The quality of the plastic parts of the mold is as good as the molding process. The company you choose to help your products must be competent enough to deal with common molding problems so that in the end you have the glossy details that brought you the results you expected from the products. The injection molding process is used to produce all kinds of objects, including garden tools, electronic and even kitchen utensils, and others. Components can be made of glass, polymers, metals and plastics.
Defects may arise from the mold, raw materials used in the injection molding process. Fortunately, there are so many ways to eliminate and prevent injection molding defects, and using these approaches, your manufacturer will be able to make the highest quality injection molds. Here are some of the things you can do to avoid defects and get high-quality forms and details at the end.
1. Marking consumption - They are distributed in narrow areas of the components and can be considered as minor or serious defects depending on the product and the expected use. To avoid defective appearance, the manufacturer must increase the diameter of the nozzle, the injection pressure injection rate. Increasing the temperature of the cylinder can also help prevent this defect for high-quality parts at the end.
2. Dim areas - The most common are dim concentric rings that can appear around the sprue like a halo. This usually happens when a poor flow of material and high viscosity occurs. Contrary to what many might think, this is not a packaging defect, but rather a defect that occurs at the very beginning of the filling cycle. To minimize the possibilities, the injection rate profile must be aligned so that the flow rate is uniform in the filling phase. It may also be useful to increase the pressure on the screw and the temperature of the cylinder to reduce dull surfaces, which are the result of low melt temperatures. For dull surfaces caused by design problems, it can be a means of reducing the radius between the part and the shutter.
3. Burn marks - This is typical for plastic forms, and they look like dark red or black spots. This can be considered a minor defect that occurs due to excessive melt temperature, overheating, when there is trapped air and an excessive injection rate. Corrective actions for such defects in your areas include lowering the temperature, shortening the cycle time and slowing the injection rate. The manufacturer must also ensure that there are sufficient door sizes and gas vents to eliminate the problem of trapped air, which leads to this defect.
4. Shine options - The difference in gloss on textured surfaces tends to be more noticeable, and your part may have an irregular gloss, even if the surface texture is uniform. This is a problem associated with poor replication of the mold surface in some areas. It can be fixed by raising the temperature of the melt or form, or even holding pressure. With increasing pressure time increases the probability of obtaining accurate replication of the form.
