polymer processing

The pipe sector is one of the most challenging construction sectors today. Economic pressures have led to fewer construction projects in many major markets, while specifiers have been increasingly expected to balance higher performance with reduced cost. Today's plastics provide the opportunity to overcome these challenges. The economic and environmental benefits achieved by plastic pipe are an outcome of features including: Zero corrosion — Plastics resist corrosion from water and many chemicals, reducing wear and tear and increasing longevity. Increased flexibility — Easy to install, even at low temperatures. Durable and tough material — Plastic pipes give a high resistance to fracture and fatigue Leak-free joint fusion — Buttwelding, socket welding, electro-fusion fittings Light weight materials — The light weight of plastic contributes to reducing man hours and the need for heavy equipment, such as cranes. Plastics are also easier to transport and store. Easier installatio...

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The second step in validating an injection mold according to injection mold validation flow chart is dry cycle mold . The steps before are: 1. Mold certification Purpose: The purpose of the dry cycle mold is to evaluate the mold mechanical actions for any gross problems prior to injecting plastic into the mold. The machine operator at the mold builder or molder should know how to adjust the settings on the injection unit to cycle the mold without injecting plastic into the tool. If at anytime during the dry cycle procedure there is a possibility that damage is being done to the tool or if the mold is not operating as designed, pull the mold from the press and have it examined by an experienced mold builder. This stage is often carried out prior to the customer being invited to the mold builder for the debug. If there are any machine/mold operation issues it is preferable for the mold builder to remedy this before customer attendance, saving unnecessary travel. If there is a serious ...