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blow-molding design

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Series: ASM Technical Books
Publisher: ASM International
Published: 01 December 2003
DOI: 10.31399/asm.tb.cfap.t69780064
EISBN: 978-1-62708-281-5
... effective, it allows the designer the opportunity to create true three-dimensional part shapes. (Many plastic processes, such as extrusion, blow molding, thermoforming, and rotational molding, do not allow the designer to control all surfaces of the plastic part being manufactured. One surface is a function...
Series: ASM Technical Books
Publisher: ASM International
Published: 01 January 2022
DOI: 10.31399/asm.tb.isceg.t59320011
EISBN: 978-1-62708-332-4
... of molds. Because the pattern life depends on several factors, such as the molding media, tooling design, and hardness of the pattern material, Table 3.1 is for general guidance only. General guide for pattern material choice Table 3.1 General guide for pattern material choice Pattern...
Series: ASM Technical Books
Publisher: ASM International
Published: 01 December 2003
DOI: 10.31399/asm.tb.cfap.t69780051
EISBN: 978-1-62708-281-5
... simplify the assembled product and thus give rise to savings in installed cost? Manufacturing Options Should the proposed design be machined, injection molded, or extruded, considering the number of parts to be made, the design geometry, and tolerances? If injection molding is chosen, how can...
Series: ASM Technical Books
Publisher: ASM International
Published: 30 November 2023
DOI: 10.31399/asm.tb.ceeg.t59370059
EISBN: 978-1-62708-447-5
... Abstract Molding flasks and other supplementary equipment are essential for molding complex shapes at competitive production rates and costs. This chapter addresses the design aspects of molding flasks and accessories, the features and handling accessories of molding machines, core making...
Book Chapter

Series: ASM Technical Books
Publisher: ASM International
Published: 01 October 2012
DOI: 10.31399/asm.tb.lmub.t53550325
EISBN: 978-1-62708-307-2
... materials with high molecular weights. This is especially true for extrusion and blow molding, which require sufficient melt strength for the extrudate to support itself as it exits from the die. Copolymerization is also frequently used to change the properties of plastics. For example, copolymerization...
Series: ASM Technical Books
Publisher: ASM International
Published: 01 December 2003
DOI: 10.31399/asm.tb.cfap.t69780164
EISBN: 978-1-62708-281-5
... on the application, plastics may be formulated and processed to exhibit a single property or a designed combination of mechanical, electrical, chemical, thermal, optical, and aging properties. The Society of the Plastics Industry classifies plastic materials based on the aforementioned properties, which are derived...
Book Chapter

Series: ASM Technical Books
Publisher: ASM International
Published: 01 December 1995
DOI: 10.31399/asm.tb.sch6.t68200164
EISBN: 978-1-62708-354-6
... presents the factors that govern the space requirements for pattern storage. casting design casting molds dimensional tolerances pattern equipment shrinkage steel castings Introduction Pattern equipment is the tooling utilized to form the mold cavity of a casting. The pattern equipment...
Series: ASM Technical Books
Publisher: ASM International
Published: 01 September 2005
DOI: 10.31399/asm.tb.gmpm.t51250129
EISBN: 978-1-62708-345-4
... in conventional presses in that it allows the die designer to examine the effects of various process variables (loads, stresses, and temperature) on the die design. Precision hot-forged gears have the same advantages over cut gears as other molded gears (cast, P/M processed, injection molded...
Series: ASM Technical Books
Publisher: ASM International
Published: 01 December 2003
DOI: 10.31399/asm.tb.cfap.t69780028
EISBN: 978-1-62708-281-5
... and metals or ceramics is that plastics can be melted at relatively low temperatures and formed into a variety of shapes. Advantage can be taken of their non-Newtonian flow behavior in selecting a suitable molding or finishing process. Atoms can be specifically selected to design a polymer with the desired...
Series: ASM Technical Books
Publisher: ASM International
Published: 30 November 2023
DOI: 10.31399/asm.tb.ceeg.t59370177
EISBN: 978-1-62708-447-5
... to the ejector rack is actuated to eject the casting from the mold.) The operator removes the foil in the pouring cup and blows out the mold of any debris in preparation for the next pour. The machine is designed for the operator to actuate two buttons, using each hand, to close the mold (designed as a safety...
Series: ASM Technical Books
Publisher: ASM International
Published: 01 December 2018
DOI: 10.31399/asm.tb.aceg.t68410215
EISBN: 978-1-62708-280-8
... with a single central sprue fed by a single stalk tube. Some larger wheels (equal to or greater than about 457 mm (18 in.) diameter) are produced with two or more sprues per wheel, with a corresponding number of stalk tubes. Typically, the tooling is designed for one wheel per mold. There are a few larger...
Series: ASM Technical Books
Publisher: ASM International
Published: 01 December 2018
DOI: 10.31399/asm.tb.aceg.t68410151
EISBN: 978-1-62708-280-8
..., Overview of Casting Processes , in this book). Part geometry may force the need for an offset parting plane. Aesthetics may encourage the designers to follow a curved parting plane transition. Although computer numerical control (CNC) machining of dies and molds makes mold manufacturing of curved...
Series: ASM Technical Books
Publisher: ASM International
Published: 01 January 2022
DOI: 10.31399/asm.tb.isceg.t59320103
EISBN: 978-1-62708-332-4
... The engineering design of the gating system is a critical process element that influences both surface quality and internal integrity of the castings. Anomalies such as laps, slag inclusions, gas cavities, sand erosion, mold spalling, and shrinkage can be avoided if gating and venting systems are properly...
Series: ASM Technical Books
Publisher: ASM International
Published: 01 December 1995
DOI: 10.31399/asm.tb.sch6.t68200437
EISBN: 978-1-62708-354-6
... Holes . . . 1) Holes in the head plate or blow plate of a core-blowing machine through which sand is blown from me reservoir into the core box. 2) Irregular shaped cavities with smooth walls produced in a casting when gas is entrapped during mold filling. The gas sources may be air, binder decomposition...
Series: ASM Technical Books
Publisher: ASM International
Published: 01 December 2018
DOI: 10.31399/asm.tb.aceg.t68410029
EISBN: 978-1-62708-280-8
... casting process include: Simpler designs, such as intake manifolds and other general-purpose castings Farm equipment and bed frames for pump sets and motor housings (with cores for the cooling fins) 4.2 Air Set or No-Bake Molding Process A variety of medium- to large-sized castings...
Series: ASM Technical Books
Publisher: ASM International
Published: 30 November 2023
DOI: 10.31399/asm.tb.ceeg.t59370021
EISBN: 978-1-62708-447-5
... fluffy and compactible. The sand is then delivered to the hoppers over the molding machines using troughed belt conveyors and gates. Molds are made, cores are set, and then they are poured. The length of the mold conveyors is designed to allow for the appropriate cooling time for a safe knockout without...
Book Chapter

Series: ASM Technical Books
Publisher: ASM International
Published: 30 April 2020
DOI: 10.31399/asm.tb.bpapp.t59290111
EISBN: 978-1-62708-319-5
... to force feedstock into a closed die with the desired shape. Effectively, the process is similar to injection molding, with less sophistication. This compression molding approach is generally reserved for large, bulky items. Blow molding is a variant where the heated powder-binder feedstock is blown...
Series: ASM Technical Books
Publisher: ASM International
Published: 01 December 2018
DOI: 10.31399/asm.tb.aceg.9781627082808
EISBN: 978-1-62708-280-8
Series: ASM Technical Books
Publisher: ASM International
Published: 01 March 2002
DOI: 10.31399/asm.tb.mgppis.t60400087
EISBN: 978-1-62708-258-7
... was it determined why the bars are different. The information from the metallographic analysis explained why the bars were cracking and breaking cutting tools. The bracket manufacturing process employs steps that run the material through normal, closely controlled forming/machining/welding operations designed...
Book Chapter

Series: ASM Technical Books
Publisher: ASM International
Published: 01 December 1995
DOI: 10.31399/asm.tb.sch6.t68200187
EISBN: 978-1-62708-354-6
... with the atmosphere, the furnace and ladle refractories, and the molding media. Proper control is necessary to minimize defects such as inclusions, porosity, hot tears, and adhering sand defects. In addition, the final properties and quality of the metal are strongly influenced by the method of melting and pouring...