| 发明名称 |
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| 摘要 |
The present invention relates to a method and an apparatus for tubularly drawing a tubular raw material (10) of thermoplastic resin. Gas for forming a bubble to heatingly draw the tubular raw material is injected into the raw material from a direction opposite to a direction for tansferring the raw material through a nozzle. The raw material (10) is cut into a plurality of web-like pieces by cutting blades provided on pinch rolls (3) for taking up the raw material. One of the web-like pieces (10A) thus cut is separated from the others and formed with an opening into which the nozzle (7) is inserted to inject the gas. |
| 申请公布号 |
JPH052498(B2) |
申请公布日期 |
1993.01.12 |
| 申请号 |
JP19870227786 |
申请日期 |
1987.09.11 |
| 申请人 |
IDEMITSU PETROCHEMICAL CO |
发明人 |
IWAI AKYUKI;TAKASHIGE MASAO;TAKECHI EISHIN;TAKAI YASUO;SASAKI YOSHINORI |
| 分类号 |
B29C55/26;B29C53/10;B29C69/00;B29L7/00 |
主分类号 |
B29C55/26 |
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