India, Nov. 7 -- Special-machine manufacturer Krott + Heuter has developed a new Type ZKSTA series of machines for hot upsetting of fastener (screw and bolt) heads and pins. The new machine has now passed its trials at a renowned manufacturer of punches and ejector pins. The centrepiece of these machines is a specially developed three-sector star die, which chronologically separates the "Insertion", "Heating-up", "Heading", "Cooling" and "Discharge" operations from each other. This enables the machine to reduce heading cycle times by up to 30 per cent.
Up to now, it has been customary to use dies with two opposing mountings for hot heading of fasteners (screws/bolts), ejector pins for mould-making and perforating pins and needles. A new pi...