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Yaygın plastik malzeme zorluklarına pratik yanıtlar

Makalelere Göz At →
11636 soru
Q
EVA internal stress concentration is severe
A
Internal stress is caused by fast injection and uneven cooling; reducing speed, uniform cooling, and annealing are key
Injection Molding EVA internal stress orientation stress annealing treatment uniform cooling
15 görüntüleme
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Q
EVA surface pockmarks are dense
A
Pockmarks are caused by raw material impurities and mold damage; pure raw material and mold maintenance are key
Extrusion & Post EVA surface pockmarks impurity particles mold repair raw material purity
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Q
EVA surface microcracks
A
Microcracks are caused by excessive internal stress; annealing and crack-resistant design are key
Production & Quality EVA microcracks internal stress annealing treatment stress concentration design
16 görüntüleme
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Q
EVA surface gloss is poor
A
Poor gloss is caused by rough mold and crystalline scattering; polishing the mold and controlling crystallization are key
Molds & Tooling EVA gloss mold polishing crystalline scattering nucleating agent
17 görüntüleme
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Q
EVA heat-sensitive decomposition and yellowing
A
EVA heat-sensitive decomposition is caused by VA deacetylation; temperature control is the fundamental countermeasure
Material Analysis EVA thermal decomposition deacetylation yellowing heat stabilizer temperature control
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Q
EVA purging is difficult
A
Purging difficulty is caused by EVA's strong adhesion; PE flushing and temperature reduction are key
Processing Machinery EVA purging difficulty adhesion PE flushing dedicated purging compound
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Q
EVA material changeover residue
A
Changeover residue is caused by incomplete purging; thorough purging and disassembly are key
Processing Machinery EVA changeover residue purging compound screw disassembly dead zone cleaning
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Q
EVA shrinkage rate is unstable
A
Unstable shrinkage rate is caused by batch differences and temperature fluctuations; raw material and temperature control are key
Material Analysis EVA shrinkage rate batch difference temperature control stability crystallization consistency
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Q
EVA foam hardness is too high
A
High hardness is caused by high density and excessive crosslinking; reducing density and moderate crosslinking are key
Molding Process EVA foam high hardness foam density crosslinking degree VA content
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Q
EVA internal crystallization is coarse
A
Coarse crystallization is caused by slow cooling; fast cooling and nucleating agent are key
Molding Process EVA coarse crystallization spherulite refinement nucleating agent cooling rate
16 görüntüleme
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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
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