Downloaded 662 times
Uploaded bysangeetha baskaran
Composite manufacturing processes
The document outlines various composite manufacturing processes, including their advantages and disadvantages, such as hand lay-up, pre-preg forming, and vacuum bagging. It highlights key production methods like filament winding, pultrusion, and resin transfer molding, detailing their applicability and efficiency. Each process presents unique benefits, such as low costs and high productivity, but also faces challenges like inconsistency and high equipment expenses.
More Related Content
Similar to Composite manufacturing processes
Composite manufacturing processes
- 1.
- 2. Composite Manufacturing Processes Thermosetcomposites Short fiber reinforced Continuous fiber reinforced Prepreg resin transfer Thermoplastic composites Commingle Impregnated
- 3. Composite Manufacturing Processes Processes: HandLay-up Pre-preg forming Pressure molding Vacuum bagging Filament winding
- 4. Composite Manufacturing Processes Processes: Pultrusion Spraymethod Sheet molding Bulk molding Resin transfer molding
- 5.
- 6. Hand lay-up Advantages: low costtools versatile: wide range of products Disadvantages: time consuming easy to form air bubbles and disorientation of fibers inconsistency
- 7. Prepreg forming Advantages: orientation offibers can be changed consistent high productivity Disadvantages: continuous process needs more customers limited shelf life delamination
- 8. Pressure molding Advantages: wide rangeof shapes integrate parts consistency structural stability relatively simple Disadvantages: high cost of machine time consuming to heat up, cool down and curing expensive molds (strong materials required) no intricate parts large volume of products
- 9.
- 10. Vacuum bagging Advantages: simple design anyfiber/matrix combination ok with cheap mold material better quality for the cost Disadvantages: cannot be heated up too much breeder clothe has to be replaced frequently low pressure (760 mm Hg the most) slowest speed inconsistency
- 11.
- 12. Filament winding products Compressedair tanks High-pressure CO2 tanks and bottles Water softener systems Rescue air tanks Sail boat masts Compressed Natural Gas tanks Defense/Aerospace systems Lightpoles
- 13. Filament winding Advantages: using existingtextile processes. quick, easy to handle package. parts can have huge size. Disadvantages: spinning speed is limited due to resin penetration and splashing, traveler speed and yarn breakage. curing by heat is not easy to apply. shape of the products limited (only cylindrical possible).
- 14.
- 15. Pultrusion Advantages: Automated processes. High speed. Versatilecross-sectional shape. Continuous reinforcement. Disadvantages: Die can be easily messed up. Expensive die. Mainly thermoset matrix.
- 16.
- 17. Spray method Advantages: Continuous process Anymaterials can be used as mold. Error can be corrected by re-spraying. Disadvantages: Slow. inconsistency. No control of fiber orientation. Only one side finished. Environmental unfriendly.
- 18.
- 19. Sheet molding Advantages High productivitythus inexpensive consistency Disadvantages low volume fraction. Only board can be made.
- 20.
- 21. Bulk molding Advantages Highest volumefraction for short fiber reinforced composites (50%) Good mechanical properties Finish can be applied Inserts and attachments possible Disadvantages High temperature and high pressure Random fiber orientation Cannot be used for intricate parts Staple fibers only.
- 22.
- 23. Resin transfer molding Advantages Components will have good surface finish on both sides Selective reinforcement and accurate fiber management is achievable Ability to build-in fiber volume fraction loadings up to 65% Uniformity of thickness and fiber loading, uniform shrinkage Inserts may be incorporated into moldings Tooling costs comparatively low Uses only low pressure injection Low volatile emission during processing Ability to produce near net shape moldings Process can be automated, resulting in higher production rates Ability to mould complex structural and hollow shapes Low resultant voids Ability to achieve from 0.5mm to 90mm laminate thickness Disadvantages waste some material (spill) curing time long hard for intricate parts