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CNCEN Chillers for injection molding machine

2014/7/1      view:

CNCEN Refrigeration Equipment  Manufacture Co.,Ltd


Injection Molding Equipment :

Need injection molding equipment from chillers to cooling towers? If you're worried about your process equipment breaking down and costing you money for lost production and costly repairs, our chillers, pump tank stations, pumping systems and cooling towers are the answer you're looking for. Until the injection molding industry completely moves from using hydraulic to electric systems, a long lasting efficient cooling system is an investment you can't avoid. We manufacture complete cooling systems for cooling both your hydraulics and molded products.

What is Injection Molding?

Injection molding is a process in which a plastic resin is heated until it becomes soft enough to force into a closed mold, at which point the resin cools to solidify and form a product. Injection molding is used for making parts from primarily thermoplastic resins. The process that takes place is a lot like the filling of a jelly donut. A hypodermic style cylinder and nozzle inject the heated resin into an opening created in a closed container or mold. The resin is allowed to harden again, the finished part is ejected, and the process is repeated as often as necessary to produce the total number of parts required. Injection molding is used for manufacturing a variety of parts, from the smallest component to entire body panels of cars. It is the most common method of making plastic products, from bottles to automotive parts.

The Injection Molding Process :

Invented in 1868 by John Wesley Hyatt for making celluloid billiard balls, the first injection molding machine functioned a lot like a large hypodermic needle. It was not until 1946 that this plunger design was replaced by James Hendry with the first screw or auger designed injection molding machine. Today, while most screw molding machines are still driven by hydraulic systems, they are slowly being replaced by electricity driven machines. While these hydraulic systems work, and even as the machine is idling, the temperature of the system's hydraulic fluid rises. This temperature rise is caused by the friction created by the oil flowing through the machine and by the compressive force of the oil when used to provide pressure. For these systems to operate as efficiently as possible, the temperatuer of the hydraulic oil must be controlled.

The Cooling Process :

A major component of the injection molding process is cool water for cooling down the oil in these hydraulic systems and even the molded parts themselves. If it's too cool, the oil will thicken causing the valves to operate sluggishly or not at all. If the oil is too hot, it will degrade into a thin liquid filled with chunks of additive materials that broke down because of the heat. These clog passageways and interrupt operation of the hydraulic mechanisms. The temperature of the oil is controlled by a heat exchanger inside a chiller. The chiller circulates the oil over copper (or other highly conductive metal) tubing that weaves back and forth inside the heat exchanger. The tubing is connected to a water inlet and the temperature of the oil is monitored. When the oil is cold, the chiller does not circulate the water in the tubes. The water absorbs heat from the oil as the oil warms up while flowing through the hydraulic system. When the oil becomes too hot, the heat exchanger opens the water inlet valve to allow water to circulate through the copper tubing. The circulating water draws heat from the oil until the oil temperature drops to the proper level. The system then cycles the water off until needed again. In this way, the heat exchanger can maintain the proper oil temperature at approximately 120° F, 5° F (49° C, 2.7° C)

In addition to our CNCEN chillers, we manufacture pumping stations for bringing water to the process and back. These chiller pumps are responsible for establishing a reliable flow of cool water at high pressures and at a varying flow. Our tower pumps pump water to the chiller or tower which require a constant flow of water at a lower pressure.

Chiller and Tower Water Tank Sets :

Our complete line of injection molding equipment includes pump tank stations and pumping systems for transporting liquids, i.e., water or a water-glycol solution through chilling systems for cooling the injection molding machines. We supply both chiller and tower water tank sets for process cooling. We offer 7 standard models, each with double pumps, baffled tank and lid. The two pump system has one pump dedicated to the chiller or chillers to maintain constant water flow required by the chillers to ensure maximum efficiency and safe operation. The second pump is dedicated to the process to supply higher flows than the chillers would normally allow, and higher water pressure required by the varying process equipment demand.

Chilling Systems and Cooling Towers :

As our signature product, chillers and cooling towers for injection molding are what we do the best. Our engineering expertise not only makes our injection molding equipment easy to inspect, maintain and repair, they are easily the most energy efficient and long lasting equipment on the market. Our cooling systems are ingenuously designed and include oversized condensers and stainless steel brazed plate evaporators. Not only does this mean much longer lasting compressors, but a much more efficient system. Add a hot gas by-pass, a water flow switch, a freeze thermostatnon-rusting water piping, and you have the perfect fit for anyone who has to worry about cooling reliability and cost effectiveness. All our models can be delivered immediately from stock or 2 to 4 weeks if not in stock.

Finding a reliable cooling system for your injection molding process is difficult when there are so many low cost imported molding equipment overflowing the market. While it is tempting to think that you are saving money, a low price is often a compromise on reliability and quality. Low cost injection molding equipment may appear cheaper, nicely designed, 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 cooling system for your injection molding process that is durable, reliable, easy to install and service, then you've come to the right place.