Troubleshooting

  • FLASHING FINNING

    EXCEEDED RECOMMENDED WATER / POWDER RATIO

    REDUCE WATER TO WITHIN RECOMMEND RANGE (38 – 40/100)
    NOT MIXED LONG ENOUGH

    HAND MIXING – MIX 3 MIN. MECHANICAL – MIX 3 - 4 MIN.
    METAL AND, OR FLASK TEMP TOO HOT

    REDUCE METAL AND, OR FLASK TEMPERATURES
    CURE TIME NOT LONG ENOUGH AFTER SET

    LEAVE FLASK UNDISTURBED 1 – 2 HOURS BEFORE STARTING BURNOUT
    INVESTMENT PROCESSED PAST AVAILABLE WORKING TIME

    PROCESS NOT LONGER THAN 8 – 9 MIN.
    MOLD HEATED TOO QUICKLY WATER / POWDER RATIO

    SLOW DOWN RATE OF TEMPERATURE RISE
    EXPIRED INVESTMENT IMPROPER STORAGE

    USE FRESH POWDER WITHIN RECOMMEND STORE IN COOL, DRY AREA

  • AIR BUBBLES

    WATER RATIO TOO LOW
    ADJUST W/P RATIO TO: 38/100- VACUUM MIXING -40/100- HAND, MECHANICAL MIXING
     
    NOT MIXED LONG ENOUGH WATER / POWDER RATIO
    DO NOT MIX LESS THAN 2.5 - 3 MINUTES
     
    INVESTING CYCLE TOO LONG
    FOLLOW INSTRUCTIONS DO NOT PROCESS PAST 9 MINUTES
     

  • NON-FILLS, Cont.NON-FILLS, Cont.

    PATTERNS TOO CLOSE TO POUR BUTTON
    LEAVE MORE SPACE BETWEEN BOTTOM ROW AND BUTTON
     
    FLASK TEMP. TOO HIGH
    REDUCE FLASK TEMPERATURE
     
    SPRUED IMPROPERLY
    SPRUE TO THICKER SECTION OF DESIGN
     
    SPRUING TOO SMALL
    SPRUE TO HEAVIEST SECTION OF DESIGN. USE LARGER GATE
     

  • SHRINKAGE POROSITY

    PATTERNS TOO CLOSE TO POUR BUTTON
    LEAVE MORE SPACE BETWEEN BOTTOM ROW AND BUTTON
     
    FLASK TEMP. TOO HIGH
    REDUCE FLASK TEMPERATURE
     
    SPRUED IMPROPERLY
    SPRUE TO THICKER SECTION OF DESIGN
     
    SPRUING TOO SMALL
    SPRUE TO HEAVIEST SECTION OF DESIGN. USE LARGER GATE
     

  • GAS POROSITY

    CONTAMINATED METAL
    CLEAN METAL OF INVESTMENT, ETC.
     
    FLASK TEMP. TOO HOT
    REDUCE FLASK TEMPERATURE
     
    INCOMPLETE BURNOUT
    HOLD LONGER AT PEAK TEMP.
     
    METAL REUSED TOO MANY TIMES
    USE NEW, UNUSED METAL, OR MIX NEW METAL WITH REMELT
     

  • INVESTMENT RESIDUE STICKS TO CASTINGS

    METAL OVERHEATED
    REDUCE METAL TEMPERATURE
     

  • CASTING INCLUSIONS

    CRUCIBLE OLD, DETERIORATED METAL OXIDES
    REPLACE WITH NEW CRUCIBLE REFINE METAL
     

  • CASTING INCLUSIONS, Cont.

    SHARP CORNERS BREAKING OFF
    INCREASE MOLD STRENGTH MODIFY DESIGN
     

  • ROUGH CASTING SURFACE

    TOO MUCH WATER USED TO MIX
    DO NOT EXCEED 40% WATER FOR MIXING.
     


    ROUGH MODEL SURFACE
    POLISH MASTER MODEL & REMAKE RUBBER MOLD
     
    TOO MUCH SILICONE. OR TALC MOLD RELEASE
    CLEAN MOLD AND REDUCE SILICONE, OR TALC USED
     
    FLASK TOO HOT
    REDUCE FLASK TEMP.
     
    METAL TOO HOT
    REDUCE METAL TEMP.
     
    EXCESS STEAM DE-WAX
    REDUCE TIME IN STEAM TO LESS THAN ONE HOUR
     
    FLASK NOT CURED LONG ENOUGH BEFORE BURNOUT
    CURE MOLD A MINIMUM OF 1- 2 HOURS
     

  • DARK, OXIDISED CASTINGS

    PEAK BURNOUT TEMP. EXCEEDED
    DO NOT EXCEED 750C.
     


    METAL SPENT, REUSED TOO MANY TIMES
    REFINE, USE FRESH METAL
     
    METAL OVERHEATED
    USE CORRECT TEMP. FOR CASTING