Biz yangi to'plamni olsakqoliplartekshiruv va sinovdan o'tishga muhtoj bo'lgan holda, biz har doim natijani oldinroq sinab ko'rishga va ish vaqtini behuda sarflamaslik va muammolarga olib kelmaslik uchun yumshoq jarayon haqida ibodat qilishga tayyormiz.
& nbsp;
Ammo bu erda biz ikkita narsani eslatishimiz kerak:
Birinchidan, mog'or dizayneri va ishlab chiqarish bo'yicha mutaxassislar ba'zan xato qilishadi. Agar biz modellarni sinab ko'rishda hushyor bo'lmasak, kichik xatolar tufayli katta zarar etkazishimiz mumkin.
& nbsp;
Second, the result of the model test is to ensure the smooth production in the future. & nbsp; If reasonable steps are not followed and proper records are not made in the mold test process, the smooth progress of mass production cannot be guaranteed. & nbsp; What we emphasize more is that & quot;if the mould is used smoothly, the profit recovery will be increased rapidly, otherwise the cost loss will be more than the cost of the mould itself & quot;.
& nbsp;
II. Model testidan oldin qilingan ehtiyot choralari
1. Understand the relevant information of the mold:
Mog'orning dizayn rasmini olish, uni batafsil tahlil qilish va qolib sinovida qatnashish uchun mog'or bo'yicha mutaxassisni olish yaxshiroqdir.
& nbsp;
2. First check its mechanical cooperation on the workbench:
Attention should be paid to scratch, missing parts, looseness and other phenomena, whether the movement of the die to the sliding plate is true, whether there is leakage in the water channel and air pipe joint, and whether the opening of the die is limited should also be marked on the die. & nbsp; If the above actions can be done before the die is hung, the waste of working hours caused by finding problems when the die is hung and disassembling the die can be avoided.
& nbsp;
3. When it is determined that all parts of the mold are acting properly, it is necessary to select a suitable test injection machine. Attention should be paid to: (a) injection capacity; & nbsp; (b) the width of the guide rod; & nbsp; (c) maximum opening distance; & nbsp; (d) accessories; & nbsp; Whether it is complete, etc. & nbsp; After everything is confirmed that there is no problem, the next step is to hang the mold. During hanging, care should be taken not to take it off before locking all the clamping plates and opening the mold, so as not to loosen or break the clamping plates and cause the mold to fall off.
& nbsp;
Kalıp o'rnatilgandan so'ng, slayd plitasi, kırrak, tish chiqarish tuzilishi va chegara almashtirish kabi har bir qismning mexanik harakatlarining to'g'riligini tekshiring. & nbsp; Va in'ektsion ko'krakning besleme rozetkasiga mos kelishiga e'tibor bering. & nbsp; Keyingi qadam mog'orni yopish harakatlariga e'tibor berishdir. Bu vaqtda mog'orni yopish bosimini pasaytirish kerak. Qo'l bilan va past - tezkor mog'orni yopish harakatlarida, notekis harakatlar va g'ayritabiiy tovushlar bor-yo'qligini ko'rish va eshitish kerak.
& nbsp;
4. Raise mold temperature:
Tayyor mahsulotda ishlatiladigan xom ashyoning ishlashi va qolib hajmiga ko'ra, ishlab chiqarish jarayonida qolib haroratini kerakli haroratga ko'tarish uchun tegishli qolib haroratini sozlash moslamasi tanlanadi.
& nbsp;
Kalıp harorati ko'tarilgach, barcha qismlarning harakatlarini yana bir bor tekshirish kerak, chunki po'lat termal kengayish tufayli mog'or yopishishiga olib kelishi mumkin, shuning uchun barcha qismlarning toymasinligiga tebranish va tebranishning oldini olish uchun e'tibor berish kerak.
& nbsp;
5. If there is no experimental planning rule in the factory, we suggest that only one condition can be adjusted at a time when adjusting the test conditions, so as to distinguish the influence of single condition change on the finished product.
& nbsp;
6. According to the different raw materials, bake the raw materials properly.
& nbsp;
7. Try to use the same raw materials as possible for future mass production.
& nbsp;
8. Do not try the mold completely with inferior materials. If you have color requirements, you can arrange the color test together.
& nbsp;
9. Internal stress and other problems often affect the secondary processing. After the finished product is stable after the test, the secondary processing mold shall be closed slowly. The mold closing pressure shall be adjusted and operated several times to check whether there is any phenomenon such as uneven mold closing pressure to avoid burrs and mold deformation of the finished product.
& nbsp;
Yuqoridagi amallar tekshirilgandan so'ng, qolipni yopish tezligi va bosimi pasaytiriladi, xavfsizlik tugmasi va chiqarish zangi o'rnatiladi va shundan so'ng normal qolib yopish va yopish tezligi sozlanadi. & nbsp; Maksimal konturni chegaralash tugmachasi bo'lsa, qolib ochish konturini biroz qisqartirish kerak va yuqori - tezkor qolib ochish harakati qolib ochilishining maksimal darajasigacha kesilishi kerak. & nbsp; Buning sababi shundaki, yuqori - tezlikda harakatlanish mog'orni to'ldirish paytida mog'or ochilishining past darajasidan past - tezligidan uzunroqdir. & nbsp; Plastik mashinadagi mexanik chiqarib olish moslamasi, shuningdek, ejektor pin plastinkasini yoki strelkalarning siqilish sababli deformatsiyalanishini oldini olish uchun to'liq - tezkor qolib ochish harakatlaridan so'ng harakatga keltirilishi kerak.
& nbsp;
Birinchi mog'orni quyishdan oldin yana quyidagi narsalarni tekshiring:
& nbsp;
(a) Zaryadlovchi kontur juda uzunmi yoki etarli emasmi.
(b) Bosim juda yuqori yoki juda past bo'ladimi.
(c) to'ldirish tezligi juda tezmi yoki juda sekinmi.
(d) ishlov berish tsikli juda uzun yoki juda qisqa bo'ladimi.
& nbsp;
Qisqa zarbani, sinishni, deformatsiyani, burmalarni va hatto tayyor mahsulot qolipini shikastlamaslik uchun.
& nbsp;
If the processing cycle is too short, the thimble will push through the finished product or peel the ring and crush the finished product. & nbsp; This kind of situation may take you two or three hours to take out the finished product.
& nbsp;
Agar ishlov berish aylanishi juda uzoq bo'lsa, kauchuk birikmaning qisqarishi tufayli qolib yadrosining ingichka qismi buzilishi mumkin.
& nbsp;
Of course, you can & #39;t predict all the problems that may occur during the mold test, but full consideration and timely measures in advance will help you avoid serious and expensive losses.
& nbsp;
Uchinchisi, model sinovining asosiy bosqichlari
& nbsp;
Ommaviy ishlab chiqarishda keraksiz vaqtni yo'qotish va muammolarni oldini olish uchun, har xil qayta ishlash sharoitlarini sozlash va nazorat qilish, harorat va bosimning eng yaxshi sharoitlarini aniqlash va standart qoliplarni sinovdan o'tkazish tartib-qoidalarini tuzish uchun sabr-toqat talab etiladi. kunlik ish usullarini o'rnatish.
& nbsp;
& nbsp;
& nbsp;
1. Check whether the plastic material in the charging barrel is correct and whether it is baked according to regulations (different results are likely to be obtained if different raw materials are used for mold test and production).
& nbsp;
※. & nbsp; Test whether the temperature of the material pipe and the temperature of the mold are suitable for the processed raw materials.
& nbsp;
3. Adjust the pressure and injection quantity in order to produce a finished product with satisfactory appearance, but do not run burrs, especially when some cavity finished products are not completely solidified. Before adjusting various control conditions, you should think about it, because a slight change in mold filling rate may cause great mold filling changes.
& nbsp;
4. Mashina sharoitlari va qolib barqarorlashguncha sabr-toqat bilan kuting, hatto o'rta - o'lchamdagi mashinalarda ham 30 daqiqadan ko'proq vaqt ketishi mumkin. & nbsp; Ushbu vaqt oralig'i tayyor mahsulot bilan bog'liq muammolarni tekshirish uchun ishlatilishi mumkin.
& nbsp;
5. The advancing time of the screw cannot be shorter than the solidification time of the gate plastic, otherwise the weight of the finished product will be reduced and the performance of the finished product will be damaged. & nbsp; And when the mold is heated, the advance time of the screw also needs to be lengthened to compact the finished product.
& nbsp;
6. Reasonable adjustment to reduce the total processing cycle.
& nbsp;
7. Yangi uzatilgan sharoitlarni barqaror bo'lgunga qadar kamida 30 daqiqa davomida ishlating, so'ngra kamida o'nlab to'liq naqshli mahsulotlarni ishlab chiqaring, konteynerlarda sana va miqdorni belgilang va mog'or bo'shlig'iga qarab alohida-alohida joylashtiring, shunda ular sinab ko'riladi. ularning haqiqiy ishlashining barqarorligi va oqilona boshqarish toleranslarini olish. & nbsp; (ayniqsa, ko'p - bo'shliq mog'orlari uchun qimmatlidir).
& nbsp;
8. Measure and record the important dimensions of continuous samples (measure again when the samples are cooled to room temperature).
& nbsp;
9. When comparing the measured sizes of each pattern, attention should be paid to:
(a) o'lchamining barqarorligi.
(b) Ba'zi o'lchamlarning o'sish yoki pasayish tendentsiyasi mavjudmi, bu ishlov berish sharoitlari o'zgarib borayotganligini ko'rsatmoqda, masalan, haroratni pasaytirish yoki yog 'bosimini boshqarish.
(c) o'lchovli o'zgarish tolerantlik chegarasida bo'ladimi.
& nbsp;
10. If the size of the finished product is not changed and the processing conditions are normal, it is necessary to observe whether the quality of the finished product of each mold cavity is acceptable and its size is within the allowable tolerance. & nbsp; Record the number of the measured cavities that are continuous, larger or smaller than the average value so as to check whether the size of the mold is correct.
& nbsp;
& nbsp;
Mog'or va ishlab chiqarish sharoitlarini o'zgartirish zarurati va kelajakda ommaviy ishlab chiqarish uchun ma'lumot sifatida ma'lumotlarni yozib oling va tahlil qiling.
& nbsp;
1. Make the processing run longer to stabilize the melt temperature and hydraulic oil temperature.
& nbsp;
2. Adjust the machine conditions according to the size of all finished products that are too large or too small. If the shrinkage rate is too large and the finished products appear insufficient in shot materials, reference can also be made to increase the gate size.
& nbsp;
3. The size of each mold cavity is too large or too small to be corrected. If the size of the mold cavity and the door are still correct, then the machine conditions, such as mold filling rate, mold temperature and pressure of each part, should be changed and whether some mold cavities are filling slowly should be checked.
& nbsp;
4. according to the matching situation of the finished products of each mold cavity or the mold core displacement, the mold filling rate and mold temperature may be adjusted again to improve its uniformity.
& nbsp;
5. Check and modify the faults of the injection machine, such as the defects of oil pump, oil valve, temperature controller, etc., which will cause changes in processing conditions. Even the perfect mold cannot exert good working efficiency in poorly maintained machines.
& nbsp;
Yozib olingan barcha qiymatlarni ko'rib chiqqandan so'ng, tuzatilgan namunalarning yaxshilanganligini tekshirish va taqqoslash uchun namunalar to'plamini saqlang.
& nbsp;
IV. Muhim masalalar
Kalıp sinov jarayonida namunaviy tekshiruvning barcha yozuvlarini, shu jumladan ishlov berish davridagi turli bosimlarni, eritilgan elim va qolib harorati, material quvurlari harorati, in'ektsiya ta'sir qilish vaqti, vintlardek oziqlantirish davri va hokazolarni to'g'ri saqlang. Qisqasi, bu sizga yordam beradigan barcha ma'lumotlar. kelajakda sifat standartlariga javob beradigan mahsulotni olish uchun bir xil qayta ishlash sharoitlarini muvaffaqiyatli o'rnatish kerak.
& nbsp;
Hozirgi vaqtda mog'or harorati odatda zavod mog'or sinovida e'tiborga olinmaydi va qisqa - muddatli mog'or sinovi va kelajakda ommaviy ishlab chiqarish paytida qolib haroratini o'rganish juda qiyin. Noto'g'ri mog'or harorati namuna hajmiga, yorqinligiga, qisqarishiga, oqimning pasayishiga va material tanqisligiga ta'sir qilishi mumkin va hokazo. Agar qolib haroratni boshqarish moslamasi ishlatilmasa, kelajakda ommaviy ishlab chiqarish uchun qolib haroratini tushunish qiyin bo'lishi mumkin.
