Injection molding processing is an indispensable part of modern manufacturing, with a delicate and complex process. It begins by injecting plastic into the mold, followed by the mold rotating along two perpendicular axes and heating up, allowing the plastic to evenly coat, melt, and adhere to the mold cavity surface under the action of gravity and thermal energy. Ultimately, it cools and solidifies into the desired shape. This process, which includes feeding, plasticizing, injecting, cooling, and ejecting, is crucial at every step. So, what preparations are necessary before injection molding processing? Next, Dongguan Yize Mold will provide you with a detailed explanation.

To ensure the smooth progress of injection molding and the high quality of the products, the preparatory work before production is particularly important. This includes preprocessing and cleaning of raw materials, cleaning of the barrel, preheating of inserts, and selection of release agents, among other steps.

Firstly, the feeding stage requires strict quantification (volume control) to ensure operational stability and uniform plasticization of the plastic, thereby obtaining high-quality plastic parts. This is a basic requirement for injection molding as an intermittent process.

Secondly, during the plasticizing stage, the molding material undergoes heating, compaction, and mixing in the injection machine barrel, transforming from a loose powdery or granular solid state into a continuous homogenized melt. This process is key to achieving good fluidity and moldability of the plastic.

Next is the injection stage, where the plunger or screw starts from the metering position in the barrel and applies high pressure through the injection cylinder and piston to quickly feed the plasticized melt into the closed mold cavity. The injection process can be further divided into three stages: flow filling, pressure holding and compensation, and backflow, each of which needs to be precisely controlled to ensure the molding quality of the plastic parts.

The cooling stage is equally important. When the plastic in the gating system has solidified, the plunger or screw is retracted, relieving the pressure on the plastic melt in the barrel and allowing new material to be added. At the same time, cooling media such as water, oil, or air are introduced into the mold to further cool it. In fact, the cooling process begins as soon as the plastic melt is injected into the mold cavity and continues until before ejection.

Finally, the ejection stage occurs when the plastic part has cooled to a certain temperature, allowing the mold to be opened and the part to be ejected from the mold under the action of the ejection mechanism. This step marks the completion of the injection molding process.

It is worth mentioning the principle of injection molding, which involves melting solid plastic at a certain melting point and injecting it into the mold at a certain speed under the pressure of the injection machine. The mold is then cooled through water channels to solidify the plastic, resulting in a product that matches the design of the mold cavity. This process is mainly used for the molding of thermoplastics.

At this point, it is necessary to mention Dongguan Yize Mould Co., Ltd. Since its establishment in 2007, we have been committed to precision mold design and manufacturing, as well as precision injection molding production. Located in Dongguan, the manufacturing capital, with convenient transportation and logistics, we specialize in providing a complete set of solutions for product design, precision mold manufacturing, injection molding and assembly, and after-sales service for automotive connectors, medical product injection molding, cleanroom injection molding, PFA custom injection molding, and more. For more information or to inquire about cooperation, please call +86 13302615729 (WeChat, WhatsApp same number), and we will be happy to serve you.