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demolding

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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
..., 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 powder injection molding, offering a method for high-volume...
Series: ASM Handbook
Volume: 21
Publisher: ASM International
Published: 01 January 2001
DOI: 10.31399/asm.hb.v21.a0003403
EISBN: 978-1-62708-195-5
... considerations for composite tool design, such as master model or pattern design selection, fiber and fabric selection, resins, and surface coat and ply. Various tool laminate construction techniques, such as curing and demolding, and cutting and trimming, are reviewed. The article also describes...
Series: ASM Handbook
Volume: 21
Publisher: ASM International
Published: 01 January 2001
DOI: 10.31399/asm.hb.v21.a0003406
EISBN: 978-1-62708-195-5
... is important for hand lay-up and spray-up. Proper preparation of the mold surface using correct mold-release application and preparation plays a key role in demolding the product. It is essential that the gel coat layer is applied in the correct thickness and evenly distributed over the total area, to avoid...
Series: ASM Handbook
Volume: 21
Publisher: ASM International
Published: 01 January 2001
DOI: 10.31399/asm.hb.v21.a0003401
EISBN: 978-1-62708-195-5
... until it becomes dimensionally stable. If the reinforcement needs to be impregnated as part of the process, a pressure gradient is required to force the matrix through the fiber bed. For thermoset matrices, the time interval from (preimpregnated) molding compound to demoldable part is on the order...
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
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
Series: ASM Desk Editions
Publisher: ASM International
Published: 01 November 1995
DOI: 10.31399/asm.hb.emde.a0003020
EISBN: 978-1-62708-200-6
... molding will result in uneven wall thicknesses, residual stress in the final part, bulging and distortion of the part upon demolding, or a combination of these. If foam cores are used, either cycle times must be short enough to prevent them from reaching a temperature above their maximum stable use...
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
... solidified, the furnace pressure is released, and the casting cools until it has hardened enough to withstand the forces applied to it during demolding and ejection from the upper die half. The die then opens, and the casting is ejected during the mold-open phase of the casting cycle. Fig. 11...
Series: ASM Handbook
Volume: 21
Publisher: ASM International
Published: 01 January 2001
DOI: 10.31399/asm.hb.v21.a0003479
EISBN: 978-1-62708-195-5
...). The composite board has a polyurethane (PUR) honeycomb core, because it provides significant weight savings over a wood core, with no loss of stiffness. Polyurethane reduces production times (less than 10 min from mold preparation to demolding) and reduces the number of components. Polyurethane provides...
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
... thermoplastics, especially when the mold is textured. Crystalline engineering thermoplastics have a shrinkage rate that is equal to or greater than polyolefins, but can still achieve good surface reproduction with proper venting and texture depth. Fig. 5 Draft angle that facilities demolding part...
Series: ASM Handbook
Volume: 21
Publisher: ASM International
Published: 01 January 2001
DOI: 10.31399/asm.hb.v21.a0003414
EISBN: 978-1-62708-195-5
... the mold and impregnates the reinforcement. The resin cures. The mold is opened and the product is demolded. A general way of distinguishing between different resin injection techniques is how the pressure gradient is applied to force the resin to flow through the mold. In the case of vacuum...
Series: ASM Handbook
Volume: 21
Publisher: ASM International
Published: 01 January 2001
DOI: 10.31399/asm.hb.v21.a0003402
EISBN: 978-1-62708-195-5
... between the fibers, and if the part had cured sufficiently to retain its shape when it is demolded. A process model can let the engineer or the scientist “see” the filling pattern (as shown in Fig. 2 ) and the curing rate, thus quantifying the knowledge of the filling process. While learning more about...
Book Chapter

Series: ASM Desk Editions
Publisher: ASM International
Published: 01 November 1995
DOI: 10.31399/asm.hb.emde.a0003017
EISBN: 978-1-62708-200-6
... to collapse for demolding. Design Detail Parts cannot have solid ribs or projections because the plastic will not flow into narrow, deep ribs. Reinforcing ribs can be designed as long as they are wide enough for the plastic to flow into them and form a wall over each parallel surface, as shown in Fig...
Series: ASM Handbook
Volume: 2A
Publisher: ASM International
Published: 30 November 2018
DOI: 10.31399/asm.hb.v02a.a0006498
EISBN: 978-1-62708-207-5
... oxides and other defects. Fig. 11 Schematic drawing of the SEED (swirled equilibrium enthalpy device) process. (a) Tilting and pouring. (b) Swirling. (c) Demolding and transfer. (d) High-pressure die casting (HPDC) press. Courtesy of STAS Inc. With the high-solid-fraction processes...
Series: ASM Handbook
Volume: 21
Publisher: ASM International
Published: 01 January 2001
DOI: 10.31399/asm.hb.v21.a0003409
EISBN: 978-1-62708-195-5
... to be applied in one or several layers between the peel-ply and release-film layers. Prepregs are now reliably produced with a highly controlled resin content of typically 34 ± 1% by weight. Figure 7 ( Ref 2 ) shows a cured, demolded, and trimmed Formula 1 car chassis, upper half. Figure 8 shows...
Book: Casting
Series: ASM Handbook
Volume: 15
Publisher: ASM International
Published: 01 December 2008
DOI: 10.31399/asm.hb.v15.a0005257
EISBN: 978-1-62708-187-0
... with undercuts can be demolded from the rubber mold with no difficulty. Thin-walled parts can be molded comparable to die casting. The rubber mold is not as precise as the metal mold, but the surface finish is generally good. However, blisters (very small pinpoint holes) were often found the surface of the thick...
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
... may double these outputs. Heating and curing times vary with part thickness and resin formulation. Urethane-based SRIM resins may be sufficiently rigid for demolding within 40 s of mold fill, while thick sections or epoxy laminates may require several hours in the mold. Process times are generally...
Series: ASM Handbook
Volume: 21
Publisher: ASM International
Published: 01 January 2001
DOI: 10.31399/asm.hb.v21.a0003407
EISBN: 978-1-62708-195-5
... of differential thermal properties of the tool (often low-cost glass composite) and the component and extreme dimensions (up to 50 m, or 165 ft, long), it is desirable to cure the laminate in one operation to avoid prerelease or demolding. This requires a long out-time prepreg, because the lay-up process can take...
Book Chapter

Series: ASM Desk Editions
Publisher: ASM International
Published: 01 November 1995
DOI: 10.31399/asm.hb.emde.a0003041
EISBN: 978-1-62708-200-6
Series: ASM Handbook
Volume: 2
Publisher: ASM International
Published: 01 January 1990
DOI: 10.31399/asm.hb.v02.a0001105
EISBN: 978-1-62708-162-7