Cold Chamber Die Casting Machine is a type of equipment used for metal die casting, mainly for the production of high-precision, dimensionally consistent parts.

The cold chamber die casting machine is particularly suitable for metals with high melting points, such as aluminum, copper and brass.

Cold chamber die casting machines separate the furnace from the injection chamber, specailly designed for processing high-melting alloys like aluminum, magnesium, and copper. Their working principle enables handling higher temperatures and pressures, making them suitable for large complex structural parts. Proper selection requires considering clamping force, injection performance, die space, and automation configuration. 

This article explains the working principles and structural features of cold chamber machines, analyzes their applicable materials and applications, compares them with hot chamber machines, introduces key selection parameters, and demonstrates equipment advantages through HAICHEN case studies.

• Working Principles and Structure of Cold Chamber Die Casting Machines
• Cold Chamber Die Casting Machine working process
• Metals for cold chamber die casting machine
• Typical Application Areas
• Key Parameters for Cold Chamber Machine Selection
• Part Characteristics and Requirements
• Haichen cold chamber die casting machine supplier

Working Principles and Structure of Cold Chamber Die Casting Machines

Cold chamber machine design separates melting and injection functions. This enables processing of high-melting-point metals.

Separate Structure Design

• Furnace stands seperately from the main machine, only melting and holding metal
• Injection chamber does not contact molten metal continuously, receiving measured amounts each cycle
• This separation prevents injection components from long time immersion in high-temperature metal

Operating Cycle Process

• After molten metal reaches set temperature in holding furnace, automatic ladle system picks up metal
• Ladle pours measured metal into horizontal injection chamber
• Injection plunger advances rapidly, pushing metal into mold cavity for filling
• After solidification, mold opens and ejector pushes out casting, plunger returns for next cycle

Core Component Composition

• Injection system includes cylinder, rod, and plunger tip, providing high-pressure power
• Clamping mechanism uses toggle or hydraulic type, afford huge reaction force during injection
• Ladling system enables automatic measured feeding, ensuring consistent metal volume each cycle

Cold Chamber Die Casting Machine working process

Chamber die casting is a form of die casting. This process can produce high-quality metal parts with complex shapes and geometries.

Melting the Metal

Melting the metal in a separate furnace and heated to the appropriate temperature.

Pouring

Pour the molten metal carefully into the injection chamber using a ladle or other pouring device.

Injection of Cold Chamber Die Casting Machine

A hydraulic or mechanical plunger forces the molten metal into the die cavity at high pressure, ensuring that the metal fills all the details of the die.

Solidification

The metal cools and solidifies quickly within the die, taking the shape of the mold.

Ejection

Eject the solidified part from the die, ready for any post-casting treatments such as trimming or finishing.

Metals for cold chamber die casting machine

The cold chamber die casting process is suitable for metals with high melting points. These metals may include aluminum, magnesium, copper, etc. Therefore, it is important to understand the characteristics of a metal to use in cold chamber die casting before choosing one.

Aluminum and its alloys

• Aluminum and its alloys are one of the most commonly used materials in cold chamber die casting because of their high melting point and good mechanical properties.
• Use aluminum alloys in automotive, aerospace and other industries because of their durability, versatility and light weight.

Copper and its alloys

• Copper and its alloys are also important materials for cold chamber die casting, especially in applications requiring high strength and corrosion resistance.
• Use copper alloys to make components with high load capacities.

Copper

• Copper is widely used in cold chamber die casting because of its excellent strength and corrosion resistance.
• It is often used where strength and visual appeal are required.

Magnesium and its alloys

Although magnesium alloys have a lower melting point, they can be produced by cold chamber die casting, especially when lightweight and high strength parts are required.

Typical Application Areas

Automotive industry

It includes engine blocks, transmission housings, structural parts

Communication electronics

5G base station heat dissipation housings, phone mid-frames

Power tools

The power tools usually includes like motor housings, gearbox cases, etc.

Lighting fixtures

In the ligting fixtures, it applicalbe to produce LED heat sinks, lamp housings and so on.

Key Parameters for Cold Chamber Machine Selection

Choosing the right cold chamber machine requires considering multiple technical parameters.

Clamping Force Determination

• Clamping force must exceed separating force generated during injection
• Calculation formula: Clamping force = Projected area × Injection pressure × Safety factor
• Aluminum injection pressure typically 40-80MPa, safety factor 1.1-1.3

Injection System Performance Parameters

• Injection force determines ability to overcome flow resistance, needs to match mold complexity
• Injection speed affects filling time, thin-wall parts need high-speed capability
• Intensification pressure determines feeding effect, affects internal density

Die Space Dimensions

• Tie bar spacing determines maximum mold width that can be installed
• Mold thickness range must cover all product mold sizes
• Opening stroke must meet minimum distance needed for casting removal

Automation Interface Configuration

• Reserve mounting interfaces and signal connections for extractor and sprayer
• Control system supports multi-machine interaction and process parameter storage
• Optional vacuum systems, mold temperature controllers and other peripheral equipment

Part Characteristics and Requirements

• Large complex structures need high clamping force, cold chamber machines reach thousands of tons
• High-strength parts require dense internal structure, cold chamber high pressure injection meets demand
• Thin-wall parts need high speed filling, cold chamber injection speed control range wide

Haichen cold chamber die casting machine supplier

Haichen is a cold chamber die casting supplier. Haichen’s machines can handle a wide range of metals and alloys, including those with high melting points. And it allows for the production of complex and intricate shapes with high dimensional accuracy.

Haichen Machinery Company continues to innovate in the field of cold chamber die-casting machines, providing customers with high-performance equipment and professional process support.

Customer background and production challenges

• A certain new energy vehicle enterprise needs to produce integrated aluminum alloy battery shells
• The part size reaches 1.5m × 1.2m, with a wall thickness of only 2.5mm, making it extremely difficult to form
• Require the interior of the casting to be dense and meet airtightness testing and strength standards

Haichen Cold Chamber Die Casting Machine Solution

• Configure the Haichen HCL series 3500 ton ultra large cold chamber die-casting machine
• Adopting a high rigidity template structure, the deformation is controlled within 0.05mm/m
• Equipped with a high-performance injection system, with a maximum injection speed of 6m/s and a boost pressure of 50MPa
• Integrated vacuum system and intelligent temperature control module to ensure filling quality

Technical Innovations and Core Advantages

• Self-developed real-time closed-loop control, injection repeat accuracy ±0.5%
• Patented injection curve optimization algorithm for thin-wall parts
• Intelligent clamping force adjustment system compensating for mold thermal expansion
• Modular design supporting quick mold changes, changeover time reduced 40%

Besides cold chamber die casting machines, we also supply hot chamber die casting machines and auxiliary machinery. If any demand, welcome to consult us.

HAICHEN Machinery provides high-performance cold chamber machines through continuous innovation and comprehensive process support, helping customers achieve efficient and stable production in automotive, communications, and power tool industries.