Our Manufacturing Philosophy

Yongbang's machinery is known for its durability, which can achieve stable operation for more than 10 years.
We focus on the long-lasting design and performance optimization of the mechanical structure, and each piece of equipment has been strictly verified for durability, so that it can meet the long-term production needs without frequent replacement, and we interpret the quality promise of durable machinery with actual performance.

Our Inspection Process

Our inspection process covers the entire production chain from raw materials to finished products, ensuring the reliable quality of each and every piece of equipment.

Raw Material Entry Inspection

We analyze the composition spectrum of steel and other key raw materials to ensure that the materials meet the requirements and prevent unqualified raw materials from flowing into the production process.

For the production of auxiliary materials, through the melt index test, mechanical properties test and other methods, to verify whether their high temperature resistance and anti-aging properties meet the needs of equipment operation.

Production process monitoring

For key parts such as screws and mold heads processed by CNC lathes, carry out tolerance measurement (controlled within ±0.02mm)

Carry out no-load running test on electrical parts such as motor and heating coil to ensure normal functioning.

Factory test of the whole machine

The equipment should be run continuously for 72 hours to monitor the stability of screw speed, die pressure and other parameters.

Test the uniformity of film thickness (error ≤ 3.5%), capacity to meet the standard rate. Test whether the core performance such as sealing strength and bag-making speed meets the technical requirements.

CNC machining precision

All parts are processed by CNC lathe with tolerance control ±0.02mm, which is 80% higher than the traditional manual processing precision.

Die head runner is manufactured by 5-axis linkage machining center to ensure uniform melt extrusion, film thickness error ≤ 3.5%.

Core component material

The screw / die is made of special alloy steel, the surface hardness reaches HV≥900 after nitriding treatment, the abrasion resistance is increased by 200% compared with the ordinary steel, and it can support more than 10 years of continuous operation.

Roller / wind ring surface chrome plating treatment, roughness Ra ≤ 0.8μm, reduce film friction coefficient by 15%, finished product transparency increased to 92%.

Electrical selection and Parts Customization

Support multi-brand modularization option, compatible with Siemens / Mitsubishi / ABB and a series of electrical systems, adaptation accuracy of ± 0.1V.

Core parts can be customized, including spindle, guide rail, screw and a series of components, size tolerance control ± 0.05mm, strength increased by 40%.

What is YONBANG's quality control process?

5-stage QC: raw material inspection → component testing → assembly verification → 72-hour run test → final calibration.

How precise is component manufacturing?

CNC machining with ±0.02mm tolerance, 100% inspected via coordinate measuring machines (CMM).

What is the 72-hour run test protocol?

Continuous production at 80% load with real-time monitoring of temperature, vibration, and output stability.

How are critical components like screws tested?

100,000-cycle fatigue test, hardness testing (HRC 58-62), and wear resistance verification.

What quality certifications does YONBANG hold?

ISO 9001, CE, SGS, and FDA compliance for food contact materials in machinery components.

Is there full material traceability?

Yes, batch-level material certification with 10-year record retention, compliant with EU REACH regulations.

How does YONBANG use data for quality improvement?

AI-driven quality analytics from 40+ countries of field data to identify and prevent potential issues.

What is the customer complaint resolution rate?

98% resolution within 72 hours, with root cause analysis and preventive actions documented.

How does YONBANG QC compare to industry standards?

30% stricter tolerance controls, 2x longer endurance testing, and 100% inspection vs industry sampling methods.

How to audit YONBANG quality system?

Pre-audit documentation package and on-site quality system audits by customer's third-party inspectors.

Are your machines suitable for producing export-quality products?

Yes. Our equipment helps customers meet international packaging and product standards, including FDA-compliant food-grade films and biodegradable material requirements.

Can you provide customized solutions while maintaining quality?

Absolutely. Customized machines follow the same strict quality control procedures as standard models, including design review, prototype testing, and final validation according to client requirements.

Are your film blowing lines energy-efficient?

Absolutely. Energy efficiency is a core design principle. Our machines feature high-efficiency AC motors, optimized screw designs for lower torque, and advanced IBC (Internal Bubble Cooling) systems that significantly reduce cooling time and overall energy consumption, providing you with a lower cost of operation.

True partnership begins at delivery: we provide professional installation, 24/7 support, annual warranty and proactive maintenance to ensure your production line's uninterrupted performance.