how does injection molding plastic work

Injection molding is an injection and molding method.

Detailed process:

The first is the mold clamping process: the pressure oil in the mold clamping cylinder pushes the mold clamping mechanism to move, and the mold plate moves to close the mold.

The second step injection device: after the mold is locked with the clamping force during the injection process, the injection device enters the working condition to make the nozzle and the mold fit.

The third pressure-holding process: during the process of filling the mold cavity until the filling is full, the screw is required to maintain a certain pressure on the melt to prevent the melt from flowing back in the mold.

The fourth step cooling and pre-plasticizing process: once the gate is sealed, the pressure-holding process is cancelled, and the product is naturally cooled and shaped in the mold; at the same time, the Dakuma injection molding machine drives the pre-plasticized oil motor to rotate the screw, which will granulate from the hopper The plastic is transported forward and plasticized.

The fifth step of injection device withdrawal, mold opening and ejection process of plastic products: after the pre-plastic metering and anti-extrusion process is completed, in order to prevent the nozzle from forming cold material due to long-term contact with the cold mold, it is usually necessary to withdraw the nozzle from the mold , That is, the injection device will return to working condition.

Injection molding, also known as injection molding, is an injection and molding method. The advantages of the injection molding method are fast production speed, high efficiency, operation can be automated, a variety of colors, shapes can be simple to complex, the size can be from large to small, and the product size is accurate, the product is easy to replace, and can be complex in shape Parts, injection molding is suitable for mass production and complex shape products and other molding processing fields.

At a certain temperature, a screw is used to stir a completely melted plastic material, which is injected into the mold cavity under high pressure, and then cooled and solidified to obtain a molded product. This method is suitable for mass production of parts with complex shapes and is one of the important processing methods.