Manufacturing Engineering

What is the History of the Welding Process? What are Welding Methods? What are the Types of Welding and Advantage of Welding? What Is Welding By heating two or more surfaces to a melting point, welding joins two or more pieces of metal or thermoplastic. Typically, this process involves applying heat and pressure to the surfaces being joined, causing the materials to melt and fuse. History of the Welding History of Welding Method/Process ·          Earliest stage of welding is known as forge welding ·          16th century - Soldering process used for brazing silver and copper ·          18th century - Gas welding and Arc welding ·          19th century - Fusion welding, Metal electrode welding and Carbon arc welding. ·          20th century - Electric arc welding Several new...

What is Blow Molding? A blow molding process is used to produce hollow plastic products such as bottles, containers, and automotive parts. A thermoplastic material is heated in the form of a preform or parison, and then blown into the desired shape using compressed air inside a mold. After the plastic has cooled and solidified, the mold is opened and the finished product is ejected. This process is called blow molding. What Chemicals are in PET Bottles? A type of plastic, PET (polyethylene terephthalate) bottles are typically made from a polymer called PET. Ethylene glycol and terephthalic acid are the two main chemicals used to make PET bottles. A long-chain polymer is formed when these chemicals react together Pet Bottle Manufacturing Process A PET preform, which is a small, tubular plastic piece, is heated until it becomes soft and pliable for blow molding. As the preform is placed into the mold, it is inflated with compressed air to form the bottle shape. Depending on the shape an...