CN103692720B - A kind of self-lubricating Coil Coating Products and production method thereof - Google Patents

Abstract

The present invention relates to a kind of self-lubricating Coil Coating Products and production method thereof, self-lubricating Coil Coating Products is at one layer of self-lubricating coat in use of its backside coating, self-lubricating coat in use thickness 0.5 2.5g/m², production method, step includes: base material cleaning → passivation → painting front priming paint → solidification → cooling one → painting front finish paint/back side self-lubricating coating → solidification → cooling two → overlay film → check → batch.Self-lubricating Coil Coating Products of the present invention solves household electric appliances and oiling or aluminum coated steel need to be taked to increase cost and punching press damage/problem of Cracking when using 2/0 Coil Coating Products, can save lubricating oil, covering material consumption, shortens processing technique (oiling, overlay film etc.).

Description

A kind of self-lubricating color-coated plate and its production method

technical field

The invention relates to the technical field of iron and steel manufacturing, in particular to a self-lubricating color-coated plate and a production method thereof.

Background technique

Color-coated board, also known as pre-coated board, has been gradually expanded from the construction field to the home appliance field in recent years because of its good decoration, energy saving and environmental protection, easy forming, and low cost.

In the field of home appliances, the traditional steel plates for home appliance parts generally adopt the post-spraying process, that is, the steel plate is processed and then sprayed. The typical process is: galvanized plate, cold-rolled plate, etc. → stamping (stamping with lubricating oil) → cleaning →Phosphating→Spraying, etc. The post-spraying process not only has high cost and low efficiency, but also causes serious environmental pollution, which does not meet the development requirements of environmental protection and energy saving.

In order to maintain good thermal conductivity and electrical conductivity while saving costs, some home appliance parts usually only spray paint on the front side of the steel plate when applying the post-spraying process, while leaving the back side unpainted. When some parts of these home appliances are assembled with color-coated boards, it is necessary to use a coated board with a 2/0 coating structure (that is, no coating on the back).

The color-coated plate with 2/0 coating structure is used instead of the post-spraying process, and there are two restrictive problems in the application:

One is that when the color-coated board is used, it is directly assembled after stamping and forming. Therefore, oil-free stamping is required in the stamping process. The back of the color-coated board with a 2/0 coating structure does not have self-lubricating properties, and the friction resistance is large. Oil-free stamping is easy to cause Damage or even cracking of the coating or base material at the deformed part of the processed part;

The second is that the back of the color-coated plate with a 2/0 coating structure is a bare steel plate (galvanized plate or cold-rolled plate), which has low corrosion resistance, which leads to quality problems such as corrosion and rust on the shell of household appliances during use.

Contents of the invention

Aiming at the deficiencies of the prior art, the present invention provides a self-lubricating color-coated plate and a production method thereof. The self-lubricating color-coated plate is coated with a layer of self-lubricating coating on the back of the color-coated plate to improve the oil-free, Lubrication performance during stamping without coating, solve the cracking problem during stamping of color-coated plates with 2/0 coating structure, and improve the corrosion resistance of the product.

In order to solve the problems of the technologies described above, the technical solution adopted in the present invention is:

A self-lubricating color-coated plate, characterized in that a layer of self-lubricating coating is coated on the back of the color-coating plate, and the thickness of the self-lubricating coating is 0.5-2.5g/m ² .

A production method of a self-lubricating color-coated plate, the steps comprising: substrate cleaning→passivation→coating the front primer→curing→cooling 1→coating the front topcoat/back self-lubricating paint→curing→cooling 2→coating→inspection →coiling, characterized in that: in the step of coating the front surface paint/back self-lubricating paint, the highest temperature of the strip is 224-249°C, the roller coating pressure of the self-lubricating paint is 7.5-12KN, and the self-lubricating paint is applied The roller speed ratio of the coating is 100-110%/30-40%, and the thickness of the self-lubricating coating is controlled within the required range by adjusting the coating pressure;

In the step of coating the front surface paint/back self-lubricating coating, the coating thickness of the self-lubricating coating is 0.5-2.5g/m ² ;

In the first step of cooling, spray water cooling is adopted, and the spray ports are all opened, and the water pressure is 3-5Kg. In the second step of cooling, spray and spray water are used for cooling, wherein the spray ports are opened by 1/3, and the water pressure is 1-5Kg. 2Kg, through the adjustment of the cooling process, while ensuring that the plate temperature drops below 60°C, it avoids the dissolution of the cooling water on the self-lubricating coating.

The self-lubricating color-coated plate of the present invention solves the problem of increased cost and stamping damage/cracking when the 2/0 color-coated plate is used in the home appliance industry. It can save the consumption of lubricating oil and coating materials, shorten the processing technology (oiling, coating, etc.), and adopt self-lubricating color-coated board, which lays the foundation for the spraying process after the elimination of the household appliance industry, and plays a role in the technological progress and environmental protection of the industry. positive effect.

detailed description

Example 1

A self-lubricating color-coated plate, a layer of self-lubricating coating is coated on the back of the color-coating plate, and the thickness of the self-lubricating coating is 1.5g/m ² .

A production method of a self-lubricating color-coated plate, the steps comprising: substrate cleaning→passivation→coating the front primer→curing→cooling 1→coating the front topcoat/back self-lubricating paint→curing→cooling 2→coating→inspection → Coiling, the front primer coating thickness is 5 μm, the front top paint coating thickness is 15 μm, the back self-lubricating coating thickness is 1.5g/m ² , in the step of coating the front top coat/back self-lubricating coating, the maximum temperature of the strip is 235 ℃, the roller coating pressure of self-lubricating paint is 10KN, the roller speed ratio of self-lubricating paint is 105%/35%, the specification and model of self-lubricating paint is SG-E510, and the manufacturer is Shanghai Parker Sejing Co., Ltd. Spray water cooling is used in the first step of cooling, all the spray ports are opened, and the water pressure is 3Kg. In the second step of cooling, spray and spray water are used for cooling, wherein the spray ports are opened by 1/3, and the water pressure is 1Kg.

Example 2

A self-lubricating color-coated plate, a layer of self-lubricating coating is coated on the back of the color-coating plate, and the thickness of the self-lubricating coating is 0.8g/m ² . A production method of a self-lubricating color-coated plate, the steps include: substrate cleaning→passivation→coating the front primer→curing→cooling 1→coating the front topcoat/back self-lubricating paint→curing→cooling 2→(coating) →Inspection→coiling, the thickness of the front primer coating is 9μm, the thickness of the front topcoat coating is 10μm, the thickness of the back self-lubricating coating is 0.8g/m ² , and the highest temperature of the strip is applied in the front topcoat/back self-lubricating coating in steps The temperature is 224°C, the roller coating pressure is 12KN, the roller speed ratio is 105%/35%, and the concentration of self-lubricating paint is 100%. Spray water cooling is adopted, the spray ports are all opened, and the water pressure is 4Kg. In the second cooling step, spray and spray water are used for cooling, wherein the spray ports are opened by 1/3, and the water pressure is 1.5Kg.

Example 3

A self-lubricating color-coated plate, a layer of self-lubricating coating is coated on the back of the color-coating plate, and the thickness of the self-lubricating coating is 2.3g/m ² .

A production method of a self-lubricating color-coated plate, the steps include: substrate cleaning→passivation→coating the front primer→curing→cooling 1→coating the front topcoat/back self-lubricating paint→curing→cooling 2→(coating) →Inspection→coiling, the thickness of the primer coating on the front is 7μm, the thickness of the topcoat on the front is 20μm, the thickness of the self-lubricating coating on the back is 2.3g/ ^m2 , the highest temperature of the strip is applied in the front topcoat/back self-lubricating coating in steps The temperature is 245℃, the roller coating pressure is 7.5KN, the roller speed ratio is 105%/35%, and the concentration of self-lubricating paint is 100%. Spray water cooling is used in the middle, the spray ports are all opened, and the water pressure is 5Kg. In the second cooling step, spray and spray water are used for cooling, wherein the spray ports are opened by 1/3, and the water pressure is 2Kg.

The following performance tests were carried out on the self-lubricating color-coated sheets produced in Examples 1-3, and the test results are shown in Table 1.

Table 1 embodiment coating performance test result

Example Kinetic friction coefficient of back surface (μm) Salt spray resistance, h UV aging (UVA-340), h 1 0.24 ≥240 ≥600 2 0.26 ≥240 ≥600 3 0.23 ≥240 ≥600

Claims (4)

1. a self-lubricating Coil Coating Products, it is characterised in that: at one layer of self-lubricating coat in use of Coil Coating Products backside coating, self-lubricating coat in use is thick Degree 0.5-2.5g/m²；The self-lubricating coating specifications and models that described self-lubricating coat in use uses are SG-E510；

The production method step of described self-lubricating Coil Coating Products includes: base material cleans → passivation → painting front priming paint → solidification → cooling one → painting front finish paint/back side self-lubricating coating → solidification → cooling two → overlay film → check → batch, it is characterised in that: described step Being coated with in front finish paint/back side self-lubricating coating, strip maximum temperature is 224-249 DEG C, and the roller coat pressure of coating self-lubricating coating is 7.5 12KN, the roller speed ratio of coating self-lubricating coating is 100-110%/30-40%；

Described step is coated with in front finish paint/back side self-lubricating coating, and coating self-lubricating coating thickness is 0.5-2.5g/m²；

Using spray water-cooled in described cooling one step, mouth spray is all turned on, hydraulic pressure 3-5Kg, adopts in described cooling two step Cooling down with spraying and shower water, wherein mouth spray opens 1/3, hydraulic pressure 1-2Kg.

2. the production method of self-lubricating Coil Coating Products as claimed in claim 1, step includes: base material cleans → passivation → painting front Priming paint → solidification → cooling one → painting front finish paint/back side self-lubricating coating → solidification → cooling two → overlay film → check → batch, its Being characterised by: described step is coated with in front finish paint/back side self-lubricating coating, and strip maximum temperature is 224-249 DEG C, coating is from profit The roller coat pressure of sliding coating is 7.5 12KN, and the roller speed ratio of coating self-lubricating coating is 100-110%/30-40%.

3. production method as claimed in claim 2, it is characterised in that: described step is coated with front finish paint/back side self-lubricating coating In, coating self-lubricating coating thickness is 0.5-2.5g/m²。

4. production method as claimed in claim 2, it is characterised in that: described cooling one step uses spray water-cooled, spray Mouth is all turned on, hydraulic pressure 3-5Kg, uses spraying and shower water to cool down, wherein mouth spray unlatching 1/3 in described cooling two step, Hydraulic pressure 1-2Kg.