Jetting, also known as jet, worm track, or snake-like pattern, refers to the snake-like curves on a plastic injection molded part along the flow direction from the gate, as shown in Figure 1. 1 Answer. Jetting refers to a molding defect. Jetting refers to a molding defect. It is indicative of an undesirable turbulence and splitting of the flow front. Where molten plastic fails to stick to the mold surface due to the speed of injection. Jetting occurs when polymer melt is pushed at a high velocity through restrictive areas, such as the nozzle, runner, or gate, into open, thicker areas, without forming contact with the mold wall. It is also called a “worm track” which is a descriptive … Usually, the molten resin flows in the form of a jet stream. All Injection molding defects>Solving molding jetting problems Definition Jetting occurs when polymer melt is pushed at a high velocity through restrictive areas, such as the nozzle, runner, or gate, into open, thicker areas, without forming contact with the mold wall. All Injection molding defects>Solving molding jetting problems Definition Jetting occurs when polymer melt is pushed at a high velocity through restrictive areas, such as the nozzle, runner, or gate, into open, thicker areas, without forming contact with the mold wall. Jetting can be defined as a "snake-like" pattern on the surface of a molded part, usually emanating from the gate area. This is … Jetting leads to part weakness, surface blemishes, and other internal defects in …
Under normal circumstances, the molten plastic fills the mold … Where molten plastic fails to stick to the mold surface due to the speed of injection. Possible Causes & Remedies: Machine Cause EXCESSIVE INJECTION …
Jetting is both an appearance and a structural defect in an injection molded part.
However, when flowing from a narrow area to a wide space, if too fast, it sometimes flies out in strips, and flows without contacting the mold. One of these part defects is called “jetting”. Jetting leads to part weakness, surface blemishes, and other internal defects in …
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