Packaging Industry Precision In Quadruplicate 1-Out-4 PP Extrusion System

Product Specification

1. Product Introduction
Producing four straps simultaneously is not the hard part; the challenge is making them as precise and consistent as "clones." Our system places "precision" at the core of its design. The precision-machined, integrally formed flow diverging die head has internal channels optimized via computational fluid dynamics simulation, ensuring equal pressure and flow loss during melt distribution, eliminating "uneven feeding" from the source. Coupled with the extruder's stable melt delivery (melt pump optional) and full-line closed-loop temperature control, it achieves highly uniform width, thickness, weight, and mechanical properties across all four strands (tolerance ≤ ±0.05mm). This is not just a showcase of technology but a solemn commitment to your brand's quality reputation.

2. Main Specifications

• Die Head Precision Assurance: The flow diverging die head is made of high-quality die steel with CNC precision machining; flow channel surfaces are polished to a mirror finish to reduce melt stagnation and degradation. Key dimensional tolerances are stricter than national standards.

• Homogenization Design: The die head incorporates multi-stage buffer and distribution chambers to effectively homogenize melt pressure, ensuring the melt state (viscosity, temperature) at all four die lips is consistent.

• Process Stability: The extruder's 7-zone temperature control with ±1°C accuracy lays the foundation for providing uniform and stable melt. Full-line speed synchronization control avoids thickness variations caused by haul-off differences.

• Inspection & Feedback: Online diameter or thickness gauges can be optionally equipped for real-time monitoring of all four strands; data can be used for production quality traceability and process fine-tuning.

3. Technical Parameters Table

4. FQA:

• Q1: How do you ensure the four straps have exactly the same thickness? Won't the center strap be thicker and the sides thinner due to flow division?

  • A1: This is precisely the core technology of our die head design. Traditional "T-type" or "coat-hanger" flow distribution can indeed cause uneven flow between the center and ends. We employ a "heart-shaped" or "spiral" flow distribution structure optimized via CFD (Computational Fluid Dynamics), combined with internal flow resistance adjustment devices (such as chokes or adjustment bolts) that allow fine-tuning of each flow channel's resistance. During equipment commissioning, we calibrate the flow using standard material, adjusting these devices to ensure completely equal output speeds from all four outlets, fundamentally solving thickness unevenness.

• Q2: Will the die head precision degrade over long-term use, leading to poor product consistency?

  • A2: The long-term precision of a die head depends on material, wear, and maintenance. Our die head uses high-hardness, corrosion-resistant die steel and undergoes heat treatment for exceptional wear resistance. Under normal use, precision can be maintained for years. We recommend regular preventive maintenance, including cleaning the die lips and inspecting flow channel surfaces. We also offer die head refurbishment and re-polishing services. Consistency during production relies more on stable process control (temperature, speed), which our system strongly guarantees.