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structural reaction injection molding
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Book: Composites
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
... Abstract Resin transfer molding and structural reaction injection molding belong to a family, sometimes denoted as liquid composite molding. This article provides information on the characteristics and automotive and aerospace applications of liquid composite molding. It reviews techniques...
Abstract
Resin transfer molding and structural reaction injection molding belong to a family, sometimes denoted as liquid composite molding. This article provides information on the characteristics and automotive and aerospace applications of liquid composite molding. It reviews techniques that use hard tooling and positive (superatmospheric) pressures to produce structures. The techniques include vacuum-assisted resin injection, vacuum infusion, resin-film infusion, and injection-compression molding. The article provides an overview of the materials that are commonly used together with some of processing characteristics that are important to processing speed and part quality. It concludes with a discussion on design guidelines for the liquid composite molding.
Series: ASM Desk Editions
Publisher: ASM International
Published: 01 November 1995
DOI: 10.31399/asm.hb.emde.a0003020
EISBN: 978-1-62708-200-6
... Abstract Resin transfer molding (RTM) and structural reaction injection molding (SRIM) are two similar processes that are well suited to the manufacture of large, complex, and high-performance structures. This article discusses the similarities and differences of RTM and SRIM processes...
Abstract
Resin transfer molding (RTM) and structural reaction injection molding (SRIM) are two similar processes that are well suited to the manufacture of large, complex, and high-performance structures. This article discusses the similarities and differences of RTM and SRIM processes and the unique design considerations with respect to the physical properties, geometry, surface quality, process economics, equipment, and tooling of a component that should be considered in choosing RTM or SRIM over other competing processes for fabricating reinforced components.
Image
in Resin Transfer Molding and Structural Reaction Injection Molding
> Engineered Materials Handbook Desk Edition
Published: 01 November 1995
Image
Published: 01 January 1997
Image
Published: 01 January 2001
Fig. 4 Design methodology for automotive composite structures. RTM, resin transfer molding; SRIM, structural reaction injection molding; CAD, computer-aided design; CAE, computer-aided engineering; TGA, thermogravimetric analysis; DSC, differential scanning calorimetry
More
Image
Published: 01 January 2001
Fig. 1 Production volume and relative part performance that can be achieved with various production techniques. SMC, sheet molding compounds; GMT, glass mat thermoplastics; RTM, resin transfer molding; SRIM, structural reaction injection molding; P/T, pressure/temperature
More
Series: ASM Handbook
Volume: 20
Publisher: ASM International
Published: 01 January 1997
DOI: 10.31399/asm.hb.v20.a0002491
EISBN: 978-1-62708-194-8
... was limited, these design guidelines are still being developed. Some other disadvantages of composite processing include high product cost, high equipment cost (and limited availability), and low production rates. Composite production processes include casting, reaction injection molding (RIM), structural...
Abstract
This article describes key processing methods and related design, manufacturing, and application considerations for plastic parts. The methods include injection molding, extrusion, thermoforming, blow molding, rotational molding, compression molding/transfer molding, composites processing, and casting. The article describes principal features incorporated into the design of plastic parts. It concludes with a discussion on the materials selection methodology for plastics.
Series: ASM Handbook
Volume: 11B
Publisher: ASM International
Published: 15 May 2022
DOI: 10.31399/asm.hb.v11B.a0006945
EISBN: 978-1-62708-395-9
...-styrene size-exclusion chromatography scanning electron microscope short ber reinforced polymer secondary ion mass spectroscopy styrene-maleic anhydride sheet molding compound Society of Plastics Engineers superplastic forming structural reaction injection molding scanning transmission electron...
Book: Composites
Series: ASM Handbook
Volume: 21
Publisher: ASM International
Published: 01 January 2001
DOI: 10.31399/asm.hb.v21.a0003474
EISBN: 978-1-62708-195-5
... . Fig. 4 Design methodology for automotive composite structures. RTM, resin transfer molding; SRIM, structural reaction injection molding; CAD, computer-aided design; CAE, computer-aided engineering; TGA, thermogravimetric analysis; DSC, differential scanning calorimetry Safety and Reliability...
Abstract
This article discusses the advantages of polymer matrix composite for automotive application in terms of design drivers, noise, vibration, harshness efficiency, process materials property constraints, safety and reliability, design optimization, structural and appearance requirements, recyclability, and processability. It describes the properties of high-volume composites used in automotive industries. The article provides a discussion on state-of-the-art and developing technologies in automotive field.
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
... 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 (CIM) Compression...
Abstract
Injection molding is a process of forcing or injecting a fluid plastic material into a closed mold. The process generally has the advantages of being more readily automated and of permitting finer part details. Injection-molding compounds are thermoplastic or thermosetting materials and their composites that are specifically formulated for the injection-molding process. This article discusses the injection molding process, which includes the two basic categories of thermoplastic and thermoset injection molding, and lists the common thermoplastic and thermoset molding compounds and applications. It also describes the operation of the different types of injection molding machines as well as mold design and process controls. The article also describes the selection of injection-moldable thermosets, and provides an overview of part performance, properties, blowing agents, and aesthetic concerns related to thermoplastic structural-foam injection molding.
Book Chapter
Book: Composites
Series: ASM Handbook
Volume: 21
Publisher: ASM International
Published: 01 January 2001
DOI: 10.31399/asm.hb.v21.a0005754
EISBN: 978-1-62708-195-5
... than or equal to SPC statistical process control WPE weight per epoxide maximum deviation SPF superplastic forming WR woven roving minus; negative ion charge sp gr speci c gravity wt% weight percent diameters (magni cation); multiplied by SRIM structural reaction injection molding XPS x-ray...
Book: Composites
Series: ASM Handbook
Volume: 21
Publisher: ASM International
Published: 01 January 2001
DOI: 10.31399/asm.hb.v21.a0003401
EISBN: 978-1-62708-195-5
... replaced with closed-mold techniques, such as resin transfer molding (RTM), structural reaction injection molding (SRIM), and vacuum infusion. The primary driver in this transition is reduction in volatile emissions to improve work environment and reduce factory emissions (or, alternatively, reduce air...
Abstract
This article explains the key features of the manufacturing techniques for polymer composites. It describes the selection of a technically and economically feasible manufacturing technique for a composite design. The article discusses widely accepted and emerging techniques to manufacture polymer composites such as open-mold techniques.
Book Chapter
Book: Powder Metallurgy
Series: ASM Handbook
Volume: 7
Publisher: ASM International
Published: 30 September 2015
DOI: 10.31399/asm.hb.v07.a0006183
EISBN: 978-1-62708-175-7
... k dielectric constant SPF superplastic forming l thermal conductivity sp gr speci c gravity m friction coef cient; linear attenuation coef cient; SRIM structural reaction injection molding magnetic permeability; the mean (or average) of a std standard min. distribution STEM scanning transmission...
Book: Composites
Series: ASM Handbook
Volume: 21
Publisher: ASM International
Published: 01 January 2001
DOI: 10.31399/asm.hb.v21.a0003395
EISBN: 978-1-62708-195-5
... processes, vacuum-assisted resin- transfer molding (VARTM), or structural reaction injection molding (SRIM), when used with preforms, can result in reduced handling time of the resin. The dry reinforcement is placed in the desired orientation, and then the resin is introduced. The ability of the resin...
Abstract
Designing composites for structural performance initially involves meeting a set of desired performance specifications at a minimum cost. This article discusses the factors that are considered in designing the manufacturing of polymeric composites. It describes the various aspects of manufacturing, forming process, and post-processing and fabrication for designing the composites.
Series: ASM Handbook
Volume: 11B
Publisher: ASM International
Published: 15 May 2022
DOI: 10.31399/asm.hb.v11B.a0006935
EISBN: 978-1-62708-395-9
... the heating cycle (as in the sheet molding compound process), by gas formation during the reaction (as in polyurethane reaction injection molding), or by adding a blowing agent. Addition of Fillers The addition of fillers can significantly reduce the apparent shrinkage of both thermoplastic...
Abstract
Manufacturing process selection is a critical step in plastic product design. The article provides an overview of the functional requirements that a part must fulfil before process selection is attempted. A brief discussion on the effects of individual thermoplastic and thermosetting processes on plastic parts and the material properties is presented. The article presents process effects on molecular orientation. It also illustrates the thinking that goes into the selection of processes for size, shape, and design factors. Finally, the article describes how various processes handle reinforcement.
Series: ASM Desk Editions
Publisher: ASM International
Published: 01 November 1995
DOI: 10.31399/asm.hb.emde.a0006515
EISBN: 978-1-62708-200-6
... Instrumentation Engineers polyethylene 'Yb interfacial energy SRIM structural reaction injection molding UL Underwriters' Laboratories "fs surface energy SSN sintered silicon nitride "ftv' "fst, "fss. "fsv interface energies (subscripts SSS solid-state sintering ULTI ultralow-temperature isotropic std standard...
Series: ASM Handbook
Volume: 20
Publisher: ASM International
Published: 01 January 1997
DOI: 10.31399/asm.hb.v20.a0005752
EISBN: 978-1-62708-194-8
... reaction injection molding LEFM linear-elastic fracture mechanics p page std standard In natural logarithm (base e) p pressure STEM scanning transmission electron log common logarithm (base 10) P applied load; power; pressure m matrix; meter Pa pascal microscopy m ion mass; Weibull modulus PCE pyrometric...
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
... degradation of mechanical properties. However, there are manufacturing processes and materials well suited for long assembly times. Many of the closed-mold processes, VARTM, or structural reaction injection molding (SRIM), when used with preforms can reduce the handling time of the resin. The dry...
Abstract
The goal of design is to improve the overall performance of the metal or ceramic matrix rather than to create a material with different response than the base matrix. This article focuses on the design for manufacturing polymeric composites. Specially developed methods including contact molding, compression-type molding, resin-injection molding, and pultrusion are described. The article also discusses the various factors to be considered in designing for composite manufacturing.
Book Chapter
Book: Composites
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
... blend or alloy, but similar conditions might cause another molding compound to flow unevenly. Fig. 6 The tortuous path of injection molding compounds Plastic resins obtained directly from a chemical reaction rarely exhibit the properties that are essential to meet the flow requirements...
Abstract
Molding compounds are plastic materials in varying stages of pellets or granulation that consist of resin, filler, pigments, reinforcement, plasticizers, and other ingredients ready for use in a molding operation. This article describes the material components and physical properties of sheet molding compounds (SMC). The three types of resin paste mixing techniques, such as batch, batch/continuous, and continuous, for an SMC operation are reviewed. The article discusses the design features and functional operations of the two types of SMC machines, namely, continuous-belt and beltless machines. It explains the formulation and processing of bulk molding compounds and reviews molding methods for bulk molding compounds, including compression, transfer, and injection molding. The effects of the fiber type and length and the matrix type on thermoset bulk molding compounds are discussed. It describes the four injection molding processes of injection molding compounds such as feeding, transporting, injecting, and flowing.
Book
Series: ASM Handbook
Volume: 21
Publisher: ASM International
Published: 01 January 2001
DOI: 10.31399/asm.hb.v21.9781627081955
EISBN: 978-1-62708-195-5
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