Utilizing Mold Release During the Die Casting Process

By Cherry / July 17th, 2024 

Die casting is an efficient manufacturing process in which molten metal is injected into a mold to form complex parts. 

In order to ensure that the casting is removed from the mold smoothly, the use of release agents is essential.

This article will discuss in detail the importance, types, application methods, and effects of using release agents in die casting on production efficiency and 

product quality.

1. The importance of release agents

1.1 Improving de-molding efficiency

The release agent forms a thin film on the surface of the mold, reducing the adhesion between the casting and the mold, so that the casting can be removed from the 

mold smoothly and quickly, improving production efficiency.

1.2 Protecting the mold

The release agent can form a protective layer on the surface of the mold, reduce the direct erosion and wear of the molten metal on the mold, extend the service 

life of the mold, and reduce production costs.

1.3 Improving the surface quality of castings

The use of release agents can reduce surface defects of castings, such as scratches, sticking, etc., and improve the surface finish and overall quality of castings.

2. Types of release agents

2.1 Water-based release agents

Water-based release agents use water as the main solvent and are environmentally friendly and pollution-free.

It is suitable for most metal die castings, but attention should be paid to the humidity and temperature of the use environment to prevent moisture from 

evaporating too quickly and affecting the effect.

2.2 Oil-based release agent

Oil-based release agent has good lubrication and anti-adhesion properties and is suitable for high-temperature environments.

Its disadvantage is that it is easy to leave oil stains and the mold needs to be cleaned regularly.

2.3 Semi-permanent release agent

Semi-permanent release agent forms a durable film on the surface of the mold and can be used many times without spraying before each die casting.

It is suitable for high-demand production environments, but the cost is relatively high.

2.4 Dry release agent

A dry release agent is a new type of release agent that dries quickly after spraying to form a thin and solid film. It is suitable for high-speed die-casting 

production lines and can significantly improve production efficiency.

3. Application method of release agent

3.1 Spraying method

The spraying method is the most common method of applying a release agent. The release agent is evenly sprayed on the mold surface through a spray gun.

Pay attention to the spraying amount and spraying angle to ensure uniform coverage.

3.2 Brushing method

The brushing method is suitable for small molds or precision molds, and the release agent is applied to the mold surface by a brush. The advantage is precise 

control, but the efficiency is low.

3.3 Dipping method

The dipping method is suitable for large-scale production. The mold is directly immersed in the release agent solution to ensure uniform coverage of the release 

agent. It is suitable for mass production, but attention should be paid to the recycling and utilization of the release agent.

3.4 Wiping method

The wiping method is suitable for simple molds. The release agent is applied to the mold surface with a cloth or sponge.

It is easy to operate, but not suitable for complex molds.

IV. Precautions in the use of release agent

4.1 Choose the right release agent

Choose the right release agent according to the production environment, die-casting materials, and mold characteristics to ensure the best effect.

4.2 Control the amount of spraying

Too much or too little spraying will affect the demolding effect.

The amount of spraying needs to be adjusted according to the actual situation to ensure uniform coverage.

4.3 Clean the mold regularly

During the use of the release agent, certain substances will remain on the mold surface.

The mold needs to be cleaned regularly to keep the mold surface clean and smooth.

4.4 Pay attention to safe operation

Mold-release agents are mostly chemical substances. During use, attention should be paid to ventilation and protection to avoid harm to operators.

V. Impact of mold release agents on production efficiency and product quality

5.1 Improve production efficiency

The use of mold release agents can significantly reduce the sticking phenomenon of castings, increase the demoulding speed of castings, shorten the production 

cycle, and improve overall production efficiency.

5.2 Improve product quality

Mold release agents can effectively reduce defects on the surface of castings, improve the surface quality and dimensional accuracy of castings, and enhance the 

market competitiveness of products.

5.3 Reduce production costs

The use of mold release agents can effectively reduce production costs and improve the economic benefits of enterprises by extending the service life of molds, 

reducing maintenance frequency, and improving production efficiency.

VI. Environmental performance of mold release agents

6.1 Application of environmentally friendly mold release agents

With the enhancement of environmental awareness, environmentally friendly mold-release agents have gradually received attention.

Water-based release agents are the first choice for environmentally friendly release agents because of their non-toxic and pollution-free characteristics.

6.2 Recycling

When using release agents, pay attention to the recycling and reuse of release agents to reduce waste and reduce the impact on the environment.

6.3 Green Manufacturing

Enterprises should actively adopt environmentally friendly release agents and green manufacturing processes to enhance the environmental image of enterprises and 

respond to national environmental protection policies.

Conclusion

The use of release agents in the die-casting process can not only improve production efficiency, protect molds, and improve the surface quality of castings, but 

also reduce production costs and enhance product competitiveness.

By reasonably selecting and correctly using release agents, enterprises can achieve more efficient and environmentally friendly production goals.

I hope this article can provide useful references for the die-casting industry and help enterprises stand out in the fierce market competition.

For more info, you can refer to: https://www.youtube.com/shorts/JLX410QV_kw

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/WhatsApp/Wechat: +86 13598704163

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

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

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