Формостійкість Як Критерій Якості Столярних Плит Із Вживаної Деревини

Hayda, Serhiy; Kiyko, Orest

doi:10.15421/411834

Cited by 9 publications

(7 citation statements)

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“…[7] та Гайда С.В. [11][12][13][14][15][16][17][18][19][20][21][22][23][24][25][26][27][28][29][30]. Вчені активно досліджують як методи переробки та використання ВЖД, так і її вплив на довкілля та сталий розвиток.…”

Section: математична модель прогнозування обсягів утворення вживаної ...unclassified

“…Проблеми класифікації ВЖД. Класифікація ВЖД необхідно здійснювати з врахуванням різних критеріїв, зокрема залежно від її походження, стану, потенційного використання та інших характеристик [7,17,18,22,27]. Ось деякі з основних категорій:…”

Section: математична модель прогнозування обсягів утворення вживаної ...unclassified

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Математична Модель Прогнозування Обсягів Утворення Вживаної Деревини

Gayda,

Lesiv

2023

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It is substantiated that a potential source of wood raw materials is various wood waste, in particular, post-consumer wood (PCW). A detailed review and thorough analysis was made to determine the principles of PCW classification at the Ukrainian level. The classification of PCW by degree of pollution into four groups is proposed. A method of calculating the used wood has been developed, which makes it possible to calculate its quantity effectively and reliably. A mathematical model for calculating the potential and balance of PCW by origin is proposed. It was established that the weighted average annual percentage of PCW from the trade network ranges from 14-16%, construction - 20-24%, raw materials and woodworking industries - 6-10%, used (old) furniture products - 10-16%, municipal waste - 16-18%, solid waste – 16-22%, other revenues – 6-8%. On the basis of statistical data from 2015 to 2023, approximating power dependences for each total indicator were obtained, which make it possible to forecast the volume of PCW formation in the near future, in particular until 2024. The implementation of the developed mathematical model makes it possible to effectively forecast the distribution of PCW by categories that determine the degree of pollution and, accordingly, the percentage of material processing of PCW. It is estimated that the potential of PCW in Ukraine in 2023 was about 1.783 million tons. It is justified that the improvement of PCW management at all levels should be based on general technical, economic and environmental standards and focus on the following proposals: analysis of PCW management; calculation of the potential of PCW as a secondary raw material and energy source; improvement of databases on technical, economic, environmental and statistical information; implementation of new approaches to PCW management, taking into account already existing schemes. A strategy for the material use of PCW was developed, which is based on the assessment of potential volumes of PCW according to a mathematical model, systematization of PCW by categories, classification by pollution, the concept of utilization of PCW by processing into dimensionally suitable blanks and construction materials, in particular, carpentry plates of various structures with predicted characteristics, which take into account the physical and mechanical properties of this additional wood resource.

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Section: математична модель прогнозування обсягів утворення вживаної ...unclassified

Математична Модель Прогнозування Обсягів Утворення Вживаної Деревини

Gayda,

Lesiv

2023

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“…There are studies that addressed the possibility of utilizing PCW in the production of carpenter plates [6,7], which involved PCW as it is for the inner layer of plates, as well as in the crushed form [7,8], which indicated ways to clean the crushed PCW. However, as for the use of PCW in a massive (whole) form in wood processing, there are no developments or the problem was not sufficiently studied [6,7,[9][10][11][12][13]. However, the use of wood waste, specifically PCW, as a material without additional treatment, is problematic, particularly due to various contaminations of timber.…”

Section: Literature Review and Problem Statementmentioning

confidence: 99%

Determining the regime parameters for the surface cleaning of post-consumer wood by a needle milling tool

Gayda¹,

Kiyko²

2020

EEJET

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This paper addresses the identified issue of the inefficient use of post-consumer wood (PCW) in the technological wood processing due to its surface contamination. An option to resolve this issue by cleaning PCW in a mechanized manner has been proposed, specifically by using a needle milling tool and selecting the tension value and feed rate. The impact of the tension of needle milling tools before processing on the cleaning depth of the contaminated surfaces of workpieces made from the PCW has been determined. The constructed model of the contact between a needle milling tool and the contaminated PCW surface has made it possible to describe the essence of the cleaning technique involving this tool. It was found that the depth of the layer removed by the needle milling tool's wire is reduced in proportion to an increase in the distance before cutting is completed. A nomogram has been built to determine a change in the front angle depending on the needle milling tool's tension value. Knowing the front angle at a certain point of the needle touch on the contact arc enables determining the thickness of cleaning, which is important for practical application, specifically, at a tension of 4.5 mm the thickness of the removed material can equal 3.46 mm. An adequate regression model was derived, the analysis of the coefficients of which showed a significant impact of tension (+0.895) on the depth of cleaning over the feed speed (+0.256). The devised model makes it possible to forecast the thickness of the removed layer to ensure the required cleanliness of the PCW wooden. Practical recommendations on the operational modes of a needle milling machine have been formulated: the feed rate should equal 10-12 m/min, the tension-0.5-5.0 mm, which could ensure, depending on the material's type, hardness, and the kind of PCW surface contamination, the removal of the surface layer with a thickness of 0.4-4.0 mm. A rational tension of the needle milling tool of 2.5 mm has been proposed for industrial application, which ensures the cleaning depth of contaminated surfaces within the range of 1.8-2.2 mm

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“…Сучасні меблеві вироби, зокрема ґратчасті мають бути екстравагантними, красивими, естетичними та функціональними [1,[2][3][4][5][6][16][17][18][19][20][21][22][23][24]. Основним складовим елементом ґратчастих меблів є ніжки [1][2][3][7][8][9][10][11][12][13][14][15]. Вони використовуються у різних виробах, стільцях кріслах, табуретах, столах, лавах та інших ґратчастих виробах.…”

Section: дослідження технологічних процесів виготовлення ні-жок столі...unclassified

Research of technological processes of manufacture of legs of dining tables of various designs

Gayda,

Voytovych,

Orikhovskyy

2020

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A technical description of the legs of dining tables of various designs with the texture of oak wood with the following dimensions of 750 × 52 × 52 mm. A method for studying the production processes of production of dining table legs of various designs with the texture of oak wood. Necessary materials have been calculated to make three types of dining table legs with oak wood texture. The necessary equipment has been calculated and the routes of technological processes have been developed and the planning of the shops has been presented in order to make three varieties of modern dining table legs with oak wood texture. The comparison of technological processes of making dining table legs with the texture of oak wood is made. You have determined the rational technological process of making the legs of dining tables. It is estimated that the third option for making dining table legs with a wood texture of square cross-section is optimal, where the cost of equipment is 817.25 thousand UAH, the number of employees 10 people, total power is 34.8 kW. It should also be noted that the third option generates the least wood waste and residues, in particular in the amount of 103.37 m3, and the cost of materials for a set of legs in the amount of 4 pieces is the lowest, amounting to UAH 312, which is much less than other options. The highest value of economic efficiency is the third option of investment, which is 0.208. The payback period for this option is 4.8 years. Therefore, the technology of making dining table legs is recommended, in which the base is made of three laminated rails with chipboard with a thickness of 16 mm with a square cross section of 48 (16 × 3) × 48 mm, and the shank with a cross section of legs made of planed oak veneer with a thickness of 2 mm.

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Формостійкість Як Критерій Якості Столярних Плит Із Вживаної Деревини

Cited by 9 publications

References 0 publications

Математична Модель Прогнозування Обсягів Утворення Вживаної Деревини

Математична Модель Прогнозування Обсягів Утворення Вживаної Деревини

Determining the regime parameters for the surface cleaning of post-consumer wood by a needle milling tool

Research of technological processes of manufacture of legs of dining tables of various designs

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