模口的形状决定了挤出塑料产品的型状，如制尼龙绳用的纤维丝或塑料管。
The shape of the die decides the shape of the extruded plastic-a fibre, perhaps, for use in nylon thread, or a tube.
模口的形状决定了挤出塑料产品的型状，如制尼龙绳用的纤维丝或塑料管。
The shape of the die decides the shape of the extruded plastic-a fibre, perhaps, for use in nylon thread, or a tube .
采用人工神经网络方法预测了受模口温度和挤出流率影响的型坯成型阶段的膨胀。
Neural network method was used to investigate the parison swell affected by the die temperature and extrusion flow rate.
本文分析了异型(圆环型与矩形的组合)材成型时塑料熔体在模头中的流动机理，并给出了模口成型长度的设计方法。
While profile, the cross section was composed of annulus and rectangle, was extruded, the flow mechanism the plastic melt in the die was analyzed and the design method of die land was given.
否则，你也可以使用一个较大的口模开口，以减少口模出口应力，然后把挤出物拉细到所需要的尺寸。
Or you can use a larger die opening to reduce die-exit stress, and then draw the extrudate down to the desired size.
对着口模出口进行空气吹扫能帮助减少和控制积料。
Air sweeps pointed at the die exit can help reduce and control buildup.
一些类型的口模积料会很快氧化并变成棕色或者黑色。
Some types of die buildup oxidize quickly and turn brown or black.
有时，较低的口模温度会在口模内表面上生成一个冷却的树脂层，这个树脂层慢慢地移出到口模出口，然后与本体料流分离，从而引起积料。
Sometimes lower die temperatures can create a cool layer of resin on the inner surface of the die that creeps slowly to the die exit and then separates from the bulk flow, causing buildup.
较高的口模和熔体温度是减少口模出口应力的一种方法。
Higher die and melt temperatures are one way to reduce die-exit stress.
清除积料后在口模出料口使用脱模剂或者硅酮可以减轻积料程度并延长两次清除之间的时间。
Applying mold release or silicone to the die exit area after cleaning can reduce the rate of buildup and extend the time between cleanings.
解决方法要么是减少口模出口应力，要么是减少组分从熔体中分离的倾向。
Solutions are either to reduce die-exit stress or to reduce the tendency for components to separate from the melt.
也可以添加少量的氟聚合物加工助剂来减轻口模出口的应力。
Fluoropolymer processing AIDS can also be added in small amounts to reduce stress at the die exit.
例如，高度不相容的聚合物熔融掺混时，常常出现极度的口模积料。
For example, extreme die buildup often occurs when highly incompatible polymers are melt blended.
修改的口模出口据称可以减少口模积料，包括一种方形陡出口、尖形陡出口、弧形过渡形出口、外扩台阶出口、内扩台阶出口、外展形出口(见图)。
Modified die exits that claim to decrease die buildup include a sharp square exit, sharp pointed exit, radiused exit, outward-stepped exit, inward-stepped exit, and outward-flared exit (see diagram).
改变挤出物的牵引角度，就可以改变挤出物在口模上的堆积位置，这样就容易清除积料了。
Changing the Angle at which the extrudate is drawn away from the die can change the placement of buildup on the die and make it easier to clean.
结果表明，不同角度圆锥口模挤出过程中，熔体在收敛流道受到拉伸流变，导致强烈的入口弹性效应，表现出熔体在不同角度圆锥口模挤出时有不同的挤出胀大比。
The results show that the extensional flow of melt in convergent die results in intense entrance elastic effect and distinct extrusion swell in conical die with different angles.
结合不同工艺原理，分析指出了机头口模的结构特点和设计要点。
With different process principle, given the structure property and key design point of die mold of the head.
应用熔体流动速率仪考察了口模半径、载荷及温度对聚全氟乙丙烯（FEP）流动性能的影响。
The influences of die radius, load and temperature on the flow properties of FEP melt were investigated by using a melt flow indexer.
其原因包括在喂料区加热时间太短和在过渡区熔融太慢、混合不良、在机筒和口模中存在过多的热量损失。
Causes include heating too quickly in the feed zone, melting too slowly in the transition zone, insufficient mixing, and excessive heat loss in the adapters or die.
口模-流动模拟也被成功用于研究口模出口处出现的应力，以及评价口模-出口几何的变化。
Die-flow modeling has also been used successfully to study the stresses occurring at the die exit and to evaluate changes in die-exit geometry.
对刚塑性有限元计算的结果与试验结果进行比较，并提出缩口的最佳模角。
The theoretically calculating results are compared with those of experiment and the optimum die Angle in nosing process is proposed.
通过算例表明，应用该法进行口模优化设计可以减小压力降和口模出口速率变化率。
An example shows that using this method can obtain a uniform velocity profile across the die and minimize pressure drop.
更有效的方法是将加有氟聚合物的金属涂层施予口模内部，以减少口模出口的应力。
More effective is application of metallic coatings that incorporate fluoropolymers to the inside of the die to reduce stress at the die exit.
经典成核理论假设气泡核的形成是在静态条件下发生的，它没有反映在口模流场中动态因素(拉伸、剪切等)对气泡成核的影响。
Because classical nucleation theory supposes that bubble formation is occurred under static state, it doesn't reflect the effects of dynamic factors on bubble nucleation, such as shear and elongation.
表明口模拉伸过程中既存在应力诱导的结晶过程，又存在温度诱导的二次重结晶过程。
It is showing where is either the crystallizing process by the stress introducing or secondary crystallizing process by the temperature introducing.
与传统的拉伸辊牵伸、静压挤出及柱塞式挤出工艺相比，口模牵伸具有明显的优越性和发展潜力。
Compared with conventional tensile drawing and hydrostatic or ram extrusion, die drawing process has considerable advantages and developing potentials.
提出一种新型的能够保证熔体在口模出口处速度及压力均匀分布的片材机头。
A new type sheeting die which can guarantee the polymer fluid get the even velocity and pressure distribution at the mold export was put forward.
深入讨论了聚合物熔体在不同长径比、不同角度圆锥口模的挤出胀大现象及机理。
Discussed thoroughly the extrusion swell phenomenon and mechanism of polymer melts in conical die with different entrance angles and different ratios of length to diameter.
深入讨论了聚合物熔体在不同长径比、不同角度圆锥口模的挤出胀大现象及机理。
Discussed thoroughly the extrusion swell phenomenon and mechanism of polymer melts in conical die with different entrance angles and different ratios of length to diameter.
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