Structural foam molding
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Transcript of Structural foam molding
STRUCTURAL FOAM MOLDING
AND SANDWICH MOLDING
INJECTION MOLDINGTo produce the parts by injecting a material.
Performed with metals, , thermoplastic and thermosetting polymer.
STRUCTURAL FOAM MOLDINGlow pressure injection molding inert gas into the melted polymerReduces density and weightIncreases strength
Materials usedThermoplastic material:
•Polycarbonate•ABS•Polyphenylene oxide-PPO•Polybutylene terephthalate
Design Benefits Reduced part weightThick sections up to 5 inchesLower cost toolingChemical and corrosion resistance
Performance BenefitsIncreased strength to weight ratioChemical and corrosive resistanceImproved acoustical and electrical insulation characteristicsCan be recycled and reused.
APPLICATIONS•Tool boxes•Trash cans•Commercial laundry bins•Pallets•Replace wood,concrete,metals,fiberglass
SANDWICH MOULDINGTwo or more polymers are injected one after another through the same gate in one or more cavities.Core and skin material different or same.Also called as co-injection molding
PROCESSINJECTION 1-FORM THE SKIN MATERIAL
INJECTION 2- FORM THE CORE
INJECTON 3-TO SEAL THE GATE AND FINISH THE PART
PROPERTIES OF SKIN MATERIAL
Will be thin Surface structure of the material.Transparent materialPaintable surfaceE.g.: glass, thermoplastics,
thermosets , sheet material , plywood
PROPERTIES OF CORE MATERIAL
Thick but will be lightweight.Low density materialHigh bending stiffness.Recycled material.E.g. :PVC, polyethylene ,polystyrene ,
metal foams.
APPLICATIONS
•Door handles in car industry(strengthening)
•Electronic housings•Decks in ships•In aerospace, making doors in airplane•Antennas
METHODS:Autoclave moldingAdhesive bondingLiquid moldingContinuous lamination Compression molding