The central feeding system utilizes the pneumatic conveying principle, which is the most ideal conveying solution to accommodate the characteristics of raw material and spatial distribution of the injection molding machine. Pneumatic conveying systems can be divided into positive pressure conveying and negative pressure conveying based on their characteristics. Positive pressure conveying is mostly used to convey powdered or finely ground materials with extremely uneven particle sizes.
Trial use for short-distance conveying; negative pressure conveying, also known as vacuum conveying, is suitable for relatively uniform granular materials. Compared to positive pressure conveying, negative pressure conveying is more advantageous because it is a closed conveying method. It can ensure the stability of the material being transported to the greatest extent possible, and can transport dried raw materials over long distances. It is ideal when used in conjunction with a drying and dehumidifying machine. The working principle of vacuum suction is to create a certain negative pressure within the hopper cavity, allowing the material to be drawn into the hopper.