Custom Die Casting Parts Manufacturer

As a leading casting parts supplier, Yijin has specialized in precision casting, die casting, vacuum casting, and rapid metal casting (aluminum, magnesium, zinc & steel) for over 20 years.

Offering custom casting parts and services worldwide with high quality and less cost.

Aluminum die castings
Die casting plant processes aluminum castings

Why Die Casting?

1. Cost Effective

The casting technique is suitable for making prototypes and producing parts in either small batches or large scales.

It’s cost-effective since there is less equipment investment and the material price is relatively low.

Compared with the traditional manufacturing process (turning, milling, wire cutting, electrolysis, etc) that involves material deduction (and therefore waste), die casting has much higher efficiency with almost no material waste.

Casting turns raw materials into liquids at a high temperature. The melted materials are then poured into a mold to form the desired shape.

That means the metal scrap can be melted and reused, so there are no waste casting materials.

Besides that, production efficiency is greatly improved with simplified manufacturing processes.

Generally speaking, the die-casting parts require little post-processing, which saves labor costs, power costs, and materials.

yijin hardware casting parts workshop

2. Highly Flexible

Metal casting techniques can create parts in various sizes and complex shapes.

The size of casting parts can range between a few millimeters and several tens of meters, while the weight can vary from a few grams to hundreds of tons.

Casting parts can also have complex inner cavities such as cylinder blocks.

The shapes and sizes of metal casting parts, especially precision casting parts, are very close to the desired machine parts, and therefore little cutting is required afterward, saving the materials and processing time.

Casting can be applied to a wide range of alloys, such as copper, aluminum, magnesium, steel, iron, etc.

Besides that, casting is the only way to process brittle metals, such as iron.

3. Customize on Demand

At Yijin, you can order custom die-casting parts tailored to your needs in a straightforward process:

  1. Customer requests via online message or phone call
  2. Prior communication to discuss your needs
  3. Quotation based on your requirements
  4. Order and price confirmed by customer
  5. Second round communication to discuss project details
  6. Casting manufacturing process was confirmed by the customer
  7. Production mold developed by the manufacturer (if needed)
  8. Casting part sample was confirmed by the customer
  9.  Production & shipment (with inspection throughout the process)
  10. After-sales service if anything goes wrong
custom die castings process 1
custom die castings process 2

4. Production Capacity

Yijin is equipped with full and advanced production facilities to cater to your specific needs for custom die-casting parts. The major equipment includes the following:

  • 88T Lijin zinc alloy die-casting machine
  • 138T JICun zinc alloy die-casting machine
  • 160T Lijin zinc alloy die-casting machine
  • 160T Lijin aluminum alloy die-casting machine
  • 300T Yimi aluminum alloy die-casting machine
parts testing group yijin

5. Straightforward Production Flow

Generally, the casting part production is processed through several standardized and strict steps:

  1. Order confirmed by the manufacturer
  2.  Manufacturing process confirmed by the customer
  3. The casting part sample was confirmed by the customer
  4. Casting parts production
  5. Quality inspection during production
  6. Casting parts shipment

6. Quality Management

The whole casting manufacturing process is under strict quality control. The quality of your casting parts is ensured in a variety of ways:

  • ISO 9001 Certified Factory
  • ISO/TS 16949 Quality Management System
  • TQM (Total Quality Management)
  • SPC (Statistical Process Control)
  • COQ (Cost of Quality) Management

Casting Products Examples

Check out the casting part gallery to see our die-casting part examples and production capabilities.

custom die casting parts for cars

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stainless steel die casting parts

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stainless steel precision die casting parts

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Stainless steel precision casting parts

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Cast aluminum auto parts

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Zinc die casting processing

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Types of Die Casting & Manufacturing Process Explained

There are various types of die casting to create large or small casting machine parts, casting engine parts, and other custom precision cast parts for your specific needs.

Our specialists have decades of experience in manufacturing casting parts and are knowledgeable about all kinds of casting operations. Learn the most popular casting manufacturing process and discover the best solution for your project.

1. Sand Casting

Sand casting parts are produced in a sand mold. Therefore, this manufacturing process is also known as sand molded casting. Steel, iron, and most of the non-ferrous alloy casting parts can be created with sand casting.

Sand casting has been the most basic operation for a long time since the materials used are cheap and easy to obtain, the mold is easy to make, and the process is flexible enough to handle single-piece orders and production in small batches or large scales.

Sand Casting Process Diagram

Sand Mould Casting PFD

Sand Casting Advantages

  • Can deal with complex shapes and cavities, such as boxes, beds, frames, etc
  • Can create casting parts ranging from a few grams to hundreds of tons
  • The shape and size of sand casting parts are close to the final parts with little post-processing required

2. Lost-Wax Casting

This casting process can present the finest details of metalwork and therefore is widely used in the field of sculpture, jewelry processing, dentistry, and industrial restoration. The products for lost-wax casting are often difficult to manufacture because of their intricate designs.

Lost-Wax Casting Process Diagram

lost wax casting

Lost-Wax Casting Advantages

  • Can produce complex shapes and subtle patterns
    Jewelry can be molded at one time, saving time and labor costs
  • Good surface finish with few defects, reducing the polishing workload and material waste
  • Can produce various blanks in batches with a streamlined production process, convenient for production management and quality control

3. Pressure Casting

In the pressure casting process, molten or semi-molten metal materials are injected into a mold at high speed, which is crystallized afterward under pressure. Generally speaking, the injection pressure is 30 – 70 MPa, the filling speed is around 0.5 – 50 m/s, and the filling time is 0.01 – 0.2 s.

Pressure Casting Process Diagram

pressure casting

Pressure Casting Advantages

  • Highly efficient with a high level of mechanization and automation
  • Can produce thin-wall casting parts with complex shapes
  • The minimum wall thickness of zinc alloy can achieve 0.3 mm
  • The minimum wall thickness of aluminum alloy can achieve 0.5mm
  • The minimum casting hole diameter can achieve 0.7 mm
  • Can achieve high dimensional accuracy and small surface roughness values
  • The dimensional tolerance level can reach CT3 – CT6
  • Surface roughness is within Ra 0.8 – 3.2 μm
  • Parts can be embedded in casting molds, saving time and materials
  • Can simplify the manufacturing process by removing the component assembly

4. Low-Pressure Casting

Low-pressure die casting (LPDC) refers to the manufacturing process where the molten metal slowly fills the die and solidifies. It relies on the low pressure (0.06-0.15MPa) on the metal surface which is produced by compressed air in the crucible placed above (as the diagram shows).

Low-Pressure Casting Process Diagram

low pressure casting process

Low-Pressure Casting Advantages

  • Good feeding and compact casting structure
  • Can create casting parts with big sizes, thin walls, and complex shapes without a riser
  • High metal yield rate (95%)
  • No pollution and easy-to-implement automated production
  • Can be used in various casting molds (such as metal & sand molds) and alloys due to its adjustable pressure and pouring speed
  • The metal liquid is stable with no splashing since it is bottom injected, avoiding gas inside and scouring to affect the casting success rate
  • Good for creating thin-wall casting parts since it produces dense structure, clear outline, and smooth surface with great mechanical properties
  • No feeding riser with improved metal utilization rate (90% – 98%)

5. Centrifugal Casting

Centrifugal casting injects molten metal into a high-speed rotating mold where the molten metal spreads along the inside mold wall and solidifies after cooling to form the casting parts.

With the nature of centrifugal casting being centrifugal motion, it helps fill the mold wall in a radial direction and form the surface of the casting parts.

A cylindrical hole can be obtained naturally without a core.

This manufacturing process removes gas and other inclusions in molten metal with a positive effect on metal crystallization, improving the mechanical properties of the casting parts.

Centrifugal Casting Process Diagram

Centrifugal casting process a

Centrifugal casting process b

Centrifugal Casting Advantages

  • Good mechanical properties. The slag, gas spot, and other inclusions are concentrated on the inner surface of the casting parts, leaving the inner parts of the components in good condition with no porosity, shrinkage, slag and other defects.
  • Doesn’t require a gating system
  • No consumption of molten metal at risers

6. Permanent Mold Casting

Permanent mold casting refers to the casting process where molten metal fills the mold by the force of gravity and forms the casting parts after cooling and solidification.

Permanent Mold Casting Process Diagram

Permanent Mold Casting process

Permanent Mold Casting Advantages

  • High thermal conductivity and heat capacity with fast cooling
  • Compact mechanical structure with high stability (15% higher than sand-casting parts)
  • Higher dimensional accuracy with lower surface roughness
  • Less dust and harmful gas emissions during manufacturing

7. Vacuum Die Casting

Vacuum die casting is an advanced casting process that can help significantly reduce (if not eliminate) the pores and dissolved gases in the die-casting parts. This is realized by discharging the gas of the mold cavity during the manufacturing process. The vacuum die-casting parts have improved mechanical properties with excellent surface quality.

Vacuum Die Casting Process Diagram

Vacuum Die Casting process

Vacuum Die Casting Advantages

  • Greatly reduced porosity
  • Good mechanical properties with high hardness* and improved elongation**

* The aluminum-magnesium casting parts produced by vacuum die casting can be processed by welding, heat treatment and other post-processing techniques. Their performance at room temperature has also been noticeably improved.

** The elongation of die-casting parts has been increased from 8% to more than 16%.

Vacuum Die Casting Examples

  • AM60B magnesium alloy automobile wheel (produced by die casting on a cold chamber die casting machine)
  • AM60B magnesium alloy automobile steering wheel (produced by die casting on a hot chamber die casting machine with a locking force of 2940kN)

8. Squeeze Casting

Squeeze casting is a casting technique where molten metal is solidified under mechanical pressure in closed dies to create casting parts. The manufacturing process is also called liquid die forging.
During the squeeze casting process, high pressure is applied to the material as it cools until it’s formed the desired casting shape after crystallization and solidification.

Squeeze Casting Process Diagram

Squeeze Casting process

Squeeze Casting Advantages

  • No gating system which produces material waste
  • Squeeze casting parts can be heat treated
  • Good feeding effect with fine grains and dense structure
  • Less cost, longer service life and higher material utilization rate

9. Cavityless Casting

The cavityless casting process adopts an expendable pattern that gets burnt and evaporated after the molten metal is poured into the mold.

Cavityless casting is used to combine paraffin or foam models (in similar sizes and shapes) to cast parts into clusters, which are brushed with refractory paint, dried, and buried in dry quartz sand.

The molten materials are poured into the molds which evaporate after the casting parts are created.

This is a new casting technique that creates the part by forming the model itself after cooling.

Cavityless Casting Process Diagram

Cavityless Casting parts manufactured by yijin hardware

Cavityless Casting Advantages

  • High precision with no sand core, saving production time
  • Flexible in design with no parting surface
  • Clean manufacturing process with no pollution
  • Less investment and costs

10. Continuous Casting

Continuous casting is an advanced casting method in which the molten metal is poured into a water-cooled mold and the solidified castings are continuously drawn from the other open end. With continuous casting, you can get casting parts at any specific length.

Continuous Casting Process Diagram

Continuous casting process

Continuous Casting Advantages

  • Compact structure and good mechanical properties due to its rapid cooling
  • No riser of the gating system on the casting, so no need to cut the head and tail of the casting during rolling, saving time and materials
  • Simplified process without modeling process, saving labor costs
  • Less production area is required
  • Can achieve high mechanization and automation in production
  • Improved production efficiency with continuous casting and rolling in ingot casting