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Dissertations / Theses on the topic 'Injection molding of plastics'

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Published: 4 June 2021

Last updated: 30 July 2024

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1

Berkery, Daniel J. (Daniel John). "Process monitoring for plastics injection molding." Thesis, Massachusetts Institute of Technology, 1993. http://hdl.handle.net/1721.1/12746.

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Thesis (M.S.)--Massachusetts Institute of Technology, Dept. of Electrical Engineering and Computer Science, 1993 and Thesis (M.S.)--Massachusetts Institute of Technology, Sloan School of Management, 1993.<br>Includes bibliographical references (leaves 196-197).<br>by Daniel John Berkery.<br>M.S.

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2

Pham, Giang T. "Ejection force modeling for stereolithography injection molding tools." Thesis, Georgia Institute of Technology, 2001. http://hdl.handle.net/1853/18214.

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3

Yang, Yi. "Injection molding control : from process to quality /." View abstract or full-text, 2004. http://library.ust.hk/cgi/db/thesis.pl?CENG%202004%20YANG.

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Thesis (Ph. D.)--Hong Kong University of Science and Technology, 2004.<br>Includes bibliographical references (leaves 218-244). Also available in electronic version. Access restricted to campus users.

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4

Yao, Ke. "Energy-efficient control in injection molding /." View abstract or full-text, 2008. http://library.ust.hk/cgi/db/thesis.pl?CENG%202008%20YAO.

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5

Gomes, Vincent G. (Vincent Gracias). "The dynamics and control of melt temperature in thermoplastic injection molding /." Thesis, McGill University, 1985. http://digitool.Library.McGill.CA:80/R/?func=dbin-jump-full&object_id=65921.

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6

Rios, Erick E. "Design and manufacturing of plastic micro-cantilevers by injection molding." Thesis, Georgia Institute of Technology, 2003. http://hdl.handle.net/1853/18888.

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7

Riddles, Mornay. "Prediction of shrinkage and warpage in injection moulded components using computational analysis." Thesis, Peninsula Technikon, 2003. http://hdl.handle.net/20.500.11838/1265.

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Thesis (MTech (Mechanical Engineering))--Peninsula Technikon, 2003<br>Injection moulding is a process by which molten polymer is forced into an empty cavity of the desired shape. At its melting point, polymers undergo a volumetric expansion when heated, and volumetric contraction when cooled. This volumetric contraction is called shrinkage. Once the mould cavity is filled, more pressure is applied and additional polymer is packed into the cavity and held to compensate for the anticipated shrinkage as the polymer solidifies. The cooling takes place via the cooling channels where the polymer is cooled until a specific ejection criterion is met. Heat from the polymer is lost to the surrounding mould, a part of this heat reaches the cooling channel surfaces, which in turn exchange heat with the circulating cooling fluid. Due to the complexity of injection moulded parts and the cooling channel layout, it is difficult to achieve balanced cooling of parts. Asymmetric mould temperature distribution causes contractions of• the polymer as it cools from its melting temperature to room temperature. This results in residual stresses, which causes the part to warp after ejection. Given the understanding of the mathematical model describing the heat transfer process during the cooling stage, the objectives of this study were three fold. Firstly, an alternative numerical model for the heat transfer process was developed. The proposed model was used to investigate the cooling stress build-up during the injection moulding process.

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8

Chen, Xi. "A study on profile setting of injection molding /." View abstract or full-text, 2002. http://library.ust.hk/cgi/db/thesis.pl?CENG%202002%20CHEN.

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9

Xu, Guojung. "Study of thin-wall injection molding." Connect to this title online, 2004. http://rave.ohiolink.edu/etdc/view?acc%5Fnum=osu1078788946.

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Thesis (Ph. D.)--Ohio State University, 2004.<br>Title from first page of PDF file. Document formatted into pages; contains xxi, 238 p.; also includes graphics Includes bibliographical references (p. 231-238). Available online via OhioLINK's ETD Center

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10

Hamilton, Jordan David. "Fabrication and analysis of injection molded plastic microneedle arrays." Thesis, Georgia Institute of Technology, 2011. http://hdl.handle.net/1853/39481.

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This thesis describes the fabrication of plastic microneedle devices, their fabrication by injection molding, and analysis of the penetration mechanics. Injection molding is an economical mass-production technique that may encourage widespread adoption of microneedles for drug delivery. Four polymers were injection molded into hexagonal and square patterns of between 91 and 100 needles per array. The patterns and geometries were chosen to study the effect of needle spacing and array design on penetration force. Two needle spacings of approximately 1 mm and 1.5 mm were employed for both patterns. Molded parts showed tip radii below 15 microns, heights of 600 to 750 microns, and an included angle of approximately 30 degrees. An economic analysis performed of the injection molded polymer devices showed that they can be manufactured for approximately $0.10 - $0.179 per part, which should be low enough to gain market acceptance. The added benefits of low pain perception, improved drug delivery for certain treatments, and the possibly of being recyclable make injection molded micro-needle devices a desirable alternative to silicon or metal microneedles. Penetration tests were performed with plastic micro-needle arrays and arrays of steel needles of the same spacings and patterns. Silicone rubber with mechanical properties similar to human skin was used as a skin simulant. The results showed that the micro-needles penetrated skin to depths between 120 and 185 microns depending on pattern, spacing, tip radius and needle length. This depth is sufficient to deliver drug therapies, but not so far that they stimulate the nerve endings present beyond 130 microns inside the dermis layer in human skin. An analytical model was developed to estimate the effects of various microneedle and skin characteristics on penetration force. The model was based on literature sources and derived from test results. The model accounted for coefficient of friction, tip radius, tip angle, and needle spacing, as well as the skin mimic's mechanical properties such as elastic modulus, mode I fracture toughness, and puncture fracture toughness. A Monte Carlo simulation technique was used to correct for errors in needle length and testing angle. Comparison of the experiments to the model showed good agreement.

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11

Chin, Kwai-sang. "An expert product development system for plastic injection moulding parts /." Hong Kong : University of Hong Kong, 1996. http://sunzi.lib.hku.hk/hkuto/record.jsp?B17545857.

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12

Heuzey, Marie-Claude. "The occurrence of flow marks during injection molding of linear polyethylene." Thesis, McGill University, 1996. http://digitool.Library.McGill.CA:80/R/?func=dbin-jump-full&object_id=23745.

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Injection molding is a high rate production process for manufacturing plastic parts. There is often a conflict between good appearance and short cycle time. Injection molded parts can show several types of surface defect. It is believed that wall slip may be associated with some types of defect, because wall slip can modify the distributions of velocity, wall shear stress, pressure and heat flux. The work described here involves an experimental study of the occurrence of flow marks during injection molding of linear polyethylene, and the possible relationship between these defects and wall slip. It also involves the investigation of the feasibility of incorporating wall slip models in the 2.5D computer simulation of the injection molding process.

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13

Conley, Nancy Ann. "The dynamics of cavity pressure in thermoplastic injection molding /." Thesis, McGill University, 1985. http://digitool.Library.McGill.CA:80/R/?func=dbin-jump-full&object_id=65924.

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14

Wong, Teng. "Slicing of 3D CAD models for mould design /." Hong Kong : University of Hong Kong, 1998. http://sunzi.lib.hku.hk/hkuto/record.jsp?B19670424.

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15

Nguyen, Duoc T. "Injection molding scrap reduction a study in the relationships of plastics processing methods /." Online version, 2004. http://www.uwstout.edu/lib/thesis/2004/2004nguyend.pdf.

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16

Chang, Keh-Chyou. "Analysis Of Minimum Safe Cycle Time In Injection Molding: Selection Of Frozen Layer Thickness." Columbus, Ohio : Ohio State University, 2008. http://rave.ohiolink.edu/etdc/view?acc%5Fnum=osu1212609470.

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17

Hioe, Yunior. "Mold thermal design and quasi steady state cycle time analysis in injection molding." Connect to resource, 2006. http://rave.ohiolink.edu/etdc/view?acc%5Fnum=osu1141840509.

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18

Finniss, Adam. "A parametric study of microcellular ABS foam production in the injection molding process." Morgantown, W. Va. : [West Virginia University Libraries], 2008. https://eidr.wvu.edu/etd/documentdata.eTD?documentid=5998.

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Thesis (M.S.)--West Virginia University, 2008.<br>Title from document title page. Document formatted into pages; contains xiii, 101 p. : ill. (some col.). Includes two zip files of TIF images. Includes abstract. Includes bibliographical references (p. 93-94).

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19

Srithep, Yottha. "A study on material distribution, mechanical properties, and numerical simulation in co-injection molding." Columbus, Ohio : Ohio State University, 2008. http://rave.ohiolink.edu/etdc/view?acc%5Fnum=osu1204150909.

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20

Buys, Alexander George. "Performance evaluation of aluminium alloy 7075 for use in tool design for the plastic industry." Thesis, Cape Peninsula University of Technology, 2009. http://hdl.handle.net/20.500.11838/1246.

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Thesis (MTech (Mechanical Engineering))--Cape Peninsula University of Technology, 2009.<br>The objective of this project was to measure the performance of high-strength aluminium alloys as injection mould material compared against conventionally used tool steel.

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21

錢桂生 and Kwai-sang Chin. "An expert product development system for plastic injection moulding parts." Thesis, The University of Hong Kong (Pokfulam, Hong Kong), 1996. http://hub.hku.hk/bib/B31234732.

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22

Kaartinen, Johanna. "A Checklist for Plastic Product Design: Preventing Pitfalls in a Design Process and Premature Failures of Plastic Products." Thesis, Högskolan i Skövde, Institutionen för ingenjörsvetenskap, 2014. http://urn.kb.se/resolve?urn=urn:nbn:se:his:diva-9683.

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Designing an injection molded plastic part requires optimizing the part with respect to various stakeholders’ needs throughout its life cycle. The conditions in which a product is operating in service are often inadequately understood or specified, resulting in wrong material selection, which in turn leads to failure when the product is used. Many aspects interrelate with the initial part design and the essential rules of each should be taken into account to ensure a well-functioning plastic product. Regardless, a part design often passes sequentially from concept development to the manufacturing phase with features that unnecessarily complicate production, add costs and weaken the intended embodiment of the product. Therefore, a checklist was developed to ensure that oversights do not happen and verify that a design fulfills the requirements set for it. The commissioning company in the project was the design office Sytyte Oy. The aim of this thesis work was to investigate the effects of design decisions on the product’s feasibility and performance in service. The study focused on the underlying reasons for failures in plastic products, failure phenomena and ways of preventing them. The project started with literature research. To support the theoretical review, a small-scale survey was conducted among operators in plastic industry in Finland to strengthen the outcome of the project. The findings from the research were compiled into a checklist. The approach into the list was adopted from the FMEA method aiming to create a stripped-down version of it. The result offers a tool for anticipating and spotting possible failures by bringing up the influences that most frequently affect the part performance. It contributes to preventing delays in processing and premature failures in service. The checklist was verified by specialist consultation to receive suggestions and requirements for improvements and to ensure its reliability.

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23

Cheng, Chin-Chi 1970. "Real-time ultrasonic diagnostic technology for polymer injection molding processes." Thesis, McGill University, 2007. http://digitool.Library.McGill.CA:80/R/?func=dbin-jump-full&object_id=103371.

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Integrated high-temperature (HT) ultrasonic sensors have been developed successfully by using piezoelectric bismuth titanate and lead zirconate titanate films HT ultrasonic transducers for real-time, non-destructive, and non-intrusive diagnosis of polymer injection molding (IM) processes. The HT ultrasonic sensors can be integrated onto the barrel and/or mold of IM machine, according to the customer's requirements. These sensors can be operated up to 400°C without cooling system and ultrasonic couplant, and can be miniaturized with sufficient signal strength and signal-to-noise ratio.<br>The chosen IM processes are grouped to large- and small-scale 1M processes. The large-scale ones include conventional IM, co-injection molding (COIM), and fluid (gas/water) assisted injection molding (GAIM/WAIM). A filling incompleteness of 1 volume-% for IM of polycarbonate (PC) part, the core (PC) material movement and layers dimensions for COIM, the fluid motion, thickness and deformation of the hollowed high-density polyethylene (HDPE) part for GAIM/WAIM were diagnosed during processing by ultrasonic sensors and techniques developed.<br>The small-scale ones include IM for microfluidic device (IMMF) and micromolding (MM). The optimization of holding pressure for producing a flat polymethyl methacrylate (PMMA) part (surface roughness < 5 mum) having micro structures for IMMF, estimation of temperature of polyacetal copolymer (POM) melt in the barrel and filler concentration of nylon 66 (PA66) mixed with polyhedral oligomeric silsesquioxanes (POSS) part in the mold for MM, and evaluation of thickness variation of molded alumina ceramic powder part for MM were demonstrated. The melting stages and quality of low-density polyethylene (LDPE) in the barrel has been successfully monitored using ultrasound. The important phenomena during melting processes, such as partially melting pellets, air bubbles, melting completeness, and effects of melting temperature and rotation speed have been diagnosed by ultrasonic signatures.<br>These diagnostic results verify that the developed integrated HT ultrasonic sensors and techniques are capable of monitoring various IM processes to fabricate parts and products having complex formation, tiny size and micro structures, and evaluating the part quality in order to provide timely information for process optimization.

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24

Wen, Szu-sheng 1971. "Advances in on-line ultrasonic monitoring of injection molding process." Thesis, McGill University, 1999. http://digitool.Library.McGill.CA:80/R/?func=dbin-jump-full&object_id=29784.

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On-line ultrasonic monitoring of conventional and gas-assisted injection molding processes, and temperature measurement using ultrasound, are carried out. A technique utilizing reflection coefficients obtained by a pulse/echo technique is established to monitor the local polymer melt arrival, end of filling, pressure overshoot, solidification, part detachment, plunger retraction, and part ejection in conventional injection molding. The same technique is applied to monitor additional process parameters such as the local gas arrival, start and end of gas injection, gas penetration, and gas blow-through in gas assisted injection molding. During solidification monitoring of a high-density polyethylene part, the solidification front is observed. Also the thickness of solidified layers is determined, and its application in obtaining temperature within the molded part is demonstrated. An approach to determine the local flow front speed of the molten polymer is also proposed.<br>A high-performance buffer rod is fabricated and calibrated as a new type of ultrasonic temperature probe to measure temperature during the extrusion process. The temperature obtained using the ultrasonic technique is comparable with calibrated conventional thermocouples. Comparison between ultrasonic sensors and conventional pressure and temperature probes is also discussed in this study.

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25

Zhou, Feng. "In-mold melt-front rate control using capacitive transducer in injection molding /." View abstract or full-text, 2008. http://library.ust.hk/cgi/db/thesis.pl?CBME%202008%20ZHOU.

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26

Singh, Peter. "Molding behaviour and microstructure of injection molded short glass fiber reinforced polypropylene composites." Thesis, McGill University, 1989. http://digitool.Library.McGill.CA:80/R/?func=dbin-jump-full&object_id=74240.

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Injection molded Short Glass Fiber Reinforced Thermoplastics (SFRTP) are widely used in industry because of advantages in material properties, availability, economics and ease of processing. The thermo-mechanical history experienced by the material during processing produces significantly anisotropic microstructural and consequently mechanical properties, varying not only spatially, but directionally.<br>This work attempts to examine quantitatively various aspects of microstructure and the effect of processing conditions in SFRTP. The matrix phase properties, such as crystallinity, morphology and molecular orientation distribution, as well as the fiber phase microstructure such as concentration, length and orientation distributions have been analyzed quantitatively, and explained. Experimental techniques, including optical and electron microscopy, differential scanning calorimetry, Fourier transform infrared spectroscopy, thermo-gravimetric analysis, etc. have been used. The results indicate complex changes in microstructure from skin to core in the injection molded samples. Both matrix and fiber phase microstructures are affected by the basic thermal and flow processes that occur during the injection molding process. A first order model has been developed to predict fiber orientation distributions, which agree well with the experimental results.

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27

Crawford, Joseph Carlisle-Eric III. "Injection failure of stereolithography molds." Thesis, Georgia Institute of Technology, 2001. http://hdl.handle.net/1853/17687.

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28

McFarland, Andrew W. "Production and analysis of injection molded micro-optics components." Thesis, Georgia Institute of Technology, 2002. http://hdl.handle.net/1853/16014.

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29

Fung, Ka Tsai. "A capacitive transducer for process and quality monitoring in injection molding /." View abstract or full-text, 2006. http://library.ust.hk/cgi/db/thesis.pl?CENG%202006%20FUNGK.

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30

Hernández, Aguilar José Ramón. "Computational and experimental evaluation of two models for the simulation of thermoplastics injection molding." Thesis, National Library of Canada = Bibliothèque nationale du Canada, 2000. http://www.collectionscanada.ca/obj/s4/f2/dsk2/ftp03/MQ64224.pdf.

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31

Rafizadeh, Mehdi. "Physically-based dynamic model for the control of cavity pressure in thermoplastics injection molding." Thesis, McGill University, 1996. http://digitool.Library.McGill.CA:80/R/?func=dbin-jump-full&object_id=34433.

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The injection molding process, due to its versatility, cost effectiveness, and ability to produce precise complex articles is widely used in plastics processing. Mold cavity pressure is a good indicator of the processes taking place in the cavity and plays an important role in determining the quality of the molded articles. The dynamic modeling and control of cavity pressure, based on a physically-based approach, is studied in this research project. The work deals with the filling and packing phases.<br>A lumped physically-based model was developed in order to study the behavior of the system. The model is derived from conservation laws and incorporates a physical understanding of the process. The whole system was divided into subsystems including the hydraulic system, ram-screw, barrel, and polymer delivery system. It was found necessary to account for polymer melt elasticity as well as non-Newtonian behavior of the polymer melt flow. Consideration of the growing solid skin in the polymer delivery system was found to be necessary.<br>The dynamics of the cavity pressure during the filling phase were investigated and found to be non-linear and time-varying in relation to the hydraulic servo-valve opening which is the manipulated variable. The dynamic behavior of the cavity pressure is approximated by piece-wise linearization of the non-linear governing equations to derive a transfer function using the physically-based model which is of fifth order. Adaptive PI, PID, and IMC controllers were designed and tested for the control of the cavity pressure. Various tuning techniques, along with changes in set-point, were used to determine conservative settings for the PI and PID controllers.<br>A similar approach was used to study the dynamics of the cavity pressure during the packing phase. A sixth order transfer function, with piece-wise linearization, was derived to approximate the non-linear and time-varying behavior of the cavity pressure during packing. The adaptive PI, PID, and IMC controllers were successfully applied into the packing phase. The transition of the filling-to-packing was selected to be detected by the derivative of the cavity pressure and adaptive controllers were successfully used for this phase.<br>Two commonly used injection molding grade thermoplastics, polyethylene and polystyrene, were used in experimental part of this work for model validation and controller testing.

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32

Handlos, Agnita A. "The processing of microcomposites based on polypropylene and two thermotropic liquid crystalline polymers in injection molding, sheet extrusion, and extrusion blow molding." Diss., This resource online, 1994. http://scholar.lib.vt.edu/theses/available/etd-06062008-164735/.

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33

Wong, Ho Yin. "A capacitive transducer for solidification rate monitoring of polymer in injection molding /." View abstract or full-text, 2007. http://library.ust.hk/cgi/db/thesis.pl?CENG%202007%20WONG.

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34

Kim, Nam Hyung. "INJECTION-COMPRESSION AND CO-INJECTION MOLDINGS OF AMORPHOUS POLYMERS: VISCOELASTIC SIMULATION AND EXPERIMENT." Akron, OH : University of Akron, 2009. http://rave.ohiolink.edu/etdc/view?acc%5Fnum=akron1230065091.

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Dissertation (Ph. D.)--University of Akron, Dept. of Polymer Engineering, 2009.<br>"May, 2009." Title from electronic dissertation title page (viewed 11/27/2009) Advisor, Avraam I. Isayev; Committee members, James L. White, Erol Sancaktar, Kevin Kreider, Minel J. Braun; Department Chair, Sadhan C. Jana; Dean of the College, Stephen Cheng; Dean of the Graduate School, George R. Newkome. Includes bibliographical references.

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35

McFarland, Andrew W. "Production and Analysis of Polymeric Microcantilever Parts." Diss., Georgia Institute of Technology, 2004. http://hdl.handle.net/1853/4895.

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This dissertation presents work involving the manufacture and analytic modeling of microcantilever parts (length-width-thickness of roughly 500-100-10 microns). The manufacturing goals were to devise a means for and demonstrate repeatable production of microcantilevers from techniques not used in the integrated-circuit field, which are the exclusive means of current microcantilever production. The production of microcantilevers was achieved via a solvent casting approach and with injection molding, which produced parts from various thermoplastic polymeric materials (amorphous, semi-crystalline, fiber- and nanoclay-filled) in a repeatable fashion. Limits of the injection molding process in terms of the thinnest cantilevers possible were examined with 2 microns being the lower bound. Subsets of the injection-molded parts were used in a variety of sensing applications, some results were successful (e.g., vapor-phase, resonance- and deflection-based sensing), while others showed poor results, likely due to experimental shortcomings (e.g., fluid-phase, deflection-based sensing). Additionally, microcantilever parts with integrated tips were injection-molded and showed to function at the same level as commercial, tipped, silicon-nitride parts when imaging an optical grating; this experimental work was the first demonstration of injection-molded parts for chemical sensing and force spectroscopy. The scientific results were (i) the derivation of a length scale dependent bending stiffness and experimental evidence showing that such an effect was observed, (ii) the development of a new microcantilever experimental mode (surface stress monitoring via microcantilever bending resonant frequencies) and experimental validation of the technique, and (iii) a new method for determining microcantilever geometry based upon measurement of a bending, lateral, and torsional mode and experimental validation of the procedure.

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36

Nalla, Ajit R. "Closed-loop flow control approaches for VARTM." Access to citation, abstract and download form provided by ProQuest Information and Learning Company; downloadable PDF file 2.86 Mb., 89 p, 2006. http://gateway.proquest.com/openurl?url_ver=Z39.88-2004&res_dat=xri:pqdiss&rft_val_fmt=info:ofi/fmt:kev:mtx:dissertation&rft_dat=xri:pqdiss:1430781.

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37

Shek, Ka To. "Hot embossing-injection molding and puncture characterization of polymer hypodermic needle /." View abstract or full-text, 2007. http://library.ust.hk/cgi/db/thesis.pl?MECH%202007%20SHEK.

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38

Jangha, Sundiata. "The development of an ejection mechanism design synthesis system for rapid injection molding tools." Thesis, Georgia Institute of Technology, 2001. http://hdl.handle.net/1853/16389.

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39

Palmer, Anne Elizabeth. "The effect of feature geometry on the life of stereolithography molds." Thesis, Georgia Institute of Technology, 1999. http://hdl.handle.net/1853/18385.

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40

黃挺 and Teng Wong. "Slicing of 3D CAD models for mould design." Thesis, The University of Hong Kong (Pokfulam, Hong Kong), 1998. http://hub.hku.hk/bib/B29875122.

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41

Cao, Bin. "On-line ultrasonic monitoring of injection molding and die casting processes." Thesis, National Library of Canada = Bibliothèque nationale du Canada, 1996. http://www.collectionscanada.ca/obj/s4/f2/dsk3/ftp04/MQ44084.pdf.

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42

Farhoudi, Yalda. "Measurement and computation of thermal stresses in injection molding of amorphous and crystalline polymers." Thesis, National Library of Canada = Bibliothèque nationale du Canada, 1998. http://www.collectionscanada.ca/obj/s4/f2/dsk1/tape11/PQDD_0018/NQ44426.pdf.

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43

Ličko, Ľubomír. "Zařízení pro vstřikování plastů." Master's thesis, Vysoké učení technické v Brně. Fakulta strojního inženýrství, 2016. http://www.nusl.cz/ntk/nusl-241717.

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This thesis is focused on design of equipment for injection molding. The work discusses current state of technology for injection molding. In the work is conducted structural design of horizontal injection press for plastics processing with horizontal closing movement. Injection molding machine is designed to form the parting plane of maximum dimension 350 x 350 mm.

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44

Bast, Felix. "Feasibility study and optimization of the design of an injection molded plastic bike frame." Thesis, Georgia Institute of Technology, 1996. http://hdl.handle.net/1853/20948.

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45

Joubert, Francois. "Rapid Tooling and the LOMOLD Process." Thesis, Link to the online version, 2005. http://hdl.handle.net/10019/1078.

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Dawson, Evan Kent. "The effect of rapid tooling on final product properties." Diss., Georgia Institute of Technology, 2001. http://hdl.handle.net/1853/11877.

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47

Brhel, Michal. "Technologie výroby tělesa konektoru z recyklátu." Master's thesis, Vysoké učení technické v Brně. Fakulta strojního inženýrství, 2016. http://www.nusl.cz/ntk/nusl-241178.

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Study developed during the Master's degree studies of Mechanical Engineering deals with the use of recycled plastic in the injection molding and its influence on the mechanical properties of the mold. Examined product is used in the automotive industry as a connector body. The housing is manufactured from a plastic material, polyamide. The annual production volume of 3 000 000 pieces. According to tests specified in standard USCAR2 regrind influence on mechanical properties and dimensions was evaluated. After the technical evaluation of the project, research was also judged from economic point of view. In this task, savings with the different content of the recycled material during production was calculated. The final chapters justify change of properties and they are proposing the use of recycled materials in practice.

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48

Sanchez, Urbina Israel. "Optimizing flow of plastic PBT with 45% glass and mineral fiber reinforcement in an injection over mold process using Taguchi, CPk and mold flow simulation software approaches." To access this resource online via ProQuest Dissertations and Theses @ UTEP, 2009. http://0-proquest.umi.com.lib.utep.edu/login?COPT=REJTPTU0YmImSU5UPTAmVkVSPTI=&clientId=2515.

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49

Hung, Wai-chi. "The flow of polymer melts in the mould in injection moulding /." [Hong Kong : University of Hong Kong], 1991. http://sunzi.lib.hku.hk/hkuto/record.jsp?B13206187.

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Yu, Liyong. "Experimental and numerical analysis of injection molding with microfeatures." Columbus, Ohio : Ohio State Uniersity, 2004. http://rave.ohiolink.edu/etdc/view?acc%5Fnum=osu1080318678.

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Abstract:

Thesis (Ph. D.)--Ohio State University, 2004.<br>Title from first page of PDF file. Document formatted into pages; contains xvi, 202 p.; also includes graphics (some col.). Includes abstract and vita. Advisor: Kurt W. Koelling, Dept. of Chemical Engineering. Includes bibliographical references (p. 196-202).

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