The raw materials commonly used for injection lenses are highly transparent PC and PMMA. Impact-resistant, wear-resistant, and inexpensive are their advantages. Its advantages are good transmittance, and the processing technology is simpler than that of PC, which can be processed by rotary vertical horizontal injection molding machine.
For the injection molding of spectacle lenses, the quality problems that are generally prone to occur are: tremor marks, macula, white spots, internal stress, etc., and most of these problems can be solved by choosing the right injection molding machine.
Vertical horizontal injection molding machine for optical spectacle lens molding needs to pay attention to the following performance indicators:
1. Barrel cleaning capacity
For injection molded lenses, if temporary shutdown is required, there should be a special cleaning design on the screw, and cooperate with the cleaning program to prevent the material from being stored in the barrel for too long and causing problems such as material property changes.
2. Vertical horizontal injection molding machine injection reaction rate
For the injection molding of lenses, the response speed is very important, and low-speed injection should be used at the nozzle, and the work-in-progress should be immediately raised to high-speed injection to reduce the possibility of vibration marks and other phenomena.
3. The accuracy of the repeated positioning of the mold
The vertical horizontal injection molding machine should have a high clamping and resetting accuracy, so as to ensure the stability of production: especially the performance of these key parameters, and the stability and yield of the product are visibly improved.
