Mold Maintenance & Repair

OCT 2015

Mold Maintenance & Repair

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October 2015 5 180 degrees and the lower platen rolls out, then tilts 70 degree to either the left or right. This allows workers to ergonomically adjust both platens with the beneft of working on the smaller side. Productivity. Some shops use production molding presses to adjust a mold. This method is not only dangerous, it puts a strain on the adjuster. The reality is that molding machines need to be in production, as shops have targets they are required to meet. If a molding machine is used for mold adjustment, the unplanned downtime will affect production. With a high-preci- sion spotting press, the checking of high-qual- ity molds can be completed quickly. As molds continue to be-come more and more complex (for example, multi-shot molds), a built-in rotational table on a high-precision spotting press allows shops to simulate mold production instead of taking up precious molding machine time. All in one setup, two-shot molds can be tested, adjusted and checked in a safe and sim- ple manner, saving time and money. Accuracy. High-precision spotting presses have high repeatability and accuracy. Trials can be further improved by testing hydraulic slides, auxiliary cylinders and ejectors. A parallelism control system can gauge the upper plate's position to ensure an even stroke. Today, there is a lot of focus on mold accuracy, as many companies cut to net shape and negative stock on their cores and cavities. A parallelism control unit accurately brings the two halves together with precision. This technology features four electronic measurement devices, which con- tinuously check the press' upper plate position and parallelism while comparing it with the lower plate. Encoders are located diagonally in the four external corners of the upper plate with the columns. The measurements are dis- played on a touch panel for the entire stroke. If the preset limit parameters are exceeded, With a high-precision spotting press, the checking of high-quality molds can be completed quickly. CONTRIBUTOR: Flavio Malosio is a mechanical engineer and Josh Kauzlarich is a North American sales manager for Millutensil. For More Information: Millutensil / 586-501-3331 / 810-706-1123 / the stroke's movement is immediately disabled and the error is displayed. Parameters can be exceeded when hydraulic cylinders are not be- ing retracted or tools are being left in the mold (for example, scrapers, grinders, slip gages and hammers). Smaller presses use optic scales to ensure the upper plate's movement is even while the lower platen is locked into position. Ease of use. Spotting operations of a high-precision press are intuitively controlled through a control touch panel that makes press functions clear, straightforward and simple. Ad- ditionally, the diagnostic program immediately reports on the display any anomalies that occur during operation. Each movement of the press is represented by a specifc pictogram. In case of a malfunction, the relevant point is shown on the specifc page for a quick solution. This helps minimize downtime, quickens troubleshooting and reduces service costs, especially after the warranty period.

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