What a PVC Door and Window Sealing Strip Co-Extrusion Line Delivers
A PVC door and window sealing strip co-extrusion line is a dedicated profile extrusion system that forms weather stripping in a single, continuous pass by joining a rigid or semi-rigid PVC carrier with a soft sealing lip made from thermoplastic elastomer or a soft PVC compound. The result is a finished gasket that no longer needs to be assembled from two separate parts: the mounting base, which locks into the profile groove, and the flexible lip, which compresses against the frame to block wind, water, dust, and noise. For architectural aluminum, uPVC, and wooden door and window systems, this integrated strip is the difference between a window that leaks on the first storm and one that stays tight for decades.
Faygo, a Wanplas factory, has spent 22 years building pipe and profile extrusion systems, and its FAYGOPLAST platform in Zhangjiagang covers 26,650 square meters with three specialized factories. The sealing strip co-extrusion line described here is built on the same profile extrusion knowledge that Faygo applies to PVC window profiles, decorative profiles, and custom extrusions, then extended with a second extruder and a co-extrusion die so that hard and soft materials fuse at the die land rather than being glued afterward. Every line leaves the factory after a 72 saat süren çalışma testi and is CE and ISO certified.
Bu makale, hat nasıl yapılandırıldığını, her bölümün ne işe yaradığını, hangi band geometrisinin hangi makine düzenine uyduğunu, malzemelerin ve hava direncinin nasıl etkileştiğini, tek malzeme ekstrüzyon ile birlikte ekstrüzyonun nasıl karşılaştırıldığını, ve belirli mimari profili için doğru yapılandırmayı seçmeyi açıklamaktadır. Ayrıca, Çin ve uluslararası düzeyde kapı ve pencerelerin sızdırmazlık bantlarını yöneten standartları da ele almaktadır ve makale, seçme kılavuzu, uygulama endüstrileri, hizmet desteği ve sıkça sorulan sorular ile sona ermektedir.
İçerik tablosu
Bu sayfadaki bir bölüme atlamak için aşağıdaki bağlantıları kullanın:
- What a PVC door and window sealing strip co-extrusion line delivers
- How the co-extrusion process works step by step
- Typical production line configurations and technical specifications
- Strip types and the machine configuration they require
- Materials, weather resistance, and UV performance
- Co-extrusion versus single-material extrusion
- Faygo PVC profile co-extrusion product spotlight
- Selection guide: matching demand to configuration
- Application industries and end products
- Standards, quality control, and weather resistance testing
- Installation, commissioning, and service support
- Frequently asked questions
- Talk to Faygo about your sealing strip line
How the Co-Extrusion Process Works Step by Step
Co-extrusion is the simultaneous extrusion of two or more polymer melts through a shared die so that they bond at the interface while still molten. For a door and window sealing strip, the line normally carries one parallel twin-screw extruder for the PVC carrier and one single-screw extruder for the soft TPE or soft PVC lip. Both melts meet inside a co-extrusion die where the flow channels are balanced so the two materials joint without delamination, then the combined profile enters the calibration and cooling section as one piece.
The full sequence from raw material to cut strip runs as follows:
1. Material preparation and feeding.PVC bileşiği, kaybı ağırlık besleme cihazı veya hacim besleme cihazı aracılığıyla çift-çubuk silindirine, TPE veya yumuşak PVC ise ayrı bir kurutucu veya konveyörden tek-çubuk silindirine beslenir. Rigid taşıyıcılar için PVC genellikle kalsiyum-zinc stabilize bir bileşik olup, yumuşak dudakta TPE-S, TPV veya plastikize edilmiş yumuşak PVC gibi termoplastik elastomerler kullanılır. Besleme doğruluğu önemlidir, çünkü dudak-üst bağlantı oranı, gasketin son kompresyon ve geri dönüş davranışını belirler.
2. Plasticizing in the barrels.Paralel dönen ikiz-şaftlı silindir içindeki PVC, 175 ila 200 santigrat derece sıcaklıkta karıştırılır, plastize edilir ve homojenize edilir. Tek şaftlı silindir, yumuşak malzemeyi daha düşük bir sıcaklıkta plastize eder, genellikle 160 ila 185 santigrat derece, elastomerin termal bozulmaktan korunması için. Şaft tasarımı, L/D oranı ve silindir sıcaklık profili, her iki malzemenin aynı viskozitede die'ye ulaşması için ayarlanır.
3. Co-extrusion die.Die, hattın kalbidir. İki erimiş akış alır ve onları birleştirir, böylece yumuşak dudak, sert temel üzerine kapatılır veya laminasyonlanır. İyi tasarlanmış bir die, kesmeyi düşürür, PVC'nin bozulabileceği durgun alanları önler ve operatörün, tek şaft çıkışını değiştirerek dudak kalınlığını bağımsız olarak ayarlayabilmesini sağlar. Çok odalı die, birbirinin yanında birkaç şerit oluşturabilir ve verimliliği artırabilir.
4. Vacuum calibration and cooling. Directly after the die the profile passes through a vacuum calibration table. A vacuum calibration sleeve fixes the outer dimensions of the rigid base to tight tolerances while spray or bath cooling sets the shape. For sealing strips the critical dimension is the barb or bulb that locks into the profile groove, so the calibration sleeve is engineered to hold that feature within a fraction of a millimeter.
5. Taşıma çıkarma.Bir caterpillar, yumuşak dudakları ezmeden bantı kavrayarak ileri doğru sürükler. Çünkü yumuşak dudakta çok az esneklik vardır, caterpillar, geniş bir bant veya çift yol tasarımı kullanarak genişliğe göre eşit basınç uygular. Hattı hızı, çıkış için ana tekerlek olup, soğutma kapasitesi ve dudakın erime mukavemetine bağlı olarak ayarlanır.
6. Kesme ve toplama.Servo kontrolü ile çalışan bir uç bıçağı veya sabit uzunluklu kesici, sürekli bandı bobinlere veya uzunluklara ayırır. Otomatik penceranın üretimi için band, genellikle rulolara sarılır; yer değiştirme pazarında contalar için ise kesilir. Kesilen parçalar sonra kontrol edilir, paketlenir ve sonraki işlem için taşınır.
Typical Production Hat Sistemi Konfigürasyonus and Technical Specifications
A sealing strip co-extrusion line is scaled by strip width, lip complexity, and required output. The table below shows three representative configurations that Faygo builds on the FAYGOPLAST profile platform. These are configuration classes rather than fixed model codes; each line is engineered to the customer’s strip cross-section and target output.
| Parametre | Compact line | Standard line | High-output line |
|---|---|---|---|
| PVC carrier extruder | Parallel twin-screw 51 mm | Parallel twin-screw 65 mm | Parallel twin-screw 65 mm, high torque |
| Soft lip extruder | Single-screw 30 mm | Single-screw 45 mm | Single-screw 45 mm, twin feed |
| Screw L/D ratio | Twin 40:1, single 25:1 | Twin 44:1, single 28:1 | Twin 48:1, single 30:1 |
| Co-extrusion die | Single or double cavity | Double or four cavity | Four or six cavity |
| Strip width range | 6 to 20 mm | 10 to 35 mm | 15 to 50 mm |
| Calibration table length | 3 m vacuum | 4 to 6 m vacuum | 6 to 9 m vacuum |
| Line speed | 1 to 4 m/min | 2 to 6 m/min | 3 to 10 m/min |
| Combined output | 40 to 70 kg/h | 70 to 120 kg/h | 120 to 200 kg/h |
| Haul-off type | Belt caterpillar | Wide belt caterpillar | Dual-track servo |
| Cutter | Fixed-length saw | Servo fly knife | Servo fly knife, multi-station |
| Control system | PLC plus HMI | PLC plus HMI, inverter drives | PLC plus HMI, servo with data logging |
| Certification | CE, ISO | CE, ISO | CE, ISO |
Yukarıdaki sayılar, konfigürasyon aralıklarıdır. Faygo, müşterilerin band kesit çizelgesi ve dakika başına hedef metreleri alındıktan sonra, kesme makinesinin kesme çapı, die boşluğu sayısı ve hattı hızı ayarlanır. Hattı, sabit bir paket değil, bir profilden oluşan bir sistem olduğu için, aynı çekme ve kesici, farklı die'ler için hizmet edebilir, bu da alıcıyı bir band tasarımına bağlı kalmaktan korur.
Strip Types and the Machine Configuration They Require
Architectural sealing strips come in several cross-section families, and each family stresses a different part of the line. A wool-pile-free flexible lip wants a clean soft-material channel; a bulb seal wants balanced cooling so the bulb stays round; a fin or flap seal wants a thin lip that needs precise speed control; a multi-chamber carrier wants a stable rigid base. The table below maps common strip types to the machine configuration that produces them reliably.
| Strip type | Base material | Lip material | Recommended extruder set | Die and cooling note |
|---|---|---|---|---|
| Clip-in barb seal | Rigid PVC | TPE or TPV | Twin 51 + single 30 | Tight calibration sleeve for barb |
| Bulb weather seal | Rigid or semi-rigid PVC | Soft PVC or TPE | Twin 65 + single 45 | Symmetric cooling to keep bulb round |
| Fin or flap seal | Rigid PVC | Soft PVC | Twin 51 + single 30 | Low shear die, precise speed control |
| Multi-chamber carrier | Rigid PVC | TPE at one edge | Twin 65 + single 45 | Longer calibration, stiff base cooling first |
| Dual-lip compression seal | Semi-rigid PVC | TPE-S both lips | Twin 65 + single 45 twin feed | Two soft channels balanced in die |
| Wiper blade seal | Rigid PVC | Soft PVC | Twin 51 + single 30 | Thin lip needs steady haul-off tension |
When a customer already produces single-material PVC strips and wants to add a soft lip, the cheapest upgrade is usually a single-screw extruder plus a co-extrusion adapter and a new die, reusing the existing calibration table and haul-off. Faygo’s turnkey team reviews the current layout before recommending whether to add a second extruder or replace the line, which is where the selection guide in a later section helps.
Materials, Weather Resistance, and UV Performance
The performance of a sealing strip over its service life is decided mostly by the lip material, because the lip does the compressing and the base only has to hold position. The carrier is almost always a rigid or semi-rigid PVC chosen for dimensional stability and resistance to the groove; the lip is where weather resistance, low-temperature flexibility, and UV stability are won or lost.
| Material | Hardness (Shore A) | Low-temp flexibility | UV and weather resistance | Compression set | Typical use |
|---|---|---|---|---|---|
| Plasticized soft PVC | 55 to 80 | Fair, stiffens below 0 C | Moderate, needs stabilizer | Higher | Indoor and mild-climate gaskets |
| TPE-S (styrenic) | 50 to 85 | Good down to minus 30 C | Good with UV package | Low to moderate | General exterior weather strip |
| TPV (EPDM-like TPE) | 60 to 85 | Excellent, minus 40 C | Excellent, UV stable | Very low | Harsh exterior, long-life seals |
| EPDM rubber | 55 to 80 | Excellent | Excellent | Very low | Premium co-extruded with PVC |
| Rigid PVC carrier | Shore D 70 to 80 | Brittle below minus 10 C | Good with TiO2 | N/A | Mounting base and barb |
For exterior doors and windows the lip should be a TPV or TPE-S with a UV stabilizer package and, for white or colored strips, a titanium-dioxide level that resists chalking. Pure plasticized soft PVC is the lowest-cost option and is acceptable for interior or sheltered gaskets, but it hardens and loses compression recovery faster outdoors, which is why co-extruding a TPE lip onto a PVC base is the common upgrade path. The base itself is typically a calcium-zinc stabilized rigid PVC with titanium dioxide for color retention, so the whole strip stays weather resistant without painting.
Weather resistance is verified by accelerated aging: heat aging to check hardness change, ozone exposure for crack resistance, and a xenon-arc or fluorescent UV cycle to check color and surface change. A strip that passes these tests keeps its seal after years of sun and freeze-thaw cycles, which is exactly what GB/T 12002 and the corresponding ISO guidance require for architectural sealing products.
Regrind handling is part of the material decision. The rigid PVC base can usually accept a controlled percentage of clean in-house regrind from start-up and edge trim without losing groove retention, provided the regrind is free of the soft lip material and is metered back through the loss-in-weight feeder rather than dumped in by volume. The soft lip, by contrast, is rarely reground into the same product because elastomer reprocessing changes hardness and recovery; off-grade soft material is better routed to a less demanding grade or a closed-loop compound stream. Faygo’s recipe system lets the operator set a separate regrind ratio for the base so the line stays consistent run after run. Color matching is another material task: white and foiled strips need a stable titanium-dioxide level and a compatible pigment package, while dark strips need carbon-black grade and loading chosen so the lip does not chalk under UV. Because the base and lip are dosed from separate extruders, each can carry its own color without cross-contamination, which is a quiet advantage of co-extrusion over painting a finished strip after the fact.
Co-Extrusion Versus Single-Material Extrusion
Before co-extrusion became standard, many gaskets were either all-PVC strips or separate rubber lips pushed into a groove after the frame was made. Co-extrusion changes the economics and the performance at the same time. The comparison below helps a buyer decide whether the second extruder and co-extrusion die are worth the added complexity.
| Aspect | Single-material PVC strip | Separate lip inserted later | PVC plus TPE co-extruded strip |
|---|---|---|---|
| Sealing performance | Limited, hard lip | Good if lip stays in | Best, bonded soft lip |
| Process steps | One extruder | Extrude plus assemble | One pass, two extruders |
| Bond reliability | N/A | Can loosen or fall out | Molecular bond at interface |
| Material cost | Low | Orta | Orta |
| Equipment complexity | Low | Low plus assembly | Medium, two extruders and die |
| Weather life | Short outdoors | Orta | Long with TPV lip |
| Atık ve yeniden işleme | Low | Montajdan sonra daha yüksek | Ayarlama sonrası daha düşük |
The practical conclusion is that for any exterior or high-specification architectural profile, co-extrusion pays back through fewer assembly steps and a more reliable seal, while the all-PVC strip stays relevant only for the lowest-cost interior applications. The incremental cost of a second single-screw extruder is small against the labor saved by eliminating a post-assembly insertion step, and the bonded interface removes the most common field failure of inserted lips.
Floor space and utilities shape the decision as much as the hardware. A compact sealing strip line fits a modest bay because the downstream is short: die, a three-meter calibration table, a caterpillar haul-off, and a cutter form a line only a little longer than the profile it makes, with the two extruders mounted side by side at the head. A high-output six-cavity line needs more length for cooling and a wider haul-off, plus a larger chiller and air supply for the vacuum calibration, so the utility plan drawn during Faygo’s factory consulting stage should size the water and power before the machines arrive. The intelligent control system also supports remote monitoring, so a small team can run several lines from one control point, which is why the operating cost stays manageable even when output grows. When a plant later wants to double capacity, the usual path is to add a second line on the same platform rather than to overbuild the first one, keeping spare parts and recipes shared across the shop.
Faygo PVC Profile Co-Extrusion Product Spotlight
Faygo, a Wanplas factory, supplies the FAYGOPLAST profile platform on which this sealing strip line is built. Two product modules are shown below with their specification tables. Both draw on Faygos 22 years of pipe and profile extrusion experience, its 13 national patents including 8 invention patents, and its CE and ISO certified manufacturing. Each line is tested for 72 hours before delivery.
Faygo PVC Door and Window Sealing Strip Co-Extrusion Line
This is the core line for the article topic. It pairs a parallel twin-screw extruder for the rigid PVC carrier with a single-screw extruder for the soft lip, and ships with a co-extrusion die, vacuum calibration table, caterpillar haul-off, and servo cutter sized to the ordered strip width.
| Item | Specification |
|---|---|
| Carrier extruder | Parallel co-rotating twin-screw, 51 or 65 mm, L/D 40 to 48 |
| Lip extruder | Single-screw, 30 or 45 mm, L/D 25 to 30 |
| Drive | İnverter veya servo, uluslararası markalı elektrik bileşenleri |
| Co-extrusion die | Hard plus soft, 1 to 6 cavities, adjustable lip thickness |
| Calibration | Vacuum calibration table 3 to 9 m, water spray and bath |
| Haul-off | Caterpillar, belt or dual-track, speed 1 to 10 m/min |
| Cutter | Servo fly knife or fixed-length saw, coil or length out |
| Control | PLC with HMI, recipe storage, real-time parameter adjustment |
| Output range | 40 to 200 kg/h combined, 1 to 10 m/min line speed |
| Strip width | 6 to 50 mm, custom cross-section supported |
| Teslimat öncesi test | 72 saat süren çalışma testi |
| Certification | CE and ISO certified |
Faygo PVC Window Profil Ekstrüzyon Hattı
Faygo’s broader profile extrusion line produces PVC window profiles, door frames, decorative profiles, and custom extrusions, and shares the same calibration, haul-off, and cutting technology used on the sealing strip line. Buyers who make both frames and gaskets can standardize on one supplier platform and one spare-parts list.
| Item | Specification |
|---|---|
| Ekstrüder | Parallel twin-screw, 51 to 80 mm, L/D 40 to 48 |
| Profile types | Window frames, door frames, decorative, WPC composite |
| Die and calibration | Multi-profile die, vacuum calibration, spray cooling |
| Haul-off | Caterpillar, synchronized with extruder |
| Cutting | Planetary or servo fixed-length cutter |
| Control | Intelligent control, free parameter setting, real-time adjust |
| Output | Scaled to profile weight and line speed |
| Factory base | FAYGOPLAST, Zhangjiagang, 26.650 m², 3 fabrika |
| Certification | CE and ISO certified, 72-hour test |
Her iki modül de turnkey sistem olarak sunulmaktadır. Faygos mühendislik ekibi, die'yi müşterilerin kesit çizelgesinden tasarlar, 72 saatlik testi gerçek band veya profilden gerçekleştirir ve üretim başladığında üretim reçetesi oluşturur.
Selection Guide: Matching Demand to Configuration
The right line depends on strip width, lip material, target output, and whether the buyer already owns profile extrusion equipment. The table below converts common demand statements into a recommended configuration on the Faygo platform.
| Demand | Recommended line | Lip material | Why |
|---|---|---|---|
| Start-up, narrow interior strips | Compact twin 51 plus single 30 | Soft PVC | Lowest entry cost, enough for 6 to 20 mm |
| Standard exterior weather strip | Standard twin 65 plus single 45 | TPE-S with UV package | Balanced output and weather life |
| Harsh climate, long life | High-output twin 65 plus single 45 | TPV or EPDM-like TPE | Very low compression set, UV stable |
| Yüksek hacimli, çok boşluklu | High-output, six-cavity die | TPE-S or TPV | Maximizes meters per minute |
| Already own PVC profile line | Add single-screw plus co-extrusion die | Matches existing base | Reuses calibration and haul-off |
| Frames plus gaskets together | Window profile line plus strip line | Shared PVC base | One platform, one spare-parts list |
If the demand is uncertain, Faygo’s consulting team can model output from the target meters per minute and strip weight, then propose the smallest line that meets it, so the buyer does not pay for unused cavity count or screw diameter. Capacity expansion later is handled by adding cavities or a larger screw rather than replacing the whole line.
Uygulama Endüstrileri ve Son Ürünler
Sealing strips made on this line serve every building envelope that needs a weather barrier. The main application industries are:
Konut ve ticari pencereler. uPVC, aluminum, and wood-aluminum windows use clip-in barb and bulb seals to block air infiltration and rain. A well-made co-extruded strip keeps the frame quiet and dry and cuts heating and cooling loss at the gap.
Entry and balcony doors.Kapı, kayar ve katlanır kapılar, çift dudak ve silgi sıvamaları kullanır. Yumuşak dudak, kapı kolu çukuruna basarken, taban, su geçirmez sızdırmazlık için kapı gövdesinin çukuruna sabit kalır.
Curtain walls and facades. Large glazed facades rely on compression seals between glazing and frame. Because these seals see full sun and wind load, TPV or TPE-S lips are preferred for long service life.
Otomotiv ve taşımacılık. Although this article focuses on architectural profiles, the same co-extrusion technology produces cabin and door seals for vehicles, trains, and buses where low-temperature flexibility and ozone resistance matter.
Endüstriyel ve soğuk depolama kılıfları. Cold rooms and clean rooms need gaskets that stay flexible at low temperature and resist cleaning chemicals, which points to TPV lips on a rigid PVC or co-extruded base.
Güneş ve dış mekan kılıfları. PV module frames and outdoor cabinets use weather strip to keep dust and moisture out of sensitive equipment, again favoring UV-stable lip materials.
Across these industries the common requirement is a strip that installs in one pass, stays bonded, and survives years of compression and weather. That is exactly the problem co-extrusion solves, and it is why Faygo positions the line as a waterproof sealing processing system rather than a simple profile extruder.
Standards, Quality Control, and Weather Resistance Testing
Mimari sızdırmazlık bantları, malzeme ve performans standartlarına bağlıdır. Çin'de ana referans GB/T 12002'dir, kapı ve pencerelerde kullanılan plastik sızdırmazlık bantları için standarttır, bu standartta sertlik, dayanma, uzama, sıkıştırma seti, ısı yıpranması ve ozon direnci gibi gereklilikler belirtilir. İhracata yönelik ürünler genellikle kauçuk ve plastik hava bandı için ilgili ISO yöntemlerine ve bölgesel yapı kurallarına göre kontrol edilir, bu kurallar hava sızdırmazlığı ve hava geçirgenliğini belirler.
Quality control on a Faygo line covers three layers. First, incoming compound is verified for filler load, stabilizer type, and melt flow rate so the barrel and die see a consistent melt. Second, the line is run during the 72-hour pre-delivery test to confirm steady output, stable dimensions, and a bonded interface with no delamination. Third, sample strips are cut and sent for accelerated weather testing: heat aging to confirm hardness change stays within limit, ozone chamber for crack resistance, and a UV cycle for color and surface change.
Kompresyon seti, tek en önemli alan metriğidir. Düşük kompresyon setine sahip bir kenar, yıllarca sıkıştırıldığında şeklini geri alır, bu nedenle kapı veya pencerenin sızdırmazlığı korunur. TPV ve EPDM benzeri TPE burada önde gelir; plastikleştirilmiş yumuşak PVC, sadece sızdırmazlığın hafif olarak yüklendiği ve korunulduğu yerlerde kabul edilebilir. Faygo, her satır için kenar malzemesi ve test sonucunu belgeleyerek, alıcı GB/T 12002 veya eşdeğer ISO yöntemine uygunluğunu gösterebilir.
Boyut kontrolü ikinci katmandır. Bar veya kabarcık, bandı profilden kılavuz çukuruna takması için tolerans içinde olmalıdır, aksi takdirde band düşer veya yerleşmez. Vakum kalibrasyon yuvası ve kalibre edilmiş çekme, bu özelliği dar bir aralıkta tutar ve Faygo, gönderimden önce müşteri çizelgesine göre asıl boyutları kaydeder.
Installation, Commissioning, and Service Support
Buying the line is only half the project. Faygo, a Wanplas factory, supplies the full path from layout to stable production. The support covers:
Fabrika danışmanlığı. Water and electricity design, factory site layout with 3D workshop design, worker configuration and training, and new factory construction as a turnkey project. For plants with older equipment, Faygo offers old machine replacement with a plan that targets zero downtime, and capacity expansion that removes bottlenecks to roughly double output.
Turnkey teslimat. Customized line design from the strip cross-section, rigorous quality control with the 72-hour test, and end-to-end service covering selection, design, manufacturing, installation, commissioning, training, and maintenance.
Yedek parça ve garantiWanplas grubu politikası, her yıl 500 ABD doları değerinde ücretsiz yedek parça ve hasarlı parçaların garantili değiştirilmesini içerir. Bu, küçük ve orta ölçekli tesislerde tek bir hattın çalışmasını sağlar ve büyük bir tutulan stok olmadan.
Remote operation and support. The PLC and HMI record process recipes and operating data, and Faygo offers 24/7 online technical support plus remote monitoring so engineers can read PLC data and respond to abnormal conditions without a long travel delay. Recipe storage on removable media lets a new strip be produced by loading a saved parameter set.
Open factory.Wanplas, satın alma öncesinde müşterilerin Zhangjiagang merkezine ziyaret etmesini teşvik eder. FAYGOPLAST atölyesini, kalibrasyon masalarını ve çalışan bir hattı görmeden önce satın alma riskini azaltır.
Commissioning follows a fixed sequence: install and level the extruders and downstream, connect utilities, dry and load the compounds, run the die with a trained operator, tune temperatures and speeds to the recipe, verify dimensions on the calibration table, then run the 72-hour test and cut sample strips for the weather test. Training covers daily operation, die cleaning, haul-off belt care, cutter setup, and the recipe system so the customer team can change strip types without outside help.
Common Defects, Causes, and Preventive Maintenance
Even a well-built co-extrusion line shows characteristic defects when a parameter drifts. Knowing the cause lets the operator correct the strip before scrap accumulates. The defects below are the ones most often seen on sealing strip lines, together with the maintenance habits that keep them away.
Delamination at the hard-soft interface. The most serious defect is a lip that peels off the base. It is caused by a viscosity mismatch between the two melts, by too low a die temperature that prevents bonding, or by contamination at the interface. The fix is to balance the single-screw and twin-screw outputs so the two melts meet at matched viscosity, raise the die land temperature slightly, and keep both hoppers and barrels clean. A small amount of tie-layer or a compatible TPE grade also helps adhesion.
Out-of-round bulb or distorted lip.Bar, yatay olarak düzleşir veya fin, yumuşak dudakta eşit olmayan soğutma veya çekme kuvvetinin çok yüksek olması nedeniyle bükülür. Kalibrasyon masası, tabanı önce soğutmalı ve dudakları sona erdirmelidir, ve caterpillar basıncı, yumuşak dudak için yeterince yüksek olmalıdır. Simetrik püskürtme nozulları ve daha uzun bir kalibrasyon masası, daha geniş bantlarda yaygın düzeltmelerdir.
Surface streaking or die lines. Lines along the strip usually mean a dirty die, a dead spot where PVC decomposes, or a filler agglomerate. The remedy is regular die cleaning with the correct tool, a balanced screw that avoids stagnant zones, and compound screening before feeding. Faygo’s twin-screw design emphasizes self-cleaning kneading blocks so decomposed material does not build up in the barrel.
Dimension drift on the locking barb. If the strip no longer inserts or falls out, the calibration sleeve has worn or the haul-off speed has drifted against extruder output. Recurring dimension checks against the customer drawing, sleeve inspection, and closed-loop speed synchronization between extruder and haul-off prevent this. The PLC recipe stores the proven speed so the set point is not guessed after a changeover.
Yellowing or chalking outdoors. This is a material and stabilizer issue rather than a machine fault. It appears when the lip lacks a UV package or the base lacks enough titanium dioxide. Choosing TPV or TPE-S with a rated UV stabilizer and a base with the right pigment load removes the problem at the recipe stage, which is why the material selection in an earlier section matters as much as the hardware.
Preventive maintenance plan. A simple weekly and monthly routine keeps the line at high overall equipment effectiveness. Weekly: clean the die and hopper throat, check haul-off belt tension and wear, verify cutter blade sharpness, and review the recipe against the running parameters. Monthly: inspect the calibration sleeve for scoring, check barrel and gearbox temperatures against baseline, lubricate the haul-off guides, and back up the recipe files. Quarterly: review screw and barrel wear with a process check, calibrate the loss-in-weight feeder, and confirm the vacuum calibration level. Because Wanplas supplies USD 500 free spare parts each year and warranty replacement, worn belts, blades, and seals are replaced without a large held inventory. The 24/7 remote support lets Faygo engineers read the PLC data and suggest correction before a small drift becomes a batch of scrap.
Bu bakım disiplini, 72 saatlik fabrika testi ile yıllar süren istikrarlı üretimi arasında fark yaratır. Bu disiplini uygulayan alıcılar, genellikle yüksek kapasite kullanımını korur ve iki en pahalı arıza türünden kaçınır: arayüz delaminasyonu ve boyut dalgalanması. Her ikisi de, erken düzeltme ile geri kazanılabilir ancak bir tam bobin yanlış yapıldığında çok pahalıdır.
Sıkça Sorulan Sorular
What is the difference between a sealing strip co-extrusion line and a normal PVC profile line?
Normal bir PVC profili hattında, tek bir malzemeli bir profil oluşturmak için bir çift silindirli ekstruder kullanılır. Sealing strip ko-ekstrüzyon hattında ise ikinci tek silindirli ekstruder ve bir ko-ekstrüzyon die eklenir, böylece yumuşak bir kenar tek geçişte sert PVC tabanına yapıştırılır. Kalibrasyon tablosu, çekme ve kesici benzerdir, ancak die ve ikinci ekstruder, yumuşak sızdırmazlığı sağlar.
Can I run both PVC and TPE on the same line?
Evet. Çift silindirli ekstruder, sert PVC taşıyıcıyı plastikleştirirken tek silindirli ekstruder, TPE veya yumuşak PVC dudakları plastikleştirir. Her malzeme, ko-ekstrüzyon die'de birleşir, bu nedenle her malzeme kendi barındırdığı sıcaklıkta kalır. Tarif sistemi her malzeme çifti için bir parametre seti saklar.
Which lip material should I choose for exterior doors?
Dış ve zorlu iklim kullanımı için, bir UV stabilizatör paketi içeren bir TPV veya TPE-S lip seçin. Plastikleştirilmiş yumuşak PVC, iç veya korunaklı contalar için en düşük maliyetli seçenektir, ancak dışarıda daha hızlı sertleşir. Lip malzemesi, temelden daha fazla hava koşulu ömrüne karar verir.
How wide a strip can the line produce?
Faygo platformu, yaklaşık 6 mm'den 50 mm'ye kadar strip genişliklerini kapsar ve die tasarımıyla desteklenen özel sekil parçaları sunar. Daha geniş veya çok boşluklu striplerde, daha büyük bir vidayı ve daha uzun bir kalibrasyon masası kullanılır. Doğru sınır, Faygo'nun sekil çizimi ve hedef metrekare başına dakika değerlerini inceleyerek belirlenir.
What output can I expect in meters per minute?
Hat hızları, kompakt bir hatta 1 m/dakika ile 10 m/dakika arasında değişir ve toplam malzeme çıkışı 40 kg/saat ile 200 kg/saat arasında değişir. Gerçek sınır, soğutma kapasitesi ve yumuşak dudakların erime kuvvetidir, eksütör boyutu değildir. Çok boşluklu kalıplar, hat hızını artırmadan üretimi artırır.
Does the line meet Chinese and international standards?
Faygo hatları CE ve ISO sertifikalıdır ve Çin mimari sızdırmazlık bantları için GB / T 12002 ve ihraç için ilgili ISO hava sızdırmazlık yöntemleri için örnek bantlar doğrulanabilir. Faygo, her teslimatta sertlik, kompresyon seti, ısı yaşlanması ve ozon sonuçlarını belirtir.
Eğer PVC profil extruderum zaten var ise ne olur?
Mevcut kalibrasyon tablonuz ve haul-off'a tek bir çiftli ekstrüder, bir ko-ekstrüzyon adaptörü ve yeni bir die ekleyerek, en düşük maliyetli yoldur. Faygo, mevcut yapınızı inceleyip, ekleme yerine tamamen yeni bir hat önerir.
Komisyonlama süresi ne kadar sürer ve hangi eğitimler içerir?
Komisyonlama süresi, bant karmaşıklığı ve işletme hazırlığına bağlıdır, ancak 72 saatlik ön-teslim testi, hatın gönderilmeden önce geçerliliğini kanıtlar. Yerinde komisyonlama, kurulum, formül ayarını, boyut doğrulaması ve günlük çalışma, die bakımı, haul-off bakımı ve formül değiştirme işlemleri için operatör eğitimini kapsar.
Talk to Faygo About Your Sealing Strip Line
If you are specifying a PVC door and window sealing strip co-extrusion line for architectural profile waterproof sealing, Faygo, a Wanplas factory, can design the line from your strip cross-section and target output, build it on the CE and ISO certified FAYGOPLAST platform, and prove it with a 72-hour test before delivery. Share your cross-section drawing and required meters per minute, and the team will return a configuration with the right twin-screw and single-screw set, die cavity count, calibration length, and a documented process recipe. You are also welcome to visit the Zhangjiagang workshop to see a running line and discuss factory layout, training, and capacity expansion with the engineering team.
