JPS5832882B2 - How to apply paint to the striatum - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a coating method for uniformly applying a paint onto the surface of a filament.

Conventionally, in applying paint to the striated bodies, the striated bodies are passed through a paint container, and a large amount of viscous paint in a solution state is deposited on the surface of the striated bodies, and the paint is moved together with the striated bodies.

This paint-coated strip is passed through a die to squeeze out excess paint and coat the strip to the required thickness.

In this case, the coating die receives a force in the direction of movement of the filament due to the shearing force of the viscous paint.

For this reason, it is difficult to obtain a uniform film thickness because the die is mechanically fixed or its movement is restricted by the die holder.

Therefore, the floating die shown in Figure 1 was devised.

In Fig. 1, the filamentous body 3 introduced from the bottom surface 1 of the paint container
The floating die 4 is coated with an excessive amount of paint 2.

The floating die squeezes out excess paint adhering to the surface of the filament, and the weight of the die is adjusted to balance the shearing force caused by the viscosity of the paint generated at this time.

Although this floating die is not subject to unnecessary mechanical restrictions, it is difficult to balance the weight of the die due to the diameter of the filament, the speed of movement of the filament, and the viscosity of the paint.

Furthermore, there is nothing to directly or indirectly hold the filament at the position of the floating die, and the filament vibrates in a direction perpendicular to the direction of movement of the filament.

However, since the floating die is loaded with weight to balance the shearing force of the paint, it is difficult to follow the vibrations of the filament, making it difficult to stably obtain a uniform film thickness.

The present invention has been made to eliminate the above-mentioned drawbacks.

The details will be explained below with reference to FIG. 2, but the invention is not limited to this.

In the present invention, the weight of the coating (squeezing) die 4 is set to be heavier than the weight that balances the shearing force due to the viscosity of the paint that is generated when the excess paint 2 deposited on the surface of the filament body 3 is squeezed out with the die. to prevent it from floating.

A flat die support 5 having a passage hole for the filament was also provided.

Therefore, the die 4 is held on the die support 5, and the paint which is slightly thicker than the actual target coating amount passes through the passage hole of the support and reaches the inner wall portion of the die.

The inner wall of the die becomes above atmospheric pressure due to the shearing force caused by the viscosity of the paint that is generated when it is squeezed out with the die, and this force creates a small gap between the bottom of the die and the top of the die support, allowing the surplus that has passed through the passage hole of the die support to be removed. Paint flows out evenly in the circumferential direction.

In this way, the die can move freely in the lateral direction without being in direct contact with the support, and the die can easily be coaxial with the filament.

In this case, the weight of the coating die is heavier than the weight that balances the shearing force caused by the viscosity of the paint that is generated when the die squeezes out the excess paint adhered to the surface of the filament, and the pressure of the paint on the inner wall of the die Therefore, it is necessary to make the weight lighter than the weight that balances the force that oozes into the paint from the contact surface between the lower part of the die and the upper surface of the die support, that is, from the gap.

Further, in order to increase the pressure on the inner wall of the die, it is desirable that the through hole of the die support be formed into a tapered curved shape as shown in FIG.

As can be seen from the foregoing, the method of the present invention as described above has advantages such as easy selection of die weight and stably obtaining a uniform film thickness.

[Brief explanation of the drawing]

In the drawings for explaining the method of applying paint to the filamentary body, FIG. 1 shows the conventional method, and FIG. 2 shows the method of the present invention. DESCRIPTION OF SYMBOLS 1...Bottom surface of paint container, 2...Paint, 3...Striae body, 4...Dice for coating, 5...Dice support.

Claims (1)

[Claims] 1. A flat die support with passage holes for the filament is provided, and the weight of the die is determined from the weight that balances the shearing force generated by the viscosity of the paint when squeezing out excess paint adhered to the surface of the filament with the die. A weighted die is placed on the support, and when the die is used to squeeze out excess paint adhering to the surface of the filament as it progresses through the passage hole of the support, the paint is removed from the surface where the bottom surface of the die and the top surface of the support come into contact. A method for applying paint to the striatum, characterized by making it ooze out.