Faygo, una fabbrica Wanplas con 22 anni di esperienza dedicata all'estrusione di tubi e profili, costruisce la macchina per l'estrusione dei bocchetti corrugati in PVC utilizzata dai costruttori per la costruzione di protezioni elettriche per cavi installate su pareti esterne. Faygo gestisce tre fabbriche specializzate, occupa 26.650 m² a Zhangjiagang, a soli due ore dall'Aeroporto di Shanghai, e possiede 13 patenti nazionali, tra cui 8 brevetti di invenzione. Tutte le linee Faygo sono certificate CE e ISO. Questo manuale spiega come funziona una linea di tubi corrugati in PVC, quali linee di prodotti Faygo producono i bocchetti corrugati, quali proprietà del PVC proteggono i cavi all'aperto e come selezionare la linea giusta per il vostro progetto.
What a PVC Threading Bellows Extrusion Machine Is
A PVC threading bellows extrusion machine is a pipe extrusion line that forms a flexible, ring-shaped corrugated PVC tube used to route and shield electrical wires. The “bellows” name refers to the repeating corrugation that gives the conduit bend flexibility while keeping a round cross section. Installers press wires through the open ends, then clip the conduit to an exterior wall.
The machine is a complete production line rather than a single device. It pairs a single-screw extruder with a corrugator, a cooling section, a haul-off, and a cutter. The extruder melts rigid PVC, the die shapes a tube, and the corrugator presses the hot tube between moving forming blocks to create the corrugation.
For outdoor wall mounted electrical wire protection construction, the finished conduit must stay rigid enough to resist impact yet flex enough to follow corners. PVC delivers both at a low material cost, which is why it dominates building wire protection in residential and light commercial projects.
The line is best understood as a chain of unit operations, each owned by a separate station. The material handling station holds and feeds the PVC dry blend. The extrusion station converts the blend into a controlled melt. The forming station gives the melt its corrugated identity. The post-forming station cools, pulls, measures, and cuts the pipe. A central control cabinet links every station so a single operator can watch melt pressure, haul-off speed, and cutter count from one screen.
This station view matters when a buyer plans the factory floor. The corrugator is the longest station and fixes how much line length the builder must reserve. The cooling tank adds another length that grows with diameter. Faygo supplies a layout drawing that shows the exact footprint for each model so the buyer can confirm the hall size before ordering.
A threading bellows line differs from a plain corrugated pipe line mainly in the compound and the end use. The same hardware makes garden edging or washing-machine drain hose, but electrical conduit demands a flame-retardant grade and a clean inner bore so wires slide without snagging. The die and the corrugator blocks are therefore selected for a smooth inner surface and a tight wall tolerance rather than for maximum output.
Output is expressed two ways on the spec sheet. Mass output is kilograms of PVC per hour. Lineal output is meters of conduit per minute. A thin 16 mm conduit runs at high meters per minute but low kilograms per hour, while a thick 200 mm conduit runs the opposite way. Buyers should read both numbers because the plant labor and the coil length depend on meters per minute, while the resin cost depends on kilograms per hour.
The corrugation geometry also sets how the conduit behaves after it leaves the line. A shallow corrugation keeps the outer diameter close to nominal and simplifies clip selection, while a deep corrugation improves crush resistance at the cost of a larger profile. Project drawings usually fix the nominal diameter, so the corrugator blocks are selected to hold that diameter within the wall tolerance the installer expects. When the same building uses several conduit sizes, the line owner keeps one block set per size and swaps them during a product changeover.
Wall thickness is another decision made at the die, not in the field. Thin-wall conduit saves material and weight for short indoor-adjacent runs, while thick-wall conduit resists heavier knocks on exposed industrial facades. The extruder output and the haul-off speed are balanced so the wall stays uniform along the coil, because a varying wall is the main cause of weak spots that crack when clipped tight.
Why Outdoor Wall-Mounted Wiring Needs Corrugated Conduit
Exposed wires on an exterior wall face rain, sunlight, wind-blown debris, and physical knocks from ladders or tools. A corrugated PVC conduit wraps those wires in a continuous protective sleeve that keeps moisture out of the conductor path and prevents accidental contact.
Wall mounted runs are rarely straight. Conduit that is too stiff needs many fittings; corrugated conduit bends by hand and hugs the wall with a few clips. The ridged surface also grips mounting saddles, so the line stays put without slipping.
Compared with rigid metal conduit, PVC threading bellows is lighter, non-corrosive, and easier to cut on site with a simple blade. Compared with smooth PVC pipe, the corrugated version bends without elbows, which cuts installation time on irregular facades.
| Protection Method | Bend Flexibility | Corrosion Resistance | On-Site Cutting |
|---|---|---|---|
| PVC corrugated conduit | Alto | Excellent | Easy |
| Rigid PVC pipe | None | Excellent | Tool needed |
| Metal conduit | Low | Needs coating | Tool needed |
I codici di costruzione in molte regioni richiedono che i cavi a bassa tensione e di potenza siano installati in un contenitore classificato. Un condotto in PVC corrugato prodotto su una linea Faygo soddisfa questa richiesta per i collegamenti esterni tipici delle pareti, mantenendo al contempo bassi i costi della lista di materiali.
The economics of wall routing also favor corrugated conduit on renovation jobs. When wires must run along an existing facade, the installer cannot chase a channel into the wall, so a surface-mounted conduit is the only option. A flexible corrugated product follows the wall without a long chain of elbows, which keeps the labor hours low and the visual line clean. On new builds, the same conduit pre-installed on the wall before the roof is closed protects temporary power runs during construction.
The temperature swing on an exterior wall is wider than indoors. Summer sun can push a dark conduit surface well above the air temperature, while winter nights drop below freezing. Rigid PVC keeps its shape across this range because its Temperatura di ammorbidimento di Vicat sits around 80 C and its low-temperature brittleness is managed by the compound recipe. A UV-stabilized outer layer stops the surface from chalking, which would otherwise weaken the wall where the saddle grips.
The protection need also changes with the wire type. Low-voltage garden lighting draws little heat, so a thin conduit is enough. A run that carries main-voltage branch circuit cables must keep the conductors separated from contact and from the wall surface, so a thicker conduit with a larger inner bore is specified. The line maker sizes the die mandrel to that bore, which is why a project that mixes wire sizes often keeps two conduit diameters in stock rather than forcing one size for every run.
Wind load is a second outdoor factor. A long vertical run on a tower facade flaps under gusts unless the saddle spacing is tight. The corrugated surface helps because the saddle grips the ring valley instead of a smooth round wall, so the conduit resists rotation and slip. Specifiers therefore treat conduit diameter, saddle spacing, and corrugation profile as one package rather than three separate choices.
Surface color is a practical, not cosmetic, decision. Light gray and white conduit stay cooler in sun than black, which matters on south-facing walls in hot climates. The pigment is added in the compounding step, and the same line can run different colors by swapping the masterbatch. Faygo sets the color in the stored recipe so a repeat order matches the first batch.
How the Extrusion Line Forms the Bellows
The line starts with a gravimetric or volumetric feeder that meters rigid PVC powder blend into the extruder throat. A single-screw extruder then plasticizes the material inside a heated barrel and pushes the melt through a die that forms a thin-walled tube.
Immmediatamente dopo la matrice, il tubo caldo entra nella corrugatrice. La corrugatrice contiene due catene continue di blocchi di formaggio che si chiudono intorno al tubo e lo stringono in un profilo a anello. La geometria dei blocchi determina il passo e la profondità della corrugazione, che controllano la flessibilità e la resistenza alla compressione.
After forming, the pipe passes a spray cooling or vacuum sizing section that locks the shape. A haul-off pulls the pipe at a steady speed, and a cutter slices it to length. The intelligent control system lets the operator set parameters and adjust them in real time.
Because rigid PVC is heat sensitive, the screw and barrel must control shear and temperature closely. Faygo lines use internationally renowned brand electrical components and a closed-loop control system to hold melt temperature within a narrow band across the full L/D.
The forming step begins while the tube is still soft. The die delivers a tube with a small air pressure inside, which supports the wall against collapse as it leaves the die lip. That internal air cushion is held constant by a pressure controller, because a falling pressure lets the tube stick to one block face and produces a flat spot. The corrugator blocks then close on the pressurized tube and stamp the ring shape.
Ring depth is not uniform across all conduit sizes. Small 16 mm to 25 mm conduit uses a shallow ring so the coil stays compact and the outer diameter stays near nominal for clip selection. Large 110 mm to 200 mm conduit uses a deeper ring so the wall carries soil or impact loads where the run drops to the ground. The block set is the single part that encodes this geometry, which is why Faygo ships one block set per diameter in a multi-size plant.
Throughput on the forming station is set by the chain speed. Faster chains mean more rings per minute but also less dwell time in each block, so the melt must be cooler and more rigid to release cleanly. The operator tunes chain speed together with melt temperature, and the control system keeps the ratio inside the window proven during the 72-hour pre-delivery test.
After the corrugator the pipe still carries heat from the die and from the block friction. If it enters the cooling tank too hot, the rings can relax and lose definition. Faygo sizes the gap between the corrugator exit and the first cooling pass so the surface sets before the shape can drift, which is part of the line balance a buyer receives with the layout drawing.
Faygo Lines Built for Electrical Conduit
Faygo offre due linee di prodotti che coprono la gamma di dimensioni dei condotti utilizzati nella costruzione di protezione del filo elettrico montato su pareti esterne. La linea a falde corrugate a singola parete produce faldoni flessibili da 6 mm a 200 mm, mentre la linea di produzione di tubi in PVC produce condotti rigidi più grandi.
Faygo PE/PP/PVC Single-Wall Corrugated Linea di estrusione tubi
This line is the primary machine for threading bellows. It runs PVC, PE, and PP in single-wall corrugated form and covers diameters from 6 mm to 200 mm. For electrical conduit, PVC is the standard material because of its flame behavior and weatherability.
| Parametro | FXC-S (small) | FXC-L (large) |
|---|---|---|
| Pipe Dia | 6-40 mm | 50-200 mm |
| Screw Ø | 45 mm | 65-75 mm |
| L/D | 30:1 | 30:1 |
| Output | Up to 80 kg/h | Up to 150 kg/h |
| Line Speed | Up to 18 m/min | Up to 12 m/min |
| Power | 37 kW | 75 kW |
The FXC-S variant suits thin conduit for telephone, network, and low-voltage garden lighting. The FXC-L variant covers heavier 110 mm to 200 mm conduit used to bundle multiple power cables on factory or apartment exteriors.
The corrugator on the FXC line is a horizontal type, which keeps the line height low and simple to service. The block chains run on precision rails so the ring pitch stays constant along the full coil. A servo-driven haul-off matches the chain speed within a few percent, which prevents stretch marks on the wall.
Drive choice follows the diameter. The FXC-S uses a smaller main motor and a single-zone barrel heater set, which keeps the power draw near 37 kW. The FXC-L uses a larger motor and a two-zone or three-zone heater set so the bigger screw holds a stable melt across its longer L/D. Both use the same intelligent control screen, so an operator trained on one can run the other.
Coiling is the standard take-up for conduit up to about 40 mm. The line rewinds the pipe onto a reel so installers pull it from a drum on site. Above 40 mm the pipe is cut into lengths because a reel would be too heavy to move. The cutter shifts between reel and length mode by a setting in the control system, with no hardware change for the smaller model.
Faygo Linea di produzione di tubi in PVC for Rigid Conduit
When the project calls for larger rigid conduit rather than flexible bellows, the Faygo PVC pipe production line produces UPVC pipes with large diameters and different wall thickness. Wall thickness reaches up to 6.5 mm in the broader Faygo pipe program.
| Parametro | PVC Pipe Line |
|---|---|
| Pipe Dia | 16-200 mm |
| Screw Ø | 55-80 mm |
| L/D | 28:1-33:1 |
| Wall Thickness | Up to 6.5 mm |
| Output | Fino a 250 kg/h |
| Power | 90 kW. |
Both lines share the same intelligent control system, the same 72-hour pre-delivery test, and the same CE and ISO certification. Wanplas, the parent brand, supplies matched auxiliary equipment such as loaders, mixers, and chillers for a complete turnkey layout.
The PVC pipe production line adds a vacuum sizing sleeve and a longer spray cooling tank because solid-wall pipe needs forced roundness, not just block-formed shape. The sizing sleeve pulls the hot pipe against a cooled mandrel with vacuum, then the tank fixes the diameter. This station is the main reason the rigid line needs more floor length than the corrugated line.
For buyers who run both flexible bellows and rigid conduit, Wanplas can link the two lines through a shared material preparation room. One high-speed mixer feeds both extruders, which reduces the number of operators and keeps the compound recipe identical. The shared room also simplifies quality records because one batch log covers both products.
Power and water are the two plant services to plan early. The corrugated line draws its power mainly at the extruder motor and the corrugator drive. The cooling system draws water, which a chiller or a cooling tower returns to the tank. Faygo lists the water flow and the power peak on the layout drawing so the buyer can size the supply before the machine arrives.
PVC Material and Conduit Properties
Il PVC rigido per condotti è un composto, non una singola resina. La resina di base PVC è miscelata con un stabilizzatore al calore, un lubrificante, un agente ignifugo e spesso un stabilizzatore UV per l'uso all'aperto. La ricetta esatta determina le prestazioni finali del fusto di filatura.
The table below lists typical property targets for conduit-grade PVC. Values are representative of building-wire conduit compounds and should be confirmed against the local standard before specification.
| Proprietà | Valore tipico | Benefit for Wire Protection |
|---|---|---|
| Density | 1.38-1.45 g/cm3 | Light wall load |
| Tensile strength | 40-55 MPa | Resists pull damage |
| Impact strength | Good at room temp | Survives knocks |
| Temperatura di ammorbidimento di Vicat | About 80 C | Stable in sun heat |
| Flame retardancy rating | Common building grade | Slows fire spread |
| Weatherability | UV-stabilized | Outdoor durable |
Melt flow rate (MFR) of the compound is kept low so the melt has enough strength to hold the corrugation through the die and corrugator. A high MFR grade would sag and lose ring definition, which weakens the conduit wall.
For outdoor wall mounted runs, the UV stabilizer is not optional. Without it, rigid PVC loses surface color and surface toughness after a few seasons of direct sun. Faygo recommends a UV-grade masterbatch for any conduit that stays above ground.
The heat stabilizer is the part that protects the resin during extrusion, not just in service. Rigid PVC releases hydrogen chloride if it overheats, and that acid attacks the screw and the barrel. A calcium-zinc or tin-based stabilizer captures the acid and keeps the melt stable through the long L/D. The choice of stabilizer also affects the food-contact and RoHS status of the compound, which a buyer should confirm for the target market.
Lubricants split into internal and external types. Internal lubricant lowers the melt friction inside the barrel so the screw can push more material at lower torque. External lubricant reduces the melt stick to the barrel wall and the die so the pipe leaves cleanly. The balance of the two sets the output ceiling and the surface gloss, which is why the recipe is part of the line commissioning, not a separate lab task.
Filler level is a cost and performance lever. Adding calcium carbonate filler lowers resin use and raises stiffness, but too much filler drops impact strength and makes the conduit brittle in cold. Faygo advises a filler level that keeps the impact rating above the project minimum while still controlling material cost. That balance is recorded in the line recipe so every shift runs the same compound.
La classe ignifuga è la proprietà che distingue il condotto elettrico dal tubo corrugato ordinario. Il sistema di additivi rallenta l'ignizione e limita la diffusione del fuoco lungo il condotto. Il nome esatto della classificazione varia a seconda della regione, quindi Faygo fornisce la ricetta del composto con la via di prova che il compratore deve seguire localmente. La stessa linea può funzionare con un condotto non ignifugo per usi non elettrici commutando il masterbatch.
Specifications and Selection Criteria
Selecting a PVC threading bellows extrusion machine means matching three variables: the conduit diameter, the output target, and the wall thickness. Diameter drives the screw size and corrugator block size. Output drives motor power and cooling length.
La seguente tabella mostra come una linea corrugata a una parete differisce da una linea corrugata a due pareti e da una linea in tubo di PVC rigido per lo stesso lavoro di condotte. La scelta cambia sia il livello di costo della macchina che il comportamento di installazione del prodotto finito.
| Line Type | Wall | Flexibility | Best Use |
|---|---|---|---|
| Single-wall corrugated | One | Alto | Wall wire routing |
| Double-wall corrugated | Two | Medium | Buried drainage |
| Rigid PVC pipe | Solid | None | Heavy conduit |
Per la costruzione di protezione del filo elettrico montato sulla parete all'aperto, la linea a tubo corrugato a parete singola è la base giusta. Fornisce il comportamento di piegatura e clip che gli installatori aspettano e mantiene il consumo di materiale per metro basso.
Wall thickness selection starts from the mechanical duty. A conduit that only gathers light network cables on a protected porch can use the thin end of the wall range. A conduit on a parking garage soffit that sees car bumps and cleaning equipment needs the thick end. The die gap sets the wall, and the haul-off speed sets how much material lands per meter, so the two are tuned together during setup.
Diameter selection follows the wire fill rule. Most codes limit the conduit fill to a fraction of the inner cross section so the wires do not overheat and can be pulled without damage. A 25 mm conduit may hold two or three small cables, while a 110 mm conduit bundles a full branch circuit with spares. The line maker only needs the target inner diameter; the corrugator block set delivers the outer profile around it.
Il target di uscita determina il diametro del tornito e la potenza del motore. Una centrale che serve un progetto di edilizia locale potrebbe avere bisogno solo di 60 kg/h, che il FXC-S copre. Una centrale che fornisce un distributore regionale potrebbe avere bisogno di 150 kg/h o più, che richiede il FXC-L. Acquistare una linea più grande del fabbisogno costante consuma spazio e energia, mentre acquistare una troppo piccola costringe a lavorare in orario esteso e rallenta la consegna ai clienti stessi.
Colore e marcatura sono gli ultimi elementi di selezione. Alcune regioni richiedono un colore specifico per il potenziale rispetto al basso voltaggio. La linea stampa o incide una marcatura con un'unità separata se il compratore ha bisogno di un ID permanente sulla parete. Faygo imposta la marcatura nella ricetta di controllo in modo che il testo rimanga coerente su tutte le bobine.
Match the Line to Your Project
The table below turns common project needs into a recommended Faygo line. It links conduit diameter, material, and output to the correct product line so buyers can shortlist before requesting a formal quote.
| Necessità | Material | Faygo Line |
|---|---|---|
| 16-40 mm flexible conduit | PVC | FXC-S corrugated line |
| 50-110 mm flexible conduit | PVC | Line corrugata FXC-L |
| 110-200 mm rigid conduit | UPVC | PVC pipe production line |
| Multi-material trials | PE / PP / PVC | FXC-L with spare blocks |
If the plan includes both flexible bellows and rigid conduit, Wanplas can configure a shared extruder base with two downstream sets. That approach lowers the total equipment cost level and simplifies spare parts.
Beyond diameter and material, the buyer should state the daily run length. A line that must produce 5,000 meters per day needs a faster haul-off and a larger cooling tank than one making 1,000 meters. Faygo uses the daily target to size the corrugator chain length and the cutter capacity, which is why the quote asks for output in meters per day, not just kilograms per hour.
Climate affects the cooling design. A plant in a hot region with warm cooling water needs a longer tank or a stronger chiller to reach the same line speed as a plant in a cool region. The layout drawing lists the cooling water temperature the line was tuned for, so the buyer can match the local supply or add a chiller from Wanplas.
Operator skill is a real selection factor. A plant with experienced extrusion staff can run a larger FXC-L at full speed from week one. A plant training new staff may start with the FXC-S and grow into the larger model as the team learns the process window. Faygo training covers both models, so the step-up is smooth when demand rises.
Standards, Installation, and Quality
Electrical conduit must meet local building and fire rules. In many markets, conduit-grade PVC carries a flame retardancy rating and a marking that confirms the grade. Faygo supplies material guidance so the buyer can match the compound to the required standard.
On the wall, installers fix the conduit with plastic saddles spaced at regular intervals, keep bends gentle, and seal the ends with rated fittings. The corrugated surface holds the saddle without slipping, which keeps the run tidy along brick or concrete.
Faygo quality control starts before shipment. Every line runs a 72 ore di operazione continua test, uses internationally renowned brand electrical components, and leaves the factory CE and ISO certified. The intelligent control system stores recipes so the same conduit can be repeated shift after shift.
Installation on the buyer’s site follows a fixed sequence. First the line is leveled on the prepared foundation. Then the electrical cabinet is connected by a certified electrician. Then the cooling water and air lines are hooked up. Only after these checks does Faygo commission the line with a real PVC run and a sample coil. This sequence prevents the common mistake of starting the extruder before the cooling is ready, which scorches the first meters.
The corrugator blocks need a break-in run. New blocks grip the melt tightly, so the first short run uses a slightly lower chain speed to seat the surfaces. After a few hours the speed rises to the rated value. The 72-hour test already covers this on the Faygo floor, but the buyer’s first shift should still watch the ring definition before pushing full output.
Wall mounting of the finished conduit is a field step, not a line step, but it decides whether the product performs. Installers drill the saddle into the wall at the spacing the conduit rating allows, push the wire, then close the clip. The corrugated valley gives the saddle a positive seat, so the run stays straight even on a slightly uneven brick face. Faygo documents the recommended saddle spacing in the product guide shipped with the line.
Service and Factory Assurance
Faygo delivers more than a machine. The factory provides customized turnkey solutions that cover selection, design, manufacturing, installation, commissioning, training, and maintenance. For new plants, Faygo also advises on water and electricity design, factory site layout with 3D workshop planning, and worker configuration.
Dopo la consegna, il supporto include assistenza tecnica 24 ore su 24, una garanzia che copre i componenti danneggiati e 500 ricambi gratuiti all'anno. La politica di fabbrica aperta di Wanplas accoglie gli acquirenti per ispezionare la produzione e eseguire un test di campionamento prima di impegnarsi in un ordine completo.
La sostituzione di macchine vecchie viene gestita con una via di aggiornamento senza interruzione, e i progetti di espansione della capacità mirano al punto di blocco per raddoppiare la produzione senza ricostruire l'intera officina. Questi servizi si applicano a tutto il programma di tubi e profili di Faygo.
Corrugator Forming Blocks e design del passo
La corrugatrice è la sezione che effettivamente crea la forma dei faldoni, quindi i suoi blocchi di formaggio decidono il comportamento finale del condotto. Ogni blocco è un master superiore e inferiore trasportato su due catene continue. Quando il tubo caldo entra, i blocchi si chiudono e stringono la parete in un profilo a anello, poi si aprono per rilasciare il tubo formato.
Il passo è la distanza tra due picchi di corrugazione. Un passo corto dà molti piccoli anelli, che rendono il condotto più flessibile e più facile da piegare a mano intorno ad un angolo della parete. Un passo lungo dà meno anelli più profondi, che aumentano la rigidità degli anelli ma riducono la flessibilità. I canali d'acqua all'interno dei blocchi prelevano il calore dalla fusione in modo che la corrugazione si stabilisca prima che il tubo lasci la corrugatrice.
Conoscere i difetti comuni salva il tempo su una linea di condotti. La maggior parte dei problemi deriva dalla temperatura della fusione, dalla velocità dell'asta o dallo stato dei blocchi piuttosto che da una falla hardware importante.
Faygo supplies spare block sets so a buyer can switch corrugation profiles without buying a second corrugator. The intelligent control system synchronizes chain speed with extruder output so the block pitch stays constant down the full length of the coil.
Cooling, Calibration, and Cutting
After the corrugator, the pipe is still warm and must be locked to size. A spray cooling tank or a vacuum sizing section removes the remaining heat. For single-wall corrugated conduit, the shape is already fixed by the blocks, so calibration focuses on cooling rather than forcing a round profile.
Cooling rate changes the pipe properties. Too fast a quench can leave internal stress that shows up as brittleness in cold weather. Too slow a cool limits line speed and output. Faygo tunes the tank length to the diameter so the pipe leaves at a stable temperature.
The haul-off is a caterpillar type that grips the corrugated surface without crushing it. Steady pull keeps wall thickness uniform. At the end, a cutter slices the pipe: small conduit uses a fly-knife cutter for clean, fast cuts, while large rigid conduit uses a planetary cutter for a square end face.
Length tolerance depends on the encoder and the haul-off sync. For conduit sold by the coil, the line rewinds the pipe instead of cutting, which suits long wall runs that installers pull from a drum.
PVC Compounding Steps for Conduit
Conduit quality starts in the mixer, not at the die. Rigid PVC is a dry blend of resin, heat stabilizer, lubricant, filler, flame retardant, and often a UV stabilizer for outdoor use. The order of addition and the mixing temperature set how well these parts combine.
The standard sequence loads PVC resin first, then the heat stabilizer and lubricant, then filler and additives. A high-speed mixer heats the blend to about 110 C to 120 C, which fuses the lubricant onto the resin surface. A cooling mixer then drops the batch below 40 C before it enters the extruder throat.
Wrong order causes plate-out, where additives coat the barrel and die and streak the pipe surface. Wanplas, the parent brand, supplies matched high-speed mixers and cooling mixers so the blend stays consistent from batch to batch.
For outdoor wall mounted conduit, the UV stabilizer is added in this step. Skipping it to save cost leads to chalking and surface cracking after one or two summers of sun, which shortens the service life of the whole protection system.
Troubleshooting Common Defects
Il test pre-trasporto di 72 ore su ogni linea Faygo cattura la maggior parte di questi problemi prima della spedizione, ma una lista di verifica di avvio scritta mantiene l'operatore allineato con la finestra di processo qualificato.
| Defect | Likely Cause | Fix |
|---|---|---|
| Weak corrugation | Low melt strength | Raise torque, lower temp |
| Oval after laying | Low ring stiffness | Deeper corrugation |
| Surface streaks | Plate-out | Clean barrel, check stabilizer |
| Burning smell | Excess shear | Lower screw speed |
| Uneven holes | Dull punch | Sharpen or replace |
Il lavoro è basso: uno o due operatori gestiscono la fornitura, la monitoraggio e il confezionamento su una linea standard. L'overhead copre la fabbrica, il test di 72 ore e il sistema di qualità CE e ISO che Faygo costruisce in ogni macchina.
Piano di manutenzione e ricambi
A conduit line runs best on a simple, regular care plan. Daily checks cover melt pressure, barrel zone temperatures, and chain lubrication on the corrugator. Weekly checks tighten block bolts and inspect the haul-off belts for wear.
Monthly work inspects screw and barrel wear by measuring output at a fixed speed. Annual service aligns the corrugator chains and checks the cutter accuracy. Catching wear early avoids a sudden stop during a large order.
Faygo supports this plan with USD 500 free spare parts per year, which covers wear items such as seals, blades, and sensors. The Wanplas open-factory policy lets buyers stock the right parts by seeing the line run before they buy.
Remote support runs through the control system, so a Faygo engineer can read process data and guide a local technician through most adjustments without a site visit. That keeps the line running between scheduled service windows.
Production Cost Levels and Payback
The cost to make conduit splits into material, energy, labor, and overhead. Material is the largest share because rigid PVC resin makes up most of the pipe weight. Energy comes mainly from the extruder motor and the cooling system.
L'energia per metro di condotto diminuisce quando la linea funziona più vicino alla velocità nominale, perché l'overhead di luci, gabinetto di controllo e pompe si distribuisce su più prodotti. Faygo regola le zone del riscaldatore del cilindro per mantenere la temperatura con il meno possibile energia, e il controllo a circuito chiuso evita i cicli di riscaldamento ripetuti che sprecano energia durante le corse di stop-start.
Cost levels run from Low for thin small-diameter conduit to High for large rigid conduit with thick walls. Payback depends on the local conduit selling price and the daily output the line sustains. A Faygo turnkey layout shortens installation time, so the line reaches full output sooner.
Buyers should size the line to steady demand rather than peak demand. A smaller line run at high utilization beats a larger line that sits idle, and it lowers the total equipment cost level at the start.
Energy Use and Operator Workload
The largest energy draw on a threading bellows line is the extruder motor, which turns electrical power into melt heat and pressure. The corrugator drive and the haul-off add a smaller load. A 37 kW FXC-S draws roughly that motor rating at full output, while the 75 kW FXC-L doubles it. The cooling system adds pump power that depends on tank size and water temperature.
Operator workload stays low because one person can manage feeding, monitoring, and coil change on a standard line. The intelligent control system alarms on melt pressure drift and haul-off fault, so the operator reacts to warnings rather than watching every gauge. A second operator helps only on length-cut lines where heavy pipes are bundled at the exit.
L'uso dell'aria è un altro servizio da pianificare. La corrugatrice e la matrice richiedono un fornitura costante di aria compressa per la pressione interna del tubo e per il raffreddamento dei blocchi dove l'acqua non viene utilizzata. Il disegno della disposizione elenca il flusso e la pressione dell'aria in modo che il compratore dimensioni il compressore. Un fornitura di aria stabile è altrettanto importante della stabilità dell'energia, perché un calo di pressione marca la parete del tubo per il resto della bobina.
Faygo spedisce parti di ricambio gratuite per un valore di 500 USD all'anno, che copre gli articoli di piccole dimensioni che falliscono per primo: guarnizioni, sensori, lame e sezioni della cinghia. Il compratore conserva queste parti dalla visita in fabbrica aperta, dove gli stessi articoli vengono mostrati in funzione sulla linea di dimostrazione. Un piccolo scaffale di parti accanto alla linea riduce il tempo di fermo da ore a minuti quando una cinghia si rompe.
Spare Parts and Long-Term Care
Long-term care focuses on the wear parts that touch the melt and the moving chain. The screw and barrel wear slowly with abrasive filler, so output at a fixed speed is the early warning sign. The corrugator chains and block hinges wear with use, so chain tension and block alignment are checked each month. The cutter blade dulls with every cut, so a spare blade keeps the end face square.
Quando il mix di prodotti cambia, la linea viene ri-commissionata con la nuova ricetta e il set di blocchi piuttosto che funzionare a ceglie. Faygo documenta la lista di verifica del cambio di modo in modo che l'operatore registri le impostazioni vecchie e nuove, che mantiene il registro di qualità pulito e l'ordine di ripetizione successivo pronto per iniziare.
The control system logs process data, so a Faygo engineer can read it remotely and spot a drift before it becomes a defect. This remote view lets the buyer plan a service visit instead of waiting for a breakdown. Catching a falling melt pressure early protects the screw, which is the most expensive part to replace.
Un tubo filtrante è specificato da quattro numeri: diametro, classe di parete, area di apertura e larghezza di slot. Il diametro determina il volume di flusso. La classe di parete determina la carico di suolo che sopporta. L'area di apertura determina quanto acqua entra per metro. La larghezza del slot determina quale grado di suolo rimane fuori. La linea di estrusione controlla i primi tre direttamente; la larghezza del slot viene impostata dall'unità di perforazione e dalla scelta di applicazione sul campo.
Regulatory Standards for Electrical Conduit
Electrical conduit must meet the building and fire rules of the market where it is installed. Common references include CE and ISO 9001 for the manufacturing system, and product standards such as IEC 61386 for conduit systems and UL 651 for rigid non-metallic conduit.
For the compound, RoHS and REACH limit hazardous substances in the additives, which matters when the conduit is used in or near occupied buildings. The flame retardancy rating is confirmed by a test on the finished compound, not just on the base resin.
Faygo ships every line CE and ISO certified and advises on the material grade needed for the target standard. The buyer still confirms the local marking before specifying, because acceptance rules differ by region and by project type.
Wanplas, the parent brand, aligns quality promises across its factory network, so a Faygo conduit line meets the same documented quality bar as the rest of the group’s pipe and profile program.
Domande frequenti
What is a PVC threading bellows extrusion machine?
Si tratta di una linea di estrusione di tubi che forma condotti flessibili e corrugati in PVC, utilizzati per il tracciamento e la protezione dei cavi elettrici sulle pareti esterne. La linea è composta da un estrattore a singola scatola, un corrugatore con blocchi formativi, una sezione di raffreddamento e un tagliatore.
Why use PVC corrugated conduit outdoors?
Rigid PVC corrugated conduit resists moisture, sunlight, and impact while staying light and easy to cut. It keeps wires organized on exposed walls and meets common building electrical protection rules.
Which Faygo line makes threading bellows?
The Faygo PE/PP/PVC single-wall corrugated pipe extrusion line covers diameters from 6 mm to 200 mm and is the standard choice for electrical conduit. Larger rigid conduit uses the Faygo PVC pipe production line.
What screw diameter fits PVC conduit?
A 45 mm to 75 mm single screw with an L/D near 30:1 plasticizes rigid PVC reliably. Smaller conduit runs on the lower end, while 110 mm to 200 mm conduit needs the larger screw.
Is the conduit flame retardant?
Yes. Rigid PVC conduit is compounded with a flame retardant and reaches common flame retardancy ratings for building wire protection. Always confirm the local standard before specifying the grade.
How does Faygo assure line quality?
Every line passes a 72 ore di operazione continua test before delivery, uses internationally renowned brand electrical components, and ships with CE and ISO certification plus 500 pezzi di ricambio gratuiti all'anno.
Can the line make other corrugated pipes?
Yes. With a material change and forming blocks, the same line produces PE and PP single-wall corrugated pipes for drainage, cable protection, and automotive harness sleeves.
Conclusione
A PVC threading bellows extrusion machine is the practical answer for outdoor wall mounted electrical wire protection construction. Faygo, a Wanplas factory with 22 years of pipe and profile experience, builds both the single-wall corrugated line and the rigid PVC pipe line that cover conduit from 6 mm to 200 mm. Every line is CE and ISO certified, tested for 72 hours before shipment, and backed by 500 pezzi di ricambio gratuiti all'anno. Send your conduit diameter, material, and output target to receive a tailored line configuration, schedule a factory audit, or book a sample trial run.
