Materiale Plastice最新文献_第5页

Research on the Lifting Forces of Industrial Plastic Vacuum Cups 工业塑料真空杯提升力的研究

IF 0.8 4区材料科学

Materiale Plastice Pub Date : 2023-04-05 DOI: 10.37358/mp.23.1.5647

S. Ravai-Nagy, L. Butnar

{"title":"Research on the Lifting Forces of Industrial Plastic Vacuum Cups","authors":"S. Ravai-Nagy, L. Butnar","doi":"10.37358/mp.23.1.5647","DOIUrl":"https://doi.org/10.37358/mp.23.1.5647","url":null,"abstract":"\u0000Industrial vacuum cups are used for lifting, holding and moving a wide variety of automated applications for handling semi-finished products and parts made of a wide range of materials - metal, glass, plastic, paper, wood, etc. and are used in a variety of industries. This paper presents some of the authors theoretical and experimental research on the maximum lifting force that different types of vacuum cups can achieve. The study was carried out on the basis of sizing recommendations made by manufacturers and dealers of these types of vacuum cups. The specially designed experimental stand was installed on the universal material testing machine LBG 100 kN and allowed the practical determination of these lifting forces provided by various types of industrial vacuum cups. Lifting force measurements were carried out with the AXIS FB 1k digital dynamometer attached to the machine. Vacuum cups of 3 different shapes and made of 3 different materials were used, using different vacuum depressions - 0.3 bar, -0.5 bar, -0.7 bar and -0.9 bar. The research aimed to determine by measurement the maximum lifting force of these types of vacuum cups applied to steel parts. The results obtained for these forces were compared with the calculated theoretical values, with the manufacturer�s recommended dimensioning values, and comparative conclusions were also drawn on the maximum lifting force provided by the different types of industrial vacuum cups studied.\u0000","PeriodicalId":18360,"journal":{"name":"Materiale Plastice","volume":" ","pages":""},"PeriodicalIF":0.8,"publicationDate":"2023-04-05","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"41592452","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"材料科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 1

The Importance and Necessity of New Bio-Based Materials in Industrial Design 新型生物基材料在工业设计中的重要性和必要性

IF 0.8 4区材料科学

Materiale Plastice Pub Date : 2023-04-05 DOI: 10.37358/mp.23.1.5651

A. Avramescu

{"title":"The Importance and Necessity of New Bio-Based Materials in Industrial Design","authors":"A. Avramescu","doi":"10.37358/mp.23.1.5651","DOIUrl":"https://doi.org/10.37358/mp.23.1.5651","url":null,"abstract":"\u0000Main goals like technical innovation, costs and respect for the environment urge us to discover finer, lighter, biodegradable, and more �intelligent� materials in their functionality. The development of industrial design is motivated by criteria such as the environment, sustainability, the need for lightweight products, manufactured with fewer components and integrating various functions. As experts in new materials and technologies for the development of innovative products, we work closely with international research institutes as part of our projects. We want to create materials that combine such properties in the most efficient way, interacting with their close environment and the environment in general and, based on their features, to be transformed through various processes in completely different materials. The goal of our work is to compare different existing materials with a new bio-based material using quantifiable measurement indicators and sensory measurement indicators. The purpose of this article is to provide a few elements that can be used as a guide in establishing a quantitative impact assessment strategy based on the use of sensory evaluation techniques. In the framework of our presentation, we will focus mostly on comparing the materials via a metrological tool for quantifying tactile characteristics likely to be correlated to the ground truth that constitutes a sensory profile.\u0000","PeriodicalId":18360,"journal":{"name":"Materiale Plastice","volume":" ","pages":""},"PeriodicalIF":0.8,"publicationDate":"2023-04-05","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"48604414","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"材料科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 1

Study on the Use of Digital Technology in the Realization of Prosthetic Restorations 数字技术在假肢修复中的应用研究

IF 0.8 4区材料科学

Materiale Plastice Pub Date : 2023-04-05 DOI: 10.37358/mp.23.1.5648

A. Popescu, A. Cojocaru

{"title":"Study on the Use of Digital Technology in the Realization of Prosthetic Restorations","authors":"A. Popescu, A. Cojocaru","doi":"10.37358/mp.23.1.5648","DOIUrl":"https://doi.org/10.37358/mp.23.1.5648","url":null,"abstract":"\u0000The use of digital technology has become a useful and also a preferred process in the realization of dental prosthetic restorations, because through it, superior quality dental prostheses are obtained in terms of aesthetics, accuracy of execution and durability. CAD/CAM technology is changing all aspects of dentistry, making dental restoration processes much easier and more efficient for dentists, patients and dental technicians. The materials that can be used to manufacture dental restorations designed using Exocad software depend on the type of restoration (crowns, bridges, veneers, etc.) and the manufacturing method (milling with a 3-, 4-, or 5-axis CAM device); available materials include: PMMA (polymethyl methacrylate) and zirconia. Using digital technology, in this study we performed 6 fixed prosthetic restorations, of which 5 unidental restorations (5 dental crowns) and 1 pluridental restoration (a 4-element dental bridge); of the 6 prosthetic restorations, 3 restorations will be fixed by cementing on dental abutments, and 3 restorations will be fixed by screwing on implants. Digital technology allows the use of higher quality materials, resulting in more resistant and more aesthetic prosthetic restorations; helps reduce the occurrence of errors; obtaining a better marginal adaptation and a perfect adaptation to the anatomical structures of the patient s teeth.\u0000","PeriodicalId":18360,"journal":{"name":"Materiale Plastice","volume":" ","pages":""},"PeriodicalIF":0.8,"publicationDate":"2023-04-05","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"46486357","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"材料科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Synthesis and Preliminary Characterization of Polyurethane Matrices Used as a Drug Carrier for Bromelain 菠萝蛋白酶药物载体聚氨酯基质的合成及初步表征

IF 0.8 4区材料科学

Materiale Plastice Pub Date : 2023-04-05 DOI: 10.37358/mp.23.1.5639

I. Tuta-Sas, F. Borcan, I. Sas

{"title":"Synthesis and Preliminary Characterization of Polyurethane Matrices Used as a Drug Carrier for Bromelain","authors":"I. Tuta-Sas, F. Borcan, I. Sas","doi":"10.37358/mp.23.1.5639","DOIUrl":"https://doi.org/10.37358/mp.23.1.5639","url":null,"abstract":"\u0000Bromelain, a natural substance sourced from pineapples, was found effective in various colds, in preventing heart attack and respectively in excess weight. On the other hand, it is well-known that pineapples juice increases the gastric acidity and respectively the people with hemophilia, internal bleeding must also be very careful in consuming this fruit. The objectives of this study were to obtain and to characterize a drug delivery system used for the transmembrane transfer of bromelain. The samples based on polyurethane matrices with and respectively without bromelain were synthesized and characterized by measurements of pH, encapsulation efficacy, cumulative drug release in a degradative media and in simulated gastric acid, electron microscopy and by modern techniques such as Zetasizer, cytotoxicity assay, and various non-invasive skin irritation assessment. The results indicate the obtaining of polyurethane matrices with mean sizes between 322-342 nm and neutral pH, that have a medium stability against the clusters formation tendency and a medium drug release rate. The non-irritative potential and the results on their cytotoxicity are important evidences that can be used for the further clinical trials of the polyurethane carriers.\u0000","PeriodicalId":18360,"journal":{"name":"Materiale Plastice","volume":" ","pages":""},"PeriodicalIF":0.8,"publicationDate":"2023-04-05","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"42367878","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"材料科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 1

Impact Behavior Analysis of 3-D Printed Honeycomb Structures 3d打印蜂窝结构的冲击性能分析

IF 0.8 4区材料科学

Materiale Plastice Pub Date : 2022-10-03 DOI: 10.37358/mp.22.3.5607

C. Stoica, R. Maier, A. Istrate, Sebastian Bucaciuc, Alexandra Despa

{"title":"Impact Behavior Analysis of 3-D Printed Honeycomb Structures","authors":"C. Stoica, R. Maier, A. Istrate, Sebastian Bucaciuc, Alexandra Despa","doi":"10.37358/mp.22.3.5607","DOIUrl":"https://doi.org/10.37358/mp.22.3.5607","url":null,"abstract":"\u0000The purpose of this paper is to evaluate the behaviour of 3D printed honeycomb structures under low velocity impact loading for their use in energy absorption applications. Additive manufacturing technologies are part of a growing field that represents high interest for industries such as aerospace, automotive and naval. This paper aims to determine the mechanical properties of a 3D printed polymer - Polylactic Acid (PLA) manufactured by FDM (Fused Deposition Modelling) technology. In this regard, first the material is characterized by low velocity impact dynamic experimental tests. A finite Element Analysis (FEA) is performed in LS-Dyna software in order to validate the results. The samples were manufactured by varying the infill percent to investigate the influence of different parameters on a batch of samples for every configuration. The 3D CAD modelling for impact tests samples were performed in Catia V5. Among wide range of cellular structures, honeycomb non-auxetic hexagonal cell pattern was selected in this study, assuring high strength/weight ratio. The amount of energy absorbed during the impact, the failure and degradation of the impacted specimens were monitored, following the analysis of experimental and numerical data. A fair agreement was obtained between experimental and numerical results, showing that honeycomb developed lightweight structures exhibits a proper energy absorption capacity, with a mechanism of release similar to metal or composite materials honeycombs.\u0000","PeriodicalId":18360,"journal":{"name":"Materiale Plastice","volume":" ","pages":""},"PeriodicalIF":0.8,"publicationDate":"2022-10-03","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"45426062","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"材料科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Asbestos-Free Brake Lining Material Using Sea Shell 使用Sea Shell的无石棉制动衬片材料

IF 0.8 4区材料科学

Materiale Plastice Pub Date : 2022-10-03 DOI: 10.37358/mp.22.3.5609

Vijayasankar Vinayak Arun Sankar, P. Suresh

{"title":"Asbestos-Free Brake Lining Material Using Sea Shell","authors":"Vijayasankar Vinayak Arun Sankar, P. Suresh","doi":"10.37358/mp.22.3.5609","DOIUrl":"https://doi.org/10.37358/mp.22.3.5609","url":null,"abstract":"\u0000Due to the extreme health concerns associated with asbestos-based brake linings, researchers are looking at using ecologically friendly bio-based biomaterials as reinforcing agents in composite materials used to make brake pad linings. The goal of this study is to see whether using sea shell (SS) powder in the production of asbestos-free brake lining materials is feasible. The powders were combined with the necessary fillers to make the brake lining. The reinforcing powders compositions were varied between 20% and 35%, the resin binder s composition was changed between 58 and 43 percent, and the filler metal and curing agents compositions were kept constant. These ingredients were weighed, prepared, combined, cured, and moulded. The composite materials were tested for water and oil absorption, compressive strength, hardness, and wear. According to the findings, increasing the quantity of reinforcing components increases the water and oil absorption of the samples. With the addition of up to 35% content, the composite s compressive strength increased proportionally. The tested coefficient of friction was found to be within acceptable limits. Furthermore, when mixed with other fillers and restricted, SS powder has showed tremendous promise in the production of brake linings.\u0000","PeriodicalId":18360,"journal":{"name":"Materiale Plastice","volume":" ","pages":""},"PeriodicalIF":0.8,"publicationDate":"2022-10-03","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"49570701","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"材料科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Theoretical Prediction of Two-Peak Behavior of GFRP-Reinforced Concrete Compressive Members gfrp -钢筋混凝土受压构件双峰性能的理论预测

IF 0.8 4区材料科学

Materiale Plastice Pub Date : 2022-10-03 DOI: 10.37358/mp.22.3.5604

M. H. E. Ouni, A. Raza, Muhammad Arshad

{"title":"Theoretical Prediction of Two-Peak Behavior of GFRP-Reinforced Concrete Compressive Members","authors":"M. H. E. Ouni, A. Raza, Muhammad Arshad","doi":"10.37358/mp.22.3.5604","DOIUrl":"https://doi.org/10.37358/mp.22.3.5604","url":null,"abstract":"\u0000The use of fiber-reinforced polymer (FRP) composites in compressive members is advantageous to reinforced concrete structures in order to alleviate the problem of corrosion of steel reinforcement and to produce a lightweight and efficient structural element. This investigation aims to propose the theoretical models for capturing the axial loading capacity (ALC) of hollow concrete columns (HCCs) having main FRP rebars and transverse FRP spirals. All the glass-FRP-reinforced HCCs portray two-peak load performance. The first peak is due to the gross cross-sectional area of concrete while the second peak is due to the core material laterally wrapped with FRP spirals. For the prediction of the first peak load of HCCs which is equal to the maximum capacity of solid concrete columns, a database of 279 FRP-reinforced columns was produced from the previous research and the ALC models were suggested; one for capturing the first peak and the other for estimating the second peak ALC of HCCs. The predictions of proposed models were compared with the test results from the literature. A close relationship was perceived between the theoretical and experimental results.\u0000","PeriodicalId":18360,"journal":{"name":"Materiale Plastice","volume":" ","pages":""},"PeriodicalIF":0.8,"publicationDate":"2022-10-03","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"44540961","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"材料科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Design of Melamine Foam/perforated Plates Composite Absorber for Effective Sound Absorption Performance 三聚氰胺泡沫/多孔板复合吸声材料的设计

IF 0.8 4区材料科学

Materiale Plastice Pub Date : 2022-10-03 DOI: 10.37358/mp.22.3.5615

Xueliang Jiang, Q. Fu, Dan Wu, Guijiang Tang, Feng You, Chu Yao

引用次数: 0

Mechanical Character Analysis of Pineapple Fibre Epoxy Composite with Nanoclay Quantity Variation 纳米粘土用量变化下菠萝纤维-环氧树脂复合材料力学性能分析

IF 0.8 4区材料科学

Materiale Plastice Pub Date : 2022-10-03 DOI: 10.37358/mp.22.3.5614

P. Murthy, S. Bojan, S. Krishnasamy

{"title":"Mechanical Character Analysis of Pineapple Fibre Epoxy Composite with Nanoclay Quantity Variation","authors":"P. Murthy, S. Bojan, S. Krishnasamy","doi":"10.37358/mp.22.3.5614","DOIUrl":"https://doi.org/10.37358/mp.22.3.5614","url":null,"abstract":"\u0000Epoxy based hybrid composites are extremely wide used materials in the polymer engineering field and always have a demand for their versatile applications. Nano clay is yet another trending substance handled by many researchers due to their enhanced abrasion characteristics. This research was performed to investigate the effect of dispersing nanoclay into epoxy matrix and further coupled with pineapple fibers to fabricate a hybrid composite of excellent mechanical property. 4 layers of Pineapple fiber mats were compression moulded with epoxy nanoclay blend to obtain composite specimens of 4mm thickness. Nanoclay was added into epoxy resin at four different weight ratios (2%, 4%, 6%, and 8%) to form four different combinations of matrix materials into which pineapple fiber mats were reinforced individually at a constant weight ratio of 25%. The enhancement of mechanical and abrasion rate of the hybrid composites were matched with those of the neat Epoxy/Pineapple fiber composites that are currently being developed as alternatives for brake pads. Moisture absorption rate of the composites were analysed to ASTM D570 and Morphology was inspected using Field Emission Scanning Electron Microscope (FESEM). The results depicted optimum mechanical performance at 4 wt% nanoclay infused epoxy/pineapple fiber composite that had a tensile strength of 166.75 MPa, flexural strength of 801.15 MPa and impact strength of 148.76 kg/sq. m. The least abrasion rate was detected in the composite with 8 wt% nanoclay content, resulting in an abrasion rate of 0.1064 g/m.\u0000","PeriodicalId":18360,"journal":{"name":"Materiale Plastice","volume":" ","pages":""},"PeriodicalIF":0.8,"publicationDate":"2022-10-03","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"46328967","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"材料科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Preliminary Technological and Environmental Considerations for Generating Mechanical Components using Plant-based UV Resin 利用植物基UV树脂生产机械部件的初步技术和环境考虑

IF 0.8 4区材料科学

Materiale Plastice Pub Date : 2022-10-03 DOI: 10.37358/mp.22.3.5618

M. Vasilescu

{"title":"Preliminary Technological and Environmental Considerations for Generating Mechanical Components using Plant-based UV Resin","authors":"M. Vasilescu","doi":"10.37358/mp.22.3.5618","DOIUrl":"https://doi.org/10.37358/mp.22.3.5618","url":null,"abstract":"\u0000The scope of this paper is to determine the evolution of the dimensional value of the part and to study if there is gas and particle emission produced by the plant-based resin in the 3D printing process with mask stereolithography. For dimensional measurement, a solution with digital calliper is used. For the measurement of emission, two devices are used for indoor air quality. In the vertical direction of part body printed, it is possible to observe a descending linear type of direction with a minimum value at the highest element 3D printed. The data taken into account in this study are mathematically studied using the EXCEL regression equation for dimension. The gases emitted are measured with the booth devices in parallel for formaldehyde and volatile organic compound gases. For CO2 and particles, one of these devices is used. The air quality index was determined in relation to CO2 and, respectively, particle emitted. In the printing process, an increase in CO2 emission of 500 ppm can be observed in the initial phase of the process and a lower value in the body area. It is possible to consider that the quality air in 3D printing with plant-based clear resin is in the good to medium level from all types of emission. These data were put in ac-cordance with the level value offered by the manufacturer of the measuring devices. In this study the dimensional aspects are evaluated in parallel for two types of part bodies and the dimensional equations are the same after three mount times.\u0000","PeriodicalId":18360,"journal":{"name":"Materiale Plastice","volume":" ","pages":""},"PeriodicalIF":0.8,"publicationDate":"2022-10-03","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"44105130","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"材料科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0