Raw Materials (1) When raw materials are mixed with other impurities or doped with inappropriate or excessive solvents or other additives.
(2) Some plastics such as ABS, etc., which are heated under moisture conditions, will undergo catalytic cracking reactions with water vapor, causing large strains on the parts.
(3) Too many plastics are regenerated or the content of recycled materials is too high, or the heating time in the barrel is too long, it will promote the parts to be embrittled.
(4) The quality of the plastic itself is poor, for example, the molecular weight distribution is large, the content of components containing an inhomogeneous structure such as a rigid molecular chain is too large, or the contamination by other plastics, the contamination of undesirable additives, the contamination of dust and impurities are also caused by brittlenesaspects of the process (1) barrel, nozzle temperature is too low, increase it. If the material is easily degraded, the temperature of the barrel and nozzle should be increased.
(2) Reduce the back pressure and speed of screw pre-molding to make the material slightly loose, and reduce the degradation of the plastic caused by shearing overheating.
(3) mold temperature is too high, mold release is difficult; mold temperature is too low, plastic premature cooling, poor fusion fusion joints, easy to crack, especially in high melting point plastics such as polycarbonate and so on.
(4) The cavity core must have an appropriate draft angle. When the core is difficult to release from the mold, the cavity temperature must be increased and the cooling time must be shortened. When the cavity is difficult to remove, the temperature of the cavity must be reduced and the cooling time must be extended.
(5) Minimize the use of metal inserts, such as polystyrene, which is a brittle plastic with a large cold-to-hot ratio, and it cannot be inserted into injection molding.
Our company also main to design Plastic Products, Paper Products, Wooden Products, Household Products, Stationery Products, Sewing Products and so on
Triple C International (ShenZhen) Co.,Ltd. was established in 2018. It`s a professional foreign trade company engaged in import and export trade, and carries out business operations such as international trade, cooperative production and intermediary trade. The company mainly provides high-quality OEM-product and ODM-product services for customs in Japan, Southeast Asia, Europe and Unite States, and has a professional technical team that provides hundreds of OEM-product services for dozens of customers, and has dozens of excellent suppliers. The company mainly provides sewing products, plastic products, paper products, wooden products, household products and other OEM services, including handbags, gift boxes,
Storage Boxes, stationery boxes, kid toys,
Paper Boxes, school supplies, office supplies and other products import and export business
