Production Capability
Our Core Technology
Pouring.
As a professional casting foundry for more than 20 years, Teamco is capable of providing worldwide customers solutions and services of good quality machined metal parts in diversified applications, such as Oil & Gas, industrial, mechanical parts, building and marine hardwares, etc. Sand casting is our core business and we have production bases in both Taiwan and Thailand. We produce castings according to customer drawing specifications. Our engineering team evaluates and designs the patterns after receiving customer drawings.
The casting patterns are designed to ensure the accuracy of the final product and the quality of the finish. The main concept includes enhancing the solidification and casting process reliability and reducing costs related to tooling and production. Our engineering design team employs software (Solidworks / SolidCast) to observe the follow of steel into the mold to avoid turbulent flow and producing rapid fill. Issues or limitations such as potential of shrinkage or porosity can also be identified. Quality of sand greatly affects quality of casting usually measured by features such as refractoriness, cohesiveness, permeability and collapsibility.
Sand Casting
Pattern Design
The casting patterns are designed to ensure the accuracy of the final product and the quality of the finish. Our engineering design team employs software (Solidworks / SolidCast) to observe the follow of steel into the mold to avoid turbulent flow and producing rapid fill. Issues or limitations such as potential of shrinkage or porosity can also be identified . The designer will make patterns for cores when cavities are required in the product.Pattern Making
A pattern, which is physical model of casting, is used to make the mold. Each half of the pattern is put into the flask (metal frame), the top half is known as a cope and the bottom half is known as a drag. The sand mold is formed by packing sand into each half of the mold around the pattern. The pattern includes a gating system that delivers liquid metal to the mold cavity and also regulates the metal speed. This system includes parts such as pouring cup, sprue, runner, gate and riser.Sand Mold Making
The top and bottom halves of the mold flask are known as "cope" and "drag", separated by a parting line. The mold flask is used as container for holding the mold which designed as two halves to help in the process of mold making. The sand is poured and packed onto the pattern in the flask to create the mold. The sand will be hardened by injecting into the CO2 gas. Once the sand hardens, it is time to remove the pattern from the sand-filled flask.Pouring
The metal is melted in the furnace and then ladled and poured into cavity of the sand mold, which is formed by the pattern and creates an exact replica of the original object. Enough molten metal must be poured to fill the entire cavity and all channels in the mold. The gating system carries out the process by the using tools like sprue, gates, runners and risers. The risers help releasing gases through vents and then further enhance solidification process.Shakeout & Sand Moving
After the metal solidifies and cools, then it is ready to be shaken and cleaned of excess sand. Once removed, the casting will likely have some sand and oxide layers stuck to the surface. Then it is necessary to shake the sand and casting out of the flask performed by a vibrating machine.Ingate Grinding & Polishing
The material from channels in the mold solidifies and attaches to the casting during cooling. The excess material (such as gates or risers which cannot be removed by sand blasting) must be trimmed from the casting either manually via cutting or sawing, or using a trimming press. The casting may be polished or finished to provide a functional surface for its final application.Heat Treatment
For the steel casting to have a stronger structure, the heat treatment is usually applied. It is a method of controlled heating and cooling of metals to alter their mechanical and physical properties without changing the product shape. The technique involves annealing, normalizing, hardening, quenching and tempering. It is for the casting to achieve the required mechanical properties.Sand Blasting
This is to thoroughly clean the surfaces both interior and exterior. It is an operation of forcibly propelling a stream of abrasive material against a surface under high pressure to remove the surface contaminants such as scale, flashing, burrs, etc. Sand is the most commonly used abrasive material. After the casting is clean, then the casting is off for inspections, tests, treatments, and machining if needed.Here are photos of our sand casting process
