Process scheme of flat-pressure with hollow particleboard
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摘要: 针对现有挤压空心刨花板纵向强度低、刨花规格要求高等缺陷，以不同规格的刨花、板材实体密度和空心孔距作为影响因素，采用平压成型的方式试制30 mm厚的空心刨花板，并对板材主要物理力学性能进行测试和分析。研究表明：采用平压成型方式制造空心刨花板是可行的，能有效地提高空心刨花板的纵向强度。本试验范围内：①细杆状刨花压制的板材力学性能最好；②实体密度越大板材的静曲强度越大，实体密度0.70 gcm－3板材静曲强度为实体密度0.50 gcm－3板材静曲强度的近3倍；③空心孔距越大板材的静曲强度越大。实体密度0.70 gcm－3，空心孔距20 mm，细杆状刨花，压制的空心刨花板纵向静曲强度达到8.24 MPa。图5表3参9Abstract: Due to the existing defects with extrusion hollow particleboard, such as low longitudinal strength, demand for wood shavings. In order to improve these defects, we study used different specifications for shavings, entity density, and hollow hole distance input factor, along with flat-pressure, to make 30 mm hollow particleboard. Tests were performed on hollow particleboard and analysis of their main physical and mechanical performance was conducted. Results showed that in contrast to extruded hollow particleboard, the mechanical performance was greatly improved with flat-pressure hollow particleboard. In the test range: 1） the mechanical performance of the board made by rod-shaped wood shavings was best. 2） The higher the entity density, the higher number of the longitudinal MOR; the MOR of hollow particleboard with an entity density of 0.70 gcm－3 was nearly 3 times that of the entity density of 0.50 gcm－3. 3） The greater the hollow hole distance, the higher number of the longitudinal MOR. When the wood shavings were rod-shaped, the entity density was 0.70 gcm－3, and the hollow hole distance was 20 mm, then the MOR of the hollow particleboard was 8.24 MPa.［Ch, 5 fig. 3 tab. 9 ref.］
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Key words:
- wood science and technology /
- hollow particleboard /
- flat-pressure /
- longitudinal MOR
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链接本文:
https://zlxb.zafu.edu.cn/article/doi/10.11833/j.issn.2095-0756.2015.05.017
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