A roll coater with a recirculation loop is disclosed. Waste coating material form the roll coater is treated in an agitator unit containing, for example, one or more ultrasonic transducers, and optionally a filtration unit and/or temperature control unit to produce reconditioned coating solution, such as a reconditioned sol-gel precursor solution. Also disclosed is preventative maintenance module comprising a cleaning unit that is designed to engage and clean the applicator and/or metering rolls in a roll coater.

Roll coatings sol-gel precursors

PROBLEM TO BE SOLVED: To provide a coating apparatus of a strip material which is capable of uniformly forming a film excellent in adhesiveness on a steel plate with high speed. SOLUTION: The reverse roll coater type continuous coating apparatus comprises a preliminary coating mechanism 3, the coating mechanism 4 and a baking furnace 5, and is further provided with a peripheral speed detection means 9 to detect the peripheral speed VP of the pick-up roll and a controlling means 7 to calculate the peripheral speed ratio Vp of the pick-up roll based on VP/Vb from a line speed Vb inputted from a host computer and a line speed Vb inputted from the peripheral detection means 9 so that the peripheral speed ratio Vp of the pick-up roll satisfies 0.2<Vp<0.8. COPYRIGHT: (C)2007,JPO&INPIT

Coating apparatus of strip material and coating method

The invention discloses a coating adhesive tank structure The coating adhesive tank structure comprises an adhesive tank, wherein a feeding hole is formed at one side of the adhesive tank, overflow tanks are arranged at two ends of the adhesive tank respectively, a tank wall between the overflow tank and the adhesive tank is lower than that at the periphery of the adhesive tank, a backflow tank is arranged at the other side of the adhesive tank, the backflow tank is communicated with the overflow tanks, and the backflow tank is provided with a backflow hole communicated into the backflow tank The coating adhesive tank structure also comprises an adhesive blocking plate which is arranged in the adhesive tank and is positioned in front of the feeding hole, wherein the bottom edge of the adhesive blocking plate is not connected with the bottom of the adhesive tank or is partially connected with the bottom of the adhesive tank, the left edge of the adhesive blocking plate is not connected with the left tank wall of the adhesive tank or is partially connected with the left tank wall of the adhesive tank, and the right edge of the adhesive blocking plate is not connected with the right tank wall of the adhesive tank or is partially connected with the right tank wall of the adhesive tank According to the coating adhesive tank structure, the overflow tanks at two ends of the adhesive tank can enable the overflowed adhesive to flow back, so that the adhesive cannot be overflowed completely, the waste is reduced finitely, the cost is saved, and the adhesive is prevented from splashing on the surface of the machine to influence the appearance of the machine

Coating adhesive tank structure and coating machine using same

PROBLEM TO BE SOLVED: To provide a coating film thickness control process of a belt-like object by a roll coater which is capable of accurately calculating the application conditions when the thickness of a rubber lining of an applicator roll is 5-50 mm SOLUTION: The coating film thickness control process of the belt-like object comprises a step of controlling the coating film thickness in continuously applying the coating onto the transferring belt-like object 2 using the roll coater 1 The initial setting is conducted by calculating the application conditions that the coating film thickness M becomes the range of tolerance of the target film thickness using model formula including the relationship of the coating film thickness M, the spacing hma between the applicator roll 12 and the metering roll and the spacing has between the applicator roll 12 and the belt-like object 2 The application conditions are calculated by obtaining the value of h'ma and h's and then substituting the values of h'ma and h'as for hma and has in the model formula COPYRIGHT: (C)2007,JPO&INPIT

Coating film thickness control process of beltlike object by roll coater

PROBLEM TO BE SOLVED: To provide a paint pan for a roller coater capable of preventing a cluster of bubbles, which is generated by fall of excess paint squeezed down from the pickup roll coater device, from being caused. SOLUTION: The paint pan for a roller coater is formed of a paint storage part 11, in which a part of a pickup roll is dipped, and of an overflow wall 12 provided on the position side where excess paint falls. This excess paint is squeezed down in the rolling contact position of the pickup roll and an applicator roll. Plenty of bubbles generated by fall of excess paint, are overflowed together with the paint. This paint containing bubbles is recovered in a paint recovery part in the outside of an overflow wall 12. Oblique guide faces 15, 16, in which depth is made deeper according to approating the inside from the right and left side walls 10c, 10d, are provided in the paint recovery part. A paint return port 17 is formed in the deepest part thereof and paint is returned to a circulation tank of the outside. COPYRIGHT: (C)1998,JPO

Paint pan for roll coater

PURPOSE: To highly precisely control the thickness of a film formed on a strip even when a paint having a non-Newtonian viscosity behavior is used. CONSTITUTION: The difference between the supply flow rate qA of a paint supplied to a strip from an applicator roll obtained by using the gap between the applicator roll and pickup roll obtained by applying the elastodynamic lubrication theory and the leak flow rate qL left on the applicator roll 16 obtained by using a gap between the applicator roll 16 and a steel strip S is used to prepare a film thickness control equation, and the film thickness is controlled according to the equation. Further, the relation between the shear rate and the measured apparent viscosity is previously obtained, the equation of the measured apparent viscosity and gap is allied with the equation of the shear rate to obtain the true apparent viscosity, and both gaps are respectively obtained by using the true apparent viscosity. COPYRIGHT: (C)1995,JPO

Ichirou Tanoguchi

Papers

Paint pan for roll coater

Method for controlling coating film thickness of strip by roll coater