Ice Lock

thingiverse

Ice-based timed lock: A Secure and Reliable Alternative Freeze the pin in place within a body, and at room temperature, it will take approximately 2-3 hours for the ice to melt sufficiently, releasing the pin. This option is an attractive alternative to constructing an electromechanical timed lock, offering greater reliability as long as one avoids extremely cold environments. Printed with Hatchbox PETG at a temperature of 246C, this lock can withstand forces exceeding 100 pounds with fresh ice inside. PLA also performs well in such applications, whereas ABS prints have been known to shatter due to the expanding ice. If your print is not watertight, try increasing the extrusion multiplier by approximately 15%. The ideal printing settings include an extrusion width of 0.5mm, two wall outlines, a layer height of 0.3mm, and 20% infill.