Mesh Belt Tempering Furnace

Danyang Dingfeng Industrial Furnace Co., Ltd. is one of the most reliable manufacturers and suppliers of mesh belt tempering furnace in China. If you're going to wholesale durable mesh belt tempering furnace made in China, welcome to get pricelist from our factory. All customized products are with high quality and low price.

Product Definition

 

Mesh belt tempering furnace is a continuous furnace – parts go in one end, come out the other. The belt is made of heat-resistant mesh, like a conveyor. Moves the workpieces through heating zones, then cooling.
What's it for? Tempering after quenching. Reduces internal stress, improves toughness, makes the metal less brittle. Good for small to medium sized parts when you're running high volume. Think screws, bearings, small automotive stuff. Not for big forgings – those need a different setup.

Working Principle

 

Here's how Mesh belt tempering furnace runs.
First, you spread the parts evenly on the mesh belt. Stainless steel or a heat-resistant alloy – depends on the temperature. Don't pile them too thick or the bottom ones don't get the same heat. That's a common mistake.

The belt moves. Puts the parts into the furnace chamber. No stopping. The belt speed controls how long they stay inside. Faster belt = shorter soak time. Slower belt = longer soak.

Heat comes from electric elements or gas burners, depending what you ordered. The temperature gets raised to wherever you need it – 300°C for some spring steels, 650°C for others.

A control system – PLC or something similar – watches the temperature, the belt speed, and the soak time. There's usually multiple heating zones. Each zone can be set differently. First zone ramps up, middle zones hold, last zone maybe starts to drop before cooling.
After the parts come out of the heating section, they go into a cooling zone. Air, sometimes forced fans. Then they drop off the end into a bin or onto another conveyor.

That's the whole cycle. Continuous. You just keep loading one end and catching at the other.

• High production efficiency. Non-stop operation. Once it's running, it runs. I had a fastener customer running 24 hours a day, five days a week. They were doing something like 8 tons of bolts per shift. Try that with a batch furnace – you'd need ten of them.
• Temperature uniformity. Each heating zone has a forced circulation fan. Moves the air around so there aren't hot spots. We spec within plus or minus 5°C across the whole belt width. I've measured it at 3°C on a good day. But that depends on how evenly you load the belt. If you pile parts higher on one side, that side runs cooler because the airflow gets blocked. Seen it happen.
• Versatile. You can run all kinds of small parts. Screws, nuts, small springs, bearing rings, clips. No fixturing needed – just dump them on the belt. But don't mix different sizes in the same load unless you know what you're doing. A heavy bolt takes longer to heat than a thin washer. They'll come out different hardness.
• Energy efficient. Good insulation – ceramic fiber mostly, sometimes brick if the customer insists. The heat loss through the walls is low. But the real energy loss is at the ends – the entrance and exit. Heat pours out there. We use curtains or doors to block it, but some still escapes. Nothing you can do about that.
• Easy operation. Belt speed is adjustable with a VFD – variable frequency drive. Turn a dial, speed changes. That's how you control soak time. Faster speed for thin parts, slower for thick. One of my customers printed a chart on the wall: belt speed vs part diameter for different steels. His guys check it every shift.
• Bright heat treatment (optional). You can add a protective atmosphere – nitrogen or endothermic gas. That stops oxidation. Parts come out clean and shiny, no scale. Costs more to run – the gas isn't free – but if you're doing precision work, it's worth it.

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