But the direct extrusion press has a thermodynamic problem.
但是正向挤压机也存在一个热力学的问题。
The direct extrusion press design is the most popular design because it is simple to produce, operate and maintain.
正向挤压机是普遍采用的设计，因为它易于生产加工、控制使用和维护保养。
The deforming force of cone-die direct extrusion is solved by a mathematic method based on the simplified flow model of slip line field.
基于滑移线场的简化流动模型，运用数学方法求解出了一种锥形模正挤压变形力的最佳上限解，并将该上限解用通用解析式表达出来。
The ultimate tensile strength and elongation of extrusion bar after forging process was much higher than that of the direct extrusion bar.
先锻后挤工艺棒材最终抗拉强度和断后延伸率高于直接挤压棒材。
This change is good for increasing the productive time of the press but it increases the natural thermodynamic problem with the direct extrusion press.
增加了挤压的生产时间这一变化是好的，但也增加了正向挤压的热力学问题。
The theory and characters of side extrusion were introduced, the differences between side extrusion and direct extrusion, reverse extrusion were discussed.
简要介绍了侧向挤压的原理、特点及其与正挤压、反挤压比较的优缺点。
In this paper, the numerical solution is got through analyzing the direct extrusion procedure theoretically, that can describe the differential equation of metal flowing accurately.
通过对正挤压工序的理论分析得到了数值解，其精确地满足金属流动描述的微分方程。
For direct extrusion presses, temperature tapering of the billet can provide significant increase in press speed without reducing profile quality and in some cases improving profile quality.
对于正向挤压机来说，短锭温度递减却能使挤压速度明显提高，不会影响型材的质量，一些时候还会提高型材质量。
E glass direct roving is used in filament winding and extrusion process, hand lay-up and woven roving products.
无碱玻璃纤维缠绕用直接无捻粗纱应用于纤维缠绕和挤压成型工序，手糊成型和方格布产品。
Liquid extrusion is a new process for direct formation of tubes, rods and shape products.
液态挤压工艺是直接成形管、棒、型材的全新工艺。
Liquid extrusion is a new process for direct formation of tubes, rods and shape products.
液态挤压工艺是直接成形管、棒、型材的全新工艺。
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