Skip to main content

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 from the conventional heating system, it becomes an ideal application for RF heatingsystems because RF heaters quickly and uniformly heats the thermoset plastic resin to softening point for the for molding.
Issues with Conventional process of molding:
Heating certain plastic material in a press, even in powder structure, causes the grains by the hot die to "set" before alternate grains in the volume of the mold get to be delicate. That brings about poor filling of the mold which causes faulty completed parts. Preheating the powder in a stove or on a hot plate alleviates this issue sort of, yet, best case scenario the grains get to be sticky and are hard to handle rapidly without automation. In the event that they are heaped up the heating is not uniform.
To help the taking care of issue, plastic powder is regularly compacted under high weight to make performs. They have consistent shapes, frequently round barrels, and might be effectively moved about by hand. Beforehand the thickness of performs was constrained by worries about curing or setting the compound on the outside without heating the inside. This likewise causes poor filling of the mold holes and harms the presence of the last casting by creating uneven shine and voids.
 Radio Frequency preheating for the molding
Radio Frequency heating provided an excellent solution to the problem of rapid uniform heating of performs because it heats the entire performs up to the molding temperature quite uniformly in 2 to 60 seconds. Time is subsequently available for manually or automatically transferring performs to the mold cavity and closing the press before the full curing takes place. The results are good fill and excellently finished parts. KERONE manufactures the customized RF heaters that will be best suited for the process need to preheating plastic for the molding purpose.   
 List of Plastic products that need RF heating
Plastics products manufacturing that typically uses Radio Frequency heating are for pot handles, circuit breaker cases, instrument cases, automotive distributor and other electrical parts, telephones, radio/TV cabinets, washing machine agitators, dinner ware, knobs, telephone parts, telephone central office equipment, blower impellers, lens mounts, encapsulations for microelectronic components, fabricated from polyester resins reinforced with fiberglass (FRP), molded disc brake cylinders, heat resistant handles, electrical plugs, switches, circuit boards and semiconductor encapsulation and a myriad of others.
1)     Speeding the process: The shorter preheating time and uniform temperature results in free flow of soften resin to mold.
2)     Increased part lifespan:  Differential curing allows for lower internal stresses while providing an even cure with no overheated or uncured areas.
3)     Less mold wear:  Softened resin flows easily into mold and set down after compression only hence it increases the life of Mold. 
4) Increase in Final Output: RF preheating permits bigger product(s) to be created than might be delivered by different means.

5) Improved Output quality: Rapid speed of softening result in the molding of plastics before they start setting.  

Comments

Post a Comment

Popular posts from this blog

Different Types of Sterilization Process

  Sterilization can be accomplished by an amalgamation of heat, chemicals, irradiation, high pressure and filtration such as steam under pressure, dry heat, ultraviolet radiation, gas vapour sterilants, chlorine dioxide gas etc. Successful sterilization strategies are necessary for working in a lab and negligence of this could lead to severe consequences, it could unexpectedly cost a life. So what are the more frequently utilized methods of sterilization in the laboratory, and how do they work? The Sterilization is conveyed out by the methods according to requirement. The methods are: 1. Moist Heat Sterilization 2. Dry Heat Sterilization 3. Gas Sterilization and Others. Moist Heat Sterilization:  Moderate pressure is utilized in steam sterilization. Steam is utilized under pressure as a means of accomplishing an elevated temperature. It is dominant to confirm the accurate quality of steam is utilized in order to keep away the problems which follow, superheating of the steam, f...
Post a Comment
Read more

Microwave Continuous Vulcanization (CV) Rubber Curing Oven

Vulcanization is process of converting natural rubber or rubber polymers into more durable and mechanically strengthens rubber by the process of mixing sulfur and processing. This process results in changing the cross-linking bonds within the natural rubber and making bonds more strong and non-sticky.  Vulcanization curing is achieved by heating the natural rubber or rubber polymer at very high temperature along with sulfur or any other agent, such high level of temperature rise results into changing of bond within the rubber and resulting in non-sticky, maker it lesser deformable when heated, and removes the brittleness this helps rubber to achieve the desired level of elasticity. Continuous Vulcanization curingprocess is most common process used for variety of application. In the process Continuous Vulcanization curing rubber and accelerator is put under high temperature and pressure, this mixture is passed through the continuous heating line during the process, some of C-...
3 comments
Read more

Organic Food and its increasing consumer demand

Organic Food Processing  is where organic raw materials are processed into food and drink. The organics standard of food processing is to protect the food constituents so that organic ingredients are used, and encourage the avoidance of unnecessary chemical or physical. Organic labeling offers consumers, the confidence that the eatables they consume are produced under controlled organic standards. Organic food should be of high nutritional and high natural quality. With the growing awareness even the governments of various countries have setup a separate body to monitor the whole Organic Processing System, in India that being National Program for Organic Production (NPOP). India is one of the upcoming leading processors in this sector. Some private standards demand that organic food should fulfill the criteria of wholesome nutrition, where processing methods must be seen as relevant tools. Most processing methods have more or less strong influences on product properties. Heat...
Post a Comment
Read more