In'ektsion kalıplamaba'zi murakkab qismlarni ommaviy ishlab chiqarishda qo'llaniladigan ishlov berishning bir turi. Maxsus printsipga quyidagilar kiradi: issiqlik bilan eritilgan plastmassaning xom ashyosi plastik kalıpın bo'shlig'iga qarshi kalıplama mashinasi vidası bilan itariladi va plastik shakllantirish mahsulotlari sovutilgan va qattiqlashgandan keyin olinadi.
Plastik qolib ikki qismdan iborat: harakatlanuvchi qolip va sobit qolip. Harakatlanuvchi mog'or qarshi kalıplama mashinasining harakatlanuvchi shabloniga o'rnatiladi va sobit qolip qarshi kalıplama mashinasining sobit shabloniga o'rnatiladi. Inyeksion kalıplama paytida, quyma tizimi va qolib bo'shlig'ini hosil qilish uchun harakatlanadigan qolib va sobit qolib yopiladi. Kalıp ochilganda, plastik mahsulotlarni olish uchun harakatlanadigan qolip va sobit qolip ajratiladi.
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Plastik qolipning tuzilishi plastikning xilma-xilligi va ishlashi, plastik mahsulotlarning shakli va tuzilishi va qarshi mashinasi turiga qarab juda katta farq qilishi mumkin, ammo asosiy tuzilish bir xil.
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1、 According to the function, the structure of plastic mold is mainly composed of pouring system, temperature regulating system, forming parts system, exhaust system, guiding system, ejection system, etc. The pouring system and molding parts are the parts which are in direct contact with the plastics and change with the plastics and products. They are the most complex and changeable parts in the plastic mold, which require the highest processing finish and precision.
1. Pouring system: refers to the flow passage before the plastic enters the mold cavity from the nozzle, including the main flow channel, cold material hole, diversion channel and gate, etc.
2. Forming parts system: it refers to various parts combinations that form the shape of products, including moving die, fixed die, cavity (female die), core (male die), forming rod, etc. The core forms the inner surface of the product, and the cavity (die) forms the outer surface shape of the product. After the mold is closed, the core and cavity form the mold cavity. According to the process and manufacturing requirements, sometimes the core and die are composed of several pieces, sometimes they are made as a whole, and only insert parts that are easy to be damaged and difficult to process are used.
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3. Temperature regulating system: in order to meet the requirements of injection process for mold temperature, a temperature regulating system is required to regulate the mold temperature. For the injection mold for thermoplastic plastics, the cooling system is mainly designed to cool the mold (or heat the mold). The common method of mold cooling is to set up cooling water channel in the mold, and use circulating cooling water to take away the heat of the mold; in addition to using cooling water to pass hot water or hot oil for mold heating, electric heating elements can also be installed inside and around the mold.
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4. Exhaust system: it is set up to discharge the air in the middle cavity and the gas produced by the melting of plastic into the mold during the injection molding process. When the exhaust is not smooth, the product surface will form air marks (air lines), scorch and other defects. The exhaust system of plastic mold is usually a groove shaped air outlet opened in the mold to discharge the air in the original cavity and the gas brought by the molten materials.
