1. METAL CASTING ENGINEERING
RESIN PATTERN MAKING
METAL CASTING ENGINEERING
CLASS XII/ SEMESTER 5 AND 6
ELEMENTARY COMPETENCY 2

2. COMPETENCY ATTAINMENT DIAGRAM
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3. ELEMENTARY COMPETENCY OF RPM
Resin Pattern Making
1. Inspects preparation of pattern and core
2. Makes mold, pattern, auxiliaries and others
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4. 2. Makes Mold, Pattern, Auxiliaries and Others
Purpose of Learning:
Student can make mould to make resin pattern
with form and measure according to specification
Student can investigate and repairs resin pattern to process
moulding with correct method and position
Student can do process finishing and machining
to surface and done by end according to specification
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5. Rule Makes Pattern
Pattern must easy to be released from mould, surface of split-ups is laboured by one areas only
Location of core must easy and must be determined accurately
Channel system must be perfection to get optimum liquid metal stream
Too much surface disjointed will cause longer molding time as a result pattern making becomes expensive
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6. Kinds of Pattern 1. Single Pattern
Form, principal looks like the original
For amounts a few
Cheap and simplest pattern
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7. 2. Cleft Pattern For Medium amounts Quicker making
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8. Only one plates with 2 different side
3. Couple Plate Pattern
For infinitude
Only one plates with 2 different side
Workmanship of rotation printing;mould
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9. There is 2 object each for coupe and drag
4. Coupe Pattern and Drag
There is 2 object each for coupe and drag
Workmanship of mould pararel able, by 2 people / more
For amounts many
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10. More complex storage and treatment
5. Free Part Pattern
Expense of high making
For complicated form
More complex storage and treatment
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11. 6. Sweep Pattern
For rotation object
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12. Kinds Of Addition For PATTERN & CORE
Tolerance / Allowance
Most all liquid materials, the volume will decrease when freezing. ( except water).
Kinds Of Addition For PATTERN & CORE
Shrinkage allowance
Repeal allowance
Finish allowance
Distortion allowance
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13. Depends on material type which will be cast / poured
Shrinkage Allowance:
Depends on material type which will be cast / poured
Repeal Allowance:
Dip / taper that work substance result of cast easy to be released from mold
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14. Distortion Allowance:
Finish Allowance:
Addition of scale for external side and deep, for machinery workmanship
Distortion Allowance:
To anticipate deformation when freezing, because happened strain in at angle or special form, for example form : U, V, etc.
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15. Suaian = Tambahan
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16. Teknologi dan Rekayasa

17. Shrinkage Allowances
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18. Finish Allowances For Cast Iron
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19. Finish Allowances For Cast Steel
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20. Finish Allowances For Nonferrous Alloys
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21. Making Mould For Resin Pattern
This mould make by wood, metal or other material
Mould must be made according to casting plan drawing
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22. Making Mould For Resin Pattern
Allows for split-ups surface, core palm to place core, and possibility that pattern with separate form or couple plate pattern
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23. Making Mould For Resin Pattern
Resin Pattern mould can be made from rubber silicon, advantage :
1. Flexed
2. Form according to the original
3. Small shrinkage
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24. Resin Pouring
To facilitate repeal of resin pattern from mould, gives glaze/ material coating
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25. Resin Pouring Resin pouring is done by paying attention:
1. Snare of air
2. Hardening time
3. Resin volume
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26. Resin Pouring
After hard, resin can be dissociated from mould carefully
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27. Inspection And Repair of Resin Pattern
Inspection with eyesight done to pattern, that is :
Inspection of form
Inspection of surface
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28. Inspection of Form Inspection of form by using casting plan drawing :
Face view, and beside from drawing is placed by beside pattern at the same direction
Checked with turning around and compares
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29. Inspection of Surface
Inspection surface is more point in defects, like:
Pore
Crack
Broken
Air trapped during hardness
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30. Repair and Patching
Repair at surface of resin pattern can be done with patching parts of pattern that is less good
Patching usually applies common plastic, putty used to patch carbody and many commercialized
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31. Way of Patching :
Sander beforehand part of cupola which will be repaired
Plastics putty mixture create with hardener sufficiently
Dabs or closes at part of cupola which will be patched
Lets the patch runs dry
After running dry neatens and refines the putty patch with sand paper
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32. Machining and Finishing Resin Pattern
Solution of machining can apply machines produce and also operation machine grasps
Purpose of this process is to obtain surface end result desired and get pattern measure according to moulding plan picture
After resin pattern is processed by end, continued with inspection of measure with procedure
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33. Kinds of Machine Production
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34. Kinds of Machine Production
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35. “To prevent the entry of dust as result of sand paper working”
Working Safety :
Applies :
Eye protection
Ear protection
Nose protection
“To prevent the entry of dust as result of sand paper working”
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36. THANK YOU CREATED BY : HERU KARYANA, SPd SMKN 2 KLATEN
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