinholes and bubbles in the coating and issues an alarm.

IV. Control and Environmental Protection System

1. PLC Control Center

Integrated temperature and humidity sensors and a speed feedback module enable automated adjustment of parameters such as temperature, line speed, and dipping time.

Supports fault alarms (such as over-temperature and transmission jams) and emergency shutdown protection.

2. Environmental Treatment Device

Centrifugal filtration waste powder recovery system achieves a powder utilization rate of ≥90%.

Catalytic combustion equipment treats exhaust gas, achieving a VOC emission purification rate of ≥90%.

V. Auxiliary Functional Components

Customized Hangers and Molds

The modular hanger design allows for quick replacement to accommodate different mesh sizes.

High-strength carbon steel frame is heat-resistant and corrosion-resistant.

Features:

1.High cost performance: Based on the customer's product positioning and development strategy, and with economic affordability as the foundation, we achieve the best cost performance.
2.The advanced and meticulous design concept of the equipment, along with the highly automated industrial equipment, showcases the image of a modern and advanced enterprise.
3. It has high adaptability, meeting the current production requirements and reserving room for development, taking into account the needs of increased production and improved quality in the future.
4.Quality compliance strictly adheres to the ISO900 quality management system, with every minute detail of the entire equipment installation being strictly controlled.