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Life Cycle of Essential Wearable Parts on the Working Jaws
The principal working jaws are the heater bar and pressure bar. Whenever there is damage to one of these working jaw components, always check the condition of the other. Wearable parts will continue to fail if the primary cause of the failure is not identified and corrected. This condition can occur when simply not replacing all the damaged parts on both working jaws when necessary. Other reasons for frequent breakdown of wearable parts are the failure of control components in the Impulse Generator, the actuator microswitches mounted on the frame of the machine, misalignment of the working jaws, loose machine fasteners and on rare occasions the pneumatic system.
Under normal/routine working conditions, the wearable parts should give good service for many months. The following list describes the average life cycle associated for each of the essential wearable parts.
1) Top Teflon cover on Heater Bar- Should last for 4 to 6 weeks, the most frequently replaced part due to direct contact with both heating element and sealing material.
2) Bottom Teflon under the Heating Element - Should last for 6 to 12 weeks, wears out due to the effects of residual heat from direct contact with the heating element.
3) Heating Element - Should last for 12 to 24 weeks, or longer. It can fail from the effects of misalignment of the working jaws, improper setting of the heat control dial and incorrect installation.
4) Pressure Bar Teflon cover - Should last 6 to 8 weeks, the second most frequently replaced part due to direct contact with sealing material and effects of residual heat.
5) Silicone Rubber - Should last for a minimum of 12 months. It can fail from the effects of misalignment of the working jaws and when a heating element burns out during a sealing cycle.
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