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Wyszukujesz frazę "injection molding" wg kryterium: Temat


Wyświetlanie 1-11 z 11
Tytuł:
Influence of polylactide modification with blowing agents on selected mechanical properties
Autorzy:
Tor-Świątek, A.
Garbacz, T.
Sedlarik, V.
Stloukal, P.
Kucharczyk, P.
Powiązania:
https://bibliotekanauki.pl/articles/103201.pdf
Data publikacji:
2017
Wydawca:
Stowarzyszenie Inżynierów i Techników Mechaników Polskich
Tematy:
polylactide
blowing agent
extrusion
injection molding
Opis:
The article presents research of modification of PLA with four types of blowing agents with a different decomposition characteristic. Modifications were made in both cellular extrusion and injection molding processes. The obtained results show that dosing blowing agents have the influence on mechanical properties and structure morphology. Differences in the obtained results are also visible and significant between cellular processes.
Źródło:
Advances in Science and Technology. Research Journal; 2017, 11, 4; 206-214
2299-8624
Pojawia się w:
Advances in Science and Technology. Research Journal
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
The Optimization of PHBV-hemp Fiber Biocomposite Manufacturing Process on the Selected Example
Autorzy:
Frącz, Wiesław Jan
Janowski, Grzegorz
Bąk, Łukasz
Powiązania:
https://bibliotekanauki.pl/articles/2024015.pdf
Data publikacji:
2021
Wydawca:
Stowarzyszenie Inżynierów i Techników Mechaników Polskich
Tematy:
optimization
injection molding
PHBV
biocomposites
hemp fibers
Opis:
In this work, a modern biocomposite on the base of poly(3-hydroxybutyrate-co-3-hydroxyvalerate) matrix commonly known as PHBV was produced in the extrusion process, containing 30% by weight of hemp fibers. The use of the above-mentioned filler allowed to reduce the producing costs of the composite material compared to pure PHBV, improving, among others, some mechanical properties of products made of this biocomposite while maintaining full biodegradation. The obtained biocomposite can be successfully used for the production of injection molded products, but its processing properties are not yet fully known and consequently it is difficult to obtain the optimal performance properties of the products. As part of this study, the process of optimization of the production process of products from the PHBV-hemp fiber biocomposite was carried out on the example of samples intended for testing in the uniaxial tensile test. By using orthogonal planes, widely used in optimization process, the required number of injection molding tests was reduced. Input data values were determined by the factorial planning method that is commonly used in designing experiments. The calculations were carried out in the Minitab 18 software. Six controlling factors were used in the analyzes, each of which was subject to changes on three levels. When selecting the range of controlling factors, it was initially assumed that for all assumed levels of variability it must be possible to fill the mold cavity completely. The orthogonal plan of the L27 type was used in the research. For the purposes of the method, an orthogonal table was built containing 27 combinations of parameters subject to optimization. Optimization was undertaken for two main criteria: shrinkage of the ,,dog-bone” samples (primary and secondary volumetric shrinkage), mechanical properties (Young's modulus, tensile strength, elongation at break). By means of Taguchi method, a significant improvement of some product mechanical properties made of biocomposite was noted and the effective reduction of the processing shrinkage was observed.
Źródło:
Advances in Science and Technology. Research Journal; 2021, 15, 2; 127-137
2299-8624
Pojawia się w:
Advances in Science and Technology. Research Journal
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Assessment of the resistance to external factors of low-density polyethylene modified with natural fillers
Autorzy:
Głogowska, K.
Majewski, Ł.
Gajdoš, I.
Mitaľ, G.
Powiązania:
https://bibliotekanauki.pl/articles/102811.pdf
Data publikacji:
2017
Wydawca:
Stowarzyszenie Inżynierów i Techników Mechaników Polskich
Tematy:
natural filler
low-density polyethylene
injection molding
Opis:
The study reports the results of investigation of basic processing and thermal properties of low-density polyethylene modified with two types of natural filler: wheat bran and pumpkin seed hulls, their content ranging from 5% to 15% relative to the matrix. In addition, physical properties of the produced granulates are determined, i.e. the relationship between their density and the applied contents of the tested fillers. Furthermore, the study reports the results concerning longitudinal shrinkage, abrasion resistance and cold water absorption of injection molded tensile specimens.
Źródło:
Advances in Science and Technology. Research Journal; 2017, 11, 4; 35-40
2299-8624
Pojawia się w:
Advances in Science and Technology. Research Journal
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Research on the content and filler type on injection shrinkage
Autorzy:
Jachowicz, T.
Gajdoš, I.
Krasinskyi, V.
Powiązania:
https://bibliotekanauki.pl/articles/102398.pdf
Data publikacji:
2014
Wydawca:
Stowarzyszenie Inżynierów i Techników Mechaników Polskich
Tematy:
polymer processing
injection molding
shrinkage
filler
composite injection-molded part
Opis:
The paper presents the phenomenon of injection shrinkage. The definition of shrinkage and shrinkage types are presented. The main factors affecting shrinkage value of injection-molded part are discussed. Based on the experimental tests conducted using injection-molded parts made from polypropylene filled with glass fiber and talc, the dependence of injection-molded part shrinkage on filler content and selected parameters of the injection molding process has been determined.
Źródło:
Advances in Science and Technology. Research Journal; 2014, 8, 23; 6-13
2299-8624
Pojawia się w:
Advances in Science and Technology. Research Journal
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Analysis of fiber orientation in the wood-polymer composites (WPC) on selected examples
Autorzy:
Frącz, W.
Janowski, G.
Powiązania:
https://bibliotekanauki.pl/articles/103384.pdf
Data publikacji:
2017
Wydawca:
Stowarzyszenie Inżynierów i Techników Mechaników Polskich
Tematy:
fiber orientation
injection molding
numerical simulations
wood-polymer composites
Opis:
The fibers orientation in the polymer matrix is an important factor determining mechanical properties of products made of composites by means of an injection molding process. The fibers arrangement has an effect on shrinkage of the composite and the dimensional accuracy of molded piece. The knowledge of fiber orientation can determine the proper dimensions and design of the molding cavities and then correct some of physical and mechanical properties of the molded piece. The orientation of fillers depends on many factors, among which the important role play processing parameters including the injection speed. The aim of this study was to assess the orientation of the fibers in wood-polymer composite on the selected examples. The knowledge and proper use of micromechanical models allow to evaluate the fibers flow and their orientation in polymer matrix. The research was performed both for numerical simulations and experimental studies for results verification.
Źródło:
Advances in Science and Technology. Research Journal; 2017, 11, 3; 122-129
2299-8624
Pojawia się w:
Advances in Science and Technology. Research Journal
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Properties of moldings prepared from LDPE-pumpkin seed hulls blend
Autorzy:
Głogowska, K.
Sikora, J.
Dulebova, L.
Powiązania:
https://bibliotekanauki.pl/articles/102641.pdf
Data publikacji:
2017
Wydawca:
Stowarzyszenie Inżynierów i Techników Mechaników Polskich
Tematy:
natural filler
low-density polyethylene
pumpkin seed hulls
injection molding
Opis:
In recent decades, standard polymer blends for different applications have been more and more often replaced by blends containing raw materials. The use of natural materials as filler in thermoplastics brings both economic and environmental benefits. The use of a given vegetable filler depends on the geographic location and natural occurrence of the vegetables in a given geographic region. In Poland, for instance, the pumpkin is one of such vegetables. They are used for producing oil which is pressed from pumpkin seeds. Pumpkin seeds are then collected, dried and purified to produce waste material in hull form. Particles of ground pumpkin seed hulls with varying sizes and weight-in-weight concentration ranging from 0% to 20% relative to the matrix are used as filler in low-density polyethylene. Pumpkin seed hulls are ground and sieved. Four fractions of hulls with different particle sizes are produced: <0.2 mm, 0.2-0.4 mm, 0.4-0.6 mm, 0.6-0.8 mm. The paper reports the results of investigation of the mechanical properties, i.e., strength properties determined by static tensile testing and hardness measurement, of injection molds produced at constant processing parameters. In addition, the cross sections of the obtained products are subjected to microscopic examination. Relationships are determined between tensile modulus, maximum tensile stress, tensile stress at yield, maximum tensile strain, tensile strain at yield as well as Shore hardness and weigh-in-weight concentration of the powdered natural filler and its grain sizes. Finally, relevant conclusions are drawn.
Źródło:
Advances in Science and Technology. Research Journal; 2017, 11, 4; 318-325
2299-8624
Pojawia się w:
Advances in Science and Technology. Research Journal
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Effectiveness of cellular injection molding process
Autorzy:
Garbacz, T.
Dulebova, L.
Krasinskyi, V.
Powiązania:
https://bibliotekanauki.pl/articles/103059.pdf
Data publikacji:
2013
Wydawca:
Stowarzyszenie Inżynierów i Techników Mechaników Polskich
Tematy:
thermoplastics polymers
cellular injection molding process
blowing agents
physical properties
Opis:
In a study of cellular injection, molding process uses polyvinylchloride PVC. Polymers modified with introducing blowing agents into them in the Laboratory of the Department of Technologies and Materiase of Technical University of Kosice. For technological reasons, blowing agents have a form of granules. In the experiment, the content of the blowing agent (0–2,0% by mass) fed into the processed polymer was adopted as a variable factor. In the studies presented in the article, the chemical blowing agents occurring in the granulated form with a diameter of 1.2 to 1.4 mm were used. The view of the technological line for cellular injection molding and injection mold cavity with injection moldings are shown in figure 1. The results of the determination of selected properties of injection molded parts for various polymeric materials, obtained with different content of blowing agents, are shown in Figures 4–7. Microscopic examination of cross-sectional structure of the moldings were obtained using the author’s position image analysis of porous structure. Based on analysis of photographs taken (Figures 7–9) it was found that the coating containing 1.0% of blowing agents is a clearly visible solid outer layer and uniform distribution of pores and their sizes are similar.
Źródło:
Advances in Science and Technology. Research Journal; 2013, 7, 18; 74-80
2299-8624
Pojawia się w:
Advances in Science and Technology. Research Journal
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Etykietowanie - metoda wytwarzania elementów z tworzyw o specjalnych cechach powierzchni
Labeling - method of production of plastic parts with special surface properties
Autorzy:
Jachowicz, T.
Krasinskyi, V.
Powiązania:
https://bibliotekanauki.pl/articles/395366.pdf
Data publikacji:
2011
Wydawca:
Stowarzyszenie Inżynierów i Techników Mechaników Polskich
Tematy:
przetwórstwo tworzyw
wtryskiwanie
etykietowanie w formie
polymer processing
injection molding
In-Mold Labeling
Opis:
W artykule przedstawiono informacje na temat jednej ze specjalnych metod wtryskiwania, jakim jest wtryskiwanie z etykietowaniem w formie. Scharakteryzowano podstawy tej metody przetwórstwa i omówiono jej odmiany, uwzględniające różne sposoby pobierania i pozycjonowania etykiet w gnieździe formującym formy wtryskowej. Przedstawiono budowę stanowiska technologicznego do wtryskiwania z etykietowaniem w formie i wymieniono maszyny i urządzenia wchodzące w jego skład. Omówiono najważniejsze zalety i wady tej metody wtryskiwania oraz najważniejsze obszary zastosowania otrzymywanych przy jej pomocy wyprasek.
General information about one of special methods of injection molding, such as In-Mold Labeling have been presented in this article. Principles of this polymer processing method have been characterized. Also different ways of taking and positioning the labels into the mold have been described. Construction's details of injection station using In-Mold Labeling method have been presented also necessary machines and devices have been showed. Most important advantages and disadvantages of In-Mold Labeling method have been described as well with most important areas of application of plastic parts manufactured by this special method of injection molding.
Źródło:
Postępy Nauki i Techniki; 2011, 8; 201-210
2080-4075
Pojawia się w:
Postępy Nauki i Techniki
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Wtórne wykorzystywanie recyklatów kopolimerów jonomerowych E/MAA uzyskanych przez rozdrobnienie w obniżonej temperaturze
Secondary use of ionomeric recyclate E/MAA obtained by grinding at low temperature
Autorzy:
Sykutera, D.
Bieliński, M.
Czyżewski, P.
Kościuszko, A.
Powiązania:
https://bibliotekanauki.pl/articles/2073030.pdf
Data publikacji:
2016
Wydawca:
Stowarzyszenie Inżynierów i Techników Mechaników Polskich
Tematy:
kopolimery monomerowe
recykling
recyklat
wtryskiwanie
transmisyjność
ionomeric copolymers
recycling
recyclate
injection molding
transmissivity
Opis:
Przedstawiono sposób zagospodarowania odpadów kopolimeru jonomerowego (E/MAA) pod nazwą handlową Surlyn® (Du-Pont). Prezentowane wyniki badań stanowią istotny fragment prac nad zagospodarowaniem odpadów jonomerowych, powstałych podczas produkcji grubościennych nasadek kosmetycznych. Zaproponowano taki sposób realizacji wtórnego przetwórstwa, który zapewnia uzyskanie transmisyjności i wybranych właściwości mechanicznych wyprasek na podobnym poziomie jak wytworzone z oryginalnego granulatu (up-cycling). Wykazano, że schłodzenie nadawy przed rozdrobnieniem nie ma istotnego wpływu na transmisyjność, wytrzymałość na rozciąganie oraz udarność wyprasek wtórnych.
The way of ionomeric copolymer (E/MAA) recycling under the trade name Surlyn® (DuPont) is presented. Results of investigations constitute a crucial part of the research concerning management of ionomeric waste, being by-products of the production of thick-walled cosmetic caps. The proposed type of secondary process ensures that the injection parts obtain transmissivity and chosen mechanical properties similar to those of moldings from original pellets (upcycling). It was also proved that feed cooling before the grinding does not have a significant influence on transmissivity, tensile strength and impact strength of mol-dings made from recycled material.
Źródło:
Inżynieria i Aparatura Chemiczna; 2016, 3; 110--111
0368-0827
Pojawia się w:
Inżynieria i Aparatura Chemiczna
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Charakterystyka metod wtryskiwania do zastosowań medycznych
Characteristic of injection molding method in medical applications
Autorzy:
Klepka, T.
Zgierski, P.
Powiązania:
https://bibliotekanauki.pl/articles/395368.pdf
Data publikacji:
2011
Wydawca:
Stowarzyszenie Inżynierów i Techników Mechaników Polskich
Tematy:
przetwórstwo tworzyw sztucznych
wtryskiwanie
układ uplastyczniający
medycyna
polymer processing
injection molding
plasticizing system
medicine
Opis:
W artykule przedstawiono charakterystykę i możliwości wykorzystania metody przetwórstwa tworzyw polimerowych do zastosowań medycznych. Dokonano porównań różnych sposobów uplastyczniania na przykładzie wtryskiwania, ilustrując wady i zalety każdego z nich. Przedstawiono wpływ rodzaju materiału formy wtryskowej na jakość wypraski oraz przykłady maszyn przetwórczych do wytwarzania wyprasek stosowanych w protetyce.
The article presents the characteristics and possibilities of using polymer processing methods for medical applications. There have been comparisons of different ways of plasticization on the example of the injection, illustrating the advantages and disadvantages of each. Shows the effect of the type of mold material on the molded part quality, and examples of processing machinery for the manufacture of molded parts used in dental systems.
Źródło:
Postępy Nauki i Techniki; 2011, 8; 192-200
2080-4075
Pojawia się w:
Postępy Nauki i Techniki
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
The Effect of Ageing on Selected Properties of Polylactide Modified with Blowing Agents
Autorzy:
Głogowska, Karolina
Majewski, Łukasz
Garbacz, Tomasz
Tor-Świątek, Aneta
Powiązania:
https://bibliotekanauki.pl/articles/102787.pdf
Data publikacji:
2019
Wydawca:
Stowarzyszenie Inżynierów i Techników Mechaników Polskich
Tematy:
injection molding
ageing of polymers
polylactide (PLA)
biodegradable polymers
blowing agents
formowanie wtryskowe
starzenie polimerów
polilaktyd (PLA)
polimery biodegradowalne
środki porotwórcze
Opis:
The modification of processing and functional properties of polymeric materials is widely used in polymer processing. The current progress in this field involves the introduction of new ways of modifying polymers, often by changing their structure from homogeneous to porous. As a result, these polymers have lower density, and thus modified processing and functional properties. The paper presents the results of a study on the selected properties of the injection-molded specimens of polylactide (PLA) modified with blowing agents, before and after thermal ageing. Blowing agents with exothermic (Hydrocerol 530) and endothermic decomposition (Hydrocerol ITP-810, Expancel 951 MB 120 and LyCell F-017) were used. The mass content of the blowing agents was changed in the range from 0.5% to 3%. The study involved examination of the changes in properties such as Young’s modulus, tensile strength, tensile stress, strain at maximum tensile stress, Vicat softening temperature and impact strength depending on the mass content and type of blowing agent before and after the ageing process.
Źródło:
Advances in Science and Technology. Research Journal; 2019, 13, 4; 204-213
2299-8624
Pojawia się w:
Advances in Science and Technology. Research Journal
Dostawca treści:
Biblioteka Nauki
Artykuł
    Wyświetlanie 1-11 z 11

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