A vertical cold core shooter machine is an industrial device commonly used in foundries for making sand cores, which are essential components in metal casting processes. These machines work on the cold box process, which involves the mixing of sand with a chemical binder system that hardens or cures when exposed to a specific gas catalyst (e.g., amine gas).
Discover everything you need to know about vertical cold core shooter machine and plants used to produce sand and resin cores.
Vertical Cold Core Shooter Machine And Plants Feature
Vertical Design:
The vertical configuration is designed for efficient core production, saving space and providing better ergonomics for operators.
Core Shooting System:
The machine shoots sand mixed with the binder into a core box (mold) at high pressure to ensure precise filling and compaction.
Cold Box Process:
The binder system used is typically resin-based and cures at room temperature.
A catalyst gas is introduced after the sand mixture is compacted, which hardens the core quickly.
High Precision:
These machines are engineered for making complex, high-accuracy sand cores used in casting intricate metal parts.
Automation:
Many modern machines include automated controls for consistent performance and reduced manual intervention.
Customizable:
Machines often support multiple sizes of core boxes and can be adapted to specific production requirements.
Vertical Cold Core Shooter Sand Feeding System
The Cold-Box process, unlike the Shell Moulding process, requires a mixing of sand and resin prior to injection into the core box, obtained through a specific equipment.
Sand can be dosed using different dosing systems. One of these consists of using a valve directly from the container above the mixer, but this system is not very precise. A screw conveyor is a more accurate system, while a weighing hopper dosing system is very precise, as well as a volumetric system.
Timed screw or weighing hopper systems are flexible because they allow for the creation of recipes with different amounts of sand, in order to create mixtures for shot machines of different volumes, avoiding waste of the mixture. The volumetric system allows for the same flexibility.
Different options are also available for dosing resins. These can be dosed with volumetric pumps directly from the ground level to the mixer, avoiding double transport.
Flow control systems can be used to obtain greater control, but the basic system is already very precise. Other resin dosing systems are weight-based or volumetric.
The optimal temperature for using resins is 20-25°C, but slightly lower temperatures can be tolerated. There are heating systems available for both sand and resins, useful for maintaining the ideal temperature during the production of the mixture. The sand-resin mixture can be produced with any type of mixer, but the best result is obtained with a helical blade mixer.
After mixing, the mixture is conveyed into a hopper on the moulding machine ready for entry into the cartridge or firing head.
The mixture can be transported to the core shooting machines in two ways: directly from the mixer through a motorized trolley or through a sliding hopper on a monorail and a motorized carriage. If the mixer feeds multiple machines, it is important that it is programmable to meet the needs of each one. These solutions require the entire plant to be positioned on a specific height mezzanine, but in some cases, this is not possible. In this case, the option is to install the preparation plant at ground level and use a lifting hopper and a trolley to distribute the mixture to the machines.
Vertical Cold Core Shooter Application
- Metal Casting: Producing cores for engine blocks, manifolds, pump housings, and other complex castings.
- Automotive Industry: Manufacturing engine blocks, cylinder heads, and other complex castings.
- Aerospace: Creating intricate components for high-performance alloys.
- Industrial Equipment: Producing molds for pumps, valves, and large machinery parts.
Conclusion
Vertical Cold Core Shooter Machine is a specialized industrial device used in the foundry industry for producing sand cores. These cores are essential for shaping internal cavities or complex features in metal casting processes. The “vertical” configuration refers to the machine’s design, where the core shooting and curing processes occur in a vertical orientation.