1-20 of 189 Search Results for

core baking

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
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
..., and additives used in coremaking. It discusses the curing of compacted cores by core baking and the hot box processes. The article provides an overview of the core coatings, assembling and core setting, coring of tortuous passages, and cores in permanent mold castings and investment castings. It also discusses...
Image
Published: 01 December 2008
Fig. 11 Comparison of maximum recommended core length versus core diameter for baked sand cores positioned in the mold (a) at the parting line and firmly anchored at both ends, (b) at the parting line but anchored at one end only, and (c) vertical to the parting line and anchored at both ends More
Image
Published: 01 December 2008
Fig. 7 Effect of baking time and temperature on tensile strength of oil-sand cores. The dry mixture was 99% silica sand (fineness, AFS 40) and 1% cereal. Based on total weight of dry material, 1% linseed oil and 3% water were added. More
Image
Published: 01 December 2008
Fig. 8 Baking speeds of phenolic-resin-bonded versus oil-bonded sand cores More
Image
Published: 01 December 2008
Fig. 9 Effect of sand fineness on time required for baking oil-sand cores to maximum strength More
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
... in handling sand-resin mixtures for no-bake molds or cones and lists some advantages of no-bake air-set cores and molds. The article describes the process procedures, advantages, and disadvantages of gas curing and air-setting hardening of sodium silicates. It examines the members of the air-setting organic...
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
... :   Core oil M M M H G G L … P 205 400 F F H M … Self-setting resins   Furan no-bakes : G-F (furan no-bake)   High-nitrogen  furan — acid H M L M G G … 1–45 … 27 80 P G H M Steel   Medium-nitrogen  furan — acid H M L M G G … 1–45...
Image
Published: 01 December 2008
Fig. 4 A comparison of maximum recommended core length versus core diameter for baked sand cores positioned in the mold (a) at the parting line and firmly anchored at both ends, (b) at the parting line but anchored at one end only, and (c) vertical to the parting line and anchored at both ends More
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
... of the problems entailed in molding a core. At the top of each illustration, the core box is shown in section after ram-up; in the lower part, the core box has been inverted onto a plate upon which the core rests preparatory to being baked. Fig. 1 Basic principles of core molding. Figure 1...
Series: ASM Handbook
Volume: 1A
Publisher: ASM International
Published: 31 August 2017
DOI: 10.31399/asm.hb.v01a.a0006297
EISBN: 978-1-62708-179-5
... cores also is achievable. Even though they usually are cured at ambient temperature, no-bake systems are sensitive to temperature, probably with the behavior common to many chemical systems in which the reaction rate doubles for every increase in 10 °C (18 °F). Therefore, the rate of production...
Book: Casting
Series: ASM Handbook
Volume: 15
Publisher: ASM International
Published: 01 December 2008
DOI: 10.31399/asm.hb.v15.a0005355
EISBN: 978-1-62708-187-0
... shakeout vertical core knockout machine A-frame core knockout machine pressure testing automating gate removal After solidification and cooling, further processing and finishing of the castings is required. The required operations and levels of finishing depend on the process (green sand, no-bake...
Series: ASM Desk Editions
Publisher: ASM International
Published: 01 December 1998
DOI: 10.31399/asm.hb.mhde2.a0003136
EISBN: 978-1-62708-199-3
... to a tensile strength of 400 MPa (64 ksi) retains 91% strength after a typical core bake of 3 min at 345 °C (650 °F). Silver-bearing copper C11400 given the same cold reduction retains only 60% tensile strength after the same baking schedule. Fig. 1 Softening characteristics of cadmium-bearing copper...
Series: ASM Desk Editions
Publisher: ASM International
Published: 01 December 1998
DOI: 10.31399/asm.hb.mhde2.a0003172
EISBN: 978-1-62708-199-3
... Chromite sand Zircon sand Heat-cured resin binder processes Shell process (Croning process) Furan hot box Phenolic hot box Warm box (furfuryl/catalyst) Oven bake (core oil) Cold box resin binder processes Phenolic urethane Furan/SO 2 Free radical cure (acrylic/epoxy...
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
... pressure or vacuum during pouring or to provide greater permeability by a special procedure. Plaster Mold Compositions In all of the processes for making plaster molds and cores, the principal mold ingredient is calcium sulfate (gypsum). Other materials are used to enhance such mold properties...
Book: Casting
Series: ASM Handbook
Volume: 15
Publisher: ASM International
Published: 01 December 2008
DOI: 10.31399/asm.hb.v15.a0009018
EISBN: 978-1-62708-187-0
... is required for each core placed in the baking oven. An alternate method for making core 2 is shown in Fig. 15(e) . Here, the core is produced in two halves, each having a large flat face that makes the use of core driers unnecessary. The large core box opening also simplifies packing of the sand. After...
Book: Casting
Series: ASM Handbook
Volume: 15
Publisher: ASM International
Published: 01 December 2008
DOI: 10.31399/asm.hb.v15.a0005186
EISBN: 978-1-62708-187-0
.... 240 molds/h) is delivered to United Danish Iron Foundries in Frederiksvaerk, Denmark. Early adopters report man-hour per ton improvements on the order of 50%. 1965—Oil urethane no-bake binder systems are used for cores and molds. General Electric's Jim Henzel and Jack Keverian predict freezing...
Book Chapter

Book: Casting
Series: ASM Handbook
Volume: 15
Publisher: ASM International
Published: 01 December 2008
DOI: 10.31399/asm.hb.v15.a0005287
EISBN: 978-1-62708-187-0
... baked sand cores can be used Reusable cores can be made of steel, or nonreusable baked cores can be used Steel cores; must be simple and straight so they can be pulled Tolerance obtainable Poorest; best linear tolerance is 300 mm/m (300 mils/in.) Best linear tolerance is 10 mm/m (10 mils...
Series: ASM Handbook
Volume: 5
Publisher: ASM International
Published: 01 January 1994
DOI: 10.31399/asm.hb.v05.a0001306
EISBN: 978-1-62708-170-2
... are suitable only for indoor protective coatings. Baking produces finishes of higher quality that are well suited for outdoor exposure. Spray painting has several advantages over dipping, including improved control of dimensions and coating quality, and the ability to coat localized areas. However, higher...
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
... are shell molding and no-bake molding. The shell and no-bake methods are discussed in subsequent articles in this Volume. The base aggregates and types of binders are discussed in the article “Aggregates and Binders for Expendable Molds” in this Volume. Some advantages of green sand molding include...
Series: ASM Handbook
Volume: 2A
Publisher: ASM International
Published: 30 November 2018
DOI: 10.31399/asm.hb.v02a.a0006533
EISBN: 978-1-62708-207-5
... binders, including oils that are combinations of vegetable, animal, or petrochemical products. On this basis, the classification of sand castings can be: Green sand Dry sand Waterless (oil/clay-bonded) sand Baked (or heat-cured) core sand Shell (phenolic-resin-bonded) sand Chemically...