Methods Used In Production Of Structural Foam

By Jaclyn Hurley


Structural foam is a term that is commonly used to refer to thermoplastic injection molding. These are components that have been made from the molding process and which tend to have core that is cellular. A cellular surface is one where the outer surface is usually denser than the accompanying inner layers.

Typically, there are certain materials that are used. The materials will then result in the production of products such as business machine housings. Other products include container pallets and point of sale displays. Business machine chassis components are also produced using this particular type of molding.

When it comes to producing this kind of foam, different approaches can be used. Each approach will have an impact on the end product in terms of the texture that is achieved. Common methods will include typical molding processes, use of conventional molding machines, combining different molding tools and the use of low injection pressure.

When it comes to the low pressure process, different dedicated injection machines will be used. The machines are used to introduce a steady stream of gas in to plastic that has already been melted. The melted plastic is usually found in a molding tool. Once the gas has been introduced, the plastic component will then form based on the shape that had been used.

Molding machines can also be used in production of these types of plastics. When using these machines, blowing agents are going to be introduced in to all the materials that are being used in production. The heat emanating from the melted plastic makes all the agents to combine and react resulting in formation of plastic.

Another method that is often used is that of typical moldings. The typical moldings are in many cases used in producing larger components. Even though the method is effective, its main drawback is that the resulting products tend to have a surface that is rough and quite streaky.

Low cavity pressure can also be used in combination with different mold tools. The pressure is used on different materials including cast steel and cast aluminum. Compared to other methods this method has been known to be the cheapest of them all.

Components made from this particular process can also be used as replacements for other common materials. Among the materials that can be replaced are wood, fiber glass and even metal. The replacement is often achieved at a reduced cost and at the same time tends to boost productivity.

When compared to injection molding, structural molding is much better. This is because the resulting products are not only thicker, but they also sturdier as compared to the products that are made from the other method. The items can also be recycled meaning that the environment will not be destroyed in any way.

The types of systems used during production are known as front runner systems. These systems are very unique in that they are not only easy to assemble and dismantle, but they can also be manipulated in different ways. A slight adjustment will change the type of flow being experienced. You can therefore use one machine to produce items of different sizes.




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