Manufacturing device for a light guide plate

Patent metadata

Field	Value
Publication number	US-9475240-B2
Application number	US-201313974309-A
Country	US
Kind code	B2
Filing date	Aug 23, 2013
Priority date	Jun 7, 2013
Publication date	Oct 25, 2016
Grant date	Oct 25, 2016

Abstract

A manufacturing device includes a feeder, a first pressing roller, a second pressing roller, a third pressing roller, a transmission assembly, and a driving assembly. The first pressing roller and the second pressing roller cooperatively press a hot melt adhesive from the feeder to obtain a preprocessed light guide plate. A temperature of the second pressing roller is lower than a temperature of the hot melt adhesive. The third pressing roller separates the preprocessed light guide plate from the second pressing roller to obtain a light guide plate. The transmission assembly connects the second pressing roller and the third pressing roller. The driving element is connected to the transmission assembly, and drives the transmission assembly to rotate the third pressing roller around the second pressing roller, and thus adjusting a contact area and a contact time between the light guide plate and the second pressing roller.

First claim

What is claimed is:

1. A manufacturing device for a light guide plate, comprising:
a feeder for providing a hot melt adhesive;
a first pressing roller;
a second pressing roller, and the first pressing roller and the second pressing roller cooperatively pressing the hot melt adhesive to form a preprocessed light guide plate, wherein a temperature of the first pressing roller and a temperature of the second pressing roller are lower than a temperature of the hot melt adhesive;
a third pressing roller configured for separating the preprocessed light guide plate from the second pressing roller to obtain a light guide plate;
a transmission assembly connecting the second pressing roller and the third pressing roller;
a driving element connected to the transmission assembly, and configured for driving the transmission assembly to rotate the third pressing roller around the second pressing roller, and thus adjusting a contacting area and a contacting period between the light guide plate and the second pressing roller to cool the light guide plate; and
a guiding assembly;
wherein the first pressing roller has a first central axis, the first pressing roller being capable of rotating around the first central axis, the second pressing roller has a second central axis, the second pressing roller being capable of rotating around the second central axis, the third pressing roller has a third central axis, and the third pressing roller is capable of rotating around the third central axis, the first central axis, the second central axis, and the third central axis are parallel to each other, the guiding assembly comprises a substrate and two guiding rails positioned on the substrate, the transmission assembly comprises a first shaft, a second shaft, a third shaft, a first connecting pole, a second connecting pole, and a third connecting pole, the first shaft is fixed to the second central axis, the second shaft is fixed to the third central axis, two opposite ends of the third shaft are slidably received in the two guiding rails, the first connecting pole is directly connected to the first shaft and the second shaft, the second connecting pole directly connects the second shaft and the third shaft, the third connecting pole connects the third shaft and the driving element, the driving element is configured for driving the third connecting pole to push the third shaft slide along the guiding rails, the second connecting pole is configured for pushing the second shaft to drive the third pressing roller to rotate around the second central axis of the second pressing roller.

2. The manufacturing device of claim 1 , wherein a molding channel is formed between the first pressing roller and the second pressing roller, the hot melt adhesive from the feeder enters the molding channel to be pressed by the first pressing roller and the second pressing roller.

3. The manufacturing device of claim 2 , wherein the first pressing roller has a first circumferential surface, the second pressing roller has a second circumferential surface, the hot melt adhesive is pressed by the first circumferential surface and the second circumferential surface.

4. The manufacturing device of claim 1 , wherein a separating channel is formed between the second pressing roller and the third pressing roller, the second pressing roller is configured for guiding the preprocessed light guide plate to the separating channel.

5. The manufacturing device of claim 3 , wherein the first circumferential surface has a plurality of first molding patterns, and the light guide plate has a plurality of first micro structures coupled with the first molding patterns.

6. The manufacturing device of claim 5 , wherein the second circumferential surface has a plurality of second molding patterns, and the light guide plate has a plurality of second micro structures coupled with the second molding patterns.

7. The manufacturing device of claim 6 , wherein each of the first molding patterns is a striped protrusion having a V-shaped cross-section, and each of the second molding patterns is a striped protrusion having a V-shaped cross-section.

8. The manufacturing device of claim 1 , wherein the first pressing roller is substantially cylindrical, and defines a plurality of first through holes for receiving a first liquid for heating the first pressing roller to be a predetermined temperature which is greater than a room temperature and is less than the temperature of the hot melt adhesive.

9. The manufacturing device of claim 8 , wherein the second pressing roller is substantially cylindrical, and defines a plurality of second through holes for receiving a second liquid for heating the second roller to be a predetermined temperature which is greater than room temperature and is less than the temperature of the hot melt adhesive.

10. The manufacturing device of claim 1 , further comprising a plurality of guiding rollers configured for guiding the light guide plate to a predetermined position from the separating channel.

11. The manufacturing device of claim 1 , wherein the driving element is a hydro-cylinder or a driving motor.

Assignees

• Hon Hai Prec Ind Co Ltd

Inventors

• Hsu Chia-Ling

Classifications

• B29D11/00663 Primary

  Production of light guides · CPC title

• B29C2043/463

  corrugated, patterned or embossed surface · CPC title

• B29C43/24

  Calendering · CPC title

• B29C43/222

  characterised by the shape of the surface · CPC title