As outlined by Ambrell, a cap to container seal is produced through the help of a laminated disc composed of a wax layer, aluminum layer and a polyethylene (PE) layer. The aluminum layer works as a susceptor, induction heating units to around 125 to 150 degrees C inside the electromagnetic field made by the induction coil. It then warms up the wax and PE layer sufficiently to produce a hermetic seal between the cap and container. Heating time is under a second within this high-speed, low energy consuming automated process.
Sealing caps on food containers and medicines are pretty much taken for granted, but picture the safety and health dangers, plus the nasty molds, consumers could be subjected to if these caps weren’t properly sealed. The most extended induction application in this sector is the high-speed hermetic sealing in tamperproof packages, cap sealing and aseptic packaging. This procedure guarantees the integrity of the seal, as well as the preservation of the product for extended periods of time.
One of the leading advantages of induction heating is its energy efficiency. “Reduced energy usage within the manufacturing process is actually a win-win for building a competitive advantage,” says Mark Davis, Inside Sales Manager of Eldec Induction LLC. “Becoming environmentally friendly in manufacturing is more than a philosophy, a strategy, or possibly a responsibility. It simply makes good ‘cents’ to lessen and conserve. Induction hardening or heating releases less internal residual stresses on account of the best possible energy input – measured in kilowatt seconds – and, therefore, only a small fraction compared to the total mass that needs to be quenched during the final heat treatment. The smallest possible energy input and resulting reduced energy consumption translates straight into improved environmental benefits.”
Induction heating is an eco friendly option to induction melting furnace, including blowtorches, oil baths, ovens and hot plates. These expensive methods produce smoke, fumes and oil waste, and so are hazardous to personal safety and working environments.
But there are dangers related to the induction way of heating. Fortunately, the 2014 edition from the National Fire Protection Association’s NFPA 70: National Electric Code addresses these concerns with specific guidelines for warning labels, signs and equipment marking.
Warning labels or signs that read, “Danger – High Voltage – Keep Out” will probably be connected to the equipment and also be plainly visible where persons might come in contact with energized parts when doors are opened or closed, or when panels are removed from compartments containing 150 volts, AC or DC.
In addition, a nameplate has to be affixed for the heating equipment, giving the manufacturer’s name, model identification along with the following input data: line volts, frequency, amount of phases, maximum current, full load kilovolt-amperes (kVAs) and full load power factor. Additional data is permitted.
Incorporating best safety practices involving induction heating can be achieved with advice from suppliers who uses induction heating techniques for new product development, process dexjpky33 and troubleshooting. Consultants work primarily with operators and line forepersons who are accountable for day-to day-equipment operations. Best practices include using lockout devices when servicing equipment.
Signs and labels must be utilized in facilities to warn workers regarding the hazards of utilizing induction heating on power supplies and coils that utilize high voltage. Another recommendation is using personal protective equipment (PPE) associated with dealing with induction brazing machine. All equipment should utilize light guards or similar protective devices to prevent both experience of the coil and moving mechanical assemblies that may harm the operator during automatic operations.