JPH1084U - Powder coating equipment for ceramic green sheets - Google Patents

Abstract

(57) [Summary] [Purpose] In the conventional method, it is difficult to peel off the sheet from the base film depending on the width and thickness of the sheet. An object is to provide a device which is complicated and has difficulty in workability, and solves this problem. [Structure] In a device for applying bedding powder after peeling a sheet formed on a base film, a peeling roller 4 is installed in addition to a conventional method in which a wedge-shaped sharp blade 3 is applied from the base film side. In addition, the sheet is slid on the bedding powder 6 using the weight of the bedding powder applying roller 5 in the bedding powder application.

Description

[Detailed description of the invention]

[0001]

[Industrial applications]

 This invention separates and laminates ceramic green sheets produced by the sheet casting method typified by the calendar method and the doctor blade method developed to realize the miniaturization, thinness, and measurement of electronic components from the base film. The present invention relates to an apparatus for uniformly applying a bedding powder used for peeling a fired ceramic to a sheet.

[0002]

[Prior art]

 Conventionally, a ceramic green sheet (hereinafter referred to as a sheet) can be peeled off from the base film by inserting a wedge-shaped sharp blade between the sheet and the base film, or by removing a wedge-shaped sharp edge on the base film side. A method of applying a blade and pulling the base film along the blade to bend the base film at an acute angle to separate the base film has been adopted. Conventional methods of applying powder to ceramic green sheets include rubbing the brush with the powder, rubbing the sheet with a brush after sifting the powder with a sieve, or using static electricity or corona. A method of electrically attaching the litter by electric discharge or the like, a method of attaching a litter to a litter floured by air blow through a sheet, a method of dispersing a litter in a solvent, and drying and attaching the litter through the sheet Or a method of spray coating and drying and adhering.

[0003]

[Problems to be solved by the invention]

 In the conventional sheet peeling method described above, in the former case, it is difficult to insert a blade between the sheet and the base film when the sheet width is widened. There is a drawback that a thin blade cuts the base film.In the latter case, there is no problem when the sheet is wide and the sheet is thick, but when the sheet is thin, it does not peel off simply by bending the base film at an acute angle. was there.

In addition, in the conventional litter coating method, it is difficult to supply the litter with the brush and it is not mass-produced due to unevenness in the amount of coating over time. When using a sieve, clogging cannot be prevented. It is disadvantageous to apply a relatively heavy bedding powder with a specific gravity in the case of electrical adhesion. The air blow method makes the equipment large and complicated, such as sealing the equipment in the work environment. The method of dispersing in a solvent has various drawbacks, such as compatibility with the binder used for the ceramic green sheet and a problem that many of them cannot be used with both water and organic solvents.

An object of the present invention is to eliminate all the drawbacks of the prior art, and to provide a ceramic green sheet peeling device capable of peeling from a base film without depending on the width and thickness of the sheet, and a supply amount of laying powder. An object of the present invention is to provide a litter coating apparatus which is constant, does not depend on specific gravity, is simple in apparatus, and does not use a solvent, so that the coating amount is uniform and the sheet itself is not damaged.

[0006]

[Means for Solving the Problems]

 In order to solve this problem, the present invention is based on the conventional method of fitting a wedge-shaped sharp blade to the base film side and bending the base film at an acute angle. The sheet is peeled from the base film by rotating the peeling roller installed at a distance less than the thickness of the base film and the sheet at a speed higher than the pulling speed of the base film, and only the peeled sheet has free movement. The powder is pressed against the bedding powder only by its own weight, and the sheet is fed while the sheet and the bedding powder are in close contact with each other. It is characterized by making it.

[0007]

[Action]

 According to such a configuration, when the sheet is peeled from the base film, the peeling is provided under the wedge-shaped sharp blade so that the gap is not less than the thickness of the base film and not more than the thickness of the sheet. Due to the presence of the roller, the base film can be bent at an acute angle without applying tension compared to when there is no peeling roller, and the peeling becomes easier. Furthermore, since the peeled sheet has the above-mentioned roller rotating at a higher speed than the sheet in the direction different from the winding direction of the base film, it is not rolled up with the base film in the direction of the winding axis and rides on the roller to be sent out. Will be able to In addition, in the application of bedding powder, the roller for spreading the bedding powder has free movement, and the unevenness of the bedding powder is smoothed out by the roller itself. Let it. By pulling the sheet in this state, the sheet passes between the bedding powder and the bedding powder applying roller, and the bedding powder is uniformly applied to the entire surface of the sheet. After this, the excess litter is removed with a brush or the like, but the litter application method according to the present invention makes it harder for excess litter to adhere, so that the litter is less scattered than in the conventional method. Benefits are also obtained.

[0008]

【Example】

 FIG. 1 shows a first embodiment of the present invention, wherein 1 is a base film and sheet setting section, 2 is a base film winding section, 3 is a wedge-shaped sharp blade, 4 is 3 and a base film and sheet. A separation roller installed at a gap smaller than the thickness of the sheet and rotating at a higher speed than the sheet in the same direction as the sheet feeding direction, 5 is a roller for applying litter, 6 is litter, and 7 is excess litter removal. A brush, 8 is a rubber roller for sheet feeding, 9 is a green sheet, and 10 is a base film. In the drawing, the rollers with the rotation direction arrows in the rollers indicate that a driving motor is provided (only the 2.4.7.8 rollers in the drawing have a motor). FIG. 2 shows the present invention. This is a second embodiment of the present invention, in which powder is applied to both sides after the sheet is peeled off from the base film. FIG. 3 shows a third embodiment of the present invention, in which a spread powder is applied to one side of a sheet with a base film attached, and after the peeling, a spread powder is applied to the other side. This is a particularly effective method when the object is very thin.

Since FIG. 1 to FIG. 3 are structurally the same, FIG. 1 will be described below. The green sheet and the base film are set so that the state shown in FIG. 1 is obtained. First, the roller 4 and the brush 7 are rotated, and then the base film winding unit 2 and the sheet feeding roller 8 are simultaneously rotated. At this time, the sheet feeding roller 8 is set at a constant speed (the roller outer peripheral speed is fixed at a (m / min)), and the roller 4 is fixed at an outer peripheral speed of 1.1 × a (m / min) or more. When the outer peripheral speed of the roller 4 was 1.0 × a (m / min) or less, the sheet edge did not peel off from the base film, and the sheet was sometimes torn. In addition, it was confirmed that no problem occurred even if the rotation was performed at a higher speed (up to 20 × a (m / min) in the experiment). The brush 7 may be rotated at a constant speed, and there is no limitation on the speed. Since the outer periphery of the base film take-up section 2 becomes larger as the base film is taken up, the speed can be varied by the amount of slack of the sheet provided immediately after the roller 4.

If the weight (M) of the spread powder applying roller 5 is too light, the roller 5 does not rotate and the unevenness of the spread powder cannot be smoothed, resulting in uneven coating. The minimum weight (Ms) required for rotation was required, and M = (1.1-3.0) × Ms was good in the experiment. If 1.0 × Ms <M <1.1 × Ms, the roller 5 may be difficult to rotate, resulting in partial application unevenness. Also,. When M> 3.0 × Ms, there is no problem in the rotation of the roller 5, but there is a problem that the sheet is easily damaged because the sheet passes over the litter. Due to such a configuration, a sheet of 20 to 250 μm / t can be peeled off from the base film, and bedding powder that can be peeled off after laminating and firing is applied to one side of the sheet without damaging the sheet. It has become possible to apply it continuously on both sides uniformly.

[0011]

[Effect of the invention]

 With the configuration described above, the sheet can be peeled from the base film regardless of the thickness and width of the sheet in the step of peeling the ceramic green sheet and spreading the powder, and without using a complicated device, and This has a practical advantage that the powder can be applied uniformly and continuously without causing damage.

[Brief description of the drawings]

FIG. 1 is a schematic view of a first embodiment of the present invention (for applying powder on one side).

FIG. 2 is a schematic view of a second embodiment of the present invention (for applying powder on both sides).

FIG. 3 is a schematic view of a third embodiment of the present invention.

[Explanation of symbols]

DESCRIPTION OF SYMBOLS 1 Set part of base film and ceramic green sheet 2 Base film winding part 3 Wedge-shaped sharp blade 4 Roller for release 5 Roller for spreading powder 6 Spreading powder 7 Brush for removing excess spreading powder 8 Rubber feeding roller for sheet feeding 9 Ceramic green sheet 10 Base film

Claims (1)

[Utility model registration claims] An apparatus for uniformly applying a litter after peeling a ceramic green sheet wound up together with a base film from the base film, wherein a wedge-shaped sharp blade is applied to the base film side to form a base film. Is bent along the blade to the side opposite to the ceramic green sheet side, and the distance between the base film and the blade is adjusted according to the thickness of the base film and the thickness of the ceramic green sheet, and is faster than the pulling speed of the base film. By having a peeling roller that rotates at a peripheral speed, the ceramic green sheet is peeled from the base film, and the ceramic green sheet peeled from the base film is pressed against the litter only by the weight of the litter coating roller that has free movement. Passing between the bedding powder and the bedding powder application roller Laying powder coating apparatus of a ceramic green sheet, characterized in that to perform the uniform laying powder coating.