• 한국가구학회지
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• 제28권4호
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• pp.371-379
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• 2017

This study established the scope of the main contents and interpretation of wooden product design using the CNC manufacturing technology as well as the basic concepts of which were defined, accordingly. After coming up with the definition of the CNC wood manufacturing technology from the academic point of view, a design study, using the practical CNC manufacturing technology, was conducted by analyzing and summarizing the contents of each process. In addition, data research and analysis including review on literatures and case studies of existing products were promoted besides design development through application of the design concepts, ergonomics, principle of molding, etc. Ultimately, this study suggested the step-by-step procedure in design drawing, 3D modeling, CAD/CAM data production, CNC manufacturing, and prototype completion together with figures. Through this, the study proposed a standard manufacturing guideline for wood product design using digital manufacturing technology. Base on such efforts, the advantages and points for improvement in product design using CNC manufacturing technology and the future direction of development were forwarded. Meanwhile, a prototype image that was developed through collaborative efforts between the academic circle and field workers was presented to help the case study on the wooden product design technique using CNC.

• Journal of the Korean Wood Science and Technology
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• 제45권5호
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• pp.613-621
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• 2017

본 연구는 건조된 나무못이 유지력 특성에 미치는 영향에 대해 알아보기 위해 실시했다. 실험블록은 두께가 15 mm인 소나무와 잣나무 목재 및 파티클보드로 제작했다. 직경이 6, 8 및 10 mm인 나무못은 밤나무, 잣나무 및 백합나무 목재로 각각 제작한 다음 전건시켜 사용했다. 연구결과 나무못 직경이 증가하면 유지력은 증가했지만, 유지력 강도는 감소했다. 건조된 나무못의 유지력은 일반적인 조건의 나무못의 유지력보다 잣나무목재 실험블록에 직경이 10 mm인 백합나무 목재로 만든 나무못을 제외하고 10% 이상 증가를 보였다. 유지력 강도는 모든 수종의 나무못 직경과 실험블록에서 10% 이상 증가를 보였다. 파티클보드 실험블록에 건조된 나무못의 유지력과 유지력 강도는 각각 6~14.2%와 6.2%~18.2% 증가를 보였다.

• Journal of the Korean Wood Science and Technology
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• 제35권1호
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• pp.64-72
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• 2007

팔만대장경판을 보관하고 있는 장경판전 내부의 판가 기둥에 대하여 생물적 열화 특성을 조사 연구하였다. 장경판전의 법보전과 수다라장의 판가기둥을 대상으로 연구 검토한 결과, 서가의 위치 및 부위 그리고 주변 환경에 따라 다양한 열화 현상이 있음이 밝혀졌다. 부재의 주요 열화는 미생물에 의한 부후현상으로 밝혀졌으나, 부후가 나타난 부분들은 초석에 접촉된 부위였으며 부후 정도가 매우 극심한 상태를 보였다. 법보전 판가기둥 부후가 더 심했다. 부후형은 백색부후형이 많았다. 그리고 일부판가기둥에서는 곰팡이류의 표면오염이 극심한 것으로 나타났다. 특히 동북, 서북, 북향에 위치한 부재에 더 심한 열화가 나타났으며 건물내부의 전면보다는 후면에 위치한 판가 부재의 부후가 심한 것으로 밝혀졌다 해충에 의한 피해는 거의 없었다.

• 디지털산업정보학회논문지
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• 제11권3호
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• pp.145-158
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• 2015

Disposable marine product packaging materials such as wooden, Styrofoam, and corrugated cardboard boxes have a very low reuse rate, thus causing the logistics costs to rise and making it difficult to establish a unit load system for marine products. Disposable packing containers to be discarded are accompanied by resource and environmental issues home and abroad. Transportation vehicles for marine products have to return empty without loading different kinds of products after delivery due to the smell and properties of marine products, thus posing as an obstacle to logistics rationalization. In an effort to overcome those limitations, this study examined the stages of transportation including "producer-wholesale market in the producing area-commission merchant-wholesale market in the consumption area-commission merchant-quasi-wholesale market-consumer" and also analyzed the utilization and distribution of disposable packaging materials currently used in the circulation of marine products including wooden, Styrofoam, and corrugated cardboard boxes. Based on the analysis results, the investigator developed a logistics rationalization model capable of promoting semi-permanent reuse and lowering empty vehicle rate on return routes as an alternative to address environmental issues caused by disposable packaging materials, which have been an obstacle to the logistics rationalization of marine products, packaging costs in the process of repeating packing and unpacking at each stage of marine products circulation, and empty vehicle rates on return routes after marine products delivery.

• Journal of the Korean Wood Science and Technology
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• 제34권5호
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• pp.59-66
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• 2006

The thermal properties of wood flour, Hwangto, and maleated polyethylene (MAPE) reinforced HDPE composites were investigated in this study. The thermal behavior of reinforced wood polymer composites was characterized by means of thermogravimetric (TGA) and differential scanning calorimetric (DSC) analyses. Hwangto and MAPE were used as an inorganic filler and a coupling agent, respectively. According to TGA analysis, the increase of wood flour level increased the thermal degradation of composites in the early stage, but decreased in the late stage. On the other hand, Hwangto reinforced composites showed the higher thermal stability than virgin HDPE, from the determination of differential peak temperature ($DT_p$). Decomposition temperature of wood flour and/or Hwangto reinforced composites increased with increase of heating rate. From DSC analysis, melting temperature of reinforced composites little bit increased with the addition of wood flour or Hwangto. As the loading of wood flour or Hwangto to HDPE increased, overall enthalpy decreased. It showed that wood flour and Hwangto absorbed more heat energy for melting the reinforced composites. Hwangto reinforced composites required more heat energy than wood flour reinforced composites and virgin HDPE. Coupling agent gave no significant effect on the thermal properties of composites. Thermal analyses indicate that composites with Hwangto are more thermally stable than those without Hwangto.

• Journal of the Korean Wood Science and Technology
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• 제50권6호
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• pp.375-391
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• 2022

Improving public awareness of wood is crucial for expanding the use of wood and establishing a wood culture. In this study, the environment and trends of the public's wood utilization were analyzed using a questionnaire survey and online text mining at a time when eco-friendly practices are gaining popularity. As a result of reducing climatic and environmental concerns and its positive physical and psychological effects, the use of wood is predicted to rise in areas intimately connected to everyday living, such as wood furniture, wooden structures, and interior materials. Nonetheless, there was a negative awareness that wood was expensive, difficult to maintain, and associated with deforestation. The correlations between wood-related search terms on major Korean portal sites were analyzed and categorized into five groups: Wooden architecture, cultural education, woodworking, wood industry, and wood policy. As a building material, wood was seen as more traditional and friendly than reinforced concrete and stone. Eighty-six percent of respondents expected to utilize wood as a building material in the future, regardless of whether the wood is domestically produced or imported. Sixty-five percent responded favorably about the effects of wood on the health of wooden home inhabitants. It is believed that both active publicity and quantifiable value analysis of human and environmental friendliness are required to increase pro-environment awareness of wood utilization.

• Journal of the Korean Wood Science and Technology
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• 제42권3호
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• pp.309-317
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• 2014

수확된 목제품(Harvested Wood Products, HWP)이란 제재목, 합판, 파티클보드 또는 목구조재, 건축내장재, 가구, 종이제품 등과 같이 나무를 원료로 사용하여 가공한 제품을 말한다. HWP는 수명을 다하여 폐기될 때까지 산림에서 생장하면서 저장했던 탄소를 장기간 제품 내에 저장하고 있기 때문에 대기 중의 이산화탄소 농도를 안정화시키는 효과를 발휘한다. 이러한 이유로, 탄소계정 시 목제품의 탄소저장효과를 인정해야 한다는 의견들이 지속적으로 제기되어왔다. 2011년 11월 더반에서 열린 17차 기후변화협약 당사국총회(COP)에서는 자국산 목재 만을 대상으로 하는 생산접근법을 HWP의 탄소계정방법으로 결정하였다. 이에 본 연구는 향후 국가 간 논의 및 협상에 대응하고자 국산 HWP 탄소계정에 필요한 인자인 반감기를 결정하기 위하여, 외국의 반감기 결정사례를 조사하고 국산 HWP 반감기 결정을 위해 필요한 요소를 분석하였다.

• Journal of the Korean Wood Science and Technology
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• 제44권5호
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• pp.736-742
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• 2016

나무못은 다양한 구조물의 목재부재들을 연결하는데 일반적으로 사용된다. 하지만 국산재의 나무못 유지력에 대한 자료는 매우 부족하다. 본 연구는 나무못의 직경과 천공여척이 유지력 특성에 미치는 영향에 대해 알아보기 위해 실시했다. 실험 블록은 두께 15 mm인 소나무와 잣나무 목재로 제작했다. 6, 8 및 10 mm 직경인 나무못은 밤나무, 잣나무 및 백합나무 목재로 각각 제작했다. 연구결과 나무못 직경이 증가하면 유지력은 선형으로 증가했지만 유지력 강도는 감소했다. 본 연구는 또한 천공여척이 작아질수록 유지력과 유지력 강도도 선형으로 증가하는 것을 보였다.

• 한국가구학회지
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• 제20권1호
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• pp.82-94
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• 2009

In this study, I suggest dyed-Glued laminated woods by using birch woods which are relatively cheaper than others. Since the dyed-Glued laminated woods which have the various colors to satisfy people's tastes and the dignified grains in the old woods enable us to product freely, these can provide us with stability of supply through replacing rare materials. The making wooden furniture designed with dyed-Glued laminated woods has these following characteristics. (1) This method which uses various colored woods can fulfill consumers' tastes through dyeing wooden plates, instead of using domestic woods which have limited colors-white, yellow and black. (2) Gathering wooden plates made by setting them into various frames enables us to get in large quantities of the materials with good grains, which we can only take from old woods. (3) Producing culture products using various colors and grains has enabled us to satisfy consumers and to create pro-environmental pieces. In conclusion, this study can be an alternative idea to forest resources which have been decreasing, and be an application method of using cheaper birch woods as well. Gathering and dyeing wooden plates might bring about the economic effect and be of much help to the expansion as furniture materials as well as interior ones.

• 한국가구학회지
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• 제20권3호
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• pp.239-246
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• 2009

The joinery technique, as one of manufacturing techniques for the wooden furniture, influences the production process, the economic efficiency, and the diversification of design. Especially, the usage of machine tools can determine how much the students can enhance their design expression capabilities during the practice class in furniture design courses of domestic universities, in accordance with whether to utilize the machine tools or not, and how much and frequent to use the machine tools. The study proved that the joinery techniques, based on the high-tech machine, has more efficiencies in the various aspects, including the easiness to manufacture the products, and the diversity of design than the joinery technique, based on the handcraft-only. As the ground of this, this study estimated the time to produce the wooden furniture by machine tools and by handcraft-only, each. Also, this study show the comparison of the features of three different joinery techniques. On the basis of this comparison, this study made the conclusion that the machine-based joinery technique, which is used in the practice class, is the best method to bring the best results in manufacturing the wooden furniture.