砖坯的模子撞击裂纹,有的叫45°裂纹。有这种裂纹的坯或砖,开裂后斜分两片,每片一边厚,一边薄,其形状如菜刀,所以又有的惯称“大刀片”,并把这种纹,叫着“刀片纹”。就是这种纹,曾是我厂生产、维修最棘手的问题。我厂产品为蒸压灰砂砖,年产量4000～4500万块,配有盘转式八孔压砖机 The brick mold hits cracks, and some are called 45° cracks. The cracked billet or brick is split into two pieces after cracking. Each piece is thick on one side and thin on one side. The shape is like a kitchen knife. Therefore, some of them are often called “big blades” and call this kind of pattern “blade”. Pattern." This pattern was once the most difficult problem in production and maintenance of our factory. Our products are autoclaved sand-lime bricks with an annual output of 4,000 to 45 million pieces.