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Casting device, and solution casting method and apparatus

A technology of casting and casting molds, applied in application, coating, household appliances, etc., can solve the problems of poor work efficiency, reduced production efficiency, and limited efficient production, so as to prevent uneven thickness and pressure fluctuating effect

Inactive Publication Date: 2009-09-09
FUJIFILM CORP
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Therefore, the quality of the membrane decreases
In addition, the distance between the initial position of the labyrinth seal and the position of the labyrinth seal after descending varies with time, so it is difficult to adjust the position of the labyrinth seal in consideration of the descending
Therefore, the time required for adjustment becomes longer and the production efficiency decreases
[0009] Therefore, in the method for adjusting the gap between the carrier and the decompression chamber to a predetermined level to prevent the pressure fluctuation inside the decompression chamber in the casting process, the work efficiency is poor, and there is a limit to efficiently producing the film

Method used

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  • Casting device, and solution casting method and apparatus
  • Casting device, and solution casting method and apparatus
  • Casting device, and solution casting method and apparatus

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0071] (experiment 1)

[0072] In Experiment 1, using Figure 11 The decompression chamber 100 shown in. The decompression chamber 100 is composed of a housing 101 and a transverse labyrinth baffle 77 . The case 101 is a box, and is set on the carrier 102 . The casing 101 is composed of a top plate, a pair of side plates, and a front plate. Each of the bottom and the rear of the housing 101 has an opening, and the chamber 101a is exposed outside through each opening. A lateral labyrinth baffle 77 is provided on the rear side of the housing 101 having an opening to close the opening. A pair of side panels and a front panel are arranged to face the carrier 102 . Therefore, the chamber 101a is substantially airtight. The lateral labyrinth baffle 77 is composed of four sealing members 85 arranged in close contact with each other in the X-up direction. Thus, forming 3 Figure 5 The labyrinth groove 87 shown in. Note that in order to prevent the complexity of the drawings, in...

Embodiment approach 2

[0081] (Experiment 1)

[0082] The duct suction air flow rate V measured at a predetermined decompression degree P was examined under the same conditions as those of Experiment 1 of Example 1, except that the position of the lateral labyrinth baffle 77 was adjusted so that the sealing gap G was Half of the sealing gap G in Experiment 1 of Example 1.

[0083] (experiment 2)

[0084] The duct suction air flow rate V measured at a predetermined degree of decompression P was examined under the same conditions as those of Experiment 2 of Example 1, except that the position of the lateral labyrinth baffle 91 was adjusted so that the sealing gap G was Half of the sealing gap G in Experiment 2 of Example 1.

[0085] (Experiment 3)

[0086] The duct suction air flow rate V measured at a predetermined degree of decompression P was examined under the same conditions as those of Experiment 2 of Example 1, except that the position of the sealing member was adjusted so that the seal gap ...

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Abstract

The invention provides a casting device, and a solution casting method and an apparatus. A casting drum is rotated around a shaft. A peripheral surface of the casting drum moves in an X direction. A dope is discharged through a casting die onto the peripheral surface. A casting bead is formed so as to extend from a discharge port of the casting die to the peripheral surface. A decompression chamber decompresses an upstream side from the casting bead. Air flowing toward the casting bead is generated at the vicinity of the peripheral surface. A lateral labyrinth plate is disposed at a clearancebetween the decompression chamber and the peripheral surface. The lateral labyrinth plate is provided with a labyrinth groove extending along a width direction of the casting bead. An edge portion for forming the labyrinth groove has a cross section with an acute angle in a direction of air flowing between the decompression chamber and the support.

Description

technical field [0001] The invention relates to a casting device, a solution casting method and equipment. Background technique [0002] Polymer films (hereinafter referred to as films) have advantages such as excellent light transmission properties and flexibility, and are easily made lighter and thinner. Therefore, the film is widely used as an optical functional film. As a representative of the film, a cellulose ester film using cellulose acylate or the like has excellent toughness, and a phase difference in the cellulose ester film is small. Therefore, cellulose ester films are used as substrates for photosensitive materials. In addition, the cellulose ester film is used as a protective film or an optical compensation film in a polarizing filter as a component of a liquid crystal display (LCD) whose market is expanding recently. [0003] As a film production method, there are mainly a melt extrusion method and a solution casting method. In the melt extrusion process,...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08J5/18B29C41/24B29C41/34B29K1/00B29L7/00
CPCB29C41/26B29K2001/00
Inventor 落合昭纪
Owner FUJIFILM CORP
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