This article deals with specific polymer composites modified for the Fused Deposition Modelling (FDM) which is a 3D print technology. These two phase systems involve thermoplastic matrix filled natural fibres. The crucial demand of this progressive technology put on accuracy semi-product formed into filament shape. To reach smooth production prototypes should have constant diameter. In article, individual steps composite pelletization and following pre-processing processing activities are...

This paper deals with experimental determination of toughness, hardness and impact properties AISI H13 (DIN 1.2344) tool steel which was manufactured using Selective Laser Melting (SLM) technology. The is a chromium-based primarily used for hot working applications such as pressure casting moulds automotive industry. Evaluation toughness are vital reliable use SLM-processed material, especially in the case highly loaded structures. Mechanical tests were carried out on printed specimens,...

Efficient machining using wire electrical discharge (WEDM) technology is a compromise between cutting speed and resulting surface quality.Typical morphology of the machined by WEDM shows plenty craters caused electrospark discharges produced during process.This work focused on assessing impact machine setting parameters quantitative qualitative evaluation workpiece aluminium alloy AlZn6Mg2Cu.Using metallography, effects arisen process spark erosion cross-sections preparations were...

The article describes modifications to the effector of a manipulator arm proposed in order increase accuracy jaw force measurements.Gripping measurement is performed using strain gauges.Their proper positioning and connection minimize not only influence position centre gravity manipulation object on jaws but also effect temperature changes around measuring area.The possibility altering magnitude gripping was incorporated into robot control application.This greatly increases security handling...

In the frame of injection moulding production process not all raw material creates final products and a waste is generated (defective rejected products, cold runners, etc.).This technological very often reused in production, which reduces costs, however, this regrind or regranulated affects properties part.The negative impact recycled presence depends on degree chain cleavage polymer macromolecules caused by high temperature load.The deterioration product end-use does have to be demonstrated...

This paper deals with the use of additive manufacturing from Ti-6Al-4V metal powder in field individual implants.Additive technologies such as Selective Laser Melting (SLM) and Electron Beam (EBM) enable manufacturers to design implants precisely respect actual anatomy each patient.In this paper, two major properties printed parts are studied.In first part, monotonic mechanical material as-built heat treated condition evaluated.In second part work, shape accuracy is evaluated on model...

The paper deals with the study physical-mechanical properties of polypropylene composites in dependence on amount hollow glass microspheres matrix. Composite material compounded by method "Water cooling strand pelletizing" consists polypropylene, adhesion promoter and average diameter (18÷20) μm different density: 0,46 g/cm 3 (iM16K) 0,60 (iM30K). Measured results are compared talc filled polypropylene. In terms experimental measurement is differential scanning calorimetry evaluated also...

Still more and applications using synthetic polymers find new material alternative in materials based on polymer filled with nature fibers mainly plant fibers. Not only common but also technical is possible to use fiber composites. But some additional modifications are necessary perform gain properties applications. Mainly increasing adhesion between matrix the most intent of these operations. This paper deals maleic anhydride coupling agent silane effect polypropylene jute composite its...

This article deals with a development of new filtration materials for respirators. Contemporary used filters charged microfibers are not sufficiently stable in all conditions and efficient types particles that is the reason why requirement generation rising up. The research was focused on nanofibrous have great precondition to be as filtering material designed multilayer sandwich consisting spundbound, meltblown layers. For evaluation final properties performances different 3D structures...

In recent years there are efforts to use polymer nanofibers and their properties in composites. The aim of such is develop composites with fillers which would be able into a great extend take advantage any unique nanofibers. Such area research belongs the project whose part also incorporate nanoparticles composite thermoplastic matrix. important represents finding suitable additives ensure sufficient adhesion between filler matrix crucial for final properties.

The article is focused on impact evaluation of controlled inner structure production tools and new cooling method regulation thermal processes for injection moulding technology. mould inserts with porous were cooled by means liquid CO2 which very progressive enables fast intensive heat transfer among the plastic product, tool medium. created using rapid prototype technology (DLSM) they had a bi-component consisting thin compact surface layer defined open cell character where was flowing...

Rolling bearings are an important part of most machines with rotating parts.Therefore, their technical diagnostics is essential condition for ensuring the safe operation machine.This article focuses on assessment using one methods diagnosticsvibration diagnostics.In our case it determination value diagnostic variables rolling a subsequent prediction based evaluation time series analysis.Theoretical knowledge and practices verified measurement data obtained from single-row ball type 3208A in...

The complexity of today's plastic parts as well the costs, quality makes it necessary to recognize potential errors early, already in development phase and moulds. Therefore, computer analysis became requisite part any preprocessing phases. Due continuous effort decrease product weight price many new techniques were developed recently. One relatively end very effective technique is production light construction products with using foaming agents. main aim this paper therefore focuses on...

This paper deals with mechanical properties research of innovative polymer multiphase composite materials consisting matrix and isotropic or anisotropic oriented deterministic fractal shapes made by 3D printing. Standard for example polypropylene glass fibres have which depend mainly on matrix-fibre interface strength, fibre length, strength orientation. [1] In case under critical length is orientation stochastic in injection moulded composites. So possible to say that these (standard)...

This article is focused on analysis of impacts cellular structure even heat distribution and removal rate from surface the bi-component experimental part with using cooling potential liquid technical gases. Experimental had core/shell both components were made same metal material. The only difference between them was their structure. shell component compact consistent core either as layer or it created fractal patterns microporous open cell character. Porosity influence temperature field...

Cooling the injection moulds with using of liquid CO 2 is rated among progressive and innovative tempering systems nowadays. In ideal case this cooling method chosen in combination conventional drilled or milled channels where heat transfer medium flows. These wide-spread ways are not very often effective enough they do provide required accuracy control during production by moulding technology. Implementation capillary tubes that bring to critical zones enables local increasing transfer....

This paper deals with optimization of mechanical properties mainly hardness and stiffness flexible part two component injection molded regarding production systems. Optimization is performed on material combinations: Thermoplastic - thermoplastic elastomere silicone. Polymers used for are suitable medical applications.

This article deals with the impact evaluation of utilization innovative cooling system exploiting liquid carbon dioxide injected into injection mould. Process heat transfer from polymeric melt and final part solidification has a direct on creation morphology structure semi-crystalline thermoplastic materials their ultimate mechanical properties. Usually processes in production tools are controlled by tempering channels where medium circulates (oil, water tec.). conventional way some...

This paper deals with mechanical properties research of innovative polymer multiphase metal and composite materials consisting matrix isotropic or anisotropic oriented deterministic fractal shapes made by 3D printing. By creating reinforcing internal structure connected is possible to gain unlimited directing. These - placed in system – are significantly influencing whole material mainly case stress on the limit strength, proportional elongation strength tensile/ flexural modulus. Fractal...

The contribution deals with the processibility and applicability of polymer composite systems based on polypropylene matrix. composites were filled vegetable fibres (particularly cotton fibres, coir hemp jute fibres) interface between polymeric matrix natural was modified using two types coupling agents (the organosilane agent maleic anhydride grafted polypropylene). For evaluation final impact all three phases presence melt flow behaviour analyzed (MFI analysis according to ISO 1133) for...