Plastik lutsinar, kerana penghantaran mereka yang tinggi, pasti memerlukan kualiti permukaan yang ketat bagi produk plastik, dan tidak boleh mempunyai sebarang kecacatan seperti tanda, liang pori, pemutihan, halo kabut, Bintik hitam, perubahan warna, kilauan yang lemah, dan lain-lain. Oleh itu, dalam keseluruhan proses pengacuan suntikan, reka bentuk bahan mentah, peralatan, acuan, malah produk harus diberi perhatian dan dikemukakan dengan ketat. Kepada keperluan khas. Kedua, plastik lutsinar kebanyakannya mempunyai takat lebur yang tinggi dan kecairan yang lemah, so in order to ensure the surface quality of products, it is often necessary to have higher temperature, tekanan suntikan, injection speed and other technological parameters should be fine-tuned, so that the injection molding can be full of mold, and will not produce internal stress and cause product deformation and cracking.
Oleh itu, from the raw material preparation, the equipment and mold requirements, injection molding process and product raw material processing must be strictly operated.
1. The preparation and drying of raw materials may affect the transparency of the products because of any impurities in the plastics. Oleh itu, we must pay attention to sealing in the process of storage, transportation and feeding to ensure that the raw materials are clean. Khususnya, water is contained in raw materials, which causes deterioration of raw materials after heating, jadi ia mesti dikeringkan. For injection, the dry hopper must be used. It is also important to note that in the drying process, the input air should be filtered and dehumidified to ensure that the raw materials will not be polluted. The drying process is as follows: drying process of transparent plastics:
2.Cleaning of cylinder, screw and accessories
In order to prevent pollution of raw materials and the existence of used materials or impurities in the hollows of screw and accessories, especially the existence of resin with poor thermal stability, so before use and after shutdown, screw cleaners are used to clean the parts so that no impurities can be adhered to them. Apabila tiada pembersih skru, the screw can be cleaned with PE, PS and other resins. When the temporary shutdown, in order to prevent the raw material staying at high temperature for a long time, causing a drop in dryer and barrel temperature should be reduced, seperti PC, PMMA barrel temperature should be reduced to below 160 degrees Celsius (hopper temperature for PC should be reduced to below 100 degrees Celsius).
3. Dalam reka bentuk acuan, attention should be paid (termasuk reka bentuk produk) In order to prevent backflow obstruction, or uneven cooling resulting in poor plastic molding, surface defects and deformation, in general mold design, should pay attention to the following points:
1) the thickness of the wall should be as uniform as possible and the release angle should be large enough.
2) The transition part should be smooth, and gradually transition, to prevent sharp corners, sharp edges, especially PC products must not have a gap;
3) The gate and runner should be as wide and thick as possible, dan kedudukan gerbang hendaklah ditetapkan mengikut proses pengecutan dan pemeluwapan, and the material well should be cooled if necessary.
4) the surface of the mold should be smooth and low in roughness (well below 0.8).
5)vent hole. Tangki mestilah mencukupi untuk mengeluarkan udara dan gas dalam cair dalam masa.
6)
6) except for PET, ketebalan dinding tidak boleh terlalu nipis, secara amnya tidak kurang daripada LMM.
4. The problems that should be paid attention to in injection molding process (termasuk keperluan mesin pengacuan suntikan) Untuk mengurangkan tekanan dalaman dan kecacatan kualiti permukaan, the following problems should be paid attention to in injection molding process:
1) special screw and injection molding machine with single temperature control nozzle should be selected.
2) the injection temperature should be relatively high when the plastic resin is not decomposed.
3) Tekanan suntikan: generally higher to overcome the defect of high melt viscosity, but too high pressure will produce internal stress and cause difficult demoulding and deformation;
4) Kelajuan suntikan: under the condition of satisfying filling mold, umumnya rendah, good can use slow one fast one slow multi-stage injection;
5)Masa memegang tekanan dan kitaran pengacuan: in order to meet the
requirements of product filling, no hollows, bubbles, hendaklah sesingkat mungkin, in order to minimize the residence time of melt in the barrel;
6) Kelajuan skru dan tekanan belakang: under the premise of meeting the plasticizing quality, should be as low as possible to prevent the possibility of release;
7) Suhu acuan: kualiti penyejukan produk mempunyai kesan yang besar terhadap kualiti, jadi suhu acuan mesti dapat mengawal prosesnya dengan tepat, kalau boleh, suhu acuan harus lebih tinggi.
5. In order to prevent the deterioration of the upper surface quality, the mold release agent should be used as little as possible in general injection molding, and not more than 20% when the recycled material is used.
In addition to PET, the products should be post-processed to eliminate internal stress, PMMA should be 70-80t hot air cycle drying for 4 Jam; PC harus berada di udara bersih, gliserin, liquid paraffin and other heating 110-135 degrees Celsius, masa mengikut produk, high need more than 10 Jam. PET must be subjected to biaxial stretching to obtain good mechanical properties.
JasonMould Industrial Company Limited, ditubuhkan di 2010, adalah pengeluar pengacuan suntikan terkemuka di China. JasonMould pakar dalam pengeluaran acuan plastik untuk perkakas rumah, peralatan perubatan, peralatan elektronik, peralatan keselamatan dan juga sistem pemantauan.
Syarikat telah berakhir 15000 kilang meter persegi. Dengan bahagian alat suntikan plastik yang mempunyai jentera dan kepakaran yang berbeza, JasonMould menawarkan alat dari bahagian telefon bimbit kecil dan tepat hingga bahagian automotif. Alat kami terutama dieksport ke A.S., Eropah, Jepun dan UK. Strategi kepelbagaian dan perkhidmatan penuh JasonMould telah mendapat pujian daripada pelanggan di seluruh dunia.
Misi kami adalah untuk menyediakan produk dan perkhidmatan pengacuan berkualiti tinggi kepada pelanggan kami. Kami berhasrat untuk melebihi jangkaan harga pelanggan, kualiti dan penghantaran tepat pada masanya. Untuk mencapai misi kita, JasonMould:
Commits to continually improve employee skills and efficiency,
Provides our employees a clean and safe working environment,
Upgrades machine technology and support equipment through a strict maintenance program, dan
Maintains customers’ tooling to its highest peak of performance
Untuk lebih lanjut mengenai pengeluar produk plastik acuan khas,sila layari https://www.jasonmolding.com/
Hubungi Pertanyaan:
Hubungi orang: James Yuan
Nama syarikat: JasonMould Industrial Company Limited
Alamat: Kampung LongGang,Bandar LongXi,Daerah BoLuo,Bandar HuiZhou,Wilayah GuangDong, China
Telefon: 86-752-6682869
E-mel: [email protected]
Laman web: https://www.jasonmolding.com
