Custom LDPE Extruder Factories & Turnkey Systems

To provide an exact engineering proposal, our design team requires: (1) Dimensional cross-section drawings noting critical Inner Diameter (ID), Outer Diameter (OD), and wall thickness tolerances; (2) Polymer grade datasheets including Melt Flow Index (MFI), density, and additive percentages; (3) Required production output in kg/h or linear line speed (m/min); (4) Downstream sizing needs (e.g., servo rotary knife cutting, tension-controlled dual reel coiling); and (5) Primary workshop electrical specifications (voltage, frequency, pneumatic availability).

LDPE exhibits distinct branched polymer behavior. Under high shear, excess frictional heat can rupture polymer bonds. We deploy specialized barrier screw profiles with extended L/D ratios (30:1 to 34:1) alongside Maddock dispersing and pineapple mixing blocks. This separates solid beds from liquid melt pools, minimizing shear peaks while ensuring zero color-streaking and homogeneous melt temperatures within ±0.5°C.

While basic polyolefin lines switch materials, running LDPE and HDPE interchangeably at tight tolerances requires specific provisions. HDPE demands higher specific torque and distinct compression ratios to manage its crystalline matrix. We offer interchangeable bimetallic screw/barrel assemblies and variable frequency drive configurations that allow swift changeovers without sacrificing dimensional stability or output rate.

Our lines integrate multi-axis non-contact laser diameter gauges and multi-probe ultrasonic wall thickness scanning systems right after vacuum sizing. This sensor array communicates across high-speed industrial Ethernet protocols (Profinet/EtherCAT) directly with the servo caterpillar puller and extruder motor drive, establishing closed-loop speed adaptation to counter thermal shrinkage and mechanical drift.

All custom systems undergo rigorous Factory Acceptance Testing (FAT) at our 16,000 m² production facility in Jiangsu before dispatch. We encourage clients to ship specific polymer compounds for live continuous test-runs verifying CPK capability, melt pressure stability, and cut-length precision. Post-shipment, our global service group delivers on-site mechanical alignment, commissioning, and remote telemetry support.