Energy-Consumption Factors of Air-Stream Moulding Machines

In this article, an outline of the key questions connected with the essential problems of energy-consumption of air-stream mouldingmachines has been presented. Research results and calculations of requisite parameters appraisable of energy-consumption of air-streammoulding machines have been supplemented also by the data analysis of offer of the moulding machines manufacturers. The attention onconstructional and technological factors which are favourable for the diminution of energy-consuming of the moulding process has beenpaid

Analysis of modern methods of assessing the quality of sand foundry moulds

Currently offered devices for the hardness measuring or indices of the mould strength, are presented in the hereby paper. The presented results allow to compare approximately the indications of individual devices of different types.The description of the author’s own microprocessor tester for the quality assessment of the sand foundry moulds, is shown. On the bases of the measurements results it is possible, to evaluate indirectly, the mould apparent density in the selected points, as well as several other properties

Cohesion and adhesion properties of modified water glass with colloidal solutions of ZnO

The article discusses the issue of the influence of colloidal solutions of nanoparticles of ZnO obtained using original method on physical and chemical properties (cohesions, adhesion, wettability) of water glass. Adhesion and cohesion strength has been determined on the basis of own methodology of measurement using a special apparatus. The results of the above measurements have been supplemented with selected measurements of quartz wettability by the modified binder. Also, exemplary results have been presented of tests involving basic properties of moulding sans containing an addition of the aforementioned binder. In conclusions, the influence of binder modification on the properties of moulding sands have been presented

Cohesion and adhesion properties of modified water glass with colloidal solutions of ZnO

The article discusses the issue of the influence of colloidal solutions of nanoparticles of ZnO obtained using original method on physical and chemical properties (cohesions, adhesion, wettability) of water glass. Adhesion and cohesion strength has been determined on the basis of own methodology of measurement using a special apparatus. The results of the above measurements have been supplemented with selected measurements of quartz wettability by the modified binder. Also, exemplary results have been presented of tests involving basic properties of moulding sans containing an addition of the aforementioned binder. In conclusions, the influence of binder modification on the properties of moulding sands have been presented

Aspekty energochłonności w procesie formowania podciśnieniowego

In the current manufacturing of foundry sand moulds, various methods of moulding sand compaction are used. Researchers are still looking for the optimal methods of mould manufacturing not only in terms of achieving the best technological effects, but also in terms of energy consumption. The article presents selected results of research of their own variant of the synthetic moulding sand compaction process using a vacuum. The measurements were also designed for evaluation the energy consumption in this method. The results were compared with other air flow moulding methods which are widely used. The study was performed on the original design test stand, which allows the visualization of the compaction process.W wytwarzaniu piaskowych form odlewniczych sa stosowane obecnie różnorodne metody zagęszczania. Nadal poszukiwane są metody wytwarzania form optymalne nie tylko pod względem uzyskiwanych efektów technologicznych, ale również pod względem ważnego parametru- energochłonności procesu. W artykule przedstawiono wybrane wyniki badań własnego wariantu procesu zagęszczania podciśnieniowego syntetycznej masy formierskiej oraz pomiarów zmierzających do oceny metody w aspekcie energochłonności. Wyniki porównano z wynikami badań innych metod zagęszczania strumieniowego - powszechnie obecnie stosowanych w wytwarzaniu form odlewniczych. Badania wykonano na oryginalnym stanowisku badawczym własnej konstrukcji, umożliwiającym wizualizacje procesu zagęszczania

Control Charts as the Tool for Assessment of the Variability of the Castings Manufacturing Process

Szybko rozwijająca się gospodarka oraz ciągłe wzrastające wymagania klientów wymuszają na odlewniach nieustanną rywalizację o egzystencję i dalszy rozwój. Osiągnięcie tych dwóch podstawowych rzeczy, jest sprawą niezmiernie trudną. Zarząd odlewni staje przed skomplikowanymi decyzjami związanymi z maksymalizacją efektywności produkcji. Do takich decyzji należy m.in. wdrażanie nowych systemów czy też instrumentów zarządzania jakością. W artykule poddano analizie i ocenie system kontroli jakości odlewów oparty na kartach kontrolnych do pomiarów liczbowych [...].Rapidly growing economy and the continuous increasing demands of customers force on foundry companies the ceaseless rivalry for existence and further development. Achieving these two basic aims is extremely difficult matter. Management of foundry is faced with complicated decisions connected with maximization of the production effectiveness. Such decisions include, among others, implementation of new systems or instruments of the quality management. The article analyzes and evaluates the quality control system of casting based on control charts of measurements [...

Racjonalizacja konstrukcji i eksploatacji urządzeń do przerobu masy formierskiej

The rationalization of construction and vibro- fluidised bed coolers and turbine (rotary) mixers, allows for keep sufficiently high quality and increasing their utility values. This concerns optimization of construction and operation to increase the efficiency of their work. The presented research results illustrate a range of the work designed primarily to supplement theoretical foundations of realized processes in industrial devices, including the topics vibro- fluidization , evaporative cooling and refreshing mixing. Presented results concern the investigation of the industrial devices, which is difficult in the practical accomplishment. The part of testing was conducted in real terms of the functioning devices in the industry.Racjonalizacja konstrukcji i eksploatacji chłodziarek wibrofluidyzacyjnych oraz mieszarek wirnikowych pozwala na utrzymywanie odpowiednio wysokiej ich jakości i zwiększanie ich walorów użytkowych. Dotyczy to optymalizacji konstrukcji i eksploatacji urządzeń celem zwiększenia efektywności ich pracy. Prezentowane wyniki badań ilustrują zakres prowadzonych prac mających przede wszystkim na celu uzupełnienie podstaw teoretycznych realizowanych procesów, w tym o zagadnienia wibrofluidyzacji, chłodzenia wyparnego i mieszania odświeżającego. Zaprezentowane wyniki dotyczą, trudnych w realizacji praktycznej badań urządzen przemysłowych. Część badań przeprowadzono w rzeczywistych warunkach pracy urządzeń w przemyśle

Comparative analysis of power measurement results in the testing of sand mixers

Investigations of operating parameters of widely used sand mixers reveal a wide variability range in the values of parameters associated with their power demand. Power efficiency of manufacturing processes has received a great deal of attention lately, which encourages the research efforts to optimise this aspects of operation of machines and installations as well. In the first place these machines and installations have to work properly as a part of the process line- which applies also to moulding sand mixers. Experiments conducted by the authors suggest that the same goal can be achieved at variable energy input levels. To obtain information about the power demands of sand mixers requires the use of highly specialised equipment, methodology and result processing procedures. This study provides a brief characteristic of measurement equipment and results of measurements taken on a unit AG-015 (based on a roller mixer) and a laboratory rotor mixer