This paper focuses on the crystalline structure of injection moulding grade poly(lactic acid) (PLA) and effect processing.The research is induced by significant differences in crystallinity pure PLA resin, moulded product, thus reprocessing products.2 mm thick sheets were re-crystallized a conventional oven at 60-140°C, for 10-60 minutes to achieve various contents.The properties these investigated dynamic mechanical analysis (DMA), differential scanning calorimetry (DSC), wide angle X-ray...

A novel method, a 3D printing technique, in particular, acrylic photopolymer material-based Rapid Prototyping (RPT) have been used to 1) fabricate molds for PDMS (PolyDiMethylSiloxane) casting; 2) RPT-based microfluidics and 3) research instrument platforms. fabricated order cast flow cell Surface Plasmon Resonance (SPR) instrument, chamber lysis nanobiological sensor. has utilized create test several resin-based prototypes different microfluidic structures (chaotic mixers, reagent buffer...

Respiratory parameters, such as respiratory rate (RR), inhalation time (tin), exhalation (tex), and their ratio (IER=tin/tex), are of great importance to indicate clinical differences between healthy people those with diseases. Herein, we report a respiration monitoring triboelectric nanogenerator (RM-TENG) nanofibrous membranes, which can be used smart, changeable, self-powered mask filter high filtration efficiency for multiple indices (e.g., RR, tin, tex, IER). We created mathematical...

One of the essential requirements injection molding is to ensure stable quality parts produced. However, numerous processing conditions, which are often interrelated in quite a complex way, make this challenging. Machine learning (ML) algorithms can be solution, as they work multidimensional spaces by structure datasets. In study, we used four ML (kNN, naïve Bayes, linear discriminant analysis, and decision tree) compared their effectiveness predicting multi-cavity molding. We pressure-based...

This paper focuses on the reinforcing of Poly(lactic acid) with chopped basalt fibres by using silane treated and untreated fibres.Composite materials 5-10-15-20-30-40 wt% fibre contents were prepared from sized extrusion, injection moulding, while composites 5-10-15 also as control.The properties moulded extensively examined quasi-static (tensile, three-point bending) dynamic mechanical tests (notched unnotched Charpy impact tests), analysis (DMA), differential scanning calorimetry (DSC),...

Poly(lactic acid) (PLA) is a "green" alternative to petroleum-based plastics and desirable choice for many applications. However, low heat deflection temperature lack of toughness, together with the slow crystallization kinetic neat PLA hinder its widespread application. The weak properties can be improved improvement crystallinity, which depends on molecular weight, D-lactide content, presence different modifiers processing conditions. We aimed maximize crystallinity rate explore...

ADVERTISEMENT RETURN TO ISSUEPREVArticleNEXTChemical Studies of Polyaspartic Acids1J. KOVACS, H. NAGY I. KÖNYVES, J. CSÁSZÁR, T. VAJDA, and MIXCite this: Org. Chem. 1961, 26, 4, 1084–1091Publication Date (Print):April 1, 1961Publication History Published online1 May 2002Published inissue 1 April 1961https://pubs.acs.org/doi/10.1021/jo01063a026https://doi.org/10.1021/jo01063a026research-articleACS PublicationsRequest reuse permissionsArticle Views490Altmetric-Citations61LEARN ABOUT THESE...

The motive of this study is to lessen the dependence on non-degradable plastic packaging by developing alternative material; reinforced poly(lactic acid) (PLA) with kenaf fiber (KF) biocomposite using available processing machineries. For that reason, focuses fabrication PLA–KF intermeshing co-rotating twin-screw extruder and then injection molded for mechanical characterization. effect KF loading from 0 20 wt% was studied. No coupling agent added due high affinity PLA both components are...

Nowadays, two of the most important polymer processing technologies are injection molding and 3D printing.Injection is ideal for mass production, while printing producing products with a complicated geometry.When these combined, such complex can be manufactured economically that would too costly if produced traditionally.We present possibilities combining printing.We introduced novel concept to study compare bonding strength polylactic acid (PLA) parts prepared by overprinting overmolding.We...

The simultaneous improvement of injection molding process efficiency and product quality, as required by Industry 4.0, is a complex, non-trivial task that requires comprehensive approach, which involves combination sensoring information techniques. In this study, we investigated the suitability in-mold pressure sensors to control in multi-cavity molds. We have conducted several experiments show how optimize clamping force, switchover, or holding time measuring only mold. results curves...

Abstract In this study, we investigate a novel method for determining product weight based on cavity pressure, measured by internal sensors integrated into the mold. The ultimate goal is to find model that better than linear expressions in literature pressure integral. We conducted experiments using different materials (ABS and PP) assess effects of holding time weight. relationship between weight, integral, was modeled with saturation curve. This way, maximum achievable can be predicted....

<title>Abstract</title> The advent of additive manufacturing technologies has revolutionized the design and application injection molds with conformal cooling systems. These mold inserts, manufactured directly from metal powder, feature complex geometries that align part contours, enabling more efficient uniform heat extraction than traditional methods. However, over time, even most circuits degrade due to corrosion, limescale, other deposition on channel walls, significantly decreasing...

The most time-consuming phase of the injection molding cycle is cooling. Cooling efficiency can be enhanced with application conformal cooling systems or high thermal conductivity copper molds. channels are placed along geometry injection-molded product, and thus they extract more heat removal uniform than in case conventional systems. In mold inserts, made by drilling facilitated coefficient copper, which several times that steel. Designing optimal a complex process; proper design requires...

The new trend in the composites industry, as dictated by Industry 4.0, is personalization of mass production to match every customer’s individual needs. Such synergy can be achieved when several traditional manufacturing techniques are combined within a single part. One most promising combinations additive (AM) with injection molding. AM offers higher freedom comparison techniques. As result, even very sophisticated geometries manufactured at reasonable price. bottleneck rate, which orders...

The ever growing demand for reducing costs and decreasing the time to market in today's plastics industry makes rapid tooling prototyping a highly researched area. 3D printed injection mold inserts make it possible produce prototype parts small series fast cost-effectively. mechanical strength therefore life expectancy of polymeric are low compared their traditional steel counterparts. In order increase reliability inserts, in-situ state monitoring during molding is essential. this paper, we...