Laiyi Extrusion Laminating Line – Overview of the Laminating Machine Structure

Overview of Laminator Structure

The lamination unit primarily consists of a cooling roller, silicone rubber pressure roller, supporting roller, peel-off roller, edge trimming device, drive system, and pneumatic system. It is used to laminate the extruded molten film onto a substrate, serving as the core component of the extrusion lamination or extrusion coating process. Its main functions include lamination, cooling, and shaping.

The Laminator line is equipped with a steel cooling roller that has a hard chrome-plated surface and a double-layered spiral groove jacket. Cooling water circulates through the groove layer to quickly dissipate the heat of the molten film, ensuring effective cooling and shaping of the composite film. This significantly enhances the lamination strength, flatness, and appearance of the finished product. (See Figure 1)

1. Frame

The frame is constructed from thick steel plates supported by steel tubes, with all support holes machined simultaneously. This design avoids machining and assembly errors. Lifting holes are also provided for convenient transportation, as shown in the figure:

2. Lamination Rollers

The lamination rollers consist of three components: a driven cooling roller (cooling roller), a rubber pressing roller (rubber roller), and an auxiliary rubber roller. All rollers use water-cooling.The cooling roller features a double-helix groove structure to ensure uniform surface temperature.The rubber and auxiliary rollers adopt a single-pipe design.The pressure of the rubber roller can be adjusted independently on the left and right sides.

To facilitate replacement, all rollers use a quick-change design. When replacing, only the drive belt and pipe connectors need to be removed.

3. Edge Trimming Device

The standard configuration includes a semi-automatic cutter, with an optional fully automatic cutter. The fully automatic cutter is driven by a motor through a transmission mechanism to rotate the cutter shaft actively. Pneumatic blades are used to pneumatically adjust the cutting depth.

4. Peel-off Roller

The peel-off roller promotes separation of the film from the cooling roller. Its surface can be made of rubber or steel, and it can operate in either pressing or release mode.

5. PTFE Tape Device

This device prevents molten resin, which may overflow to both sides of the substrate during lamination, from sticking to the rubber roller and affecting the lamination quality.

(Transmission Diagram (Figure 1))

Working Principle:

The motor drives the cooling roller, which actively guides the substrate. Through mechanical transmission, power is also supplied to the cutter and traction roller, creating a speed differential between the substrate and the cutter for smoother cutting. According to different substrates and process requirements, arc rollers can be configured to improve substrate flatness as it enters the cooling roller.

During the lamination process, chilled water is injected into the cooling roller and rubber roller via rotary joints to rapidly cool the laminated material, ensuring strong bonding between the cast film and the substrate.

Cooling Roller Specification Series:

Note: Some dimensions in the above series can be customized based on customer requirements.