Paper Casting Runner is a gating system component used in the casting process, usually made of pulp or fiber material. It guides the molten metal into the mold cavity during the casting process, ensuring that the molten metal can smoothly and evenly fill the mold, thereby reducing the occurrence of casting defects.
Features of Paper Casting Runner:
- Environmental protection: Paper runners are made of degradable pulp or fiber materials and are environmentally friendly.
- Lightweight: Compared with traditional sand runners, paper runners are lighter, easier to carry and install.
- Reduce cleaning work: Paper runners can be removed by burning or natural degradation after casting, reducing the cleaning process.
- Improve casting quality: The smooth surface of the paper runner can reduce the resistance of the molten metal flow and reduce the occurrence of defects such as pores and slag inclusions.
Application Scenarios:
Paper runners are widely used in precision casting, lost foam casting and other processes, especially in occasions with high requirements for casting surface quality.
Manufacturing Process:
- Material selection: High-strength, high-temperature resistant pulp or fiber materials are usually selected.
- Molding: Press the pulp into the required runner shape through the mold.
- Drying: Dry the molded paper runner to ensure its strength and stability.
Usage steps:
- Design the runner system: Design a suitable runner system according to the shape and size of the casting, including straight runner, cross runner and inner runner.
- Install the paper runner: Install the paper runner into the mold according to the design drawing to ensure its accurate position.
- Pouring molten metal: Inject the molten metal into the mold cavity through the paper runner.
- Cooling and cleaning: After the molten metal cools and solidifies, remove the paper runner for subsequent cleaning and processing.
Advantages:
- Improve production efficiency: The use of paper runners can reduce the cleaning time during the casting process and improve production efficiency.
- Improve casting quality: The smooth surface of the paper runner can reduce the resistance of the molten metal flow and improve the surface quality of the casting.
- Environmental protection: Paper runner is degradable, reducing pollution to the environment.