Choosing Automobile Headliner Wet Method Line (Pu Glue Rolling Process): Application Fit and Specification Checks

What Is the Automobile Headliner Wet Method Line (Pu Glue Rolling Process)?

The Automobile Headliner Wet Method Line (Pu Glue Rolling Process) is a dedicated production line for manufacturing automobile interior headliners from PU foam sheet substrates. It applies adhesive to the PU foam sheet through a rolling and spraying method, then laminates the sheet with PU upper and lower non-woven fabrics and glass fiber felt—five material layers in total—before pressing the stack in a forming press to produce a finished headliner panel.

Chongqing Guang Jingxin Technology Co., Ltd. designs and manufactures this line as part of its automotive interior parts production line portfolio.

How the Line Works

Understanding the working principle clarifies whether this line matches a plant's existing workflow and material supply chain.

Five-Layer Material Stack

The line processes five discrete material layers:

1. PU lower-layer non-woven fabric (bottom face)
2. Glass fiber felt (lower structural layer)
3. PU foam sheet (core substrate — receives rolling glue and spraying)
4. Glass fiber felt (upper structural layer)
5. PU upper-layer non-woven fabric (top face)

The PU foam sheet is the only layer that receives the PU glue rolling and spraying treatment. Both the lower and upper non-woven fabric and glass fiber felt layers are overlaid without individual glue application at the roller station.

Process Flow

The production sequence runs as follows:

1. PU feeding — The PU foam sheet is loaded by a PU feeding machine.
2. Glue rolling — The PU glue rolling machine applies adhesive to the PU foam sheet surface.
3. Pre-spray conveying — The adhesive-coated sheet is transported to the spray station.
4. Spraying — A spraying machine applies additional adhesive coverage.
5. Post-spray conveying — Material advances along the post-spray conveyor.
6. Coil material feeding and cutting — Non-woven fabric and glass fiber felt are fed from coil rolls and cut to length.
7. Transfer and stacking — A transfer machine superimposes all five layers.
8. Forming press — A feeding mechanism loads the five-layer stack into the forming machine; the press applies pressure and holds for a dwell period.
9. Part retrieval — A reclaiming gripper removes the finished headliner and delivers it to the manual retrieval post or the subsequent process.

Key Modules and Equipment

The line is composed of the following principal units:

Optional add-on modules available for this line include a reinforced glass fiber placement mechanism, a sheet fabric placement mechanism, and an ultrasonic warning label system.

Stated Performance and Operational Characteristics

The following characteristics are described in the confirmed product specification:

• Production cycle: As fast as 62 seconds per piece
• Operator requirement: 1–2 operators, saving 4–5 workers compared to traditional manual methods
• Material utilization: The precise cutting system minimises clamping distance, reducing material waste
• Automation scope: Fully automated from material feeding through to part removal
• Intelligent management: Compatible with an MAS management monitoring system supporting real-time production tracking, material scanning error prevention, and visual management

Selection Criteria: Is This Line the Right Fit?

Criterion 1 — Base Material Compatibility

This line is specifically engineered for PU foam sheet as the core substrate. It applies PU glue via a rolling-and-spraying combination directly to the foam sheet. If your headliner production uses a hemp fiber base material that requires infrared heating before cold-press forming, a dry automatic line designed for that substrate would be more appropriate (see the Automobile Headliner Dry Automatic Line). The wet method line reviewed here is not designed for the dry-heat processing of hemp fiber boards.

If your facility currently uses or is transitioning to PU foam sheet-based headliner construction, this line aligns with that material specification.

Criterion 2 — Glue Application Method: Rolling vs. Fiber-Side Application

Within the wet method category, there are two established process variants for automobile headliner lines:

• PU Glue Rolling Process (this line): The PU foam sheet itself receives rolling glue and spraying. Non-woven fabrics and glass fiber felt are overlaid without a separate glue rolling step on those layers.
• Fiberglass Rolling Adhesive Process: The glass fiber felt layers receive the rolling glue treatment, and the PU plate receives spraying. This variant prioritises adhesion through the glass fiber matrix.

Buyers should confirm which process variant their existing adhesive supply chain, headliner design specification, or OEM customer quality standard requires before selecting between the two wet method lines.

Criterion 3 — Required Automation Level

The Automobile Headliner Wet Method Line (Pu Glue Rolling Process) is a fully automated line from feeding through part discharge. This suits facilities planning medium-to-high volume production runs that justify the investment in a complete automated line. If a facility only needs to apply adhesive to fabric panels (rather than managing the entire multi-layer headliner build), a standalone Automotive Fabric Rolling Glue Line or a Glue Rolling Machine may be a proportionate choice.

Criterion 4 — Plant Scale and Operator Capacity

The line's stated operator requirement of 1–2 persons signals it is designed to replace higher-headcount manual operations. Procurement teams should verify that their production floor can accommodate the physical footprint of the full line—spanning the feeding, conveying, spraying, cutting, transfer, forming, and retrieval stations—and that the facility supports the MAS system integration if intelligent monitoring is required.

Criterion 5 — Optional Module Requirements

If the headliner design specification calls for additional reinforcement layers or integrated quality-labelling at the line level, buyers should confirm at the inquiry stage whether the reinforced glass fiber placement mechanism, the sheet fabric placement mechanism, or the ultrasonic warning label system are needed, as these are listed as optional add-ons rather than standard inclusions.

How This Line Compares to Related Equipment

This table is compiled from confirmed product descriptions and is intended to help buyers identify the right scope of equipment for their process.

Specification Checks Before Purchasing

Before submitting an inquiry for the Automobile Headliner Wet Method Line (Pu Glue Rolling Process), buyers are advised to confirm the following against their own requirements:

1. Substrate specification: Confirm your headliner design uses a PU foam sheet core (not hemp fiber or alternative base materials).
2. Layer construction: Verify the target five-layer stack—lower non-woven fabric, lower glass fiber felt, PU foam sheet, upper glass fiber felt, upper non-woven fabric—matches your product drawing.
3. Production volume: Ensure the target annual or monthly volume is compatible with a 62-second-per-piece cycle time operating at typical shift patterns.
4. Floor space: Request a layout drawing from Chongqing Guang Jingxin Technology Co., Ltd. to confirm line footprint against available plant space.
5. Adhesive type: Confirm that PU glue (for rolling and spraying) is approved in your material specification and available through your supply chain.
6. Optional modules: Identify whether reinforced glass fiber placement, sheet fabric placement, or ultrasonic warning labelling are required for your product variant.
7. MAS integration: Determine whether the production monitoring system needs to interface with existing plant-level ERP or quality management systems.

Summary

The Automobile Headliner Wet Method Line (Pu Glue Rolling Process) is suited to automotive interior manufacturers that build headliner panels from PU foam sheet substrates using a rolling-glue-and-spray adhesive process with a five-layer laminate construction. Its fully automated design, 1–2 operator staffing requirement, and optional intelligent management modules make it relevant for mid-to-high volume production environments. Buyers whose process specifies hemp fiber substrates, fabric-only bonding, or a fiberglass-first adhesive sequence should review the alternative lines outlined above before proceeding.

For application-specific technical details, footprint drawings, pricing, and delivery terms, contact Chongqing Guang Jingxin Technology Co., Ltd. directly.