Die Casting

Introduction

Die casting is a precise manufacturing process used to produce metal parts in industrial production. It enables the creation of complex shapes in high production volumes while maintaining tight dimensional tolerances.

What is Die Casting?

Die casting is a manufacturing process based on injecting molten metal into a mold (die) under high pressure. The pressure is maintained until the metal solidifies, after which the part is ejected from the mold.

Different injection methods are used depending on the material type and operating temperature.

Die casting is commonly used for producing parts from aluminum, zinc, magnesium and other metals. Each material offers different properties and requires specific process parameters.

The high accuracy of die casting allows for near-net-shape production, meaning minimal post-processing is required. This results in significant cost savings in large production runs.

Die casting is widely used for manufacturing complex components in industries such as automotive, electronics, medical and defense.

Hot Chamber vs Cold Chamber Die Casting

The two main types of die casting are hot chamber and cold chamber processes:

Hot Chamber Die Casting
The injection mechanism is immersed in molten metal, allowing for fast production cycles. Suitable for metals such as:

• Zinc
• Lead
• Tin
• Certain magnesium alloys

Cold Chamber Die Casting
Molten metal is poured into the injection system for each cycle. Suitable for:

• Aluminum
• Copper
• Magnesium
• Brass

Aluminum die casting, the most common application, is performed using the cold chamber method to protect the injection system from high temperatures.

Materials Used in Die Casting

Material selection depends on the final product requirements such as weight, strength, temperature resistance and cost.

Common materials include:

• Aluminum – lightweight, strong and corrosion resistant
• Zinc – easy to process and highly versatile
• Magnesium – the lightest structural metal
• Copper and brass – excellent electrical and thermal conductivity

How Does Die Casting Work?

The process includes several stages:

1. Mold Preparation
The die is cleaned, heated and coated with a release agent to prevent defects.

2. Injection
Molten metal is injected into the mold under high pressure, typically ranging from tens to hundreds of megapascals.

3. Cooling
The metal cools and solidifies inside the mold.

4. Ejection
The mold opens and ejector pins push the part out.

5. Finishing
Excess material (flash) is removed, and additional finishing or machining may be performed if needed.

Advantages of Die Casting

Die casting offers several engineering advantages:

• High dimensional accuracy (±0.05 mm in complex parts)
• High production speed (cycle time of 2–10 seconds per part)
• Low cost per unit in large production volumes
• High strength due to improved material density
• Ability to produce complex geometries in a single process

Industrial Applications of Die Casting

Die casting is widely used in industries that require precise, lightweight and strong components:

Automotive Industry
Engine blocks, gear housings, brake components and structural parts

Electronics Industry
Enclosures, connectors, panels and housings

Defense Industry
Weapon components, equipment housings and structural assemblies

Medical Industry
Device housings, surgical equipment components and diagnostic devices

Aerospace Industry
Lightweight structural parts, engine housings and aircraft interior components

Quality Control in Die Casting

Quality is measured primarily by dimensional accuracy and consistency.

Quality control includes:

• CMM (Coordinate Measuring Machine) inspection
• SPC (Statistical Process Control) during production
• Real-time monitoring to detect and correct deviations

About Our Services

We connect customers in Israel with approved die casting suppliers in Asia and Europe.

Our experience in semiconductors, medical, aerospace and defense industries allows us to match technical requirements with the right manufacturer.

We manage the entire process, from technical specification and First Article Inspection (FAI) to full production and quality assurance.

FAQ

What is the difference between die casting and vacuum casting?
Die casting injects molten metal under high pressure, while vacuum casting is performed under reduced pressure and is typically more expensive.

How much does a die casting mold cost?
The cost depends on part complexity. More complex aluminum molds are more expensive, but the cost is spread across large production volumes.

What production volumes are suitable for die casting?
Die casting is cost-effective for thousands of units and above.

What surface finishes are possible?
Options include anodizing, powder coating, nickel plating, chrome plating and more.

What is the difference between die casting and CNC machining?
Die casting is ideal for large production runs, while CNC machining is better for small batches and high precision parts.

Is die casting suitable for medical applications?
Yes, especially for device housings and components, provided suppliers meet ISO 13485 standards.

What is the typical lead time?
Tooling takes 4–12 weeks, followed by 2–6 weeks for production. Repeat orders are faster.