The invention discloses a preparation method of Straw filter, which comprises the following steps: preparing a Straw extrusion die, the extrusion die Straw cavity is provided with a cylindrical part of the cavity, the front end is provided with a sealing cavity, the outer side and the inner side are respectively provided with a plurality of through holes relative the hole on the external side of a cylinder, the cylinder diameter slightly smaller than the diameter of the through holes in the plastic material; molten material feeding channel is conveyed to the cavity through the sealing cavity, the front end of the cavity in the closed state, the rubber suction pipe condensed into the front. The Straw closed cylindrical; by through holes on the outer side of the through hole is inserted into the inner surface of the cavity, will be in the Straw the thorn out several filtering holes; the sliding cover, the cavity from the closed state to the open state; molten plastic The material is continued to be conveyed to the cavity so that the straw is extruded, and when the extruded straw reaches a set length, the straw is cut off to form a filter straw.
【技术实现步骤摘要】
【技术保护点】
１．一种过滤吸管的制备方法，其特征在于，其包括以下步骤：（１）制备一吸管挤出机头，该吸管挤出机头上设有一圆筒状的型腔，该吸管挤出机头的中心位置设有一中心孔，该型腔的前端部设有一封盖，该封盖能滑动使型腔处于封闭状态或开放状态，该型腔的后端连接输送熔融胶料的送料通道，该型腔的外侧面和内侧面上分别设有若干相对应的直径相同的通孔，处于内侧面上的通孔与所述中心孔相连通，该外侧面上的通孔中设有圆柱，该圆柱的直径略小于所述通孔的直径，在挤出过滤吸管的过程中，该圆柱由一自动控制装置控制插入到该内侧面上的通孔中或从该内侧面上的通孔中拔出并使该圆柱缩入到外侧面上的通孔中，此时该圆柱的末端与该外侧面的壁面相持平；（２）将处于熔融状态的胶料通过送料通道输送到该型腔中，此时型腔前端的封盖使型腔处于封闭状态，胶料在该圆筒状的型腔中由熔融状态凝结成吸管，该吸管的前端部封闭；（３）所述自动控制装置工作，控制所述圆柱由所述外侧面上的通孔插入到内侧面上的通孔中，将处于型腔中的吸管上刺出若干过滤孔，所产生的胶料碎片进入到所述中心孔中，所述自动控制装置控制该圆柱由所述内侧面上的通孔中拔出并使该圆柱缩入到外侧面上的通孔中，此时...
【技术特征摘要】
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