China Die Casting Manufacturers Suppliers Factory - Die Casting Made in China

Your Professional Die Casting Supplier

Qingdao Hailong Machinery Group Co., Ltd., is a national high-tech manufacturer specializing in automotive dies, stamping parts, fixtures, jigs, vehicle cabs, truck bodies, and special vehicles. Our products are widely used in automotive OEM, heavy industry, and transport equipment markets across Europe, America, the Middle East, Japan, and South Korea.

Full In-House Production Chain

We cover the full process from mold design, stamping, welding, coating to final assembly, ensuring stable quality and delivery control.

Strong Engineering Capability

With experienced technicians and advanced R&D systems, we provide precise design, process optimization, and technical support for complex projects.

Advanced Equipment

We operate large CNC machines, stamping lines, laser cutting systems, and over 50 testing devices to ensure accuracy and product reliability.

Certified Quality System

We are certified with IATF 16949, ISO9001, ISO14001, and ISO45001, ensuring compliance with global automotive and industrial standards.

Engine Block Casting
Cast Engine Block | High Strength · Precision · High Temperature & Pressure Resistance · Excellent Air Tightness. Core Position: Core bearing component of engine power system, suitable for passenger
Gearbox Housing Parts
Cast Transmission Housing | High Strength · Precision · Reliable Sealing · Transmission Adaptation. Core Position: Core bearing component of transmission power transmission, suitable for passenger
Clutch Casing Parts
Cast Clutch Housing | High Strength · Precision · Accurate Positioning · Reliable Sealing. Core Position: Core bearing and protective component of clutch system, suitable for passenger cars,
Die Cast Door Frame
Die-Casting Door Frame | Lightweight · High Strength · Precision · Sealing Adaptation. Core Position: Core bearing and protective component of automobile doors, suitable for passenger cars,
Automotive Water Pump Housing
Automobile Water Pump Housing | High Performance · Precision · Corrosion Resistance · Efficient Cooling. Core Position: Key component of the automobile engine cooling system, suitable for passenger
Oil Pump Casing
Small Oil Pump Housing | High Performance · Precision · Corrosion Resistance · Stable Oil Delivery. Core Position: Key component of small oil pumps, suitable for various small mechanical equipment,
Air Conditioning Compressor Housing
Air Conditioner Compressor Housing | Pressure-resistant Sealing · High Precision · Core Structural Part of Refrigeration System. Core Position: A core pressure-bearing component solution for
Small Structural Components
Small Structural Components | Lightweight · High Precision · Strong Adaptability · High Reliability. Core Position: Core bearing and connecting components for various equipment, suitable for

Specification

Material Grade	HT250/HT300 Gray Iron; QT500/QT600 Ductile Iron; A356/ADC12 Aluminum Alloy
Adaptable Displacement	1.0L-16L (Larger displacement customizable)
Number of Cylinder Bores	3-cylinder, 4-cylinder, 6-cylinder, 8-cylinder, 12-cylinder
Key Accuracy	Cylinder Bore Roundness ≤0.008mm; Crankshaft Hole Coaxiality ≤0.015mm; Flatness ≤0.01mm/m
Temperature Resistance	≥450℃ (Standard); ≥550℃ (High-temperature Customization)
Pressure Resistance	≤18MPa (Burst Pressure)
Air Tightness Pressure	≥1.0MPa
Machining Allowance	2-3mm (Key Surfaces); 1.5-2mm (Non-key Surfaces)
Service Life	≥8 Years (Normal Working Conditions); ≥6 Years (Harsh Working Conditions)

Advantages of Die Casting

Complex Thin-walled Parts

Aluminun die casting can manufacture complex-shaped and light components but with an excellent strength-to-weight ratio, giving it an edge over other metal molding castings and investment castings.

High Mechanical Properties

Die casting products feature excellent mechanical properties. As the liquid metal solidifies under high pressure, the product appears to be fine, compact, and crystalline. Die casting parts are rigid with high hardness and strength.

High Dimensional Tolerance

Die casting produces parts with high durability and dimensional accuracy. Even when exposed to harsh conditions, the parts maintain their dimensional accuracy over time. As a result, die casting is used in fabricating complex and internal parts of machines that require high standards of precision and accuracy.

Smooth Surfaces

Die casting parts have a smooth, consistent crystalline surface. Die casting process alloys molten metal alloy to fill up the dies and create the exact shape. Therefore, provided the die is well shaped and the process is in the right condition, the parts will be fine and smooth.

Cost-Effective for Mass Production

Since the surface of die castings is often smooth with excellent mechanical features, die-cast parts often require less machining. In some cases, no machining at all. As a result, there is less need to spend on secondary operations.

Applications of Die Casting

Aerospace

The aerospace industry uses metal casting to manufacture aircraft engine components like housings and brackets using aluminum alloys (e.g., ADC12, A380) and magnesium alloys (e.g., AZ91D).

Automotive

The automotive industry uses the manufacturing process to make engine components like cylinder heads, transmission housings, blocks, and body parts such as wheel rims and door handles. Examples of automotive die casting materials used in the industry include aluminum alloys (e.g., ADC12, A380), zinc alloys (e.g., ZAMAK), and magnesium alloys (e.g., AZ91D).

Electronics

It is applicable in making electronics components such as connectors, heat sinks, and housings using aluminum alloys (e.g., ADC12, A380), zinc alloys (e.g., ZAMAK), and magnesium alloys (e.g., AZ91D). The manufacturing process can precisely make parts with complex details which are common to the electronics industry.

Consumer Products

Consumer products such as kitchen appliances, power tools, and other hardware are made using die casting process using aluminum, zinc, and tin alloy. Die casting offers high productivity, mass production, and cost-effectiveness, which are important in manufacturing these products.

Construction

The construction industry makes use of the die casting process in making hardware like hinges, window frames, and fixtures. The manufacturing process can produce parts with complex shapes hence it is important when functions and aesthetic appeal are important.

Materials Used in the Die Casting Process

Magnesium
Magnesium alloy die casting is one example as it can make strong and lightweight parts, as well as some of the thinnest sections possible thanks to the melt’s low viscosity.

Zinc
Zinc is used where strength isn’t a priority as it’s a more affordable material and easy to work with. It’s also strong enough to make parts like enclosures and toys.

Copper
Copper isn’t used much in die casting because the high temperature could induce more thermal shock and it could crack. If you’re set on die-casting copper, you have to handle it very carefully and use a high-pressure process.

Pewter
Pewter is a soft alloy that combines other materials. It’s mainly tin, but also has traces of copper and bismuth. It’s used for decorative objects and is easy to die cast in low-pressure equipment.

Aluminum

Aluminum provides highly precise parts that range from moderately strong to very strong.

Lead

Lead has seen a significant reduction in use, but it’s still critically important for manufacturing (ICE) automotive battery parts, particularly terminals.

Tin-Based Alloys

Similarly, tin-based alloys are seen less these days, but the need does arise from time to time. They cause very low wear and stress on tools because of the low viscosity and melting point.

Differences Between Forging and Die Casting

Differences	Forging	Die Casting
Process	Involves shaping the metal by applying compressive forces	Injection of the metal in a molten state into a mold under pressure
Material	Suitable for ferrous and non-ferrous metals e.g., steel and aluminum	Suitable for only non-ferrous metals like aluminum, zinc, magnesium
Mold Material	Does not require a mold. But it uses a die	Steel molds
Production Speed	Slower	Faster
Tolerance Control	Moderate tolerance	High tolerance control due to the precision mold manufacturing process
Final Part Properties	Improved mechanical properties due to the forging process	Mechanical properties depend on the casting material

Ordering Process

Inquiry - quotation - communication - order confirming - deposit payment - production - testing and debugging - balance payment - packing - delivery - customer receiving - after service.

Packaging and Shipping

Packaging	Wrapped with anti - rust paper, bubble film, and packed in export cartons or wooden cases.
Shipping	Shipping by sea, by air, by express are acceptable. According to your requirements.

Our Factory

Our Certificates

IATF 16949, ISO9001, ENVIRONMENTAL MANAGEMENT SYSTEM CERTIFICATION, NSYSTEM CERTIFICATION

FAQ

Q: What are the most common types of metal casting processes?

A: The most common casting processes include sand casting, die casting, investment casting, permanent mold casting, centrifugal casting, plaster casting, and vacuum casting. Each method offers unique benefits for part complexity, volume, and material requirements.

Q: How has casting technology improved with modern advancements?

A: Modern casting uses automation, 3D modeling, CNC machining, simulation software, and real-time monitoring. These advancements enable higher precision, tighter tolerances, quick defect detection, and greater efficiency throughout the entire casting process.

Q: What metals are commonly used in casting and why?

A: Common metals for casting are aluminum, iron, carbon steel, stainless steel, copper alloys, magnesium, nickel alloys, and zinc. Selection depends on application needs like strength, corrosion resistance, weight, and required detail or volume.

Q: What is the difference between die casting and sand casting?

A: Die casting injects molten metal into steel molds under pressure, achieving high precision and fast production for non-ferrous metals. Sand casting uses sand-based molds, is more versatile for sizes and materials, and is cost-effective for low-volume or complex shapes.

Q: Is Post-Machining Always Required after Die Casting?

A: Aside from trimming or deburring operations, post-machining your parts is not necessarily required after die casting. Post-casting machining may be required for the final part if features such as tight tolerances or specialized surface finishes are required.

Qingdao Hailong Machinery Technology Co., Ltd. is one of the most experienced die casting manufacturers and suppliers in China, also supports customized service. Please feel free to buy discount die casting made in China here from our factory. Contact us for pricelist.

Gearbox Housing Parts, fuel Pump Casing, Oil Pump Housing