CN105665257A - Method for buffing surface of primer by using 3M sand adhesive to increase binding force - Google Patents

Abstract

The invention proposes a method of using 3M sand stick to polish the surface of the primer to increase the binding force, which solves the phenomenon of paint falling off on the surface of the primer. The technical scheme includes: cleaning the surface of the glued joint with a cleaning agent; grinding the surface of the primer with 3M sand stick; cleaning the polished surface of the glued joint with a cleaning agent; spraying paint on the cleaned surface of the glued joint. Among them, the steps of grinding the surface of the primer with 3M sand stick are: stick the surface of the primer with 3M sand stick to grind the whole surface of the primer, and grind the surface of the primer at a constant speed and cannot stay in one place; use 3M sand on the corners, radians and edges Sticky sanding, uniform force, uniform speed and cannot stay in one place to polish the surface of the primer.

Description

A method of increasing the binding force by grinding the surface of the primer with 3M sand stick

technical field

The invention belongs to a method for pre-painting metal adhesive joints, and relates to a method for increasing the bonding force by using 3M sand to stick and polish the surface of the primer.

Background technique

For existing EC175-Z15 metal structure adhesive joints, before painting, the treatment method for the surface of the primer REDUX122 is: clean the surface of the primer with cleaning agent HYSO99 before painting, and then spray the primer after cleaning. After the paint layer is dry, do the bonding force In the test, it is often found that there is a phenomenon of paint falling off, and the paint layer only falls on the primer layer, indicating that the bonding force between the primer and the primer is not good.

Contents of the invention

Purpose of the present invention: propose a kind of method that uses 3M sand to stick and polish the surface of primer to increase binding force, and solve the phenomenon that paint falls off when spraying paint on the surface of primer.

Technical solution of the present invention: a method for increasing the binding force by grinding the surface of the primer with 3M sand stick, comprising:

Clean the surface of the adhesive joint with a cleaning agent;

Use 3M sand stick to polish the surface of the primer;

Use a cleaning agent to clean the polished surface of the bonded parts;

Spray paint on the surface of the cleaned adhesive joint.

Among them, the steps of grinding the surface of the primer with 3M sand stick are:

The surface of the primer is polished with 3M sand stick with a grinder as a whole, at a constant speed and cannot stay in one place to polish the surface of the primer;

The corners, radians and edges are polished by hand with 3M sand stick, with uniform force and speed and can not stay in one place to polish the surface of the primer.

Advantages of the invention

3M sand stick is softer than sandpaper. It is easier to operate when grinding corners, radians and edges. Using a grinder to stick 3M7447C sand stick to the surface of the primer can greatly improve the efficiency of grinding. Use 3M sand stick to polish the primer The surface color is uniform, the surface is flat, and the surface of the primer will not be scratched or leaked, avoiding the defect of uneven color on the surface of the primer when sanding the primer with sandpaper, which is easy to scratch the surface of the primer and uneven sanding force. It also avoids the defect of uneven color of the primer caused by spraying paint on the surface of such a primer, and avoids the waste caused by product repair.

Use 3M7447C sand to polish the surface of the primer, which can polish off the bright layer on the surface of the primer, remove the release agent on the surface of the primer that affects the bonding force of the paint layer and other components that affect the bonding force of the primer and the primer, and increase the paint layer. The combined force avoids product repairs and enables the smooth delivery of products.

Use 3M7447C sand stick to polish the surface of the primer, which can smooth the wrinkled texture and unevenness on the surface of the primer, which not only increases the bonding force between the primer and the primer, but also makes the surface of the paint layer after painting smoother, improving the quality of the spray paint. Greatly improve.

detailed description:

In order to solve the problem of paint peeling on metal adhesive joints, we have conducted comparative tests and found that sanding the surface of the primer with 3M7447C can increase the bonding force between the primer and the primer, thereby solving the problem of paint peeling on the surface of the primer. The phenomenon of paint occurs.

The present invention is a kind of method that uses 3M sand to stick and polish the surface of primer to increase binding force, comprising:

Clean the surface of the adhesive joint with a cleaning agent;

Use 3M sand stick to polish the surface of the primer;

Use a cleaning agent to clean the polished surface of the bonded parts;

Spray paint on the surface of the cleaned adhesive joint.

Among them, the steps of grinding the surface of the primer with 3M sand stick are:

The surface of the primer is polished with 3M sand stick with a grinder as a whole, at a constant speed and cannot stay in one place to polish the surface of the primer;

The corners, radians and edges are polished by hand with 3M sand stick, with uniform force and speed and can not stay in one place to polish the surface of the primer.

Example

EC175-Z15 metal structural adhesive parts are sent to the painting workshop for painting. First, clean the surface of the structural adhesive parts with HYSO99. After cleaning, use 3M7447C to manually polish or use a sander to stick 3M7447C to polish the surface of the primer REDUX122.

Use 3M7447C sand stick to manually polish the surface of primer REDUX122 and then spray paint

When grinding, draw a circle and use slight force to avoid leakage of the primer layer. As long as the force is uniform and does not stop at one position to grind back and forth, the primer layer and oxide layer will not be leaked when grinding with 3M sand stick. After the adhesive parts are formed under high temperature and pressure, the release agent on the mold and the silicon-containing components in the isolation film A4000 are transferred to the surface of the primer. These components are difficult to clean with the cleaning agent HYSO99. The thickness of the primer is specified at 3-8μm In between, the thickness of the primer sprayed in the workshop is between 4-7μm. The function of the primer is to protect the oxide layer and anti-corrosion effect under it. Use 3M sand stick to slightly polish the primer layer, and polish off the bright layer, and remove 2μm The left and right primer layers, as long as the primer layer is not leaked, it will play a protective and anti-corrosion role. Using 3M sand stick to polish the primer layer can not only remove its bright layer, but also remove the wrinkles and wrinkles on the primer layer. You can also remove the mold release agent and components that affect the bonding force of the paint layer on the surface of the primer, and then use the cleaning agent HYSO99 to clean and polish the primer layer. Spray P05 primer on the layer, the primer is smooth and uniform in color, and no paint peeling phenomenon is found in the bonding force test, which shows that spraying paint on the polished primer layer will help increase the bonding force of the paint layer and make the paint after spraying The surface of the layer is smoother and the color is uniform.

Use a grinder to stick 3M7447C sand stick to the surface of the primer REDUX122 and then spray paint

In order to improve the efficiency of grinding work, we divide the 3M7447C sand into two parts, stick it on the grinder, press the grinder lightly, grind the surface of the primer back and forth at a uniform speed and cannot stay in one place, and remove the bright layer on the surface of the primer. Sticking 3M7447C with a grinder to polish the surface of the primer is similar to using 3M7447C sand to manually polish the surface of the primer, but using a grinder to stick 3M7447C to grind the surface of the primer, the grinding efficiency is greatly improved. After the primer is polished, use HYSO99 to clean the surface of the primer. After passing the test, spray P05 primer. After checking the bonding force, no paint falling off was found. The surface of the paint layer is smooth and smooth, and the color is uniform and meets the delivery requirements.

So far, the 3M7447C sand bonded metal bonded parts, such as the left and right front and rear skin glued components, the bottom skin, the left and right bottom skins, etc., have been delivered by hand and sanded by a sander. After installation, there has been no paint drop phenomenon, no repair, no impact on product delivery progress, and the quality of painting has been greatly improved.

Claims (2)

1. A method of sticking and polishing the surface of primer with 3M sand to increase binding force, characterized in that, comprising: Clean the surface of the adhesive joint with a cleaning agent; Use 3M sand stick to polish the surface of the primer; Use a cleaning agent to clean the polished surface of the bonded parts; Spray paint on the surface of the cleaned adhesive joint. 2. a kind of method as claimed in claim 1 sticks and polishes the surface of the primer with 3M sand to increase the binding force, it is characterized in that the step of sticking the surface of the primer with 3M sand is: The surface of the primer is polished with 3M sand stick with a grinder as a whole, at a constant speed and cannot stay in one place to polish the surface of the primer; The corners, radians and edges are polished by hand with 3M sand stick, with uniform force and speed and can not stay in one place to polish the surface of the primer.