Multi-Cavity System Technique for Injection Molding

Rapid advances in process technique and mold design mean that the use of single-cavity molds for the production of molded articles has become quite unusual. The increase in the number of cavities has also been accompanied by an increase in the requirements for successful processing. At the same time, ever-increasing numbers of molded parts are being manufactured with high safety requirements. This conflicting trend can only be resolved by absolute process transparency accomplished by means of systems based on mold cavity pressure. In addition to pressure sensors, the basis of these systems also includes electronic circuitry and software developed for this application. For molds with more than 4 cavities, the use of individual charge amplifiers is no longer feasible due to the unacceptable risk of confusion when connecting sensors. For this reason, multi-channel charge amplifiers with up to 32 sensor connections are used, these being mounted directly on the mold. All sensors in the Type 6829A… multi-cavity systems are provided with Kistler single- wire technology. This makes it easy to connect sensors and at the same time reduces the costs of mold design because bores are used to install cables instead of milled channels. Used in conjunction with the DataFlow software, this provides an efficient system for the optimization, monitoring and documentation of multi-cavity molds.