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vacuum-assisted resin transfer molding

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Series: ASM Handbook
Volume: 9
Publisher: ASM International
Published: 01 December 2004
DOI: 10.31399/asm.hb.v09.a0009071
EISBN: 978-1-62708-177-1
... transfer molding, vacuum-assisted resin transfer molding, and resin film infusion. It explains the composite- and matrix-toughening methods for fiber-reinforced composites, such as dispersed-phase toughening and interlayer toughening. The article concludes with information on optical microscopy, which...
Series: ASM Handbook
Volume: 21
Publisher: ASM International
Published: 01 January 2001
DOI: 10.31399/asm.hb.v21.a0003398
EISBN: 978-1-62708-195-5
... the resin selection in designing the composite for use in a particular application. The article illustrates the various methods that are used to process a composite component, namely, wet lay-up, autoclave, resin transfer molding, and vacuum-assisted resin transfer molding. It provides a discussion on...
Series: ASM Handbook
Volume: 21
Publisher: ASM International
Published: 01 January 2001
DOI: 10.31399/asm.hb.v21.a0003413
EISBN: 978-1-62708-195-5
... aerospace applications vacuum-assisted resin injection vacuum infusion resin-film infusion injection-compression molding RESIN TRANSFER MOLDING (RTM) and structural reaction injection molding (SRIM) belong to a family, sometimes denoted liquid composite molding. The common feature is the injection...
Series: ASM Desk Editions
Publisher: ASM International
Published: 01 November 1995
DOI: 10.31399/asm.hb.emde.a0003020
EISBN: 978-1-62708-200-6
... referred to as resin transfer molding is the vacuum-assisted resin injection process currently used to manufacture specialty automobiles ( Ref 7 ). As currently practiced, the process uses epoxy tooling similar to high-quality prototype tooling. Large and dry reinforcement preforms (shaped glass mat and...
Book Chapter

Series: ASM Handbook
Volume: 21
Publisher: ASM International
Published: 01 January 2001
DOI: 10.31399/asm.hb.v21.a0003370
EISBN: 978-1-62708-195-5
... compounds may accumulate, and the increased residence of time and heat will degrade them at this vent point. Attaching a vacuum pump to this vent point will further reduce the volatile content of the molding compound. Thermoset molding compounds are rarely vented, because their formulations usually...
Series: ASM Desk Editions
Publisher: ASM International
Published: 01 December 1998
DOI: 10.31399/asm.hb.mhde2.a0003172
EISBN: 978-1-62708-199-3
..., dry sand molds, resin-bonded sand molds, and sodium silicate bonded sand. The article describes the casting processes that use these molds, including the no-bake process, cold box process, hot box process, the CO2 process, lost foam casting process and vacuum molding process. The casting processes...
Series: ASM Handbook
Volume: 21
Publisher: ASM International
Published: 01 January 2001
DOI: 10.31399/asm.hb.v21.a0003432
EISBN: 978-1-62708-195-5
... used to make preimpregnated reinforcing fibers (prepreg) or to infiltrate a fiber preform via resin transfer molding, vacuum assisted resin transfer molding, or resin film infusion. Testing on the resin blends are performed by either the resin manufacturer or the end user. Resins that...
Series: ASM Handbook
Volume: 21
Publisher: ASM International
Published: 01 January 2001
DOI: 10.31399/asm.hb.v21.a0003415
EISBN: 978-1-62708-195-5
... ) and vacuum-assisted molding are practiced in a few cases where very high-quality surface finishes are required. Fig. 11 Typical features of a compression mold (example shown is a mold design for forming a spare tire wheel well) The most modern molds incorporate some trimming and hole...
Book: Casting
Series: ASM Handbook
Volume: 15
Publisher: ASM International
Published: 01 December 2008
DOI: 10.31399/asm.hb.v15.a0005249
EISBN: 978-1-62708-187-0
.... Because of this low permeability, either vacuum assist or pressure is usually required for the pouring of molds. Simple gravity pouring is rarely done. Most foundries use vacuum assist for pouring conventional plaster molds. A typical setup for vacuum-assist pouring is shown schematically in Fig. 5...
Book Chapter

Series: ASM Desk Editions
Publisher: ASM International
Published: 01 November 1995
DOI: 10.31399/asm.hb.emde.a0003014
EISBN: 978-1-62708-200-6
... and reacts to form a glass-reinforced solid part. This process, which is either called structural RIM, resin transfer molding, or resin injection molding, is discussed in the article “Resin Transfer Molding and Structural Reaction Injection Molding” in this Volume. Compression injection molding...
Book Chapter

Book: Casting
Series: ASM Handbook
Volume: 15
Publisher: ASM International
Published: 01 December 2008
DOI: 10.31399/asm.hb.v15.a0005243
EISBN: 978-1-62708-187-0
... patterns are mounted in these machines on a hollow pattern carrier ( Fig. 13 ). A grid supports the underside of the pattern to avoid flexing during compaction. The molding chambers are formed by the pattern, the four sides of the molding chamber, and a plate with a sand n slot. Vacuum is used to evacuate...
Series: ASM Handbook
Volume: 21
Publisher: ASM International
Published: 01 January 2001
DOI: 10.31399/asm.hb.v21.a0003447
EISBN: 978-1-62708-195-5
... configuration. Factors that affect mechanical properties are resin-to-fiber ratio, resin and fiber types, resin-fiber interface, type of composite processing (filament winding, tape wrapping, or molding), and type of composite cure (autoclave, hydroclave, vacuum bag molding, extrusion, or compression or...
Book Chapter

Series: ASM Desk Editions
Publisher: ASM International
Published: 01 November 1995
DOI: 10.31399/asm.hb.emde.a0003018
EISBN: 978-1-62708-200-6
... into the cavity, and vacuum is applied to transfer the sheet from the plug to the mold surface. Fig. 5 Pressure bubble plug-assist vacuum thermoforming. (a) Air blown through bottom of mold cavity stretches the sheet into a bubble shape. (b) Plug pushes sheet into cavity. (c) Vacuum draws sheet...
Book Chapter

Series: ASM Handbook
Volume: 9
Publisher: ASM International
Published: 01 December 2004
DOI: 10.31399/asm.hb.v09.a0003786
EISBN: 978-1-62708-177-1
... provides information on the molds and resins used for castable mounts, vacuum treatment of mounts, special mount arrangements, and mount marking and storage. castable mounts cleaning compression molded mounts handling mechanical clamps metallographic polishing mount defects mount marking...
Series: ASM Desk Editions
Publisher: ASM International
Published: 01 November 1995
DOI: 10.31399/asm.hb.emde.a0003032
EISBN: 978-1-62708-200-6
..., resin and fiber types, resin-fiber interface, type of composite processing (filament winding, tape wrapping, or molding), and type of composite cure (autoclave, hydroclave, vacuum bag molding, extrusion, or compression or injection molding). In addition, these observations on material properties in...
Series: ASM Handbook
Volume: 21
Publisher: ASM International
Published: 01 January 2001
DOI: 10.31399/asm.hb.v21.a0003414
EISBN: 978-1-62708-195-5
... Abstract Vacuum infusion is a resin injection technique derived from resin transfer molding. This article discusses the characteristics of the technique and its applications. It presents the theory and background of the technique and provides an illustration of how parts are made. The article...
Series: ASM Handbook
Volume: 21
Publisher: ASM International
Published: 01 January 2001
DOI: 10.31399/asm.hb.v21.a0003435
EISBN: 978-1-62708-195-5
...), or vacuum-assisted RTM (VARTM), resin flow paints much of the picture. Current sensor-based process control procedures use dielectric sensing ( Ref 3 , 4 ), which would readily transfer to liquid molding applications. Several methods exist to begin the process of curing a composite resin system...
Series: ASM Handbook
Volume: 21
Publisher: ASM International
Published: 01 January 2001
DOI: 10.31399/asm.hb.v21.a0003404
EISBN: 978-1-62708-195-5
... shell, mounting the shell to a support structure, and adding heating/ cooling lines, vacuum systems, and ejectors (if required) than machining a mold. It is possible using an electroformed mold to produce parts having a variety of contours at the pressures typically used in most molding processes...
Book: Casting
Series: ASM Handbook
Volume: 15
Publisher: ASM International
Published: 01 December 2008
DOI: 10.31399/asm.hb.v15.a0009015
EISBN: 978-1-62708-187-0
... made from inorganic compounds such as silicates or organic resins Shell molding of sand with a thin resin-bonded shell that is baked No-bond vacuum molding of sand, where molding media is held together with a vacuum source Plaster-mold casting Ceramic-mold casting Rammed graphite molding...
Series: ASM Handbook
Volume: 20
Publisher: ASM International
Published: 01 January 1997
DOI: 10.31399/asm.hb.v20.a0002492
EISBN: 978-1-62708-194-8
... psi). The process can be vacuum assisted (VARTM) to prevent trapped air pockets and to assist with the flow of resin. The curing time is a function of the resin and can vary from about 15 min to on the order of 1 h. This process is considered intermediate between spray-up and the faster pressure...