Molds complex

Products in this process can have deep sections and relatively sharp comers. However RM flat, particularly large relatively uniform wall thickness surfaces are difficult if not impossible to produce. This process can be used to mold complex products that may require three or four split molds. Also, different finished surfaces are obtained. For example, the products surface finish is dictated by the inside surface of the mold. This makes it easy to obtain smooth as well as textured surfaces on the product. Raised or depressed letters, fluting, and other decorative inscriptions may also be molded. 

Iso static Molding Complex geometry A few centimeters to 0.5 meters in the major dimension A few tens of grams to a few tens of kilograms... 

The commercial LCP/PPS blend is designed for injection molding complex electronic parts, chip carriers, sockets and cod bobbins. It is very likely that due to its low melt viscosity, LCP still forms the continuous phase, while PPS may simply be present as a dispersed filler along with the glass fibers. Very httle information about this blend has been pubhshed. 

S-glass See fiberglass type, shape See die shape product shape, shape and volume change See dilatant. shape, blow mold complex See blow molding, extruder, three-dimensional. 

Low material cost Minimal material storage problem Close control on part thickness and fiber content Thick complex parts can be molded in one shot High material cost (approximately 2x cost of RTM) Prepreg has short life at room temperature and must be stored in a freezer To achieve accurate thickness control, must use matched metal molds and computer controlled presses Difficult to mold complex parts in one shot... 

Chemical resistance, ease of molding complex shapes... 

Profiles can be manufactured with static pressing units (autoclave, upper ram press) as well as with semicontinuous or continuous units. Semicontinuous systems, like intermittent compression molding, enable the manufacture of continuous profiles. A distinction has to be made if the profile is open or closed. Open continuous profiles like U-, and triple V-profiles, can be manufactured with simple molds whereas the manufacture of closed profiles (e.g., double 1-profile or rectangular hollow profile) can only be realized with an increased mold complexity. Figure 1.218 illustrates a profile mold for the manufacture of open double-V profiles. This mold consists of... 

Good for molding complex shapes, especially when using composite molds. 

With the capability to fabricate replica molds from hard master molds, complex two-dimensional geometries that would be otherwise difficult to fabricate from conventional lithography techniques can be created. An example of this was described by Lucas et who were able to fabricate two-dimensional NIL molds through subsequent imprinting of a one-dimensional grating stmcture at various orientations parallel to the substrate. 

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