Welcome to JHM Technologies’ RTM composites website, your one stop for all of your resin transfer (RTM) and Light RTM (LRTM) low pressure closed molding needs. Today, the LRTM form of resin transfer molding is the leading growth technology in the (GRP) glass reinforced plastic composite moulding industry worldwide. Yet, do not let the term “light” mislead you, the LRTM process is fully capable of producing the exact same weight and strengths of fiber reinforced plastic (FRP) composites as common to the RTM, SMC, SRIM, VARTM or numerous other forms of composite moulding processes known worldwide. While the historic use of closed molding has been with expensive tooling as common for the RIM, SMC, BMC, GMT and even the conventional (RTM) resin transfer moulding process methods, the innovations of the “LRTM” the Lite RTM process bring those tooling cost far lower, making the low pressure molding methods of the light RTM very practical and within reach of even the smaller open (hand lay-up or spray-up) molder.
The drive away from Chopper Guns as used in the spray-up methods of open or contact molding is fueled by both VOC emission regulation and by the skill required by the operator to pay attention to detail, not to mention the far superior work environment created by the use of various closed molding methods of LRTM, RTM, VARTM, as well, Vacuum Infusion, all of which produce a higher level of professional quality in the fiber reinforced plastic composites they produce. Void free, with two finished sides of the molded composites are just a part of the advantage inherent to the LRTM or any of the various forms of resin transfer molding. One of the main advantages of the LRTM, RTM, VARTM or Vacuum Infusion molding processes is the precise control of molding cost by producing an extremely repeatable part from the mold with each molding cycle. Repeatable resin usage of within 15 grams from part to part are not unheard of when using LRTM, VARTM or Vacuum infusion especially when used with the precise process control only available with the JHM Technologies’ Infuser Series of Injection Machines. Continued on Who is JHM Technologies....
