Close-to-the-cavity cooling and heating
Dynamic Mold Cavity Temperature Control
The name integrat evolution is what the company gwk Gesellschaft Wärme Kältetechnik mbH, Kierspe, Germany, calls its new combination of close-to-the-cavity cooling and heating. Using this process, it is possible to produce molded parts that must satisfy demanding surface appearance requirements, for instance, high-gloss surfaces for automotive components or consumer items as well as thick-walled molded parts for optical applications. A ceramic resistance heater is installed, just below the surface of the cavity and, in combination with cooling channels close to the cavity, ensures fast and energy-efficient temperature changes. Based on control by the injection molding machine, the mold’s surface is heated quickly to so high a temperature that very good filling of the cavity results. Immediately after the filling phase, the system switches to cooling in order to avoid extended cycle times as the result of high temperatures. This process permits very rapid temperature changes in the mold and, compared to conventional variotherm temperature control technology, reduces energy consumption considerably.
For dynamic mold cavity temperature control, gwk relies on the integrat evolution system, which combines various components. The technology behind the integrat 4D is used for locating the temperature control channels in the mold close to the cavity. Energy-saving, individual control of the water flow rate for each cooling channel during the cooling phase is provided by the integrat direct control unit. The new integrat process control module is responsible for communication between and control of the heating and cooling elements. It transmits the process parameters to the injection molding machine’s control system in real-time via the Varan interface developed by KraussMaffei.
gwk Gesellschaft Wärme Kältetechnik mbH
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