Momwe mungafupitsire jakisoni wowumba wa jakisoni ku Makina a jakisoni aku China?

Momwe mungafupitsire jakisoni wowumba wa jakisoni ku Makina a jakisoni aku China?

M'gulu lamalonda lomwe likukulirakulirabe, Kuwongolera kachulukidwe kazinthu ndi nkhani yofunika kuiganizira. Nkhaniyi ikufotokoza njira zosiyanasiyana zowonjezerera jekeseni pogwiritsa ntchito zomwe zilipo kale kapena zatsopano makina opangira jakisoni wa China kapena nkhungu

Jekeseni kuzungulira

The jakisoni kuzungulira makina opangira jekeseni a hydraulically amatanthawuza kuyamba kwa nkhungu kumangirira ku nkhungu yotsatira.. Kuthirira nkhungu nthawi zambiri kumagawidwa m'magawo anayi: kudya nkhungu clamping, kuchepetsa nkhungu clamping, otsika kuthamanga nkhungu chitetezo ndi mkulu kuthamanga nkhungu clamping.

Jekeseniyo imayamba pambuyo pomaliza kukakamiza kwambiri, ndipo imagawidwanso m'magawo angapo. Pulasitiki yosungunuka imadzaza m'bowo panthawi yobaya. Pamene patsekeke wadzazidwa, kupsyinjika kumakwera kwambiri, kotero mapeto a jekeseni amatchedwanso gawo lonyamula.

Pamene kulamulira sikuli koyenera, mankhwala omalizidwa adzakhala ndi burrs.Kukakamiza kugwira kumayamba jekeseni ikatha. Pamenepo, kuzizirira kumayamba pambuyo podzaza patsekeke, ndiye, imayamba kuchokera kukakamiza kugwira. Pamene nkhungu ikazizira, mankhwala omalizidwa amachepa pansi pa kuzizira.

Ntchito yogwira kukakamiza ndikudutsa wothamanga wozizira yemwe sanakhazikikebe, ndikudzaza zopuma zomwe zimapangidwa ndi shrinkage pamphamvu yogwira yomwe imakhala yotsika kuposa kuthamanga kwa jekeseni, kotero kuti mankhwala omalizidwa adzaza (opanda mano) ikagwetsedwa.

Pamene wothamanga ozizira ali olimba, sikuli tanthauzo kukakamizanso, ndipo kupanikizika kungathe kuthetsedwa. Kupanikizika kogwira kumatha kugawidwa m'magawo angapo, ndipo kukakamizidwa kwa gawo lililonse kumakhala kosiyana (kawirikawiri kuchepa sitepe ndi sitepe), zomwe zimagawidwa ndi nthawi. Nthawi yonse yogwira imatsimikiziridwa ndi kulemera kwa chinthu chomalizidwa kapena kusakhalapo kwa mano pa chinthu chomalizidwa. Sinthani kuchokera pakanthawi kochepa, ndi kuwonjezera nthawi yogwira jekeseni iliyonse, mpaka kulemera kwa mankhwala omalizidwa sikukuwonjezekanso kapena madontho akuvomerezedwa, nthawi yogwira sikuyenera kuwonjezeredwa.

The “nthawi yozizira” parameter yomwe imayikidwa pa makina opangira jekeseni wa China ndi nthawi yanthawi kuchokera kumapeto kwa kukakamiza mpaka kutsegula kwa nkhungu., koma kuziziritsa kumayamba pomwe nkhungu imadzaza ndi pulasitiki. Cholinga cha “nthawi yozizira” ndikupangitsa kuti chinthu chomalizidwacho chipitirire kuziziritsa ndi kulimba kuti zisawonongeke ndi jekeseni akabayidwa.. Ziyenera kunenedwa kuti “nthawi yozizira” amachokera ku kuyesa.

Clamping

Makina opangira jekeseni amtundu wa China omwe angopangidwa kumene apanganso makina omangira mafuta kuti athe kuyesetsa kuthamanga kwambiri.. Ndikoyenera kugwiritsidwa ntchito poganizira kuti nkhunguyo siimakhudzidwa kwambiri. ,

High kuthamanga nkhungu clamping

Kugwiritsa ntchito mphamvu yochepetsetsa kwambiri yomwe ingalepheretse chinthu chomalizidwa kupanga ma burrs kumatha kufupikitsa nthawi yofunikira pagawo lolimba kwambiri.. Komanso, ndodo zomangira, toggles, ndi ma templates a nkhungu, China china jekeseni makina akamaumba, ndipo ma templates adzatalikitsanso moyo wawo chifukwa chogwiritsa ntchito mphamvu yochepetsera.

Ngati nkhungu yokhala ndi clamping force ya 50t ndiyokwanira, palibe chifukwa chogwiritsa ntchito clamping force ya 51t, ngakhale makina anu opangira jakisoni aku China ali ndi mphamvu yopumira kwambiri.

jekeseni

Kuthamanga kwambiri kwa jakisoni kumatha kugwiritsidwa ntchito ngati chomaliza sichitulutsa thovu kapena mawanga akuda chifukwa cha pulasitiki yoyaka.. Makamaka akamaumba jekeseni wa mipanda yokhuthala, kuchuluka kwa malo osungiramo mpweya mu nkhungu kumadzaza ndi pulasitiki yosungunuka. Kuthamanga kwambiri kwa jakisoni kumalepheretsa mpweya wapabowo kuti usatuluke mu nkhungu, kuchititsa thovu.

Kugwiritsa ntchito jekeseni yotsika kwambiri kungathenso kuchepetsa mphamvu ya clamping yofunikira (mphamvu yowonjezera), pamene ntchito otsika mbiya kutentha akhoza kufupikitsa “nthawi yozizira”.

Gwirani kukakamiza

Nthawi yaifupi kwambiri yogwira imatha kuzindikirika kuchokera kulemera kwa chinthu chomalizidwa kapena chiboliboli chovomerezeka. Pali zinthu zambiri zokhala ndi mipanda yopyapyala zomwe sizifunikira kukakamiza, chifukwa chosanjikiza chamkati cha mankhwala omalizidwa chimakhazikika nthawi yomweyo jekeseni ikamalizidwa.

Nthawi yozizira

Pali mawu akuti: Chikombolecho kwenikweni ndi chosinthanitsa kutentha. Inde, nkhungu mosalekeza imachotsa kutentha kwa kusungunuka kudzera mumtsinje wamadzi ozizira, ndi nkhungu yopangidwa bwino imatha kupititsa patsogolo kusinthanitsa kutentha. Komabe, ngati aloledwa, Kuzizira kwa madzi oundana kumatha kufupikitsa “nthawi yozizira”. Ngati madzi ayezi utakhazikika kuti nkhungu condensation, chowuzira mpweya wowuma ndi chotchinga chotchinga nkhungu zimatha kuchepetsa kuchuluka kwa mame ndikuletsa kukhazikika..

Ngati plasticizing mphamvu sikokwanira ndipo amakhala botolo, mankhwala otsatirawa angathe kuchitika pa wononga kamangidwe ndi chizindikiro kusintha:

1. Zotchinga zowononga zimatha kuwonjezera mphamvu ya plasticizing.
2. Kukula kwakukulu (C) screw ikhoza kuonjezera mphamvu ya plasticizing.
3. Kuchulukitsa kuzama kwa zomangira kungathe kuwonjezera mphamvu ya plasticizing.
4. Kuwonjezeka kwa liwiro la screw kungawonjezere mphamvu ya plasticizing (mapulasitiki ena omwe amamva kumeta ubweya, monga pvc, PET, etc., sangagwiritse ntchito njirayi).
5. Chepetsani kukakamiza kumbuyo momwe mungathere, mwinamwake izo zidzawonjezera liwiro la plasticizing.
6. The hydraulic sealing nozzle imatengedwa, kotero kuti jekeseni nkhungu ikhoza kukhala pulasitiki potsegula ndi kutseka nkhungu ya jekeseni.
7. Kugwiritsa ntchito mapangidwe a pre-plasticizer kumathandizira kuti wonongazo zikhale zapulasitiki panthawi yozungulira kupatula jekeseni ndi nthawi yogwira..
8. Adopt-pressure-holding device, kotero kuti screw ikhoza kupangidwa ndi pulasitiki mu gawo logwira ntchito.

Gwiritsani ntchito liwiro lapamwamba kwambiri kuti mutsegule nkhungu ya jakisoni osang'amba zomwe zamalizidwa ndikupanga phokoso lalikulu lotsegulira jekeseni.. Makina ena apamwamba kwambiri opangira jakisoni aku China ali ndi zida za decompression asanatsegule nkhungu, ndipo ngakhale kutsegula nkhungu yothamanga kwambiri sikudzatulutsa phokoso. Kuti mukwaniritse malo oyimira jekeseni ya nkhungu pansi pa kutsegulidwa kwa nkhungu yothamanga kwambiri, valavu ya brake kapena control-loop control ingagwiritsidwe ntchito.

Pa makina ang'onoang'ono a jakisoni aku China opangira jakisoni okhala ndi mphamvu yochepa yotulutsa, Pneumatic ejection angagwiritsidwe ntchito, womwe ndi wapamwamba kuposa liwiro la hydraulic ejection. Kutulutsa kwamagetsi kumathamanga kwambiri kuposa kutulutsa mpweya.

jekeseni jekeseni akhoza kupangidwa kuti atulutsidwe ndi jekeseni nkhungu kutsegula kanthu m'malo mwa ejection chipangizo pa jekeseni china china jekeseni akamaumba makina.. Njira iyi ikhoza kutulutsidwa kamodzi kokha. Iyi ndi njira yosavuta yotulutsira pamene mukutsegula nkhungu ya jekeseni.

Kugwiritsa ntchito mafuta ozungulira ozungulira, kayendedwe ka gasi kapena kuwongolera dera, imatha kuzindikira ntchito ya ejection angapo potsegula nkhungu ya jekeseni potulutsa. Kuti

Zokhala ndi zida zamakanema ndi makompyuta, imatha kusanthula mwachangu ngati zinthu zomalizidwa zonse zidatsitsidwa pambuyo pa ejection imodzi. Ejection yachiwiri imachitika pamene si onse omwe amagwetsedwa, choncho 99% of the cycles in the above example are ejected only once, which saves the average cycle time.

Retreat

Some finished products can be ejected by the vibration of the injection china china injection molding machine for multiple ejections. The thimble does not need to be fully retracted each time to shorten the time of multiple ejections.

The last ejection can start at the same time as the injection mold clamping. Since the stroke of the thimble is shorter than that of the template, the thimble will always be fully retracted before the injection mold is locked.

The shortest cycle time

The shortest cycle time consists of the time required for injection mold clamping, jekeseni, pressure holding, cooling and injection mold opening. Feeding is carried out at the same time during the “nthawi yozizira” and injection mold opening and closing, and even while maintaining pressure. Multiple ejections are performed at the same time when the injection mold is opened, and the last ejection is performed at the same time when the injection mold is closed. Pamenepa, up to three actions can be performed at the same time, and each action has an independent drive. It may be that all three are oil circuits (such as three oil pumps), and all three are circuits (electric china china injection molding machine) or a combination of oil circuits, air circuits and circuits.

Electric china china injection molding machines generally have 4 servo motors to drive injection molding, feeding, opening, closing and demolding respectively. The advantage is that the parallel operation can shorten the cycle. Pamenepo, the hydraulic china china injection molding machine can also achieve this goal when using 3 independent oil circuits. Chifukwa chake, this advantage is not a patent for electric china china injection molding machines.

Since injection cannot be made when the mold is opened, the four servo motors cannot operate at the same time. The analysis in Figure 10 shows that the three parallel actions have reached the shortest period.

Dry run time

Many china china injection molding machine specifications indicate the dry running time, but generally it is only calculated theoretical time, ignoring the acceleration and deceleration of the template, and of course the quality of the moving mold is not calculated, which is shorter than the actual mold opening and closing time. . According to Euromap’s standard, the idle running time is the time required for the template to open and close, and the opening and closing stroke is set at 0.7 times the four-column space. In the shortest cycle, only mold opening and closing time (idle running time) and injection time are related to the design of the china china injection molding machine.

Thin wall injection

Thin-wall injection molding is defined as injection molding with a wall thickness of 0.5 mm or less, or a process/wall thickness ratio of 300 kapena kuposa. In order to prevent the molten plastic from solidifying before filling the cavity, thin-wall injection molding is high-speed (and high acceleration/deceleration) jekeseni akamaumba. The so-called high-speed injection molding means that the forward speed of the screw is above 300 mm/s. Under high-speed injection molding, the injection time is generally within 0.5s. High-speed injection is assisted by accumulators. The oil pump fills the accumulator during the “nthawi yozizira”, or a small oil pump can be used to fill the accumulator during times other than injection and pressure holding. The stored high-pressure oil is released during injection, which can generally increase the injection speed by 3 nthawi.

Blow demoulding

If the product can be demolded by blowing, it is easy to blow while opening the mold. Nthawi zambiri, the air blowing is delayed after the mold is opened to hide the demolding time in the mold opening time.

Pneumatic demolding

Pneumatic ejection is realized on a small china china injection molding machine that requires little ejection force, so that mold opening and closing are parallel to ejection and ejection, which saves about 1s of ejector action time, which is considerable on small china china injection molding machines. , And finally reached a cycle time of 2s.

Second best

The cost of an china china injection molding machine with three independent oil circuits is relatively high. Two parallel-action china china injection molding machines generally use one oil circuit for the clamping device and another oil circuit for the injection device. This is based on the general division of china china injection molding machines.

Consider the oil circuit board of the clamping device and the oil circuit board of the injection device.

Hybrid oil-electric china china injection molding machine integrates the advantages of two drives, and is ingeniously matched. The general design is electric feeding and other actions of hydraulic pressure, such as FLYSE china injection molding machine.

Double pump injection

The dual pump design uses only one oil pump during injection. The oil circuit can be slightly changed so that the two pumps are used for injection, thereby increasing the injection speed to nearly double.

Hot runner mold

The hot runner can shorten the cycle in many ways.

1. If the diameter of the cold runner is larger than the thickness of the finished product, a “nthawi yozizira” will have to wait for the runner to cool to a certain degree before the mold can be opened, but the finished product has already cooled down, causing waste. The runner of the hot runner mold does not need to be cooled, and the finished product determines the cooling time.

2. The amount of plastic in the cold runner is a percentage of the amount of finished plastic, even if it is heavier than the finished product, the injection and feeding time will be lengthened. The use of hot runner molds saves the injection and feeding time required for runner plastics.

3.There are nozzles in the cold runner, and the mold opening stroke should be increased.

4. In multi-cavity injection molding, the cold runner does not guarantee whether the finished product will fall or not. It needs to be taken out with a robotic arm (automatic operation) or manually (semi-automatic operation), and the cycle will be slowed down.