发明名称 |
Method for forming a pipe |
摘要 |
A method for manufacturing plastic pipe such that the pipe has apertures formed therein when the pipe is viewed in cross-section, comprising the steps of having hot plastic flow through a die and subsequently be extruded through a die head to form an extruded wall component having first and second end wails, with the die head having formed therein a plurality of first sized gaps and a plurality of second sized gaps, with the second sized gaps having an aperture located inside each of said second sized gaps. The die is secured to a manifold assembly, with the manifold assembly comprising sets of tubes located centrally of one another, each set of tubes comprising a water inlet tube, a tube through which a vacuum is pulled, and a water return tube. Each set of tubes is positioned longitudinally within a respective die manifold tube with the outermost surface of each set of tubes spaced a first distance from the respective die manifold tube. Each of the respective die manifold tubes extends through the die. |
申请公布号 |
US5505897(A) |
申请公布日期 |
1996.04.09 |
申请号 |
US19940224553 |
申请日期 |
1994.04.07 |
申请人 |
ADVANCED DRAINAGE SYSTEMS, INC. |
发明人 |
WISE, JOHN;MARTIN, LARRY L. |
分类号 |
B29C47/00;B29C47/20;B29C47/90;(IPC1-7):B29C47/90;B29C53/58 |
主分类号 |
B29C47/00 |
代理机构 |
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代理人 |
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主权项 |
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地址 |
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