JPH07136568A - Stripe coating method and slot die for stripe coating - Google Patents

Abstract

PURPOSE:To simultaneously form continuous coating surfaces of the same thickness free from joints in the transverse direction of a band-shaped material by segmenting a coating liquid passage consisting of manifold parts and a slit part in a transverse direction and supplying different kinds of coating liquids in the respective segmented passages. CONSTITUTION:The slot die A is constituted by forming respective grooves 4a, 4b constituting the manifold parts 4 respectively on the respective parting planes of both upper and lower dies 2, 7 constituting a die body 1 and forming the slit part 9 at the difference alpha in level of the respective parting planes. Sealing members 10 formed with slopes (a) so as to expand forward on the opposite flanks are disposed in both side parts of the slit part 9 to regulate the coating width. Further, a block member 11 consisting of a base part 12 in tight contact with the manifold parts 4 and a cylindrical part 13 segmenting the slit part 9 is disposed. The front end of the cylindrical part 13 is specified to <=5mm width (b) and is set at a prescribed specific taper (c). The coating materials of respectively different colors are supplied from, for example, two pieces of the openings S and the stripe coating of two colors is efficiently executed.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a strip coating method and a slot die for strip coating.

[0002]

2. Description of the Related Art Paper, film, aluminum, iron or other thin material strip surface,
In the case of applying different colors to stripes, in the past, a coating and coating method in which two or more kinds of paints are repeatedly coated,
A lamination method in which each color is separately coated and then the coating is laminated, a printing method in which coating is performed and then printing is partially performed, and the like are employed. However, in the above-mentioned coating-overcoating method, the coating thickness of the coating-overlapped portion becomes large, and multicolor coating is difficult. The laminating method requires a laminating step and is troublesome, and the printing method has a problem that two steps are required and the color tone of the coating portion and the printing portion is different. Therefore, it is an object of the present invention to provide a stripe coating method and a stripe coating slot die capable of performing multicolor stripe coating in one step.

[0003]

In order to achieve the above-mentioned object, the present invention provides a slot die having a coating liquid passage consisting of a manifold portion and a slit portion. It is divided in the width direction, and liquid coating compositions having different components are supplied to the respective division coating liquid passages to simultaneously form continuous coating surfaces of the same coating thickness without cuts in the width direction of the strip-shaped material. In a second aspect of the present invention, in a slot die having a coating liquid passage including a manifold portion and a slit portion, a dividable die body including an upper die and a lower die, and the upper die and the lower die are integrated. A removable seal member located at both ends of the slit portion formed by the above and closing at least the slit portion; a base portion located between the seal members and closely fitted in the manifold portion; It is configured by a detachable partitioning member formed by a body portion having a width.

[0004]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS Next, the present invention will be described with reference to the drawings which are embodiments. The figure shows one embodiment of the slot die A for stripe coating according to the present invention.
It is composed of a die body 1 including a long upper die 2 and a lower die 7 which are integrated, a sealing member 10, a partitioning member 11, and a side plate 15. A groove 4a having a semicircular cross section is formed in the longitudinal direction at the substantially center of the dividing surface (lower surface) 3 of the upper die 2, and the dividing surface 3 in front of the groove 4a is slightly ground to divide it. The surface 3 has a step α. Further, the paint supply ports 5 communicating with the groove 4a are provided at a plurality of locations, two locations in the figure.

The dividing surface (upper surface) 8 of the lower die 7 is also formed with a groove 4b having a semicircular cross section in the longitudinal direction. As will be described below, when integrated with the upper die 2, the groove 4a, 4b forms a cross section. A circular manifold portion 4 is formed, and a slit portion 9 is formed by the step α of the upper die 2.

When the upper die 2 and the lower die 7 are integrated, the seal member 10 has the step α and the lower die 7.
Slit part (paint discharge part) 9 formed by the dividing surface 8 of
It is attached to both sides of the base plate to regulate the coating width L, and is made of a rubber, plastic, or metal plate-like body, and the opposite side surfaces of the plate-like body are spread forward by 1 ° to 30 °. An inclined surface a is provided.

The partition member 11 corresponds to the seal member 10
Like rubber, plastic, or metal,
A base 12 having a circular cross section, which fits tightly to the manifold portion 4 formed when the upper die 2 and the lower die 7 are integrated, and a slit portion 9 located inside the slit portion 9. The body portion 13 has a tip having a predetermined width b of 5 mm or less, and the body portion 13 has a width of 5 ° to 60 °.
A taper c of ° is provided. Therefore, the seal member 10 is provided on both sides of the upper die 2 and the lower die 7, and
The partition member 11 is interposed in the center, and the mounting bolt 14
Both are integrated with and side plates 1 on both sides.
5 and 15 are attached by the attachment bolts 16 to close both ends of the manifold portion 4 and the slit portion 9 to form the stripe coating slot die A.

As in the prior art, the slot dies A are disposed, for example, so as to face a backing roll (not shown), and a plurality of strip dies are wound on the backing roll to be conveyed. Color stripe painting is performed. That is, paints of different colors are respectively supplied from the two paint supply ports 5 and 5, and these are two discharge ports (slit portion 9) partitioned by the partition member 11.
Is simultaneously discharged from the above to apply a two-color stripe coating having the same coating thickness without a cut in the width direction on the strip-shaped material. in this case,
Since the tip of the partitioning member 11 has a predetermined width b of 5 mm or less and the taper c is provided at the boundary between the paints, the painted parts do not overlap and are painted seamlessly. In addition, the edge portion (outside the coated surface) is 1 ° to 30
Since it has the inclined surface a of .degree., The coating can be performed without the swelling of the coating at the edge portion.

The angle of inclination a of the sealing member 10 and the angle of the tip width b and the taper c of the partitioning member 11 are appropriately determined depending on the coating conditions such as the viscosity and the coating thickness of the coating material. For example, when the viscosity is low, the tip width b is wide, and when the coating thickness is thin, the tip width b is narrow. However, as described above, the shapes of the sealing material 10 and the partition member 11 are the same as the coating conditions for stripe coating. Based on.

In the above-mentioned embodiment, the case where two-color stripe coating is carried out has been described. However, by providing a large number of paint supply ports 5 and arranging two or more partition members 11 at the same time, stripes of three or more colors are formed. Can be painted. It goes without saying that the paint supply port 5 not used is closed. Further, if the sealing member 10 is prepared to have different widths or inclination angles, and is selected according to the coating width or the coating conditions at the time of use,
It can deal with various paintings. Further, the side plate 15 can be omitted if the sealing member 10 is also provided with a base portion which is closely fitted to the manifold portion 4. Furthermore, to apply each color with the same coating thickness,
The paint flow rate is suppressed at the same ratio as the ratio of each coating width dimension.

[0011]

As is apparent from the above description, claim 1
According to the invention, in the slot die provided with the coating liquid passage consisting of the manifold portion and the slit portion, the coating liquid passage is partitioned in the width direction, and by supplying the coating liquids of different colors to the respective partition coating liquid passages, Multiple stripes of different colors can be painted at once. Further, according to the invention of claim 2, by changing the number of seal members and partition members arranged in the coating liquid passage, the respective colors do not overlap each other,
It is possible to provide a stripe coating slot die that can easily coat multicolor stripes.

[Brief description of drawings]

FIG. 1 is a front view of a slot die for stripe coating according to the present invention.

FIG. 2 is a side view of FIG.

FIG. 3 is a plan view showing a state where a part of the upper die of FIG. 1 is removed.

FIG. 4 is a sectional view taken along line IV-IV of FIG.

[Explanation of symbols]

DESCRIPTION OF SYMBOLS 1 ... Die main body, 2 ... Upper die, 3, 8 ... Dividing surface, 4 ... Manifold part, 4a, 4b ... Groove, 5 ... Paint supply port, 7 ...
Lower die, 9 ... Slit portion, 10 ... Sealing member, 11 ...
Partitioning member, 12 ... Base portion, 13 ... Body portion, 14, 16 ... Mounting bolt, 15 ... Side plate, α ... Step, a ... Inclined surface, b ... Tip width, c ... Taper.

Claims (2)

[Claims] 1. A slot die having a coating liquid passage consisting of a manifold portion and a slit portion, wherein the coating liquid passage is divided in the width direction, and liquid coating materials having different components are supplied to the divided coating liquid passages to form a strip shape. A stripe coating method characterized in that a continuous coating surface having the same coating thickness and having no cut in the width direction of the material is simultaneously formed. 2. A slot die having a coating liquid passage consisting of a manifold portion and a slit portion, which is formed by integrating a dividable die body consisting of an upper die and a lower die and the upper die and the lower die. A detachable seal member located at both ends of the slit portion to close at least the slit portion, a base portion located between the seal members and closely fitted in the manifold portion, and a body having a tip with a predetermined width of 5 mm or less. A slot die for stripe coating, characterized in that the slot die is composed of a detachable partitioning member formed by a section.