Molding processing of polycarbonate film
DATE：2019/6/27 9:26:38 / READ： / SOURCE：This station
Molding processing of polycarbonate film
For container molding from polycarbonate film or sheet, you can use vacuum forming or thermoforming methods such as air pressure. When using polycarbonate, pay attention to the following problems.
Thermoforming
For container molding from polycarbonate film or sheet, you can use vacuum forming or thermoforming methods such as air pressure. When using polycarbonate, pay attention to the following problems.
1) The drawing ratio is the ratio of the depth of the finished product to the maximum diameter of the finished product. It is an index to measure the difficulty of forming. The thicker the diaphragm, the smaller the mold and the draft angle relative to the area of the diaphragm. The larger the arc size, the larger the drawing ratio. If the film thickness is 0.4 mm, the drawing ratio is about 0.6, but in order to make the thickness distribution appropriate, it is better to use the pressure-proof plug when the drawing ratio is 0.5 or more.
2) The molding shrinkage rate varies with the temperature of the metal mold, and is generally around 10/10000-20/1000.
3) The mold temperature is preferably heated at 100 to 120 ° C, and attention should be paid to the deformation caused by residual stress.
4) Sheet heating, if the heating time is too long, it will increase the "sagging" due to the weight of the sheet, and the heating density is high, and the heating time is short. In addition, the common sheet forming temperature range is relatively narrow (175 -195 ° C), if using a single machine, the time from heating to thermoforming should be as short as possible.
5) Drying, the sheet of 0.5mm or more will cause foaming during thermoforming due to absorption of moisture, and measures such as pre-drying or moisture-proof packaging must be taken.
2. Secondary processing
1) Vacuum aluminum plating, good metal plating, no need for primer.
2) Composite, using extrusion compounding or dry compounding. When dry compounding, care must be taken to select the same solvent as the printing ink.
3) Printing, usually using gravure printing method, also applies to convex printing, screen printing, but sometimes it may cause cracks due to different solvents, so pay attention to the choice of solvent, in addition, you must also take appropriate printing pressure and Take up the tension.
4) Bonding, the thermoforming container and the cover material are preferably bonded by heat sealing, and the hot-melt type adhesive is applied to other materials such as aluminum foil.
For container molding from polycarbonate film or sheet, you can use vacuum forming or thermoforming methods such as air pressure. When using polycarbonate, pay attention to the following problems.
Thermoforming
For container molding from polycarbonate film or sheet, you can use vacuum forming or thermoforming methods such as air pressure. When using polycarbonate, pay attention to the following problems.
1) The drawing ratio is the ratio of the depth of the finished product to the maximum diameter of the finished product. It is an index to measure the difficulty of forming. The thicker the diaphragm, the smaller the mold and the draft angle relative to the area of the diaphragm. The larger the arc size, the larger the drawing ratio. If the film thickness is 0.4 mm, the drawing ratio is about 0.6, but in order to make the thickness distribution appropriate, it is better to use the pressure-proof plug when the drawing ratio is 0.5 or more.
2) The molding shrinkage rate varies with the temperature of the metal mold, and is generally around 10/10000-20/1000.
3) The mold temperature is preferably heated at 100 to 120 ° C, and attention should be paid to the deformation caused by residual stress.
4) Sheet heating, if the heating time is too long, it will increase the "sagging" due to the weight of the sheet, and the heating density is high, and the heating time is short. In addition, the common sheet forming temperature range is relatively narrow (175 -195 ° C), if using a single machine, the time from heating to thermoforming should be as short as possible.
5) Drying, the sheet of 0.5mm or more will cause foaming during thermoforming due to absorption of moisture, and measures such as pre-drying or moisture-proof packaging must be taken.
2. Secondary processing
1) Vacuum aluminum plating, good metal plating, no need for primer.
2) Composite, using extrusion compounding or dry compounding. When dry compounding, care must be taken to select the same solvent as the printing ink.
3) Printing, usually using gravure printing method, also applies to convex printing, screen printing, but sometimes it may cause cracks due to different solvents, so pay attention to the choice of solvent, in addition, you must also take appropriate printing pressure and Take up the tension.
4) Bonding, the thermoforming container and the cover material are preferably bonded by heat sealing, and the hot-melt type adhesive is applied to other materials such as aluminum foil.
Author：admin