Fiberglass Open Molding
Open molding using the typical chopper gun technique. These molds are relatively cost effective and are great for large lower volume production parts. Marine Plastics currently produces OEM automotive parts for Daimler Trucks with class “A” surfaces with this method.
The manufacturing cycle generally begins with gelcoat being applied to the mold surface. This will form the outer finished surface of the part. The mold is then cycled through the laminating area where the composite structural skin is applied. This composite laminate offers the high strength to weight ratios and dimensional stability which have made it the material of choice for the OEM truck industry.
 Open mold spray up |
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Fiberglass Closed Molding
Marine Plastics Ltd. has the capability of producing closed molded parts using the Resin Transfer Molding (RTM) process. This can be coupled with Multiple Insert Tooling (MIT) technology to further increase production. Parts with lower production volumes and less stringent tolerances can be molded using Vacuum Molding (VM).
Why use RTM? Parts will be Resin Transfer Molded using a refinement of the Light RTM process, with one “B” surface contra mold and multiple “A” molds. The process provides the benefits of open molding, such as application of Gelcoat using the conventional open mold spray procedure, with the quality and repeatability of closed molded RTM.
 RTM Mold |
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