With the expertise of Asahi Yukizai Corporation, Japan, AMM has more than 700 formulations of Resin Coated Sand suiting every business application. We use specific resins with high quality silica, quartz and artificial sand to address problems faced by users (Solid and Hollow Cores/Moulds), and are continuously striving to make a win-win solution for both.
AMM strongly believes in customization. Hence AMM can supply “CUSTOM-MADE Resin Coated Sand” based on customer requirements.
AMM has adopted strong & robust systems for procuring of raw materials like sand, resin etc. The characteristics of high quality sand used by AMM are as follows:
Silica | Quartz (Under Development) | Artificial (Under Development) |
---|---|---|
Silica content >99% | Silica Content >99.51% | Alumina content >60% |
Clay content <0.1% | Clay content <0.05% | Clay content = 0% |
Semi-Angular | Angular | Round |
AFS 35 - 75 | AFS 35 – 75 | AFS 35 – 75 |
However, only sand is not sufficient to solve all the problems and fulfil the challenges faced during the casting process. To address the defects, AMM uses different types of solid phenolic resins imported from the plants of Asahi Yukizai Corporated located in Japan & China.
Resins | Solid Cores | Hollow Cores |
---|---|---|
General Resin | Basic Properties for Binding | Basic Properties for Binding |
High Strength | Low Gas | Increased Wall Thickness for Uniformity |
Anti Sand Fusion | Excellent Surface Finish | Excellent Surface Finish |
Low Expansion | Lower Veining | Lower Veining |
High Melting Point | Good Filling | Low Gas and Reduced Wall Thickness |
Anti Peel Back | No Peel Back | No Peel Back |
and many more…
About Our Resin Coated Sand
Resin coated sand (Resin Coated Sand) is pre-coated sand which is used in shell casting and finds application in casting of products calling for high precision and better surface finish. Basic raw materials used are silica sand, resin (i.e. Phenol Formaldehyde) and hexamine hardener. The material is used to provide smooth surfaces and precise dimensions of the components manufactured. Resin coated sand is primarily used in casting molds and cores using the shell casting process.
Resin coated sand finds its application in the casting of auto components such as, engines, cylinders, brakes, chassis, pistons, cam follower, camshafts; hydraulic industry, irrigation pumps, submersible pump etc.
AMM Resin Coated Sand is being continuously developed and improved with a goal of having 0% defects in castings.
Some of the prominent problems faced by foundaries:
- Gas Defects
- Sand Fusion
- Surface Finish
- Collapsibility or Shake out at the time of De-coring
- Strength and many more
Properties | Al. Castings | Iron Castings | Steel Castings |
---|---|---|---|
Flowability | Excellent | Excellent | Excellent |
Collapsibility | Good | Good | Good |
Gas Defects | Lowered | Lowered | Lowered |
Surface Finish | Excellent | Excellent | Excellent |
Strength Type | High | High | High |
Lower | Lower | Lower | Lower |
Wall Thickness | Uniform | Uniform | Uniform |
Expansion Type | Lower | Lower | Lower |
Need of Coating | Can be avoided | Can be avoided | Can be avoided |
AFS Range | 35 – 75 | 35 – 75 | 35 – 75 |
Indicative Data for Reference
Indicative Data for Reference
Item | AMM-Resin Coated Sand | Other Indigenous Resin Coated Sand |
---|---|---|
Bending Strength | 70 kgf/cm2 | 54 kgf/cm2 |
LOI | 2.6% | 4.4% |
Gas Quantity | 15 cc/g | 22 c/g |
Flowability
Item | AMM-Resin Coated Sand | Other Indigenous Resin Coated Sand |
---|---|---|
Shell Core Weight | 46.6 g | 44.3 g |
Shell Core Volume | 30 cm3 | 30 cm3 |
Packing Density | 1.55 g/cm3 | 1.48/cm3 |