第四章 傳統鑄造方法 foundry · pdf file第四章 傳統鑄造方法 4-3...
TRANSCRIPT
4-1
Foundry Process
Green-Sand Molds
Skin-Dried Molds
Dry-Sand Molds
Loam Molds
Furan Molds
CO2 CO2
Metal Molds
Special Molds
4-2
Removable Patterns
Disposable PatternsPolystyrene
Bench Molding
Floor Molding
Pit Molding
Machine Molding
FlaskCopeDrag
Cheek
A
B
Parting SandSprue Pin
C
Polystyrene
4-3
Types of removable patterns
A.
B.
C.
Loose Piece
D.
E.
4-4
F.
G.
Pattern allowance
ShrinkageDraft
FinishDistortionShake
4-5
Disposable pattern
Pouring Basin
Sprue
Skimmer
Strainer
Riser
4-6
Blind Riser
Chills
Exothermic
Chemicals
4-7
SiO2
8~15%
Kaolinite IlliteBentonite
Synthetic Sand 3~5%
Aerate
Sand Mixer Simpson
4-8
ReclamationConditioning
Permeability
Strength
4-9
Referactoriness
Grain Size and Shape
15
61230405070100140200 270
270
6 00.0 3 0.0
12 00.0 5 0.0
20 00.0 10 0.0
30 02.0 20 40.0
40 02.5 30 75.0
50 03.0 40 120.0
70 06.0 50 300.0
100 20.0 70 1400.0
140 32.0 100 3200.0
4-10
200 12.0 140 1680.0
270 09.0 200 1800.0
04.0 30 1200.0
90.5 9815.0
9815/90.5=108
4-11
Caustic Soda
4-12
Sand Core
Green sand coreDry sand core
A
BCDEF
Core box
4-13
Chaplets
B C D E
F
Lineseed oil
DextrinGelatinized starch
PitchRosin
4-14
Furfuryl Alcohol
CO2
4-15
ScabRun-out
4-16
Jolt-Squeeze Rollover Machine
Jolt Rollover Pattern-Draw-Molding Machine
4-17
Sandslinger
Shake-out
4-18
Tumbling Mill
Wheelabrator Tumblast
Sandblast
GalvanizingPlating