Pri kontroli proizvodnje kakovosti UPVC je treba nameniti tri ključne točke

Ningbo Fangli Technology Co., Ltd., kot proizvajalec s celotnim naborom opreme za proizvodnjo linij ekstruderjev že skoraj 30 let, naš ekstruder cevi iz PVC prevzame napredno vzporedno zasnovo z dvojnim vijakom, ki zagotavlja močno garancijo za PVC. Kakovost in nadzor produktivnosti sta pomemben člencev pri proizvodnji ekstrudiranja je treba biti pozoren na glavne točke pri kontroli kakovosti proizvodnje ekstrudiranja cevi.

1. Izbira surovin in formule

Smola SG-5 z viskoznostjo (1,7 ~ 1,8)×10-3Pa•s is suitable for hard cev production. Usually used as a three-salt base lead stabilizer, its thermal stability is good, and good lubricity of lead, barium soap and used to increase the lubricity. In the processing of hard cevs, it is necessary to consider the internal lubrication to reduce the intermolecular force, so that the melt viscosity decreases for forming, and the external lubrication to prevent the melt and hot metal adhesion, so that the surface of the products is bright. Metal soaps so generally used for internal lubrication, while low melting wax is used for external lubrication. Fillers mainly use calcium carbonate and barium (barite powder), calcium carbonate makes the surface performance of the cev is good, barium can improve the formability, so that the cev is easy to finalize, both can reduce costs, but remember that too much will affect the performance of the cev, pressure cev and corrosion resistant cev is best not to add or add less fillers.

2. Ključne točke procesa

Cev UPVC je oblikovana s PVC-smolo SG-5 in dodana s stabilizatorjem, mazivom, polnilom, pigmentom itd. Te surovine se po ustrezni obdelavi gnetejo po formuli. PVC cev ekstruder Fanglii sprejme dvovijalni ekstruder, ki ga lahko neposredno oblikujemo s prahom.

In addition, two points should be paid attention to when the powder is used to extrude cev directly without granulation: first, twin-screw extruder is the best choice for the direct extrusion of powder. Because the powder has less one mixing shear plasticization process compsod with the granular material, the twin-screw extruder can strengthen the shear plasticization and achieve the expected effect; Second, because the granule is compacted than the powder, the heat and heat conduction is poor, so the processing temperature of the powder is about 10℃ nižja od temperature obdelave ustreznega zrnca.

3. Ključne točke stanja procesa in nadzora

V proizvodnem procesu je PVC vrsta toplotno občutljivega materiala, ki zahteva strog nadzor temperature oblikovanja PVC. Zlasti za RPVC, saj je njegova temperatura predelave zelo blizu temperature razgradnje, kar je pogosto posledica razpada zaradi nepravilne regulacije temperature. Zato je treba temperaturo iztiskanja določiti po formuli, lastnostih ekstruderja, strukturi matrice, hitrosti vijaka, položaju merilne točke temperature, napaki termometra, globini merilne točke itd.

Zgorajso nadzoru kakovosti je treba nameniti tri ključne točke of UPVC cev production. Upamo, da vam bomo pomagali. Če imate kakršno koli povpraševanje, nas pokličite za podrobnejše povpraševanje. Zagotovili vam bomo predloge za strokovno nabavo opreme in tehnična navodila.

https://www.fangliextru.com/upvc-pvc-uh-cev-extrusion-equipment.html