Posts tagged "plastic injection molding"

Plastics, a polymer, have a wide variety of processing methods. Each method has its advantages and disadvantages and is better suited for a specific application. Let’s see how they are processed next with the relevant interesting motion pictures! Injection Molding Machines Injection Molding Injection molding is a manufacturing method in which parts are made by injecting material into a mold. The primary method of processing plastic is injection molding. In this process, the plastic is

causes of silver lines in injection molded products Silver pattern of injection molded products, including surface bubbles and internal pores. The main reason for the defect is the interference of gas (mainly water vapor, decomposition gas, solvent gas, air). The specific causes are analyzed as follows. 1. On the machine. (1) barrel, screw wear or over rubber head, over rubber ring exist material flow dead space, long-term heat and decomposition. (2) heating system out of

The causes and solutions of transparent defects in injection molded products Melting spots, silver lines, cracks polystyrene, plexiglass transparent parts, sometimes through the light can be seen some shiny filament-like silver lines. These silver lines are also called scintillation spots or cracks. This is due to the stress in the vertical direction of the tensile stress, the use of the right polymer molecules heavy flow orientation and the unoriented part of the folding rate differences

Analysis of the causes of shrinkage and depression of injection molded products In the process of injection molding, shrinkage and depression of products is a relatively common phenomenon. The main reasons for this situation are. 1. Machine aspect. (1) the injection nozzle hole is too large to cause shrinkage due to reflux of molten material, too small resistance to the amount of material is not enough to appear shrinkage. (2) Insufficient clamping force will also

Analysis of color stripes and color lines of injection molded products Although the color masterbatch coloring is better than dry powder coloring and dyeing paste coloring in terms of color stability, color purity and color migration, the distribution, i.e., color particles in diluted plastic in the mixing uniformity is relatively poor, and the finished products naturally have regional color differences. Main solutions. (1) increase the temperature of the filling section, especially the temperature of the

Analysis of the causes of cracking of injection molded products Cracking, including the surface of the parts filamentary cracks, micro-crack, top white, cracking and caused by the parts sticky mold, runner sticky mold or trauma crisis, according to the cracking time divided into demold cracking and application cracking. There are mainly caused by the following aspects. Processing. (1) processing pressure is too large, too fast, the more material filling, injection, holding pressure time is too