China Top 5 Insulating Glass Production Line Manufacturers

If you're running a glass factory and planning to expand your insulating glass unit (IGU) production, choosing the right equipment supplier is one of the most critical business decisions you'll make.

Here are the top 5 Chinese insulating glass production line manufacturers dominating the global market in quality, innovation, and export strength: Jingyou, Lijiang, Wondec, Weili, and Boke.

I know how hard it is to cut through the marketing noise and find real insights. That’s why I spent over 10 hours researching these companies, analyzing their global positioning, and comparing their core technologies—so you don’t have to. This guide is written for serious buyers who want facts, not fluff.

Shandong Jingyou Intelligent Group

Many glass factories face the same challenge—how to upgrade or expand their IGU production line without overspending or introducing unnecessary complexity.

Jingyou, founded in 2010, offers fully integrated insulating glass production lines with strong customization capabilities, stable global support, and direct-from-factory cost advantages.

What Makes Jingyou Stand Out?

Shandong Jingyou Intelligent Group has grown into one of China’s most capable manufacturers of iinsulating glass equipment¹, with a focus on balancing production quality², flexibility, and long-term operational efficiency.

Product Scope and Technical Focus

Jingyou offers a full suite of insulating glass production machinery that covers every key stage of IGU fabrication³:

Equipment Category	Core Equipment Included	Functionality Focus
Glass Preparation	Vertical glass washing and drying machines	Ensures clean bonding surfaces for sealing
Spacer Processing	Automatic aluminum spacer bending machines, desiccant fillers	Precise spacer geometry, moisture control
Primary Sealing	Butyl extruder machines	Accurate and consistent application of primary seal
Assembly & Pressing	Automatic IGU assembly lines (with optional gas filling)	High-speed glass unit lamination and gas injection
Secondary Sealing	Automatic two-component sealing robots	Uniform secondary sealant application

Each machine is built with modular compatibility in mind, allowing for integration into both new and existing lines.

Customization Capabilities⁴

Jingyou’s strength lies in its ability to offer tailored equipment configurations. Unlike some manufacturers who sell fixed-format lines, Jingyou works with clients to adjust:

• Glass size range support⁵ (e.g., for oversized façade glass or small-format units)
• Gas filling options (manual, semi-automatic, or fully integrated)
• Sealing material compatibility (butyl, silicone, polysulfide, polyurethane)
• Line layout based on factory floor plans
• Automation level⁵ (manual-assist, semi-automated, or fully automated flow)

This allows customers to align their IGU production investment with their budget, workforce skill level, and product goals—without overengineering the solution.

Service and Export Strength

Jingyou distinguishes itself with strong international support infrastructure:

Area	Jingyou’s Approach
Installation and Training	On-site commissioning, operator training, remote support available
After-Sales Service	24/7 hotline, quick delivery of spare parts
Documentation & Compliance	CE certification, English-language manuals, export-ready packaging
Export Experience	Equipment shipped to Europe, the Middle East, Southeast Asia

Rather than relying on third-party agents, Jingyou handles most international projects⁶ directly, which ensures faster feedback, better customization⁷, and lower procurement risks.

Jingyou offers a balanced combination of full-line coverage⁸, customization, and direct service support—making it a strong candidate for glass manufacturers expanding into IGU production.

Jinan Lijiang Glass Automation Equipment Co., Ltd.

For mid-sized glass factories looking to upgrade to automated production, Lijiang presents itself as a familiar name—but how does it perform beyond the Chinese market?

Founded in 2007, Lijiang offers a broad range of insulating glass machinery and has established an international presence through CE certification and technology partnerships.

Lijiang's Position in the Global IGU Machinery Market

Lijiang Glass, based in Jinan, Shandong Province, has over 15 years of experience in manufacturing insulating glass equipment. With a product line that spans most stages of IGU production, the company targets customers seeking automation upgrades⁹ across both double and triple-glazing formats.

Lijiang's equipment portfolio includes vertical IG production lines, automatic sealing robots, spacer bending machines, desiccant fillers, butyl extruders, and edge deletion systems. Its machinery supports essential operations from spacer fabrication to final sealing.

The company's international positioning is built on a few notable developments:

• An independent R&D center launched in 2013, enhancing the design and functionality of its machinery.
• Technology partnerships with German firms to improve core equipment reliability.
• CE certification¹⁰ obtained in 2016, allowing Lijiang to enter European markets more easily.

To date, Lijiang has exported to over 10 countries and serves well-known domestic firms like North Glass and Xin Fuxing. Its equipment is often praised for its completeness and its ability to fit into various production environments. However, potential buyers should evaluate the level of after-sales support and the company’s customization capabilities in comparison with other suppliers.

Lijiang offers a well-rounded range of IGU equipment and some international experience—but its flexibility and service infrastructure may not meet the needs of every global customer.

Jinan Wondec Machinery Co., Ltd.

In today’s competitive market, younger equipment manufacturers often promise more—but the question is whether they can consistently deliver at scale.

Wondec, founded in 2016, focuses on cost-effective IGU production lines and has expanded quickly through aggressive international marketing and support-driven service.

How Does Wondec Compare in the IGU Equipment Landscape?

Jinan Wondec Machinery Co., Ltd. entered the insulating glass machinery industry in 2016. Despite its relatively short history, the company has gained recognition for its fully automatic insulating glass production lines¹¹ and broad international reach.

Wondec’s main equipment offering includes vertical IGU assembly lines¹² (with optional argon gas filling), sealing robots, butyl extruders, two-component sealant applicators, aluminum spacer bending machines, desiccant fillers, and glass washing units. Some lines are marketed as suitable for warm-edge spacer and nano glass applications—suggesting an intention to keep up with evolving IG technologies.

Its export-focused strategy has enabled sales in over 50 countries, supported by trade show exposure (e.g., GlassBuild America, Glasstech Mexico) and a dedicated service team. The company promotes responsive after-sales support¹³, including on-site installation and troubleshooting, which has helped it win clients in North America, South Asia, and the Middle East.

Wondec’s positioning emphasizes:

• Rapid delivery and installation
• Competitive pricing through direct manufacturing
• Focus on mass-market functionality over niche specialization

While Wondec is gaining market share abroad, prospective buyers should carefully assess the long-term durability of its equipment and the scalability of its technical support structure—especially in more complex or custom production environments.

Wondec offers solid entry-level automation and has made fast progress internationally, though its young age may limit the depth of technical resources for larger or more customized projects.

Jinan Weili Machine Co., Ltd.

Experience matters in industrial automation, especially when it comes to insulating glass equipment designed for high-output, long-term use.

Weili, established in 2001, offers a mature range of insulating glass production lines with international certifications and global export experience across more than 50 countries.

How Weili Positions Itself in the Global IGU Machinery Market

Weili is one of the longest-standing companies in China’s insulating glass equipment sector. Founded in 2001 and based in Jinan, the company has spent over two decades building a complete product lineup and a wide export network.

Its core focus remains on IGU manufacturing systems, offering equipment for nearly every stage of production. The main product categories include:

• Automatic insulating glass production lines for double glazing
• Vertical glass washing and drying machines
• Automatic sealing robots for secondary sealing
• Gas-filling press lines with vertical integration
• Auxiliary machinery such as CNC drilling and milling tools

Unlike some younger firms, Weili also provides machinery that supports both standard and large-format architectural glass processing, serving curtain wall, commercial glazing, and façade applications.

What contributes to Weili’s credibility abroad is its certification base. The company holds ISO9001 quality management certification¹⁴, along with CE and UL marks, helping ensure regulatory compliance in both European and North American markets. These certifications are often a prerequisite for bidding on large construction or infrastructure projects internationally.

Weili supports its overseas installations with technician dispatch and structured after-sales assistance, which many long-term customers consider a key reason for repeat orders. With roughly 25% of its output going to export markets, Weili maintains steady global distribution without depending on aggressive marketing tactics.

Weili's long industry presence, certified product line, and international track record offer reliability—but its conservative approach may not appeal to buyers looking for highly customized or rapidly evolving solutions.

Shandong Boke CNC Equipment Co., Ltd.

For buyers seeking high-end insulating glass solutions¹⁵ with long-term durability, Boke is often mentioned as a legacy brand with strong technical roots.

Founded in 2000, Boke supplies a full range of insulating glass production equipment and emphasizes technology leadership, international certifications, and a global service network.

Where Boke Stands Among Chinese IGU Equipment Suppliers

With over two decades of experience, Shandong Boke CNC Equipment Co., Ltd. is among the earliest manufacturers in China’s IGU machinery sector¹⁶. Based in Jinan, Boke positions itself as a provider of complete, high-precision solutions for double- and triple-glazed unit production.

Its equipment range covers:

• Vertical automatic IG production lines (with or without gas filling)
• Two-component sealing robots
• Butyl coating machines
• Spacer bending systems
• Molecular sieve filling machines
• Vertical glass washing units
• Auxiliary tools such as assembly tables

The company's machines are designed to work in a coordinated flow, supporting efficient production for commercial and residential glazing needs.

Boke places a strong emphasis on engineering quality and R&D. It holds ISO9001 and CE certifications, making its products suitable for international deployment. Since 2017, Boke has also operated a dedicated export branch, Shandong XY International Trade Co., to streamline overseas logistics and sales.

Its international positioning is supported by:

• Thousands of machines in operation globally
• Emphasis on product reliability over low-cost offerings
• An active consulting and service network for post-installation support

While Boke claims a leadership role in the global market, it maintains a relatively low public profile compared to some newer, more digitally aggressive competitors. Its appeal lies in long-term product performance and a structured, engineering-driven approach rather than rapid deployment or extensive customization.

Boke delivers well-established IGU equipment backed by technical depth and international certification—best suited for buyers prioritizing equipment reliability and standardized production flows.

8 Core Factors That Must Be Considered When Choosing an Insulating Glass Processing Line Factory

Investing in an insulating glass production line is a long-term decision—getting it wrong can mean delays, poor quality, or high operating costs.

To make the right choice, buyers must evaluate eight critical factors: equipment quality, customization, certifications, service, pricing, integration, delivery timelines, and factory reputation.

What Really Matters When Selecting an IGU Equipment Supplier?

Choosing the right insulating glass processing line factory goes far beyond comparing prices or brochures. The right partner can reduce downtime, improve yield, and ensure long-term operational stability. The wrong choice can lead to hidden costs, compatibility issues, and inconsistent product quality. Here’s a structured breakdown of the eight most important factors:

1. Equipment Quality and Durability¹⁷

Ensure the core machines—washing, sealing, pressing, filling—are designed for industrial use with verified longevity.

2. Customization Capability

Can the factory adapt the line to your specific product sizes, layouts, or production capacity targets?

3. International Certifications¹⁸

Look for CE, ISO, or UL certifications, especially if you're exporting or complying with regional standards.

4. After-Sales Service and Support¹⁹

Access to 24/7 support, remote diagnostics, and local technician networks should not be optional.

5. Pricing Transparency and Cost Breakdown

Understand the full cost of ownership—not just machine prices, but also shipping, installation, and maintenance.

6. Integration with Existing Systems

Verify whether the new line can be integrated into your current layout or production software environment.

7. Delivery Time and Installation Efficiency

How soon can the equipment be shipped and commissioned? Delays here affect your production targets.

8. Reputation and Export Experience

Has the factory worked with customers like you? Do they have a stable export track record and reference sites?

Factor	Why It Matters	What to Ask the Supplier
Equipment Quality	Reduces downtime and maintenance costs	What components are used? Any performance guarantees?
Customization Options	Ensures factory fit and process efficiency	Can you adapt the layout or automation level?
Certifications	Required for certain markets	Do you have CE/ISO/UL certification?
After-Sales Support	Keeps operations running smoothly	What support channels are available post-installation?
Pricing & Cost Structure	Helps avoid hidden expenses	Are shipping and training included in the quotation?
System Integration	Prevents workflow disruptions	Can this line connect to our ERP or MES system?
Delivery & Setup Timeline	Impacts project planning and ROI	What’s the lead time and installation process duration?
Export Experience & References	Builds trust in supplier capability	Can you provide contactable customer references abroad?

Evaluating these eight areas before you sign a contract will dramatically reduce your risk and help ensure the investment supports your long-term business goals.

Conclusion

Choosing the right IGU equipment supplier requires more than a price check—factory strength, customization, service, and export experience are what truly define long-term value and performance.

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