Vpliv parametrov brizganja na maso in obliko neenakomerno hlajenih kosov

Draksler, Matic (author), Valentinčič, Joško (mentor), Orbanić, Henri (comentor)

V nalogi obravnavamo vpliv štirih parametrov brizganja na maso in deformacije izdelkov iz polietilena visoke gostote, ki se v orodju hladijo neenakomerno po celotnem volumnu. Izdelke smo brizgali pri 6 različnih kombinacijah parametrov. Pri vsaki kombinaciji parametrov smo izvedli meritve na vseh izdelkih (48 gnezdno orodje), dobljenih iz 5 ciklov brizganja. Izdelke smo tehtali in opravili meritve ustreznosti oblike, kjer smo določali kot nagiba izdelka. Ugotovili smo, da je masa brizganega izdelka odvisna od časa naknadnega tlaka in gnetilnega tlaka. Na nagib izdelkov pomembno vpliva čas hlajenja in čas faze naknadnega tlaka, medtem ko hitrost brizganja in gnetilni tlak nimata večjega vpliva.

• Language: Slovenian
• Keywords: parametri brizganja, polietilen visoke gostote, temperaturne deformacije, ohlajanje, krčenje, nagib, temperiranje orodja
• Work type: Bachelor thesis/paper
• Organization: FS - Faculty of Mechanical Engineering
• Year: 2017
• PID: 20.500.12556/RUL-94946
• Publication date in RUL: 11.09.2017

Secondary language

• Language: English
• Title: Effect of injection molding parameters on weight and shape of non-uniform cooled parts

Abstract

In final thesis the effect of 4 injection molding parameters on weight and curvature of HDPE parts which undergo non-uniform cooling in the mold has been studied. 6 different combinations of injection molding parameters were used for producing parts. At each combination of parameters all parts (48 cavity mold) from 5 injection molding cycles were measured. Products were weighed and measurements of curvature were performed on each molded part to determine angle of curvature. It was determined that weight of molded part depends on hold time and screw back pressure. Important influence on curvature of molded parts was found in cooling time and hold time, since bigger influence of injection speed and screw back pressure on curvature of parts wasn't detected.

• Keywords: injection molding parameters, high-density polyethylene, temperature deformations, cooling, shrinkage, slope, mold tempering