Talian Kimpalan
Kecacatan mengalir pada permukaan produk atau kecacatan linear yang disebabkan apabila bahagian hadapan cair bertemu antara satu sama lain selepas terbelah.
Garisan kimpalan merujuk kepada garisan yang berlaku pada permukaan produk plastik apabila slug sejuk cair. penyelenggaraan dan penyelenggaraan bahagian plastik kereta juga sangat penting, penyelenggaraan dan penyelenggaraan bahagian plastik kereta juga sangat penting, penyelenggaraan dan penyelenggaraan bahagian plastik kereta juga sangat penting, tanda kimpalan linear cenderung berlaku disebabkan oleh ikatan yang tidak sempurna. The existence of weld lines greatly compromises the mechanical strength of a product. The solution for overcoming weld lines is similar to that for reducing product sagging. Weld lines can be caused by many reasons, which covers the various aspects of mold, proses, raw materials and product design, dan lain-lain.
(1)Injection Machine
Poor plasticization and non-uniform melt temperature – appropriately extend the injection molding cycle, to ensure thorough plasticization, and change for a machine with a larger plasticization capacity when necessary.
(2)acuan
①Mold surface is too cold – appropriately raise mold temperature or purposefully increase the local temperature at melt joints, to restrict cooling speed.
②Runner is too thin, narrow or shallow, and cold slug well is too small – increase runner dimensions, improve runner efficiency and at the same time enlarge the area of the cold slug well.
③Increase or reduce the sectional area of the gate, and change gate location. Gate and runner are too small – increase gate size and runner diameter; gate is too far away from the welding area – need to change gate location or add dozzle(s); when deciding gate location, try to keep the melt from flowing around inserts or holes. When jetting occurs, the gate needs to be fixed, relocated or equipped with blocking buffers. Dan, try to avoid the application of multiple gates.
④Insufficient mold venting or no vent at all – set up, expand or clear the vents, including venting through insert and ejection pin clearances, setting up vents in welding areas or increasing vent dimensions.
⑤Too much detergent is used – try not to use release agent.
⑥Plastic part is too thin in the welding area – need to modify mold and thicken the area.
(3)untuk mengeluarkan bahan tambahan yang mempunyai sifat tahan haba yang lebih lemah daripada plastik
① Effective cavity pressure is too low – need to increase injection pressure and injection time.
②Increase injection speed. A high injection speed allows the molten plastic to reach the meeting point before cooling, while a low speed allows sufficient time to let cavity air out.
③Raise melt temperature or nozzle temperature; when the temperature is high, the plastic will feature a low viscosity and good fluidity, thus resulting in slighter weld lines; when the temperature is low, decomposition of gaseous substances can be reduced.
④Try not to use release agents, esp. those containing silicone, or the flows will not be able to bond perfectly.
⑤Reduce clamping force to ensure good ventilation.
⑥Appropriately increase back pressure and adjust screw speed, so as to ensure a uniform melt temperature; increase the screw speed to lower plastic viscosity; increase back pressure to improve plastic density.
(4)untuk mengeluarkan bahan tambahan yang mempunyai sifat tahan haba yang lebih lemah daripada plastik
①Ensure the raw materials are sufficiently dried. Dry the raw materials and try not to use liquid additives.
②Improve fluidity. For plastics that feature poor fluidity or high heat sensitivity, lubricants and stabilizers should be appropriately applied; choose materials with good fluidity and high thermal resistance when necessary.
(5)Product Design
①Small thickness – increase the thickness to avoid premature solidification.
②Inappropriate insert location – make appropriate adjustments.
Mengenai JasonMould Industrial Company Limited
Jasonmould adalah Pembuat acuan China dari acuan plastik- acuan suntikan, acuan pemutus mati, acuan plastik, acuan putaran, perubatan pengacuan suntikan plastik, dua pukulan pengacuan suntikan plastik, masukkan acuan, terlalu banyak, pengacuan suntikan logam, pengacuan suntikan mikro, pengacuan suntikan serbuk, pengacuan suntikan seramik, pengacuan suntikan cecair, acuan suntikan husky, acuan isi rumah, acuan pemutus, alat acuan mati, acuan khas, acuan cina, perkakas prototaip pantas, perkakas prototaip plastik, perkakas penebuk, mati dan perkakas untuk bahagian telefon bimbit / telefon bimbit, bahagian automotif, pembersih vakum, alat yang boleh dicas semula, telefon, mesin penyalin, komputer, pembesar suara multimedia, dan banyak produk elektronik dan perkakas rumah yang lain. Dan juga pengeluar produk plastik, pengeluar acuan China- bahagian plastik, tangki air plastik, bola plastik, bekas plastik, gesper plastik, sauh plastik, penyangkut plastik, sudu plastik, pemasangan paip plastik, plastik jatuh, pinggan mangkuk plastik, cawan plastik, botol plastik, dulang plastik, bekas kosmetik plastik, sarung plastik, bekas makanan plastik, kerusi plastik, penutup plastik, penutup penutup plastik, tiub plastik, paip air plastik, tombol plastik, tiub plastik, kotak utiliti plastik, rak plastik dan sebagainya.
Hubungi:
Orang: James Yuan
Syarikat: JasonMould Industrial Company Limited
Tambah: Kampung LongGang,Bandar LongXi,Daerah BoLuo,Bandar HuiZhou,Wilayah GuangDong, China
Tel: 86-752-6682869
E-mel: [email protected]
Tapak: https://www.jasonmolding.com/company/
