TECHNICAL WINDOW
01/2014

Optimizing production with SIPA’S latest mold refurbishing and conversion services

SIPA has added new refurbishing and conversion services to its total PET preform mold offering. Customers now have new options for optimizing production: they can have some components replaced by new ones in order to improve preform quality (refurbishment), or they can choose to have the mold converted to produce a completely new (and quite often lighter) design of preform. The advantage of mold conversion over buying a brand new mold lies in the lower capital investment involved. The existing mold shoe is reused, and return of investment is faster.

Close to customers

SIPA has organized special teams of professionals in three dedicated service centers to support the growing demand for refurbishing and conversions. The service centers are close to main customer concentrations in Italy (Vittorio Veneto), China (Hangzhou), and the USA (Atlanta), so logistics are simple and turnaround times are short.
An extensive mold audit program supported by experts in the field is already provided by SIPA. This helps customers to assess the state of wear of mold components in their own plant; different options on refurbishing or converting the audited mold can then be proposed. Because SIPA has expertise in injection molding and in stretch-blow molding, creative and sound packaging development programs can be bundled together with mold conversion programs. That means customers can take maximum advantage of their investment.

In-house development and production of molds and hot-runners

The new mold refurbishing and conversion services complement SIPA’s extensive in-house capability to develop and produce high performance molds and hot runners in-house. The hot half of each SIPA mold requires maintenance only after five million cycles, and it is possible to maintain components such as piston, flange O-rings and pin valves without opening the whole mold.
The company’s range of solutions benefits from SIPA’s special focus on reducing energy consumption. With better distribution flow and a higher water temperature (14-15 °C instead of 8 °C), water consumption is minimized and performance in terms of condensation reduction is improved.

The smooth, polished, rounded profiles on SIPA hot runners reduce stress on material, resulting in better preform quality and a reduced acetaldehyde (AA) level. Mold systems also exhibit enhanced cooling performance, resulting in high quality preforms, maximum productivity and reduced production costs.