In high-end packaging applications, EAA extrusion coating is evolving from simply being feasible to becoming controllable. At the same time, production complexity is rising rapidly :
l 膜层更薄，厚度波动容忍度持续收窄
Thinner coating layers, with continuously tightening thickness tolerances
l 材料温敏性强，工艺窗口变窄
High temperature sensitivity, leading to a narrower process window
l 高温环境下具有腐蚀性，设备稳定性面临挑战
Corrosive behavior at elevated temperatures, challenging equipment durability
l 高速生产中，效率与良率难以兼顾
High-speed production, where efficiency and yield are difficult to balance
生产过程中的厚度波动、边缘不稳定与调机依赖，正在成为制约良率的关键因素，也让淋膜工艺对设备与控制能力提出了更高要求。
Thickness fluctuation, edge instability, and heavy reliance on manual adjustment are becoming key constraints on yield. As a result, extrusion coating processes are placing increasingly stringent demands on equipment performance and control capability.
01 材料：控制流动均匀性
Material : Controlling Flow Uniformity
EAA的关键，不是能不能挤出来，而是流动是否均匀。精诚将设计起点前移，从材料流变特性入手：基于流变仪测试数据建立材料模型，并导入仿真系统进行流道设计优化；根据实际工况匹配衣架式或鱼尾型结构，实现流动路径的精细控制，使出口速度分布均匀性≤3%，并降低压损、平衡滞留时间。
The key to EAA is not whether it can be extruded, but whether the flow is uniform. JCTIMES moves the design starting point upstream, beginning with the rheological characteristics of the material :
Based on rheometer test data, material models are established and imported into simulation systems for manifold design optimization. According to actual operating conditions, either coat-hanger or fishtail structures are selected to achieve refined control of the flow path—ensuring outlet velocity distribution uniformity ≤3%, while reducing pressure drop and balancing residence time.
02 走向自动闭环控制
Moving Toward Automatic Closed-Loop Control
真正决定产品稳定性的，不只是设计，而是过程控制能力。精诚自动淋膜模头，通过热膨胀螺栓调节系统，与在线测厚仪构建闭环控制逻辑：测量—计算—调节，实现模唇间隙的实时动态微调，使厚度偏差自动收敛。系统可在短时间内完成偏差修正，显著缩短调机周期并降低材料浪费。
What ultimately determines product stability is not design alone, but the capability of process control.
JCTIMES automatic extrusion coating die integrates a thermal expansion bolt adjustment system with an online thickness gauge to establish a closed-loop control logic : measurement – calculation – adjustment. This enables real-time dynamic micro-adjustment of the die lip gap, allowing thickness deviations to automatically converge.
The system completes deviation correction within a short response time, significantly reducing start-up adjustment cycles and minimizing material waste.
制品调节精度：±0.5%
模唇调节精度：0.005 mm
唇口间隙变化响应速度＜4s（传统自动模头同样工序大约需要10分钟）
Product thickness adjustment accuracy : ±0.5%
Die lip adjustment accuracy : 0.005 mm
Die gap response time : < 4 s (compared to approximately 10 minutes for conventional automatic dies under the same operation)
03 效率、稳定：可控变量
Efficiency & Stability : Controllable Variables
在实际生产中，真正影响成本的，往往是细节问题：换单时间、边料损耗、长期稳定性。围绕这些核心痛点，在结构与材料上进行系统优化：
In real production, the factors that truly drive cost are often the details: changeover time, edge trim waste, and long-term operational stability.
Targeting these core pain points, systematic optimizations are implemented at both structural and material levels :
结构层面
Structural Design
滑轨式内挡结构：提升密封与调节稳定性
Slide-rail inner deckle structure : enhances sealing performance and adjustment stability
三段式内挡结构：分区控制，优化边缘厚度
Three-section inner deckle structure : zoned control for optimized edge thickness
三导杆内挡系统：适用于宽幅与高负载场景
Three-guide-rod inner deckle system : suitable for wide-width and high-load applications
同时配合：在线宽度调节（不停机调整）和厚边消除装置（边缘流量与温度控制），有效降低换单废料与边缘损耗。
面对EAA材料的腐蚀特性，模头基材选用耐腐蚀合金钢，表面粗糙度可达Ra0.025μm，模头温度偏差控制在±1℃以内，适应150米/分钟以上的高速生产需求。
In parallel, the system is equipped with online width adjustment (non-stop adjustment) and an edge-bead reduction device (edge flow and temperature control), effectively reducing changeover scrap and edge trim loss.
To address the corrosive characteristics of EAA materials, the die body is manufactured from corrosion-resistant alloy steel. Surface roughness reaches Ra 0.025μm, and die temperature deviation is controlled within ±1°C—meeting the demands of high-speed production exceeding 150 m/min.
目前，EAA淋膜模头已广泛应用于液体无菌包装（利乐包、屋顶包）、医疗透析材料、工业防腐结构层及环保复合材料等领域，持续服务多种高要求生产场景。
At present, EAA extrusion coating dies are widely applied in liquid aseptic packaging (such as Tetra Pak cartons and gable-top cartons), medical dialysis materials, industrial anti-corrosion structural layers, and eco-friendly composite materials—continuously serving a variety of high-demand production scenarios.
当材料性能不断逼近极限，真正决定结果的，不再只是设备精度，而是整个过程是否可控。我们始终以精准设计与智能控制，让淋膜从经验驱动，走向系统控制。
As material performance continues to approach its limits, what ultimately determines the outcome is no longer equipment precision alone, but whether the entire process is truly controllable.
We consistently combine precise engineering design with intelligent control, enabling extrusion coating to evolve from experience-driven operation to system-controlled production.
