Saturday, January 18, 2014

Advantages Of The Structural Web Process

By Marissa Velazquez


There are many methods that are used to manufacture plastics. Structural web method is one of them. It is also known as the gas assist method as it makes use of nitrogen gas in the moulding process. It requires low pressure conditions to curve out thick wall cross sections that are used for other various purposes. The surfaces produced are always smooth and consistent as they do not have any sink marks, thus of high quality.

The first step is to ensure that you have mold cavity in which all the plastic will be worked on. Plastic resin is put into the cavity by injecting it, followed by nitrogen gas under low pressure conditions. This gas forces the plastic to be pushed onto the cavity walls, especially the less resistant parts. The result of this is a hollow cross section that is important to clients in many different ways.

This method is different from the structural foam where a chemical blowing agent is used. This agent is mixed with the polymer melt which results in an expansion. This is done at a low volume to increase the time for expansion, and at a low pressure. Therefore, the result is a strong and rigid component that does not have any sink marks.

There are many advantages of using the gas assist to make plastics over all the other alternative processes. First, the resulting products are usually guaranteed to have quality surfaces and appearances with no sink marks. This increases the aesthetic value of a product as this is more attractive and appealing to consumers. Moreover, they can be coloured in the desired way and textured as is necessary.

Also, these products weigh less than the other products from the other procedures. This is not to mean that they are not as strong, as they are equally as rigid and can support a lot of weight. This also translates in less cost of the material used as the amount of weight needed is far less. This enables the manufacturer to be able to transfer the saved costs to other processes.

This method also produces parts from many different kinds of resins. It may not be confined to a specific type as it is flexible enough to accommodate all kinds of plastics, from the normal and common ones like polyethylene, to those that are engineered. This makes the process have an edge over the normal injection molding, as it cannot handle some of the resins or additives.

The gas assist method may be a fairly new method in the industry thus may involve quite a lot of costs when initializing it. This, however, translates into profits at the end because the products are very beneficial. Also, the time cycles used are shorter than the others, thus it takes less time to come up with the products.

You should ensure that you study the method and analyze it alongside all the other alternatives. If you are critical about producing cosmetic components that are very strong and appealing then the structural web is the most appropriate method. Besides, it saves a lot of time and money.




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