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Importance of pre-molding back pressure in injection molding process
Pre-molding back pressure is a very important part of injection molding processing. It refers to the process of making the molten plastic reach a certain pressure and speed before entering the mold by adjusting the injection pressure and speed before the mold is closed. This process is of great significance to ensure product quality, improve production efficiency and reduce energy consumption. This article will introduce the importance of pre-molding back pressure from the following aspects in detail.
First, pre-molding back pressure helps to improve the flow properties of molten plastic.
In the injection molding process, the molten plastic needs to flow under a certain pressure in order to fill all corners of the mold. If the pressure is insufficient, the flow properties of the molten plastic will be affected, resulting in defective products. By adjusting the pre-molding back pressure, the molten plastic can be made to reach the appropriate pressure before entering the mold, so as to improve its flow performance and ensure the quality of the product.
Second, pre-molding back pressure can improve the efficiency of injection molding production.
In the injection molding production process, the flow rate of molten plastic has a great impact on production efficiency. If the flow rate of molten plastic is too slow, it will lead to the mold filling time is too long, thus reducing the production efficiency. By adjusting the pre-molding back pressure, can to a certain extent to improve the flow rate of molten plastic, shorten the mold filling time, improve production efficiency.
Third, pre-molding back pressure can also reduce energy consumption.
In the injection molding production process, injection pressure and speed is one of the main factors affecting energy consumption. If the injection pressure is too large or too fast, it will lead to increased energy consumption. By adjusting the pre-molding back pressure, can ensure product quality under the premise of reducing the injection pressure and speed, thereby reducing energy consumption, to achieve green production.
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