There are two techniques that are used to make plastic parts: structural foam and structural web. Both methods are considered a form of injection molding. The manufacturing processes are unique. They can replace concrete, wood, fiberglass, metals and many other materials used in the production of many everyday products.
The web process is often referred to as a gas assist method. It is called this because it uses gas pressure to fill the mold with melted plastic. This technique is used when the object has walls with a variable thickness and has cross sections that are hollow. The objects produced have an attractive appearance. The part is stiff without adding additional weight. This often important in design considerations and to ensure functionality.
The web technique uses nitrogen gas. Immediately after the plastic resin is inserted into the cavity, nitrogen gas is injected to push the molten plastic against the cavity walls. This action packs out the entire mold in a uniform manner. This will produce a part with a reduced weight of between 10% to 30% less than other production techniques. The process produces components at a lower cost while still preserving the strength and integrity of the piece.
The web process helps designers avoid the limitations they encountered in making things from plastic. For example, because parts can be colored and textured, there is no need to use paint. There are environmental advantages in using this method as a result of this. Low pressure molding needs less energy. Less raw materials are consumed. The end results are products that have an attractive glossy and smooth finish. The products are strong but, at the same time, weigh less.
Parts created with the foam process have a cellular core. Around the exterior is a dense outer skin. Parts will possess an increased ratio of weight to strength. Parts will be more rigid than parts of the same weight and material made using other methods. The foam processes share a lot of the characteristics of standard injection molding except nitrogen is employed as the foaming agent.
The melted polymer is combined with nitrogen and inserted into the mold under low pressure. The mold is not pack completely as is done with high pressure molding. Right after the nitrogen injections, the mixture expands to fill the mold. This results in a density reduced plastic part that is rigid.
Products made using the foam method are used to replace concrete, wood, metals, fiberglass. The parts will have low internal stress. They are straight and stable. They can handle temperature changes, exposure to weather, and rough handling. They can be made using a variety of different types of resins. The manufacturing process with foam is easily repeatable and quick. It is an efficient and cost effective manufacturing process.
Structural foam and structural web are manufacturing processes that are used in creating custom designed parts. These are techniques that are cost effective and efficient. Product designers enjoy the advantages that are inherent in these methodologies. Each has particular characteristics appropriate for their uses.
The web process is often referred to as a gas assist method. It is called this because it uses gas pressure to fill the mold with melted plastic. This technique is used when the object has walls with a variable thickness and has cross sections that are hollow. The objects produced have an attractive appearance. The part is stiff without adding additional weight. This often important in design considerations and to ensure functionality.
The web technique uses nitrogen gas. Immediately after the plastic resin is inserted into the cavity, nitrogen gas is injected to push the molten plastic against the cavity walls. This action packs out the entire mold in a uniform manner. This will produce a part with a reduced weight of between 10% to 30% less than other production techniques. The process produces components at a lower cost while still preserving the strength and integrity of the piece.
The web process helps designers avoid the limitations they encountered in making things from plastic. For example, because parts can be colored and textured, there is no need to use paint. There are environmental advantages in using this method as a result of this. Low pressure molding needs less energy. Less raw materials are consumed. The end results are products that have an attractive glossy and smooth finish. The products are strong but, at the same time, weigh less.
Parts created with the foam process have a cellular core. Around the exterior is a dense outer skin. Parts will possess an increased ratio of weight to strength. Parts will be more rigid than parts of the same weight and material made using other methods. The foam processes share a lot of the characteristics of standard injection molding except nitrogen is employed as the foaming agent.
The melted polymer is combined with nitrogen and inserted into the mold under low pressure. The mold is not pack completely as is done with high pressure molding. Right after the nitrogen injections, the mixture expands to fill the mold. This results in a density reduced plastic part that is rigid.
Products made using the foam method are used to replace concrete, wood, metals, fiberglass. The parts will have low internal stress. They are straight and stable. They can handle temperature changes, exposure to weather, and rough handling. They can be made using a variety of different types of resins. The manufacturing process with foam is easily repeatable and quick. It is an efficient and cost effective manufacturing process.
Structural foam and structural web are manufacturing processes that are used in creating custom designed parts. These are techniques that are cost effective and efficient. Product designers enjoy the advantages that are inherent in these methodologies. Each has particular characteristics appropriate for their uses.
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