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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
... be insulated and contain cooling lines to provide thermal separation between the hot barrel and the hopper. This prevents material from melting prematurely and forming a solid plug (referred to as a bridge) that blocks material from feeding to the extruder. Located inside the cylindrical barrel channel...
Series: ASM Handbook
Volume: 11A
Publisher: ASM International
Published: 30 August 2021
DOI: 10.31399/asm.hb.v11A.a0006831
EISBN: 978-1-62708-329-4
... Cracked or broken mold A 200 Massive projections A 210 Swells A 212 (a) Excess metal in the vicinity of the gate or beneath the sprue Erosion, cut, or wash A 213 (a) Metal projections in the form of elongated areas in the direction of mold assembly Crush A 220...
Series: ASM Handbook Archive
Volume: 11
Publisher: ASM International
Published: 01 January 2002
DOI: 10.31399/asm.hb.v11.a0003508
EISBN: 978-1-62708-180-1
... in planes related to direction of mold assembly (precision casting with waste pattern); principal casting dimensions change Cracked or broken mold A 200: Massive projections A 210: Swells A 212 (a) Excess metal in the vicinity of the gate or beneath the sprue Erosion, cut, or wash...
Series: ASM Handbook
Volume: 11A
Publisher: ASM International
Published: 30 August 2021
DOI: 10.31399/asm.hb.v11A.9781627083294
EISBN: 978-1-62708-329-4
Series: ASM Handbook
Volume: 11B
Publisher: ASM International
Published: 15 May 2022
DOI: 10.31399/asm.hb.v11B.a0006916
EISBN: 978-1-62708-395-9
... and contain only surface moisture. Simple hot air drying is sufficient for such materials. Conversely, polar materials are hydrophilic and therefore have a high affinity for moisture. Materials such nylons, polycarbonates (PC), polyesters, and polyurethanes (PU) are considered hygroscopic and must...
Series: ASM Handbook
Volume: 11B
Publisher: ASM International
Published: 15 May 2022
DOI: 10.31399/asm.hb.v11B.a0006915
EISBN: 978-1-62708-395-9
... such as PE can also be cross linked after the shaping operation. Polyethylenes used in wire coating are frequently cross linked to reduce hot creep, which is the deformation of plastics exposed to stress and elevated temperatures for prolonged periods. Supermolecular Considerations Supermolecular...
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