The temperature measuring thermocouple is used as the temperature measuring element, and the temperature measuring millivoltmeter is used as the temperature control device to command the on-off of the electric current of the barrel and the die, and selectively fix the temperature of each section of the barrel and the die.– carrier tape forming machine

The electric heating ring of the material barrel is generally divided into two sections, three sections or four sections. The ammeter on the electrical cabinet shows the current of each section of electric heating coil respectively. The reading of the ammeter is relatively fixed. If the reading of the ammeter is found to be low for a long time during operation, the electric heating ring may have failed, or the wire may have poor contact, or the electric heating wire may be oxidized and thin, or a electric heating ring may be burned, which will increase the resistance value of the parallel circuit and reduce the current.— carrier tape forming machine

When the ammeter has a certain reading, you can also simply scratch the outer wall of the electric heating ring one by one with a plastic strip to see whether the strip is melted or not to judge whether a certain electric heating ring is energized or burned.— carrier tape forming machine