What is a flow formation?

Flow Molding is a production method used in the plastic industry to create strong hollow containers; Some examples of products that are commonly created during this process are plastic bottles with drinks, plastic drums and fuel tanks. The typical process of pressing the blowing involves melting the plastic into the hollow tube, known as the parison, the location of the tube between the halves of the mold and the pumping of the pressure air into the parison until it spreads to fit the mold molds; Two halves of the mold are then separated and the finished container is released.

Plastic power

plastics are actually chains of polymers held together by a strong but liquid binding. The reason why a thin bottle of soda is strong enough to withstand the pressure of carbonated liquids is the result of polymer chains in a plastic bottle consisting of two directions; This generally creates a very strong strap effect. Plastic can then be stretched thin without sacrificing strength and blowing of pressing experts lasting this property for thinning but strong conTejnery.

process

Flow Forming Any type of container requires a pre -created piece of plastic called parison; This parison is usually extruded from a plastic injection mold located very close to the pressing machine. The warm parison looks like a plastic tube upside down, with a pre -refined collar and threads for the bottom closure. Parison is mechanically loaded on the stand and two sides of the metal form in the shape of a bottle are joined around it. The difference between these three processes lies at this point of the process.

At this point of the process, the hollow ramrod is injected into the Parison center and pushes the upper part of the mold and, as possible, stretches warm plastic pre -assembly. The compressed air is then pushed in the controlled low -pressure stages through the hollow ramrod, which forces the last form of formation on the sides of the mold; Because the stretching is carried out evenly, the plastic remains evenly thin and strong. This process jE dear, but it is very effective when used to produce weight quantities, so it is ideal for things like water bottles.

plastic acts like a latex rubber balloon - if the pressure from the compressed air is controlled, the material extends evenly to form the shape of the mold. Foung forming engineers who design new equipment for the forming process often need first -hand experience to understand how to improve the equipment and the formation process.