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

COMPETENCY ATTAINMENT DIAGRAM Teknologi dan Rekayasa

ELEMENTARY COMPETENCY OF RPM Resin Pattern Making 1. Inspects preparation of pattern and core 2. Makes mold, pattern, auxiliaries and others Teknologi dan Rekayasa

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 Teknologi dan Rekayasa

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 Teknologi dan Rekayasa

Kinds of Pattern 1. Single Pattern Form, principal looks like the original For amounts a few Cheap and simplest pattern Teknologi dan Rekayasa

2. Cleft Pattern For Medium amounts Quicker making Teknologi dan Rekayasa

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 Teknologi dan Rekayasa

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 Teknologi dan Rekayasa

More complex storage and treatment 5. Free Part Pattern Expense of high making For complicated form More complex storage and treatment Teknologi dan Rekayasa

6. Sweep Pattern For rotation object Teknologi dan Rekayasa

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 Teknologi dan Rekayasa

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 Teknologi dan Rekayasa

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. Teknologi dan Rekayasa

Suaian = Tambahan Teknologi dan Rekayasa

Teknologi dan Rekayasa

Shrinkage Allowances Teknologi dan Rekayasa

Finish Allowances For Cast Iron Teknologi dan Rekayasa

Finish Allowances For Cast Steel Teknologi dan Rekayasa

Finish Allowances For Nonferrous Alloys Teknologi dan Rekayasa

Making Mould For Resin Pattern This mould make by wood, metal or other material Mould must be made according to casting plan drawing Teknologi dan Rekayasa

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 Teknologi dan Rekayasa

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 Teknologi dan Rekayasa

Resin Pouring To facilitate repeal of resin pattern from mould, gives glaze/ material coating Teknologi dan Rekayasa

Resin Pouring Resin pouring is done by paying attention: 1. Snare of air 2. Hardening time 3. Resin volume Teknologi dan Rekayasa

Resin Pouring After hard, resin can be dissociated from mould carefully Teknologi dan Rekayasa

Inspection And Repair of Resin Pattern Inspection with eyesight done to pattern, that is : Inspection of form Inspection of surface Teknologi dan Rekayasa

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 Teknologi dan Rekayasa

Inspection of Surface Inspection surface is more point in defects, like: Pore Crack Broken Air trapped during hardness Teknologi dan Rekayasa

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 Teknologi dan Rekayasa

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 Teknologi dan Rekayasa

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 Teknologi dan Rekayasa

Kinds of Machine Production Teknologi dan Rekayasa

Kinds of Machine Production Teknologi dan Rekayasa

“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” Teknologi dan Rekayasa

THANK YOU CREATED BY : HERU KARYANA, SPd SMKN 2 KLATEN Teknologi dan Rekayasa