摘要
以门套为例,在65锥形双螺杆UPVC微发泡配方体系条件下,通过仿真设计和生产线调试验证,研制了复杂截面表面结皮微发泡挤出模具。其中,间隙式外放发泡的水冷口模结构,通过调整水冷口模板间隙的大小和流道的长短来控制物料的流动速度,进而调节结皮厚度和制品密度;干湿定型结合的定型模中,干式定型采用反向弧度补偿发泡材料的不均匀收缩,在湿式定型段,采用浸浴式真空涡流水箱对发泡制品进行充分冷却和定型。
This article takes the door frame as an example.Under the conditions of the 65 conical twin-screw UPVC micro-foaming formula system,through simulation design and production line debugging and verification,a complex cross-section surface crusting micro-foaming extrusion mould was developed.Among them,the gap type water-cooled die structure for external foaming,the size of the gap and the length of the flow channel can control the flow rate of the materials,which can adjust the thickness of the crust layer and the product density;in the shaping mold that combines dry and wet shaping,the dry setting uses reverse curvature to compensate for the uneven shrinkage of the foam material.In the wet setting section,an immersion vacuum vortex water tank is used to cool and shape the foamed products to the greatest extent.
作者
徐军
XU Jun(Jari Automation Co.Ltd.,Lianyungang 222006,China)
出处
《新型建筑材料》
2024年第9期151-154,共4页
New Building Materials
关键词
UPVC微发泡
结皮发泡
复杂截面
挤出模具研制
UPVC micro-foam
surface crust foaming
complex cross section
extrusion mould development
