The two-color injection molding machine can process two different materials at the same time
Double-shot molding is a more sophisticated and complex process than ordinary injection molding. It involves combining two different plastic resins during the same machining cycle. Depending on the desired end result, two-shot molding can also incorporate additives or different colors. These types of plastic molding processes require higher mold design and construction requirements.
The process requires a thorough understanding of materials and their processing. It also requires an efficient mold design. Understanding the properties and behavior of different materials is essential for optimizing cost-per-unit production and assuring end-use product performance reliability. There are many advantages to using this process.
A rotary double-shot injection molding machine can process two different materials simultaneously. The movable half of the mold contains first-shot cavities, while the stationary half contains cavities for the second. When the mold is rotated, the movable part of the mold aligns with the sprue of the second step. The second material is then injected to combine with the first one. The second shot then begins to mold the rest of the product. Because this process involves no removal of the product from the mold, the final product will look exactly like the mold. It is important to consider how to support the mold during the process.
The hydraulic ejector mechanism of a two-color injection molding machine is an integral part of the machine. This mechanism is responsible for pushing the solidified part out of the mold, after the mold has been closed by the clamping bar. Its movement is smooth, flexible, and simple. It also has no limit in the time it takes to open or close the mold. The ejector mechanism should be designed with safety devices to prevent it from over-pressurization.
The ejector mechanism has two main parts: the ejector bar and the ejector plate. The ejector bar pushes the ejector plate forward, and the ejector pins push the solidified part out of the open mold cavity. The ejector mechanism helps in reducing the waste materials during the injection molding process.