JPS637103B2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a method and apparatus for applying a high viscosity liquid to the inner surface of a pipe, cylinder, etc.

The technology for methods and equipment for applying liquids such as paints with lower viscosity than conventional ones to the inner surface of tubular bodies is as follows.
A variety of methods have been developed, but none of them are suitable for applying adhesives or highly viscous paints.

In the present invention, a coating tube that can be freely rotated and stopped is rotated to coat the inner circumferential surface of the object to be coated in a rotating tube body, and then the rotation is stopped and the excess after coating is removed. It is an object of the present invention to provide a method and apparatus for applying a liquid agent, the gist of which is to remove the liquid agent, level the liquid agent layer, and obtain a uniformly applied liquid layer with a predetermined thickness.

Next, the present invention will be explained based on the drawings.

First, referring to FIGS. 1 to 3, a coating tube 2 and a liquid supply tube 3 are disposed within the inner peripheral surface of the object 1 to be coated.
and each nozzle 4 of the liquid agent supply cylinder 3 is placed in the space between the opposing surfaces of the upper part of the liquid agent supply cylinder 3 and the application cylinder 2.
... to force the liquid to accumulate and keep the gap 5 between the coating tube 2 and the liquid supply tube 3 wider than the thickness of the liquid layer 6 to be applied to the inner surface of the object 1 to be coated. After applying the liquid to the inner circumferential surface of the object 1 by rotating the object 1 and the coating cylinder 2 with a required gap between the inner surface and the inner surface, only the rotation of the application cylinder 2 is stopped and the coating cylinder 2 is rotated. This is a method of scraping off the excess of the liquid agent layer 6 on the inner circumferential surface of the coated object 1 and applying the liquid agent layer 6 to a uniform thickness.

Note that the direction of rotation of the object 1 and coating tube 2 varies depending on the viscosity of the liquid to be coated; in the case of extremely high viscosity liquids, they rotate in the same direction, and in the case of slightly low viscosity liquids, they rotate in opposite directions. Sometimes I let them do it.

Next, the device will be explained.

Holding plates 7 and 8 are installed on both end surfaces of the applicator tube 2 and the liquid supply tube 3 to maintain a required gap between the two tubes 2 and 3, and a rotating shaft 9 is provided at the center of the applicator tube 2. is inserted through the brake motor 12 through bevel gears 10 and 11 at one end, and connected to the brake motor 12 through the bevel gears 10 and 11 at the other end.
is longer than the total length of the coating tube 2 (for example, the total length is
A passage 13 for pressure-feeding the liquid agent from the outside is provided inside (the length should be about 0.1 mm), and a connecting rod 14 is provided protruding from one end surface of the supply tube 3 so that this can communicate with a liquid agent supply tank (not shown). An appropriate number of nozzles 4 are bored between the outer peripheral surface of the supply cylinder 3 and the passage 13, and the inner peripheral surfaces of the application cylinder 2 and the object to be coated 1 are connected to the tips of the holding plates 7 and 8 on the application cylinder 2 side. Rollers 15 and 16 are fitted to maintain a constant gap between them, and when the outer circumferential surfaces of the rollers 15 and 16 come into contact with the inner circumferential surface of the object 1, the outer circumferential surface of the coating cylinder 2 and the object are connected. A desired gap is maintained between the coated material 1 and the inner circumferential surface of the coated material 1,
Furthermore, since the total length of the supply tube 3 is longer than the total length of the coating tube 2, there is a very small gap between the end faces of the holding plates 7, 8 and the coating tube 2 (for example, considering the above example, the gap is about 0.05 mm). This helps to prevent the liquid on the outer circumferential surface of the coating tube 2 from leaking to the end surface of the coating tube 2, and furthermore, the pressure applied to the inner circumferential surface of the object to be coated 1 by these devices is controlled by hydraulic pressure, springs, etc. It moves according to the shape of the object to be coated 1 even when the inner circumferential surface of the object 1 is deformed by using the elastic force of the object, so that a constant gap between the coating tube 2 and the coating tube 2 is always maintained even when the inner circumferential surface of the object is deformed. This is what I did.

An embodiment of the present invention having the above configuration will be explained based on FIGS. 5 and 6.

FIGS. 5 and 6 show the apparatus of the present invention applied to a workpiece 1.
For example, in FIG. 6, the workpiece 1 shown by the virtual line on the left has its outer peripheral surface processed and is transported. In this apparatus, the inner circumferential surface of the object 1 to be coated is first polished, that is, after the inner circumferential surface is polished in the polishing section 17, a liquid is applied to the inner circumferential surface. After being transferred to a coating device and having the liquid agent applied to the inner peripheral surface by this device, it is transferred to the next processing step.

Transfer of the object 1 to be coated within the apparatus is carried out by hydraulic transfer chucks 18, 19, 20,
During polishing and coating, the workpiece is supported by collect chucks 21, 22, etc., which are capable of forward and reverse rotation. Also three transfer chucks 18, 19, 20
It is preferable that the intervals between them are the same and that they can be moved left and right and forward and backward in FIG. 6, and that the polishing time and the coating time are the same as possible. 23 in the diagram
indicates the hydraulic mechanism of this device.

Since the present invention is a method and apparatus as described above, it is possible to automatically apply a high viscosity liquid such as an adhesive to the inner surface of a cylindrical cylinder very easily and to a uniform thickness, and also to coat the object The process of the present invention can be easily incorporated into the processing process of the present invention, and the manufacturing process is simple, which has extremely significant effects.

[Brief explanation of the drawing]

FIG. 1 is a plan view showing one embodiment of the present invention, and FIG.
The figure is a sectional view of the main part of the present invention, FIG. 3 is a perspective view of the main part, FIG. The same side view, Figure 4C is also an enlarged plan view of the main part, Figure 5
The figure is a side view showing one state of use of the present invention, and FIG. 6 is an explanatory front view. DESCRIPTION OF SYMBOLS 1...Object to be coated, 2...Coating tube, 6...Liquid layer, 7, 8...Holding plate, 15, 16...Roller.

Claims (1)

[Scope of Claims] 1. While rotating the object to be coated, the coating tube is rotated in correspondence with the inner circumferential surface of the object to be coated while supplying an appropriate amount of high viscosity liquid to the outer circumferential surface of the coating tube. After applying the liquid to the inner circumferential surface of the object to be coated, the rotation of the coating cylinder is stopped, and the excess liquid applied to the inner circumferential surface of the object to be coated is removed to remove the liquid layer on the inner circumferential surface. A method of applying a highly viscous liquid to the inner surface of a tube, which is characterized by uniform coating. 2. Holding plates are provided at both ends, and a rotatable coating tube capable of holding a liquid agent is provided on the outer peripheral surface, and rollers are provided on both holding plates to maintain a constant gap between the coating tube and the inner circumferential surface of the object to be coated. A device that applies a high viscosity liquid to the inner surface of a pipe.