The PVC twin-pipe extruder is a plastic extrusion molding equipment specifically designed for simultaneously producing two PVC pipes. Its core advantage lies in "improving the production efficiency of small-diameter PVC pipes (such as 16-32mm electrical conduits and water supply pipes)." It achieves "double output from a single machine" by driving two extrusion channels through a single main unit system. It is the mainstream equipment for large-scale PVC pipe production (such as the mass production of household wiring conduits and small drainage pipes).
The equipment follows a process of "raw material melting → dual-channel distribution → synchronous shaping → synchronous traction → synchronous cutting." Its core feature is achieving "two pipes produced from a single feed" through "one main unit with two extrusion channels."
The PVC twin-tube extruder is optimized for "synchronous dual-tube production" in both structural design and operational logic. Its core features can be summarized in three main areas: "synchronicity, high efficiency, and flexibility," directly addressing the pain points of traditional single-tube extruders, namely "low capacity and high cost."
Dual-tube Synchronization: Ensures consistent product quality.
Symmetrical Melt Distribution: Utilizing a "single main extruder + dual symmetrical flow channel die" design, molten PVC raw material, after passing through the main flow channel, is distributed to the two sub-flow channels according to "equal flow rate and equal pressure," ensuring that the melt temperature and pressure of the two tubes are completely consistent, avoiding the problem of "one tube with a thick wall and the other with a thin wall" from the outset.
Synchronized shaping and cooling: Equipped with "dual-station independent shaping chambers", the vacuum degree (-0.06~-0.08MPa) and cooling water temperature (20-25℃) of the two shaping chambers are controlled synchronously in real time, and the traction machine adopts "dual track synchronous drive" to ensure that the outer diameter and roundness deviation of the two pipes are ≤±0.2mm, which is far superior to the consistency of "two single-pipe machines producing separately".
PVC 16-32mm pipes are the "king of cost-effectiveness for small-diameter applications," with core advantages including low cost, easy installation, and adaptability to various scenarios, making them particularly suitable for home wiring conduits and small-scale water supply/drainage needs. Their drawbacks are that they are "not resistant to high temperatures and high pressures," so they should be avoided in hot water and high-pressure environments. When selecting a pipe, the intended use (wiring/water supply/drainage) must be clearly defined, and the corresponding type of product should be chosen, ensuring compliance with national standards (e.g., electrical conduits comply with GB/T 13381.1, and water supply pipes comply with GB/T 5836.1). This will help avoid safety hazards caused by inferior products (e.g., non-flame-retardant wiring conduits or water contamination from water supply pipes).
