JPS5931382B2 - Vibrating blade coater - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention is suitable for continuously running strips such as paper, film, etc.
The present invention relates to a vibrating blade coater that can arbitrarily control the amount of coating liquid applied to metal foil and composite materials thereof.

Conventionally, a typical apparatus for uniformly and highly precisely coating a continuous strip with resin is often a gravure roll coating system. This gravure roll coating is a method in which the T liquid is sucked up onto an etched gravure roll, the excess coating liquid on the surface is scraped off with a doctor, and a certain amount of the coating liquid is coated on the film surface. FIG. 1 is a schematic explanatory diagram showing an example of a conventional gravure coating device of this type, and in the figure, 1 is a gravure roll having numerous depressions 1' on its surface, and 2 is an emulsion type coating liquid. Or coating liquid such as laminating adhesive, 3 is a liquid tank, 4
is a doctor blade, and the tip of this doctor blade 4 is provided so as to come into pressure contact with the surface of the gravure roll 1. 5 is a backup roll, and 6 is a coated strip of paper, film, metal foil, or a composite material thereof.

The lower part of the gravure roll 1 is immersed in the coating liquid 2, and the excess coating liquid on the surface is scraped off by a doctor blade 4 above the liquid level in the rotation direction (in the direction of the arrow in the figure). , coating liquid 2 that has entered the recess 1' of the gravure roll 1
is transferred to the strip 6 by the rotation, and the coating film 2'
form. Incidentally, the amount of coating liquid 2 applied to the strip 6 is determined by the size of the depression 1' carved on the gravure roll 1 and the concentration of the coating liquid 2, and a constant coating amount is always maintained. be able to. However, according to the above-mentioned conventional device, when used for a long time, the outer circumferential surface of the gravure roll 1 and the doctor blade 4 are worn out due to the pressure contact force of the doctor blade 4, and the recess 1' becomes shallow.
In that case, it was necessary to replace the gravure roll 1. In addition, gravure roll coating has a very high coating accuracy using a metering system using a metering cell with a concave 1'. For roll 1, the coating amount must be adjusted only by controlling the concentration of coating liquid 2. Therefore, the adjustment range of coating amount is very narrow, and in practical use, multiple gravure rolls 1 with different cell sizes are required.
required. Moreover, this gravure roll 1 is very expensive because it is engraved, and it is uneconomical and expensive to prepare a large number of rolls or to frequently replace them due to wear.
When adjusting the coating amount, the gravure roll 1 has to be replaced each time, which is inconvenient and inconvenient. In view of the above-mentioned drawbacks, the present invention aims to provide an alternative gravure roll coating device using a vibrating blade while taking advantage of the features of gravure roll coating.

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS The structure of the present invention will be described below with reference to embodiments shown in the drawings.

2 to 4, 11 is a coating roll with a smooth surface that is rotatably supported by an appropriate means, 12 is a backup roll, 13 is a guide roll, and 14 is an emulsion type coating liquid or laminate. 15 is a liquid tank; 16 is a strip of paper, film, metal foil, or a composite material of these; the lower part of the coating roll 11 is the coating liquid in the liquid tank 15; Coating liquid 14 immersed in liquid 14 and attached to the surface of coating roll 11
After forming a sawtooth wave-shaped coating film 14aK using a vibrating blade 17 (to be described later), the coating film 14aK is transferred to a movable strip 16 to form a coating film 14b.

Reference numeral 18 denotes a vibration generator for applying vibration to the vibrating blade 17, and this device 18 is arranged along the side of the coating roll 11.

That is, in the same apparatus 18, 19 is the coating roll 11.
A pair of guide members 22, 22 having guide grooves 21 on opposing surfaces are fixed at symmetrical positions on both sides of the base plate 20, as shown in FIG. 2
3 is a split shaft holder whose base 23' is slidably fitted into the guide groove 21 and supported upright by guide members 22, 22 at both ends of the base plate 20; 24 is a prismatic cross shaft; This has a flat mounting portion 24a formed by cutting out the upper surface in the width direction, and both shaft ends 24b are formed in a cylindrical shape.

Then, by rotatably penetrating the shaft ends 24b of the cross shaft 24 into the divided shaft holders 23 on both sides, the cross shaft 24 can be pivotally supported on the pedestals 23, and the cross shaft 24 can be screwed into the pedestals 23. Tighten and secure with bolts 25. 26 is a fixing bolt screwed into a predetermined position of the split shaft holder attachment part of the base plate 20 from the back side, and the bolt 26 is tightened to press its tip surface to the split shaft holder 23, thereby The pedestal 23 is positioned and fixed at a predetermined position.

Reference numeral 27 denotes a bracket fixed to a predetermined portion of the base plate 20 of the support frame 19 in correspondence with the split shaft holder 23;
is an adjustment bolt inserted through this bracket 27 and screwed through a predetermined portion of the split shaft holder 23;
A clearance adjustment handle 29 is attached and fixed to its outer end, and by rotating this adjustment handle 29 in any predetermined direction, the split shaft holder 23 can be moved in the front-rear direction (in the direction of the arrow shown in the figure) along the guide members 22, 22. ).

Reference numerals 30 and 30 denote vibration absorbing plates of a predetermined width which are superimposed and fixed on the rear edge portion with a member 31 interposed therebetween. The front edge portion is made to protrude forward, that is, toward the coating roll 11 side in a tongue shape.

33 is a bolt 34 and a nut 35 interposed between the tongue-shaped front end edges of the vibration absorbing plates 30, 30.
, 30 and protrudes forward, and a gap 36 is formed between the diaphragm 33 and the member 31.

Reference numeral 37 denotes a blade holding plate having approximately the same width as the coating roll 11, and this blade holding plate 37 is attached with bolts 38 so as to abut against a flat notch formed in the width direction on the lower surface of the protruding portion of the diaphragm 33. As a result, the vibrating blade 17 made of steel or plastic is sandwiched between the vibrating plate 33 and the blade holding plate 37 so as to be replaceable.
The front edge of the coating roll 7 is projected forward and brought into light line or surface contact with the smooth outer circumferential surface 11' of the coating roll 11.

A vibration generator 39 is fixed at a predetermined position on the upper surface of the diaphragm 33 and whose frequency and width can be freely adjusted. Compressed air may be used as the generation source, or an electric type may be used as the generation source. Good too.

When the vibration generator 39 is activated, the vibration plate 33 sandwiched between the tongue-shaped vibration absorption plates 30 vibrates, which causes the vibration blade 17 to vibrate and cause the outer peripheral surface of the coating roll 11 to vibrate. The coating liquid 14 with a voltage of 1V is formed into a sawtooth wave-shaped coating film 14a.
The shape of the waveform coating film 14a, that is, the wavelength 1, the depth h, and the coating amount can be finely adjusted by appropriately controlling the frequency and vibration width of the vibration generator 39. Accordingly, an arbitrary corrugated coating film 14a can be formed depending on the type of continuous strip 16. 40
is the support frame 1 at a position below the vibrating blade 17.
A fixed blade is attached and fixed approximately horizontally to the side surface of the coating roll 9 through a bracket 41, and its tip edge is brought into line contact with the outer peripheral surface of the coating roll 11 to preliminarily scrape off excess coating liquid. play a role.

When coating the coating solution 14 on the strip 16, the frequency and vibration width of the vibration generator 39 are adjusted in advance to create a corrugated coating film suitable for the strip 16 to be coated. The vibration of the vibrating blade 17 is regulated so that 14 is formed.

Then, the coating roll and back-up roll 12 are rotationally driven by appropriate means to cause the strip 16 to run continuously, and at the same time, the vibration generator 39 is activated to vibrate it. Then, this vibration is transmitted to the vibrating blade 17 via the vibrating plate 33 and the blade holding plate 37 screwed onto the vibrating plate 33.
It is transmitted to At this time, the diaphragm 33 is connected to the cross shaft 2.
Since one end is fixed to the diaphragm 4 and held between the tongue-like vibration absorbing plates 30, 30, the vibration transmitted to the diaphragm 33 will not be transmitted to the support frame 19 side. Then, as the coating roll 11 rotates, the coating liquid 14 that adheres to the smooth outer circumferential surface 11' is scraped off by the fixed blade 40 as the coating roll 11 rotates, and then vibrated. The position of the blade 17 is reached. Then, this vibrating blade 17 touches the outer surface 1111C of the coating roll 11 as described above.
Because it is in line contact or surface contact and vibrates,
The coating liquid 14 adhering to the coating roll 11 is formed by the vibrating blade 17 into a sawtooth-shaped wavy coating film 14a consisting of minute irregularities with a constant wavelength l and depth h. The formed wavy coating film 14a is further transferred onto the strip 16 as the coating roll 11 rotates, forming a coating film 14b. Repeat the same operation below. Incidentally, if it is desired to adjust the positional relationship of the vibrating blade 17 with respect to the coating roll 11 in order to obtain the desired coating amount and shape of the corrugated coating film 14b, the following procedure is performed.

That is, when adjusting the contact angle of the vibrating blade 17, loosen the bolt 25, rotate the cross shaft 24 by a predetermined angle, and then tighten the bolt 25 again.
7 may be held at a predetermined inclined position. If the clearance between the vibrating blade 17 and the coating roll 11 is adjusted properly, loosen the fixing bolt 26, then tighten the adjustment handle 2.
9 in a predetermined direction, thereby screwing together with the adjustment bolt 28 and moving the split shaft holder 23 to the guide members 22, 22.
After that, the fixing bolt 26 is tightened again to position and fix the pedestal 23 in a predetermined position. FIG. 5 shows another embodiment of the present invention, in which the same parts as in the previous embodiment are designated by the same reference numerals.

That is, in this embodiment, an offset roll 42 is arranged between the coating roll 11 and the backup roll 12. In this case, the vibrating blade 17 is placed at a position opposite to that of the previous embodiment. Having explained the above to my friend, the present invention involves immersing the lower part of the coating roll that rotates in contact with the pack-up roll into the coating solution in a liquid tank, and then removing the coating solution that has adhered to the surface of the coating roll. For scraping, a vibrating blade equipped with a vibration generator that can freely control the frequency and width of vibration is placed on the surface of the coating roll on the upper side of the rotational direction than the contact area with the back-up roll. The coating liquid on the coating roll with a smooth surface is formed into a sawtooth-shaped wavy coating film and coated onto a running continuous strip. It is not necessary to use a roll with a smooth surface, and moreover, it is possible to perform gravure coating equivalent to conventional gravure coating with this roll with a smooth surface, and it is possible to significantly reduce costs.

Friend, it is possible to adjust the amount of coating liquid applied to the strip simply by adjusting the frequency and amplitude of the vibration of the vibrating blade, and at the same time, the adjustment is extremely simple and easy. The adjustment range is much wider than that of conventional gravure rolls, and the coating amount can be adjusted according to the rotation speed of the coating roll. Furthermore, since the vibrating blade does not need to be brought into pressure contact with the coating roll, there is almost no wear on it, improving durability, and there is no need to replace the coating roll as frequently as in the past.
Workability can be improved accordingly.

[Brief explanation of the drawing]

Figure 1 is an explanatory diagram of a conventional gravure roll coater, Figure 2
The figure is a schematic explanatory diagram of a vibrating blade coater according to the present invention,
FIG. 3 is a partially omitted side explanatory view of the present invention showing FIG. 2 in more detail, FIG. 4 is a partially enlarged rear view of FIG. 3, and FIG. 5 shows another embodiment of the present invention. FIG. 11... Coating roll, 12... Backup roll, 14... Coating liquid, 14...
... Wave-shaped coating film, 16 ... Band-shaped object, 17 ...
... Vibration blade, 39 ... Vibration generator, 2
4...Cross shaft, 30, 30...
・Vibration absorption plate, 33... Vibration plate, 37...
...Blade holding plate.

Claims (1)

[Claims] 1. Dipping the lower part of the coating roll rotating in contact with the backup roll into the coating liquid in a liquid tank, and scraping off the coating liquid adhering to the surface of the coating roll with a doctor. , a vibrating blade equipped with a vibration generator that can freely control the frequency and width of vibration is placed on the surface of the coating roll at an upper side in the direction of rotation than the contact part with the backup roll, and is placed in contact with it to smooth the surface. A vibrating blade coater is characterized in that a coating liquid on a coating roll is formed into a saw-toothed wave-shaped coating film, and the coating film is applied to a continuous strip-shaped object that is traveling. 2. The vibrating blade is replaceably held by a vibrating plate and a blade holding plate, and is firmly supported by a strong cross shaft via a vibration absorbing plate, and the clearance and contact angle between the coating roll surface and the vibrating blade tip are controlled. A vibrating blade coater according to claim 1, which is freely adjustable.