ACP Fabrication or Fitting
Viva’s ACP sheets are designed and engineered for easy fabrication, fitting, and installation. Our products are highly tensile and flexible.
The information provided in this section is just for preliminary reference. We recommend you consult an expert or contact us for specific advice.
Methods for Processing
Routing And Folding (Tray Formation)
One of the main features of Aluminium Composite Panels is that they can be routed through standard routing machines to internationally designed vertical panel saws, which includes hand panel routers with various kinds of routing blades. During routing, the floor/base should be flat & free from foreign particles (we recommend using a vacuum cleaner) to avoid denting or bending of ACP sheets. In normal conditions, during routing, the routed sheet plastic thickness should not be more than the ½ of one side aluminium skin thickness.
The thickness of the remaining PE/FR core should be uniform throughout the sheet to attain smooth finish folding or bending. The blade or tip of the routing machine should be appropriate & in good condition for smooth grooving. The distance of the groove from the edge is min 25 mm. After routing cut the corner of the sheet with a sharp blade or wood chisel wider than the corner to find very smooth corner joints. Fold the sheets gently with equal pressure to avoid deflection of the panel, and hump generation & achieving a smooth panel finish. It is suggested to route the sheet from the bottom side only to avoid long term property problems on coated surfaces. Generally, the reverse bending of the routed area is not allowed.
Equipments used for Routing & Folding
For processing a small number of panels a manual router with a v-groove blade can be used. For processing a large numbers a table circular saw or CNC router is needed.
1. Manual Router with “V” groove circular blade
The manual router consists of circular grooving blades that are commonly available on the market and are used for manual processing. If they are equipped with special routing bits (carbide tipped cutter) the hand-operated router can be used for a limited number of processes. In this case, the stability of the tool and the guide system considerably affect the quality of the routing, the setting of the manual router is very important, it is highly dependent on operator skills. The router rpm should be 2400 to 5000.
2. Vertical Grooving Manual
These type of routers are consist of a moving arm with a circular blade/bit. Fix the sheet on a vertical supporting plate, and set the grooving depth by setting the wheel. The plate should be flat and free from dents to find uniform routing.
3. Automatic CNC Router (Horizontal Grooving)
This machine consists of a computer along with programming and automatic robotic arm. Set the depth & design of routing, and then select appropriate bit for routing angle.
After setting the above process, fix the sheet on the table with a clamp & execute the run command.
Cutting / Sawing of ACP
Sawing or cutting of ACP sheets is an easy process that can be done with ordinary commercial metal equipment. Saw blades and router bits are available at independent distributors who handle cutting tools. Before processing large quantities, the trial saw cuttings should be done to evaluate both the tool working conditions and the recommended cutting speeds of 3000 to 5000 rpm. For marking the panels the use of a soft pencils us adequate. High-speed band and circular saws with cutting speeds of up 30 m/min are recommended. Depending on the thickness of Aluminium Composite Panel, saw blades with a 5 to 10 mm tooth pitch should be used. For circular saws, a tooth geometry with alternating flat/trapeze teeth and carbide tips is normally recommended to ensure that edges are free of burrs. Adjust the saw blade diameter (O) and number of teeth for the material to be processed as well as the type of saw and its speed. To ensure clean cutting edges without any chips, the panel material should always be clamped to ensure that it is vibration-free.
This particularly applies for thin Aluminium Composite panel of 2 to 4 mm thicknesses. When using jigsaws, make sure the saw blades are sharp and are not straight-set (plastic, PVC). Manual feeding must be carried out slowly and evenly.
Router/Cutter Speed – 3000 to 5000 rpm
Single sheet feed speed-25 to 30 m/Minute
3-4 sheets (stacked) feed speed- 15-20 m/Minute
Viva ACP Panel of any thickness can be punched easily using sheet metal punching machines. For burr free cuts use sharp tools & dies with a minimum cutting clearance of 0.10 mm. For punching & shearing strength please refer to our grade wise technical data sheets. The distance from one hole to another hole will be 5 mm & minimum diameter of punch should be 5mm also.
During punching sheet may be deflected, so re-straitening may require. Do not remove the protective film before completion of process.
Perforated sheet (Multiple Punched)
Viva ACP is highly suitable for cutting with shear without any chipping. The gap between upper & lower shear will be 0.1mm & angle 1° to 5°.
Viva Aluminium Composite Panels can easily be bent and shaped by three roll press machine & press brake machine :
A. Three Roll System Press Machine:
This technique is very effective for bending of sheet, the rollers should be neat & clean to avoid dent & scratches on sheets.
Minimum Bending radius (r) =15*T (T stands for thickness of Panel.)
B. Press Brake Method
When bending or forming with a press brake, use a top die with the radius desired for bending and open the bottom die (jaws) approximately two times the thickness of the material plus film wider than the top die. The lower die should always have a protective pad which should not less than 2mm. Some adjustment of the lower jaws is necessary to allow for varying bending properties. The radius of the top die will be the approximate inside radius of the finished panel.
Viva ACP material can be easily drilled with twist drills commonly used for metals & plastics.
The twist drill will be high speed steel with tip angle 100° to 140°.
A hole is to cut a conical hole into a Sheet/metal object. This process is normally used to create space for the head of a screw or bolt to sit flush with the surface of the material or to clean away burrs left from drilling and tapping. Counter sinking screw is allowed only for interior use.
Viva ACPs can be fastened together or joined with other materials with rivets common to aluminium constructions. For exteriors use & high humidity areas, it is suggested to use aluminium blind rivets with SS (Stainless Steel) screw which prevents corrosion on edges.
- The shaft diameter of blind rivet should be 5 to 6 mm and head diameter is 10 to 15 mm.
- B. Please take the thermal expansion of panel into account e 2.4mm/m/100 C to avoid deflection of panel the hole in the panel should be large enough to allow the expected according to sheet length.
- C. The Rivet head should cover minimum 1.5mm surrounding area.
Commercially available, Façade grade approved stainless steel screws should be used for fastening. The screws should be tightened with screw drivers or wrench. The screw should consist of sealing the washer. The tightening of the screw should be done without exerting any pressure to the panel. If the screws are too tight it may result slight deflection on sheet and the panel have no longer possibility for thermal expansion.
Where ACP sheets are installed with the pasting method and thermal expansion is expected, we recommend using flexible & weather resistance glue only. The flexibility of glue should be approximately 300-350%. The glue thickness will generally be a minimum of 3mm and will be in a conical shape. The glue will be applied with glue guns. If spacer is required then the glue height will be 2 times of spacer height. The double-headed tape can also be of same thickness. Please also follow the instruction of the glue or tape supplier. The surface should be free from foreign particle, contamination of chemicals & water.
Viva ACP can be easily used by making a tray; the following instruction should be taken for ACP installation.
1. Panels should be fabricated into the tray with aluminium frame.
2. All joints should be protected with an approved sealant.
3. Finished tray should be delivered to the site complete with components marking for easy identification and assembly.
4 Fasteners including screws, nuts, bolts, and other items are required for joining the panel should be non-magnetic stainless steel.
5. Rivets used for fastening the frames should be of aluminium, large flange head type with stainless steel mandrel.
6. All other fixing materials should be of aluminium or stainless steel.
7. Defective panels having warped, bowed, dents n scratch and broken must not be installed.
8. Supporting brackets should be designed to provide three-dimensional adjustments and accurate location of wall components.
9. All joints should be of specified widths. No two adjacent or perpendicular joints should have a difference in width of more than 2.5 mm. Tolerance between adjacent panels across any joints should not exceed 1.5 mm locally.
Follow these tips to slay your routing and fabrication process of VIVA’s ACP sheets
- For an aluminum composite sheet to achieve the desired finishing, you must effectively execute its routing and fabrication during the installation process.
- Use the same arrow direction when installing ACP panels to avoid shade variation caused by surface orientation, especially when using metallic and abstract colors.
- VIVA’s ACP sheets expand at a rate of (2.4 mm/m/100) degrees. Therefore, it is imperative to maintain adequate distance between two ACP claddings to guarantee thermal stability.
- The formula to calculate the distance based on the thermal expansion of the particular length of sheets is: Thermal expansion x sheet length (in meter) x Delta T (Temperature Variation)
- The stiffener and structure should be appropriately aligned to avoid wrinkles in the aluminum panel sheets. (Generally 4 by 4 feet or as recommended by the architect)
- It is essential to take into account the wind pressure of a given altitude and location.
- You must provide batch printing on the bottom of each ACP panel during the subsequent orders to avoid color variations at the time of part-orders.
- Consider the diagonal length of aluminum composite sheets when cutting or grooving to avoid a tapered finish for your panel blocks. The diagonal should not exceed 2mm.
- It is advisable to remove the protective film upon completion of installation. If the protective film is left on for more than 45 days, removing it will be challenging. Avoid pulling the protective film below 10°C.
- Do not remove the protective film with a jerk; do so smoothly and with equal pressure to prevent deflection and humps.
- To prevent color shade variations within a building surface, we recommend our clients order all the VIVA’S ACP panels for a similar project in one order.
- The panels must be weather-proof to prevent thermal movement caused by temperature fluctuations. Otherwise, the ACP panels will bow, and the fasteners will be overstressed to unacceptable levels.
Below is a quick reference guide for the thermal resistance of VIVA’s aluminum panel sheets:
- Thermal Resistance – 50ºC ~ +80ºC
- Linear Expansion 2.40 mm per meter at 100ºC
Keep in mind that the coating integrity will be compromised if the working temperature approaches or exceeds 100ºC. Therefore, the thermal resistance of the wooden ACP sheet also influences the fabrication.