Nylon Cord Rubberizing Calender
Four-roll topping calender for tire cord fabric. A custom-built machine — the stage that decides how well the finished tire holds together.
Nylon cord fabric passes between four heated, high-strength steel rolls. Rubber is fed into the nips and pressed into the cord from both sides in a single pass — every filament coated, no voids, no thin spots.
This is where tire strength is made or lost. Uneven topping means uneven bonding, and uneven bonding shows up later as ply separation. The roll gaps are held to a set value by a closed-loop gap control system, monitored live at the operator station.
PAXTON builds this machine to order. Roll size, drive rating and — critically — the roll arrangement are specified to the fabric and the process before the machine is built.
| Configuration | Four-roll, directly driven |
| Roll sizes | 20″ / 22″ / 24″ (3 models) |
| Drive | 175 / 250 / 300 HP, variable speed |
| Gap control | Roller gap control system, per axis |
| Roll arrangement | Specified to process (see below) |
| Build | Custom, made to order |
Three roll sizes.
| Model | Type | Roll Size (Ø × L) | Drive |
|---|---|---|---|
| PX-CAL-20x60 | Directly driven | 20″ × 60″ | 175 HP, variable speed |
| PX-CAL-22x66 | Directly driven | 22″ × 66″ | 250 HP, variable speed |
| PX-CAL-24x72 | Directly driven | 24″ × 72″ | 300 HP, variable speed |
Choose the roll arrangement.
Four rolls can be stacked seven different ways, and the choice is not cosmetic — it determines how the fabric threads through the machine, how the rubber enters each nip, and what the line can do afterwards. It is decided before the machine is built, not after.
Tell us the fabric, the gauge and the line layout, and we will recommend the arrangement. If you already know which one you want, specify it with the enquiry.
On the line.
Key Features
- Roller gap control — each axis set and displayed independently; the nip holds its value
- Four high-strength steel rolls — heated and cored, topping the cord from both faces
- Variable-speed direct drive — line speed matched to the fabric and the compound
- Seven roll arrangements — specified to the process before build
- Cooling and accumulation — cooling drums and a festoon accumulator downstream, so the calender never has to stop for the wind-up
Why it matters
Coating consistency across the width of the fabric is what a topping calender is judged on. Get it right and the ply bonds cleanly, the tire holds its shape, and the casing lasts. Get it wrong and no amount of care downstream will fix it.
The calender feeds the bias cutter, which cuts the topped fabric to angle for ply building.
Planning a new line or replacing equipment?
Send us your target product, capacity, process and available plant conditions. We will review the equipment scope with you.