Considered to be the simplest form of Pet Preform molding, the production of extruded bottles requires the cooling of a plastic tube in the water in the mold. When the tube is inflated, it forms the shape of the mold and forms the finished product. This is by far the cheapest form of molding, which means it is a popular choice for making plastic bottles and custom plastic bottles.
Injection molding is more labor intensive (and more costly) than extrusion, but for projects that require more detailed information, such as precision molded necks, injection molding may be a good choice. In this method, the polymer is injected into the thermal chamber, allowing the manufacturer to make custom plastic containers with bottle necks, such as containers with test tubes. Unfortunately, injection molding can only be used on small bottles, there is no way to control the strength or design of the bottle.
Stretch forming is commonly used in plastic sodas and water bottles. As with injection molding, manufacturers begin by injecting a polymer into a heated cavity. However, after cooling, the manufacturer reheats the mold to make it malleable. Air can be pumped into the hose and the hose can be stretched to twice its original length. Plastic bottles made in this way are also relatively strong. Having said that, stretch forming is quite expensive and only profitable for large manufacturing operations.
Despite the dramatic changes in the plastics industry (and the plastics technology itself), plastic blow molding is still very popular. In the case of oversupply, always contact the manufacturer you can trust to find the best method for your product at the best price. Jilian Plastics from Taizhou is a reliable China Pet Bottle manufacturer. Welcome to leave a message and advice.