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compression-type 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
... control and safety. Fig. 14 Rotational molding equipment (clam-shell type) Compression Molding and Transfer Molding Compression molding and transfer molding (a variant of compression molding) are two of the oldest plastic processing methods. Compression Molding Compression...
Series: ASM Technical Books
Publisher: ASM International
Published: 01 November 2010
DOI: 10.31399/asm.tb.scm.t52870373
EISBN: 978-1-62708-314-0
... of these types of materials impregnated with polyester resin are shown in Table 14.5 . Spray-up, in which chopped glass fibers are mixed with resin and then sprayed onto the mold, produces more or less randomly oriented fibers 1 to 2 in. (2.5 to 5 cm) long. Since the fiber content is only moderate (30 to 35...
Series: ASM Technical Books
Publisher: ASM International
Published: 01 October 2012
DOI: 10.31399/asm.tb.lmub.t53550385
EISBN: 978-1-62708-307-2
...-matrix composites, the objective is often to increase the toughness rather than the strength and stiffness, and a low interfacial strength bond is therefore desirable. The type and quantity of the reinforcement determines the final properties. As shown in Fig. 8.3 , the highest strength and modulus...
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
... in engineering plastics for a variety of reasons. They generally reduce the cost of the material as well as the mold shrinkage. They improve the thermal conductivity and reduce the coefficient of thermal expansion. Their effect on mechanical properties depends on the amount and type of filler, but they generally...
Series: ASM Technical Books
Publisher: ASM International
Published: 01 December 2003
DOI: 10.31399/asm.tb.cfap.t69780051
EISBN: 978-1-62708-281-5
... accurate in maintaining dimensional tolerances. In most cases, tolerances can be expected to be within a few thousandths of an inch. Tolerances are determined to a large degree by the type of process used in manufacture. For melts, the melt pressure and tooling have a great influence. Blow molding...
Series: ASM Technical Books
Publisher: ASM International
Published: 01 December 2003
DOI: 10.31399/asm.tb.cfap.t69780185
EISBN: 978-1-62708-281-5
... mechanical analyses of viscoelastic plastics are briefly described. The discussion covers the most commonly used tests for impact performance, various types of hardness test for plastics, the fatigue strength of viscoelastic materials, and the tension testing of elastomers and fibers. creep testing...
Series: ASM Technical Books
Publisher: ASM International
Published: 01 November 2010
DOI: 10.31399/asm.tb.scm.t52870285
EISBN: 978-1-62708-314-0
... frequently due to its lower cost, better flow, and moldability. A comparison of these different forms of sheet molding compounds is given in Table 10.2 . Fig. 10.11 Types of sheet molding compound. Sheet molding compound (random) SMC-R; sheet molding compound (continuous/random) SMC-CR; sheet molding...
Series: ASM Technical Books
Publisher: ASM International
Published: 01 November 2012
DOI: 10.31399/asm.tb.ffub.t53610585
EISBN: 978-1-62708-303-4
... of loading, types of stress, and intended operating temperatures Failure mechanisms Types of loading Types of stress Operating temperatures Criteria generally useful for selection of material Static Repeated Impact Tension Compression Shear Low Room High Brittle fracture X X X X...
Series: ASM Technical Books
Publisher: ASM International
Published: 01 November 2010
DOI: 10.31399/asm.tb.scm.t52870489
EISBN: 978-1-62708-314-0
... Table 18.1 Common trade-offs when selecting composite materials Design decision Common trade-offs Typically lowest cost Typically highest performance Fiber type Cost, strength, stiffness, density (weight), impact strength, electrical conductivity, environmental stability, corrosion...
Series: ASM Technical Books
Publisher: ASM International
Published: 01 December 2003
DOI: 10.31399/asm.tb.cfap.t69780164
EISBN: 978-1-62708-281-5
... in.) radius Flat sheets of paper, films, fabrics, rubber, molded plastics, laminates, boards, glass, mica, and ceramic 2 Opposing cylinders 25 mm (1 in.) in diameter, 25 mm (1 in.) thick with edges rounded to 3.2 mm (0.125 in.) radius Same as for type 1, particularly for glass, mica, plastic...
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
... the rest of the surface. They may be doped by exposure to plasma containing n- or p -type impurities, or they may be plated to form conducting circuits. Integrated circuits are composed of many overlapping layers ( Fig. 13.9 ), each defined by photolithography. Dopants are diffused...
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
... become the most common type, and the following description of its operation illustrates the basic principles of all types. The functions performed by the machine include heating the plastic until it is able to flow readily under pressure, pressurizing this melt to inject it into a closed mold, holding...
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
..., Princeton, NJ Fig. 4.4 Ultimate tensile strength (UTS) of sintered 409L as a function of lubricant type and sintered density. Source: Ref 6 . Reprinted with permission from MPIF, Metal Powder Industries Federation, Princeton, NJ Fig. 4.15 Recommended designs for metal injection molded...
Series: ASM Technical Books
Publisher: ASM International
Published: 01 December 2003
DOI: 10.31399/asm.tb.cfap.t69780295
EISBN: 978-1-62708-281-5
...Abstract Abstract In an attempt to explain the stresses encountered in the plastics industry, this article first defines the different types of internal stresses in amorphous polymers. Each type of thermal stress is then discussed in detail, with reference to the mechanism of generation...
Series: ASM Technical Books
Publisher: ASM International
Published: 01 November 2010
DOI: 10.31399/asm.tb.scm.t52870031
EISBN: 978-1-62708-314-0
... Fibers , ASM Handbook , Vol 21 , Composites , ASM International , 2001 10.31399/asm.hb.v21.a0009241 Before examining the various types of fibers used as composite reinforcements, the major terminology used for fiber technology will be reviewed. Fibers are produced and sold in many forms...
Series: ASM Technical Books
Publisher: ASM International
Published: 01 December 2003
DOI: 10.31399/asm.tb.pnfn.t65900167
EISBN: 978-1-62708-350-8
... of resin-hardener mixture Correct resin-to-hardener ratio; blend mixture completely. There are essentially two types of mounting systems: the cold-mount system and the hot-mount system. Each has its own advantages and disadvantages. The two-component cold-mount system comprises a polymer...
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
...Classification system for foundry processes based on mold type Table 1 Classification system for foundry processes based on mold type Mold type Process Expendable mold processes/permanent patterns Clay-water bonds (green sand molding) Silica sand Olivine sand Chromite sand...
Book Chapter

Series: ASM Technical Books
Publisher: ASM International
Published: 01 October 2012
DOI: 10.31399/asm.tb.lmub.t53550511
EISBN: 978-1-62708-307-2
...; they usually consist of a mix of the two types of bonds. For example, silicon nitride (Si 3 N 4 ) consists of approximately 70% covalent bonds and 30% ionic bonds. Fig. 10.1 (a) Ionic and (b) covalent bonding. Source: Ref 10.1 Advanced ceramics are ceramic materials that exhibit superior...
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
...-compressibility characteristics. The relatively high purity of atomized powders has bridged this gap to a considerable extent. In addition, the high processing cost of electrolytic powders, in part related to environmental factors, has widened the cost differential between electrolytic and other types of metal...
Series: ASM Technical Books
Publisher: ASM International
Published: 01 June 2007
DOI: 10.31399/asm.tb.pmsspmp.t52000023
EISBN: 978-1-62708-312-6
... of cumulative undersized particle size distributions of water-atomized (80Ni-20Cr and type 316L) metal powders. Source: Ref 2 Fig. 3.7 Effect of apparent density on green strength and compressibility of 316L stainless steel powders. Source: Ref 34 Fig. 3.1 Examples of water-atomized...