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玻璃钢风管手糊工艺
玻璃钢风管手糊工艺
Hand pasting technology of FRP air duct
1) 首先在模具成型面上涂抹脱模剂(或在模具外表面包上一层透明的玻璃纸)，待充分干燥后，将加有引发剂(或固化剂)、促进剂等添加剂均匀涂刷在模具成型面上，随之在其上铺放裁剪好的玻璃布。然后在铺好的玻璃布上再涂刷氯氧镁水泥，并注意驱除气泡。涂刷好氯氧镁水泥浆后再铺上剪好的玻璃布，如此重复上述操作，直到达到设计和规范厚度。
1) first, apply mold release agent (or a layer of transparent cellophane on the surface of the mold) on the molding surface of the mold. After the mold is fully dried, evenly brush additives such as initiator (or curing agent) and accelerator on the molding surface of the mold, and then lay the cut glass cloth on it. Then brush magnesium oxychloride cement on the paved glass cloth, and pay attention to eliminate the bubbles. After brushing the magnesium oxychloride cement slurry, lay the cut glass cloth, repeat the above operations until the design and specification thickness are reached.
2) 风管表层浆料厚度以压平玻璃纤维网格布纹理为宜(可见布纹)。管壁表面不允许有密集气孔和漏浆，以避免承受弯曲拉应力(正风压)、弯曲压应力(负风压)时的应力集中。
2) the thickness of the slurry on the surface of the air duct is appropriate to flatten the glass fiber grid texture (visible texture). Dense pores and leakage of slurry are not allowed on the surface of pipe wall to avoid stress concentration under bending tensile stress (positive wind pressure) and bending compressive stress (negative wind pressure).
3) 管体与法兰转角处应有过渡圆弧，过渡圆弧半径应为壁厚的0.8~1.2倍，才能提高悬臂状态法兰承载能力和避免应力集中。要求风管法兰处的玻璃纤维网格布应延伸至风管管体上。
3) there should be transition arc at the corner of pipe body and flange, and the radius of transition arc should be 0.8 ~ 1.2 times of the wall thickness, so as to improve the bearing capacity of cantilever flange and avoid stress concentration. It is required that the fiberglass mesh at the duct flange shall be extended to the duct body.
4) 玻璃纤维网格布长度、宽度不够时一定要采取搭接的方法，才能提高搭接处的切向承载能力，从而有效地克服径向拉应力、弯曲接应力和弯曲切应力。玻璃纤维布在接缝处的搭接长度一般为50~100mm;而且每层玻璃纤维布接缝处与相邻层接缝应有一定距离。相邻层之间的纵、横搭接缝距离应大于300mm，同层搭接缝距离不得小于500mm。
4) when the length and width of glass fiber gridding cloth are not enough, the method of lapping must be adopted to improve the tangential bearing capacity of lapping, so as to effectively overcome the radial tensile stress, bending joint stress and bending shear stress. The lap length of fiberglass cloth at the joint is generally 50-100mm, and there should be a certain distance between the joint of each layer of fiberglass cloth and the joint of adjacent layers. The longitudinal and transverse lap joint distance between adjacent layers shall be more than 300 mm, and the lap joint distance of the same layer shall not be less than 500 mm.
Hand pasting technology of FRP air duct
1) 首先在模具成型面上涂抹脱模剂(或在模具外表面包上一层透明的玻璃纸)，待充分干燥后，将加有引发剂(或固化剂)、促进剂等添加剂均匀涂刷在模具成型面上，随之在其上铺放裁剪好的玻璃布。然后在铺好的玻璃布上再涂刷氯氧镁水泥，并注意驱除气泡。涂刷好氯氧镁水泥浆后再铺上剪好的玻璃布，如此重复上述操作，直到达到设计和规范厚度。
1) first, apply mold release agent (or a layer of transparent cellophane on the surface of the mold) on the molding surface of the mold. After the mold is fully dried, evenly brush additives such as initiator (or curing agent) and accelerator on the molding surface of the mold, and then lay the cut glass cloth on it. Then brush magnesium oxychloride cement on the paved glass cloth, and pay attention to eliminate the bubbles. After brushing the magnesium oxychloride cement slurry, lay the cut glass cloth, repeat the above operations until the design and specification thickness are reached.
2) 风管表层浆料厚度以压平玻璃纤维网格布纹理为宜(可见布纹)。管壁表面不允许有密集气孔和漏浆，以避免承受弯曲拉应力(正风压)、弯曲压应力(负风压)时的应力集中。
2) the thickness of the slurry on the surface of the air duct is appropriate to flatten the glass fiber grid texture (visible texture). Dense pores and leakage of slurry are not allowed on the surface of pipe wall to avoid stress concentration under bending tensile stress (positive wind pressure) and bending compressive stress (negative wind pressure).
3) 管体与法兰转角处应有过渡圆弧，过渡圆弧半径应为壁厚的0.8~1.2倍，才能提高悬臂状态法兰承载能力和避免应力集中。要求风管法兰处的玻璃纤维网格布应延伸至风管管体上。
3) there should be transition arc at the corner of pipe body and flange, and the radius of transition arc should be 0.8 ~ 1.2 times of the wall thickness, so as to improve the bearing capacity of cantilever flange and avoid stress concentration. It is required that the fiberglass mesh at the duct flange shall be extended to the duct body.
4) 玻璃纤维网格布长度、宽度不够时一定要采取搭接的方法，才能提高搭接处的切向承载能力，从而有效地克服径向拉应力、弯曲接应力和弯曲切应力。玻璃纤维布在接缝处的搭接长度一般为50~100mm;而且每层玻璃纤维布接缝处与相邻层接缝应有一定距离。相邻层之间的纵、横搭接缝距离应大于300mm，同层搭接缝距离不得小于500mm。
4) when the length and width of glass fiber gridding cloth are not enough, the method of lapping must be adopted to improve the tangential bearing capacity of lapping, so as to effectively overcome the radial tensile stress, bending joint stress and bending shear stress. The lap length of fiberglass cloth at the joint is generally 50-100mm, and there should be a certain distance between the joint of each layer of fiberglass cloth and the joint of adjacent layers. The longitudinal and transverse lap joint distance between adjacent layers shall be more than 300 mm, and the lap joint distance of the same layer shall not be less than 500 mm.
