JPS62132567A - Method for wiping edge of strip after coating resin or treating liquid - Google Patents

Abstract

PURPOSE:To efficiently dry the edges of a strip by providing a partition wall having a slit in the mid-way where the strip transfers from a squeezing stage to a drying stage and blowing air in a specific direction to the strip. CONSTITUTION:The partition wall 9 having the slit 8 through which the strip 1 passes is provided in the mid-way where the strip 1 transfers from the squeezing stage 5 to the drying stage 6. The air 11 is blown by wipers 10a, 10b to the strip 1 delivered from the slit 8 from the side facing the transfer direction thereof and inside in the transverse direction thereof toward the edge sides 1b, 1c. The air to be blown may be the hot air supplied from hot air blowers 12. Then the overcoating and defective drying of the edges of the strip are thoroughly prevented and the influence of the air on the squeezing rolls is prevented. Efficient drying is thus executed.

Description

DETAILED DESCRIPTION OF THE INVENTION Field of Industrial Application This invention relates to an edge wiping method for drying a strip material after applying a resin or a processing liquid (hereinafter referred to as "processing liquid, etc.").

2. Description of the Related Art When a treatment liquid or the like is applied to a strip-shaped steel plate, an apparatus as shown in FIG. 9 has conventionally been employed as the equipment.

In this device, a spray nozzle 10 is attached to the strip 101 while moving the strip 101 in the direction of the potato.
2, the treatment liquid etc. 103 is sprayed, and the squeezing roll 104 is
It is narrowed down by the following. Further, on the back side 101a, a processing liquid 103 is further stored in a lower pan 105 and applied by a squeezing roll 104a. And treatment liquid etc. 10
The METRY 2 paste 101 coated with No. 3 is sent to a drying oven 106 and is dried while passing through the oven 106.

Problems to be Solved by the Invention However, with the means adopted in the conventional apparatus, since the processing liquid 103 is squeezed by the squeezing roll 104, the edge portions 101b and 101c of the strip 101 are not squeezed properly, and overflow occurs. It becomes coated and becomes difficult to dry. Therefore, even after leaving the drying oven 106, the edge portions 101b and 101c may remain wet due to insufficient drying.To prevent this, it is necessary to increase the drying capacity.
Alternatively, the line speed of the strip 101 must be lowered for processing.

There are often limits to how much drying capacity can be increased, and productivity problems such as increased power consumption occur.If processing is performed at a lower line speed, product quality may be affected, such as insufficient film volume or contamination. The problem arises that the amount of energy decreases.

Therefore, the present invention was created with the aim of solving the above-mentioned technical problem by providing a means for efficiently drying the edge portion of the strip without affecting the process of applying processing liquid or the like during the drying process. Ta.

Means to solve problems The basic concept of the invention is illustrated in FIGS. 1 and 2.

The present invention relates to a means for performing a coating step 3 of a treatment liquid or the like 2, a squeezing step 5 using squeezing rolls 4a and 4b, and a drying step 6 while moving the strip 1 in the direction of the yam. In addition, application process 3 of treatment liquid etc. 2
The processing liquid etc. 2 is sprayed from spray nozzles 3a and 3b, and the lower part of the squeezing roll 4b is a pan 7.
It is immersed in the processing liquid etc. 2 in the strip L, and also has the role of applying the processing liquid etc. 2 to the lower surface 1a of the strip l.

The feature of this invention is that the strip l
A partition wall 9 having a slit 8 through which the strip l passes is provided on the way from the drawing step 5 to the drying step 6,
For the strip 1 sent out from the slit 8,
The purpose is to blow air 11 toward the edge side 1b and the IC from the inner side in the width direction with wipers 10a and 10b facing the direction of movement.

The blown air 11 can also be made into hot air by being supplied from a hot air blower 12 in order to improve drying efficiency.

By this method, as the strip 1 moves, the treatment liquid 2 is applied to the surface of the strip 1, squeezed, and dried. However, the edge sides 1b and lc are particularly susceptible to overcoat and poor drying. Efficiently dries without drying. That is, the wipers 10a, 10a face the strip l sent out from the slit 8 in its transition direction, and move from the inner side in the width direction toward the edge sides 1b, lc.
Since -c air 11 is sprayed at step 10b, even if the processing liquid 2 that could not be squeezed out in the squeezing step 5 by squeezing rolls 4a and 4b is excessively attached to the edge sides 1b and lc, it can be sprayed. The coating can be blown to an appropriate amount and dried preferentially. Therefore, it is possible to prevent the edge sides 1b and lc of the strip 1 from drying poorly or becoming overcoated.

Furthermore, when the air 11 is blown onto the strip l from the wipers 10a and 10b, the partition wall 9 can prevent the squeezing rolls 4a and 4b of the previous squeezing process 5 from drying out and from getting dust attached thereto.

The width of the slit 8 is desirably slightly wider than the thickness of the strip 1, and must not be so wide that the air 11 passes through the slit 8 and shines directly onto the squeezing rolls 4a, 4b.

This makes it possible to avoid damaging the coating formed on the surface of the strip 1 by the treatment liquid etc. 2 and preventing dust from being mixed in the coating.

Note that if the air 11 is hot air, the drying speed can be increased, and the line speed of the strip 1 can be increased to improve productivity.

Embodiments Regarding the method of the present invention, the following various embodiments can be specifically devised, and each of them can exhibit its technical effects.

Embodiment F.1 is shown in FIG. 3, and is designed to control the amount of air supplied.

A slit 14 is provided in the partition wall 15 through which the strip 13 passes during the transition from the drawing process to the drying process. wiper 16 toward the edge sides 13a, 13b.
The basic structure of the means for blowing the air 17 at the wipers 16a and 16b is the same as that described above, but dampers 18a and 18b are added to the supply path of the air 17 to the wipers 16a and 16b.
A line speed detector 20 detects the transition speed of the strip 13 from the rotational speed and number of windings of the take-up roll 19, and controls the opening degrees of the dampers 18a and 18b based on the speed detection data. Accordingly, the amount of air 17 blown is controlled in accordance with the line speed.

As a result, when the line speed changes, the opening command is sent from the line speed detector 20 to the dampers 18a and 18b.
The temperature, pressure, etc. of the air 17 are automatically controlled by changing the opening degrees of the dampers 18a and 18b. In other words, if the optimum conditions for blowing the air 17 are determined according to the conditions such as the sheet thickness and steel type of the Metry 2p 13, the air that is most suitable for edge overcoat prevention and drying will be applied in response to subsequent changes in line speed. 17
will be sprayed onto the strip 13.

Particularly, even if the rotation of the take-up roll 13 is constant, as the number of windings increases, the line speed gradually increases, so it is often necessary to perform such control.

The second embodiment, as shown in FIG. 4, is provided with means for controlling the wiper position in response to changes in the width of the strip.

This embodiment is similar to the above in that a partition wall is provided between the coating process of the treatment liquid etc. and the drying process, but
The positions of the wipers 21a and 2Lb are movable in the width direction of the strip 22. That is, the wipers 21a and 21b are moved in the cylinder 23 in the board width direction in accordance with the board width.
If the wiper 21a is made movable by the wipers 21a and 23b, the wiper 21a can be moved immediately even when the width of the plate changes.

21b can be moved to ensure an optimal position, and the amount of air 24 blown can be controlled depending on the dryness of the edge portions 22a, 22b. In addition, the wipers 21a, 2
The movement of 1b can also be performed by a motor, gears, etc.

Various shapes and structures can be considered for the above wiper, but for example, as shown in Figure F55, a slit hole 26 is bored in a hollow cylindrical portion 25 with both ends sealed, and air is supplied to one end. It is conceivable that a pipe 27 is attached.

Further, it is effective to make the wiper strips face each other at an angle of inclination of 20° to 80° with respect to the direction of movement of the wiper strips.

The third embodiment is as shown in FIG. 6, in which the width of the slit in the partition wall is controlled. That is, the partition wall is composed of an upper partition wall 28a and a lower partition wall 28b, and a slit 30 through which the strip 29 passes is formed between the opposing side end surfaces.
b can be moved in a direction perpendicular to the strip 29 using cylinders 31a and 31b, and the width of the slit 30 can be changed according to the thickness of the strip 29. A strip 29 in which the processing liquid, etc. 33 has been squeezed by squeezing rolls 32a and 32b and sent out.
passes through the slit 30, and its edge is the wiper 34.
The air 35 is blown from the slits 30 and 34b, but this air 35 passes through the slits 30 and dries the squeezing rolls 32a and 32b. By controlling the width of the strip 30 in accordance with the thickness of the strip 29 and reducing the flow gap between the coating process and the drying process, deterioration of product quality due to the adverse effects associated with the above-mentioned air circulation is prevented. It is.

The fourth embodiment is shown in FIG. 7, and is designed to prevent the adverse effects of air as in the third embodiment.

That is, exhaust ducts 38a and 38b are provided between the partition wall 36 and wipers 37a and 37b to exhaust air 39. This allows air 3 to be blown to dry the edges of the strip 40.
9 will be immediately exhausted from the exhaust ducts 38a and 38b, so the air 39 will flow through the slit 4 of the partition wall 36.
1 and flowing into the squeezing roll side 42, and adverse effects such as drying of the squeezing roll can be suppressed.

FIG. 8 shows an apparatus for implementing the present invention, which is a combination of the above-mentioned embodiments.

This implementation device implements the basic concept of the invention and incorporates the embodiments described above.

The strip 43 is coated with a treatment liquid and dried while passing through the cover 44. First, the strip 43 fed into the cover 44 is passed through the spray nozzle 45a.
, 45b, and the processing liquid 46 is squeezed by the upper and lower squeezing rolls 47a, 47b. At the same time, the lower side 43a of the strip 43 is applied by the lower roll 47
By b, the treatment liquid 46 is appropriately applied.

The strip 43 coated with the treatment liquid 46 and squeezed in this way is transferred to a drying process, but upper and lower partition walls 48a and 48b are provided between the squeezing process and the drying process.
A slit 49 is formed between the opposing sides of each of the partition walls 48a, 48b, and the strip 43 is sent out to the drying process through the slit 49. By the way, interval fi4
8a and 48b are movable in a direction perpendicular to the strip 43 by cylinders 50a and 50b, so that the width of the slit 49 can be controlled according to the thickness of the strip 43.

Exhaust ducts 51a and 51b are provided at the portion where the strip 43 is sent out from the slit 49, and the air 53 blown onto the strip 43 from wipers 52a and 52b is later blown by exhaust blowers 54a and 54b.
is ejected to the outside of the cover 44.

Wipers 52a, 52b are pipes connected to dampers 55a, 5.
The dampers 55a, 55b are connected to the line speed detector 57 via the hot air blowers 56a, 56b.
The wiper 52a is controlled by the opening command issued from the wiper 52a.
, 52b, the temperature and amount of air 53 coming out from the air 53 are adjusted.

Further, the wipers 52a and 52b can be controlled to move in the width direction according to the width of the strip 43 by cylinders 58a and 58b provided outside the strip 43 in the width direction.

Therefore, when the strip 43 coated with the treatment liquid 46 is sent to the drying process, the air 53 is transferred to the squeezing roll 47.
cylinder 50 to prevent it from flowing to the a and 47b sides.
The horizontal position of the wipers 52a and 52b is adjusted so that the width of the slit 49 is adjusted appropriately according to the thickness of the strip 43 in a and 50b, and the air 53 is appropriately blown to both edges according to the width of the strip 43. is the cylinder 58a
, 58b are adjusted by □, and the wipers 52a, 52
The amount of air 53 blown from b is determined by the damper 5 based on the opening command from the line speed detector 57.
5a and 55b are controlled to select appropriate values.

Further, from the exhaust ducts 51a and 51b, the blown air 53 is supplied to the edge portion of the strip 43 and then passed to the squeezing roll 47a.

Exhaust blowers 54a and 54 are installed so as not to flow into the
The air 53 is immediately exhausted by the forced suction of b.
Coupled with controlling the width of the slit 49, the blowing of the air 53 can be applied to the process of applying and squeezing the processing liquid 46! This prevents the effects of

By implementing the above means, this apparatus can carry out the method of the present invention under optimal conditions, and can completely perform edge wiping and drying after applying the treatment liquid 46 to the strip 43 without overcoating or defective drying. I can do it.

Effects of the Invention The present invention uses a wiper that blows air against the strip in the transition direction and from the inside in the width direction toward the edge side, so that the edge of the strip is not overcoated or dried. Defects can be completely prevented. As a result, problems such as deterioration in quality such as lack of skin fiffi and dirt, and deterioration in productivity, which were caused by lowering the line speed, are resolved.

This -2 effect can be brought out by supplying hot air.

In addition, by providing a partition wall with a slit through which the strip passes during the transition from the drawing process to the drying process, we were able to prevent air from forming on the drawing roll, thereby preventing deterioration in product quality. can.

Furthermore, the width of the slit in the partition wall and the air blowing conditions can be automatically controlled according to the width and thickness of the strip, so there is no need for an operator to constantly monitor the vicinity of the strip. This will allow you to work very safely.

[Brief explanation of drawings]

Fig. 1 is a front view showing the basic concept of the present invention, Fig. 2 is an open plan view, Fig. 3 is a front view showing the basic concept of an embodiment of the invention, and Fig. 4 is an embodiment of the invention. Figure 5 shows the basic concept of the wiper installation stirrup from the direction of strip transition.
The figure is a perspective view showing an example of a wiper, and FIGS. 6, 7, and 8 are front views showing the basic concept of an embodiment of the present invention.
Figure 9 is a front view showing the basic concept of the prior art;
The figure is a plan view of the strip. l...Street 7 strip la...Bottom side of strip 2...Treatment liquid, etc. 3...Coating process 3a, 3b...
・Spray nozzle 4a, 4b... Squeezing roll 5・
・・Squeezing process 7・Bread 8・Slit 9・
...Partition wall 10a, fob...Wiper 11...Air 12...Hot air blower 13...Strip
14...Slit 15...Separation fi 16a, 1
6b-Wiper 17... Air 18a, 18b.
...Damper 19...Take-up roll 20...Line speed detector 21a, 21b...Wiper
22...Strip 23a, 23b...Cylinder 24...Air 25...Hollow cylindrical portion 26...Slit hole 27...Air supply pipe 28a...Upper partition 28b...Lower partition 29 ...Strip 3
0...Slit 31a, 31b...Cylinder 3
2a, 32b... Squeezing roll 33... Processing liquid, etc.
34a, 34b...Wiper 35...Air 3
6...Partition walls 37a, 37b--wiper 3
8a, 38b...Exhaust duct 39...Air
40...Strip 41...Slit 42...
- Squeezing roll side 43...Strip 44...Cover 45a. 45b...Spray nozzle 46...Treatment liquid, etc. 4
7a, 47b... Squeezing roll 48a... Upper partition wall 48b... Lower partition wall 49... Slip 7) 50a
. 50b...Cylinder 51a, 51b...Exhaust duct) 52a, 52b...Spray nozzle 53.
...Air 54a, 54b...Exhaust proa 55a
, 55 b--damper 56 a , 56
b - = Hot air blower 57... Line speed detector 58a, 58b... Cylinder 1... Strip 1a... Bottom surface of strip 2... Processing liquid, etc. 3... Coating process 3a, 3b
... Spray nozzles 4a, 4b... Squeezing roll

Claims (6)

[Claims] (1) In a method of applying and drying a resin or treatment liquid to a strip, in which the strip is moved in the longitudinal direction and subjected to a process of applying a resin or a treatment liquid, a squeezing process using a squeeze roll, and a drying process along the path, the strip is A partition wall having a slit through which the strip passes during the transition from the drawing process to the drying process is provided, and a wiper is provided facing the strip fed out from the slit in the transition direction and from the inside in the width direction toward the edge side. An edge wiping method after applying a resin or treatment liquid to a strip, characterized by blowing air with it. (2) Claim No. 2 in which the air is hot air (
Edge wiping method after applying resin or treatment liquid to the strip described in section 1). (3) A damper is provided in the air supply path to the wiper, the transition speed of the strip is detected, and the opening degree of the damper is controlled based on the detected speed data. A method of wiping an edge after applying a resin or a treatment liquid to a strip according to item (2) or item (2). (4) An edge wiping method after applying a resin or a treatment liquid to a strip according to claim (1) or (2), wherein the position of the wiper is moved in the width direction according to the width of the strip. (5) The slit width of the partition wall can be changed according to the thickness of the strip.
Edge wiping method after applying resin or treatment liquid to the strip described in section 2). (6) A method for edge wiping a strip after applying a resin or a treatment liquid as set forth in claim (1) or (2), wherein air is exhausted from between the partition wall and the wiper.