In industrial conveying, conveyor belts are mainly divided into two categories according to their uses: heavy and light conveyor belts. Heavy conveyor belts are mainly made of rubber and are widely used in heavy industrial fields such as coal and mining, and are responsible for transporting bulk materials. Light conveyor belts have attracted much attention due to their diverse materials and rich application scenarios. Common materials include PU conveyor belts, PVC belts, silicone belts, and Teflon belts. These conveyor belts need to be connected to a ring before they can be used, so the joint method is directly related to the conveyor belt’s service life and operating efficiency.

Detailed explanation of mainstream joint methods for light conveyor belts

Tooth joints: the preferred solution for high strength
Tooth joints are currently the most commonly used and most reliable joint method for light PVC conveyor belts. The process includes:
Precision tooth punching: Use professional equipment to process precise tooth structures at both ends of the conveyor belt
High temperature vulcanization: Make the teeth interlock and completely fuse under specific temperature and pressure
Thickness control: Ensure that the joint part is completely consistent with the overall thickness of the belt
The advantages of this joint method are:
The joint strength can reach 90% of the rated strength
Smooth operation, almost no vibration
International general standards, wide range of applications
It is especially suitable for occasions such as 5.3MM patterned light conveyor belts that require high running stability.

Overlap method: economical and practical choice
The overlapping process includes the following key steps:
① Layering: Use a professional layering machine for precise layering
② Surface treatment: Fine grinding to ensure the flatness of the bonding surface
③ Gluing process: Use special glue for layered overlapping
④ High temperature curing: Complete the final fusion through a vulcanizer

Technical features:
The thickness of the joint is consistent with the conveyor belt body
The tensile strength can reach 75% of the rated strength
Relatively low cost and easy maintenance
Steel buckle joint: a quick installation solution

Steel buckle joints are mainly suitable for:
Occasions where the equipment structure is complex and difficult to disassemble
Production environment where the conveyor belt needs to be replaced frequently
Conveyor system for temporary use

Operation process:
Select a matching steel buckle model according to the thickness of the conveyor belt
Use a special steel buckle machine to fix the steel buckle on both ends of the conveyor belt
On-site installation only needs to buckle both ends and fix them with steel wire

Precautions:
Only applicable to light conveyor belts
Long-term use may affect the life of the steel buckle due to loosening
The maximum tensile force is limited and not suitable for heavy loads

In-depth analysis of the causes of joint fracture

Overload operation
This is the most common cause of joint failure. The joint will be damaged first when the actual load exceeds the design value.

Improper roller design
Too small roller diameter will lead to:

Increased bending stress of the conveyor belt

Additional torque at the joint

Accelerated fatigue damage at the joint

Improper tension adjustment
The following measures are recommended:
Regularly check the tensioning device
Adjust the tension according to seasonal changes
Maintain appropriate initial tension

Improper operating parameters
Includes:
Speed ​​exceeds design standard
Continuous operation time is too long
Start and stop too frequently

Natural aging
Mainly manifested as:
Hardening of the joint
Deterioration of adhesive performance
Reduced mechanical strength

Scientific selection suggestions
Priority of considerations
Conveyed material characteristics (weight, shape, etc.)
Working environment (temperature, humidity, etc.)
Operation parameters (speed, duration, etc.)

Maintenance convenience requirements
Recommended solutions for different scenarios
High-load continuous operation: toothed joints are preferred
Normal working conditions: overlap can be used
Temporary/quick replacement needs: consider steel buckle joints

Maintenance points
Regularly check the joint status
Clean up residual materials in time
Avoid mechanical damage

The selection of joints for light conveyor belts needs to comprehensively consider factors such as the use environment, load requirements, and economy. A high-quality raw material formula combined with appropriate joint technology can significantly extend the service life of the conveyor belt. It is recommended that users consult professional technicians when purchasing, select the best solution according to the actual working conditions, and establish a complete maintenance system to ensure the long-term and stable operation of the conveying system.