Graphite Mold for Glass Forming and Blowing
Graphite molds are widely used in glass forming and blowing processes due to their excellent thermal conductivity, high temperature resistance, and non-stick properties. The smooth graphite surface ensures high-quality glass products with superior surface finish.
Our glass forming molds are precision machined from fine-grain isostatic graphite, optimized for fast heat transfer and long mold life. They are used in manufacturing glass bottles, vials, optical glass, and specialty glass products worldwide.
Key Features
- Excellent thermal conductivity for fast, uniform cooling
- Smooth non-stick surface for high-quality glass finish
- High temperature resistance up to 1200C in air
- Machinable to precise dimensions and surface finishes
- Wear-resistant for long production runs
- Can be coated with diamond-like carbon (DLC) for extended life
Technical Specifications
| Parameter | Value |
|---|---|
| Material | Fine Grain Isostatic Graphite |
| Grain Size | Less than 10 microns |
| Density | 1.82 - 1.88 g/cm3 |
| Shore Hardness | 68 - 78 |
| Thermal Conductivity | 120 - 150 W/m.K |
| Max Working Temp | 1200C (glass contact) |
| Surface Finish | Ra 0.4 - 0.8 micron (polished) |
| Tolerance | +/- 0.02mm |
Applications
- Glass bottle and jar blowing molds
- Pharmaceutical vial and ampoule molds
- Optical glass pressing molds
- Glass tube and rod forming dies
- Crystal glass and decorative glass production
Why Choose Jincheng
- Fine grain graphite for superior glass surface finish
- Experience with both blank molds and blow molds
- Polished mold surfaces for minimal post-processing
- Custom machining based on your product drawings
- Fast delivery for mold replacement orders
- Competitive pricing for both prototype and production molds
FAQ
Q: How long do graphite glass molds last?
A: Typical mold life is 50,000 to 200,000 cycles, depending on glass type, forming temperature, and mold material grade.
Q: Can you make molds based on our existing samples?
A: Yes, we can reverse engineer your existing molds and produce replacements with matching dimensions and surface finish.
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