People's requirements for the appearance of cars continue to increase, as an important carrier of brand personality expression, the shape is becoming more and more fashionable, the function is more cutting-edge, no longer just a lighting device: headlights, tail lights, interior and exterior lighting, ......Cool light and shadow effects have become an important element in car design. The tail lights have also evolved from ordinary lighting and signal indication to more design and recognition needs. Tail lights mainly include rear indicator lights, brake lights, rear fog lights, rear turn signals and other components.
Compared with ordinary split lights, the through-type taillights have a modern 3D design, combined with smooth lines, to create a strip of light that runs through the entire rear of the vehicle, presenting a penetrating visual effect, making the vehicle more eye-catching and safe in night driving, and you can even identify the vehicle brand by the taillights. The continuous taillights also horizontally widen the visual experience of the car, making the whole body look wider and more luxurious, giving people a simple but luxurious feeling. Continuous taillights have become one of the synonyms of today's lighting trends.
The continuous taillights first appeared in the Lincoln Continental models in the 60s of the last century. And what really carries forward the through-type taillights is the "lamp factory" Audi. Compared with traditional fuel car companies, today's rapidly developing new energy car companies pay more attention to styling design, and the through-type taillights have rapidly penetrated into the new models of new energy brands such as BYD and new forces in recent years by virtue of their high appearance. Through-type taillights have become the common choice and standard configuration of relevant car companies in the design of cars, and have become the embodiment of their family-style design language, otherwise they will not be able to mix in the circle. BYD's seal "sea and sky line", dolphin "geometric fold line", Qin "dragon claw trace", Han "Chinese knot", Yuan "flying feather glimpse" and so on are all through-type taillights. Among the new car-making forces, the "Star Ring Lights" of Ideal models, the "Eagle Wing Tail Lights" of the M5, the "Star Flame Tail Lights" of the Deep Blue SL03, and the "Star Ring Streamer Tail Lights" of AVATR 11 are all equipped with through-type tail lights.
BYD Seal Haitian's first-line waterdrop tail lights.
The Eagle Wing taillights of the M5.
Some models also use continuous lamps in headlights. Volkswagen, Li and other brand models have adopted the design of through-type headlights as a kind of external ambient lighting. At present, Volkswagen's domestic Golf, Range Patrol and other models have adopted through-type headlights, and the through-type front lighting system of Volkswagen models is composed of car logo lights, car logo bezels, grille bodies, through-type light strips, grille decorative strips and light strips. The ideal L9 model uses an integrated star ring LED headlight, with a length of more than 2 meters, without any breakpoints in the middle, and the uniformity, coherence, softness and color temperature are all first-class in the industry, and this is the ideal L9 can be identified from 100 meters away. In addition, many models such as BYD Destroyer 05, Chevrolet Trailblazer, Changan CS75 Plus, Skyline ME5, and Roewe RX5 are also equipped with through-type headlights.
Volkswagen headlights. 
Ideal L9's star ring headlights.
Cool rear end, manufacturing first. The large size of the through-type taillight parts, the pursuit of visual effects, and the increasingly complex internal structure design naturally bring more stringent manufacturing requirements. While improving the safety lighting effect, the through-type taillights are full of science and technology, bringing excellent visual effect and recognition, which is mainly achieved by plastic light guide strips. The light guide strip, which is made of transparent plastic injection molding, uses the law of reflection, refraction and total emission of light propagation to become the indirect lighting method of the car lamp, and its working performance and transparency characteristics lead to its strict requirements for appearance quality, cleanliness, light transmittance and thermal stability.
The light guide strip is light in weight, about 6mm thick and up to 1500mm in length, which is a thick-walled transparent plastic part, and it is easy to produce shrinkage marks, shrinkage holes, depressions, bubbles and underinjection and other defects during the injection molding process. Secondly, the shape of the through-type tail light guide strip is complex, mostly special-shaped long strips, and it is difficult to form. The clamping and injection combination deviates the most, exceeding the existing conventional combination of injection molding machines and placing high demands on the screw and injection molding process. The injection molding process has a great influence on the long light guide strip, and according to the relevant tests and data analysis, the injection process of the light guide strip of the through-type tail light requires the filling process to maintain a stable injection.
In the injection molding industry, the production of optical guides needs to have both high requirements for optics and precision, and has always been known for its high molding difficulty and strict product requirements. The molding raw materials of light guide strips, such as , etc., have high viscosity, sensitivity to moisture, and high requirements for light transmission quality, which need to meet strict optical standards such as light transmittance, thermal stability, shape accuracy, surface gloss, haze, etc. Therefore, in the production process of injection molding, there are strict requirements for process and stability, otherwise it is easy to cause product defects. In addition, the mold of the headlight guide is generally thick, the modulus requirement is high, and the filling amount is not large, therefore, the appropriate mold base and injection equivalent combination is also one of the technical difficulties.
In view of the characteristics and production difficulties of the light guide strip, Haitian Plastics Machinery Co., Ltd. has launched a special solution for light guide The JU light guide special machine is equipped with PC-specific plasticizing components, and the core parts such as screws and barrels are specially treated to meet the requirements of light guide capacity and reduce the production risk of products. The clamping part is based on the JU two-plate structure, which comprehensively improves the mold capacity, and additionally increases the mold thickness on the original basis. The newly developed closed-loop injection function helps low-speed injection molding and solves the stability problem at low speed. Low-speed filling, the melt medium in the thick-walled light guide strip product should be uniform, and the appearance should be smooth and continuous, so as to achieve continuous total reflection of light in the light guide. This solution not only meets the production and manufacturing of long light guide strips (headlight guide, through-type tail light guide, atmosphere light), but also can be compatible with other products to the greatest extent, make up for the market gap with high cost performance, and achieve optical-grade quality.
Another injection molding machine company, Tederic Machinery Co., Ltd., provides mature and leading professional solutions for light guide strips for popular models such as Tang, Qin, Song and Han of BYD, the head brand of new energy vehicles. Tederic Electric Injection Molding Machine Light Guide Strip Professional Solution can reduce the shrinkage marks and warping deformation of the transparent parts of the car light during the injection molding process, meet the appearance quality, light transmittance and thermal stability of the light guide strip, and help manufacturers save energy and reduce costs, and further realize the weight reduction of the car body.
Tederic large-scale electric injection molding machine NEO·E1080 has been sold well in domestic and foreign automobile OEMs, serving applications such as lamp holders, face shields, and large-scale thick-walled light guides. BYD has successively introduced more than 300 electric injection molding machines from Tederic to produce automotive light guides.
Tederic injection molding machine at BYD's production base.
People always like the new and hate the old, although the design of these components is cool, car companies are also happy to use them, but with the application of more and more models, everyone is commonplace, and it is inevitable that there will be aesthetic fatigue. Fortunately, human ingenuity is inexhaustible, and I believe that there will be an endless stream of extraordinary designs to keep our cars from becoming boring.