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Showing 1 to 20 of 162 for “"Moulding"”.
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Numerical simulation of the plastics injection moulding process
… widely used for the simulation of the injection moulding process. The influence of the Hele-Shaw approximations is, however, unknown. A two-dimensional numerical model based on the Hele-Shaw formulation, and a model based on the Navier-Stokes equations without the Hele-Shaw approximations were …
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The grinding of polyethylene powders for use in rotational moulding
… polyethylene is used extensively in rotational moulding. The powder characteristics are recognised as being important for the production of good quality parts, and the grinding process is a crucial step in the preparation of the powders. The primary objectives of this research were to analyse …
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Development of a new method for fibre reinforced rotational moulding
… incorporating fibre reinforcement in rotational moulding. Various types of mouldings were tried, ranging from flat sheet mouldings to two shot cube mouldings. As flat sheet mouldings did not result in proper composites, they were abandoned at an early stage in the project. Single shot cube …
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Improvements in Liquid Composite Moulding through Assessment of Process Parameters
Liquid Composite Moulding (LCM) describes a family of manufacturing processes utilised for the manufacture of fibre reinforced plastics. With a large number of variables and process parameters requiring active measurement and control, achieving high quality simultaneously with low cost and …
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In-line process measurements for injection moulding control. In-line rheology and primary injection phase process measurements for injection moulding of semi-crystalline thermoplastics, using instrumented computer monitored injection moulding machines, for potential use in closed loop process control
… aid to closed loop process control for injection moulding. The feasibilities of attaining rheological and process measurements of sufficient accuracy and precision for use in process control are investigated. The influence of rheological and process measurements on product quality are investigated …
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Microinjection moulding and material testing of polyolefins on a small scale
De onderzoeksgroep SMaRT (KU Leuven) concentreert zich op polymeren en colloïdale dispersies om nieuwe materialen te ontwikkelen en hun verwerkingsgedrag te bestuderen. De ontwikkeling en studie van nieuwe materialen is een uitzonderlijk lang en duur proces. Voor de studie van het verwerkingsgedrag …
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A STUDY OF THE ROTATIONAL MOULDING OF LINEAR LOW DENSITY POLYETHYLENE
… was to increase understanding of the rotational moulding process by studying the rotational moulding of linear low density polyethylene, and to thus contribute to the optimisation of the process. A test moulding was selected as the standard. It was established that the heating cycle of the …
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Advanced batch process modelling, control and optimization for injection stretch blow moulding
The injection stretch blow Moulding (ISBM) process is widely used to manufacture PET bottles for the beverage and consumer goods industry. However, at present the ISBM process, including both the stretch blow moulding and reheating processes, are totally open-loop. The processes are complex and …
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Reducing cycle times in rotational moulding of plastics: a theoretical and experimental analysis
Rotational moulding is one of the fastest growing sectors of the plastics processing industry today. Yet, in spite of the advantages which it has to offer in terms of the economic production of quite complex, stress-free articles, its competitiveness and widespread growth is still hampered by long …
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Development of water-soluble PEG-based binder systems for Ti Metal Injection Moulding
… justify the costs. Therefore, Metal Injection Moulding (MIM) has received increasing attention in recent decades to prepare Ti products as a cost-effective and competitive processing route. Nevertheless, impurity control is still a great challenge to Ti Metal Injection Moulding (Ti- MIM). …
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Application of restaurant waste lipids (RWL) as a binder component in metal injection moulding
… as binder component in metal injection moulding since it’s contains rich amounts of free fatty acids which is suitable as secondary binder components. Different binder formulation of RWL and Polypropylene (PP) were prepared as the binders and the mixture of these binders with water …
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Modelling the constitutive behaviour of poly(ethylene terephthalate) for the stretch blow moulding process
The stretch blow moulding (SBM) process is the main method for the mass production of PET containers. Understanding and modelling the behaviour of amorphous PET (aPET) is critical for design the optimum product and process.<br/><br/>However due to its nonlinear viscoelastic behaviour, the behaviour …
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DEVELOPMENT OF FUZZY-NEURO APPROACH BASED INTELLIGENT SYSTEMS FOR PARAMETER RESETTING OF INJECTION MOULDING
Plastic injection moulding is a commonly used manufacturing process due to its mass production capacity and relatively low production cost per part. However, process parameter setting for moulding defect correction is a complex and difficult task since a large number of factors ranging from part …
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Allegory, mimesis and the text: theological moulding of Lukan parables in Codex Bezae Cantabrigiensis
The approach of this thesis is a departure from the traditional philological examination of understanding the variant readings in Codex Bezae Cantabrigiensis. The parables of Jesus in Luke are the object of investigation. The witness of the Church Fathers in the form of their allegorical exegesis …
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A study of heat transfer and process control in the rotational moulding of polymer powders
… of heat transfer during the rotational moulding process for plastics. A computer simulation was developed in order that a fundamental understanding of the interaction between biaxial motion, powder properties, mould materials and forced convective heating could be obtained. Temperature …
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Investigation of mould design and process parameter optimisation of plastic injection moulding for thin wall part
In plastic injection moulding industries such as automotive, packaging and medical, demands for thin wall parts increases for the reason of light weight, lower cycle time, lower part cost and higher productivity. However, a lot of challenges faced by the moulders since the mould and processing …
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Investigation of injection moulding for novel drug delivery systems. An investigation into the use of injection moulding to produce pharmaceutical dosage forms and to understand the relationship between materials, processing conditions and performance, in particular drug release and stability
The feasibility of the injection moulding (IM) was explored for the development of novel drug delivery systems. Controlled release formulations were developed using a substituted cellulose derivative, hydroxypropyl methyl cellulose acetate succinate (HPMCAS) and a graft co-polymer (Soluplus®). BCS …
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Fibre Length Distribution and Dispersion during the Injection Moulding Process: An experimental study evaluating fibre length attrition and dispersion during processing of long glass fibre reinforced polymer composites in injection moulding including an evaluation of long glass fibre measurement techniques
… dispersion and distribution within the injection moulding process of long glass fibre reinforced polypropylene, sponsored by Autodesk Simulation. The primary material used in this investigation was a 15 mm long glass fibre reinforced polypropylene consisting of two fibre content levels, 20 wt. % …
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