Graphite Mold for Glass Pressing
Product Overview
Jincheng graphite molds for glass pressing are precision-machined graphite dies designed for press-and-blow glass container manufacturing, including bottles, jars, and glassware. These molds provide excellent thermal conductivity and non-stick properties for high-quality glass forming.
Our glass pressing molds are manufactured from fine-grain isostatic graphite that withstands the high temperatures and repeated thermal cycling of glass forming processes. Custom mold designs and cavity shapes are available to match different glass container designs and press machine configurations.
Key Features
- Excellent thermal conductivity for uniform glass cooling and consistent forming
- Non-stick surface to prevent glass from sticking to the mold surface
- High temperature resistance up to 1200°C for glass forming temperatures
- Good thermal shock resistance for repeated press cycles
- Precision machined cavity for accurate glass container dimensions and surface finish
- Custom mold designs for various glass container shapes and sizes
- Long mold life compared to cast iron or steel molds for glass forming
- Easy to machine and modify for custom glass designs and prototype work
Technical Specifications
| Parameter | Value |
|---|---|
| Material | Fine grain isostatic graphite |
| Density | 1.75 - 1.85 g/cm3 |
| Shore Hardness | 60 - 75 HS |
| Flexural Strength | 50 - 70 MPa |
| Compressive Strength | 80 - 120 MPa |
| Thermal Conductivity | 100 - 130 W/m·K |
| Max Working Temperature | 1200°C (in contact with molten glass) |
| Cavity Tolerance | ±0.02 - ±0.05 mm |
| Surface Finish | Ra 0.4 - 1.6 um (polished) |
| Mold Size | Custom per glass container design |
Applications
- Glass bottle manufacturing for wine bottles, beer bottles, and beverage containers
- Glass jar production for food jars, cosmetic jars, and pharmaceutical containers
- Glassware forming for drinking glasses, bowls, and decorative glass items
- Glass pressing prototypes for new glass product development and design validation
- Specialty glass manufacturing for custom glass containers and art glass
- Glass mold repair and maintenance for glass container plants
Why Choose Jincheng Graphite Molds?
- Glass-forming-grade graphite optimized for glass pressing and blowing applications
- Precision CNC machining with accurate cavity dimensions and polished surfaces
- Experience with various glass container designs and press machine configurations
- Custom mold design based on your glass container drawings and press specifications
- Competitive pricing as a direct graphite mold manufacturer
- Fast delivery - standard molds within 1 week, custom within 2-3 weeks
- Technical support for mold design optimization and glass forming process improvement
- Global shipping to glass container manufacturers and glassware producers worldwide
Frequently Asked Questions
Q1: How long do graphite glass molds last?
A: Mold life depends on glass type, forming temperature, and production volume. Under typical glass bottle manufacturing conditions, graphite molds last 100,000-500,000 cycles before needing refurbishment or replacement.
Q2: Can you manufacture molds based on my glass bottle drawings?
A: Yes, we manufacture custom molds based on your glass container drawings and press machine specifications. Please provide your bottle drawings or existing mold samples for quotation.
Q3: How do graphite molds compare to cast iron molds for glass forming?
A: Graphite molds provide better surface finish, longer life, and easier release compared to cast iron molds. However, graphite molds are more expensive upfront. For high-volume production, the longer mold life typically justifies the higher initial cost.
Q4: Do you offer mold refurbishment services?
A: Yes, we offer mold refurbishment services including re-machining and re-polishing of worn mold surfaces to extend mold life and maintain glass quality.
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