Key Points Of Light Guide Plastic Frame Injection Molding

  Light guide plate plastic frame injection mold making points

  Light guide plate introduction plastic frame principle: the said light guide plate is optical grade acrylic sheet to absorb the light shot in the optical grade acrylic sheet face stay from the light, when the light point incident to each light guide, the light will be reflected to each angle spread and destroy the reflection conditions from the front light guide plate shot. Light guide plate is the use of optical grade acrylic / PC sheet, and then with a very high refractive index and does not absorb light of high-tech materials, in the optical grade acrylic sheet bottom with laser engraving, V-shaped cross grid engraving, UV screen printing technology printed on the light guide point. The use of optical grade acrylic sheet to absorb the light from the lamp in the optical grade acrylic sheet surface of the stay table lamp guide plate so that the light guide plate light refraction into a surface light source even light state manufacturing molding. Products using the spectral analysis principle and digital UV printing technology combined with constant temperature, humidity, dust-free environment conditions made. With ultra-thin, ultra-bright, light uniformity, energy saving, environmental protection, no dark areas, durable, not easy to yellowing, installation and maintenance is simple and fast and other distinctive features of non-standard round light guide plate ordinary energy-saving lamps than, simply not power saving! So, this is why LED flat panel lights need to be equipped with high-quality, high-efficiency drive power supply! There is no "power factor table" used to detect the power factor of LED lighting consumers, there is a way to use the "ammeter" to detect two nominal power of similar products of various densities, the size of the light guide light spot, light guide plate can be uniformly light. The use of reflective sheet exposed to the bottom surface of the light reflected back to the light guide plate improves the efficiency of light use.

  The key point of light guide rubber frame: light guide rubber frame should be determined according to the product size and module number and machine tonnage to determine the frame size. Guide plate rubber frame ejector system: In the case of producing reasonable ejector pin (note: ejector balance, smooth demoulding) as little as possible to reduce the burning fracture rate and excessive burrs that produce thermal expansion of the ejector pin (to focus on the plastic frame). Light guide plate frame cooling system (Remark: mainly to keep the mold constant temperature) must be done well to ensure normal production. Light guide plate rubber frame exhaust system (Remark: mainly to eliminate the gas generated in the mold cavity and the gas generated by the resin during the molding process, to reduce the resistance and prevent the front-end resin from burning or generating gas pollution) should be reasonably located (more light sources), and the depth z is controlled below 0.03 mm. Guide plate frame demoulding system: The mould should have a demoulding slope (the slope depends on the structure and thickness of the product), the cross section of the mould should be polished to save the mould and make the demoulding in the production properly. Cold material well with light guide plate and rubber frame, the depth z is controlled at 2ー4mm, mainly a small amount of cold glue in front of the nozzle. The location, size and quantity of the guide plate rubber frame rubber frame foot sprue should be reasonable (so as to control the size, deformation, local burr and molding difficulty of the product)

  Second: light guide plate rubber frame test points: light guide plate rubber frame first confirm the product drawing file and mold code is consistent, and then look at the product size to determine the machine tonnage and machine number... Light guide plate rubber frame in the mold movement, molding force, ejector length, robotic confirmation OK, the first test mold to avoid the phenomenon of mold support (which is good maintenance for the machine) first machine injection pressure, speed is relatively small, the location of the enlarged point, and then according to the experience of the product can not be too large, and then slowly debug OK according to the molding situation. Guide plate rubber frame products after molding appearance, once the quality control to confirm the product structure, and then re-size and guide plate optical effect . The following details should be noted.

 One: normal injection (ejector pin length, balance spring strength of the top)

Is the demoulding smooth (see if there is sticky mould)

whether the cooling circulation channel is open (whether it is leaking, whether it is blocked) ,

d: for moulding difficulties, if the exhaust system is determined

E: the correct location and number of gates (mainly used for plastic frames), ,

f: whether the product is deformed (to see whether it is unbalanced ejector, or residual stress sticking to the mold), the above issues are very important for smooth production, and need to communicate with the mold department and improve as soon as possible for production.