Dalam acuan suntikan kami, kerana pelbagai faktor, kita sering melihat keretakan yang tidak selesa setelah dibentuk, yang sering membuat kita berasa sakit kepala. Jadi hari ini, mari kita bincangkan bagaimana menangani keretakan bahagian plastik.
Keretakan merangkumi retakan filamen, mikrokrak, bahagian atas putih, retak permukaan bahagian, atau krisis trauma yang disebabkan oleh bahagian melekat dan saluran aliran. Mengikut masa retak yang berbeza, keretakan boleh dibahagikan kepada keretakan demoulding dan retak aplikasi. Terdapat tiga sebab utama
Memproses sebab:
(1) If the processing pressure is too high, the speed is too fast, the more materials are filled, and the injection and holding time is too long, the internal stress will be too large and cracks will be produced.
(2) Adjust the opening speed and pressure to prevent parts from cracking due to rapid and strong drawing.
(3) Adjust the mold temperature properly to make the parts easy to demould; adjust the material temperature properly to prevent decomposition.
(4) To prevent low mechanical strength and cracking caused by weld and plastic deterioration.
(5) Proper use of mold release agent, pay attention to eliminate water mist and other substances attached to the mold surface.
(6) After forming, the parts are annealed immediately to eliminate residual stress and reduce cracks.
Mold reason:
(1) Pelepasan harus seimbang. Sebagai contoh, the number and cross-sectional area of ejector pins should be sufficient, the demoulding slope should be large enough, and the cavity surface should be smooth enough to prevent cracking caused by residual stress concentration caused by external force.
(2) Struktur bahagian tidak boleh terlalu nipis, and the transition part should adopt arc transition as far as possible to avoid stress concentration caused by sharp corners and chamfers.
(3) Try to use less metal inserts to prevent the increase of internal stress due to the different shrinkage rate of inserts and products.
(4) For deep bottom parts, appropriate demoulding air inlet pipe should be set to prevent the formation of vacuum negative pressure.
(5) The sprue is sufficient to demould before curing, jadi ia mudah untuk dirobohkan.
(6) When the gate sleeve is connected with the nozzle, the cold and hard materials should be prevented from dragging the workpiece onto the fixed die.
Material reason:
(1) The high content of recycled materials leads to low strength of parts.
(2) Too high humidity causes some plastics to react with steam, reducing strength and cracking.
That’s all for today. Please pay attention to us and learn more about injection molding.
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/custom-injection-molding/
