Case Studies
The weight-per-meter control system is already installed on the extrusion lines of more than 30 wire and cable plants in South China and Central China, covering LSZH cable, low- and medium-voltage cable, extra-high-voltage cable, household wiring and optical fiber cable. Below are some photographs taken on site.
Not demo units, but batch installations on production lines
The figures below follow the counting basis for delivered projects; demo units and trials are not included.
Wire and cable plants
More than 20 in South China and 10 in Central China, all retrofitted at the extrusion process or supplied with a new line.
Product lines covered
LSZH cable, low- and medium-voltage cable, extra-high-voltage cable, household wiring, optical fiber cable.
Delivery radius
Guangdong is the center, spreading across South China; in Central China projects are delivered by on-site survey plus installation at the plant.
The retrofit sits at the feed end of the whole extrusion line and does not touch the main machine structure
The photos were taken at customer sites; customer names are withheld as agreed.
Extruder feed section retrofit complete
A stainless steel weighing hopper and blue control cabinet are mounted at the top of the feed port, and the weighing signal goes directly into the control loop.
Weighing and metering unit linked with the main machine and haul-off
The retrofit position seen from the die head end: the metering unit is at the feed end, and the control cabinet faces the operator position.
Several extrusion lines retrofitted in the same workshop
Several lines are laid out to a common plan, with control cabinet and hopper specifications configured for each machine's extrusion output.
Control cabinet, air lines and signal cable routing
The retrofit is built as a separate cabinet, keeping the existing power distribution and maintenance space and leaving the extruder body structure unchanged.
Retrofit position on a continuous extrusion line
Several lines are running at the same time in the workshop, and the weight-per-meter loop is engaged under normal production conditions.
Different cable products call for a different control focus
Low-voltage power cable / household wiring
High output and frequent specification changes; the focus is to hold weight per meter near the target and reduce the material waste caused by sitting at the upper limit over the long run.
Medium- and high-voltage / extra-high-voltage cable
Thick insulation layer and large material usage per meter; the focus is consistency along the whole length. We already have installation records on extra-high-voltage cable extrusion lines.
Low smoke zero halogen (LSZH) cable
Material density and flow behavior vary widely; the focus is fast convergence after a material change, to avoid long transition sections of scrap cable.
Optical fiber cable
Thin sheath and small cable diameter; the focus is uniformity and the efficiency of material changes and cleaning with a small hopper.
The categories above are those where the system is already installed; whether a specific machine model and specification fits is subject to the conclusion of an on-site survey.
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