公开(公告)号：DE602004016583D1

公开(公告)日：2008-10-30

申请号：DE602004016583

申请日：2004-01-19

Applicant: ESSILOR INT

Inventor： HUARD MARC ,  DA SILVA GRACIO ,  DARMES DANIEL

IPC: B29C39/02 ,  B29C31/04 ,  B29D11/00 ,  B29C39/00 ,  B29C39/24 ,  B29C39/44

Abstract: The procedure consists of a staged flow, starting from zero with an initial flow (A) and leading to a nominal flow rate (Dn) of over 40 grams per minute (g/min) which is maintained for a period (B) during which the mold is filled, and a final reduced flow (C) coming back to zero. The initial flow stage (A) has two phases: a first phase (A1) in which the mold is filled to a depth of of at least 2 mm, and preferably up to 7 mm, in its deepest part at a flow rate of under 20 g/min, followed by a second phase (A2) in which the flow rate is increased to nominal (Dn). The first phase itself is divided into two sections: a first section (A11) building up from zero to a first flow rate (Dd) of some 3 - 8 g/min, and a second section (A12) in which the first flow rate is maintained for a period of 4 - 10 seconds. The mold cavity is filled through a needle valve and an orifice in its base, and the polymerization of the molded material is initiated immediately after the cavity is filled.

公开(公告)号：FR2850319B1

公开(公告)日：2005-03-04

申请号：FR0300802

申请日：2003-01-24

Applicant: ESSILOR INT

Inventor： HUARD MARC ,  DA SILVA GRACIO ,  DARMES DANIEL

IPC: B29C31/04 ,  B29C39/00 ,  B29C39/02 ,  B29C39/24 ,  B29C39/44 ,  B29D11/00

Abstract: The procedure consists of a staged flow, starting from zero with an initial flow (A) and leading to a nominal flow rate (Dn) of over 40 grams per minute (g/min) which is maintained for a period (B) during which the mold is filled, and a final reduced flow (C) coming back to zero. The initial flow stage (A) has two phases: a first phase (A1) in which the mold is filled to a depth of of at least 2 mm, and preferably up to 7 mm, in its deepest part at a flow rate of under 20 g/min, followed by a second phase (A2) in which the flow rate is increased to nominal (Dn). The first phase itself is divided into two sections: a first section (A11) building up from zero to a first flow rate (Dd) of some 3 - 8 g/min, and a second section (A12) in which the first flow rate is maintained for a period of 4 - 10 seconds. The mold cavity is filled through a needle valve and an orifice in its base, and the polymerization of the molded material is initiated immediately after the cavity is filled.

公开(公告)号：FR2850319A1

公开(公告)日：2004-07-30

申请号：FR0300802

申请日：2003-01-24

Applicant: ESSILOR INT

Inventor： HUARD MARC ,  DA SILVA GRACIO ,  DARMES DANIEL

IPC: B29C31/04 ,  B29C39/00 ,  B29C39/02 ,  B29C39/24 ,  B29C39/44 ,  B29D11/00

Abstract: The procedure consists of a staged flow, starting from zero with an initial flow (A) and leading to a nominal flow rate (Dn) of over 40 grams per minute (g/min) which is maintained for a period (B) during which the mold is filled, and a final reduced flow (C) coming back to zero. The initial flow stage (A) has two phases: a first phase (A1) in which the mold is filled to a depth of of at least 2 mm, and preferably up to 7 mm, in its deepest part at a flow rate of under 20 g/min, followed by a second phase (A2) in which the flow rate is increased to nominal (Dn). The first phase itself is divided into two sections: a first section (A11) building up from zero to a first flow rate (Dd) of some 3 - 8 g/min, and a second section (A12) in which the first flow rate is maintained for a period of 4 - 10 seconds. The mold cavity is filled through a needle valve and an orifice in its base, and the polymerization of the molded material is initiated immediately after the cavity is filled.