Electric Gear Screen Changer: It is designed to integrate the filter screen and extruder die head into the main body door, featuring a simple structure and high reliability.
An electric gear screen changer is a device used in plastic extrusion machines to filter impurities from molten plastic before it enters the die or mold. It uses an electric motor with a gear mechanism to automatically change the filter screen without stopping the production line.
This equipment improves product quality by removing contaminants such as dust, metal particles, paper, or unmelted plastic, ensuring a clean and consistent melt flow.
Main Technical Specifications
Parameter
Typical Specification
Product Name
Electric Gear Screen Changer
Drive Type
Electric motor with gear system
Screen Diameter
80 mm – 300 mm
Motor Power
0.75 kW – 2.2 kW
Working Pressure
20 – 40 MPa
Heating Power
5 kW – 20 kW
Heating Zones
2 – 4 zones
Temperature Range
150°C – 350°C
Material
High-strength alloy steel
Control System
PLC / Digital controller
Voltage
220V / 380V
Main Components
1️⃣ Screen Plate
Holds the filter screens that remove impurities.
2️⃣ Electric Gear Motor
Drives the mechanism that changes the screen automatically.
3️⃣ Heating System
Electric heaters maintain the proper temperature of molten plastic.
4️⃣ Hydraulic or Mechanical Sliding Plate
Moves the screen plate for replacement.
5️⃣ Pressure Sensor
Monitors melt pressure and signals when the screen needs to be changed.
6️⃣ Control Panel
Allows operators to control temperature and screen changing.
Working Principle
Molten plastic from the extruder enters the screen changer.
The plastic passes through a filter screen that removes impurities.
When the screen becomes clogged, the electric gear motor moves the screen plate.
A new clean screen automatically replaces the used one.
The process continues without stopping production.
Applications
Electric gear screen changers are used in:
Plastic extrusion lines
Film blowing machines
Plastic recycling machines
Pelletizing lines
Pipe and sheet extrusion machines
They process materials such as:
LDPE
HDPE
PP
PVC
PET
Recycled plastic materials
Advantages
✔ Continuous production without stopping the machine ✔ High filtration efficiency ✔ Easy screen replacement ✔ Improved plastic product quality ✔ Durable and reliable design ✔ Suitable for high-pressure extrusion systems
Common Screen Sizes
Screen Size
Application
80 – 120 mm
Small extrusion machines
120 – 180 mm
Medium plastic recycling lines
180 – 300 mm
Large industrial extrusion lines
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