Skip to main content

Posts

Showing posts from October, 2014

Radio Frequency heaters for the process preheating plastics

The plastics have became inseparable part human life, the use of plastic and products made by plastics are all around us, plastic has been chosen as alternative to metal post second world war, the popularity of plastic is due to its versatile nature of taking any shape and can be made hard enough for by selective chemical and heating process. Plastics are divided in to two categorizes 1) Thermoplastic 2) Thermosetting Plastic. Thermoplastics are relatively soft in nature and can be heated, moulded in shapes various times. Mostly find application in household such as mug, toys etc. where strength and toughness of plastic product is not desired. On other hand Thermosetting plastics are generally strong and resistant to heat, but they melt the first time they are heated to a high enough temperature and harden (set) permanently when cooled. They can never be melted or reshaped again. Hence rapid heating is desired for melding the thermosetting plastics, which is difficult to achieve fr