MG-PLUS series
The magnesium alloy has many excellent features having a global
attention. In the lights for environment conservation and energy
saving, the magnesium alloy is adapted in wide range of
applications such as automotive, aerospace, electric appliance,
and IT device. In spite of its outstanding features, unfortunately,
current method of MG manufacturing has issue with productivity of
the molding process. It makes MG molding business as
unprofitable production and delaying magnesium adoption.
Disadvantages of current system
1. Magnesium under melting condition react with oxygen or nitrogen and burn,
and it becomes magnesium oxide of magnesium nitride.
2. SF6 or AR gas is used for protection against burn. But especially SF6 is
hazardous to environment, and a cause of corrosion for iron metal.
3. It is difficult to block out oxygen or nitrogen completely, and injection
cylinder wear out due to magnesium oxide, magnesium nitride and Mg-Al-Fe
chemical compound. Thus maintenance cost run up and removal of sludge in
cylinder makes productivity very low.
4. Magnesium is low viscosity under melting condition and coagulation time is
very fast after filling material in the cavity.
5. Low viscosity causes leakage of material even a little worn piston ring out
and produce unstable molding. Since coagulation time is very fast, filling time
should be very fast.
6. Unstable molding and fast filling time can't maintain repeatability and an
increase of defect ratio cause unprofitable production.
Development Concept of MG-PLUS
1. Better work environment
2. Improved safety
3. Minimum inert gases
4. Minimum maintenance
5. Improved injection precision and reduced defect ratio
MG-PLUS System
1. Safe to handle Mg Ingot material, not the dangerous resin.
2. Self-sealing cylinder design- No mixing with air, no oxidized sludge to
remove.
3. Environment friendly- self-seal cylinder design requires no inert gases.
4. Plunger system- accurate metering and filling.
5. Injection cylinder seal system- no piston ring, no friction wear.
6. Small to medium size molding. (10cc to 340cc)
7. Easy temperature setting
8. Interchangeable cylinder-flexible volume with same injection rate.
9. Machine requires less energy.
10. Low running cost- few moving parts, less maintenance, increasing
productivity.
Comparison Sheet
| Operation |
MG-PLUS |
Hot Chamber |
Thixo Molding |
| Work |
Excellent |
Fair |
Excellent |
| Safety |
Excellent |
Fair |
Good |
| Maintenance |
Excellent |
Fair |
Good |
| Dissolution System |
Melt Cylinder |
Dissolution furnace |
Melt Cylinder & Screw |
| Inert Gases |
Ar (only at factory) |
Sulfur, SF6 |
Ar |
| Material |
Mg Alloy Billet |
Ingot |
Granule Pellet |
| Injection Accuracy |
Excellent |
Fair |
Good |
| Injection Speed |
2-3M/sec |
2-3M/sec |
3-4M/sec |
| Cycle Time |
Good |
Excellent |
Good |
| Shot Volume |
Good |
Excellent |
Good |
| Melt Temperature |
585-700C |
640-670C |
585-630C |
| Power Consumption |
Excellent |
Fair |
Excellent |
| Maintenance Cost |
$0.10/shot |
$0.12/shot |
$0.21/shot |
|
