Dutch fishermen have been catching shrimps for nearly 80 years using trawl nets on either side of their cutters. These trawl nets are kept open by means of a beam and dragged across the sea floor. The rigging comprises a chock string fitted with rubber chocks (rollers); these are dragged along the seabed. Because these chocks only roll across the sea floor, they cause hardly any disturbance to the seabed itself. The rolling chocks cause vibrations that startle the shrimps, causing them to jump from the seabed into the net. The rollers also ensure that the net is kept clear of the sea bottom, which reduces contamination and the by catch of seabed life. If the rollers are functioning correctly, this also reduces the cutter’s fuel consumption. Shrimp fishermen are able to catch shrimps in various locations thanks to the chock strings.

Rubber rollers

The full-rubber rollers are connected to each other by means of steel rods and rings. The size of the rubber rollers and seal rings are decisive for the weight of a chock string. Among other things, the seabed and the power of the vessel influence the type of chock string required. RIS Rubber produces rollers in various sizes and qualities.

Production process of shrimp rollers

We use a compression moulding press for the production of rubber shrimp rollers. This consists of a mould with several cavities, enabling us to produce several rollers at once. The mould and the press ensure the required final shape of the moulded rubber product. The full-rubber rollers are delivered to the customer, who bonds them to metal, as well as connecting them to the steel rods.

If you are looking for a company capable of producing rubber rollers for a trawl net, please let us know. We would be delighted to help you to work out a solution. In addition to rubber rollers, we manufacture other moulded rubber products every day at our production sites in the Netherlands and Bulgaria. Please feel free to contact us without any obligation.

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