SYRINGE FORMING MOLD - DAIKYO SEIKO LTD

Title:

SYRINGE FORMING MOLD

Document Type and Number:

WIPO Patent Application WO/2008/032853

Kind Code:

A1

Abstract:

A syringe forming mold in which a channel of cooling water for cooling a core cylinder is disposed close to a cavity space to thereby ensure a satisfactory circulating flow rate of cooling water. Slide cores (5,5) are placed at a position protruding from the circumferential plane of core cylinder (2) by penetration manipulation of slide core manipulation jig (4) along the axial direction of the core cylinder (2). While cooling the core cylinder (2) by cooling water, a molten resin is injected into cavity space (C) around the core cylinder (2). Thus, there is formed a syringe of two-drug mixing type injector furnished at its inner circumferential surface with a communication groove for mixing two drugs. As the cooling water channel is provided in partition around a jig accommodating space within the core cylinder (2), the channel lies close to the cavity space and the section of the channel can be made large to thereby ensure a satisfactory circulating flow rate of cooling water. Therefore, forming failure due to unsatisfactory cooling of the core cylinder (2) can be prevented.

Inventors:

TOGASHI HIROSHI
SUDO MORIHIRO

Application Number:

PCT/JP2007/068024

Publication Date:

March 20, 2008

Filing Date:

September 11, 2007

Export Citation:

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Assignee:

DAIKYO SEIKO LTD (JP)
TOGASHI HIROSHI
SUDO MORIHIRO

International Classes:

B29C33/44; A61M39/00; B29C33/04; B29C33/76

Foreign References:

JPH08132444A	1996-05-28
JPS5187562A	1976-07-31
JPS5167373A	1976-06-10
JPS59136216A	1984-08-04
JPH0444816A	1992-02-14
JPH0735021U	1995-06-27
JP2005288908A	2005-10-20
JPH08132444A	1996-05-28

Other References: