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.

Production can be done using any one of four main methods. The main methods include use of low pressure, combination of different molding tools, and even conventional molding tools. Typical molding process can also be used during the production phase.

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.

Conventional molding machines can also be used to produce this kind of plastic. When using such machines, some blowing agents are added in to the materials. Chemical agents that have been dried are mixed with different plastic granules. The heat from the plastic that had been melted will cause the blowing agent to react. This reaction will lead to formation of a 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.

Using this kind of foam will have its own set of benefits to the user. The major benefit is that this product can be used in place of traditional materials such as wood, metal and even fiber glass. The replacement is achieved at a very minimal cost and will also see an improvement in productivity.

Injection molding is another method used in production of plastics. If compared to structural molding, you will notice that the latter is more effective. All the products produced using these methods are of a thicker nature. They are also sturdier thereby making them more effective.

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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