Making Closed Molding Simple, Just Say When…
There are times in life when things are rather subjective or can change from time to time, one such scenario could be while dining. The waiter reaches over your salad with their pepper grinder hovering and says, "Just Say When" implying you tell them when to stop grinding pepper on top of your salad.
In contrast, when injecting a mold with resin there is a set volume the mold can accept.
Overfilling or underfilling the mold can have impacts on part quality, production performance, and the health of the molding operation, let alone lowering profits and wasting money.
Vacuum Infusion is not a Direct Replacement for Open Mold or RTM
Vacuum Infusion has continued to hold the spotlight of the FRP molding industry. In itself vacuum infusion (VARTM) is an excellent molding process. Producing products with high fiber load while offering a low entry investment, and is simply to educate staff on. However, many have stumbled with the hype that this "new" process is a drop in replacement for their current production. What are the differences between a product developed via open mold, closed mold (RTM, LRTM, HP-RTM, and vacuum infusion. Is vacuum infusion a drop in replace for your production?!
Composite Manhole Process Development
Edge boil is all too common when you're molding FRP manhole covers - particularly those striving for the H20/H25 and C250/EN124 standards. JHM Technologies, Inc. developed a solution that many molders of FRP manhole covers are transitioning to!
An Affordable, Production Ready Carbon Fiber Process is Here
Weight to strength ratio along with its aesthetic appearance has always made carbon fiber an attractive material choice. However due to it's excessive startup costs and molding complexities it has been out of reach for many, until now!
As close to Fire and Forget as it gets for VARTM
MTI® hose – "As close to Fire and Forget as it gets for VARTM"
The MTI® hose is a spiral tube with an outer jacket that allows for resin to be stopped at the edge of the tube by the barrier jacket, yet air can still pass by.
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Today…You Can Create Your Mold as Easy as Making a Part!
In the late 90's there were two innovative tooling methods to address the shortcomings of "soft" FRP Tooling as used for the "RTM" molding process at that time. [...]
Tip: Mold Process Troubleshooting
The key to repeatable molding process control in a RTM or LRTM tool is to have ACCURATE cavity thickness calibration. Most obvious consideration one would normally make is to use sheetwax of the same thickness desired for the final part thickness. [...]
Process Troubleshooting: Air Pockets Causing Mold Defects
Quite often we are sent photos or actual parts to determine root cause and solution for prevention of various part defects. In this example, a base seat of a chair was sent which exhibits gel-coat breaking away exposing a void beneath.
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RTM, LRTM, & VARTM Glossary
Quick Link:
A B C D E F G H I J K L M N O P Q R S T U V W X Y Z
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Ablative Plastic: Material that absorbs heat (with low material loss and char rate) through a decomposition process (pyrolysis) that takes place at or near the surface exposed to the heat.
ABS: Acrylonitrile Butadiene Styrene (Thermoplastic Resin).
Abrasion: Wearing away by friction. Glass is highly resistant to abrasion by other materials, but can be damaged through contact with itself. A lubricant is used during processing and fabrication to prevent abrasion.
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Demystifying the RTM Process
Resin Transfer Molding (RTM) is a low pressure, closed molding process which offers high-quality dimensional and surface finish composite moldings using liquid thermoset polymers reinforced with various forms of fiber reinforcements. Typically polymers of Epoxy, Vinyl Ester, Methyl Methacrylate, Polyester or Phenolic are used with fiberglass reinforcement. [...]
What is the RTM Process?
Resin Transfer Molding (RTM) is a low pressure, closed molding process which offers a dimensionally accurate and high quality surface finish composite molding, using liquid thermoset polymers reinforced with various forms of fiber reinforcements. [...]
