Plasmatreat GmbH has created a process for hybrid injection-moulded parts in conjunction with AKRO-PLASTIC GmbH, the plastic compound manufacturer. This new process means a notable improvement to bonding in hybrid plastic-metal components, and can be woven into series production lines. The Schmersal Group is currently using this groundbreaking Plasma-SealTight® technology process in a pilot application to manufacture its AZM300 solenoid lock. This particular interlock is used on safety doors and features a metal bracket that is incorporated into a plastic actuator. This bracket engages with an interlock cross-head to make sure the safety doors securely closed.
A firm bond is critical during the joining process to ensure production of a high-quality, resistant joint between the unlike materials metal and plastic. Interfaces without a special seal in a plastic-metal bond present a surface of continuous contact that water, air or other media can infiltrate. The Plasma-SealTight® plasma sealing process created by Plasmatreat and AKRO-PLASTIC provides a totally new approach to developing a highly bonding, media-resistant hybrid joint. In this revolutionary industrial solution, the plastic compound formula, the parameters of the process itself, and the composition of a plasma-polymer seal layer forged under atmospheric pressure were matched to one another in such a way that they would create a durable, media-tight bond.
The AZM 300 is a cutting-edge safety interlock which is now being used in many facets of the industry. AZM 300’s incredible features include a new, patented operating principle with a cross-head and hub. Its advantage lies in the fact that the safety door is pulled into its end position when closed and is securely locked with almost zero clearance. The solenoid interlock operates as an incorporated guard catch, removing the need to fit in a separate catch. An RFID sensor reliably identifies the actuator, providing three different code levels and protection against manipulation.