Kumaha manjangkeun umur jasa mesin suntik molding

Diplastik komponén mesin suntik molding, didieu nujul kana: screw, tong ngalembereh, sirah karét, ring karét, pakét karét.

Kapan mesin injection molding damel, komponén plasticized kawas roda kandaraan motor. Salami aranjeunna dimimitian, aranjeunna bakal subjected kana tekanan, dampak, gesekan, jeung squeeze. Pikeun ban sarua, nyetir di jalan datar tur operasi ku supir terampil mindeng bisa manjangkeun umur layanan tina ban.

Sareng nalika nyetir di jalan anu henteu rata sareng seueur keusik sareng kerikil, gandeng jeung lampah ngerem darurat sering, pola dina beungeut ban gancang digosok sarta scrapped.

Ku sabab kitu, pikeun mastikeun yén mesin suntik molding salawasna dina kaayaan alus, perlu netelakeun kinerja mesin suntik molding dipaké, ngartos kinerja sarta kualitas nu bahan palastik dipaké, jeung nguatkeun manajemén pamakéan mesin suntik molding pikeun ngurangan ongkos gagalna, ngurangan biaya pangropéa, jeung manjangkeun Tujuan tina hirup jasa.

Nalika mesin suntik molding berpungsi, komponén plasticized kawas roda kandaraan motor. Salami aranjeunna dimimitian, aranjeunna bakal subjected kana tekanan, dampak, gesekan, jeung squeeze. Pikeun ban sarua, nyetir di jalan datar tur operasi ku supir terampil mindeng bisa manjangkeun umur layanan tina ban.

Sareng nalika nyetir di jalan anu henteu rata sareng seueur keusik sareng kerikil, gandeng jeung lampah ngerem darurat sering, pola dina beungeut ban gancang digosok sarta scrapped.Ku kituna, to ensure that the injection molding machine is always in good condition, perlu netelakeun kinerja mesin suntik molding dipaké, understand the performance and quality of the plastic materials used, jeung nguatkeun manajemén pamakéan mesin suntik molding pikeun ngurangan ongkos gagalna, ngurangan biaya pangropéa, and extend The purpose of service life.

Sacara umum, the following aspects affect the service life of the plasticizing system of the injection molding machine:

kahiji, the effect of mechanical wear:

Some modified plastics are added with minerals, serat kaca, metal powder, jsb. 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, sarta ngurangan akurasi processing.

Ku sabab kitu, guna ngaleutikan maké jeung manjangkeun hirup jasa komponén plasticized, hawa kudu appropriately ngaronjat salila ngolah jeung speed screw kudu ngurangan. Pamakéan plating Chrome atanapi solusi bimetallic bisa leuwih éféktif nyegah abrasion.Second, kacapean mékanis jeung karya overload:

The adjusters habitually nyetel karya-suhu low jeung habitually nyetel-speed tinggi jeung karya-tekanan luhur., nu laun degrades kinerja komponén plasticized. Salaku conto, nalika ngolah PC sareng plastik pa, lamun hawa teu minuhan sarat, viskositas palastik pisan badag. Lamun lampah sol kapaksa dina waktos ieu, tekanan sol jeung torsi sol kudu ngaronjat, sahingga ngaronjatkeun kacapean stress of screw nu. Dina waktos anu sasarengan, 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.

katilu, human factors (including operational errors or illegal operations, jsb.):

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, ngabalukarkeun stress kacapean screw nu;

3) Mimitian tiis mangrupikeun jinis psikologi hariwang sareng sikep padamelan anu teu tanggung jawab. Nalika suhu silinder sol teu ngahontal set suhu diperlukeun atawa geus ngan ngahontal, bahan residual dina tong absorbs panas tina ring pemanasan sangkan hawa nu leuwih luhur, sedengkeun suhu lapisan jero masih pohara handap. Ku sabab kitu, salila tiis mimiti The screw torsi kacida gedéna, ngabalukarkeun kacapean stress on screw nu. Dina kasus parna, screw bakal twisted gancang, jeung sirah karét jeung ring karét bakal twisted.

Seuseueurna pangotor logam anu asup kana silinder sol dibawa sareng bahan anu ditumbuk. Ku sabab kitu, pegatna sabeulah crusher kudu dipariksa remen, 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.

Kaopat, 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. Ku sabab kitu, 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, jsb. 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, ningkatkeun leakage nu, and reduce the injection efficiency.

Whether it is a flame-retardant plastic or an acid glue, éta palastik will decompose acid gas when processed at high temperature, and the plastic melt is easy to be carbonized and stick to the metal. Ku sabab kitu, on the one hand, the plasticized components should be made of stainless steel or surface chromium plating; di sisi anu sanésna, 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. Ku sabab kitu, 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 mesin.

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