During the processing and finishing of materials which are insulating in one form or another (e.g. paper, textiles, glass, wood, chemicals, plastics), electrostatic charges are virtually inevitable. Charges develop when materials are processed and rub against one another, or when objects formerly in contact are suddenly separated, or when materials are joined, bonded, glued or welded. The problem lies not only with the materials but with the energy used to move these materials. The higher the speed is, the more trouble the electrostatic charge can cause.
Did you know?
That fast cycle, multiple cavity moulding processes generate a small static charge on each item. These charges can build up and cause problems in poly lined and plastic transit bins. In fact, things can get so bad that the product can actually “creep” up the sides of the bins and out onto the floor. Needless to say, this causes a multitude of problems from contamination to feed problems in secondary processes and the oldest problem of all – operators suffering painful static shocks when handling the bins.
DO YOU HAVE THESE PROBLEMS?
Renmar's specialist engineers can visit your site to monitor the static charge being created and look at the workflow. They can then offer tailored solutions, such as fitting special air assist static eliminator electrodes at the ends of conveyors. With this solution, all of the parts drop through an ionised air curtain to reach the transit bins, immediately static discharging the components to a minimal level, preventing high levels o static charge building up in bins or boxes and thereby solving both the manufacturers’ and the end users’ problems.
These basic principles can be adapted to resolve similar problems for various moulded components, ranging from caps and closures to large precision mouldings such as automotive lighting.
The difference is control. Static electricity is part of many manufacturing and finishing processes. It is an undesirable “villain” when it develops spontaneously, impacting workflow, productivity and quality. Technology must be applied to neutralize it. But it can also be deliberately generated and controlled to benefit workflow, improve quality and increase productivity.
Unwanted, destructive effects
In today’s production processes, increasingly larger material quantities need to be moved at ever increasing speeds, with the inevitable result that electrostatic charges also increase. Uncontrolled electrostatic energy causes production disruptions. Materials clinging together because of static charge attraction is just one example of static as a "villain.".
Electrostatic energy can also be a “hero” when it is purposely and creatively applied to improving a production process. The results are often quite remarkable! In spray-painting of cars, for example, the atomized paint can be given a charge of one polarity and the car body given an opposite charge. Thus, the fine paint mist is uniformly attracted to every part of the body and little remains in the air. Even paint coverage can be assured, the process completed faster, using less material and free of sags and runs. In the printing industry and in the production of films and foils, some processes generate such high levels of static charge that they can no longer be carried out without Electrostatic Discharge Systems. On the other hand, production can be enhanced by using electrostatic energy creatively to overcome undesirable effects in manufacturing processes. In all of these situations, Renmar can open new pathways to higher manufacturing quality, efficiency, productivity and profitability.