Slot die for film manufacturing

• US 9,434,098 B2
• Filed: 12/16/2014
• Issued: 09/06/2016
• Est. Priority Date: 05/29/2014
• Status: Active Grant

• Current Assignee: Samsung Electronics Co. Ltd.
• Original Assignee: Samsung Electronics Co. Ltd.
• Inventors: Choi, Sung Won, Nam, Jae Wook, Song, Sun Jin, Lee, Semi, Sohn, Byung Hee, Ahn, Chan Jae, Hong, Sung Woo
• Primary Examiner(s): Gupta, Yogendra
• Assistant Examiner(s): LEYSON, JOSEPH S
• Application Number:
  US14/571,475
• Publication Number:
  US 20150343689A1
• Time in Patent Office: 630 Days
• US Class Current: 1/1
• CPC Class Codes: B29C 2948/926 Flow or feed rate
• CPC Class Codes: B29C 2948/92904 Die; Nozzle zone
• CPC Class Codes: B29C 48/08 flexible, e.g. films
• CPC Class Codes: B29C 48/305 having a wide opening, e.g. for forming sheets
• CPC Class Codes: B29C 48/92 Measuring, controlling or regulating
• CPC Class Codes: B29L 2007/008 Wide strips, e.g. films, webs

Abstract

A slot die includes a material distribution chamber configured to distribute a casting solution supplied to the material distribution chamber, and a lip in which a slot including an expansion portion is defined and through which the casting solution distributed in the material distribution chamber is discharged, where a width of the expansion portion taken in a first direction is expanded from one side of the expansion portion to a lip end facing the one side and the one side of the expansion portion is apart from the lip end by a predetermined length taken along a second direction which is perpendicular to the first direction and substantially parallel to a flow direction of the casting solution.

Claims

1. A slot die comprising:

a material distribution chamber configured to distribute a casting solution supplied to the material distribution chamber; and

a lip in which a slot including an expansion portion is defined and through which the casting solution distributed in the material distribution chamber is discharged, wherein a width of the expansion portion taken along a first direction is expanded from one side of the expansion portion to a lip end facing the one side, and the one side of the expansion portion is apart from the lip end by a predetermined length taken along a second direction which is perpendicular to the first direction and substantially parallel to a flow direction of the casting solution, wherein the expansion portion of the lip includes width-directional wall surfaces, where the width-directional wall surfaces define the slot, and at least one of the width-directional wall surfaces is inclined with a predetermined inclination angle with respect to the second direction, and the predetermined inclination angle is greater than about 0 degree and equal to or smaller than about 10 degrees.

2. The slot die of claim 1, wherein the width of the expansion portion is gradually decreased corresponding to the predetermined length from the lip end to the one side of the expansion portion.

3. The slot die of claim 1, wherein both of the width-directional wall surfaces of the expansion portion of the lip defining the slot are inclined with a predetermined inclination angle with respect to the second direction.

4. The slot die of claim 3, wherein the predetermined length is about 1 millimeter to about 3 millimeters.

5. The slot die of claim 1, wherein only one of the width-directional wall surfaces of the lip defining the slot is inclined with a predetermined inclination angle with respect to the second direction at the expansion portion.

6. The slot die of claim 5, wherein the predetermined length is about 1 millimeter to about 3 millimeters.

7. The slot die of claim 1, further comprising a device controller configured to control an amount of the casting solution discharged through the lip.