Defects And Solutions For Injection Molding Cracking is a common defect of plastic products, and the main reason is due to stress deformation. There are mainly residual stresses, external stresses, and stress deformations caused by the external environment. (1) Crack caused by residual stress Residual stress is mainly caused by the following three conditions,…
DetailsProduction Process Characteristics Of Injection Molding Two-Color Products First, the two-color injection molding machine consists of two sets of plastic injection devices with the same structure and specifications. The nozzles need to have a special structure according to the production method, or two sets of molding dies having the same structure that can be rotated…
DetailsTwo-Color Mold Structure The traditional two-color injection mold has two forms: “punch shift” and “punch rotation”. First, the “male shift” mold has two female molds and one male mold. When the first cartridge is shot, the punch is closed with the first die to complete the injection of the first plastic. After the first plastic…
DetailsGas Assisted Injection Molding The gas-assisted injection molding system uses an inert gas (usually nitrogen) directly injected into the plasticized plastic in the cavity through the sectional pressure control system to expand the interior of the plastic part to create a hollow shape, but still keep the surface of the product intact. Gas-assisted injection molding…
DetailsInjection Molding: Process Analysis Of Six Recycled Plastics First,recycled low density polyethylene (LDPE) process LDPE, the scientific name of high-pressure polyethylene, generally refers to plastic packaging film. Such as: woven bag inner liner film, food packaging film, daily necessities packaging film, greenhouse film. Most of these films are natural, light blue, and black. It is…
DetailsSolutions For Shrinkage Of Plastic Parts The problem of shrinkage of plastic parts (surface shrinkage and internal shrinkage) is due to defects caused by insufficient filling of the melt when the thicker part is cooled. We often encounter situations where the pressure is increased, the water inlet is increased, the injection time is prolonged, and…
DetailsMould Manufacturing Finishing Process – Surface Treatment And Assembly The surface of the part is left with tool marks and wear marks where stress is concentrated and is the source of crack growth. Therefore, after the machining is completed, the parts need to be surface-strengthened, polished by fitters, and the hidden troubles in processing are…
DetailsFifteen Tips For The Maintenance Of Injection Mould Compared with other molds, the injection mold has a more complex and precise structure and requires higher requirements for operation and maintenance. Therefore, during the entire production process, the use of positive solutions and meticulous maintenance, maintenance will maintain the company’s normal production and improve the company’s…
DetailsMould Manufacturing Finishing Process – Grinding Of Parts There are three main types of machine tools used in grinding: surface grinders, internal and external cylindrical grinders, and tool grinders. The grinding deformation and grinding cracks must be strictly controlled during finishing grinding. Even very small cracks will be revealed during subsequent processing. Therefore, the feed…
DetailsMould Manufacturing Finishing Process – Electric Machining Control The modern mold factory can not be lack of electrical processing, electrical processing can be all kinds of special-shaped, high-hardness parts for processing, it is divided into two kinds of wire cutting and EDM. The walking wire cutting accuracy can reach ±0.003mm and the roughness Ra0.2μm. At…
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