Getah konsisten yang tinggi (HCR) or Heat Cured Rubber (HCR) is an injection molding technique used to create equipment with high consistency polymeric silicone that is resilient and elastic.
The Strong Consistency Rubber (HCR) is a flow plate with a high resistance to flow and little elasticization. Getah konsisten yang tinggi (HCR) is suitable for tough environmental circumstances because it has excellent shock absorption, heat and cold resistance, and electrical conductivity.
What is High Consistency Rubber（HCR）？
Getah silikon pepejal (kadang-kadang disebut sebagai getah silikon konsisten tinggi, atau HCR), yang disembuhkan pada suhu tinggi menggunakan peroksida organik atau pemangkin platinum. HCR mempunyai konsistensi yang kukuh kerana ia terdiri daripada rantai polimer panjang dengan berat molekul yang tinggi. HCR digunakan dalam pelbagai aplikasi statik dan dinamik kerana kualiti mekanikalnya yang luar biasa, termasuk:
- Automotif
- Aeroangkasa
- Penghantaran dan pengedaran elektrik
- Wayar dan kabel
- Pemprosesan makanan
- Barang getah yang dibentuk
Penuaan dan rintangan suhu yang sangat baik disediakan oleh HCR. Teknik konvensional termasuk penyemperitan, Kaling, mampatan, dan pencetakan suntikan boleh digunakan untuk memprosesnya.
The HCR Injection Molding Process
Solid silicone rubber is produced in bulk by rubber producers, who combine the ingredients in an uniform mixture at high temperatures. The curing process is facilitated by the inclusion of peroxide catalyst. Fabricators start the cross-linking of the molecules, but roll out the sheets of rubber materials before the vulcanization process is finished for storage or transportation.
The actual silicone rubber manufacturing process entails six steps:
- Pemangkin dan melembutkan kilang
Proses awal ini membalikkan "Crepe Hardening" yang berlaku akibat bahan yang disimpan di pembekal atau fabrikasi dan diperlukan untuk kedua -dua aplikasi penyemperitan dan pencetakan. Selain itu, some procedures employ milling to combine the two components of an extra cure elastomer before processing or to add peroxide catalysts as needed to a free radical elastomer. A two-roll mill is required for this time-consuming procedure since the elastomer must go through the mill more than once to combine the complex material into a homogenous final result. The sheet might need to be processed further once it has been taken out of the mold.
- Membina preform
The preparation of a performance comes next, which entails a lot of work, especially in high-volume production settings that run continuously. Palam yang sesuai dengan takungan pemindahan akhbar pemindahan mesti dipotong dari preform oleh pemotong mati sebagai sebahagian daripada prosedur pengacuan pemindahan. Due to the requirement that the preform be cut into the same shape as the finished component, the compression molding application involves a more involved procedure. The elastomer sheet is cut into strips and fed into the extruder to prepare the preform for the extrusion and injection molding applications.
- Penyemperitan
Extruder satu skru digunakan dalam akhbar penyemperitan untuk HCR. Roda suapan roller digunakan oleh pengendali untuk memberi jalur pasang siap ke dalam extruder. The elastomer material is extruded through a die and mandrel assembly, which equips the extruder with a crosshead assembly to form the required profile. The "support extrude" processing option uses a crosshead assembly that is mounted on the extruder to pass the supporting geometry through it and extrude a layer of silicone rubber over it.
- Membentuk
Alat acuan yang berbeza diperlukan untuk pelbagai aplikasi silikon konsisten tinggi. Personnel are needed to load the elastomer into the machinery and to de-mold the completed components during both transfer and injection molding manufacture. In order to complete the compression molding process, employees must insert preforms into each mold's cavity. Due to the long cure cycles of high consistency rubber, the molds may have several holes.
- VULCANIZATION
Extruded goods are vulcanized by fabricators using hot-air vulcanizing ovens (HAVs). By creating molecular cross-links, this process makes the material stronger and more resilient. Profil yang diekstrusi ditarik melalui ketuhar di dalam ketuhar menegak, yang terdapat dalam kedua -dua varian menegak dan mendatar. Radiant heat or a steam autoclave oven are used in some vulcanization procedures.
- Finishing
The application determines how much finishing is done. The finishing procedure for extrusion profiles involves a visual examination and cutting the tubes into predetermined lengths. The profile has to go through a post-cured procedure to get rid of the peroxide byproducts for extrusion components that are peroxide cured. Trimming or de-flashing of molded components is another step in the injection molding process. The employee cuts the components off the huge, molded sheet using a die-cutting tool. The component can need post-curing in specific circumstances.
Material is wasted during the production of high-consistency rubber, and labor is expensive. Selain itu, physical labor and other tools and equipment are needed. Namun begitu, the equipment is less costly than the molds needed to make items made of LSR (getah silikon cecair).
Bilakah getah konsistensi tinggi (HCR) Pilihan terbaik?
Getah konsisten yang tinggi (HCR) Pencetakan suntikan sering menjadi kaedah pilihan ketika menghasilkan peralatan dan bahagian bahan untuk automotif, elektrik, Biomedikal, dan industri farmaseutikal. Getah konsisten yang tinggi (HCR) mempamerkan rintangan tinggi terhadap suhu, adalah penyerap kejutan yang sangat baik, dan merupakan konduktor elektrik yang baik.
Getah konsisten yang tinggi (HCR) adalah pilihan terbaik untuk fabrikasi kabel, Boots Plug Spark, penebat elektrik, tiub, peralatan penerbangan, dan peralatan tertutup lain kerana rintangan haba yang kuat, Rintangan Kebakaran, dan pelepasan asap rendah.
Because the procedure isn't adaptable enough for automated replication needed for mass production runs, getah konsistensi yang tinggi (HCR) Kaedah pengacuan adalah pilihan terbaik dalam kes pembuatan besar.