Injection Molding Using A Two-Part Pet Preform Mould

Injection molding usually uses a Pet Preform Mould made of two parts. The first part is a cavity which gives the concave portion an outer shape. The second part is the core, which gives a part of the inner shape. The cost of the mold depends on the geometry of the part being manufactured; as the part becomes more complex, the complexity of the mold increases and is therefore more expensive. During the injection molding process, the injection molding machine melts under high pressure and injects thermoplastic into the mold. The molten plastic then assumes the shape of the mold, cools and solidifies. The formed part is then pushed out of the mold. A system is required to push the part out of the mold as the part shrinks onto the core as it cools. This is done with ejector pins, which are usually located at the core of the mold. Injection molding Extrusion is suitable for the manufacture of parts with uniform cross-sections such as pipes and rods. The thermoplastic pellets are placed in a hopper to supply an extrusion barrel containing a rotating screw. The heater in the barrel melts the pellets, and the friction from the screw generates heat to keep the pellets in a molten state. The melt is then forced through a die hole of the desired geometry to form the part. Unlike injection molding, in injection molding, cooling and replenishing the mold with new materials tends to slow down the process, and extrusion is a continuous process as the material is continuously fed into the barrel and extruded. Therefore, the extrusion manufacturing efficiency is extremely high. Compression molding techniques are used to form thermoset materials. The mold is mounted on a press heated by steam or electricity. The raw material, commonly referred to as the charge, is placed in the mold cavity to soften. The mold is then closed, forcing the material to take the shape of the mold. The mold remains closed and pressurized until the part solidifies. The time can vary from 10 seconds to 24 hours, depending on the wall thickness and geometry of the part. All of the above are some of the technical techniques commonly used in the production of China Pet Bottle molds. Different technologies can meet the needs of different customers, and the skilled use of different production techniques can make Chinese plastic bottle makers more recognized by customers.