Doprinos sustavnosnom razvoju kalupa za injekcijsko prešanje plastomera

scientific master's theses

• Title (english): Contribution to systemic development of moduls for injection moulding of thermoplastics
• Author: Damir Godec
• Mentor: Igor Čatić (mentor)
• Committee member: Dorian Marjanović (predsjednik povjerenstva)
• Committee member: Igor Čatić (član povjerenstva)
• Committee member: Karl Kuzman (član povjerenstva); VIAF: 32146332818518731560
• Granter: University of Zagreb; Faculty of Mechanical Engineering and Naval Architecture; Zagreb
• Defense date and country: 2000-10-30, Croatia
• Scientific / art field, discipline and subdiscipline: TECHNICAL SCIENCES; Mechanical Engineering
• Universal decimal classification (UDC): 678 - Industries based on macromolecular materials. Rubber industry. Plastics industry ; 57 - Biological sciences. Physical anthropology. Biodiversity

Abstract

U radu je opisana problematika konstruiranja kalupa za injekcijsko prešanje plastomera. Ukratko je dan pregled novih trendova na području konstruiranja i izradbe kalupa. Također je obrađena problematika strategije razvoja kalupa, gdje se težište daje na definiranju obitelji otpresaka i kalupa prema načelu sličnosti, čime se omogućuju varijantne konstrukcije kalupa. Detaljno su opisani funkcije i podsustavi kalupa, a posebno je težište dano analizi procesa konstruiranja kalupa koji obuhvaća fazu koncepcijskog oblikovanja kalupa, fazu dimenzioniranja elemenata kalupa i fazu izradbe konstrukcijske dokumentacije kalupa. Svaka od faza razvoja kalupa prikazana je kao sustav primjenom temeljnih koncepata sustavnosne teorije tehnike, čime su definirani sustavnosni modeli pojedinih faza razvoja kalupa. S pomoću sustavnosnih modela razvoja kalupa dobiva se bolji uvid u sam proces konstruiranja kalupa, te se definira točan redoslijed izvršavanja aktivnosti. U okviru koncepcijskog oblikovanja kalupa predložena je uporaba dijagrama odlučivanja s pomoću kojih se dolazi do konstrukcijskih rješenja pojedinih parcijalnih funkcija kalupa. Postojeći dijagrami odlučivanja provjereni su na konkretnim primjerima, te su na temelju analize dijagrama načinjene njihove ispravke. Tijekom razrade faze dimenzioniranja elemenata kalupa dan je pregled analitičkih i numeričkih reoloških, toplinskih i mehaničkih proračuna kalupa. Posebno je analizirana mogućnost primjene računala pri razvoju kalupa. U radu je načinjen primjer konstruiranja kalupa prema prethodno definiranim smjernicama, pri čemu je načinjena usporedba postupka i rezultata analitičkog i numeričkog proračuna kalupa.

Abstract (english)

The paper studies the problems regarding design of moulds for injection moulding of thermoplastics. A brief overview is given of the new trends in the field of mould design and manufacturing. It also deals with the problems of mould development strategy, focusing on defining of moulding and mould families according to the principles of similarity, thus providing possibilities of mould design variations. The mould functions and subsystems are described in detail, with special consideration of the mould design process analysis including conceptual mould design, mould elements dimensioning, and mould design documentation development. Each of these mould development phases is presented as a system by applying basic concepts of systemic technology theory, thus defining the systemic models of individual mould development phases. Using the systemic models of mould development offers better insight in the mould design process itself, and the exact sequence of activities is defined. Within the conceptual mould design, the use of decision-making diagrams is suggested which provides design solutions of certain partial mould functions. The existing decisionmaking diagrams have been checked on concrete examples, and their analysis has led to corrections. During the phase of mould components dimensioning, an overview of analytical and numerical rheological, thermal and mechanical mould calculations is given. The possibility of using computers in mould development has been analysed with special consideration. The paper provides an example of designing a mould according to pre-defined guidelines, comparing the procedure and the results of analytical and numerical mould calculation.

• Keywords: injekcijsko prešanje plastomera; kalup; metodičko konstruiranje; sustavnosna teorija; koncepcijsko oblikovanje kalupa; dijagrami odlučivanja; analitički proračun kalupa; numerički proračun kalupa
• Keywords (english): injection moulding of thermoplastics; mould; methodical design; systemic theory; conceptual mould design; decision diagrams; analytical mould calculation; numerical mould calculation
• Language: croatian
• URN:NBN: urn:nbn:hr:235:132206
• Study programme: Title: Mechanical Engineering - mr.sc.; Study programme type: university; Study level: postgraduate; Academic / professional title: magistar znanosti (magistar znanosti)
• Type of resource: Text
• File origin: Born digital
• Access conditions: Open access
• Created on: 2021-02-03 13:02:09