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Title:
CYLINDRICAL CONCRETE FORM AND METHOD FOR PRODUCING THE SAME
Document Type and Number:
Japanese Patent JP2002201796
Kind Code:
A
Abstract:

To provide a cylindrical concrete form which is formed of a synthetic resin, reusable, and facilitates removal thereof after hardening of concrete.

The cylindrical concrete form 1 is formed of the synthetic resin, and either its outer peripheral surface or its inner peripheral surface has a spiral projection 1a formed thereon. In an apparatus for producing the cylindrical concrete form, an extruding die section includes a die mounting cylinder, an outer extruding die mounted on the die mounting cylinder, an inner extruding die housed in the outer extruding die, for controlling the flow rate of molten resin, and a cylindrical lip fixed to the outer extruding die. Then, by changing the arrangement of the inner extruding die, the flow rate of the molten resin can be adjusted.


Inventors:
TAKAHASHI MASAMI
MOGI OSAMU
MURAKAMI KIYOSHI
Application Number:
JP2000404983A
Publication Date:
July 19, 2002
Filing Date:
December 29, 2000
Export Citation:
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Assignee:
EKOPIA KK
SIGMA KIKI CO LTD
ECO WAVE KK
International Classes:
E04G9/05; B29C47/88; B29C48/325; B29C48/33; E04G11/06; E04G13/02; (IPC1-7): E04G9/05; B29C47/22; B29C47/24; B29C47/88; E04G11/06; E04G13/02
Attorney, Agent or Firm:
Shigeru Kinoshita