WebJul 4, 2024 · A meld line is defined as the re-merging of two flow fronts after the plastic flow has been split by a feature within the part design. One way to think of this is to visualize merging onto the freeway after a long day at the office—all the vehicles are going the same direction and have to figure out how to get there without damage. WebJan 4, 2024 · 1. Incompletely fused extrusion knit Line This image shows a PVC pipe after it was accidentally dropped on the ground. The pipe underwent brittle fracture into many pieces because of the high residual stresses in the wall of the pipe. PVC pipes are manufactured by an extrusion process.
Knit Lines and How to Avoid Them - Protolabs
WebIn an injection molded structural plastic part, a weld line (also called a knit line) will result in a region of mechanical weakness as soon as the part is submitted to an external load. The quality of the weld line can be improved through optimized processing conditions, increased mold and melt temperatures, and increased injection speed to WebIn an injection molded structural plastic part, a weld line (also called a knit line) will result in a region of mechanical weakness as soon as the part is submitted to an external load. … rap r\\u0026b
The Plastic Troubleshooter Defect - Knit Lines
WebWhile knit lines can be present it does not always mean the structural integrity of the plastic part is compromised. It is important when selecting an injection molder that the right process conditions are used to reduce … WebAug 19, 2007 · Plastics Engineering general discussion Forum Knit Line Affect On Material Strength thread712-181489 MVPs JMulligan (Mechanical) (OP) 16 Mar 07 10:26 I am looking for a technical explanation of knit line affect on material strength in PC/ABS injection molded parts. Any help would be greatly appreciated. Thank You Joe WebJul 16, 2024 · In the plastic injection moulding industry, we work with materials that are by-products of oil refinement and moulds made of metal casting, so our terminology is … drones peru dji