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LED Spot Lights Widely Used
Jul 11, 2017

With the extensive use of high-power LED lighting in the lighting industry, LED secondary light distribution lens production has become a new industry, LED Spot Lights so that optical mold has been a great development. LED Spot Lights Uneven wall thickness plus a lot of optical free surface is a typical feature of optical LED spotlight lens products, in addition to the requirements of the appearance of quality and size requirements, the optical performance there are very high requirements, such as: lens spot, lens efficiency As well as the angle of the lens. The quality requirements of these products on the mold requirements have become more demanding, LED Spot Lights the rationality of the mold structure directly affect the production efficiency, product quality and cost. In the test mode often found that adjust the injection process parameters to achieve a qualified product is very difficult, the mold structure must be optimized design.

Long flow of the mold has a lot of drawbacks, LED Spot Lights mainly in the following two aspects.

(1) waste of raw materials. In the mold cost control, the control of raw materials is a large part, and for the cold runner mold, the main waste material is reflected in the pouring system above the condensate. The small diameter of the main channel is a nozzle diameter constant, LED Spot Lights the taper is determined by the fluidity of the material. The diversion channel diameter will also be affected by the main channel. LED Spot Lights So in the case of mass production, the mainstream channel is a great waste of material.

(2) process than the impact of large injection molding process parameters, increase the difficulty of trial mode. Mold forming the three major process parameters for the time, LED Spot Lights temperature and pressure. The temperature contains the mold temperature and the material temperature, the material temperature and the temperature of the mold are mainly determined by the viscosity of the material, LED Spot Lights and the influence of the flow channel structure is relatively small. Molding time, injection time and cooling time are mainly affected by the size, thickness, mold temperature and gate number of the product. But the injection pressure is largely affected by the length of the runner. (1) can be seen, the injection pressure and flow length is proportional to the increase in the length of the flow, the required injection (Figure 1) can be seen, LED Spot Lights the injection pressure and flow length is proportional to the increase in flow length, the required injection The pressure is also a corresponding increase in the injection of the general use of medium pressure injection, LED Spot Lights because the high injection pressure is easy to make the machine overload phenomenon, the injection molding machine will produce too much energy consumption, increase injection costs.

As the long flow channel mold in the molding of the many problems, the optimization method is to shorten the flow channel. The flow path refers to the length of the nozzle from the injection molding machine to the gate position. Therefore, the core idea of improvement is by changing the position of the injection molding machine nozzle to change the length of the flow channel.

Mold casting system design and injection molding machine has a great relationship, the mold part of the size of many parts are determined by the size of the injection molding machine. The diameter of the main channel of the mold is 0.5 ~ 1 mlTl larger than the size of the nozzle of the injection molding machine. The ball radius of the main channel bushing is 1 ~ 2 1Tin2 than the radius of the ball head of the injection molding machine nozzle. LED Spot Lights The diameter of the positioning ring should be less than or equal to the diameter of the injection molding machine, and the height is higher than the upper surface of the die set plate 8 to 15 1TIITI. LED Spot Lights Taking into account the two must meet the conditions, the positioning ring and the main channel bushing can be designed as a whole structure. The conventional structure will make the mainstream channel very long. Injection molding machine nozzle structure and size shown in Figure 3, the mold of the positioning ring structure and the main channel bushing structure design, here referred to as the mouth. The nozzle design of the opening hole d, the size of 701Tlln, LED Spot Lights far greater than the injection molding machine nozzle diameter 30 l'nlTl. Injection molding time, the injection molding machine nozzle directly into the positioning circle hole,