The main precautions for plastic injection molding and […]
The main precautions for plastic injection molding and the processes included in it:
1. Injection molding product molding cycle, which includes injection molding time and product cooling time. Effective control of these times has a profound impact on product quality. Before injection molding, we should clarify the product molding cycle through sample styles and other methods.
2. The temperature of the injection mold, the crystallization temperature and speed of different plastic particles are different, and the appearance, deformation, size, rubber mold, etc. of the product have different requirements; this makes the temperature of the injection mold In the case of using different plastics, product requirements, etc., the control of the mold temperature is different.
3. Molten plastic injection pressure. The plastic faces a lot of resistance during the process of filling the mold cavity. This makes the injection pressure directly determine the size, weight, density, appearance, etc. of the product! If any one of these factors is affected, the product will become scrap. This requires the injection engineer to reasonably define the injection pressure control based on the comprehensive factors of the product.
Fourth, the injection speed, the speed of the injection speed has an important influence on the appearance quality of the product. The injection speed generally needs to be achieved by adjusting how much oil is supplied to the injection cylinder per unit time.
5. The temperature of the barrel and the temperature of the melt. The temperature of the melt can be measured at the nozzle or by the air jet method. The melt temperature plays a major role in the flow properties of the melt. Plastic has no specific melting point. The so-called melting point is a The temperature range in the molten state. The temperature control of the two also plays a vital role in the quality of the product.