since molds of high gloss can be directly used to manufacture high-gloss, mrkless and environmental-friendly plastic parts, avoiding follow-up painting technics and corresponding lead content control, which is very beneficial for environmental protection, this public technology shall bring revolution to the concept of designing and manufacturing injection molds in the future, promote technical upgrade in mold manufacturing industry and producing enormous social and economic benefit for the construction of a people-oriented harmonious society.

currently, highlight and weldless molds are used to make planner weldless plastic parts, in the case of flat-panel TV frames, they may not have to require making highlight shell, instead, deep-hole drilling is sufficient to create the media channels on the cavity. most plastic parts have some curvature on its surface. It is difficult to transfer the heat homogenously without using highlight shell, leading to weld lines and deformations.

on the other hand, it may lead to deformation, losing its dimensional accuracy. Highlight shell requires machining on both sides and thus requires high precision alignment of the workpiece on the machine table, when machining the other side. Additionally, dus to the division of the fixed mold component into two parts, the tightening requirement is extremely high in order to seal the media channels, especially after repeated exchange between cooling and heating cycles.

the design also maximizes the pipelines inside the mold and thus allows rapidly raising the temperature to the thermo plastic level. It ensures a smooth flow of the plastic material inside the runner and mold cavity, realize rapid injection, and achieve the production of plastic parts with high strength, stiffness, and luster on its surface. It also minimizes the problems of deformation, dents, welding lines and waves.
After the injection, it allows pumping cool water into the mold to quickly lower the mold temperature and thus shorten the molding cycle, up to 70%.

as for precision injection molding, now a new molding technology will help it, that is so called Highlight and weldless mold. That kind of mold have an innovative mold design and manufacturing process, making use of pressured vapor or fluids as a media to more efficiently and evenly control the heating and cooling process.