Pultrusion or Vacuum injection moulding?
Pultrusion or Vacuum injection moulding?
(OP)
Which method can give better results in respect of rigidity, when we manufacture flat sheets/bars using UD carbon fibre?
What is the best resin/fabric weight ratio to achieve this?
Thanks in advance
What is the best resin/fabric weight ratio to achieve this?
Thanks in advance





RE: Pultrusion or Vacuum injection moulding?
RE: Pultrusion or Vacuum injection moulding?
Pultrusion with unidirectional fibres can give 70% fibre volume fraction, which will give the greatest rigidity (stiffness) for a given bar size with deformation along the bar axis (bending or axial). Pultrusion isn't really that well suited to producing sheets and is a bit limited for non-unidirectional fibre direction options.
Vacuum injection (VARTM, etc.) is more suited to somewhat lower fibre volumes (often 50-55%) and large sheet areas, with preference usually given to cloth and non-crimp fabric reinforcements, though small fitting-like components can also be infused economically.
The two manufacturing methods are sufficiently different that usually they are not considered alternatives for a given form of structure.
An exception might be beams of constant section such as those sometimes used in truck beds.
What are you making?
RE: Pultrusion or Vacuum injection moulding?
i am producing UD carbon fibre bars.
According to your indications, pultrusion is best for my case, and this is what i'll do.
RE: Pultrusion or Vacuum injection moulding?
RE: Pultrusion or Vacuum injection moulding?
RE: Pultrusion or Vacuum injection moulding?
Can this be done?