Method for eliminating creases at the head of stainless steel damping composite plate

Abstract

The application discloses a method for eliminating creases at the head of a stainless steel damping composite plate, and the method comprises the following steps: setting a spray cooling device at the outlet of a base plate heating furnace of a composite plate production line; and when the head of the base plate and the composite plate passes through the composite roller by a certain distance, a PLC programmable controller controls the spray cooling device to cool, so that the temperature difference between the base plate and the composite plate is reduced, the composite plate is not prone to expansion and contraction, and thus the creases are eliminated.

Description

TECHNICAL FIELD

[0001] The present application relates to the field of stainless steel composite plate production line, in particular to a method for eliminating creases at the head of stainless steel damping composite plate. BACKGROUND

[0002] The stainless steel damping composite plate is a laminated composite material formed by bonding the base plate and the stainless steel composite plate together with the adhesive. Compared with pure stainless steel, it has low cost and excellent damping and noise reduction properties, and also has decoration and cold bending performance not inferior to pure stainless steel, and is often used on elevator and iconic building curtain wall and interior wall.

[0003] The current production process of stainless steel damping composite plate is as follows: firstly, the base plate and the composite plate are heated after being uncoiled; secondly, the adhesive is added between the base plate and the composite plate and then hot-pressed; finally, the composite plate product is water-cooled and then wound. However, during the production process, the temperature of the composite plate is low, the temperature of the base plate is high, and the temperature of the composite roller tends to be normal or slightly higher than normal. When the composite plate is being combined, the base plate will transfer heat to the composite plate, the lower surface of the composite plate will expand due to heat, and the upper surface of the composite plate will contract due to contact with the cold composite roller. The composite plate is thin and has poor rigidity, so the expansion and contraction stress is likely to be greater than its rigidity, resulting in longitudinal creases. The length of the creases starts from the composite plate pressing position and continues for 30-100 meters before gradually disappearing. The traditional method for eliminating the creases is to reduce the tension of the composite plate when the composite plate is being combined. Although this method can eliminate the creases, it causes the following problems: (1) the composite plate is in a state of long-term no tension, and the longer the distance, the easier the deviation. If the deviation of the composite plate is small, the deviation needs to be corrected for a long time after the tension is restored to eliminate the creases, which consumes time and effort and reduces the product yield. If the deviation of the composite plate is serious, the composite plate cannot be corrected and will directly run out of the laminating roller, resulting in production failure; (2) if the deviated composite plate and the creases are cut off, the composite plate and the creases are likely to be stuck in the cutter, causing steel accumulation and stopping the machine, which seriously affects normal production and also causes at least 50-100 meters of stainless steel damping composite plate to become waste material, which is not conducive to controlling the production cost; (3) if the longitudinal creases of the stainless steel composite plate cannot be controlled in a long distance, the creases will cause scratches and cuts on the subsequent extrusion roller, resulting in the inability of the extrusion roller to dry, which causes water stains on the surface of the stainless steel damping composite plate, reducing the product yield; (4) the creases will cause scratches and cuts on the glue roller, resulting in uneven glue brushing and accelerating the wear of the glue roller. SUMMARY

[0004] The present application provides a method for eliminating creases at the head of a stainless steel damping composite plate, which aims to solve the problem of low product yield and production efficiency caused by the method of eliminating the creases of the composite plate by reducing the tension of the composite plate.

[0005] This invention discloses a method for eliminating wrinkles at the head of a stainless steel vibration-damping composite plate. A spray cooling device is installed at the outlet of the substrate heating furnace. The spray cooling device includes a cooling pipe with several nozzles pointing towards the composite plate production line, and a solenoid valve is also installed on the cooling pipe. A displacement sensor is installed on the composite roller, electrically connected to the signal input terminal of a PLC programmable controller, and the signal output terminal of the PLC programmable controller is electrically connected to the solenoid valve. The method specifically includes the following steps:

[0006] Step 1: After unwinding the substrate and cladding, place them separately in their respective heating furnaces for heating;

[0007] Step 2: Apply adhesive between the substrate and the cladding and then heat-press them together;

[0008] Step 3: Pass the lead of the substrate and the cladding through the composite roller. After the lead is laminated, tension is established on the cladding. The composite board of the substrate and the cladding continues to move forward along the composite board production line. When the displacement sensor detects that the lead of the composite board extends 0.2 to 0.3 meters, it feeds a signal back to the PLC programmable controller. The PLC programmable controller receives the signal and controls the solenoid valve of the spray cooling device to open for cooling. When the displacement sensor detects that the lead of the composite board extends 0.5 to 1 meter, it feeds a signal back to the PLC programmable controller. The PLC programmable controller receives the signal and controls the solenoid valve of the spray cooling device to close.

[0009] Preferably, in step one, the substrate heating temperature is 180℃~240℃, and the lamination heating temperature is 88℃~132℃; in step three, the production line speed is 6m / min~15m / min, and the lamination tension is 480kg~720kg.

[0010] Preferably, the substrate heating temperature is 216℃~240℃, the cladding heating temperature is 102℃~106℃, and the production line speed is 6m / min~10m / min.

[0011] Compared with the prior art, the beneficial effects of the present invention are as follows:

[0012] 1. The method for eliminating creases at the head of stainless steel vibration damping composite plates provided by the present invention involves setting up a spray cooling device at the substrate heating furnace. When the head of the substrate and the composite plate passes through the composite roller for a certain distance, the PLC programmable controller controls the spray cooling device to cool the substrate and reduce the temperature difference between the substrate and the composite plate, making the composite plate less prone to expansion and contraction, thereby eliminating creases. This method replaces the traditional method of reducing tension on the composite plate to eliminate creases, greatly improving production efficiency and yield, saving production costs, and is safe, convenient, and highly practical.

[0013] 2. The method for eliminating creases at the head of stainless steel vibration damping composite panels provided by this invention can eliminate creases within 3m. Compared with traditional methods for eliminating creases, which result in 50 to 100 meters of waste material, the waste rate is greatly reduced. Furthermore, it will not cause scratches or abrasions to the subsequent extrusion rollers and rubber rollers, thus extending the service life of the composite panel production line and ensuring its normal operation. Attached Figure Description

[0014] Fig. 1 This is a schematic diagram of the spray cooling device of the present invention.

[0015] Fig. 2 This is a circuit connection diagram of the present invention;

[0016] In the diagram: 1-Composite board production line; 2-Cooling pipe; 3-Atomizing nozzle; 4-Solenoid valve. Detailed Implementation

[0017] The present invention will be further described below with reference to the accompanying drawings:

[0018] like Figs. 1-2 As shown, this invention provides a method for eliminating wrinkles at the head of a stainless steel vibration-damping composite plate. A spray cooling device is installed at the outlet of the substrate heating furnace. The spray cooling device includes a cooling pipe 2 with eighteen atomizing nozzles 3 facing the composite plate production line 1. A solenoid valve 4 is also installed on the cooling pipe 2. A displacement sensor is installed on the composite roller, electrically connected to the signal input terminal of a PLC programmable controller. The signal output terminal of the PLC programmable controller is electrically connected to the solenoid valve 4. The method specifically includes the following steps:

[0019] Step 1: After uncoiling the galvanized substrate with dimensions of 0.9mm*1250mm and the 304 stainless steel cladding with dimensions of 0.26mm*1250mm, place them separately in their respective heating furnaces for heating.

[0020] Step 2: A mixture of polyester resin and epoxy resin with a mass ratio of 1:0.3 is added between the galvanized substrate and the 304 stainless steel cladding plate and hot-pressed together.

[0021] Step 3: Pass the strips of the galvanized substrate and the 304 stainless steel cladding plate through the composite roller. After the strips are combined, tension is established on the 304 stainless steel cladding plate. The composite plate of the galvanized substrate and the 304 stainless steel cladding plate continues to move forward along the composite plate production line 1. When the displacement sensor detects that the strip of the composite plate extends 0.2 meters, it feeds a signal back to the PLC programmable controller. The PLC programmable controller receives the signal and controls the solenoid valve 4 of the spray cooling device to open for cooling. When the displacement sensor detects that the strip of the composite plate extends 0.5 meters, it feeds a signal back to the PLC programmable controller. The PLC programmable controller receives the signal and controls the solenoid valve 4 of the spray cooling device to close, and normal production resumes.

[0022] By setting different heating temperatures and production line speeds, and adjusting the cooling state of the galvanized substrate and the 304 stainless steel laminate before lamination, the crease lengths were compared. The results are shown in Table 1.

[0023] Table 1. Comparison of Temperature Control Schemes and Fold Lengths for Stainless Steel Vibration Damping Composite Plates

[0024]

[0025] Comparing Comparative Example 1 with Examples 1-2, it can be seen that by using the spray cooling device of the present invention to cool the lamination with water before lamination, the crease length can be shortened from 50 meters to 0.6 meters, greatly reducing the scrap rate. Furthermore, comparing Examples 1-2, it can be seen that whether or not the lamination board is cooled before lamination has little effect on improving the crease length.

[0026] Comparing Comparative Example 2 with Examples 3-4, it can be seen that by using the spray cooling device of the present invention to cool the lamination with water before lamination, the crease length can be shortened from 100 meters to 2 meters, greatly reducing the scrap rate. Furthermore, comparing Examples 3-4, it can be seen that whether or not the lamination board is cooled before lamination has little effect on improving the crease length.

[0027] Therefore, simply adding a spray cooling device at the outlet of the substrate heating furnace 2 to cool the upper surface of the substrate can eliminate crease defects and greatly improve the yield.

Claims

1. A method for eliminating the creases at the head of a stainless steel damping composite sheet strip, characterized by: The spray cooling device is arranged at the outlet of the substrate heating furnace, and comprises a cooling pipe (2) provided with a plurality of atomizing nozzles (3) facing the composite board production line (1) and an electromagnetic valve (4). Step one: after the base plate and the composite plate are unwound, they are placed in the respective heating furnaces for heating; Step two: a bonding agent is added between the base plate and the composite plate for hot pressing; Step three: the strip head of the base plate and the composite plate passes through the composite roller, and after the strip head is combined, the composite plate is tensioned, and the composite plate continuously moves forward along the composite board production line (1), when the displacement sensor detects that the strip head of the composite plate extends 0.2-0.3 meters, the signal is fed back to the PLC programmable controller, and the PLC programmable controller receives the signal to control the electromagnetic valve (4) of the spray cooling device to open for cooling; when the displacement sensor detects that the strip head of the composite plate extends 0.5-1 meters, the signal is fed back to the PLC programmable controller, and the PLC programmable controller receives the signal to control the electromagnetic valve (4) of the spray cooling device to close.

2. The method for eliminating the crease at the head of the stainless steel damping composite panel strip according to claim 1, characterized in that: In step one, the heating temperature of the base plate is 180-240°C, and the heating temperature of the composite plate is 88-132°C; in step three, the production line speed is 6-15 m / min, and the composite plate tension is 480-720 kg.

3. The method of claim 2, wherein the method further comprises: applying a laser beam to the stainless steel damping composite panel to remove the wrinkles at the head of the stainless steel damping composite panel. The base plate heating temperature is 216-240°C, and the composite plate heating temperature is 102-106°C; the production line speed is 6-10 m / min.

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