JPH0570672U - Coating test equipment - Google Patents

Abstract

(57) [Summary] [Purpose] To provide a coating test device that enables rapid preparation of an appropriate coating sample that reproduces the coating state on an actual line. [Configuration] Multiple coating rolls (pickup roll 21,
It is equipped with an applicator roll 22, a backup roll 23, etc.), and the strip sample 50 is wound around the backup roll 23 that moves to both the contact and separation positions with respect to the applicator roll 22 (backup roll). -About one roll of strip sample is wound around the roll, but the backup roll moves to the retracted position when the strip sample is tightly wound / removed.) , Dry on the backup roll 23
A cover 43 having an inlet 48 and an outlet 49 for the cooling air and having a part of the outer circumference thereof openable and closable is covered, or the backup roll moving cylinder 32 is "pressed". The pulling pressure "shall be set individually.

Description

[Detailed description of the device]

[0001]

[Industrial application]

 The present invention relates to a "coating test device" for simulating a "continuous coating machine for continuously coating paint on a metal strip (hereinafter referred to as" strip ") surface using a coating roll". It is a thing.

[0002]

[Prior art and its problems]

 A continuous coil coating line is generally used for coating strips of continuously rolled steel, aluminum, etc., but this strip coating line is a very long facility. For example, the one shown in Fig. 16 is an example of a strip continuous coating line, which consists of an inlet side section, a central section, and an outlet side section. In the inlet side section, a coiled strip is used as a payoff reel. , 2 is arranged so as to continuously feed the strips without interruption, whereby the strips to be processed are connected one after another. Further, the central section is composed of a chemical conversion treatment unit 6 for imparting paint adhesion to the strip 6, paint coaters 7 and 9, ovens 8 and 10, a skin pass mill 11, and a tension leveler 12. Then, in the exit section, it is inspected for defects, sampling and cutting the strip into a predetermined size and then winding the strip again. In FIG. 10, reference numeral 3 is an inlet side shear, 5 is an inlet side accumulator, 13 is an outlet side accumulator, 14 is an outlet side shear, and 15 is a tension reel. .. A roll coater is usually used to apply the coating material on such a strip continuous coating line.

By the way, recently, in order to cope with various diversified demands, new products using new coating materials as coating products have come to appear on the market one after another. When such a new coated product is to be manufactured by a continuous coil coating line, it is necessary to first perform a "trial coating" to determine the coating conditions that the new coating material can tolerate. is there. However, this “trial coating” often depends on the experience and intuition of the past, so it was necessary to perform trial coating multiple times before actual operation.

However, in the case of trial coating in a long coil strip continuous coating line as described above, a large amount of test material is required to cover the entire line, and all defective products generated at this time are required. Because of the material loss, the cost and time required for trial coating was enormous. Therefore, reducing the number of trial coatings on the actual line is a major issue in reducing the manufacturing cost of coated products.

On the other hand, when trying to develop a new coating material, it would take too much time if the success or failure was judged by a coating test using an actual continuous coating line. It was also pointed out that it would hinder research.

Therefore, the inventor first applies the paint in the paint pan to the strip by "a plurality of coating rolls (pickup roll, applicator roll, backup roll, etc.)". In the roll coater, the backup roll is equipped with a device for tightly winding and attaching / detaching the strip sample, so that the backup roll that rotates steadily can wind and remove the strip sample of about one roll. At the same time, a backup roll retracting mechanism that retracts the backup roll from the applicator roll, a locking mechanism that locks the backup roll in the retracted position, and a locking release mechanism that releases the locking. , Equipped with a heater for drying the coating film applied to the strip surface and a coating film cooling device (coating film cooling nozzle, etc.). It is possible to coat the strip sample in the same way as the backup roll for one rotation or less in the same condition as the operation in the actual line. At the same time, perform the coating and then retract the backup roll. By allowing the coating film to be dried and cooled as it is, we have proposed a coating test device that enables the rapid preparation of appropriate coating samples without the need for undue handling (Practical application No. 3-36248).

That is, according to this apparatus, a strip sample of about one roll is wound around the backup roll, and this small sample is coated in the steady rotation state of the actual operation, thus It is possible to obtain a coated sample in the same state as it was coated on the strip continuous coating line of the above, and since the coated strip sample can be dried and cooled under the same conditions as the actual line without removing it from the backup roll. It is no longer necessary to handle wet painted samples, and troubles such as unnecessary scratches on the samples and loss of time due to handling are avoided, making it easier to create painted samples. Therefore, the number of trial coatings using the actual continuous coating line was reduced, and it became possible to accurately grasp the required coating conditions with the minimum test material usage and test time.

However, the demand for improvement in productivity of coating materials and the like never stops, and further shortening of the coating test time has been expected.

[0009]

[Means for Solving the Problems]

 From the above viewpoints, the present inventor further examined factors relating to the roll coater test apparatus as proposed above, which lead to shortening the test time, and confirmed the following facts. Was done. a) There is room for improvement in the drying / cooling ability after applying the paint to the strip sample, and the improvement is very effective in shortening the test time. In order to improve the drying / cooling ability, it is effective to cover the backup roll with a cover at the time of drying / cooling after coating the coating and blow the drying / cooling air into the cover. Target.

B) Further, when the strip sample is tightly wound around and attached to and detached from the backup roll, the back-up roll is moved by an air cylinder, and this air cylinder is equivalent to the weight of the back-up roll. With the structure that also bears, when operating with the same air pressure for "push pressure" and "pull pressure", the velocity of the piston changes due to the effect of gravity during descent and ascent, and there is a delay in movement during ascent. Occurs. However, if the air supply method to the backup roll transfer air cylinder is improved so that the pressure of the backup roll transfer cylinder is set individually for "pushing pressure" and "pulling pressure", the backup application will be performed. -The above problem due to the influence of the weight of the cable is solved, and the test can be performed at any set pressure during the descent and the ascent, which contributes to the reduction of the test time.

The present invention has been completed on the basis of the above-mentioned findings and the like. "A strip sample is wound around a backup roll that moves to both contact and separation positions with respect to an applicator roll, In a coating test apparatus such as the one proposed earlier (actual application No. 3-36248), when this is steadily rotated for test coating, drying / cooling air is introduced into the backup roll. Cylinder for moving a backup roll that has a port and a discharge port and covers a part of its outer periphery that can be opened or closed, or that sets the pressure individually for "pushing pressure" and "pulling pressure" By providing-, it is possible to carry out the coating test more quickly and smoothly. "

Here, the conditions such as the coating roll diameter and length, the roll material, the rotating direction, and the rotating speed of the coating tester according to the present invention are the target roll coater to be simulated. Needless to say, it should be set similarly to.

A strip sample attachment / detachment device is attached to the backup roll of the coating tester according to the present invention. The strip used for the coating test has a length of one roll or less on the back-up roll. It is removably wound around and fixed to the backup roll with a predetermined tension (the same tension as in actual operation).

The movement (retraction) of the backup roll with respect to the applicator roll is necessary for mounting / removing the strip sample and for drying / cooling the coating film. It is preferable that the roll position is also movable and only the position of the applicator roll is immovable. The backup roll forced retreat mechanism comprises, for example, a cam disc and a cam follower, and the cam discs are mounted coaxially with the backup roll on both sides of the backup roll. The mounting position of the cam follower is immovable, and the position of the convex part of the cam follower should be aligned with the strip mounting part of the backup roll.

The locking device for stopping the moving backup roll at a predetermined position and the locking releasing mechanism for releasing the locking device may be composed of, for example, a share and a stopper. In this case, the share is a backup roll. It is mounted on the moving device in the pin position with a pin.

By the way, when the backup roll forced retreating mechanism is composed of a cam disk and a cam follower, and the backup roll locking device and the locking releasing mechanism are composed of a share and a stopper, Make sure that the backup roll forced retraction mechanism and the backup roll locking device meet the following positional relationship requirements. (a) When the convex part of the cam disc rides on the cam follower, the backup roll is forcibly retracted and the contact with the applicator roll is cut off. (b) In the state of (a) above, the shear and the stopper are in a locking relationship. (c) At timings other than the above (a), the backup roll is pressed against the applicator roll by the backup roll position moving device while the lock release mechanism is operating.

Further, regarding the cover of the backup roll according to the present invention, since the backup roll is movable, the cover can also be moved together with the backup roll. Since it is necessary to make contact with the applicator roll, the contact position portion of the cover must be opened and closed arbitrarily. Furthermore, when the backup roll is at the drying / cooling position of the strip sample, consider the positions of the backup roll cover and the drying / cooling air supply device so that the air supply port and the outlet of the drying / cooling air supply device are aligned. Is also necessary.

The operation of the backup roll moving air cylinder is carried out by a method in which air is supplied to the upper and lower air supply ports of the cylinder from individual four-way solenoid valves via individual pressure regulators on the upper and lower sides. Is good. As a result, it is possible to prevent the phenomenon in which the piston speed changes due to the gravity of the backup roll when it descends and when it ascends, and there is a delay in movement during ascent.

Of course, in order to sequentially operate the coating tester according to the present invention for the purpose, a control circuit composed of electric parts is applied. By using the coating tester configured as described above, the number of trial coatings in the continuous coating line can be reduced, and in developing a new coating material, the test cost can be reduced. The work period can be shortened.

Next, the coating test apparatus according to the present invention will be described more concretely with its operation based on an embodiment.

【Example】

 1 to 15 are explanatory views relating to one example of the coating test apparatus of the present invention, FIG. 1 is a front explanatory view of the coating test apparatus, and FIG. 2 is an AA direction explanatory view in FIG. Is.

In the figure, reference numerals 21, 22 and 23 are a pickup roll, an applicator roll and a backup roll, respectively, and the rotations of the variable speed motors 24, 25 and 26 are universal joints. Each roll is driven by 27, 27, 27. In this device, the mounting position of the applicator roll 22 is immovable.

The moving devices for the positionally movable pickup roll 21 and backup roll 23 are composed of moving frames 28 and 29 and a linear guide 30, respectively. The pickup roll 21 and the backup roll 23 are supported by moving frames 28 and 29 via bearings, respectively, and linearly slide on the linear guide 30 by air cylinders 31 and 32. The pressing pressure of the pickup roll 21 and the applicator roll 22 and the pressing pressure of the backup roll 23 and the applicator roll 22 during coating are set by the pressure of the air cylinders 31 and 32, respectively.

The forced retraction mechanism of the backup roll 23 is composed of a cam disk 33 having a convex portion 33 ′ on a part of its circumference and a cam follower 34. The cam disks 33 are coaxially mounted on both sides of the backup roll 23. The mounting position of the cam follower-34 is immovable. The proximity switch 35 is mounted on the cam follower holder 36 and is set so that the convex portion 33 'of the cam disc 33 senses it when the cam follower 34 rides on the cam follower 34.

A mechanism for locking the backup roll 23 at the retracted position when the backup roller 23 is retracted includes a shear 37 and a shear stopper 38, and an unlocking mechanism is an air cylinder 39. Reference numeral 40 is a proximity switch of the type that senses metal, and senses the position of the piston inside the air cylinder 32. The proximity switch 40 is turned on within the range from the position where the backup roll 23 is locked by the stopper 38 to the contact between the backup roll 23 and the applicator roll 22. Is set.

Since the apparatus of this embodiment has a vertical roll arrangement, another set of locking devices for holding the backup roll 23 at the upper limit position is provided. That is the stopper 41 and the air cylinder 42. That is, when the backup roll 23 reaches the upper limit position, the shear 37 is locked by the stopper 41, and this locking is released by the air cylinder 42.

By the way, FIG. 3 is a cross-sectional view of the backup roll 23 and the backup roll cover 43, FIG. 4 is a cross-sectional view taken along the line BB of FIG. 3, and FIG. 5 is a backup roll cover 43. 5 is an enlarged view of a C portion of FIG. 4 for explaining the details of FIG.

The backup roll cover 43 comprises disks 44 and 45 and curved covers 46 and 47 sandwiched between them. The discs 44 and 45 are coaxially received by the backup roll 23 and are rotatable, and the curved covers 46 and 47 are screwed to the discs 44 and 45, respectively. Further, the curved cover 46 is provided with an inlet 48 and an outlet 49 for dry / cooling air.

The curved covers 46 and 47 form a part of a circumference coaxial with the central axis O of the backup roll 23, and the curved cover 46 covers the E-F-G shown in FIG. The curved cover 47 covers G-HE. Here, the relationship of the distances R ₁ and R ₂ between the inner circumference of the curved cover 46 and the outer circumference of the curved cover 47 and the center of the backup roll is R ₁ > R ₂ , and the curved cover 47 is curved. Since the curved cover 47 can be freely rotated with respect to the curved cover 46, a part of the cover can be opened / closed at the time of attaching / detaching the strip sample 50 described later and painting.

Further, the backup roll 23 in the apparatus of this embodiment is equipped with the following strip sample attaching / detaching mechanism. That is, FIG. 6 is a cross-sectional explanatory view of the main part of the backup roll 23, and FIG. 7 is a sectional view taken along the line DD of FIG. A strip sample attaching / detaching device composed of the up clamps 51, 52, the strip pressing bolt 53, and the tension bolt 54 is attached.

In the coating test, the strip sample 50 is wound around the outer circumference of the backup roll 23, and its end portion is sandwiched by strip clamps 51 and 52 as shown in FIG. 6, and a strip holding bolt 53 (see FIG. 7). Tighten with. Then, by tightening the tension bolt 54, the strip sample 50 can be given a predetermined tension and tightly wound. Then, when removing the strip sample 50 from the backup roll 23, the reverse procedure may be followed.

Incidentally, FIG. 15 shows an example of a control circuit relating to the coating test apparatus. In the case of a structure in which the air cylinder 32 also bears the weight of the backup roll when the backup roll 23 is moved, if the pressing pressure required for lowering is set and operation is performed at the same operating air pressure above and below, it will be affected by gravity. The speed of the piston may be too slow or unable to ascend when rising. Furthermore, the test condition cannot be a pressing pressure less than the weight of the backup roll 23 and the backup roll cover 43. In the apparatus of this embodiment described above, the influence of gravity is large due to the vertical roll arrangement. Therefore, in this control circuit, a special devise is made in the method of introducing the working gas.

That is, as shown in FIG. 15, the air is supplied to the upper and lower air supply ports of the air cylinder 32 via the individual upper and lower pressure regulators 55 and 56 and the individual four-way solenoid valves 57 and 58. Start from. As a result, it is possible to perform a test under the condition of an arbitrarily set pressing pressure when descending and at an optimum moving speed when ascending.

Now, the coating test process using the coating test apparatus will be described step by step with reference to FIGS. 8 to 14. (1) Preparation In the test, first, as shown in FIG. 8, the backup roll 23 is placed at the upper limit position where the shear 37 is locked to the stopper 41. Then, the backup roll cover 43 is opened, the strip sample 50 is pulled out from the strip feeder 59, and set in the backup roll 23 in the same manner as described above. Reference numeral 60 in the figure indicates a strip cutter.

Next, the backup roll cover 43 is closed to the state shown in FIG. When SW ₁ shown in FIG. 15 is turned on in this state, the pickup roller 21 is moved forward by the air cylinder 31 and pressed by the applicator roll 22. Next, when SW ₂ and SW ₃ are turned on, the pickup roll 21 and the applicator roll 22 rotate and the paint in the paint pan 61 moves to the applicator roll 22 via the pick-up roll 21. .

(2) Standby Subsequently, the SW ₄ is turned on to rotate the backup roll 23, and waits until it becomes steady rotation. Then, when SW ₅ is turned on, the air cylinder 42 releases the share-37, and the air cylinder 32 advances the backup roll 23. The backup roll 23 moves forward while rotating, but the stepped portion of the shear 37 is caught by the stopper 38 and stopped, resulting in the state shown in FIG.

(3) When the coating backup roller 23 further rotates and the convex portion 33 ′ of the coaxially mounted cam disk 33 (see FIG. 1) comes to a position where it rides on the cam follower 34, When the contact switch 35 senses it, the amplifier 62 (see FIG. 15) is turned on, and as a result, the four-way solenoid valve 63 (see FIG. 15) is energized and vented to the unlocking air cylinder-39. The piston moves forward and flips Share-37 up to release the lock. Therefore, the backup roll 23 is further advanced by the air cylinder 32 and pressed by the applicator roll 22 to be in the state shown in FIG. 11, and the strip sample 50 wound around the backup roll 23 is coated.

When the backup roll 23 further rotates, the convex portion 33 ′ of the cam disk 33 moves away from the proximity switch 35, the amplifier 62 is turned off, and the power supply to the four-way solenoid valve 63 is stopped. The piston of the stop release air cylinder 39 returns to the original position. When the backup roll 23 further rotates, the cam follower 34 hits the convex portion 33 'of the cam disk 33 and the backup roll 23 is forcibly retracted, and the share 37 is hooked on the stopper 38, and the state shown in FIG. 12 is obtained. become. FIG. 13 shows the positional relationship between the cam disc 33 and the cam follower 34 when the backup roll 23 is forcibly retracted.

Next, since the supply of air to the air cylinder-32 is switched, the piston of the air cylinder-32 retracts as it is, returns to the upper limit, and becomes the state of FIG. In this way, painting is performed only once while maintaining steady rotation.

(4) Drying and Cooling Here, SW ₄ is turned off to temporarily stop the backup roll 23, close the back-up roll cover 43 as shown in FIG. 14, and then back-up roll 23 again. To rotate. Next, hot air is blown into the backup roll cover 43 from the drying / cooling air supply device 63 to dry the coating film. After drying, the hot air is switched to cold air, and this cold air is blown to the strip sample to cool it.

After cooling is completed, SW ₄ is turned off to stop the rotation of the backup roll 23. Then, remove the strip sample 50 from the backup roll 23 and finish the test.

From the coating sample obtained by such a rapid test, it is possible to grasp the coating conditions that accurately correspond to the actual strip continuous coating line, and therefore the number of trial coatings in the continuous coating line can be reduced as much as possible. It becomes possible to do.

[0042]

[Summary of effects]

 As described above, according to the present invention, it is possible to perform a "roll coating in a continuous coating line" simulation test with a small amount of material and in a short time, thereby improving the production efficiency and cost of a new coated product, Furthermore, it will bring useful effects in industry, such as being able to greatly contribute to shortening the development period of new coating materials and reducing development costs.

[Brief description of drawings]

FIG. 1 is a front view showing an example of a coating test apparatus according to the present invention.

FIG. 2 is an AA direction explanatory view of FIG.

FIG. 3 is a cross-sectional explanatory view of a backup roll and a backup roll cover.

4 is a cross-sectional view taken along the line BB of FIG.

5 is an enlarged view of part C in FIG.

FIG. 6 is a cross-sectional explanatory view of a main part of a backup roll.

FIG. 7 is a sectional view taken along line DD of FIG.

FIG. 8 is an explanatory diagram relating to a coating test process (preparation and strip sample attachment) in an example.

FIG. 9 is an explanatory diagram relating to a coating test process (at the time of completion of preparation) in the example.

FIG. 10 is an explanatory diagram related to a coating test process (standby position) in the example.

FIG. 11 is an explanatory diagram related to a coating test process (coating position) in the example.

FIG. 12 is an explanatory diagram related to a coating test process (during forced retreat) in the example.

FIG. 13 is an explanatory diagram showing the positional relationship between the cam disc and the cam follower when the backup roll is forcibly retracted.

FIG. 14 is an explanatory diagram related to a coating test process (drying / cooling position) in the example.

FIG. 15 is an example of a control circuit of the coating tester according to the present invention.

FIG. 16 is a schematic explanatory diagram of a coil continuous coating line.

[Explanation of symbols]

 1 Payoff reel 2 Payoff reel 3 Inlet side shear 4 Joiner 5 Inlet side accumulator 6 Chemical conversion treatment unit 7 Coater 8 Oven 9 Coater 10 Oven 11 Skin pass mill 12 Tension Leveler 13 Outgoing accumulator 14 Outgoing chassis 15 Tension reel 21 Pickup roll 22 Applicator roll 23 Backup roll 24 Variable speed motor 25 Variable speed motor 26 Variable speed Motor 27 Universal Joint 28 Moving Frame 29 Moving Frame 30 Linear Guide 31 Air Cylinder-32 Air Cylinder-33 Cam Disk 33 'Convex 34 Cam Follower-35 Proximity Switch 36 Cam Follower-Holder-37 Share-38 Share-Stopper − 39 Air cylinder − 40 Proximity switch 41 Stopper − 42 Air cylinder − 43 Backup roll cover 44 Disc 45 Disc 46 Curved cover 47 Bay Cover 48 Air supply port 49 Exhaust port 50 Strip sample 51 Strip clamp 52 Strip clamp 53 Strip holding bolt 54 Tension bolt 55 Pressure regulator 56 Pressure regulator 57 Four-way solenoid valve 58 Four-way solenoid valve 59 Strip feeder 60 Strip Cutter 61 Paint pan 62 Amplifier 63 Drying / cooling air supply device

Claims (2)

[Scope of utility model registration request] 1. A coating test apparatus in which a strip sample is wound around a backup roll that moves to and away from an applicator roll, and the strip sample is steadily rotated for test coating. A coating test apparatus, characterized in that the roll is covered with a cover having an inlet and an outlet for drying and cooling air and a part of the outer periphery of which can be opened and closed. 2. A coating test apparatus for winding a strip sample around a backup roll which moves to both contact and separation positions with respect to an applicator roll and rotating the strip sample steadily for test coating. A coating test apparatus comprising a backup roll moving cylinder for individually setting pressure for "pressure" and "pulling pressure".