1, cursor problem
In the process of automatic packaging of composite film coil, it is often necessary to carry out positioning heat synthesis and positioning cutting. It is necessary to set up an electric eye cursor to position. The size of the cursor, different screw packaging opportunities have a certain difference. It is generally required that the width of the cursor is greater than 2mm and the length is greater than 5mm. The cursor generally uses a dark color with a large contrast to the background color. It is best to use black. Generally, red and yellow can not be used as the cursor color, nor can the color mark of the same color as the optoelectronic eye be used as the cursor color. For example, the optoelectronic eye's light is green. light, You can not use a light green color as the color of the eye cursor, because the green photoelectric eye can not recognize the green color. If the background color is a darker color(such as black, dark blue, dark purple, etc.), the cursor should be designed as a light-colored cursor that is hollow and exposed.
The general automatic screw Packing Machine's electric eye system is a simple identification system. It can not have the same intelligent length function as a bag maker. Therefore, within the vertical range of the electric eye cursor, the film does not allow any interference with the text and patterns. Otherwise, it will cause identification errors. Of course, there are some more sensitive electric eyes, and the black and white balance can be precisely adjusted. For some light-colored interference signals, it can be removed by adjusting, but the color of the pattern interference signal similar to the cursor or darker can not be removed.
The spacing between the cursors is used to determine the length, so the error between the actual spacing and the design value can not be too large. Generally, only 0.5 mm error is allowed. For many automatic packaging devices, the negative deviation is better than the positive deviation tracking effect, so it is recommended that the design be negative deviation.
Aluminum plating or pure aluminum has a strong mirror reflection, which will affect the identification of the electric eye. It is recommended that the composite film cursor be printed with a white bottom. For transparent composite membranes, it is also recommended that the cursor be printed with a white background due to the color of the item that is in contact with it, thereby reducing interference.
2, hot seal extrusion PE problem
During the hot sealing process, PE of the composite membrane is often extruded and glued to the hot sealing membrane. The more the product is accumulated, the more normal production is affected. At the same time, the extruded PE oxidizes smoke on the hot sealing die, causing odor. Hot seal extruded PE can generally be solved by reducing the heat seal temperature and pressure, adjusting the formula of the heat seal layer, and modifying the heat seal film to reduce the pressure of its edge part. However, the practice proves that the best solution is to use the extrusion composite process to produce the composite film, or to increase the speed of the screw Packer, so that the PE can not be squeezed out to the hot seal film.
The above content is the information provided by Dongguan screw packing machine manufacturers for everyone. It is not yet completed. If you want to learn more about relevant information, please pay attention to the news dynamics of liyou machinery's official website. Liyou Machinery focuses on the development and production of electro-optic flower equipment, folding box machines, folding box machines, suction bubble shell Packers, screw packaging folding box machines, aircraft box folding box machines and so on.
