主流道

双主流道注射模设计

Design of injection mould with double primary runner

介绍双主流道模具及注射机双喷嘴机构能在模具结构简单的前提下，提供成对浇口，使长型芯受到的塑料熔体压力保持平衡，明显地减少弹性弯曲变形。

A simplified mould structure with double primary runner mounting on injection machine with double jet mechanism provides coupled runner opening which keeps pressure from plastic molten mass in balance and can evidently diminish elastic bending de ˉ flection of long cores .

独创了双重主流道、分流道为H形的热流道。

, creating a double central channel and H-shaped hot-runner as its branch channel .

PVC-U管件注塑模具斜主流道及冷料井的设计

Design of oblique main runner and quench well of injection mould for PVC-U tubes

实验证实PP-R熔体在入口区发生了垂直于主流道方向的环向次级流动。

Annular secondary flow at die entrance , which was perpendicular to sprue , was proved in the experiment .

介绍PVC-U管件注塑模具斜主流道及冷料井的设计，提出了设计原则、设计依据、型式选择及其在注射成型时的工艺要求。

The design of oblique main runner and quench well of injection mould for PVC-U tubes is introduced . Design principle and basis , the type selection and the process requirement during injection molding are put forward .

注射模圆锥形主流道的优化设计

Optimization of the Circular Cone Main Tube of Injection Mold

测量了径向再生器中的分流主流道的气体速度分布；

Gas velocity distribution in the main channels of radial regenerator has been investigated ;

径向反应器主流道压力分布分析

An Analysis of the Fluid Hydrostatic Pressure Distribution for Radial Flow Fixed bed Reactors

塑料模具斜主流道的设计

Design of Sloping Runner of Plastics Mould

外置机械式密封应该位于泵主流道以外的凹式箱体内，以避免受到破坏。

The outer mechanical seal shall be located in a recessed housing outside the main flow path of the pump to avoid damage .

模拟了采用圆柱管主流道时机头流道内的流动分布，得出结论：主流道由圆锥管改为圆柱管时对流动均匀性影响不大，通过设置适当的阻尼仍然可以达到挤出平衡；

Simulation of the die applying the cylindrical main runner showed the fact that when the cylinder replaced the cone the change of uniformity was trivial .

模具设计中浇口和主流道尺寸极大影响充填效果，对制品体积收缩有较大影响。

The result of filling micro heat exchanger was great effected by the size of the gate and the main channel , so do the volume shrinkage .

在主流道速度较大时，涡流中心混杂着空气，主流道速度较小时，涡流中心完全为聚合物熔体。

If the speed of melt in main channel is bigger , the vortex mingled with air ; if the speed is less , vortex is completely full of polymeric melt .

考虑主流道熔体剪切力对微特征区域的影响，对制件进行宏微观解耦模拟，并对微流道进行准静态方腔流分析。

We simulate the filling process of micro-channel based on macro and micro decoupling method , considering the influence of melt shear force in macro-channel , and analyze quasi-static square cavity flow .

弱凝胶沿主流道迅速通过后产生“负压力”区，周围孔隙中的剩余油被吸出并汇入油流。

The gel stream passes through a big channel at high speed and remains behind some " negative pressure " zones which attract the dispersed oil from the pores around into oil stream .

冷却蒸汽完成冷却工作后径向汇入主流道由动叶排出，这将对烟气主流造成强烈干扰，使叶栅流道内气流流动十分复杂。

After cooling work the cooling steam flow into the main channel , resulting a strong interference on the main flow of the flue gas , making the air flow in the cascade passage very complex .

曹雪芹晚年皈依佛门，佛家思想占其主流，道、儒思想淡出。

His later years'convension to Buddhism , the mainstream of his thought at that time , in the meanwhile the Taoist and Confucian thinking fading out .

可以看出，学生文化是一种积极向上的生活方式，它不与主流文化背道而弛、相互对立，而是有益的、必要的补充。

From this case , the dissertation draw a conclusion that pupil culture is a positive life style , it does not go against our mainstream culture but a beneficial supplement .

研究表明：油层水淹导致储层孔渗分异更加明显，主要表现为油层主流动喉道决定的有效孔隙体积减少，驱油效率下降，无水采油期变短。

The results of the study showed that the submergence of oil reservoir has made permeation of storage formation hole more obvious , which mainly minimized the effective holes that could determine the flow of the reservoir , thus reducing the oil-driving efficiency and shortening the oil production period .