JPS58223461A - Coating method of sealing material - Google Patents

Abstract

PURPOSE:To coat sealing material automatically and accurately by spouting sealing material from a nozzle while moving relatively keeping distance between the nozzle and an object to be coated. CONSTITUTION:A robot is operated and the spouting hole 4 of a nozzle 1 is faced to the joint 7 keeping specified distance. Keeping this condition, the nozzle 1 is moved on the joint 7, and sealing material 8 is spouted from the nozzle 1. Then, the sealing material 8 collides with the joint 7 and spreads by its own kinetic energy and coats the joint 7 in beltlike form of fixed thickness. By this way, the joint can be sealed with the sealing material without using hands.

Description

[Detailed Description of the Invention] Conventionally, a sealing material applied to a joint between sheet metals in an automobile body, etc. for the purpose of waterproofing, etc. is discharged from a nozzle that moves while contacting the joint, and is applied onto the joint. The worker then presses the applied sealant with a brush or the like to ensure that the sealant adheres to the joint.

Therefore, in addition to the application work, it is necessary to press the sealant, resulting in high costs (and because the nozzle moves while contacting the sheet metal, the nozzle and the sheet metal are damaged, causing accelerated wear of the nozzle. When a robot is used to apply sealant, the nozzle must be moved so that it is always positioned over the seam, and the position of the seam must be detected accurately. It was difficult to accurately detect the position, and therefore a larger amount of sealant was applied than necessary.

The present invention solves the above-mentioned problems by moving the nozzle and the object relative to each other while keeping a space between them.
Spraying a sealant from the nozzle toward the object to be coated;
The present invention relates to a method for applying a sealant, characterized in that the sealant is spread over the object to be coated by its own discharge pressure.

The following is a detailed explanation of one embodiment of the present invention. Ru.

In FIGS. 1 and 2, a nozzle 1 is connected to a pump via a hose (not shown), and the pump is communicated with a sealing material reservoir. . A medium diameter section 3 connected to the large diameter section 2. A small diameter section 10 connected to the medium diameter section 3. A spout 4 communicating with the small diameter section 10 and having a diameter of 0.4 cm. 5 and 6 are sheet metal forming the body of the car, 7 is the joint between both sheet metals 5.
is a sealing material made of vinyl chloride sol containing vinyl chloride, calcium carbide, and phthalate ester. Also.

The nozzle 1 is attached to the tip of the robot 9.

Then, when the vehicle body is stopped and fixed at a predetermined position, the robot 9 is operated to cause the spout 4 of the nozzle 1 to face the joint 7. At this time, the distance between the jet nozzle 4 and the joint 7 is 5 mm, the longitudinal axis of the nozzle 1 is perpendicular to the plates 5 and 6, and the nozzle 1 moves on the joint Z while maintaining this state. Further, when the spout 4 faces the seam 7, the sole material 8 is supplied to the nozzle 1.

The sealing material 8 is ejected from the ejection port 4 at a speed of 4 m/s toward the seam 7 in the form of a rod. It is a seal-like covering applied to the seam 7. Note that the ratio of thickness to width is 1:5.

Therefore, the sole material 8 is pushed and spread over the joint 7 and the sheet metals 5 and 6 near the joint 7 by its own kinetic energy, and the sole material 8 is sufficiently spread over the joint 7. Sheet metal 5. This eliminates the need for 9 workers to further press the sealing material onto the vehicle body using a brush or the like in order to adhere to the sealing material, thereby reducing costs. In addition, since the nozzle 1 maintains a constant distance from the seam 7, there is no contact resistance between the nozzle 1 and the seam 7, and the movement of the nozzle 1 is smooth.
Furthermore, since the sealing material 8 is pushed and spread, the sealing material 8 can reliably seal the joint 7 even if the position of the joint 7 is slightly shifted.

In the above embodiment, the diameter of the spout 4 is set to 0.4 mm, but if it is 0.2 to 1.0 mm, it is good, but if it is less than 0.2 mm, it is too thin and may become clogged. If the number exceeds 10, the attached sealing material will become too thick and will be wasted. A range of 0.35 to 0.5 s mm is particularly preferred.

In addition, the viscosity of the seal material 80 is 7 to 12 x 10' for conventional products.
cp (centipoise), but 4 to 7 x 10'cp is preferred for easier flowering.

The discharge pressure is 60 to 120 kg/cd with conventional sealing equipment.
However, 20 to 100 ky/(, ( is preferable).

The distance between the nozzle spout 4 and the joint 7 is 2 to 10 mm, and 2
If it is less than 10 mm, the sealing material 8 applied to the seam 7 will adhere to the spout 4, and if it exceeds 10 mm, the kinetic energy of the sole material 8 when it collides with the seam 7 will be insufficient, making sure to The sealing material 8 is not pushed out and the width and thickness of the attached sealing material 80 are not constant. Moreover, the adhesion force is also insufficient.

[Brief explanation of drawings]

FIG. 1 is a front view showing one embodiment of the present invention, and FIG. 2 is a front view showing one embodiment of the present invention.
FIG. 2 is an enlarged cross-sectional view of the main part of the figure. 1: Nozzle, 4: Spout. 7: Seam, 8: Sealing material Figure 1 Figure 2

Claims (1)

[Claims] The nozzle and the object to be coated are moved relative to each other with a gap between them, and the sealing material is ejected from the nozzle toward the object to be coated, and the sealant is applied to the object to be coated under its own discharge pressure. A sealing material application method characterized by being spread by