外文翻譯---澆注系統形式和澆口的設計-在線瀏覽
2024-08-01 15:44本頁面
【正文】 y used form of a gate, the widespread use of plastic parts in small and mediumsized multicavity mold, And the adaptability of various plastic molding are strong, but there are traces of the gate, a weld marks, Shrinkage, stomatal defects, such as plastic parts, injection and pressure loss, the deep cavity plastic parts exhaust inconvenience. The specific to mold, form and size of its gate gate sizes are from all parts of the experience of value. 2. Gate location of choice Die design, location and size of gate of the more stringent requirements, a preliminary test mode after the gate size needed further changes, no matter what the gate, opened its location on the plastic parts molding great impact on the quality and performance, pouring a reasonable choice I opened the location is an important link in improving quality, the location of different gate at the same time also affected die structure. In short to make plastic parts with a good performance and appearance, we must seriously consider the choice of gate position, usually to consider the following principles: 1) minimize the flow of distance. 2) gate should be opened in the maximum wall thickness plastic parts. 3) the need to minimize the weld marks. 4) should help in gas from the cavity. 5) consideration of directional influence. 6) avoid jet and wiggle. 7) the gate to avoid bending and the impact load. 8) attention to the appearance of quality. According to the characteristics of plastic parts, considering more than a few principles, pouring into a triage point, a bit on the line, Point 2 pouring into the shunt open in the postdieon. D. pouring system of balance For small and mediumsized pieces of plastic injection molds have been widely used mode of a multicavity in the form of design should try to ensure that all the cavity at the same time be uniform filling and forming. Usually in the shape of plastic parts and die structure to allow the circumstances, should be from the mainstream of the cavity, to shunt the growth of the same design, shape and size of the same section (cavity layout for the balance) in the form of, otherwise we will need Size of the gate to regulate the flow gate and molding process to achieve consensus, which is pouring system balance. Obviously, we design the mold is balanced, that is, from the mainstream, to shunt the cavity of the same length, shape and size are the same section. E. cold material point of the design Upon pletion of a cycle of injection interval, taking into account the injection nozzles of the mainstream entrance and a small section of this melt due to heat and radiation below the required temperature of the plastic melt from the nozzle end of the injection machine to within about 10 Liaotong 25mm depth has a temperature gradually increased the region, at this time to reach normal temperatures melt the plastic. In this region of the flow of plastic molding and poor performance, if th
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