Title:
冷却プラグの真空制御及び温度制御を用いたパイプ成形システム
Document Type and Number:
Japanese Patent JP4594322
Kind Code:
B2
Abstract:
A pipe mold (1) produces plastic pipe with an internal wall having a first wall portion (23, 25) and a second wall portion (27). The pipe mold (1) includes a two stage cooling plug (35) to assist in setting the pipe wall. The first cooling stage (37) is controlled to remove heat from the pipe wall to partially set the plastic without excessive cooling. The partially set plastic pipe then passes over a second stage (39) where less precision in the cooling of the pipe occurs. The partially set plastic is more tolerant and subject to less damage. Preferably both the first and second stages (37, 39) include separate temperature sensors (120, 122) and control arrangements (124, 126) for varying the cooling medium of each stage. In a preferred embodiment a cooling medium is circulated through a first stage at a temperature and at a flow rate to maintain the first stage (37) within a narrow temperature range about the temperature of the cooling medium. The staged cooling plug (35) allows better control at initial startups and with varying operating conditions.
Inventors:
Rupke, Manfred, A..
Rupke, Stefan, A.
Rupke, Stefan, A.
Application Number:
JP2006540122A
Publication Date:
December 08, 2010
Filing Date:
November 24, 2004
Export Citation:
Assignee:
Rupke, Manfred A., A.
Rupke, Stefan, A.
Rupke, Stefan, A.
International Classes:
B29C48/30; B29C48/90; B29C48/92; B29C48/96; B29C49/00; B29D23/00; B29C48/09; B29L23/18
Domestic Patent References:
| JP62167024A | ||||
| JP9503455A | ||||
| JP61148036A |
Foreign References:
| US4510013 |
Attorney, Agent or Firm:
Okabe
Masao Okabe
Nobuaki Kato
Shinichi Usui
Takao Ochi
Teruhisa Motomiya
Seiichiro Takahashi
Koji Yoshizawa
Takao Matsui
Masao Okabe
Nobuaki Kato
Shinichi Usui
Takao Ochi
Teruhisa Motomiya
Seiichiro Takahashi
Koji Yoshizawa
Takao Matsui