| 摘要 |
A film blowing head (1) for the production of film tubing from a single or multi-layer film, which (1) comprises at least one extrusion gap (4) to form a film layer, which (4) is embodied between to boundary walls (5, 6), with at least one melt pipeline (22) mouthing into the extrusion gap (4), which converts inside the extrusion gap (4) into a first melt channel (4), which is formed in at least one section (11, 12, 13, 14) of the progression of at least one first melt channel (10) by recesses (3, 7) in the two boundary walls (5, 6) of the extrusion gap (4), and which distributes the melt in the extrusion gap (4), while it (10) tapers in its progression in the direction of transportation of the melt (h), and finally in its (10) end section (14) entirely converts into the extrusion gap (4). Here, it is considered novel and inventive that at least one first melt channel (10) is formed at one of its sections (11, 12, 13, 14) only by recesses (3, 7) in one of its two boundary walls (5, 6).
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