1. Raw material pretreatment

Before conducting ABS precision injection molding, it is necessary to pre-treat the raw materials. Usually, a dryer or oven is used to treat ABS particles to remove moisture from them. Excessive moisture can cause bubbles or even a decrease in quality on the surface of the molded part. In addition, some toughening agents, flame retardants and other additives can be added to improve the molding performance and comprehensive performance of ABS.

2. What is the injection molding process flow

It mainly includes the following 5 aspects:

(1) Loading: Place the processed ABS particles into the hopper of the injection molding machine.

(2) Heating and melting: Align and close the mold with the injection system through the locking system of the injection molding machine. Then entering the heating and melting stage, it is necessary to control parameters such as melting temperature, pressure, and time to melt ABS particles into a liquid state in the injection cavity.

(3) Injection molding and pressure maintenance: After melting is completed, the injection molding machine begins to inject liquid ABS into the mold. After the injection is completed, a certain amount of pressure should be maintained to ensure that the filling material fully fits the mold.

(4) Cooling solidification: After completing the pressure maintenance, the injection molding machine will no longer apply any pressure. ABS will quickly cool down inside the mold, thereby solidifying and forming quickly.

(5) Mold opening and unloading: Finally, under the control of the injection molding machine, the mold separates and pushes the formed components out of the mold. At the same time, it is necessary to reset the mold for the next filling.

3. Key points in the design of injection molded parts

When conducting ABS injection molding, the following four aspects need to be considered:

(1) Product size and shape: Large and complex shapes require the use of large injection molding machines and molds.

(2) Product wall thickness: It is related to the melting fluidity of ABS, and either too large or too small wall thickness has an impact on the forming process.

(3) Burr treatment: Due to the hardness of ABS, it is not easy to produce burrs, but attention still needs to be paid to treatment.

(4) Shrinkage rate: Due to the presence of a certain shrinkage rate during the ABS curing process, it is necessary to leave sufficient reserve to ensure that the product size meets the design requirements.