Clear Plastic Injection Molding parts usually made in PC, POM, PMMC, AS, PET, these clear plastic kits used widely in different application, such as auto light, medical devices, cosmetic packing, food container, water tank etc.
Jaw crusher equipment is the main ore dressing crushing equipment. It is not only widely used in the mining industry, but also widely used in the processing and crushing of artificial sand, stone production and construction waste. In recent years, domestic mining machinery manufacturers such as crushers have begun to focus on the research and development of new intelligent and efficient crushing, especially the improvement and upgrading of coarse crushed jaw crushers to continuously improve the crushing efficiency of jaw crusher equipment. To produce high quality materials.
Luoyang Dahua Heavy Machinery Co., Ltd. is a well-known mining equipment R&D and manufacturing enterprise in the industry. Its crushing equipment such as jaw crusher has the characteristics of high crushing efficiency, low energy saving and environmental protection, and easy replacement of wearing parts. PE series The crusher and ASJE series are high-quality coarse crushing equipment that can be used for the crushing of hard ore. It can also be used as the preferred coarse crushing equipment for sandstone manufacturing, steel slag treatment and construction waste complete crushing equipment. Luoyang Dahua Heavy Machinery insists on providing high-quality product development concept for customers, increasing R&D investment, perfecting after-sales service, striving to meet customer needs to the maximum extent and realize customer value.
Comparing with other colored parts, strict requirements for appearance is a must for transparent Plastic Parts, which makes the injection molding processing more complex. Mold Design and injection molding condition are all determined factors to the final result, there are a few problems happen frequently in clear Plastic Molding process, we provide some solutions as below.
Silver streak: during the filling and cool-down process, the internal stress generated in the vertical direction and the orientation of resin flow occurs, while non-current orientation flow and orientation flow have different refractive index flash silk pattern, After its expansion, the clear plastic parts may be weak in strength.
Annealing is one of the options, for example, plastics in pc material can be heated to above 160 ℃ for 3 to 5 minutes, and then the natural cooling. As the silver streak is mainly because of the wet resin, so make sure the resin is dry before processing.
Air bubble: during injection molding process, the water and air in the resin are trapped inside the cavity or because of un-sufficient filling, excessive cooling cause a "vacuum bubble".
There are below methods to solve it:
Surface gloss defects: the possible reason is mold surface itself is not polished well, or the resin cooled down too fast so the resin are not actually in molded state, in this case, the injection molding temperature and ejection pressure need to be adjusted higher, cooling time need last longer.
Flow marks: the reason is because the melt viscosity is too large, the advanced melt flow has been condensed in the cavity, then coming melt flow after the condensation surface, leaving the surface with flow marks.
Solutions: optimize the melt flow, increase molding and mold temperature, ejection pressure, add vents, and use lubrication as less as possible.
Clear plastics production sometime could cause the producer a big loss because of the high appearance requirement, the re-grinded materials is not possible to be used again, any slight contamination of raw materials could cause whole batch of molded parts failure, mold making is required to be in a good condition.
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