JPH059679U - Slurry coating device - Google Patents

Abstract

(57) [Summary] (Modified) [Purpose] The uniformity of the coating thickness of the slurry is improved by preventing the formation of film-like solidified substances on the surface layer of the slurry, and the productivity of the slurry film coating product is improved. To do. [Structure] A dam portion 12 is provided along an upper edge 14 of a hopper portion 11 for storing the slurry 100 supplied from a liquid feed pipe 13.
The slurry surface layer portion accumulated inside supplies a uniform amount of slurry while flowing over the upper edge and along the inclined surface of the dam portion. Further, the lid 20 is provided in the upper opening of the hopper portion.
And the rectifying member 25 is attached to the back surface thereof. The rectifying member 25 has an elongated trapezoidal or triangular shape,
The tip is immersed in the slurry to prevent air contact on the surface and at the same time regulate the flow of the slurry.

Description

[Detailed description of the device]

[0001]

[Industrial applications]

  The present invention provides a ceramic powder slurry with a uniform thickness on the surface of a resin sheet, for example. Slurry coating device for coating slurry, etc., especially for uniformly supplying slurry Regarding the improvement of.

[0002]

[Prior art]

  For example, when manufacturing a green sheet as a base of an insulating circuit board or electronic element , Apply the ceramic powder slurry on the surface of the resin sheet, etc. with a uniform thickness. Is dried to produce a green sheet. This uniform thickness ceramic powder slurry A conventional slurry coating device for coating a resin sheet on the surface of As shown in the enlarged cross-sectional view of FIG. 3, the ceramic powder supplied into the hopper unit 1 The slurry 2 flows out from the upper edge 3 which forms one side of the upper opening, and the dam portion 4 tilts. It is formed into a film with a uniform thickness on the beveled surface, and is applied on the surface of the resin sheet not shown To be clothed.

[0003]

[Problems to be solved by the device]

  However, in the above-mentioned conventional apparatus, the thickness of the applied slurry is There was a problem that it was often uneven. That is, the above green sheet In the slurry coating device used for manufacturing, etc., a quick-drying slurry is used as the slurry 2. Has been. In addition, the vicinity of the direction opposite to the dam portion 4 at the upper opening of the hopper portion 1 (in the figure) The flow of the slurry 2 in (indicated by reference numeral 5) is relatively slow. The slurry 2 comes into contact with air, and a film-like solidified substance is generated in the surface layer portion. And this The film-like solidified material on the surface of the slurry 2 often flows over the upper edge 3 into the dam portion 4. However, this causes stripe-shaped unevenness of film thickness (so-called stripe defect).

[0004]   Therefore, in the present invention, in view of the problems in the above-mentioned conventional technology, the slurry surface layer part is Eliminates the occurrence of film-like coagulation in the film, does not cause streaky non-uniformity of film thickness, etc. It is an object of the present invention to provide a slurry coating device capable of coating slurry with the above.

[0005]

[Means for Solving the Problems]

  That is, in order to achieve the above-mentioned object, in the present invention, the slurry supplied from the outside is supplied. A hopper part for storing the lee and a dam part is provided along one side of the upper edge of the hopper part. The surface layer of the slurry accumulated in the hopper is the upper edge of the hopper. Flows out and supplies a slurry film of uniform thickness along the inclined surface of the dam section. In the slurry coating device, the hopper is placed along the upper opening of the hopper. A rectifying means for contacting the surface of the slurry accumulated in the We propose a rally coating device.   More specifically, at least the lower end portion of the rectifying means is inside the hopper portion. It is immersed in the accumulated slurry.

[0006]

[Action]

  According to the slurry coating apparatus of the present invention, the upper opening of the hopper section is The rectifying means is in contact with the surface of the slurry accumulated in the hopper, Since it is installed along the upper opening, the upper edge of the hopper portion is The slurry that flows out to the humm comes into contact with air at the upper opening of the hopper. Never. Therefore, without forming a film-like solidified product in the surface layer of the slurry, A slurry film having a uniform thickness is always supplied.   Further, the rectifying means is immersed in the slurry accumulated in the hopper portion. By being installed, the effect of blocking the surface of the slurry from the air and the rectifying effect are remarkable Can be

[0007]

【Example】

  Hereinafter, embodiments of the present invention will be described in detail with reference to the drawings.   FIG. 2 shows an external view of a slurry coating apparatus which is an embodiment of the present invention. As also shown in the drawing, this slurry coating device has a width direction (perpendicular to the slurry flow. Direction), and a cubic hopper portion 11 having an opening at the top thereof, and this hopper The dam portion 12 is provided between the side walls 18 and 19 of the base portion 11. This hot A liquid-state ceramic powder slurry is externally supplied to the par portion 11 on its back wall. A liquid delivery pipe 13 for attaching the slurry is attached to the inside of the hopper portion 11 so that the slurry can be collected every hour. It is supplied in a fixed amount.

[0008]   A frame body 15 is provided above the hopper portion 11, and a lid body 20 is provided on the frame body 15. Can be attached. Also, as apparent from this figure In addition, the slurry flowing out from the upper edge 14 of the hopper portion 11 collects in the dam portion 12. A resin sheet that runs down an inclined surface and passes under the dam 12 in the direction of the arrow It is applied as a film of uniform thickness on the surface of 30. Further, in the figure, reference numeral 2 Reference numeral 5 is a rectifying member provided on the back surface of the lid 20.

[0009]   Next, the coating operation of the slurry coating apparatus according to the present invention will be described. Figure 1, the slurry automatically supplied from the liquid delivery pipe 13 into the hopper portion 11 -100 accumulates inside the hopper section 11 and gradually rises to its surface, The layer part flows out beyond the upper edge 14 and flows down the inclined surface of the dam part 12. It At this time, the rectifying member 25 provided on the back surface of the lid 20 is attached to the hopper portion 11. Since the surface of the slurry 100 accumulated inside is in contact with the surface of the slurry 100, Contacting the surface with air is avoided.

[0010]   Further, the lower end portion of the rectifying member 25 has a shape similar to that of the so-called drop lid. Since it is immersed in the slurry 100 accumulated in the upper part 11, As shown by the arrow, the flow of the slurry 100 inside the hopper 11 is stagnated. Without rectifying, the surface layer of the slurry 100 is sequentially damped over the upper edge 14. It flows to the part 12. Therefore, for example, even if the slurry 100 is a quick-drying one, , The flow is stagnant, or the surface of the slurry 100 is solidified by touching air, It is possible to reliably prevent the formation of a film-like solidified product on the surface layer of the stagnation.

[0011]   The rectifying member 25 provided on the back surface of the lid body 20 can be seen from the figure, for example. As is apparent, the cross-section is substantially trapezoidal provided along the upper edge 14 of the hopper portion 11. Is a long member. However, the present invention is not limited to such a shape. However, even if the rectifying member 25 has a substantially triangular cross section, the same effect can be obtained. Play. In this case, the lower end portion of the rectifying member 25 has the accumulated slurry 100. It is necessary to be immersed in.

[0012]

[Effect of device]

  As is clear from the above detailed description, according to the slurry coating device of the present invention, , Slurry such as green sheet, etc. by eliminating the non-uniformity of the thickness of the slurry coating film surface It is possible to improve the uniformity of the film thickness.

[Brief description of drawings]

FIG. 1 is a partially enlarged sectional view taken along the line AA showing the operation of a slurry coating apparatus according to an embodiment of the present invention.

FIG. 2 is a partially exploded perspective view showing the overall structure of the slurry coating apparatus according to the embodiment of the present invention.

FIG. 3 is a partially enlarged cross-sectional view showing a part of a conventional slurry coating device in an enlarged manner in order to explain problems in the conventional technique.

[Explanation of symbols]

11 Hopper part 12 dam section 13 Liquid delivery pipe 14 Upper edge 20 lid 25 Rectifying member 100 slurry

Claims (4)

[Reference number] 0030163-01 [Scope of utility model registration request] 1. A hopper portion for storing slurry supplied from the outside and a dam portion are provided along one side of an upper edge of the hopper portion, and a surface layer portion of the slurry accumulated in the hopper portion is on the hopper portion. In a slurry coating device that flows out from the edge and supplies a slurry film having a uniform thickness along the inclined surface of the dam part, along the upper opening of the hopper part, on the surface of the slurry accumulated in the hopper part. A slurry coating apparatus having a rectifying means in contact therewith. 2. The slurry coating apparatus according to claim 1, wherein the rectifying means is an elongated member provided along the upper edge of the hopper section and having a substantially trapezoidal cross section. 3. The slurry coating apparatus according to claim 1, wherein the rectifying means is an elongated member provided along an upper edge of the hopper portion and having a substantially triangular cross section. 4. The slurry coating apparatus according to claim 1, wherein at least the lower end portion of the rectifying means is immersed in the slurry accumulated in the hopper portion.