How To Choose Suitable Hardness of Rubber Feeder Belt for Carton Folding Gluing Machine

In the carton manufacturing industry, the folding gluing machine plays a vital role in processing and assembling corrugated boxes. One of the key components of this machine is the rubber feeder belt, responsible for feeding blank cartons accurately and consistently into the machine. Selecting the correct hardness of the rubber feeder belt is essential for optimal performance, reduced wear, and improved product quality. This essay outlines how to choose the right rubber hardness based on production needs and machine specifications.

1. Understanding Rubber Hardness

Rubber hardness is commonly measured in Shore A units, typically ranging from 40A (soft) to 90A (hard) for industrial belts. The hardness level affects the belt’s grip, flexibility, and durability. Softer belts offer more surface grip, while harder belts provide better resistance to deformation and wear.

2. Match Hardness to Paper Type and Thickness

For thin or lightweight paperboard, a softer rubber feeder belt (around 45A–55A) is often more effective. It can grip delicate materials without causing bending or creasing. For heavier or thicker corrugated board, a harder belt (60A–75A) may be required to provide sufficient traction and resist compression under higher feeding pressure.

3. Consider Machine Speed and Pressure

In high-speed operations, the belt must maintain grip without slippage, which often necessitates medium-hard rubber (around 60A–65A). Excessively soft belts may wear quickly under fast operation, while very hard belts may slip or damage the cartons. It's also important to consider feeder pressure settings, as harder belts can withstand higher pressure without distortion.

4. Durability vs. Grip Trade-Off

Softer belts offer better grip but wear out faster. Harder belts last longer but may reduce friction, leading to feeding errors. To balance these aspects, many manufacturers choose dual-layer or sandwich-structure belts with a soft outer layer for grip and a hard base for strength.

5. Environmental Conditions

If the working environment includes heat, dust, or humidity, select a rubber material with heat resistance and anti-slip properties, and adjust the hardness accordingly to maintain performance.

Conclusion

Choosing the right hardness of a rubber feeder belt for a carton folding gluing machine depends on material type, machine speed, and operating conditions. By selecting a belt with the correct Shore hardness, manufacturers can achieve consistent feeding, reduce downtime, and enhance overall production efficiency.