The factory makes machines for plastic candle cups
The factory makes machines for plastic candle cups
The factory's machine for making plastic tea light candle cup is an injection molding machine.
Injection molding machines typically provide 10,000 to 40,000 PSI of plastic pressure and are used to fill and pack most components, including thin walls.In many cases, the higher the pressure drop, the more difficult the molding, or any problems associated with the part or mold can be magnified.Anything that reduces the stress required will increase the robustness of the process.Ideally, the pressure drop along the flow path of the entire flow component is minimal.However, most mold makers only care about the runner system or gate and even get a mold flow analysis to determine.Have you seen any filling studies on nozzle design?
The first recommendation is to keep the nozzle body as short as possible to reduce pressure loss.This may seem obvious, but I have seen nozzles from 50mm to 76mm in length everywhere.The 76mm nozzle body requires a pressure of more than 13,000 psi to get the plastic through.
The flow passage through the nozzle should be tapered rather than straight, to provide minimum pressure drop and allow for faster cleaning.Yes, the shape of the runner can help or hinder the conversion of color or resin.
To be fair, if it is a long nozzle body, it is difficult for it to have a sufficiently thick cone.In addition, the nozzle body may have a molten filter or mixing element, which also increases the pressure drop.These should be evaluated for functionality and pressure loss so that you know which filter is best and provide the minimum pressure loss.In addition, if you observe the pressure loss, you can know when the filter needs to be replaced.
Whether deepened to the product craft understanding.
