A hot pressing process for environment-friendly oriented strand board

Abstract

The invention provides a hot-pressing process for environment-friendly oriented strand board, the hot-pressing process includes pre-pressing, water spraying, roll-coating release agent, and hot-pressing, and the speed of the hot-pressing press is 250-350mm / s , the platen temperatures of the press are 240-245°C, 230-240°C, 215-225°C, 175-185°C, 155-165°C respectively; the pressure of the pre-compression is 1.5MPa; The amount is 30-40g / ㎡, the water content after water spraying is 8-12% for the surface slab, 4-5% for the core layer slab, and 12-18% for the fine material layer slab; The spraying amount of the mold agent solution is 15-20g / ㎡; the hot pressing process of the present invention improves the uniformity of spraying, saves the amount of release agent used, and is more environmentally friendly; the thickness deviation of the plain plate obtained by hot pressing is small, and the deviation is ‑0.3mm to 0mm.

Description

technical field [0001] The invention belongs to the technical field of plate manufacturing, and relates to a hot-pressing process, in particular to a hot-pressing process for an environment-friendly oriented particle board. Background technique [0002] With the recovery of the economy in Asia, the consumption of wood products is on the rise. The development of western China, the rise of urban agglomerations in the Central Plains, the promotion of small town construction in coastal provinces of China, the implementation of the Three Gorges Project and the South-to-North Water Diversion, and the expansion of higher education , a large number of agricultural population will be stationed in cities and towns, the construction industry will develop extremely fast, and the consumption of wood products such as furniture and floors will rise rapidly. In particular, the development of China's rural economy and the increasing affluence of farmers have also led to a linear increase in ...

AI Technical Summary

Problems solved by technology

[0005] (1) In the existing hot-pressing process, the slab is easy to stick to the steel belt during hot-pressing, resulting in downtime for maintenance, low speed of the press, and reduced yield of slabs;

[0006] (2) The quality of oriented strand board prepared by the existing hot pressing process is unstable, prone to bubbling and delamination, and the scrap rate is high;

[0007] (3) The oriented strand board prepared by the existing hot pressing process has a high formaldehyde content

Images