1-20 of 204 Search Results for

compression molding

Follow your search
Access your saved searches in your account

Would you like to receive an alert when new items match your search?
Close Modal
Sort by
Series: ASM Desk Editions
Publisher: ASM International
Published: 01 November 1995
DOI: 10.31399/asm.hb.emde.a0003019
EISBN: 978-1-62708-200-6
... Abstract The compression molding process is most commonly called the sheet molding compound (SMC) process in reference to the precursor sheet molding compound material it uses. This article discusses the types of materials used for sheet manufacture, and describes the manufacturing and...
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...
Series: ASM Desk Editions
Publisher: ASM International
Published: 01 November 1995
DOI: 10.31399/asm.hb.emde.a0003020
EISBN: 978-1-62708-200-6
... reinforced components. Compression molding and thermoplastic stamping are considered to be the primary competitors for liquid molding, with filament winding and injection molding being treated as competing processes for some specialty applications. Cost and processibility often determine the...
Book Chapter

Series: ASM Desk Editions
Publisher: ASM International
Published: 01 November 1995
DOI: 10.31399/asm.hb.emde.a0003034
EISBN: 978-1-62708-200-6
.... Bulk molding compounds are processed by compression, transfer, and injection molding. Compression molding is used for large parts and wherever strength is critical to a molded part. This molding method causes the least amount of damage to reinforcing fibers, and in some cases the orientation of the...
Book Chapter

Series: ASM Desk Editions
Publisher: ASM International
Published: 01 November 1995
DOI: 10.31399/asm.hb.emde.a0003016
EISBN: 978-1-62708-200-6
... process forms hollow structures, the designer has a higher level of freedom to create part shapes, in comparison with injection molding, compression molding, reaction injection molding, extrusion, or thermoforming. Part consolidation, ease of assembly, fastener reduction, structural integrity, and design...
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...
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

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
...-density and low-pressure molding includes manually operated jolt-squeeze units. The green compressive strengths of the sand for these units is generally in the low-to-mid teens (given in pounds per square inch). Methylene blue clay contents typically range from 5 to 8%. Medium-density units include...
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.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...
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
.... Catastrophic coating failure or wear are not the only limiting factors of coating life. Even if a coating remains intact on the mold, over time the coating layer will begin to compress due to thermal cycling and pressure. This results in the loss of internal coating porosity and begins to adversely affect the...
Book Chapter

Book: Casting
Series: ASM Handbook
Volume: 15
Publisher: ASM International
Published: 01 December 2008
DOI: 10.31399/asm.hb.v15.a0005299
EISBN: 978-1-62708-187-0
... Abstract Sand mold and permanent mold castings are the major methods for shape casting of steels, with production closely split among green sand, chemically bonded sand, and permanent mold processes. This article describes the steel solidification characteristics, melting practices, melt...
Book: Casting
Series: ASM Handbook
Volume: 15
Publisher: ASM International
Published: 01 December 2008
DOI: 10.31399/asm.hb.v15.a0005242
EISBN: 978-1-62708-187-0
... content range. It is usually added in the form of wood flour, ground cereal husks, or nut shells. Cellulose reduces hot compressive strength and provides good collapsibility, thus improving shakeout. At high temperatures, it forms soot (an amorphous form of carbon), which deposits at the mold/metal...
Book: Casting
Series: ASM Handbook
Volume: 15
Publisher: ASM International
Published: 01 December 2008
DOI: 10.31399/asm.hb.v15.a0005259
EISBN: 978-1-62708-187-0
...: minimum wall thickness and weight ratio of mold to casting. A steel sleeve or master die holder is usually employed with a heat shrink-fit over the graphite mold. The steel is preheated to 425 °C (800 °F) for this shrink-fit; therefore, there is considerable compression on the graphite mold. The graphite...
Book: Casting
Series: ASM Handbook
Volume: 15
Publisher: ASM International
Published: 01 December 2008
DOI: 10.31399/asm.hb.v15.a0005296
EISBN: 978-1-62708-187-0
... continuous casting of steel. It reviews the trends in the steel industry, such as near-net shape casting, the use of tundish metallurgy, and pouring stream protection. The article discusses the use and capabilities of different molds for steel continuous casting. These include thin-wall tube-type molds...
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
... Abstract This article provides a general introduction on casting processes and design. It discusses the process steps and methods of the main categories of shape casting methods, namely, expendable molds with permanent patterns, expendable molds with expendable patterns, and metal or permanent...
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
... the heat, the plastic cools, and the form is set. Timing, speed, mold seal, tool design, compressed air, air evacuation, and sheet temperature gradients are all important factors in the forming process. The temperature of the mold, which has absorbed heat from the plastic sheet, must be reduced if...
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
... in high-pressure molding machines ( Ref 10 ). In addition, the polyurethane and epoxy resins typically used for patterns have the following desirable characteristics: Better compressive strength, bending strength, abrasion resistance, and impact resistance than wood Resistance to...
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...