Dalam cetakan injeksi kami, karena berbagai faktor, kita sering melihat beberapa retakan yang tidak nyaman setelah dicetak, yang sering membuat kita pusing. Jadi hari ini, mari kita bicara tentang bagaimana menangani retak bagian plastik.
Retak termasuk retak berserabut, microcracks, atasan putih, retak permukaan bagian, atau krisis trauma yang disebabkan oleh bagian yang menempel dan saluran aliran. Menurut waktu retak yang berbeda, cracking dapat dibagi menjadi cracking demoulding dan cracking aplikasi. Ada tiga alasan utama
Alasan pemrosesan:
(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) Ejeksi 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) Mengeluarkan harus seimbang, 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, sehingga mudah untuk dicetak ulang.
(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.
Tentang JasonMould Industrial Company Limited
Jasonmould adalah pembuat cetakan Cina dari cetakan plastik- cetakan injeksi, cetakan die casting, cetakan tiup plastik, cetakan rotasi, medis cetakan injeksi plastik, dua tembakan cetakan injeksi plastik, masukkan cetakan, overmolding, cetakan injeksi logam, cetakan injeksi mikro, cetakan injeksi bubuk, cetakan injeksi keramik, cetakan injeksi cair, cetakan injeksi husky, cetakan rumah tangga, pengecoran cetakan, alat cetakan mati, cetakan khusus, cetakan cina, perkakas prototipe cepat rapid, perkakas prototipe plastik plastic, perkakas tekan pukulan, mati dan perkakas untuk bagian ponsel / ponsel cell, bagian otomotif, penyedot debu, alat isi ulang, telepon, mesin fotokopi, komputer, speaker multimedia, dan banyak produk elektronik dan peralatan rumah tangga lainnya. Dan juga produsen produk plastik, produsen cetakan Cina- bagian-bagian yang terbuat dari plastik, tangki air plastik, bola plastik, wadah plastik, gesper plastik, jangkar plastik, gantungan plastik, sendok plastik, pemasangan pipa plastik, gelas plastik, peralatan makan plastik, gelas plastik, botol-botol plastik, nampan plastik, wadah kosmetik plastik, kotak plastik, wadah makanan plastik, kursi plastik, tutup plastik, penutupan tutup plastik, tabung plastik, pipa air plastik, kenop plastik, tabung plastik, kotak utilitas plastik, rak plastik dan sebagainya.
Kontak:
Orang: James Yuan
Perusahaan: JasonMould Industrial Company Limited
Menambahkan: Desa LongGang,Kota LongXi,Kabupaten BoLuo,Kota HuiZhou,Provinsi Guangdong, Cina
Telp: 86-752-6682869
Surel: [email protected]
Situs: https://www.jasonmolding.com/custom-injection-molding/
