Sorun ve Çözüm

Yaygın plastik malzeme zorluklarına pratik yanıtlar

Makalelere Göz At →

Processing difficulties caused by melt flow rate mismatch of random copolymer polypropylene raw material

MFR mismatch needs to be solved by selecting suitable grades and adjusting process parameters; the key is to establish an incoming material MFR testing system.

Injection Molding melt flow rategrade selectionincoming material testingprocess adjustmentraw material mixing

10 görüntüleme

Tam Yanıtı Oku →

Environmental stress cracking appearing in random copolymer polypropylene injection molded products

Environmental stress cracking is the result of the synergistic action of internal stress and chemical media and needs to be prevented from two aspects: reducing internal stress and avoiding media contact.

Injection Molding environmental stress crackingresidual stressstress concentrationannealingchemical media

10 görüntüleme

Tam Yanıtı Oku →

Stress whitening appearing near the gate of random copolymer polypropylene injection molded products

Gate stress whitening is caused by excessive shear stress and molecular orientation and is improved by enlarging the gate, reducing injection speed and increasing temperature.

Injection Molding stress whiteninggate shearmolecular orientationinjection speedgate size

9 görüntüleme

Tam Yanıtı Oku →

Dimensions of random copolymer polypropylene injection molded products continue to change after demolding

Post-shrinkage is an inherent characteristic of crystalline materials; dimensional stability is ensured through full cooling, annealing and environmental control.

Injection Molding post-shrinkagecrystallinitydemolding temperatureannealingdimensional stability

10 görüntüleme

Tam Yanıtı Oku →

Cracking/micro-cracks appearing on the surface of random copolymer polypropylene injection molded products

Micro-cracks are a manifestation of excessive residual internal stress and need to be prevented by optimizing temperature parameters, reducing internal stress and improving demolding conditions.

Injection Molding crackingmicro-cracksinternal stressmolecular orientationdraft angle

9 görüntüleme

Tam Yanıtı Oku →

Uneven color/color difference appearing in random copolymer polypropylene injection molded products

Color difference is caused by uneven colorant dispersion or process parameter fluctuations and needs to be ensured from three aspects: mixing, plasticizing and temperature control.

Injection Molding color differencecolor masterbatch dispersiontemperature stabilityback pressurescrew mixing

9 görüntüleme

Tam Yanıtı Oku →

Underfill/short shot appearing in random copolymer polypropylene injection molded products

Short shot is the result of insufficient melt fluidity or excessive filling resistance and needs to be solved by increasing temperature and pressure and improving the gating and venting system.

Injection Molding short shotunderfillinjection pressuremelt fluiditymold venting

9 görüntüleme

Tam Yanıtı Oku →

Flow marks appearing on the surface of random copolymer polypropylene injection molded products

Flow marks are a manifestation of an unstable melt flow front; the flow front is stabilized by increasing injection speed, mold temperature and melt temperature.

Injection Molding flow markinjection speedmold temperaturemelt frontmulti-stage injection

9 görüntüleme

Tam Yanıtı Oku →

Uneven surface gloss of random copolymer polypropylene injection molded products

Uneven gloss reflects inconsistencies in mold surface condition and melt flow and needs to be improved from three aspects: mold polishing, temperature uniformity and injection process.

Injection Molding uneven glossmold polishingtemperature uniformityinjection speedcooling system

9 görüntüleme

Tam Yanıtı Oku →

Weld lines appearing in random copolymer polypropylene injection molded products

Weld lines are a manifestation of poor fusion of merging melt streams; melt fusion quality is improved by increasing melt temperature, injection speed and mold temperature.

Injection Molding weld linemelt merginginjection speedmold temperaturegate design

9 görüntüleme

Tam Yanıtı Oku →

Önceki 1 ... 26 27 28 29 30 31 32 ... 151 Sonraki

Kategoriler

Tüm Konular 11636 Material Drying 1439 Injection Molding 1506 Molding Process 740 Molds & Tooling 1506 Processing Machinery 2025 Extrusion & Post 2239 Blow Molding 315 Thermoforming 141 Material Analysis 1343 Production & Quality 382

Sorun ve Çözüm

Kategoriler

Teklif Al