Momwe mungakulitsire moyo wautumiki wamakina omangira jekeseni

Zapulasitiki zigawo za makina opangira jekeseni, apa akunena za: screw, Sungunulani mbiya, mutu wa rabala, mphete ya mphira, mphira gasket.

Pamene a makina jekeseni akamaumba ikugwira ntchito, zigawo za pulasitiki zili ngati magudumu a galimoto. Malingana ngati ayambika, adzapanikizidwa, zotsatira, kukangana, ndi kufinya. Kwa tayala lomwelo, kuyendetsa galimoto mumsewu wathyathyathya ndi kuyendetsedwa ndi dalaivala waluso nthawi zambiri kumatha kutalikitsa moyo wa tayalalo.

Ndipo poyendetsa m'misewu yosagwirizana ndi mchenga ndi miyala yambiri, kuphatikizira ndi zochitika pafupipafupi zadzidzidzi mabuleki, chitsanzo pamwamba pa matayala mofulumira opukutidwa ndi kuchotsedwa.

Chifukwa chake, kuonetsetsa kuti makina opangira jekeseni amakhala bwino nthawi zonse, m'pofunika kufotokoza bwino ntchito ya jekeseni akamaumba makina ntchito, kumvetsetsa magwiridwe antchito ndi mtundu wa zipangizo zapulasitiki ntchito, ndi kulimbikitsa kasamalidwe ka kugwiritsa ntchito makina opangira jekeseni kuti achepetse kulephera, kuchepetsa ndalama zosamalira, ndi kukulitsa Cholinga cha moyo wautumiki.

Pamene makina opangira jekeseni akugwira ntchito, zigawo za pulasitiki zili ngati magudumu a galimoto. Malingana ngati ayambika, adzapanikizidwa, zotsatira, kukangana, ndi kufinya. Kwa tayala lomwelo, kuyendetsa galimoto mumsewu wathyathyathya ndi kuyendetsedwa ndi dalaivala waluso nthawi zambiri kumatha kutalikitsa moyo wa tayalalo.

Ndipo poyendetsa m'misewu yosagwirizana ndi mchenga ndi miyala yambiri, kuphatikizira ndi zochitika pafupipafupi zadzidzidzi mabuleki, chitsanzo pamwamba pa matayala mofulumira opukutidwa ndi scraped.Chifukwa chake, to ensure that the injection molding machine is always in good condition, m'pofunika kufotokoza bwino ntchito ya jekeseni akamaumba makina ntchito, understand the performance and quality of the plastic materials used, ndi kulimbikitsa kasamalidwe ka kugwiritsa ntchito makina opangira jekeseni kuti achepetse kulephera, kuchepetsa ndalama zosamalira, and extend The purpose of service life.

Nthawi zambiri, the following aspects affect the service life of the plasticizing system of the injection molding machine:

Choyamba, the effect of mechanical wear:

Some modified plastics are added with minerals, Fiber, metal powder, etc.. The existence of these materials will cause uniform mechanical wear on the screw, three small parts and the melt barrel during the plasticization and injection processing. The nitrided layer and chromium-plated layer can be polished away. After abrasion, the gap between the screw and the melt barrel is increased, which reduces the plasticizing effect, increases the leakage of the injection, reduces the injection efficiency, ndipo amachepetsa kulondola kwa processing.

Chifukwa chake, kuti muchepetse kuvala ndikukulitsa moyo utumiki wa zigawo plasticized, kutentha kuyenera kuchulukitsidwa moyenerera panthawi yokonza ndipo liwiro la screw liyenera kuchepetsedwa. Kugwiritsa ntchito chrome plating kapena bimetallic solutions kumatha kuteteza bwino abrasion.Chachiwiri, kutopa kwamakina ndi ntchito yolemetsa:

Osinthawo amakhala ndi chizolowezi chogwira ntchito yotentha kwambiri ndipo amakhala ndi chizolowezi chogwira ntchito yothamanga kwambiri komanso yothamanga kwambiri., zomwe zimawononga pang'onopang'ono ntchito za zigawo zapulasitiki. Mwachitsanzo, pokonza PC ndi PA mapulasitiki, pamene kutentha sikukwaniritsa zofunikira, kukhuthala kwa pulasitiki ndi kwakukulu kwambiri. Ngati ntchito ya sol ikukakamizidwa panthawiyi, mphamvu ya sol ndi torque ya sol iyenera kuwonjezeka, motero kumawonjezera kutopa kwanthawi yayitali kwa screw. Nthawi yomweyo, because the viscosity of the plastic melt is very high at this time, the injection pressure and injection speed must be increased for injection molding, which increases the impact and load of the three small parts, and accelerates their wear and stress fracture.

Chachitatu, human factors (including operational errors or illegal operations, etc.):

1). When metal impurities are mixed in the plastic and enter the melt barrel together, due to the extrusion effect, the screw edges, grooves, rubber rings, rubber gaskets of the screw will be worn to different degrees, which will cause the injection molding process to be unstable and easy Produce black spots and black streaks;

2), artificially add wrong plastic, add high temperature plastic to the melt barrel set to low temperature, resulting in excessive torque of the screw during the sol, causing stress fatigue of the screw;

3) Cold start is a kind of anxious psychology and irresponsible work attitude. When the temperature of the sol cylinder has not reached the set required temperature or has just reached, the residual material in the barrel absorbs the heat from the heating ring to make the temperature higher, while the temperature of the inner layer is still very low. Chifukwa chake, during cold start The screw torque is very large, causing stress fatigue on the screw. In severe cases, the screw will be twisted quickly, and the rubber head and rubber ring will be twisted.

Most of the metal impurities entering the sol cylinder are brought in with the crushed material. Chifukwa chake, the breakage of the blade of the crusher should be checked frequently, and the blade should be replaced immediately if it is found to be worn.

On the other hand, check and clean the magnets in the blanking hopper frequently. When the metal scraps adsorbed around the magnet are saturated, the adsorption force for the iron scraps on the outer layer will be weakened. Even if it is attracted, it will be easily washed away by the continuously flowing plastic and enter the sol cylinder together.

Chachinayi, correctly assemble, debug and replace parts:

This aspect is also very important. If the assembly of the sol barrel is not tight enough, the screw will touch the sol barrel when the sol or glue is injected, causing the screw or sol barrel to wear. Chifukwa chake, the technical status of the equipment should be checked regularly, and attention should be paid to the abnormal phenomenon of the parts in the process.Fifth, damage caused by improper workmanship:

1) Long-term use of high back pressure sol can accelerate the wear of the three small plasticized parts. This situation generally occurs when toner is used. Since the toner is difficult to disperse, the method of increasing the back pressure is adopted.

2) For high-viscosity plastics, fast sol is used when sol is used to cause stress fatigue of the screw;

3) For high-temperature plastics, especially glass fiber-added plastics, high-speed sol method should not be used.

Sixth, chemical corrosion:

The corroded metal material is iron. Common corrosive plastics include: flame-retardant plastics, acidic plastics, PVC plastics, etc.. After the screw, melt barrel and flange are corroded, some pits are formed on the surface, and the surface is rough, which makes the flow resistance of the melt when the injection molding machine works.

Some materials are easy to adhere to the surface, causing decomposition and carbonization. Severe corrosion will increase the gap between the screw and the melt barrel, onjezerani kutayikira, and reduce the injection efficiency.

Whether it is a flame-retardant plastic or an acid glue, a pulasitiki will decompose acid gas when processed at high temperature, and the plastic melt is easy to be carbonized and stick to the metal. Chifukwa chake, on the one hand, the plasticized components should be made of stainless steel or surface chromium plating; Pambuyo pa kukula kwake, low back pressure, low temperature and low shear processes should be used as much as possible in the production and processing to reduce the degradation of the plastic;

In the third aspect, due to the thermal sensitivity of the above plastics, too high temperature or too long heating time.it is easy to decompose, degrade and carbonize the plastics. Chifukwa chake, the production process should avoid and reduce artificial shutdowns. If you need to stop the machine, you should lower the temperature first, close the material gate.And after the melt in the sol tube is finished, switch to PP or PS to clean the sol tube before stopping the makina.

Ngati muli ndi mafunso pa mafakitale apulasitiki,plz omasuka kufunsa timu ya FLYSE,tidzakupatsani utumiki wabwino kwambiri!

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