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Series: ASM Handbook
Volume: 7
Publisher: ASM International
Published: 30 September 2015
DOI: 10.31399/asm.hb.v07.a0006021
EISBN: 978-1-62708-175-7
... characteristics to be considered in the processing steps: venting, channel diameters, binder segregation, binder degradation, feedstock supply, temperature control, demolding, debinding, and sintering. Finally, the article provides information on powder injection molding mold-filling simulation and two-component...
Book: Casting
Series: ASM Handbook
Volume: 15
Publisher: ASM International
Published: 01 December 2008
DOI: 10.31399/asm.hb.v15.a0005276
EISBN: 978-1-62708-187-0
...-pressure die casting that uses vacuum alone to draw metal into the die. The VCR process, discussed elsewhere in this Volume, is limited by the size and cost of dies but has the advantages of high volume and improved surface and internal quality, like vacuum high-pressure casting. Air venting...
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
... should be considered for applications in which witness lines are undesirable. Blow Pins/Needles Venting Pinch-off Areas Mold Cooling/Heating Prototype Molds Because the blow-molding process forms hollow structures, the designer has a higher level of freedom to create part shapes...
Series: ASM Desk Editions
Publisher: ASM International
Published: 01 December 1998
DOI: 10.31399/asm.hb.mhde2.a0003171
EISBN: 978-1-62708-199-3
... Inclusions Oxide Films Secondary Phases Hot Tears Metal Penetration Gating System Components Recommended Practices Good Pouring Practice Venting Riser Design The gating system is the plumbing system that fills the mold with molten metal. Gating system nomenclature is shown...
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
... an upper gas input manifold and a lower gas exhaust manifold. The catalyst gas enters the core box through the blow ports or vents and passes through the core, causing almost instantaneous hardening of the resin-coated sand. The core is ready for ejection from the core box after purging with clean air...
Series: ASM Handbook
Volume: 5A
Publisher: ASM International
Published: 01 August 2013
DOI: 10.31399/asm.hb.v05a.a0005758
EISBN: 978-1-62708-171-9
...Regulators, Flow Meters, and Hoses Check Valves, Flashback Arrestors, and Excess Flow Valves Pressure-Relief Valves and Vents Gas Analyzers/Detectors Thermal Spray Gas Characteristics and Application-Specific Safety Hazards/Precautions Typical Thermal Spray Gas Plumbing...
Series: ASM Handbook
Volume: 2A
Publisher: ASM International
Published: 30 November 2018
DOI: 10.31399/asm.hb.v02a.a0006513
EISBN: 978-1-62708-207-5
... and availability of molten metal to feed the solidifying metal front. Venting must be placed advantageously to allow air and gas to escape ahead of the poured metal. Chills, which are sometimes inserted in the mold to initiate and accelerate solidification in desired locations and directions, must...
Book Chapter

By Justin Heimsch
Book: Casting
Series: ASM Handbook
Volume: 15
Publisher: ASM International
Published: 01 December 2008
DOI: 10.31399/asm.hb.v15.a0005273
EISBN: 978-1-62708-187-0
.... Notice the thick gate and runner cross sections feeding the part. Also, the part wall thickness conforms fairly well to the thick-to-thin filling ideal, while the gate has been located to minimize the potential for recombining metal fronts. The venting requirements of the thixocasting process...
Book Chapter

Series: ASM Desk Editions
Publisher: ASM International
Published: 01 November 1995
DOI: 10.31399/asm.hb.emde.a0003015
EISBN: 978-1-62708-200-6
.... These are generally incorporated in the supply hopper of the extruder to avoid extra handling. A vent will also expel volatiles. A vented extruder must have a two-stage feed screw, which will partially melt the feedstock in the first stage. The vent is located at the decompression zone of the two-stage feed screw...
Book: Casting
Series: ASM Handbook
Volume: 15
Publisher: ASM International
Published: 01 December 2008
DOI: 10.31399/asm.hb.v15.a0005318
EISBN: 978-1-62708-187-0
... Design Tolerance Materials for Die Casting Dies Wear and Failure Modes Factors Influencing Wear and Failure in Die Casting Dies Die Casting Machines Die Casting Dies Molten Metal Delivery Metal Injection Air Venting Feeding of Shrinkage Interaction of Fluid Flow with Dies...
Series: ASM Handbook
Volume: 5B
Publisher: ASM International
Published: 30 September 2015
DOI: 10.31399/asm.hb.v05b.a0006048
EISBN: 978-1-62708-172-6
... is an excellent method for filling the annulus, the space between the casing and the carrier pipe. This cutaway diagram shows the melted wax in the process of being pumped through the bottom vent. The wax will eventually fill the top vent. If the preexisting water has been removed, filling the casing is usually...
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
..., Overheating may cause explosive depolymerization G, Overheating may cause premature curing of (thermoset) compound H, Venting is recommended to remove volatiles and reduce splay I, Fiber reinforcement lengths may be severely reduced J, Overheating may produce chemical changes in the base polymer...
Book: Casting
Series: ASM Handbook
Volume: 15
Publisher: ASM International
Published: 01 December 2008
DOI: 10.31399/asm.hb.v15.a0005261
EISBN: 978-1-62708-187-0
... of CMI Equipment and Engineering, Inc., AuGres, MI When a casting cycle is initiated, the machine closes the mold, providing a critical airtight seal around the parting line of the mold. A controlled vacuum is applied through engineered passages (vacuum track) and vents in the upper mold half...
Book: Casting
Series: ASM Handbook
Volume: 15
Publisher: ASM International
Published: 01 December 2008
DOI: 10.31399/asm.hb.v15.a0009019
EISBN: 978-1-62708-187-0
..., causing shrinkage porosity. Fig. 10 Well-proportioned cored passages. Sand core was able to withstand normal foundry handling, provided stable positioning in the mold, and was easily vented. Fig. 11 Thin center section, formed by two cores, was not readily accessible to gating...
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
... attributed to Hoechst. Vacuum-assisted resin injection molds are usually vented. A partial vacuum is applied to provide mold clamping, reinforcement compaction, and an increase in the forcing- pressure gradient. The reduced internal pressure minimizes mold deflections, which is particularly important when...
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
... based on casting wall thickness and casting weight. Source: Adapted from Ref 2 Fig. 7 Relationship of solidification time to mold thickness for various casting section thicknesses for aluminum. Source: Adapted from Ref 2 Fig. 8 Various vent types used in permanent molds. Courtesy...
Series: ASM Desk Editions
Publisher: ASM International
Published: 01 November 1995
DOI: 10.31399/asm.hb.emde.a0003020
EISBN: 978-1-62708-200-6
... closes. After the part is designed, gating and venting of liquid molded components can generally be accomplished by means of runner systems in the tooling and proper orientation of the part in the tool. However, it is good design practice to consider both resin inlet gating and venting of air trapped...
Series: ASM Handbook
Volume: 11B
Publisher: ASM International
Published: 15 May 2022
DOI: 10.31399/asm.hb.v11B.a0006864
EISBN: 978-1-62708-395-9
... 5. McCree J.O. and Erwin L. , Vented Compression Molding , J. Eng. Ind. , Vol 106 (No. 2 ), May 1984 , p 103 – 108 10.1115/1.3185919 6. Elkington M. , Bloom D. , Ward C. , Chatzimichali A. , and Potter K. , Hand Layup: Understanding the Manual...
Series: ASM Handbook
Volume: 11B
Publisher: ASM International
Published: 15 May 2022
DOI: 10.31399/asm.hb.v11B.9781627083959
EISBN: 978-1-62708-395-9
Book Chapter

Book: Casting
Series: ASM Handbook
Volume: 15
Publisher: ASM International
Published: 01 December 2008
DOI: 10.31399/asm.hb.v15.a0005251
EISBN: 978-1-62708-187-0
... ). Patterns are identical to those used for green sand molding, except that vent holes must be judiciously placed around the patterns for plastic film adhesion. The pattern is then placed on a hollow carrier plate ( Fig. 4 ). A thin (0.05 to 0.10 mm, or 0.002 to 0.004 in.) plastic film is then heated...