Zinc Die Casting Auto Parts

Overview

Zinc die casting automotive parts is designed and made for our Swedish customer. The product is applied for auto parts. The material is zamak #5. The surface treatment is electrophoresis. Zinc die casting auto parts have the advantage of low melting point, good fluidity, easy to weld, braze and plastic process, corrosion resistance in the atmosphere, and easy recycling and remelting of residual waste; but its creep strength is low and natural aging is easy to cause dimensional changes. Prepared by melting method, die-casting or pressure-processed into material.

Features

Our zinc alloy part is suitable for die-casting instruments, toys, lamps, decorations, electrical components and their boxes, auto parts, electromechanical parts, mechanical parts, etc. The material of our zinc die casting auto parts is an alloy composed of zinc and other elements added. Commonly added alloying elements include low-temperature zinc alloys such as aluminum, copper, magnesium, cadmium, lead, and titanium.

Product Specification

Certificate

We have ISO and SGS certificate for this zinc die casting motor parts.

Zinc Die Casting Making Process

There is the manufacture flow chart for this zinc die casting motorcycle parts.

Package

Zinc die casting electronic components is packed by bubble bag, then we will put bubble bag in each carton. Finally, we use pallet to pack total cartons.

Bubble Bag	Carton
Load to Container	Pallet

Transportation

Zinc die casting bicycle parts are sent by sea transport directly, which is much cheaper than air transport. We support both door to door and door to port service.

Sea transport	Air transport

FAQ

1. Q: What is the material of zinc alloys?

A: The traditional die-cast zinc alloys are No. 2, 3, 4, 5, and 7, and the most widely used is No. 3 zinc alloy. In the 1970s, high-aluminum zinc-based alloys ZA-8, ZA-12, and ZA-27 were developed.

Zamak 5: Good fluidity and good mechanical properties.

Used in castings that have certain requirements for mechanical strength, such as zinc die casting car parts, electromechanical parts, mechanical parts, and electrical components.

Zamak 3: Good fluidity and mechanical properties.

Used in castings that do not require high mechanical strength, such as toys, lamps, decorations, and some electrical devices.

Zamak 2: Used for mechanical parts that have special requirements for mechanical properties, high hardness requirements, good wear resistance, and general dimensional accuracy requirements.

ZA8: Has good impact strength and dimensional stability, but poor fluidity.

Applied to die-casting workpieces with small size, high precision and mechanical strength requirements, such as electrical devices.

Superloy: It has the best fluidity and is used for die-casting thin-walled, large-sized, high-precision, and complex-shaped workpieces, such as electrical components and their boxes.

Different zinc alloys have different physical and mechanical properties, which provides a choice for die casting design.

2. Q: What should we be careful when use zinc alloy?

A: 1. Poor corrosion resistance.

When the impurity elements of lead, cadmium, and tin in the alloy composition exceed the standard, the casting will be aging and deformed, which is manifested as volume expansion, mechanical properties, especially plasticity, significantly decreasing, and even cracking after a long time.

Lead, tin, and cadmium have very little solubility in zinc alloys, so they concentrate on the grain boundary and become the cathode. The aluminum-rich solid solution becomes the anode, and in the presence of water vapor (electrolyte), it promotes intergranular electrochemical corrosion. Die castings are aged due to intergranular corrosion.

2. Aging effect

The structure of zinc alloy is mainly composed of a zinc-rich solid solution containing Al and Cu and an Al-rich solid solution containing Zn, and their solubility decreases with the decrease of temperature. However, due to the extremely fast solidification rate of die castings, the solubility of the solid solution is greatly saturated when it reaches room temperature. After a certain period of time, this kind of oversaturation will gradually be relieved, and the shape and size of the casting will slightly change.

3. Zinc alloy die castings should not be used in high and low temperature (below 0℃) working environment. Zinc alloy has better mechanical properties at room temperature. However, the tensile strength at high temperature and the impact performance at low temperature are significantly reduced.

4. Zinc alloy die castings will have burrs on the surface due to insufficient clamping force, poor clamping, insufficient mold strength, and too high melting temperature. This phenomenon is called product flare, which is often a company must face. The post-processing process is mainly based on the nature of the product using manual polishing, hydrogen-oxygen explosion and Zhaoling refrigerated shot blasting machine to solve.

3. Q: What is the surface finish electrophoresis?

A: Electrophoresis is a technique in which charged particles move at different speeds in an electric field to achieve separation. Electrophoresis is common in black (sub-black, bright black), white (sub-white, bright white), followed by electrophoresis is also colored, but the process is more complicated, the organic paint film is the insulating layer, so the metal surface after electrophoresis constitutes the insulating layer. At present, the color of electrophoretic paint is relatively small, most of which are red, green, champagne, blue, etc. Almost all electrophoresis colors can be matched, but pay attention to the ratio of cathode and anode, voltage, etc. to be adjusted.

4. What is the difference between electrophoresis and anodizing?

A: First, the principle is different:

1. Electrophoresis zinc die casting parts: A coating method that uses an external electric field to make particles such as pigments and resins suspended in the electrophoresis liquid migrate and deposit on the surface of one of the electrodes.

2. Anodizing zinc die casting parts: an electrolytic oxidation process in which metal or alloy parts are used as anodes, and an oxide film is formed on the surface by electrolysis.

Two, the characteristics are different:

1. Electrophoresis zinc die casting parts: Electrophoresis is a special coating forming method developed in the past 30 years, and it is the most practical construction process for water-based coatings. It has the characteristics of water-soluble, non-toxic, easy to automate control, etc., and it has quickly been widely used in industries such as automobiles, building materials, hardware, and home appliances.

2. Anodizing zinc die casting parts: The metal oxide film changes the surface state and performance, such as surface coloring, improving corrosion resistance, enhancing wear resistance and hardness, and protecting metal surfaces.

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