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So what is the best material for the press plates? We have just installed a 24'x6' hydraulic heated press, with aluminium plates. Anyway, Airtech recommends Tooltec for this application, but we were wondering if there is any alternative. Thanks

What material is used to cover the aluminium plates of a heated press for composites?

We have done many UD sheets in various thickness (0.2-3mm) for a costumer in the past. Tricky, but can be done as soon as you used a lot and effective release agent and be very careful when de moulding.

Thank you all for your advices. The addition of an extra 45°/45° layers should definitely make things better. However, it will increase the cost of the raw materials. But we will definitely consider it. On the other hand and as allcomposites suggested, we will try to infuse a core between the...

We are building small boats (5,50m) using the usual method (hand lay up), CSM fibreglass and polyester resin. We lay up 5 layers of 450gsm CSM and 6kg of Polyester resin per sqm in total. The thickness of the finished laminate is about 6mm. After this step, many reinforcements (wood panels) are...

Does anybody know a bladder (silicone or latex, for bladder moulding) manufacturer in Europe?

I used solid aluminium mandrel, polished, lots of high temp liquid release agent and wrapped it with 4 layers UD carbon fibre and one 2x2 (400gsm), cured at 180 C. Next day, after everything was at room temp, the required force we used in order to extract the mandrel was 7.5tons! Quit allot i...

Thank for the reply. High modulus fibres is not an issue. The CTE of this tube should be as close as possible to zero at the longitudinal direction (across the length of the tube). I believe UD fabric at around 0 degrees should work, however i am struggling to find a proper resin with as low as...

Thank you for your reply Compositepro. However, what do you mean by this: "Its much harder to pull-off than push-off." ?

What should be approximately the required force that has to be applied to the polished stainless steel mandrel in order to extract it from the manufactured carbon fiber tube? The length of the tube is 2 meters with a wall thickness 1.2mm and the diameter of the mandrel 30mm. The used carbon...

Hi, What is the CTE of a carbon fiber - epoxy structure (tube)? What should i do in order to manufacture this tube with almost zero CTE? Thanks in advance

Hi Compositepro, Thank you one more time for the advices and help. My first thought was about pressure moulding by the high difference of the thermal expansion of silicone and aluminium, but after a few calculations I found out that in this diameter the total expansion will not be enough to get...

what is the best material for the bladder? Is it silicone, latex or something else? We are making a tube of about 45mm diameter (but not constant along its length) and about 1800mm long. We CNCed the mould in aluminium (total 8 pieces with a 0.3mm gap between them when fully closed) and placed...

Thank you everybody for the help. We investigate the issue and have discovered that the properties of the cured pure epoxy are different to the ones when the epoxy was new. Now it is only 6 months old, stored in 20 C and in the original container all this time. The rod we made with just epoxy...

After a test we did to a part we manufacture, we discovered that when applying constant force to a certain point the deflection gets an initial value, which slowly increases in respect of time and gets its max value after about5 minutes. We did the same test to another identical part (but made...

"hand pultrusion unit" Can this be done?

Hi, We need to manufacture rods 6mm dia x 1m long, using UD carbon fibre and epoxy. Is there an alternative way to do this except pultrusion? Thanks

thanks for the help. i am producing UD carbon fibre bars. According to your indications, pultrusion is best for my case, and this is what i'll do.

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

Thank you Compositepro for the answer. I would rather avoid coolant due to the potential corrosion. Either way i do not think i will have durability and accuracy with a band saw. Compressed air didn't work either, and unfortunately, i can not find grid edge saw blades for my band saw (Metabo)...