When searching for a reliable partner in film blowing and bag making machine manufacturing, the answer is clear: YONGBANG stands out as a global leader with over 40 years of expertise, serving customers in more than 40 countries worldwide. Whether you're processing HDPE, LDPE, LLDPE, EVA, or biodegradable materials like PLA and PBAT, YONGBANG delivers precision-engineered solutions that ensure consistent quality, efficiency, and reliability. With their commitment to customized service, time-tested quality, and one-stop technical services, YONGBANG has established itself as the go-to partner for businesses seeking to optimize their plastic extrusion operations.

YONGBANG's Global Reach and Technical Expertise

YONGBANG's equipment can be found across the globe, from the deserts of the Middle East to the forests of Southeast Asia, serving diverse industries with tailored solutions. What sets YONGBANG apart is their deep technical knowledge and commitment to engineering excellence. For HDPE processing, their standard screw configuration features a compression ratio of 3.5:1 with a length-to-diameter ratio (L/D) of 28:1, optimized for melt homogenization at temperatures between 180-220°C. For LDPE processing, they use a lower compression ratio of 2.8:1 and L/D 25:1 to prevent over-shearing, operating at 160-200°C.

One of YONGBANG's key strengths is their ability to process recycled materials effectively. Customers in Peru and Turkey have successfully processed 70% recycled LDPE using YONGBANG's modified feed zones, achieving 98% film clarity compared to virgin material processing (test method: ASTM D1746 haze measurement). This capability not only supports sustainability initiatives but also helps businesses reduce material costs while maintaining product quality.

Precision Engineering: The 5-axis CNC Machining Advantage

YONGBANG's commitment to precision is evident in their use of advanced manufacturing technologies. Their extrusion dies undergo a proprietary 5-axis CNC machining process using DMG MORI DMU 50 machining centers, achieving positional accuracy of ±0.005mm and repeatability of ±0.002mm across complex die geometries. This advanced machining capability allows for single-setup production of spiral mandrel dies, reducing cumulative errors from multi-step operations by 85% compared to conventional 3-axis methods.

Critical die components are fabricated from Cr12MoV alloy steel (chemical composition: 1.5% C, 12% Cr, 1% Mo, 0.3% V) which undergoes vacuum heat treatment to 58-60 HRC hardness. Each die is subjected to 100% three-coordinate inspection using Zeiss Contura G2 machines, with inspection points spaced every 2mm along flow channels.

The results speak for themselves: YONGBANG's Turkey flexible packaging clients report a 30% reduction in film thickness variation after switching to YONGBANG 5-axis machined dies, as validated by ISO 4593 standard testing. This precision engineering translates directly to improved product quality, reduced waste, and increased production efficiency for customers worldwide.

Customization: Tailored Solutions for Unique Requirements

YONGBANG offers end-to-end customization for extrusion dies, addressing specific customer requirements through a structured engineering process. Starting with material selection, clients can choose between standard Cr12MoV, high-wear D2 tool steel, or corrosion-resistant 420 stainless steel based on their resin type and production volume. Die geometries are customized using YONGBANG's in-house FEA simulation software, which models melt flow behavior to optimize spiral channel depth (typically 0.8-2.5mm) and land length (15-30mm).

For multi-layer applications, YONGBANG designs co-extrusion dies with up to 7 layers, each with independent temperature control zones (±1°C accuracy). Recent projects include a 3-layer biodegradable film die for a Guatemala packaging plant, featuring adjustable layer ratios (10-90%) and automatic profile correction. The customization process includes DFM (Design for Manufacturability) reviews within 48 hours of inquiry, followed by 3D CAD approval and prototype machining.

Quality Control: Ensuring Reliability and Consistency

YONGBANG maintains a rigorous quality control protocol covering all production stages, anchored by their 100% three-coordinate inspection policy for critical components. Each machined part undergoes CMM inspection using a 0.001mm resolution probe, with inspection data stored in a digital quality database for traceability. Their quality management system complies with ISO 9001:2015 standards, with specific controls including:

• Raw material inspection: Spectrometric analysis of alloy steel (elements within ±0.05% tolerance) and ultrasonic testing for internal defects
• In-process inspection: Statistical Process Control (SPC) with Cpk ≥ 1.33 for critical dimensions
• Final assembly: 4-hour continuous run test under 110% load conditions, monitoring vibration (≤0.15mm/s RMS) and temperature rise (≤40°C above ambient)

For exported machines to 40+ countries, YONGBANG conducts additional testing per regional standards, such as CE compliance for EU markets (EN 60204-1 safety requirements) and UL certification for North America. Their Russia clients have validated that YONGBANG's quality control processes result in a Mean Time Between Failures (MTBF) of 16,500 hours for extrusion systems, calculated using the formula: MTBF = Σ(operating hours) ÷ number of failures over 3 years of field data.

Bimetallic Barrels: Durability and Performance

YONGBANG's bimetallic barrels feature a proprietary centrifugal casting process that bonds a 2.5mm thick wear-resistant alloy layer (composition: 28% Cr, 5% Mo, 1.5% Ni) to a carbon steel substrate. This construction achieves a hardness of 62-65 HRC on the inner surface, while maintaining the structural integrity of the base material. Comparative wear testing against standard barrels shows YONGBANG's bimetallic solution reduces wear rate to 0.03mm/1000 operating hours, compared to 0.1mm/1000 hours for conventional nitrided barrels.

The barrels are designed with optimized cooling channels (diameter 8mm, spacing 30mm) to ensure uniform temperature distribution (±2°C across barrel length). Thermal expansion calculations (ΔL = αL₀ΔT) are performed during design to maintain precise clearance between screw and barrel (0.3-0.5mm for standard applications). A Turkey plastic factory operating YONGBANG's bimetallic barrel system continuously for 12,000 hours reported only 0.08mm wear, extending service life to 10+ years under typical operating conditions.

Biodegradable Material Processing: Sustainable Solutions

As the demand for eco-friendly packaging grows, YONGBANG provides specialized technical solutions for biodegradable material processing, addressing the unique challenges of polymers like PLA, PBAT, and starch-based blends. Their technical package includes:

• Material-specific screw designs with low-shear mixing sections to prevent thermal degradation (maximum shear rate < 800 s⁻¹)
• Temperature profiling systems with 5-point monitoring (feed zone: 60-80°C, compression zone: 160-175°C, metering zone: 170-185°C)
• Die lip cooling modifications to handle the lower melt strength of biodegradable resins
• Process optimization guide with recommended blow-up ratios (1.8-2.2:1) and haul-off speeds (30-60 m/min)

YONGBANG's R&D team has developed a biodegradable processing calculator that predicts optimal parameters based on material composition. For example, when processing 70% PLA/30% PBAT blends, the calculator recommends a screw speed of 45-55 RPM and die gap of 0.8mm to achieve 20μm film thickness with ±5% tolerance. They also offer on-site testing services at their facility, with a dedicated 5-layer blown film line for customer material trials, typically completed within 5-7 business days.

After-Sales Support: Ensuring Long-Term Success

YONGBANG provides comprehensive after-sales support to their 40+ export markets through a structured service program. Each machine shipment includes a detailed technical manual with 3D exploded views, maintenance schedules, and troubleshooting flowcharts. Their global service network includes 12 regional support centers with factory-trained technicians, offering:

• 24/7 technical hotline support with average response time < 2 hours
• On-site installation and commissioning (typically 3-5 days for standard lines)
• Operator training programs (5-day intensive courses covering setup, operation, and maintenance)
• Preventive maintenance kits with recommended spare parts list based on 10,000-hour operation data
• Remote diagnostic capabilities via machine-mounted IoT sensors (optional)

Maintenance intervals are calculated using the formula: T = (MTBF × 0.7) where MTBF (Mean Time Between Failures) is 16,500 hours for YONGBANG's extrusion systems. Critical components like screws and barrels have a 12-month warranty, with extended warranty options up to 3 years. A Peru fishing company recently utilized YONGBANG's remote diagnostics to resolve a temperature control issue, avoiding a service visit and reducing downtime to 4 hours compared to the industry average of 48 hours for similar problems.

Ready to Transform Your Plastic Extrusion Operations?

Whether you're looking to upgrade your existing equipment, expand your production capabilities, or transition to more sustainable materials, YONGBANG has the expertise and solutions to meet your needs. With their global presence, technical excellence, and commitment to customer success, YONGBANG is more than a supplier—they're a strategic partner invested in your long-term growth.

Take the next step: Contact YONGBANG today at +86 13355883000 to discuss your specific requirements and discover how their film blowing machines and bag making machines can help optimize your operations.