Production line and factory setup overview
A medium rigid-conduit line producing 16-50 mm PVC electrical wiring conduit through controlled dry blending of certified suspension PVC resin, stabilizer, filler and impact/process additives, hot/cold mixing, metered feeding, conical twin-screw extrusion, dual-cavity die forming, vacuum calibration, cooling, synchronized haul-off, permanent marking, dust-contained cutting, socketing where specified and electrical-conduit inspection.
Recommended lowest-entry line configuration Launch a dual-cavity 16-50 mm rigid electrical-conduit family at 80-150 kg/h with one verified lead-free formulation. Contract hot/cold mixer, SJSZ51/105-class conical twin-screw extruder, dual dies/calibrators, vacuum tank, haul-off, printer, cutter and test laboratory. Water-pressure pipe, flexible conduit and cable trunking are separate products and tooling.
Production process and implementation sequence
- Formula approval and dry blending
- Twin-screw plasticizing
- Dual-cavity die forming
- Vacuum calibration and cooling
- Synchronized haul-off and marking
- Dust-contained length cutting
- Optional socket forming
- Dimension, impact, compression and flame release
Products, capacity and market fit
- Building wiring creates repeat demand for safe conduit.
- Dual cavities improve small-diameter output without a high-speed four-cavity launch.
- A controlled local dry blend can reduce formulation cost.
- Flame, impact, compression and bend performance—not colour—determine conduit suitability.
- Rigid PVC electrical conduit - OD, wall, stiffness class, impact, compression, bend, flame, marking and socket - Building contractors and electrical wholesalers
- Matched conduit length and socket - One compatible joint system with pull-wire interface where specified - Approved building wiring systems
Core production machinery and line specifications
| Machine / stage | Function / value | Production note |
|---|---|---|
| Hot/cold mixer and feeder | Produces repeatable dry blend | Lead-free formula |
| Conical twin-screw extruder | Plasticizes filled rigid PVC | SJSZ51/105 class |
| Dual dies and vacuum tank | Forms two 16-50 mm conduits | Contracted sizes |
| Haul-off, printer and cutter | Controls dimensions and lengths | Dust extraction |
| Optional socket former | Forms compatible joints | Approved profile |
| Conduit laboratory | Tests mechanical and flame performance | Named standard |
Raw materials, utilities and factory requirements
- Suspension PVC resin with certificate
- Approved lead-free stabilizer, impact aid, processing aid and controlled filler
- Pigment/masterbatch and printer consumables
- Packing and clean documented start-up recycle only
- Stable three-phase electricity with verified connected load
- Closed-loop cooling water with chiller or cooling tower
- Dry covered resin/additive storage and segregated finished goods
- Ventilation, fire protection, safe lifting and guarded machinery
Indicative low-entry investment and implementation plan
These planning ranges prioritize economical machinery, local labor and local civil works. Final pricing follows confirmed capacity, product specification, delivery terms and site conditions.
| Scope | Indicative range | Entry-plan note |
|---|---|---|
| Mixer, feeder and twin-screw extruder | US$38k-82k | Lead-free dual-cavity basis |
| Dies, vacuum, haul-off, cutter and printer | US$28k-65k | 16-50 mm launch set |
| Laboratory, dust and utilities | US$15k-38k | Conduit-specific tests |
| Freight, installation and spares | US$17k-42k | Formula trials included |
| Indicative installed low-entry total | US$98k-227k | Building and resin stock excluded |
Detailed proposal and next step
The proposal contains the complete line flow, machinery scope, raw-material and utility requirements, implementation stages and indicative entry planning. Final configuration follows confirmed products, capacity, site and budget.