Mold Sensor Prevents Accidental Closure in Injection Molds
When tied to the machine control, Burger & Brown Engineering’s Global Thinswitch can help prevent mold crashes due to premature mold close, saving the user downtime and expensive mold repairs.
Source | Burger & Brown Engineering
Burger & Brown Engineering’s Global Thinswitch is specially engineered for use in injection molds with 3-mm and 4-mm rest buttons to verify ejector plate return. When tied to the machine control, the Global Thinswitch can help prevent mold crashes due to premature mold close, saving the user downtime and expensive mold repairs.
The Thinswitch helps prevent accidental closure in by in injection molds with 3-mm and 4-mm rest buttons, and where occasional water or oil spray is present. The switch features a spring clip mounting option which makes it easy to remove from the mold without using tools, thereby preventing accidental wire damage in storage.
This model may be mounted directly to the mold using integral mounting holes or by using the spring clip. The bracket enables molders to slide the Thinswitch into place without disassembling the mold or using screws to hold the switch in place. Spacers placed under the switch accommodate different rest button heights.
Switch mounting is accomplished using integral mounting holes, or using the spring clip bracket which enables the sensor to slide into place from the edge of the mold base. Housing thickness is 3 mm, and each switch is shipped with a 1-mm thick spacer to accommodate 4-mm rest button thickness.
The operating point is adjustable between 0.2 and 1mm above the top of the switch housing. Special mold base pocket machining is not required. A polyurethane dome and wire seal protect the internal switch mechanism from water or grease contamination, providing a longer switch life. The switch is compliant with CE directive IEC 60730-1, and suitable for use in environments up to 80°C. Switching action is SPST with gold plated internal contacts for reliable operation.
Wire leads are 28-gauge stranded, 2-conductor shielded cable, 2 m long. Ends are stripped and tinned, ready for installation. According to the company, product testing has exceeded 14 million cycles without failure.
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