Ejection device comprising a chain of sliding links

Patent metadata

Field	Value
Publication number	US-2017246771-A1
Application number	US-201715442575-A
Country	US
Kind code	A1
Filing date	Feb 24, 2017
Priority date	Feb 26, 2016
Publication date	Aug 31, 2017
Grant date	—

Abstract

The ejection device comprises:
a pushing device ( 14 ) translatable along a first axis (A 1 ) between a retracted position and an ejection position, an ejection element ( 28 ) translatable along a second axis (A 2 ) between a retracted position and an ejection position, a transfer device ( 26 ) connecting the pushing device ( 14 ) and the ejection device ( 28 ).

The transfer device ( 26 ) comprises at least two links ( 44 ), translatable relative to one another and relative to the pushing device ( 14 ) and the ejection element ( 28 ).

First claim

1 . An ejection device for a mold used to produce a molded part in a molding cavity intended to allow the ejection of the molded part outside said molding cavity, said device comprising:
a pushing device translatable along a first axis between a retracted position and an ejection position, at least one ejection element translatable along a second axis, different from the first axis, between a retracted position and an ejection position, at least one transfer device connecting the pushing device and the ejection element, said transfer device being arranged to move the ejection element along the second axis between its retracted position and its ejection position when the pushing device is moved along the first axis between its retracted position and its ejection position, wherein the transfer device comprises at least two links, translatable relative to one another and relative to the pushing device and the ejection element.

2 . The ejection device according to claim 1 , wherein the transfer device comprises a guide element receiving said links, said links being moved along a movement path in said guide element by the pushing device and moving the ejection element, said links being guided in said guide element over the entire movement path.

3 . The ejection device according to claim 2 , wherein the guide element comprises at least two opposite walls each extending over the movement path.

4 . The ejection device according to claim 3 , wherein the links comprise two opposite guide surfaces, said guide surfaces respectively being in permanent contact with an opposite wall of the guide element over the entire movement path such that the links are guided in said guide element over the entire movement path.

5 . The ejection device according to claim 1 , wherein the links are identical to one another.

6 . The ejection device according to claim 1 , wherein the second axis forms a non-zero angle with the first axis.

7 . The ejection device according to claim 1 , wherein each link comprises a first sliding surface forming a translation surface with a first adjacent link and a second sliding surface forming a translation surface with a second adjacent link.

8 . The ejection device according to claim 6 , wherein each sliding surface forms an angle relative to a direction perpendicular to the first axis, said angle being negative to delay the movement of the ejection element relative to the pushing device or positive to accelerate the movement of the ejection element relative to the pushing device or zero to move the ejection element and the pushing device at the same speed.

9 . The ejection device according to claim 1 , wherein the ejection element comprises a secondary molding surface arranged to form part of the molding cavity and to mold a portion of the molded part, the movement of the ejection element in the ejection position causing the separation of the secondary molding surface from the portion of the molded part molded by said secondary molding surface.

10 . The ejection device according to claim 1 , wherein the pushing device comprises an ejection plate translatable along a direction parallel to the first axis, said ejection device further comprising an ejection rod secured to the ejection plate and arranged to move the molded part along said direction parallel to the first axis.

Assignees

• Faurecia Interieur Ind

Inventors

• Belliard Sylvain

Classifications

• B29C33/442 Primary

  with mechanical ejector or drive means therefor · CPC title

• B29C45/4435

  using inclined, tiltable or flexible undercut forming elements driven by the ejector means · CPC title

• B29C45/401

  Ejector pin constructions or mountings · CPC title

• B29C45/4005 Primary

  Ejector constructions; Ejector operating mechanisms (B29C45/44 takes precedence) · CPC title

• B29C33/44

  with means for, or specially constructed to facilitate, the removal of articles, e.g. of undercut articles · CPC title