A-Standard Operating
Procedure
Introduction:
Indexer Testing of GRAY polypropylene Control Resin
This the procedure Dynisco Polymer Test uses to run a control material to check
if the machine is operating properly. It is also used to qualify operators once
trained. It can be used as a starting point for a SOP (standard operating
procedure) to use within your company if one does not already exists.
(MFR about 3.6 g/10 minutes, HIMONT PP, use only LOT # 13891)
This standard operating procedure is to be used to qualify Dynisco Polymer Test
employees in the use of melt indexers. It sets forth the proper operation of the
equipment and specific test procedures and methodology to be used by the
operator. In an effort to make the results as consistent as possible we have
found it necessary to go beyond the standard ASTM D1238 method. Control
limits ± 3 of 3.0% have been obtained using this method. NOTE the A/B
method should always be used for operator training. Only the A/B method
assesses cutting and flag methodology together.
Use 2060 weight.
The Test Procedure for Indexer SQC runs:
Instrument Preparation
Use the standard die. (D=0.0825", L=0.315")
Use the 1/4" flag
Set MTD A Time to 180 sec
All calibrations completed.
All machine oils removed from barrel and machine is LEVEL.
Die Dimension Check. (Go, No-Go)
Die Length Check. (Micrometer, = 8.0 mm or 0.315")
Die Clean Check, Clean if Dirty.
Machine should be on for 20 minutes set to 230C, Temp locked.
Barrel Clean Check, Clean if Dirty while HOT.
Plunger Clean Check, Guide bushing must move freely.
Plunger Tip Clean Check, Clean if Dirty.
Tools Ready (Packer, Die remover, brass brush cleaner)
Flag Nearby.
Fill Funnel Nearby
Connect mini-printer or standard printer to indexer.
Machine program set as shown on attached sheet. (1/4" Flag, Density 0.735 )
Set Operator ID to operator initials and Material ID to GRAY
Series 4000 Melt Indexer Operation Manual A-Standard Operating Procedure
46
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