Best Conveyor Belt Jointing Method: Why Hot Vulcanization Is the Ultimate Solution for Heavy-Duty Belts

In industries such as mining, steel, and construction, conveyor belts are the lifeline of material transportation. However, the performance and service life of the entire conveyor system depend heavily on the quality of the belt joint. Many companies have experienced unexpected shutdowns and costly downtime—sometimes amounting to tens of thousands of dollars—due to weak or failed joints. Choosing the right conveyor belt splicing method is therefore essential to improving efficiency and reducing operational costs. In this article, we’ll explore the most reliable and widely recognized solution today: “Hot Vulcanization Splicing”, and how it solves real-world problems for industrial users.

1. Comparing 3 Common Conveyor Belt Splicing Methods: Why Hot Vulcanization Leads the Way

There are three main methods of conveyor belt jointing in the market today: hot vulcanization, cold bonding, and mechanical fastening. Each method has distinct advantages and limitations depending on belt strength, durability, and application environment. The table below summarizes their key differences:

As the data shows, “hot vulcanization” offers far superior joint strength and durability, making it the top choice for industries requiring continuous and stable operation. For example, in mining sites, a single joint failure can halt production for hours, while hot vulcanization joints can minimize such risks significantly.

2. Four Core Advantages of Hot Vulcanization Jointing

• “Near-Original Strength — No Weak Points” – Hot vulcanization allows rubber to fully integrate with the fabric or steel cord structure, creating a seamless bond. Unlike adhesive or mechanical joints, it can withstand greater tension and impact, ensuring uninterrupted operation for 1–2 years in high-capacity systems.

• “Lower Maintenance Cost and Less Downtime” – The smooth, flush joint surface prevents belt misalignment and roller wear. A steel mill reported reducing maintenance frequency from twice a month to once a quarter, saving over $7,000 annually and cutting downtime losses by over 80%.

• “Outstanding Stability in Harsh Environments” – Whether exposed to heat, moisture, or dust, hot vulcanized joints maintain performance. Tests show only 5–8% strength loss between −20°C and 60°C, compared to 20%+ degradation in cold-bonded joints.

• “Standardized Process — Consistent Quality” – Hot vulcanization follows strict process parameters for temperature, pressure, and curing time, ensuring repeatable and reliable results. Unlike adhesive bonding or mechanical fastening, it minimizes human error and performance deviation.

3. Hot Vulcanization Splicing Process: Key Parameters and Steps

While hot vulcanization may seem complex, it’s actually straightforward with the right equipment and parameters. Here are the key process parameters for belts of different thicknesses and the five-step standardized procedure:

“Standardized Five-Step Process:”

① Belt End Preparation – Cut the belt ends at 45°–60°, peel off surface rubber, and expose the fabric or steel cords.

② Cleaning and Primer – Wipe the surface with acetone and apply hot vulcanization primer evenly; allow 5–10 minutes for air-dry.

③ Layering – Place uncured core rubber and cover rubber sheets evenly, ensuring no bubbles or gaps.

④ Heating and Pressurizing – Clamp with vulcanizing press, apply temperature and pressure according to parameters, and maintain curing time.

⑤ Cooling and Finishing – Cool naturally to room temperature, trim excess rubber, and ensure smooth surface alignment.

4. When Should You Choose Hot Vulcanization?

Hot vulcanization is the only method suitable for the following conditions:

• Conveyor operates over 16 hours per day with minimal downtime tolerance (e.g., mining, ports).

• Heavy-load or abrasive materials such as ore, slag, or aggregates are conveyed.

• Harsh environments including high temperature, humidity, or chemical exposure.

• Steel cord conveyor belts requiring high tensile strength and durability.

Still unsure whether your conveyor belt needs hot vulcanization? Contact our technical experts today for a “free customized splicing solution”. We’ll analyze your belt type and working conditions, and even provide a complimentary copy of our “Hot Vulcanization Quality Inspection Manual”.