Flat-panel TVs side frame forming of new technologies - high-gloss coating-free Seamless Injection Molding (The Three part )
Mold Temperature Control Technology
Precise control of mold temperature is to achieve high optical injection molding to avoid spraying a major key to the current temperature control techniques are used frequently in the following categories:
1. Oil-heated high-temperature mold temperature machine. Mold temperature can be consistently maintained at a constant temperature, the advantage of low cost, easy to use, but in the mold design to be considered a good weld-line treatment, while the material is also relatively higher liquidity requirements. The machine is mainly used in kinds of mold temperature on the appearance of slightly lower demand products.
2. Steam-heated fast-mode technology. This is an early highlight for the plastic forming a Traceless technology, its process principle is: In the mold clamping before and during the course of steam heated molds, mold is completed, the temperature can be carried out to set the conditions for injection; injection mold process to maintain high temperatures, it will give compound in the mold filling process to maintain good mobility; injection completed, the holding pressure cooling, low temperature cooling water molds processing in order to shorten the cooling products time and increase production efficiency.
The process need to quickly generate sufficient amount of boiler steam, and be able to, and injection molding machine interlock signal to achieve closed-loop control, the other also requires materials with good heat resistance and compatibility. Adoption of the technology, mold temperature can reach very high temperatures, there is no weld-line problems, while improving surface hardness, but the boiler into a larger, so there is currently no need to fast-cooled fast heat boiler integrated machine (shown in Figure 3 shown).
