Egg tray molding machine working principle and common troubleshooting guide
In the pulp molding and packaging industry, the egg tray molding machine is the core equipment for converting waste pulp into recyclable and environmentally friendly egg trays. Understanding its working principle and common failures not only helps to improve production efficiency but also extends the life of the equipment.
Working principle of the egg tray molding machine
Taking the 4000-7000pcs/h egg tray machine as an example, the operation of the machine is divided into the following steps:
Pulp Preparation
Waste paper is mixed with water and beaten into homogeneous pulp in a pulper and filtered for impurities.
Mold Suction and Forming
Forming mold adsorbs pulp through a vacuum system to form the shape of a wet egg tray.
Transfer and demolding
The mold rotates and transfers the wet egg tray to the transfer mold to complete the preliminary molding.
Séchage
The wet egg tray is processed by a drying system to remove excess moisture to ensure strength and stability.
Common faults and troubleshooting methods
Abnormal pulp consistency
Phenomenon:
The Egg tray is easy to break or has uneven thickness after molding.
Cause:
Incorrect ingredient ratio.
Insufficient or too long mixing time.
Solution:
Adjust the pulp consistency to the recommended value. Usually 2%-4%.
Regularly check the operation status of mixing equipment.
Poor mold adsorption
Phenomenon:
Incomplete molding or rough surface of the egg tray.
Cause:
Insufficient pressure of the vacuum adsorption system.
Clogged or damaged molds.
Solution:
Check the working condition of the vacuum pump, and clean the surface of the mold.
Replace the mold with severe wear and tear.
Poor drying effect
Phenomenon:
The egg tray is cracked or not completely dry.
Cause:
The drying chamber temperature is too low or uneven.
Insufficient drying time.
Solution:
Adjust the chamber temperature to the recommended range. Typically 150°C – 200°C.
Increase drying time or check the hot air system.
Transmission system failure
Phenomenon:
The egg tray does not transfer smoothly.
Cause:
Stuck or damaged transfer belt
Motor failure.
Solution:
Clean the transfer belt and check the motor operation status.
Replace the damaged transfer belt or motor.
Recommendations for use and maintenance
- Clean the mold regularly to prevent pulp residue from affecting the molding accuracy.
- Check the sealing of the vacuum system and air pump every week.
- Regularly add lubricant to the transmission chain and bearings.
- Empty the pulp tank and rinse the equipment before a long shutdown.
Conclusion
Being familiar with the workflow and common problems of the egg tray molding machine, you can reduce downtime and maintenance costs during the production process.
Notre Shuliy 4000-7000pcs/h egg tray molding machine is a stable and efficient choice for customers with high production demand.
