Adhesive Bonded Sandwich Panel Manufacturing
Adhesive bonded sandwich panels consist of thin, strong outer layers and a lightweight middle core, all held together by a high-performance adhesive. The main role of the face layers is to provide structural strength and durability, while the core provides lightweighting and insulation, such as heat and sound insulation. Through different material selection and structural design, sandwich panels can be flexibly customized and optimized according to specific application needs.
Facing & Core
| Facing | Core |
|---|---|
| FRP(Fiberglas reinforced plastic) CFRT (Continuous fiber reinforced thermoplastic) Carbon Fiber Aluminum PPGI(Pre-painted galvanized steel) PPGL(Pre-painted galvalume steel) Stainless steel HPL（High-pressure Laminate） Hard PVC/PET Plastic PVC Leather | XPS (Extruded Polystyrenee) foam. PET (Polyethylene terephthalate) foam. PU (Polyurethane) foam. PVC (Polyvinyl Chloride) foam. PP (Polypropylene ) Honeycomb. Plywood. |
Manufacturing Process for Bonded Sandwich Panels
TOPOLOGROUP factory is equipped with the most advanced production line of adhesive bonded sandwich panels in China, producing all kinds of foam, honeycomb and plywood sandwich panels. These production lines adopt the latest vacuum compression technology, and the sandwich panels are stable, strong and durable.
Design Sandwich Panels
Designers carefully balance material properties, structural considerations and environmental requirements to select the appropriate material, thickness, adhesive and core structure.
Preparation
- Core material preparation: The core material is first cut and shaped to the required thickness and size.
- Selecting the facesheets: The appropriate facesheet material is selected and tested.
Automatic Cutting Roll System
The roll is automatically cut into sheets of set size. FRP sheets, carbon fiber sheets, aluminum sheets, pre-coated steel sheets, vinyl sheets and other types of polymer sheets can be cut.
Automatic Positioning System
In order to obtain the most accurate sandwich panels, we use 3D laser positioning technology. During the laying of sandwich panels, each part is accurately positioned and 100% in line with the design drawings.
Automatic Glue Spraying System
Uneven glue distribution can cause a series of problems such as blistering and delamination. The automatic glue spraying system can pre-set the glue spraying dosage and density to spray the glue evenly on the skin and core material.
Vacuum Press System
The bonded sandwich panel cannot be used directly. At this time, the bonding between the core and the skin is not strong. The sandwich panel is sent into a high-pressure press, where it is compressed under high pressure in a completely vacuum closed bag to completely release the internal air and fix the shape, thereby making the structure of the sandwich panel more stable.
Post-Processing
After the glue cures, we inspect the sandwich facesheets for any defects and remove any excess adhesive. The sandwich panels are machined to the required size and shape on a high-precision CNC platform.
Quality Inspection
The final sandwich facesheets are tested to ensure that they meet the required mechanical properties. Common test methods include:
- Peel Test: Measures the bond strength between the facesheet and the core.
- Shear Test: Evaluates the ability of the adhesive to withstand shear stress.
- Compression Test: Evaluates the strength of the facesheet under compressive loads.
Packaging and Shipping
All sandwich panels are packed according to air transport grade, which are waterproof, fireproof, collision-proof and scatter-proof. This high standard packaging method can ensure that they are not damaged during long-distance transportation.