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injection-compression molding

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Series: ASM Technical Books
Publisher: ASM International
Published: 01 December 2003
DOI: 10.31399/asm.tb.cfap.t69780064
EISBN: 978-1-62708-281-5
... Methods<xref rid="t69780064-fn1" ref-type="fn">[1]</xref> The primary plastics processing methods are: Injection molding Extrusion Thermoforming Blow molding Rotational molding Compression molding/transfer molding Composites processing Casting Other plastics...
Series: ASM Technical Books
Publisher: ASM International
Published: 01 November 2010
DOI: 10.31399/asm.tb.scm.t52870285
EISBN: 978-1-62708-314-0
... Abstract This chapter discusses the effect of fiber length and orientation on the strength and stiffness of discontinuous-fiber composites. It also describes several fabrication processes, including spray-up, compression molding, reaction injection molding, and injection molding...
Series: ASM Technical Books
Publisher: ASM International
Published: 01 December 2003
DOI: 10.31399/asm.tb.cfap.t69780051
EISBN: 978-1-62708-281-5
...% of forming uses blow molding (10% of all plastics), thermoforming, compression molding, coating, laminating, rotational molding, and all others. However, injection molding is the most important, and, except for compression or transfer molding of thermosets, is usually the most accurate in maintaining...
Book Chapter

Series: ASM Technical Books
Publisher: ASM International
Published: 01 September 2005
DOI: 10.31399/asm.tb.gmpm.t51250077
EISBN: 978-1-62708-345-4
... are the most significant: Relative low cost (particularly for high-volume injection molded gears) Ease and speed of manufacture Wide range of configurations and complex shapes possible Elimination of machining and finishing operations Capability of fabrication with metal inserts and integral...
Image
Published: 30 April 2020
Fig. 10.34 Supercritical extraction of paraffin wax from injection-molded 0.6 μm alumina treated in compressed carbon dioxide for over 6 h at 85 °C (185 °F) and 28 MPa (4.1 ksi). Source: Chartier et al. ( Ref 20 , 21 ) More
Book Chapter

Series: ASM Technical Books
Publisher: ASM International
Published: 01 August 2013
DOI: 10.31399/asm.tb.ems.t53730139
EISBN: 978-1-62708-283-9
... variations of this process, called thixotropic or rheocasting , the melt is approximately half solid-half liquid when it is injected into the mold. Injection molding of thermoplastics is very much like injection molding of metals. Thermoplastics also can be extruded or blow molded. Single crystals...
Book Chapter

Series: ASM Technical Books
Publisher: ASM International
Published: 01 October 2012
DOI: 10.31399/asm.tb.lmub.t53550325
EISBN: 978-1-62708-307-2
... strength MPa ksi J/m ft lbf/in. Injection molding 20–76 2.9–11 1–46 50–100 1–2 Injection molding and extrusion 29–49 4.2–7.1 2–46 100–400 2–8 Extrusion 2–59 0.3–8.5 2–40 100–700 2–14 Glass fiber filled 66–100 9.6–16 1–4 50 to &gt;100 1 to &gt;2 Source: Ref 7.3...
Series: ASM Technical Books
Publisher: ASM International
Published: 01 October 2012
DOI: 10.31399/asm.tb.lmub.t53550385
EISBN: 978-1-62708-307-2
... or compression molding and fiberglass/polyester made by compression molding. Recreational vehicles have long used glass fibers, mostly for its durability and weight savings over metal. The product form is typically fiberglass sheet molding compound made by compression molding. For high-performance Formula 1...
Book Chapter

Series: ASM Technical Books
Publisher: ASM International
Published: 30 April 2020
DOI: 10.31399/asm.tb.bpapp.t59290111
EISBN: 978-1-62708-319-5
... to force feedstock into a closed die with the desired shape. Effectively, the process is similar to injection molding, with less sophistication. This compression molding approach is generally reserved for large, bulky items. Blow molding is a variant where the heated powder-binder feedstock is blown...
Series: ASM Technical Books
Publisher: ASM International
Published: 01 November 2010
DOI: 10.31399/asm.tb.scm.t52870373
EISBN: 978-1-62708-314-0
... to develop directional properties due to the fiber orientation that occurs during the injection process; chopped glass fibers can be added to the formulation to reduce the directionality. The properties of RRIM parts tend to be somewhat lower than those produced with compression-molded SMCs. Strength...
Book Chapter

Series: ASM Technical Books
Publisher: ASM International
Published: 30 April 2020
DOI: 10.31399/asm.tb.bpapp.t59290261
EISBN: 978-1-62708-319-5
... of an injection molding machine for metering and lling the die cavity. It has a taper along the length to compress the feedstock as it is metered for removal of trapped air, and a check ring at the tip to allow forward plunging motion during mold lling. screw molding. A reciprocating screw is used to mix...
Series: ASM Technical Books
Publisher: ASM International
Published: 30 April 2020
DOI: 10.31399/asm.tb.bpapp.9781627083195
EISBN: 978-1-62708-319-5
Book Chapter

Series: ASM Technical Books
Publisher: ASM International
Published: 01 June 2007
DOI: 10.31399/asm.tb.pmsspmp.t52000039
EISBN: 978-1-62708-312-6
... tolerate small internal flaws. Horizontal reciprocating screw machines are suitable for high-volume production. During a molding cycle, the screw initially rotates and compresses the feedstock. Then, for injection, the screw moves forward like a plunger. A high injection rate assures die fill before...
Series: ASM Technical Books
Publisher: ASM International
Published: 01 December 2003
DOI: 10.31399/asm.tb.cfap.t69780164
EISBN: 978-1-62708-281-5
... available forms Alkyds Excellent dielectric strength, arc resistance, and dry insulation resistance; low dielectric constant and dissipation factor Compression moldings, transfer moldings...
Series: ASM Technical Books
Publisher: ASM International
Published: 01 November 2010
DOI: 10.31399/asm.tb.scm.t52870119
EISBN: 978-1-62708-314-0
...-rate commercial process used primarily to make long fiberglass/polyester parts of constant cross section. Liquid molding includes resin transfer molding, vacuum-assisted resin transfer molding, and resin film infusion. These processes use a dry preform that is then injected with a liquid resin...
Book Chapter

Series: ASM Technical Books
Publisher: ASM International
Published: 01 June 2007
DOI: 10.31399/asm.tb.pmsspmp.t52000001
EISBN: 978-1-62708-312-6
... from state-of-the-art reviews on the powder metallurgy of stainless steels by Ambs et al. (1977) ( Ref 6 ), Dyke et al. (1983) ( Ref 7 ), and Klar (1987) ( Ref 8 ). Industrial growth of metal injection molding (MIM) commenced in the 1980s with some aerospace applications. The technology...
Book Chapter

Series: ASM Technical Books
Publisher: ASM International
Published: 01 November 2013
DOI: 10.31399/asm.tb.mfub.t53740047
EISBN: 978-1-62708-308-9
..., crucible, and vacuum melting, and common casting techniques such as sand casting, plaster and shell casting, evaporative pattern casting, investment casting, permanent mold casting, cold and hot chamber die casting, squeeze casting, semisolid metal processing, and centrifugal casting. casting...
Series: ASM Technical Books
Publisher: ASM International
Published: 01 November 2010
DOI: 10.31399/asm.tb.scm.t52870489
EISBN: 978-1-62708-314-0
..., are compression molded using highly automated production lines. Reaction injection molding (RIM) is a process for rapidly making unreinforced thermoset parts. A two-component highly reactive resin system is injected into a closed mold, where the resin quickly reacts and cures. Polyurethanes are the most...
Series: ASM Technical Books
Publisher: ASM International
Published: 30 April 2020
DOI: 10.31399/asm.tb.bpapp.t59290201
EISBN: 978-1-62708-319-5
..., distortion, postsintering treatments, and mechanical properties are presented for each. The shaping options include powder-binder approaches such as binder jetting, injection molding, extrusion, slip and slurry casting, centrifugal casting, tape casting, and additive manufacturing. Sintering options...
Book Chapter

Series: ASM Technical Books
Publisher: ASM International
Published: 01 November 2013
DOI: 10.31399/asm.tb.mfub.t53740373
EISBN: 978-1-62708-308-9
... and sintering. Powder injection molding (PIM) works best using powders with particle sizes up to approximately 20 μm (0.8 mils). The small powder particles, with high specific surface areas, provide the increased driving force for shrinkage during sintering to achieve nearly full density. The problem of powder...