scholarly journals The Analysis of Research of Wood Processing Wastes Briquetting by Using Hydraulic Press Equipment

2019 ◽  
Vol 2 (16) ◽  
pp. 97-118
Author(s):  
Oleg Chibirev ◽  
Olga Kunitskaya ◽  
Armen Davtyan
Author(s):  
Adam Olszewski ◽  
Paulina Kosmela ◽  
Łukasz Piszczyk

AbstractThe sustainability of production systems in wood processing, wood industry, and wooden waste disposal is an important issue for European industry and society. Proper development of products based on renewable wood resources gives an opportunity to provide materials with long-term environmental, social, and economic sustainability. This study aims to establish a new way of forestry and agricultural waste materials utilization by synthesis of bio-based polyols and manufacturing of polyurethane wood composites (PU-WC). The first part of this paper describes the liquefaction of wood shavings at a temperature of 150 °C for 6 h in three different solvents—glycerol, poly (ethylene glycol) and their mixture in a 1:1 ratio. The second part deals with the synthesis of polyurethane (PU) resins containing 90% of biopolyol. Eight sets of materials with different NCO:OH ratios were obtained in a one-step method using a hydraulic press. These materials were characterized, and the material with the most promising properties was selected for polyurethane wood composites production. Composites with 40%, 50%, 60%, and 70% of wood shavings were obtained. The addition of filler caused an increase in flexural strength, Young`s modulus, hardness, and impact strength. Scanning electron microscopy (SEM) showed good adhesion between the polymer and the filler. The optimum filler content is between 50 and 60% by weight of the composite. The presented study provides a significant step toward a greener alternative for materials produced mainly from non-renewable resources.


2020 ◽  
Vol 13 (2) ◽  
pp. 378
Author(s):  
Ismael Marasabessy ◽  
Fien Sudirjo ◽  
Syahibul K. Hamid ◽  
Yuni Irmawaty

The business group which is become the target of this activity is a group of processing and selling enbal (cassava) in Ibra village, Southeast Maluku regency. This group has been producing for more than 10 years but there are still many shortage, especially in the way of press along with the sanitize and hygiene of the production process. The purpose of this activity is to increase the efficiency in production process by applying screw press equipment and improving sanitation and hygiene in its production. The method of implementing activities uses discussion and training techniques. The activity is carried out in three stages, firstly survey on condition and discussion with partners relates to the conditions of producing pressing enbal, secondly the manufacture of pressing tools, third is the application of pressing tools in production activities of partners. The results of the activity showed that the screw press was able to produce enough water of enbal / grated cassava so that it is drier than the traditional method. Press time becomes faster which only 12-15 minutes, whereas in the traditional way it takes 14-24 hours. The content of enbal’s water decreases very low, reaching 5-7%, the sanitation becomes better because the juice is no longer stagnant on the ground but is collected in a bucket, and the use of pressing tools is very practical. Likewise the HCN level is very low, less than 3mg / kg so the product is very safe for consumption. This screw press is very helpful in the efficiency of the production process of plate enbal (cassava plates) which is cleaner and healthier.


2000 ◽  
Author(s):  
Peter J. Ulintz

Abstract Combining today’s computer technology with new generation, multiple-action, hydraulic press equipment, has created a new process opportunity in deep drawing. Integrating these modern machine and computer controls with innovative programming and tool designs, has led to the development of a production process that produces a double reverse-drawn, cylindrical shell that significantly exceeds traditional Limiting Drawing Ratios (LDR). The method used to produce these shells employs a recently developed technique, herein referred to as Tractive Kinematic Regression, or more simply, the TKR process. The TKR process promotes material flow by “feeding” material into the die cavity, as opposed to the punch having to “draw” or “pull” in the flange. This is accomplished through the use of concurrent - but unequal - force and motion curves of a forward moving punch and a regressing (reverse moving) die ring. The computer controlled kinematics, forces and motion curves resulted in less material straining and thereby, provided increased formability and improved LDR.


2012 ◽  
Vol 46 ◽  
pp. 145-154 ◽  
Author(s):  
G. Dobele ◽  
T. Dizhbite ◽  
M.V. Gil ◽  
A. Volperts ◽  
T.A. Centeno

Author(s):  
О.В. Чибирев ◽  
О.А. Куницкая ◽  
Д.А. Ильюшенко

Статья посвящена исследованию зависимости жесткости опилок от их фракции и степени уплотнения при прессовании на гидравлическом прессе. Для экспериментов использовали опилки, полученные при пилении древесины сосны дисковой и цепной пилой. Экспериментальный материал предварительно сепарировали при помощи колонки сит так, чтобы получить пробы с различной фракцией: 5-10 мм, 3-5 мм, 2-3 мм, 0,5-2 мм, <0,5 мм (поддон). Влажность опилок составляла 7-10%. Прессование экспериментальных проб производили на гидравлическом прессе RUF BP-600 при давлении прессования до 150 МПа. Всего было выполнено 15 опытных запрессовок, по 3 повторения для каждой фракции опилок. Установлено, что в общем виде экспериментальные зависимости потребного давления прессования опилок от плотности брикетов можно описать степенными функциями. Также на основании экспериментальных данных установлено, что модуль деформации сосновых опилок изменяется в пределах от 0,5 до 5 ГПа и заметно зависит как от плотности, так и от фракции прессуемого материала. Экспериментально установлено, что при равном давлении легче, по сравнению с прочими фракциями, прессуются опилки фракцией 3-5 мм. Оптимальная для прессования фракция опилок в проведенных опытах составила 3,7 мм. При фракции крупнее 7 мм жесткость материала резко возрастает, в связи с этим процесс прессования усложняется. В заключение освещаются перспективные направления дальнейших экспериментальных исследований, приводятся рекомендации по структуре планов последующих экспериментов. The article focuses on the dependence between stiffness of pine sawdust, its faction and compaction degree in the process of briquetting under hydraulic press. Experimental samples came from sawdust produced with sawing of pine wood with circular saw and a chainsaw. The experimental material was separated using a column of sieves in order to obtain samples of various fractions: 5-10 mm 3-5 mm 2-3 mm, 0.5-2 mm, <0.5 mm (on the pan). The sawdust had 7-10% humidity. Briquetting of the experimental samples was performed with RUF BP-600 hydraulic press at a pressure of 150 MPa. (15 experimental samples total, 3 reps for each sawdust fraction). The results establish that in general the experimental dependence between required compaction pressure and the briquettes density appears as a power functions. Based on experimental data, research sets that the deformation modulus of pine sawdust varies from 0.5 to 5 GPa and significantly depends on the density and fractions of the molded material. The paper establishes that 3-5 mm fraction of sawdust is easier compacted compared to other fractions. Optimal fraction of sawdust in the experiments was 3.7 mm. Sawdust fraction over 7 mm has sharply increased stiffness, thereby pressing process becomes complicated. In conclusion, the article highlights prospective topics for further experimental research, providing guidance on the structure of plans for subsequent experiments.


2016 ◽  
Author(s):  
Marianna Laka ◽  
Laura Vikele ◽  
Linda Rozenberga ◽  
Sarmite Janceva

1972 ◽  
Vol 180 (1061) ◽  
pp. 469-485 ◽  

The types of effluent discharged by wood-processing industries and their effects on the benthic environment are described. A brief summary of the results of the Lochs Linnhe-Eil survey 1964-70 is given. Populations of the molluscs Corbula , Thyasira and Myrtea have increased in most areas, and appear to be favoured by a moderate increase in the organic input to the system. Corbula dominates in the shallower polyhaline areas, and Myrtea in the deeper mixoeuhaline areas. On sediments with a high natural leaf litter content a low diversity fauna occurs, dominated by the annelids Cirriformia , Peloscolex , Capitella and Staurocephalus , and the crustacean Idotea . The predominance of this kind of fauna has increased in its area of occurrence in recent years. Comparisons of these faunal distributions and changes with those found in surveys in other marine areas affected by wood-processing wastes and other types of organic effluents show considerable similarities in the faunal changes occurring under increased organic loading. The utility of ‘indicator’ species in the assessment of organic pollution is briefly discussed. The need for detailed information on the ecological and physiological reasons underlying the varied faunal successions which occur under conditions of pollutional stress is emphasized.


2008 ◽  
Vol 44 (7-8) ◽  
pp. 444-451
Author(s):  
V. K. Shirgin ◽  
B. V. Matseevich ◽  
O. V. Tin’kov ◽  
A. N. Chichev ◽  
Yu. F. Gartsev ◽  
...  

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