RTM is a low-pressure molding process, where a mixed resin and catalyst are injected into a closed mold containing a fiber pack or preform . when the resin has cured the mold can be opened and finished component removed.
RTM is a low-pressure molding process, where a mixed resin and catalyst are injected into a closed mold containing a fiber pack or preform . when the resin has cured the mold can be opened and finished component removed.
this is my prsentation of Plastic Process and Processing Parameter in manufacturing process. here discussed moulding process for plastic, plastic injection moulding, machine parts and procedure, material used to making mould and blow moulding process, thermoforming process, vacuum forming process, and application
Blow Molding is defined appropriately and also the process compatible materials are listed. Blow Molding is broadly classified as - extrusion type, injection type, Multilayer type. All three processes are explained appropriately with diagrams and their application is also listed. Since every thing has advantages and disadvantages, so is the case with blow molding. References are also cited correctly. I hope you all find it useful
this is my prsentation of Plastic Process and Processing Parameter in manufacturing process. here discussed moulding process for plastic, plastic injection moulding, machine parts and procedure, material used to making mould and blow moulding process, thermoforming process, vacuum forming process, and application
Blow Molding is defined appropriately and also the process compatible materials are listed. Blow Molding is broadly classified as - extrusion type, injection type, Multilayer type. All three processes are explained appropriately with diagrams and their application is also listed. Since every thing has advantages and disadvantages, so is the case with blow molding. References are also cited correctly. I hope you all find it useful
If you use hollow plastic parts (aka water bottles or any other type of bottles), then you're using products made from blow molding. Read this slideshare to learn more about blow molding!
Plastic manufacturing "forming and shaping plastics"Ayush Mathur
how plastic products are manufactured?
what are the processes involved in manufacturing of these products?
what are the various machine tools used?
what are the various types of plastics and what is resin?
what are the diffrent steps in manufacturing?
Get all these answers in this presentation.
Spandex fabric, is one kind of polyurethane elastic fiber. Because of its excellent elastic, it’s also called elastic fiber. Spandex fabric is widely used in garments and features in long range elasticity.
China plastic injection molding can make your dreams come true at low cost for different injection plastic molds like auto parts mould,car parts mold,car door mould,car bumper mould,automotive parts mold,etc.
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Vicky
Respon Plastic Industrial Co.,Ltd.
Add: NO 509 Wulv Road, Tong’an Industrial Zone, Tong’an, Xiamen, China
Zip Code:361100
Cell: 008615985829163
Email: sales01@rpimoulding.com
Website: www.rpimoulding.com
Skype: rpimoulding
This presentation includes basics of mold design, important aspects of molds and mold design that will be useful for understanding design, material aspects, and theoretical aspects of mold making and mold engineering. ProE mold design module known as Pro/MOLDESIGN is also briefly explained in the slide.
3. Compression Molding
• Charge is placed in cavity of matched
mold in the open position
• Mold is closed by bring the two halves
together
• Pressure is exerted to squeeze the resin
so that it fills the mold cavity
• While under pressure the mold is heated
which cures the resin
– Thermosets
11. Sheet Molding Compound
Compression Molding
• Charge is made up from thermoset
materials
• Charge is rolled flat
• Multiple layers of SMC can be used in a
mold
• Longer fibers than BMC
12. Compression Molding
• Compression molded parts
– Total force needed per part is determined by:
• Projected area of the part (A)
• Required cavity pressure for the resin (PA)
• Pressure factor that accounts for depth (ρ)
• Depth in excess of the minimum amount (de)
F = (A) [(PA) + (ρde)]
13. Compression Molding
• Compression molding machines
– Total force that can be exerted is called:
• Press capacity
• Machine rating
• Machine size
• Rated in Newtons or Tons
– Determined by the area of the hydraulic ram
and the hydraulic pressure in the line
Press Capacity (tons) =
Area of Ram (inches2
) X Hydraulic Pressure (psi)
2000 (pounds/ton)
15. Compression Molding vs
Injection Molding
Compression Molding Injection Molding
Cooled mold
Thermoplastic material
Short cycle time (seconds)
Can reprocess flash and waste parts
High part complexity
Undercuts are possible
Uses sprue and runners
Some reinforcement material possible,
must be short (whisker length)
Heated mold
Thermoset material
Long cycle time (minutes)
Can’t recycle flash or waste parts
Low part complexity
No undercuts
No sprue or runners
Reinforcement material can be long
(inches)
16. Transfer Molding
• Mixed resin is placed in the transfer
chamber
• Resin is heated to liquid state
• Plunger presses liquid resin through sprue
and runner system to mold cavities
• Mold is heated
• After resin is cured, parts are removed
18. Product Considerations
• Practically all thermosets can be compression or
transfer molded
– Liquids
– Pastes
• Liquid resin with filler
– Doughs
• Pastes with reinforcement
– Granules
• B-staged resin (phenolics)
– Preforms
• Granules pressed into a pre-measured shape for easier
handling
19. Cold Forming, Sintering and Ram
Extrusion
• Used where heat processing is
difficult or impossible
• High pressures
• Lower temperatures
