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5 Levels Of Plastic Mold Maintenance- 4.General Maintenance
Sep 19, 2018

Only competently trained tool room technicians should perform this maintenance
All plates are separated and their faces cleaned. Caution: Highly polished surfaces should not be cleaned with brushes or rags. Use only uncontaminated facial tissues or cotton balls. Loosen dirt by spraying cleaning fluid into cavity and wipe clean with clean cotton balls. Do not touch with fingers, dust on fingertips may scratch a polished surface. Be careful when blowing a cavity out, there may be dust or rust in the air lines which may damage the polished cavity.
All components are checked for wear. Any excessive wear is noted and a determination is made to repair, replace or continue to use
All rough areas outside the cavity detail area are to be worked out. Any area inside the cavity detail area with dings, dents or other signs of wear or abuse should be considered critical and should be carefully analyzed before replacements or repairs are commenced
All moving parts are to be lubricated if required. Use lubricant sparingly on all moving parts which make contact with plastic parts Vents should be checked for depth, width and land as compared to the tool drawing specifications. This data should be recorded on the check list and a determination made to repair if required. They should also be checked for corrosion and vent burns(Better venting may be required)
“O” rings, seals and gaskets should be checked for integrity
All water lines are to be pressure tested for leaks and recertified for flow capacity.Water lines that have built up scale and are restricted should be pressure cleaned with a descaling agent.
The ejector system is to be examined for proper alignment. If the ejector pin holes have become egg shaped it must be determined if they should be redrilled and bored to a larger size and the existing pins replaced with over size pins
Broken return springs, replating or retexturing as a result of the material eroding the mold surface, replacement of gates or gate inserts, new runner blocks etc. must be analyzed and determined. Replace all springs after 50,000 cycles 100,000 cycles or every 10 production runs