In multilayer co-extrusion blown film processing, the role of the die is undergoing a significant transformation. It is evolving from a single forming component into a critical control unit that determines bubble stability, thickness uniformity, and the continuity of production.
随着层数增加、材料组合更加复杂以及薄型化趋势加速，吹膜工艺对稳定性的要求不断提高。
传统依赖经验的调机方式，正在逐步逼近边界——
厚度波动难以压缩、层间结构不稳定、换料过程不可控。
As the number of layers increases, material combinations become more complex, and the trend toward thinner films accelerates, the stability requirements of blown film processing continue to rise.
Traditional setup methods that rely heavily on operator experience are approaching their limits—
thickness fluctuations become harder to control, interlayer structures grow less stable, and material changeovers remain unpredictable.
这些问题的背后，本质上都指向同一个核心：熔体在模头内的流动过程，尚未被充分控制。围绕这一问题，精诚将多层共挤模头的优化，从单一结构设计，转向对流动过程的系统重构。
Behind these challenges lies a common root cause: the flow of the melt within the die has not yet been fully controlled. To address this, JCTIMES has shifted its approach to optimizing multilayer co-extrusion dies—from focusing on individual structural design to undertaking a systematic reconstruction of the melt flow process.
01 每一层：刚好到位
Each Layer: Precisely in Place
在流量分配方面，通过对圆模内部螺旋分配结构进行建模，并结合CFD反向优化，使各层熔体在环向流动过程中实现均匀分布与稳定匹配，在进入模口前完成流量协调，从源头提升厚度一致性与气泡稳定性。
In terms of flow distribution, the internal spiral manifold of the circular die is modeled and optimized through CFD-driven reverse engineering. This approach ensures uniform distribution and stable matching of each melt layer during circumferential flow. By coordinating flow rates before entering the die lip, it enhances thickness consistency and bubble stability at the source.
在流变与剪切控制方面，基于材料非牛顿特性（如Carreau模型），构建连续渐变流道，避免局部流动突变带来的剪切峰值，使材料始终处于可控加工区间，在保证流动性的同时降低降解风险，提升多层界面稳定性。
Rheology and Shear Control In rheological and shear management, continuous gradient flow channels are engineered based on the non-Newtonian characteristics of polymer melts—such as those described by the Carreau model. This design prevents shear peaks caused by abrupt flow transitions, ensuring the material remains within a controllable processing window. It preserves flowability while minimizing degradation risks, thereby enhancing the stability of multilayer interfaces.
02 流动路径与热场：协同控制
Flow Path and Thermal Field: Coordinated Control
在停留路径方面，通过全流线连续设计与流道曲率优化，减少死角与回流区域，缩短熔体停留时间分布（RTD），使流动路径更加可预测，从而降低碳化与凝胶风险，提升连续运行稳定性。
In terms of residence path optimization, a fully streamlined continuous design and optimized flow-channel curvature minimize dead zones and backflow regions. This shortens the Residence Time Distribution (RTD) and makes the melt flow path more predictable. As a result, the risks of carbonization and gel formation are reduced, enhancing the stability of continuous production.
通过多区独立控温与热场协同优化，精确调节环向温度分布，使温度参与流动调节过程，通过“温度—粘度—流量”的联动控制，使整体流动状态进一步趋于均衡。
Through multi-zone independent temperature control and coordinated thermal field optimization, the circumferential temperature distribution is precisely regulated, allowing temperature to actively participate in flow control. By enabling coordinated “temperature–viscosity–flow” control, the overall flow state is further balanced.
03 仿真与验证：可计算
Simulation and Validation: Computable
为使设计与实际生产一致，精诚将流体仿真贯穿模头开发全过程。
φ500mm九层平面叠加包装膜模头为例，设定产量600kg/h，
对模头内部压力与温度场进行系统仿真，并结合产线数据进行校验。
To ensure consistency between design and actual production, JCTIMES integrates fluid simulation throughout the entire die development process.
Taking a φ500 mm nine-layer flat feedblock packaging film die as an example, with a set output of 600 kg/h, systematic simulations of the internal pressure and temperature fields are conducted and validated against production line data.
通过“仿真—验证—再优化”的持续迭代，复杂的多层流动过程逐步转化为可分析、可调节、可预测的工程问题。
Through continuous iteration of“simulation–validation–re-optimization,”complex multilayer flow processes are progressively transformed into engineering challenges that are analyzable, adjustable, and predictable.
04 重新定义
Redefine Precision
当多层共挤向更高层数与更高精度发展时，模头的价值也在被重新定义——从“实现加工”，走向“稳定复制”。
As multilayer co-extrusion advances toward higher layer counts and greater precision, the value of the die is being redefined—from merely enabling processing to ensuring stable and repeatable production.
在CHINAPLAS 2026现场，精诚将带来面向多层共挤吹膜的模头解决方案，呈现一种更加可控、可复制的加工方式。
At CHINAPLAS 2026, JCTIMES will present a die solution tailored for multilayer co-extrusion blown film, showcasing a more controllable and repeatable approach to processing.
