Heat Treatment Jigs - Sand Casting
Advantages of Sand Casting
Sand casting offers high cost-performance and is suitable for relatively small production runs. It provides high design flexibility, allowing the creation of complex shapes. Various materials can be used, and with appropriate heat treatment, optimal performance can be achieved. Using sand casting products allows for efficient production while minimizing initial investment costs.
Sand Casting Manufacturing Process
The manufacturing process of sand casting includes the following steps:
| No | Process | Description |
| 1 | Pattern Making | Create models using wood or resin. |
| 2 | Mold Making | Create sand molds using the models. The mold consists of two halves. |
| 3 | Molding Preparation | Combine the sand molds and prepare for casting. |
| 4 | Casting | Pour molten metal into the sand mold. |
| 5 | Cooling | Cool and solidify the poured metal. |
| 6 | Mold Breaking | Break the sand mold to extract the casting. |
| 7 | Finishing | Remove excess material from the casting and finish it. |
Comparison of Materials Used in Sand Casting
Comparison between materials used in sand casting and stainless steel welded jigs:
| Item | Stainless Steel Welded Jig | Sand Casting Jig |
| Base Material | SUS304, 310S, etc. | SCH13/HH, SCH21/HK30, SCH22/HK40, etc. |
| Structure | Mixed base material, weld metal, heat-affected zone | Uniform |
| High-Temperature Cracking | Prone to cracking at welds | Less prone to cracking if no casting defects |
| Design Flexibility | Limited design freedom compared to casting | High design flexibility with sand casting |
| Wood/Metal Mold | Not required | Required |
Heat Treatment Furnaces Using Sand Casting Products
Sand casting products are used in various heat treatment furnaces, such as:
- Tray Pusher Furnace: Transports products using a pusher mechanism. Suitable for continuous heat treatment and mass production.
- Roller Hearth Furnace: Transports products on rollers inside the furnace. Suitable for continuous heat treatment and mass production.
- Batch Furnace: Involves batch processing with horizontal furnaces, suitable for flexible manufacturing of small lots with multiple varieties.
- Pit Furnace: Vertical furnace suitable for deep heat treatment, also flexible for small lot production with multiple varieties.
Comparison of Sand-Casting Technology with Other Technologies
Sand casting technology is relatively simple for mold creation, making it flexible for small-lot production of various types. Especially for large trays, sand casting can be a cost-effective method. By selecting heat-resistant materials, it is possible to design and manufacture suitable trays for heat treatment processes.
| Item | Sand Casting Technology | Lost Wax Precision Casting Technology | Welding and Fabrication Technology |
| Large Trays | ◎ | △ | 〇 |
| General Trays | 〇 | 〇 | 〇 |
| Baskets | × | 〇 | 〇 |
| Grids | × | 〇 | 〇 |
Consultation on Sand Casting
For consultations regarding sand casting, please contact TWC. We offer optimal solutions leveraging our extensive experience and expertise. Feel free to reach out with any questions or for quotations.
