Ki jan yo diminye sik la bòdi piki nan machin piki bòdi Lachin?

Ki jan yo diminye sik la bòdi piki nan machin piki bòdi Lachin?

Nan sosyete sa a biznis de pli zan pli konpetitif, amelyore efikasite pwodiksyon an se yon pwoblèm ki merite atansyon. Atik sa a dekri yon varyete fason yo amelyore sik la piki lè l sèvi avèk ki deja egziste oswa ki fèk fèt Lachin piki machin bòdi oswa mwazi

Sik piki

La sik piki nan yon machin idwolik kondwi Lachin piki bòdi refere a kòmansman an nan blocage mwazi nan pwochen blocage mwazi an.. Mwazi blocage jeneralman divize an kat seksyon: vit mwazi blocage, ralanti mwazi blocage, pwoteksyon mwazi presyon ki ba ak presyon mwazi segondè blocage.

Piki a kòmanse apre gwo-presyon blocage a fini, epi li tou divize an plizyè seksyon. Plastik la fonn ranpli kavite a pandan piki. Lè kavite a plen, presyon an monte sevè, Se konsa, fen piki a yo rele tou faz procesna a.

Lè kontwòl la pa apwopriye, pwodwi a fini pral gen burrs.Presyon an kenbe kòmanse apre piki a fini. An reyalite, refwadisman an kòmanse apre yo fin ranpli kavite a, sa vle di, li kòmanse nan kenbe presyon an. Lè mwazi an refwadi, pwodwi a fini retresi anba frèt la.

Fonksyon kenbe presyon se pase nan kourè frèt la ki poko solidifye, epi ranpli rekreyasyon yo ki te fòme pa kontraksyon an nan yon presyon kenbe jeneralman pi ba pase presyon an piki, se konsa ke pwodwi a fini plen (san tach) lè li demole.

Lè kourè frèt la solidifye, li pa gen sans kenbe presyon an ankò, epi presyon an ka sispann. Presyon an kenbe ka divize an plizyè seksyon, ak presyon kenbe nan chak seksyon diferan (anjeneral diminye etap pa etap), ki divize pa tan. Tan an total kenbe detèmine pa pwa a nan pwodwi a fini oswa absans la nan dents sou pwodwi a fini. Ajiste nan yon ti tan kenbe, epi ogmante tan kenbe pou chak piki, jiskaske pwa a nan pwodwi a fini pa ogmante ankò oswa dents yo akseptab, tan an kenbe pa bezwen ogmante.

La “tan refwadisman” paramèt mete sou machin nan bòdi piki Lachin se yon peryòd de tan soti nan fini an nan kenbe presyon an nan ouvèti a nan mwazi an., men refwadisman an kòmanse osi bonè ke kavite mwazi an plen ak plastik. Objektif la nan “tan refwadisman” se fè pwodwi a fini kontinye refwadi ak solidifye pou li pa pral defòme pa piki a lè li sou fòm piki.. Li ta dwe di ke la “tan refwadisman” se sòti nan eksperyans la.

Blocage

Dènyèman ki fèt baskile-kalite Lachin piki bòdi machin yo te rejenere mwazi sikui lwil oliv blocage yo nan lòd yo fè efò pou pi wo vitès mwazi blocage.. Li apwopriye pou itilize anba site ke mwazi an pa sijè a gwo enpak. ,

Segondè presyon mwazi blocage

Itilizasyon fòs ki pi ba a fixation ki ka anpeche pwodwi a fini soti nan pwodwi burrs ka diminye tan ki nesesè pou seksyon an blocage wo-presyon.. Anplis, kravat yo, baskile, ak modèl mwazi, Lachin Lachin piki machin bòdi, ak modèl yo pral pwolonje tou lavi yo akòz itilizasyon fòs blocage ki ba.

If a mold with a clamping force of 50t is sufficient, there is no need to use a clamping force of 51t, even though your china china injection molding machine has a higher clamping force.

piki

The highest injection speed can be used when the finished product does not produce bubbles or black spots due to scorched plastic. Especially for thick-walled injection molding, a large amount of air-storing space in the mold cavity is filled with molten plastic. Too high injection speed prevents the air in the cavity from being discharged out of the mold, resulting in bubbles.

Using the lowest injection pressure can correspondingly reduce the required clamping force (expansion force), while using the lowest barrel temperature can shorten the “tan refwadisman”.

Hold pressure

The shortest holding time can be determined from the weight of the finished product or the acceptable dent. There are many thin-walled products that do not need to hold pressure, because the inner layer of the finished product is basically solidified immediately after the injection is completed.

Cooling time

There is a saying: The mold is basically a heat exchanger. Wi, the mold continuously takes away the heat of melting through the cold water channel, and a properly designed mold can improve the efficiency of heat exchange. Sepandan, if allowed, ice-water cooling can shorten the “tan refwadisman”. If the ice water is cooled to make the mold condensation, the dry air blower and the sealed mold clamping device can reduce the degree of dew point and prevent condensation.

If the plasticizing capacity is not enough and it becomes a bottleneck, the following treatments can be done during screw design and parameter adjustment:

1. Barrier screw can increase plasticizing capacity.
2. Large diameter (C) screw can increase plasticizing capacity.
3. Increasing the groove depth of the screw can increase the plasticizing capacity.
4. Increasing the speed of the screw can increase the plasticizing capacity (some plastics that are sensitive to shear, tankou PVC, PET, elatriye, cannot use this method).
5. Reduce the back pressure as much as possible, otherwise it will increase the plasticizing speed.
6. The hydraulic sealing nozzle is adopted, so that the injection mold can be plasticized when opening and closing the injection mold.
7. Itilizasyon konsepsyon pre-plastifye pèmèt vis la plastifye pandan sik la eksepte pou piki a ak tan kenbe..
8. Adopte aparèy pou kenbe presyon, se konsa ke vis la ka plastifye nan seksyon an presyon-kenbe.

Sèvi ak pi gwo vitès la pou louvri mwazi an piki san yo pa chire pwodwi fini a ak pwodwi yon bri ouvèti mwazi piki byen fò.. Gen kèk piki sofistike Lachin Lachin piki bòdi machin gen ekipman dekonpresyon anvan ouvèti mwazi piki., e menm gwo vitès piki ouvèti mwazi pa pral pwodwi bri. Yo nan lòd yo reyalize mwazi piki egzat kanpe pozisyon anba gwo vitès ouvèti mwazi piki, tiyo fren oswa kontwòl fèmen-bouk ka itilize.

Sou ti piki Lachin Lachin piki bòdi machin ak fòs ekspilsyon ki ba, ka itilize pneumatik ekspilsyon, ki pi wo pase vitès ekspilsyon idwolik. Ekspilsyon elektrik se pi vit pase ekspilsyon chanm konpwesyon lè.

Mwazi nan piki ka fèt yo dwe ekspilse pa aksyon an ouvèti mwazi piki olye pou yo aparèy la ekspilsyon sou machin nan piki Lachin Lachin piki bòdi.. Metòd sa a ka sèlman ekspilse yon fwa. Sa a se metòd ki pi senp pou ekspilsyon pandan w ap louvri mwazi an piki.

Sèvi ak sikwi lwil oliv endepandan, sikwi gaz oswa kontwòl sikwi, li ka reyalize fonksyon an nan ekspilsyon miltip pandan y ap louvri mwazi an piki pandan y ap ekspilsyon. Pou

Ekipe ak ekipman videyo ak òdinatè, li ka byen vit analize si wi ou non pwodwi yo fini yo tout tonbe apre yon sèl ekspilsyon. Dezyèm ekspilsyon an fèt lè yo pa tout tonbe, konsa 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, piki, pressure holding, cooling and injection mold opening. Feeding is carried out at the same time during the “tan refwadisman” 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. Nan ka sa, 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. An reyalite, the hydraulic china china injection molding machine can also achieve this goal when using 3 independent oil circuits. Se poutèt sa, 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 oswa plis. In order to prevent the molten plastic from solidifying before filling the cavity, thin-wall injection molding is high-speed (and high acceleration/deceleration) bòdi piki. 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 “tan refwadisman”, 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 fwa.

Blow demoulding

If the product can be demolded by blowing, it is easy to blow while opening the mold. Anjeneral, 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, la “tan refwadisman” 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.