The Poor Glossiness Problem In injection Molding
The products are provided with uneven surface glossiness and are even covered with shades. The causes whereof comprise: […]
The products are provided with uneven surface glossiness and are even covered with shades. The causes whereof comprise: […]
Strategies vary for staying focused on increasing profitability and for remaining competitive in today's global economy. Machining is an essential process for the strategy of mold builders. This includes a focus on selecting and using the right cutting tools for each application. The first step to properly setting up each job that hits the shop [...]
Creating the most effective hot runner system design that includes manifolds, nozzles and full hot-halves demands a collaborative approach among the moldmaking supply chain: mold builders, molders, original equipment manufacturers and technology suppliers. […]
Mold manufacturers are under pressure. Shocking revelation, right? End customers demand or even expect to see increasing levels of quality, accuracy and consistency. […]
The injection molding industry generally perceives companies that use hot runner systems as more advanced than companies that use cold runner systems. Often, shops make the decision to use a hot runner without considering a cold runner’s possible cost and quality benefits, or management dictates the decision as part of a cost-savings initiative. [...]
In many cases, the cold runner system is a more viable option. In some applications, it may provide a mold and a process that is capable of producing higher-quality parts. […]
During the injection and filling process, the plastic melt enters into the clearance of parting line,clearance of sliding surface of the slide, gap between inserts and holes of ejector pin which are related with mold cavity structure, and overflow thereby occurs […]
There may be a variety of solutions, especially for some specific situations, but the general solutions include: […]
During the process of injection molding, due to the poor exhausting condition of molds, the water vapor in the melt, the air in cavity, the volatile gas from volatile substance in raw materials as well as the material decomposition gas either remain inside the products to form air bubble or are stored in between the [...]
As for molding technics. Air bubble or air cavitation may occur in the plastic parts due to improperly-controlled material temperature and mold temperature, overfast injection speed, overlow injection pressure, too large or too small quantity of injection, insufficient dwell, unbalanced or insufficient cooling etc. […]