Care maintenance and storage of molds

Slide 1

Care, Maintenance and Storage of moldFahad Ali 14-NTU-1008Tosseq Haider14-NTU-1010Abuzar Ahmad 14-NTU-1039Muhammad Arslan14-NTU-1040

Department Of Polymer EngineeringNational Textile University

National Textile University

1

National Textile University ContentsPolymer EngineeringCare, Maintenance and storage of molds 1Purpose of Mold MaintenanceMaintenance Determined factorDifferent levels of care/maintenancePreservationInspectionMaintenanceMajor MaintenanceStorageTypesModelsReferences

2

Purpose of Mold Maintenance:Regular mold maintenance can help your mold to last longer, to run with less interruptions, and will save you time, money, and frustration in the long run.

National Textile University Polymer EngineeringCare, Maintenance and storage of molds 2


Polymer EngineeringCare, Maintenance and storage of molds 3





Maintenance determined factorsThe amount and frequency of maintenance is determined by several factors:Mold MaterialPart materialMold complexity



Different levels of care/maintenance:Preventative:Every day, and every time the mold is pulled from production or put back into productionInspection:Every 20,000 cycles (or every 10 days of production)Maintenance:Every 100,000 cycles (or every 10 production runs)Major Maintenance:Every 250,000 cycles (or half the anticipated life time volume)



1. Preventative MeasuresSimple Preventive Maintenance greatly improves the life of your mold. At the end ofeveryshift while the mold is still in the press.Procedure:Before the mold is removed from the press the mold should be returned to room temperature.It is critical that no water be trapped inside mold.The parting surfaces, core, and cavity should begentlycleaned with a mild,cleansolvent and soft,cleantowels to remove any residual dirt and grime.The ejector system should be moved fully forward, then spray both mold halves with light rust preventive lubricant.



CAUTION:Highly polished mold surfaces should NOT be wiped with a towel. Instead spray these surfaces with solvent and blow off with clean, filtered, compressed air to remove the majority of dirt and residue.Polymer EngineeringCare, Maintenance and storage of molds 9


Continue

2. Inspection

This kind of maintenance should be performed by a lead operator or an experienced person in your tool room after about 20,000 cycles, after 10 production days, or at the end of a production run.




Polymer EngineeringCare, Maintenance and storage of molds 11Continue

Inspect the tool and look for minor damage or if any "touchup" work is required. Any missing components or blocked off cavities should be noted.The mold should be washed all over with mild, clean solvent to remove the varnish and build up from the molding process.The vents should be checked for depth around the cavity face.Bent, worn or broken ejector pins should be noted and the mold should be removed from production and the pins replaced.


Polymer EngineeringCare, Maintenance and storage of molds 12Continue



3. MaintenanceThis level of maintenance should only be performed by skilled Mold makers.



All water lines are to be pressure tested for leaks and for flow capacity.The ejector system should be examined for proper alignment.Guided Ejection bushing should be checked for wear and any broken return springs should be replaced.Determine if Re-plating or Resurfacing is necessaryDetermine if Replacement/Re-sizing of gates or gate inserts, new runner blocks etc. are necessary.Replace all springs after 50,000 cycles.Polymer EngineeringCare, Maintenance and storage of molds 15


Continue



All plates are separated and their faces cleaned.All moving parts are to be lubricated. Use lubricant sparingly on all moving parts which make contact with plastic parts.Vents should be checked for depth, width and land and a determination made if repair is needed. Maintaining good venting prevents fill problems, excessive fill pressures, material "burning", etc. They should also be checked for corrosion and vent burns to see if additional venting may be required.Polymer EngineeringCare, Maintenance and storage of molds 17


Continue

Major Maintenance Tools




Polymer EngineeringCare, Maintenance and storage of molds 19Rubber or hard plastic mallet and a light weight machinists hammer (Ball Peen).Hex wrenches setsCleaning tank, withcleancleaning solvent.CleantowelsCompressed Air, filtered, with standard shop air pressure.A set of polishing stones (fine), to remove burrs or scratches on mold inserts.Be careful to protect the cavity surface.Duct tape: Used to protect all critical corners and edges on cavities and cores.

Continue

Storage of Mold

Mold storage racks allow for safe and efficient organization of molds and optimize floor space. Any configuration of cells and capacities can be manufactured for your environment. These are the highest quality injection mold and die storage racks you can buy with structural steel shelf carriages and automatic safety interlocks that lock in all other shelves when one shelf is extended.





Manual Racks: Load capacity per shelf from 300 to 3,000 lbs., shelf widths up to 96", shelf depths up to 60" and rack heights up to 120".

Pneumatic Racks: Load capacity per shelf up to 20,000 lbs., shelf widths up to 120", shelf depths up to 72" and rack heights up to 144".



Types

ModelsHere are Different types of racks we are used.IM1: Roll-out shelving racks for injection molds and dies provide easy accessibility and identification of multiple molds. Automatic safety interlock system for only one shelf extending at a time comes standard. Includes 100% Shelf Extension.



IMC1: Injection mold roll-out shelving racks are able to store large quantities of large and small dies. Rack tops may be reinforced to store heavier molds. Includes 100% Shelf Extension, Reinforced Top



IM2: Reinforced rack tops provide an economical way to store your heaviest tools with rack top capacities up 20,000 lbs or more.



IM7: This series of roll-out shelving injection mold racks reduced floor space requirements by 70%.



IM4: Roll-out shelving provides easy and safe access to injection molds and dies. Shelves are adjustable on 1" centers to handle your changing inventory of molds.



IM6: High capacity pneumatic roll-out shelving mold and die racks allow you to store your heaviest molds with ease so you can maximize valuable floor space.



Referenceshttp://www.properstorage.com/im3-pneumatic-injection-mold-die-rack.htmlhttp://www.moldmakingtechnology.com/products/mold-maintenance-software-now-in-cloud-platform





Care maintenance and storage of molds

Engineering

Transcript of Care maintenance and storage of molds