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CNCEN Chillers for the Plastics Industry

2014/7/1      view:

CNCEN Refrigeration Equipment  Manufacture Co.,Ltd




Plastic Processing Equipment : 

Looking for reliable plastic process equipment? Making plastic products is a three phase process: heating, molding and cooling. Before they are processed, thermoplastic materials or resins are usually in a solid form of some kind, i.e., as a pellet, granulate, film or sheet. In order to mold them into marketable products, they must first be heated to their melting temperature. When soft and melted, they can then be manipulated (injection molded, blow molded, extruded, etc) into a new shape. When resins are molded into their new shape, they have to be properly cooled to become solid. To accomplish all of this, a lot of heat energy has to be extracted from the resin, the plastic process equipment and any other machinery involved in the molding process.

At CNCEN Chillers, we are concerned with the final stage of the plastic process: cooling. Depending on how fast your process is, the environment in which the process takes place, and the quality of plastic resin being molded or extruded, the cooling process can take two forms.

  1. In larger plastics processing plants, there is usually a centralized process water cooling or chilling system. Pipes circulate the cooling water through the plastics machinery and subsequently the warmer return water back to the central cooling unit. These centralized chilling and cooling systems can either be refrigerant process water chillers or the forced air type, more commonly known as air blast coolers, depending upon the temperature of water required.
  2. A smaller processing plants, on the other hand, might use portable chillers that are located next to a plastics processing machine to provide individual machine cooling.

According to the laws of thermodynamics, heat energy can only travel from a hotter object to a colder object. Heat cannot travel in the reverse direction, i.e. from a cold object to a hot object. All process cooling chillers are based on this simple principal of heat transfer.

What Types Of Plastics Processes need Water Cooling or Chilling?

Most molding technologies require cooling for the plastic process equipment, i.e., injection molding, sheet extrusion, blow molding and film blow molding. They also require cooling for molding equipment. Only the sheet extrusion and film blow molding processes require cooling for the products themselves.

Cooling Plastics Processing Equipment :

Most plastics processing machines use hydraulic systems to control the machines moving parts. The hydraulic pump motor becomes hot when operating under load and heat from the motor will transfer to the oil via the motor shaft and pump casing. Further heating of the oil will result from the friction caused by the flow of the hydraulic oil through the valves, pipes and cylinders. All hydraulic oils have advisory maximum operating temperatures, so hydraulic oil cooling is one of the functions of plastics process cooling systems to ensure that the hydraulic oil is maintained at its optimum working temperature.

Cooling Plastics Products :

The extrusion process has a water bath or spray system in which the hot plastic being extruded is immediately immersed. The bath or spray is connected to a chilled water system which creates the necessary heat transfer to solidify the plastic. In the plastic blown film process, the air blown into the bubble can be chilled by passing it across a finned heat exchanger, which is supplied with chilled water. The air cooling or chilling system can have the effect of improving the clarity and quality of the film and speed at which it can be produced.

If you're worried about your chiller breaking down and costing you money for lost production and costly repairs, our chillers are the answer you're looking for. Finding a reliable chiller for your molding process is difficult when there are so many low cost imported chillers flooding the market. While it is tempting to think that you are saving money, a low price is often a compromise on reliability and quality. A low cost chiller might appear to be cheaper, prettier to look at, with a nice outer shell or cover, but most are not built to last, are unreliable, easily damaged, and hard to fix. Don't settle for less than the best. If you're looking for a quality designed chiller that is durable, reliable, easy to install and service, then you've come to the right place.