Which Casting Method is the Best for Making Zinc Castings?

By Cherry / July 4th, 2024 

Introduction

Zinc castings are widely used in many industries, such as automobile manufacturing, electronic equipment, building hardware, etc. Choosing the right casting method 

is essential to producing high-quality zinc castings. This article will introduce several common zinc casting methods and analyze which method is best for making 

zinc castings.

Common zinc casting methods

Die casting

Sand casting

Centrifugal casting

Investment casting

Continuous casting

Die casting

Principle

Die casting is to inject molten zinc alloy into a metal mold under high pressure so that it cools and solidifies rapidly to form parts of the desired shape.

Advantages

High precision: die castings have precise dimensions and high surface finish.

High efficiency: suitable for mass production, low production cost per piece.

Complexity: parts with complex shapes can be produced.

Disadvantages

High mold cost: large initial investment.

Material limitations: mainly used for non-ferrous metal alloys such as zinc, aluminum, and magnesium.

Sand casting

Principle

Sand casting is to pour molten zinc alloy into a sand mold and take out the casting after it cools and solidifies. Sand molds can be used once or repeatedly.

Advantages

Flexibility: Suitable for small batch production and large castings.

Low cost: The mold manufacturing cost is low.

Disadvantages

Poor surface quality: The surface of the casting is rough and needs to be processed later.

Low precision: The dimensional accuracy and shape complexity are not as good as die casting.

Centrifugal casting

Principle

Centrifugal casting is to injecting of molten zinc alloy into a high-speed rotating mold, and the metal is evenly distributed and formed into casting through 

centrifugal force.

Advantages

Uniformity: The casting has high density and few internal defects.

Suitable for round castings: such as pipes, sleeves, etc.

Disadvantages

Shape restrictions: Mainly used for cylindrical castings.

High equipment cost: Special equipment is required.

Investment casting

Principle

Investment casting (lost wax casting) is coating the wax mold with refractory material to form a shell mold, then melting the wax, pouring the molten zinc 

alloy into the shell mold, and take out the casting after it cools and solidifies.

Advantages

High precision: Suitable for the production of complex and fine parts.

Good surface quality: the casting surface is smooth and almost no subsequent processing is required.

Disadvantages

Complex process: long production cycle and high cost.

Suitable for small batch production: cost is not economical for large-scale production.

Continuous casting

Principle

Continuous casting is continuously injecting molten zinc alloy into a continuously moving mold to form a long strip casting and then cutting it into different 

lengths as needed.

Advantages

High efficiency: suitable for large-scale production of long strip parts.

Good uniformity: stable casting quality and few defects.

Disadvantages

Shape restrictions: mainly used for long strip castings with simple shapes.

Large equipment investment: continuous casting equipment is required.

Comparison and analysis

According to the characteristics of the above casting methods, it can be seen that:

Die casting is the most commonly used method for manufacturing zinc castings, especially suitable for large-scale production of high-precision and complex-shaped 

parts. 

Although the mold cost is high, the single-piece production cost is low and the efficiency is high, which is the best choice for large-scale industrial 

production.

Sand casting is suitable for small-scale production and large castings. The mold cost is low, but the precision and surface quality are poor, which is suitable 

for products with low surface requirements.

Centrifugal casting is suitable for the production of cylindrical castings, with high density and good quality, but limited shape.

Investment casting is suitable for the production of fine and complex small batch parts, with complex processes and high costs, and is suitable for high-end 

precision castings.

Continuous casting is suitable for the production of long and simple parts, with high efficiency, but limited shape and large equipment investment.

Conclusion

Considering factors such as the precision, complexity, production efficiency, and cost of the castings, die casting is the best method for manufacturing zinc 

castings. 

The die-casting process can produce high-precision and high-quality zinc castings, which are suitable for mass production and have significant economic benefits. 

For zinc castings that require high precision and complex shapes, die casting is undoubtedly the best choice.

Through the introduction of this article, it is hoped that readers can clearly understand the advantages and disadvantages of various zinc casting methods, and 

choose the most suitable casting method according to specific needs to achieve the best production effect and economic benefits.

Contact LK Egypt to learn more info about the die-casting machine

LKAGENT OFFICE DCM

Address: Industry Zone, South of Port Said Kebly, Egypt

https://www.zazdiecasting.com/

Phone: +86 13598704163

Mobile: +20 101 304 3317      +20 150 181 8310

Email: jack@zazmae.com      ahmedmahmoud@zazmae.com

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