Automatic stripping of core-moulded pipe seals

REP international offers a simple and economic solution to a problem that is familiar to manufacturers of pipe seals. The stripping process… often the stumbling block of the moulding process: When performed manually, the stripping process is often very difficult and productivity is considerably impacted; when being performed automatically, the challenge is to do it quickly without any heat loss and without production stoppages, due to overlapping seals.

REP has recently worked on several projects and today offers to its customers a competitive and profitable turnkey solution for reduced size on the automatic stripping of EPDM pipe seals of any size. You can watch the stripping process on http://www.youtube.com/REPinternational.

The solution can be matched to any seal size. It is based on conveyor belts equipped with rotating belts, allowing for the individual stripping of the seals. The belts are designed in compliance with a multi-layer

technology, in order to ensure the reliability of the stripping process and the speed, while observing the quality of the stripped parts. The kit is fully retractable for easy access to the cores on the rear side of the machine.

Project example for a pipe seal of a nominal diameter of 50mm

The machine proposed is an injection moulding machine REP V69Y50 with a clamping force of 400 tons, including a kit specially designed for automatic stripping, a vacuum system, hydraulic top and bottom ejectors and ancillary heating comprising heating elements inside the cores to hold the core

temperature during the stripping process.

The tooling consists of a 208-cavity mould (4 cores) and a 4-nozzle cold runner block.

After the mould opens, the ejectors move out to lift the framesupported cores. The cores move to

the rear of the press and simultaneously the rotation of the two belts allows for sequential stripping of the pipe seals. The runners are automatically stripped and separated from the parts during the core bar

translation: Metal guides are used to separate the runners as the core bars index on the kit.

On this project, the customer's profitability requirements have been met. The stripping time reached for both types of seals was approximately 40 seconds.

The entire system is competitively priced, with an excellent investment/payback ratio. This is a simple, rugged solution that is both reliable and easy to control during production.