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NCK Technology Co.,Ltd

Optical Product Components Injection Molding Is Very Important

Optical lens (glass) is widely used in various fields, is a variety of precision equipment, the core parts, and optical products components of optical products injection molding is a variety of plastic products manufacturing methods of mass production.

With the rapid development of image technology, people can record the events, scenery and characters around them in their own camera or cell phone anytime and anywhere. And the core parts of these High-tech products are high-precision optical components. In the past, the optical lenses are mainly made of glass, but the glass inevitably has the disadvantages of large quality, brittleness and high price, Optical Products Component Injection Molding so in recent years people began to choose polymer materials instead of glass lenses, and gradually used in the communications industry, medical devices, the automotive industry, as well as the information industry. The key to realize mass production is the injection molding of optical product components.

As we all know, optical product Parts injection molding is widely used in plastic parts production, but the traditional optical product components injection molding technology is difficult to achieve the accuracy of optical components. To achieve the desired dimensional tolerances and surface quality, Optical Products Component Injection Molding the entire process chain must be optimized. After years of research, can now through the precision optics product parts Injection molding technology to produce more function, the price reasonable precision optics element, Optical Products Component Injection Molding satisfies the market demand.

Precision Machining is also an important part of the injection molding of optical components. Mold processing must be precision machining and close coordination of the Assembly process. If you don't have a good control of this part of the dimensional tolerances, later optical product Parts injection molding processing will be difficult to repair the size tolerances of plastic parts, Optical Products Component Injection Molding or allow the adjustment of the optical product components injection molding parameters are narrower. With the development of high speed cutting, it can be predicted that the precision high speed multi-axis milling will gradually replace the EDM (discharge processing).

In order to make the mold inserts to meet the quality requirements, the single crystal diamond can be used as the cutter of the machine tool for turning. The biggest drawback of diamond turning is that it is not possible to directly cut ferrous metals, such as steel, because the iron can wear the diamond very quickly. At present, Optical Products Component Injection Molding some enterprises have done some research in heat treatment process, which is to improve the cutting performance of alloy tool steel to achieve the effect of single crystal diamond turning. The initial results look very promising. Of course, we must also pay attention to the turning or milling tool itself, because the carbide tool after high-speed turning, the blade will wear, you need to use precision grinder grinding blade tool tip. We should attach great importance to the cutting plane and cutting edge of these cutters, even if the minimal imperfections on the cutting edge are reflected in the molded product.

Optical product Components Injection molding process can be divided into two types: traditional optical product components injection molding and injection molding compression molding. During the injection molding of the traditional optical products, the internal stress will be produced during the plastic cooling process, Optical Products Component Injection Molding which can change the properties of the plastic parts and cause the lens polarizing. In order to overcome this potential internal stress, one of the treatment methods is plastic parts annealing treatment, but this method will make the plastic parts deformation, not very suitable. It is now possible to use injection molding compression molding, injection molding compression molding is often used to shape products with fine structure, such as a plastic lens with diffractive function, it is different from the traditional optical product parts injection molding process. The parameters of forming process are summarized as follows:

Injection pressure (holding pressure): greater than 100MPa (due to plastic parts or materials); injection rate: Because of mold, plastic parts, materials and determined; Plasticizing temperature: 200~320℃; mold temperature: 100~150℃; Molding period: 0.5min above.

Because the precision optics product part injection molding belongs to the new injection molding method, therefore its molding parameter has no experience to draw lessons from. In order to obtain the suitable molding parameters, the following methods can be used to try. First, the design and manufacture of a set of injection mold (no shrinkage rate), the second step to select one of the optical product components injection molding parameters, dividing it into several differential, one by one for injection optimization. The shape and size of the injection mold are modified according to the plastic parts. The process parameters obtained by this method often have high stability and accuracy. Of course, to implement this program must have sophisticated measurement equipment (three coordinate measuring instrument), Advanced tooling workshop (multi-axis Milling Center) and the design part of the mathematical ability (simulation analysis)

In order to obtain strict dimensional tolerances for the plastic parts, the injection moulding of precision optical products must be considered from the outset. Considering the factors such as optical design, product structure design, forming process parameters and forming equipment, Optical Products Component Injection Molding the factors of these interactions are considered as a whole, and can not be neglected. Therefore, we need to employ a number of high technology and experienced design engineers, they can complete such as optical design, product structure design, tool design, finite element analysis and mold flow analysis work. On the other hand, although most of the operations of the injection molding process of optical components are now controlled by computers to achieve fully automated production, Optical Products Component Injection Molding there is still a need for highly educated high tech personnel in the workshop. Because the control of the injection molding process of the precision optical product components is one of the most cutting edge technologies in the field of optical product injection molding. Its typical feature is that the injection molding machine has advanced control interface, need someone uninterrupted monitoring, and timely adjustment of key process parameters, so the human factor is very important.

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