29 March, 2014

The Advantages Of Structural Foam Molding Of Plastics

By Gwen Lowe


Plastic was introduced in the 1800s and has since been used to replace metal, concrete, fiberglass and wood in the manufacture of most appliances. For instance, a big number of utensils are no longer made of aluminum or iron but plastic. In other cases, the use of concrete on floors is slowly being replaced by plastic products. People are not surprised anymore to see artistically designed plastic seats in furniture stores. What many do not know is how these chairs (for example) are made. Well, a little introduction to structural foam molding can clear the air.

Briefly, this type of molding refers to the use of an inert gas to produce foam. Once the foaming action is started, molten polymer then flows through the mold to form the required shape. It is an injection molding procedure usually carried out in low-pressure environment to produce high-density polyethylene.

It is true that the technique uses a number of raw materials; however, the Polyvinyl Chloride (PVC), Polystyrene (PS) and Polycarbonate are the most popular. From such materials, products such as Containers Pallets, Point of Sale Components and Displays can be produced. Business Machine Chassis also come from the foam method.

To appreciate the benefits of this technique, a mention of the other methods is in necessary. Well, there the main procedures include Injection, Compression, Blow (i. E. A combination of extrusion and injection methods), Rotational and Gas Assist molding methods. The other techniques include Film Insert and thermoforming. Now, each of the listed methods is good for the production of a particular product. However, foaming is considered the best in cases where the production requires no force to distribute the molten plastic.

That the technique has its positives and negatives is non-debatable. On the merits, it is not expensive to set up. In fact, it uses inexpensive molds (e. G. The aluminum molds). On the other hand, the process has the least internal stresses as opposed to Compression. It also allows the production of bigger products.

Granted, structural foam method can be cheaper than most molding techniques. When it is compared to procedures such as Compression, it may end up more expensive to start and run. So, it would not be the top choice if you do not have enough money. The other shortcoming is in regard to speed, the process is slower compared to other injection techniques, especially those employing pressure.

Learning how to contract a plastic manufacturer is just as important as the description of structural foam technique, its uses and advantages. Now, that the plastic market is full of fake goods, knowing where to buy you products or whom to contract for the same is important. In fact, when a manufacturer decides to charge higher fees for low quality product then taking some precautions is in order.

Though there are many things to look for in a plastic manufacturer, reviews from satisfied customers is the best place to start. Also, ensure the firm is registered that it operates within the local environmental laws. Finally, shop around online to ensure you only contract companies that charge affordably.




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