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compression molded mounts

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Series: ASM Desk Editions
Publisher: ASM International
Published: 01 December 1998
DOI: 10.31399/asm.hb.mhde2.a0003172
EISBN: 978-1-62708-199-3
... Abstract This article discusses classification of foundry processes based on the molding medium, such as sand molds, ceramic molds, and metallic molds. Sand molds can be briefly classified into two types: bonded sand molds, and unbonded sand molds. Bonded sand molds include green sand molds...
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
... injection molding thermoset molding compounds INJECTION MOLDING refers to a variety of processes that generally involve forcing or injecting a fluid plastic material into a closed mold ( Ref 1 , 2 ). It is differentiated from compression molding, in which plastic materials in a soft but not fluid...
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
... adds to the cost. The basic steps involved in making a sand-flask mold from a permanent pattern are shown in Fig. 1 . The sequence begins with a mechanical drawing of the desired part. Patterns are then produced and mounted on pattern plates. Both the cope and drag patterns include core prints...
Book: Casting
Series: ASM Handbook
Volume: 15
Publisher: ASM International
Published: 01 December 2008
DOI: 10.31399/asm.hb.v15.a0005260
EISBN: 978-1-62708-187-0
... master cylinders and calipers, steering knuckles, valve housing, and engine mounting brackets. (b) Examples of semipermanent mold applications: intake manifolds, thermostat housing, transmission pump housing, engine mounting bracket, and oil pan component. Courtesy of General Aluminum Manufacturing Co...
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
... compressed air. After the cap has been secured in position, the air valve is opened. Air pressure against the molten metal ruptures the ceramic fiber diaphragm and forces the metal into the mold cavity. A pressure of 10 to 17 kPa (1.5 to 2.5 psi) is kept on the sprue for approximately 30 min. Fig. 7...
Series: ASM Desk Editions
Publisher: ASM International
Published: 01 November 1995
DOI: 10.31399/asm.hb.emde.a0003035
EISBN: 978-1-62708-200-6
... Abstract Sheet molding compound (SMC) is a composite material - consisting of glass-fiber-reinforced polyester in a resin matrix - that’s available in sheet form for the production of compression-molded parts. This article discusses the components incorporated into the resin paste, including...
Book Chapter

Book: Casting
Series: ASM Handbook
Volume: 15
Publisher: ASM International
Published: 01 December 2008
DOI: 10.31399/asm.hb.v15.a0005354
EISBN: 978-1-62708-187-0
... difficulty. With carbon dioxide gas curing, sodium silicate-sand mixtures develop a dry compressive strength that may be in excess of 1.4 MPa (200 psi). By this process, ready-to-use molds or cores can be made in a few minutes; no baking is needed. Often, molds are produced by the carbon dioxide process...
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
... casting. Courtesy of the Vulcan Group Investment casting uses an expendable/disposable pattern, typically made of wax and then coated with some type of slurry molding media. The wax positive shape of the part is usually made from tooling mounted in some type of wax injection machine. Again for...
Book: Casting
Series: ASM Handbook
Volume: 15
Publisher: ASM International
Published: 01 December 2008
DOI: 10.31399/asm.hb.v15.a0005308
EISBN: 978-1-62708-187-0
... hand or can be constructed with loose pieces and molded with the pattern. Match plate patterns ( Fig. 2 ) are split patterns in which the cope and drag (top and bottom) portions are mounted on opposite sides of a plate, called the match plate, conforming to the parting line. The pattern, as well as...
Book: Casting
Series: ASM Handbook
Volume: 15
Publisher: ASM International
Published: 01 December 2008
DOI: 10.31399/asm.hb.v15.a0005258
EISBN: 978-1-62708-187-0
... Abstract Horizontal centrifugal casting is used to cast parts having an axis of revolution. This article discusses the operations of various horizontal casting machines, such as flanged shaft machine, horizontal roller-type machine, and double-face plate machine. It describes the types of molds...
Book: Casting
Series: ASM Handbook
Volume: 15
Publisher: ASM International
Published: 01 December 2008
DOI: 10.31399/asm.hb.v15.a0005334
EISBN: 978-1-62708-187-0
... Abstract This article focuses on the variety of alloys, furnaces, and associated melting equipment and on the casting methods available for manufacturing magnesium castings. The casting methods include sand casting, permanent mold casting, die casting, thixomolding, and direct chill casting...
Book Chapter

Book: Casting
Series: ASM Handbook
Volume: 15
Publisher: ASM International
Published: 01 December 2008
DOI: 10.31399/asm.hb.v15.a0005244
EISBN: 978-1-62708-187-0
... core, which is mounted on a support plate (core plate) ( Fig. 1 ) for subsequent hardening by baking. Alternatively, the compacted sand-binder mix may be cured in the core box by the so-called hot box, cold box, or no-bake methods. Fig. 1 Basic principles of core molding. See text for discussion...
Series: ASM Desk Editions
Publisher: ASM International
Published: 01 December 1998
DOI: 10.31399/asm.hb.mhde2.a0003245
EISBN: 978-1-62708-199-3
... resins, are preferred by some metallographers. Because use of these mounting materials involves casting, many molds can be poured at one time. Room-temperature curing plastics usually require several hours (or overnight) to set; however, some formulations, set in 1 to 2 h, depending on the amount of...
Series: ASM Desk Editions
Publisher: ASM International
Published: 01 December 1998
DOI: 10.31399/asm.hb.mhde2.a0003247
EISBN: 978-1-62708-199-3
... cause structural changes, such as precipitation of a second phase from the supersaturated solid solution. Compression mounting compounds are therefore unsuitable. Distortion of the surface layers of tin and tin alloys may cause recrystallization, which will mask the true structure. For tin alloys in...
Book: Casting
Series: ASM Handbook
Volume: 15
Publisher: ASM International
Published: 01 December 2008
DOI: 10.31399/asm.hb.v15.a0005255
EISBN: 978-1-62708-187-0
... materials. It presents recommendations that which serve as a useful guide to the design of investment castings. The article tabulates the applications of the process and illustrates the Shellvest system for investment casting of small parts. It explains the manufacturing process of ceramic shell molds and...
Series: ASM Handbook
Volume: 5
Publisher: ASM International
Published: 01 January 1994
DOI: 10.31399/asm.hb.v05.a0001228
EISBN: 978-1-62708-170-2
... Abstract Mechanical cleaning systems are used to remove contaminants of work surface by propelling abrasive materials through any of these three principal methods: airless centrifugal blast blade- or vane-type wheels; compressed air, direct-pressure dry blast nozzle systems; or compressed-air...
Book: Casting
Series: ASM Handbook
Volume: 15
Publisher: ASM International
Published: 01 December 2008
DOI: 10.31399/asm.hb.v15.a0005352
EISBN: 978-1-62708-187-0
... the nozzle or pouring lip not move, relative to the mold, during pouring. In semiautomatic pouring units, bottom-pour ladles may be mounted above indexing molding lines to pour into molds indexed into position beneath the ladles ( Fig. 14 ). Synchronized pouring on a continuously moving mold line...
Series: ASM Desk Editions
Publisher: ASM International
Published: 01 November 1995
DOI: 10.31399/asm.hb.emde.a0003053
EISBN: 978-1-62708-200-6
... consolidation techniques, principally uniaxial pressing. The powders that are used must be agglomerated in order to evenly fill the dies and molds using automated die-loading equipment. Even filling is necessary to obtain predictable compression ratios and fill densities. These are especially important...
Series: ASM Desk Editions
Publisher: ASM International
Published: 01 November 1995
DOI: 10.31399/asm.hb.emde.a0003021
EISBN: 978-1-62708-200-6
... screws or bolts, nuts and washers, molded-in threads, self-threading screws, rivets, spring-steel fasteners, press fits, and snap fits. The article explains solvent bonding used for thermoplastic parts, and tabulates the solvent types used with various plastics. It also describes the surface preparation...
Book: Casting
Series: ASM Handbook
Volume: 15
Publisher: ASM International
Published: 01 December 2008
DOI: 10.31399/asm.hb.v15.a0005351
EISBN: 978-1-62708-187-0
... Abstract In the handling of molten aluminum, it is fairly common to use filters as a part of the melting unit and in the gating and/or riser system. This article describes the methods of in-furnace and in-mold filtration, with emphasis on the filtration of molten aluminum. It discusses the...