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Runsom Die casting service

Runsom provide die casting service with whole range of manufacturing process, including tool making, die casting , machining and surface finishing. Our advance inspection equipment and experienced technical team will ensure the quality of raw materials and finished parts. Our most skilled engineers with talent and unparalleled commitment guarantee your project in high industry standard. We specialize in low&high pressure die casting with various metal materials in high tolerance.

Runsom invest countless time and money in art machines and technologies, in order to provide consist and precise parts for your with less cost and producing time. Our new process combines automated monitoring with expert staff will detect process issues and correct control variable. We also improve production parts surface finish and integrity, make sure that our clients receive best products with highest quality and tolerance.

Once you need design or engineering assistance, our experienced team will optimize your tool design, try our best to improve functionality and manufacturability of your design, in order to  minimize initial cost in new projects or redesign an existing casting. Our versatility capability guarantee our competitive quotation and competent casting, no matter long or short turnround, large or small products, simple or complex design.

How die casting work

Die casting is a common manufacturing process for high volume metal parts with complex structure. Die casting takes molten mental with low melting point like aluminum, zinc, bronze, lead, tin, magnesium, copper steel, and forces it into steel molds via high hydraulic or pneumatic pressure. These steel molds also called as dies, can produce extremely complex and high tolerance parts in a repeatable process. So we can produce more metal parts in high volume, in addition, geometrically complex parts can be reproduced by this process with high repeatable accuracy degree.

In modern manufacturing industry, Runsom has produce millions of components for our customer with large volume and mass production in worldwide. Our parts are used in wide range of industrial, commercial and consumer products,such as automotive manufacturing, electronics, architecture and construction, EMI shielding, HVAC, fixtures and plumbing, furniture and industrial manufacturing, sinks and faucets, appliances, housings, fittings, toys, telecommunications and so on.

Die casting advantages

Various castable metal for customer selection,

Economical for high-volume parts producing, As all production of parts and components form in only one mold, die casting is an affordable and versatile way for high-volume metal parts production with low cost.

Excellent surface finish, die casting can produce parts with smooth or textured surfaces, paints and plating finishes. Various finishes will protect parts form corrosion and improve cosmetic appearance.

Complex geometries for design options, our versatility casting through hot chamber or cold chamber will produce any virtual shape with dimensional stability.

Most suitable for large metal parts, reduction of scrap or waste, faster production cycle time.

Runsom provide mass production of complex die casting parts with less time and lower cost, our quality management with certifications guarantee every parts quality we fabricate. We are the expert of precision die casting manufacturer at competitive cost.

Die casting Process

Die casting consist of following schedule

  1. Clamping, close die casting molds for cavities align.
  2. Injection, inject molten metal in to die with high pressure.
  3. Cooling, molten metal cool and solid in mold until it harden completely.
  4. Ejection, open die and ejector push out solidified metal shape.
  5. Trimming, remove any excess material.
  6. Finish/Secondary Processing, CNC machining, surface finish and plating to remove blister and blow holes, increase surface strength and conductivity.


Runsom use two different type of die casting machine to provide two die casting service:

Hot-chamber die casting

This process also called as gooseneck casting, which is the most popular die casting process. Hot-chamber die casting machine use pneumatic or hydraulic powered piston to force molten metal inject into the die cavity. Injection mechanism chamber is immersed in molten metal, and metal feed system control molten metal injection automotive, so it will increase parts production rate. For metal with low melting point, hot-chamber can also melt metal inside machine.

Cold-chamber die casting

Metal with high melting points always use cold-chamber die casting way, these metal need to be melted in a separate furnace to start metal casting process. Molten metal will be transfer into a shot chamber, and drive it in to die cavity by a hydraulic or mechanical piston. Cold-chamber die casting need time to transfer material form furnace into die casting machine, so this operation process has a slower rate than hot-chamber casting. But cold-chamber die casting will minimize machine corrosion due to molten metal is force into injection system directly, never need to immerse injection mechanism in molten metal.

Die casting materials

Runsom provide various type of metal casting, the following options are our main materials in die casting projects.

Bronze: There are many different varieties of bronze alloy with differing properties. The general advantages of this metal are thermally and electrical conductive, ductile and aesthetically

Lead: This is dense, soft and malleable metal with low melting point, it always used as an alloy element add to brass or bronze in did casting, in order to increase machinability.

Tin: It provide high density and extreme accuracy. In alloying usage, its main property is corrosion resistance.

Aluminum: Aluminum and its alloys are corrosion resistant, highly stable and conductive. They have low density and easy casting, these properties make these metal wide used in electrical industry.

Zinc: Zinc is high dense and ductile with excellent surface smoothness, impact resistance and castability. However it need additional coating or plating to suspect corrosion. We usually use zinc to cast fine and thin parts for mini electronic components.

Magnesium: Magnesium is a low density and high strength-to-weight ratio metal with excellent machinability. It can be cast in either hot or cold chamber, but it’s not suitable in high stress or temperature environment.

Copper: Copper is a stable, conductive, durable, corrosion and wear resistant metal. it has high melting point, so casting process will wear dies mold quickly than other metals.

Steel: Steel is high strength alloy, which is wide used in various industries.

Die casting finishes

Runsom offer multiple surface finishes for our die cast par as costumed, such as:
Chemical film
Powder coating
Wet painting

Die casting applications

Runsom provide die casting for a wide rage of industries including:

Industrial equipment
Electronic equipment
Automotive components
Connector housing
Plumbing fixtures