GENERAL INFORMATION:
Funding institution: Ministry of Agriculture & Rural Development of Vietnam
Project lead organization: Vietnamese Academy of Forest Sciences
Project implementation organization: Research Institute of Forest Industry
Project leader: Dr. Nguyen Duc Thanh
Implementation time: 2022-2024
TARGETS AND RESEARCH CONTENTS:
Targets:
(1) Manufacturing a system of equipment for producing hollow veneer-based composite to create large-sized wooden components used in construction and interior wooden furniture;
(2) Developing a technological process for producing large-sized hollow veneer-based composite from plantation timber that meet quality requirements for use in construction and interior wooden furniture;
(3) Designing a model for producing large-sized hollow veneer-based composite from plantation timber, with a scale of 1,000 m3/year;
(4) Transferring technology into wood production industry.
Research contents:
Content 1. Research on the technological principles of producing large-sized hollow veneer-based composite from plantation timber
Content 2. Research on the design and manufacture of equipment systems for producing large-sized hollow veneer-based composite from plantation timber
– Research, design and manufacture of producing large-sized hollow veneer-based composite modules on a production scale
– Research and design and manufacture of equipment for connecting shaped plywood modules from peeled boards to create large-sized wooden components
Content 3. Research and develop a technological process for producing large-sized hollow veneer-based composite from plantation timber used in construction and interior wooden furniture
– Research on the process for producing C-shaped veneer-based composite wooden components
– Research on the process for producing I-shaped veneer-based composite wooden components
– Research on the process for producing rectangle-shaped veneer-based composite wooden components
– Research on evaluating the processing properties of veneer-based composite
– Research on finishing the surface of veneer-based composite
– Research on the technology for preserving and processing of veneer-based composite
– Propose a technological process for producing large-sized hollow veneer-based composite from plantation timber used in construction and interior wooden furniture
Content 4. Study on evaluating and designing a model for producing large-sized hollow veneer-based composite from Acacia plantation timber with a capacity of 1.000 m3/year
– Calculating and designing a model for producing large-sized hollow veneer-based composite
– Creating materials and products using Acacia veneer
– Training and transferring technology for producing large-sized hollow veneer-based composite into wood production industry.
Key results:
– The influence of the radius of the curved corner on the quality of veneer-based composite has been studied. The research results showed that with a component thickness level of 18mm, a curved corner radius of 30mm cannot produce wooden components, the surface and corners of the components were cracked and torn. At the radius of 50mm and 70mm, wooden components can be produced with a smooth, flat surface, uniform in thickness without cracking or tearing. The results of determining the properties of the components showed that two radius levels of 50mm and 70mm are equivalent. However, to ensure the aesthetics and features of the components for the purpose of joining to create large-sized products, the radius level of 50mm is suitable for the production of components with a thickness of 18mm. This is the basis for manufacturing pressing molds for forming p veneer-based composite on a production scale.
– Manufactured 01 pressing machine to produce veneer-based composite on a production scale. The equipment was certified by the Center for Technical Safety Inspection of Agricultural Machinery and Equipment, Department of Economic Cooperation and Rural Development, MARD to reach safety standards for wood processing equipment, and was granted inspection certificate No. 136/01-MNN-PB/22 dated on November 25, 2022.
– Manufactured 01 joining equipment on a production scale. The equipment has been inspected by the Center for Technical Safety Inspection of Agricultural Machinery and Equipment, Department of Economic Cooperation and Rural Development to reach safety standards for wood processing equipment, and has been granted inspection certificate No. 136/01-MNN-PB/22 dated November 25, 2022.
– Proposed technological process for creating C-shaped wooden components.
– Proposed technological process for creating I-shaped wooden components.
– Proposed technological process for creating hollow rectangle-shaped wooden components.
– Processing properties of wooden components have a relatively good processing properties; The surface quality after sawing is relatively smooth, thus helping to reduce the time for sanding and joining the product. The ability to drill and screw quite well, the stability of the drilled hole size after 24 hours is relative small, demonstrating the high dimensional stability of the wooden components.
– The surface of the wooden structure was decorated with PU paint and Inchem paint, both of which had a good quality. Overall, Inchem paint had a better film quality than that of PU paint.
– There was no significant difference in effectiveness of wood preservative treated by spraying and brushing method. Samples preserved 150g/m2 showed a good anti-fungal effect, termite invasion. Unpreserved material samples showed termite infestation at level 2. Preservative treatment of wooden components with BORAG1 preparation had little effect on the swelling, and bonding quality of wooden components.
– Completed the technological process for producing large-sized hollow veneer-based composite from plantation timber used in construction and furniture and registered for Technical Progress.
– Calculated and designed a model for producing large-sized hollow veneer-based composite from plantation timber, thereby testing and perfecting the technological process for producing large-sized hollow veneer-based composite from plantation timber. Preliminary assessment of the socio-economic efficiency of the model and proposed solutions to handle some impacts of the model on the surrounding environment and remedial measures.
– Produced 12,4 m3 of C-shaped, I-shaped and hollow rectangle-shaped wooden components. Created 1 hollow rectangle-shaped load-bearing structure, with the dimensions of length x width x thickness (3.000 x 300 x 200) mm; 01 partition wall with dimensions of length x width x thickness (3.000 x 2.000 x 150) mm. The quality reaches the requirements of materials used in construction and interior wooden furniture.
– Organized 2 training courses for 50 workers at 2 companies.
– Published 4 articles in the Journal of Forestry Science and the Journal of Agriculture & Rural Development.
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