In an enrober, the belt sits under a curtain of chocolate. Its pitch, wire and edge decide how products travel, drain and transfer.
In a chocolate coating line, a Trapezoidal Mesh Belt carries products through the chocolate curtain and over the bottoming section, lets surplus chocolate drain through its open structure, and delivers the coated products to the cooling conveyor. Pitch, wire diameter, space count, edge type and drive must suit the enrober.
We are YIYI Mesh Belt (Ningjin Yiyi Mesh Belt Co., Ltd.), a manufacturer of engineered metal conveyor belts for equipment manufacturers, professional distributors and industrial end users, based in Ningjin, Shandong, China. Our manufacturing experience dates back to 1998; the current company was established in 2008. We produce Trapezoidal Mesh Belt on 15 automatic production machines. I am Sunny Ye. Below is how the belt works in an enrober, and what we confirm before making one.
At a Glance
| Product | Trapezoidal Mesh Belt in SUS304 or SUS316 |
|---|---|
| Application | Chocolate enrobers and coating lines for confectionery, biscuits and bakery products |
| Key parameters | Pitch, wire diameter, number of spaces, width, edge (SLE or DLE), pressed or not pressed, sprocket |
| Buyer type | Enrober OEMs, confectionery and bakery plants, distributors, replacement buyers |
| What to send for a quote | Old belt sample or photos, pitch, wire diameter, space count, width, edge type, sprocket photos |
What Does the Belt Do in a Chocolate Coating Line?
The belt carries each product from the infeed, under the chocolate curtain and through the bottoming section, then past the blower and shaker that remove surplus coating. Its open structure lets excess chocolate drain back into the tank. At the end it hands the coated products to the cooling tunnel conveyor.
The older version of this article described the belt as part of melting and tempering. In practice, the belt does not touch those steps. Its work starts where products meet the chocolate.
| Stage | What the belt has to do |
|---|---|
| Infeed | Take products from the feeding conveyor without tipping them |
| Bottoming | Carry products over a chocolate bed so the base is coated |
| Curtain | Hold products steady while chocolate falls over them |
| Blower and shaker | Let surplus chocolate drain through without losing products |
| Transfer | Release coated products cleanly to the cooling conveyor |
Each stage puts a different demand on the belt. Small products need closer support so they do not tip into the mesh. Fast drainage needs open area. Clean transfer needs a flat, stable surface at the discharge end.
Sunny's view: When an enrober inquiry arrives, I ask for the smallest product size first. That number usually sets the pitch.
Why Is a Trapezoidal Mesh Belt Used for Enrobing?
A Trapezoidal Mesh Belt is made from formed wire with a regular pattern of spaces. It gives a flat carrying surface with a high share of open area, so chocolate drains quickly and products sit evenly. It is light, follows small transfer rollers, and can be made to the pitch the product needs.
We select a Trapezoidal Mesh Belt by pitch, wire diameter, number of spaces, width, edge and drive requirement. Those choices decide how the belt behaves under a chocolate curtain.
- Open area lets surplus chocolate fall back into the tank instead of building up under the products.
- Pitch and space count decide how well small or thin products are supported.
- Wire diameter balances belt strength with how much wire touches the product base.
- Flatness keeps coating thickness even across the width.
The older version of this article called the belt "non-stick" and "heat resistant". Stainless steel wire is not a non-stick coating. Release depends on contact area, chocolate temperature, product base and transfer design. Chocolate lines also run at moderate temperatures, so heat is rarely the deciding factor. We prefer to describe what the belt really does.
Sunny's view: If products leave marks or stick at the transfer, look at the transfer gap and the cooling first. The belt is one part of that picture.
Which Parameters Must You Confirm for an Enrober Belt?
Confirm material, pitch, wire diameter, number of spaces, width, edge type, whether the belt is pressed, and whether it runs on sprockets. Our references cover pitch from 4 to 23.8 mm, wire from 1 to 2.8 mm and widths from 76 to 2,352 mm. The approved drawing controls the final belt.
| Parameter | YIYI reference |
|---|---|
| Material | SUS304 / SUS316 |
| Pitch | 4–23.8 mm or custom |
| Wire diameter | 1–2.8 mm |
| Number of spaces | 3 or more |
| Width | 76–2,352 mm or custom |
| Edge | SLE (single-loop edge) or DLE (double-loop edge) |
| Pressed / not pressed | Project-specific |
| Sprocket | Required or not required, by design |
These are reference values, not free combinations. A fine pitch with heavy wire closes the open area; a coarse pitch with light wire may not support small products. An odd number of spaces is common on many belts, but it is not universal, so we count the spaces on your old belt rather than assume them.
Sunny's view: Count the spaces across one wire on your old belt and send me the number with a photo. It saves a day of back and forth.
How Do the Edge and the Drive Affect an Enrober Belt?
The edge decides how the belt holds its width and how it runs past side guides. Single-loop and double-loop edges suit different designs. The drive decides whether the belt needs sprockets or runs by friction. Both must match the enrober, or the belt can wander, wear an edge or skip.
Edge
- SLE (single-loop edge): a single loop at each side
- DLE (double-loop edge): a double loop for a stronger edge
Which one fits depends on the enrober, the guides and the old belt. We confirm it from photos of both edges.
Drive
Some enrober belts run on sprockets, others are driven by friction rollers. Where sprockets are used, the sprocket must match the belt pitch, and worn sprockets should be reviewed with the new belt. We can supply matched sprockets as Drive Sprockets and Related Conveyor Components on a project basis.
Before shipment, we inspect wire diameter, pitch, space count, edge, flatness and finish. Where the project requires it, a sprocket matching check is part of the inspection.
Sunny's view: Photograph both edges of the old belt, close up, with a coin or ruler for scale. The edge is where many replacement mistakes start.
How Should an Enrober Belt Be Cleaned and Maintained?
Remove chocolate before it hardens in the mesh, use warm water or the cleaning method approved for your line, and dry the belt fully before restarting, because water and chocolate do not mix. Check edges, flatness and the transfer end regularly, since that is where wear and damage show first.
Chocolate that cools in the mesh closes the open area, which slows drainage and changes coating thickness. Most plants melt residue off with warm water or steam, or follow the cleaning procedure from the enrober builder.
- Clean at product changes and at the end of each run
- Dry the belt fully before chocolate touches it again
- Check the belt for bent wires, raised loops or edge damage
- Check flatness, especially at the transfer to the cooling conveyor
- Inspect sprockets and rollers for wear and chocolate build-up
Stainless steel is chosen partly because it tolerates frequent washing. For corrosion questions, read why stainless steel belts rust.
Sunny's view: A small kink in an enrober belt shows up as uneven coating long before anyone sees it on the belt.
What Do You Need to Replace an Enrober Belt?
Send a sample of the old belt if you can, or photos with measurements: pitch measured over several pitches, wire diameter, number of spaces, total width, both edges and the sprockets. Photos support a preliminary quote. A physical sample lets us confirm the details, because a worn dimension is not the original design.
Replacement belts are where small errors cost the most. A pitch that is slightly off may run for a while and then climb a sprocket, or leave products tilted in the curtain.
Measure it like this
- Measure across ten pitches and divide by ten, rather than measuring one.
- Measure wire diameter with a caliper at an unworn place.
- Count the spaces across one formed wire.
- Measure total width, edge to edge.
- Photograph both edges, the carrying surface and the sprockets.
From this evidence we prepare a drawing for your approval. For formal custom orders we then run trial production and a complete first article before mass production, and every belt receives a 100% final inspection before packing.
The product page is at Trapezoidal Mesh Belt, and the full specification is on yiyimeshbelts.com.
Sunny's view: If the enrober is critical, ask for a short spare section with the main belt. It costs little and can save a shutdown.
When This Is Not the Right Approach
A Trapezoidal Mesh Belt is not the right choice for every coating step. The cooling tunnel after the enrober often uses a different belt type chosen by the equipment builder. Very heavy products, or lines with long unsupported spans, may need a different metal belt, such as a Balanced Weave Belt or a Flat Wire / Honeycomb Belt. The equipment design decides.
If you cannot provide pitch, space count or edge type, and no sample is available, it is too early to confirm production. Send photos first and we will tell you what else we need.
From Our Engineering Experience
In our reviews of enrober belts, we start with the product, then pitch and space count, then wire diameter, edge and drive. Material comes last, because SUS304 suits most chocolate lines and SUS316 is reviewed when cleaning conditions call for it.
We make Trapezoidal Mesh Belt on 15 automatic production machines in our own workshop, and we draw our own stainless steel wire. That lets us hold pitch and wire diameter consistently from one order to the next, which matters to enrober builders and distributors who reorder the same belt.
FAQ
Why is a trapezoidal mesh belt used on chocolate enrobers?
Its formed wire gives a flat carrying surface with a high share of open area, so surplus chocolate drains through and products sit evenly under the curtain.
Is a trapezoidal mesh belt non-stick?
No. Stainless steel wire is not a non-stick coating. Release depends on contact area, chocolate temperature, product base and transfer design.
What is the difference between SLE and DLE?
SLE is a single-loop edge and DLE a double-loop edge. The right one depends on the enrober, the guides and the old belt.
Which pitch do I need?
Pitch is chosen from the smallest product, drainage and drive. Our references run from 4 to 23.8 mm; the final pitch is confirmed on the drawing.
Can you make a replacement from photos?
Photos with measurements support a preliminary quote. A sample of the old belt lets us confirm pitch, wire, space count and edge before production.
Conclusion
An enrober belt is chosen by product, pitch, space count, wire, edge and drive. Confirm them on a drawing, and send a sample for replacements.
Replacing an enrober belt?
Send a sample or photos with pitch, wire diameter, space count, width, both edges and the sprockets. We confirm the belt with you before production.
See Trapezoidal Mesh Belt specifications →WhatsApp Sunny📄 Trapezoidal Mesh Belt RFQ Application Sheet (PDF) · Email: info@yiyimeshbelt.com
Related reading: Trapezoidal Mesh Belt product page · Metal conveyor belts for bakery lines · Why stainless steel belts rust · How to measure a metal belt for an enquiry (yiyimeshbelts.com)
Sunny Ye
Global Sales Director, YIYI Mesh Belt · 15 years in metal conveyor belt projects
I work with spiral freezer builders, distributors and plant teams on belt selection and replacement. Questions about this article? Send them to me directly.
Follow Sunny on LinkedIn · Last updated: 2026-10-15
