The definition of weld lines: When multiple plastic flow fronts meet in the cavity after encountering inserts, holes, or areas with inconsistent flow rates or interrupted melt flows, or in the case of gate injection filling, the inability of two or more flow fronts to fully “knit” together will cause the linear weld marks. The appearance of weld lines greatly reduces the mechanical strength of the product. The solution to the weld lines is basically the same as the method for reducing product sink marks.   I. Equipment To respond to poor plasticization and uneven melt temperature, the molding cycle can be extended to make plasticization more complete, and select the molding machine with a higher plasticizing capacity when necessary.     II. Mold (1) When the mold temperature is too low, raise the mold temperature appropriately or purposefully raise the local temperature at the weld seam.   (2) When the runner is too small, narrow or shallow, and the cold...

Flash, also known as flashing or burrs, mostly occurs between the matching parts of a mold, such as the parting surface of the mold, the sliding part of the slider, the clearance of the insert, and the gap of the ejector, etc. If the flashing is not resolved in a timely manner, it will be further worsened, so that the mold will be pressed to cause local collapses or other permanent damages. The flashing occurring in the clearance of the insert and the gap of the ejector will also cause the product to stick on the mold, thus affecting ejection.   Flash is actually the excessive plastic material which enters the matching gaps of the mold and is attached to the final product after cooling. It is very easy to solve the problem of flashing, i.e., keeping the melt out of the matching gaps in a mold. The plastic melt usually enters the mold matching gaps in two scenarios: one is that the mold matching gap is large, making it easy for the melt to get in; the other is that the mold matchin...

CNC Machining For the Energy Industry   In 2021, the total U.S. energy consumption was equal to around 97 quadrillion Btus. This energy comes from a variety of different sources, including coal, nuclear, natural gas, and renewable energy. In order to keep up with increasing demand, the energy industry has needed to innovate highly efficient and long-lasting technologies.      A crucial part of the success of this innovation has been CNC machining in the energy industry. In recent years, many organizations in the energy industry have turned to CNC machining for its many advantages. Read on to learn more about how CNC machining in the energy industry is used and why it is such a vital component.   Uses of CNC Machining in the Energy Industry   Conventional turbines and generators rely on fossil fuels to generate power for homes all over the country. These units are made up of thousands of components, some of which are huge and some of which are incredibly sm...