Greensand Casting: Difference between revisions
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=[[Off the Shelf]] Greensand Sources= | =[[Off the Shelf]] Greensand Sources= | ||
*'''Petrobond''' - good for novices - [https://www.ebay.com/i/323763579556?chn=ps] | *'''Petrobond''' - good for novices - [https://www.ebay.com/i/323763579556?chn=ps] | ||
*Ebay - 5 lb - $20 - [https://www.ebay.com/i/163377418357?rt=nc&_trkparms=aid%3D222007%26algo%3DSIM.MBE%26ao%3D1%26asc%3D20160908110712%26meid%3D10f2fb7064984c94904bff7ee36d599c%26pid%3D100677%26rk%3D14%26rkt%3D17%26mehot%3Dag%26sd%3D251256302899%26itm%3D163377418357] | *Ebay - 5 lb - $20 - [https://www.ebay.com/i/163377418357?rt=nc&_trkparms=aid%3D222007%26algo%3DSIM.MBE%26ao%3D1%26asc%3D20160908110712%26meid%3D10f2fb7064984c94904bff7ee36d599c%26pid%3D100677%26rk%3D14%26rkt%3D17%26mehot%3Dag%26sd%3D251256302899%26itm%3D163377418357] | ||
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*One here, includes oil and bentonite - [https://www.cnczone.com/forums/casting-metals/42892-oil-bonded-green-sand-recipe.html] | *One here, includes oil and bentonite - [https://www.cnczone.com/forums/casting-metals/42892-oil-bonded-green-sand-recipe.html] | ||
=DIY= | ==Misc DIY/OS Recipes== | ||
*From Backyardmetalcasting - [https://www.backyardmetalcasting.com/greensand.html] | *From Backyardmetalcasting - [https://www.backyardmetalcasting.com/greensand.html] | ||
*Sand + bentonite, mulled - [http://www.foundry101.com/archive.htm] | *Sand + bentonite, mulled - [http://www.foundry101.com/archive.htm] | ||
==K-Bond== | |||
*'''K-bond'''- the open source oil sand - [https://www.foundry.ray-vin.com/k-bond/k-bond.htm], hint from [https://www.foundry.ray-vin.com/k-bond/k-bond.htm]. Another link to PDF of formula - [https://www.afsinc.org/sites/default/files/inline-files/k-bond%20sand.pdf]. See [[Definitive Article on K-Bond]]. | |||
=Internal Links= | =Internal Links= | ||
Revision as of 22:06, 5 June 2023
Basics
- There are 2 main Sand Casting methods, which combined make up about 40% of all casting processes: Greensand and No-Bake Sand Casting
- No-Bake uses Sand and a Thermoset Plastic Mixture of the relevant Plastic Precursors and Catalysts which cures around the sand, holding it in place, in a similar manner to Composite Materials
- Greensand Casting Can Have Various Binders which will make it either:
- Self-Hardening (Minor Overlap with No-Bake Sand Casting
- Gas Hardening
- An example is when Sodium silicate is used. Carbon Dioxide is used to "Cure" the mold after forming
- Thermohardening
- This Classification is from a Reference to a Book by a User Discussing this in the Sand Casting Wikipedia Page
- The Terms "Water Bonded" and "Oil Bonded" are also used in the context of Greensand Formulations, especially at a smaller scale
Technique
- Comprehensive diagram of all casting types - [1]. MIG Casting is not included. Binders can be clay, chemically setting binders, and polymerized oils (motor oil)
- No-Bake (airset or precision sand) casting - use a binder with sand. [2]
- Types of Binders - [3]
Off the Shelf Greensand Sources
Casting Companies
- Commercial airset sand casting - [6]
Greensand Formulas
Theory
- You Will Have:
- Sand ( Grain Size , Sand Type , etc all have their effects)
- Your Binder(s)
- In terms of non-Sodium Silicate or No-Bake
- Small Amounts of Additives for more Specialized Greensand Formulations
- Reducing Agents
- Cushioning Material / Insulating Agents
- One here, includes oil and bentonite - [7]
Misc DIY/OS Recipes
K-Bond
- K-bond- the open source oil sand - [10], hint from [11]. Another link to PDF of formula - [12]. See Definitive Article on K-Bond.