What is film cutting? How does the fiber laser cutter cut film products? Is it front cutting or back cutting? First of all, what is film cutting? In order to ensure the surface finish of metal materials, many metal products are coated, which is our common metal material with film. For example, the more common coated metals in our lives include doors, windows, kitchen utensils and other materials. So how to cut products with film? Next, this blog will popularize it for everyone.
Ⅰ.Learn about Stainless Steel Protective Film
Stainless steel film is to protect the processed stainless steel surface during transportation and further production of stainless steel plates, so stainless steel film is also called stainless steel protective film.
Ⅱ.Main Categories of Stainless Steel Protective Films
1.Classified by material:
PVC film, PE film, PET film, etc.
2.Classified by use:
laser film, stretch film, color plate base film, ordinary stainless steel protective film, etc.
3.Classified by thickness:
3C/5C/7C/10C, etc. represent 30mirco/50mirco/70mirco/100mirco, etc.
4.Classified by appearance:
blue film, black and white film, fish head film, KB film, customized printed film, etc.
5.Classification by origin:
domestic film, imported film
6.Classified by pasting:
oil glue film, water glue film, self-adhesive film, electrostatic film, etc.
Ⅲ.How to Cut Single-sided Filmed Stainless Steel
1.Tear-off film cutting：
If it is not necessary to cut with film, under the condition that the film can be peeled off, the first choice is to tear off the protective film before cutting.
2.Direct cutting:
When the protective film is attached with fiber laser film, it can be cut directly. The parameters are basically the same as those without film. (Note: Laser film is divided into fiber laser film and carbon dioxide laser film. The two are different. The requirement for fiber laser film is a black background white film with a viscosity of more than 120 and a thickness of 0. 05-0. 08mm, but not all Black background and white film are all fiber laser films).
3.Evaporation and film removal：
When the protective film is an ordinary film or carbon dioxide laser film and the viscosity is suitable, evaporation and film removal can be used, that is, first use a smaller power laser to burn off the film, and then cut it.
4.Cut the film with the film side down:
We can also put the film on the back for cutting. The advantage of this method is that you don’t have to pick the film. Almost any film can be cut with this method, and the film will not be blown up or have edges.
Ⅳ.How to Cut Double-sided Coated Sheets with Fiber Laser Cutting Machine
It is difficult to cut coated boards because the cutting head can only cut from the top of the board downwards. The protective film on the board has no effect on the cutting process. However, due to the film on the bottom of the board, the film will be produced during the cutting process. The cutting residue cannot be completely dropped. These residues will directly affect the cutting effect of the board, causing the board to be unable to be cut through or there will be large burrs after cutting. However, if all the film under the board is torn off, scratches will appear under the board. .
Ⅴ.What Methods can be Used to Prevent Film Peeling from Occurring?
1.Draw an auxiliary cutting diagram that matches the actual cutting diagram.
The specific method is to mirror the actual cutting chart to directly obtain the auxiliary cutting chart.
2.Calculate the position and maximum offset of the film to be torn off.
Theoretically, you can use the auxiliary cutting pattern to use laser etching on the top of the sheet, etch away the protective film at the cutting position, and then turn the sheet over and cut directly. However, in the actual cutting process, due to the laser positioning error, Due to the influence of the sheet metal shape error, the cutting positions of the front and back sides of the sheet cannot overlap. Therefore, during front-side etching, it is necessary to measure the accurate offset and tear off the protective film at the offset position.
3.Draw cutting drawings and auxiliary cutting drawings.
The cutting drawing can drawn directly according to the shape of the workpiece. For the auxiliary cutting drawing, the actual cutting drawing is first mirrored, and then offset using the set error value.
4.Carry out laser cutting drawing layout.
Here you need to typeset the auxiliary cutting drawings first. Secondly, mirror the layout of the auxiliary cutting diagram and remove the etching lines, leaving only the actual cutting diagram.
5.Carry out laser cutting.
First, make a plate for etching, then tear off the protective film at the laser incision. After tearing off the protective film, turn the steel plate over, and then cut the workpiece.
