INNOVATION | LIQUID SILICONE RUBBER
LSR processing equipment than on regular thermoplastic processing machines, communications between different components are particularly important. Equipment companies are increasingly turning to OPC UA (Open Platform
Communication Unified Architecture)
Above: KraussMaffei’s SilcoSet
technology is designed for LSR injection moulding
to simplify data collection and control across diverse components in a system. Elmet for example presented an OPC-UA interface for its Top 5000 P LSR dosing system at Fakuma 2018. It says this enables the system to communicate in real time with the injection moulding machine. At Arburg’s 2019 Technology Days in March, two LSR applications illustrated OPC UA solutions that it offers for peripheral equipment. An Arburg electric Allrounder 370 A produced
flexible LSR name tags which were then personal- ised using a laser, while an electric Allrounder 470 A produced flexible baking tins. The LSR dosing systems – one from Reinhardt Technik, the other
from 2KM – were each integrated into the Selogica control system. This enabled relevant input param- eters, exchange of material pressure, colour and additive settings as well as remaining run times all to be communicated transparently and conveniently. Also highlighting the advantages brought by the
use of OPC-UA communications in LSR moulding is Wittmann Battenfeld. It says it has made several enhancements to its LSR injection moulding equipment, including integration of the LSR dosing pump into the machine’s control system via OPC-UA communication. Any commonly available LSR dosing and pumping system can now be connected to the machine controller via an OPC-UA interface, the company says. The company has also revised the design of the
screw, which now has a new seal at the end of the shaft in front of the screw coupling to reduce the risk of silicone leaking out towards the screw drive. The check valve now combines a larger flow cross-sec- tion with a faster and more precise closing mecha- nism. Wittmann Battenfeld says this has led to a significant improvement in shot weight precision. At this year‘s Chinaplas in Guangzhou in May, the company plans to demonstrate an LSR applica-
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