Device for moulding lenses and method of manufacturing lenses

Patent metadata

Field	Value
Publication number	US-11141941-B2
Application number	US-201816176537-A
Country	US
Kind code	B2
Filing date	Oct 31, 2018
Priority date	Oct 31, 2017
Publication date	Oct 12, 2021
Grant date	Oct 12, 2021

Abstract

A moulding device, for forming lenses by moulding, includes: a moulding element including indentations formed in a face of the moulding element; a transparent plate held with respect to the moulding element so as to form, with the indentations, a cavity intended to allow the formation of a plurality of lenses; at least one injection passage intended to allow moulding product to be introduced into the cavity, the injection passage being arranged between the transparent plate and the moulding element; a moulding product injector arranged so as to allow moulding product to be introduced into the injection passage. The injector is removable, and the moulding device is configured so as to allow the injector to be removed while at the same time keeping the transparent plate held with respect to the moulding element.

First claim

The invention claimed is:

1. A moulding device for forming lenses by moulding, said moulding device comprising:
a moulding element comprising indentations formed in a face of the moulding element,
a transparent plate held with respect to the moulding element so as to form, with the indentations, a cavity configured to allow the formation of a plurality of lenses,
at least one injection passage configured to allow moulding product to be introduced into the cavity, the injection passage being arranged between the transparent plate and the moulding element,
a moulding product injector arranged so as to allow moulding product to be introduced into the injection passage,
wherein the injector is removable, and wherein said moulding device is configured so as to allow the injector to be removed while at the same time keeping the transparent plate held with respect to the moulding element,
the moulding device further comprising an assembly member fixing the position of the transparent plate with respect to the moulding element before and after the injector is removed from the moulding device;
wherein the assembly member comprises:
at least one first fixing member,
at least one second fixing member,
two frames between which the transparent plate is arranged, said frames being assembled with one another by said at least one first fixing member so as to clamp the transparent plate, and the assembly of the two frames clamping the transparent plate being mounted to the moulding element by said at least one second fixing member.

2. The moulding device according to claim 1 , wherein the assembly member urges the transparent plate towards a discontinuous peripheral bearing surface of the face of the moulding element wherein the indentations are formed.

3. The moulding device according to claim 1 , comprising at least one first fixing element that holds the injector with respect to the moulding element, and at least one second fixing element configured to hold the injector with respect to the transparent plate.

4. The moulding device according to claim 1 , comprising at least one first fixing element that holds the injector with respect to the moulding element, and at least one second fixing element configured to hold the injector with respect to the transparent plate, the first fixing element being a screw passing through the injector and screwed into the moulding element, and the second fixing element being a screw passing through the frames and screwed into the injector.

5. The moulding device according to claim 1 , comprising a plurality of injection passages each forming an injection channel connecting the cavity to the injector.

6. The moulding device according to claim 5 , wherein the injector comprises:
a groove closed at its longitudinal ends, and
notches, each notch being arranged so as to place the groove in fluidic communication with one of the injection passages.

7. The moulding device according to claim 6 , wherein the groove and the notches cooperate with the transparent plate to form a closed section hollow injection body.

8. The moulding device according to claim 1 , wherein the transparent plate and the moulding element form a setback where the injector is arranged.

9. The moulding device according to claim 1 , wherein:
the indentations are configured to participate in the formation of first lenses of a nonimaging optic, and the face of the moulding element wherein the indentations are formed is a first face of the moulding element,
the moulding element comprises a second face opposite to its first face,
the moulding element comprises hollows formed in its second face, the hollows being configured to participate in the formation of second lenses of the nonimaging optic,
said moulding device comprises a substrate on which optoelectronic components are connected, said substrate being mounted to the moulding element so that each optoelectronic component is associated with one of the hollows.

10. The moulding device according to claim 1 , wherein the transparent plate comprises an adhesion primer configured to allow a solidified moulding product present in the cavity to adhere to said transparent plate.

Assignees

• Commissariat Energie Atomique

Inventors

• Ritou Arnaud
• Voarino Philippe

Classifications

• Y02E10/52

  PV systems with concentrators · CPC title

• B29C33/0022

  Multi-cavity moulds (B29C33/301 takes precedence) · CPC title

• B29C2033/0005

  with transparent parts, e.g. permitting visual inspection of the interior of the cavity · CPC title

• B29C41/02

  for making articles of definite length, i.e. discrete articles · CPC title

• B29D11/00538 Primary

  Feeding arrangements · CPC title