Pressureless roll peeling device and peeling method for polyurethane foam product

Abstract

The application discloses a pressure-free roller type stripping device for polyurethane foam products, which comprises a rack, a cooling roller unit connected to the rack, upper and lower driving roller units respectively above and below the cooling roller unit, an ultrasonic probe located between the upper and lower driving roller units, and guide roller units respectively connected to the rack before the cooling roller unit and after the upper and lower driving roller units for guiding the material film to move. The device has simple structure, small space occupation and can realize quick switching of products with different thicknesses in the production process. The stripping method comprises the following steps: after the material film passes through the cooling roller unit, the material film is stripped under the joint action of the upper and lower driving roller units; the ultrasonic probe unit detects the distance between the material film pulled by the lower driving roller unit and the ultrasonic probe unit to determine the stripping angle and the stripping force; and the tension control precision of the functional layer and the base release layer after stripping is improved through the ultrasonic ranging mode, and the accurate control of the stripping angle and the stripping force is realized.

Description

TECHNICAL FIELD

[0001] The present application belongs to the technical field of coating product stripping equipment, and particularly relates to a pressure roller-free stripping device for polyurethane foam products and a pressure roller-free stripping method for polyurethane foam products. BACKGROUND

[0002] The traditional stripping method of product carriers in the coating industry generally adopts the form of stripping pressure roller assisted stripping, which is structured such that the material film is wrapped on a back roller, and another pressure roller is used to press the material film, and the functional layer and the base release layer are stripped away when the material film leaves the two rollers. However, because the pressure roller exists, the tension is blocked, and therefore the functional layer and the base release layer after stripping need to be controlled in tension, which requires that the two sections of the material film be long enough to ensure that the tension detection system and the tension control system can be arranged. However, if the two sections of the material film are too long, the control of the stripping effect will be weakened, and the stripping angle and the stripping force cannot be well controlled. At the same time, because the tension is blocked by the pressure roller during stripping, the speed synchronization of the functional layer and the base release layer after stripping is required to be very high. If the advancing speeds of the two sections of the material film are not synchronized, the stripping angle will change, and the tension of the two sections of the material film will affect each other, and the tension cannot be controlled. Moreover, because of the existence of the stripping pressure roller, only a single thickness of product can be produced under the same working condition, and different thicknesses of products cannot be quickly switched. When different thicknesses of products are produced, the pressure roller gap adjusting device needs to be adjusted. SUMMARY

[0003] The purpose of the present application is to provide a pressure roller-free stripping device for polyurethane foam products, which can accurately control the stripping angle and the stripping force without being affected by the change in the thickness of the material film.

[0004] Another purpose of the present application is to provide a pressure roller-free stripping method for polyurethane foam products.

[0005] The first technical solution adopted by the present application is a pressure roller-free stripping device for polyurethane foam products, which comprises a rack, a cooling roller unit connected to the rack, an upper driven roller unit connected to the rack above the cooling roller unit, a lower driven roller unit connected to the rack below the cooling roller unit, an ultrasonic probe unit connected to the rack between the upper and lower driven roller units, and a guide roller unit connected to the rack before the cooling roller unit and after the upper and lower driven roller units, for guiding and controlling the movement of the material film.

[0006] The present application is also characterized in that,

[0007] The cooling roller unit comprises a cooling roller, a rotary joint and a cooling water pipe, the cooling water pipe is connected with the cooling roller through the rotary joint, cooling water is pressurized from a cooling water source and passes through the cooling water pipe, enters the cooling roller from the rotary joint, and cools the material film wrapped on the cooling roller, so that the material film is easily peeled off.

[0008] The upper driving roller unit comprises a driving motor, the driving motor is connected with the rack, a chain wheel is connected with the output end of the driving motor, two driving rollers are driven through a chain, the two driving rollers are connected with the rack, and the relative positions are in an S shape.

[0009] The lower driving roller unit comprises a driving motor, the driving motor is connected with the rack, a chain wheel is connected with the output end of the driving motor, two driving rollers are driven through a chain, the two driving rollers are connected with the rack, and the relative positions are in an S shape.

[0010] The ultrasonic probe unit comprises an ultrasonic probe, the probe is installed on an ultrasonic probe support, and the support is connected with the rack.

[0011] Another technical scheme adopted by the present application is a pressure roller type peeling method for polyurethane foam products,

[0012] Step 1: heat curing of the glue liquid above the material film in the heating area before peeling off the material film, and then entering the peeling device;

[0013] Step 2: the material film is peeled off under the joint action of the upper driving roller unit and the lower driving roller unit after passing through the cooling roller unit, and the peeling point is the detection position of the ultrasonic probe unit;

[0014] The ultrasonic probe unit detects the distance between the material film pulled by the lower driving roller unit and the ultrasonic probe unit, to determine the peeling angle and the peeling force;

[0015] When the distance between the ultrasonic probe unit and the material film becomes larger, it indicates that the speed of the lower driving roller unit is too fast, resulting in too small peeling angle and too large peeling force; when the distance between the ultrasonic probe unit and the material film becomes smaller, it indicates that the speed of the lower driving roller unit is too slow, resulting in too large peeling angle and too small peeling force, and the rotation speed of the lower driving roller unit is continuously adjusted to realize accurate control of the peeling process.

[0016] The key innovation point of the present application is:

[0017] First, when peeling in the past using a peeling pressure roller, the film tension is blocked due to the presence of the pressure roller, which leads to the tension between the functional layer and the substrate release layer after peeling affecting each other from the pressure roller pressing point. When the tension of one side of the film increases, the tension of the other side of the film will inevitably decrease. The present application cancels the peeling pressure roller through ultrasonic ranging, so there is no tension blocking effect. When the tension of one side of the film increases, the tension of the other side of the film does not change. The change is the position of the peeling point and the angle between the functional layer and the substrate release layer. The ultrasonic ranging can accurately find this situation in time, and then the speed of the film can be adjusted by adjusting the speed of the upper and lower driven roller units, thereby adjusting the tension of the two films and improving the control precision of the film tension.

[0018] Second, due to the presence of the peeling pressure roller in the common structure on the market, only single thickness products can be produced under the same working condition, and different thickness products cannot be quickly switched. When producing products of different thicknesses, the pressure roller gap adjusting device needs to be adjusted. The device structure of the present application can realize the peeling of products of different thicknesses without the need to adjust the equipment to achieve precise peeling.

[0019] The beneficial effects of the present application are:

[0020] The present application is a pressure roller-free peeling device for polyurethane foam products, which cancels the traditional peeling pressure roller device and simplifies the overall structure of the device. The upper and lower S-orientation roller shaft transmission does not require too much space and can achieve quick switching of products of different thicknesses during production, avoiding the impact of different film thicknesses on production continuity. Through ultrasonic ranging, the precision of the tension control of the functional layer and the substrate release layer after peeling is improved, the peeling angle and the size of the peeling force are accurately controlled, and the product quality is guaranteed. BRIEF DESCRIPTION OF DRAWINGS

[0021] Fig. 1 is a structure diagram of a pressure roller-free peeling device for polyurethane foam products of the present application;

[0022] Fig. 2 is a side view of a pressure roller-free peeling device for polyurethane foam products of the present application;

[0023] In the figure, 1. Cooling roller unit; 2. Upper driven roller unit; 3. Lower driven roller unit; 4. Guide roller unit; 5. Ultrasonic probe unit; 6. Machine frame; 7. Drive motor; 8. Sprocket; 9. Chain. DETAILED DESCRIPTION

[0024] The present application will be described in detail below in combination with the drawings and specific embodiments.

[0025] Example 1

[0026] The application provides a pressure-free roller type peeling device for polyurethane foam, which has the structure as shown in the drawings. Figs. 1-2 The device comprises a rack 6, a cooling roller unit 1 connected to the rack 6, an upper driving roller unit 2 connected to the rack above the cooling roller unit 1, a lower driving roller unit 3 connected to the rack below the cooling roller unit 1, an ultrasonic probe unit 5 connected to the rack 6 between the upper driving roller unit 2 and the lower driving roller unit 3, and guide roller units 4 connected to the rack 6 before the cooling roller unit 1 and after the upper driving roller unit 2 and the lower driving roller unit 3, which are used for guiding and controlling the movement of the material film.

[0027] The upper driving roller unit 2 comprises a driving motor 7 connected to the rack 6, a chain wheel 8 connected to the output end of the driving motor 7, and a chain 9 connected to the chain wheel 8, which drives two driving rollers connected to the rack 6 and arranged in an S-shaped relative position.

[0028] The lower driving roller unit 3 has the same structure as the upper driving roller unit 2.

[0029] The ultrasonic probe unit 5 measures the distance between the probe and the material film to determine the peeling angle and the peeling force, and then determines the direction required for subsequent adjustment.

[0030] The cooling roller unit 1 is used for cooling the material film, because the product is heated and solidified in the heating area before entering the device, and the temperature of the product needs to be reduced to obtain better peeling effect; the upper driving roller unit 2 is used for pulling the main product after peeling through the S-shaped large wrap angle material movement mode, guiding the main product to move forward and enter the next process; the lower driving roller unit 3 is used for pulling the protective film after peeling through the S-shaped large wrap angle material movement mode, guiding the protective film to move forward and enter the winding process; the guide roller unit 4 is used for assisting to determine the wrap angle between the material film and each roller and assisting the smooth movement of the material film; the ultrasonic probe unit 5 is used for measuring the distance between the peeled protective film and the probe; and the rack 6 is used for installing and fixing the above-mentioned components in the correct position.

[0031] Example 2

[0032] The pressureless roller type peeling method of the polyurethane foam product of the present application is as follows: after the material film is cured after passing through the heating zone, it enters the peeling device, is cooled by the cooling roller unit 1, and is peeled under the joint action of the upper and lower driven roller units 2 and 3 after passing through the cooling roller unit 1. The peeling point is at the detection position of the ultrasonic probe unit 5. The distance between the material film pulled by the lower driven roller unit 3 and the ultrasonic probe unit 5 is detected by the ultrasonic probe unit 5 to determine the peeling angle and the peeling force. When the distance between the ultrasonic probe unit 5 and the material film becomes larger, it means that the speed of the lower driven roller unit 3 is too fast, resulting in too small peeling angle and too large peeling force. When the distance between the ultrasonic probe unit 5 and the material film becomes smaller, it means that the speed of the lower driven roller unit 3 is too slow, resulting in too large peeling angle and too small peeling force. By continuously adjusting the rotation speed of the lower driven roller unit 3, the peeling process can be accurately controlled to ensure product quality.

[0033] When the ultrasonic probe detects that the distance between the material film becomes smaller, the rotation speed of the upper driven roller is reduced and the rotation speed of the lower driven roller is increased. The rotation speed of the upper driven roller is reduced from 300 r / min to 280 r / min, and the rotation speed of the lower driven roller is increased from 300 r / min to 320 r / min. When the ultrasonic probe detects that the distance between the material film becomes longer, the rotation speed of the upper driven roller is increased and the rotation speed of the lower driven roller is reduced. The rotation speed of the upper driven roller is increased from 300 r / min to 320 r / min, and the rotation speed of the lower driven roller is reduced from 300 r / min to 280 r / min.

[0034] Example 3

[0035] The peeling force of a general commonly used product is about 20 g. Taking this as an example, when the peeling force of the product fluctuates, assuming that the fluctuation range is 3 g, when the peeling force becomes 23 g, the ultrasonic probe detects that the distance between the material film becomes shorter, and then the rotation speed of the upper driven roller is reduced and the rotation speed of the lower driven roller is increased. The motor speed is maintained at 300 r / min in the general working state. In the above case, the rotation speed of the upper driven roller is reduced to 280 r / min and the rotation speed of the lower driven roller is increased to 320 r / min. When the peeling force becomes 17 g, the ultrasonic probe detects that the distance between the material film becomes longer, and then the rotation speed of the upper driven roller is increased and the rotation speed of the lower driven roller is reduced. The motor speed is maintained at 300 r / min in the general working state. In the above case, the rotation speed of the upper driven roller is increased to 320 r / min and the rotation speed of the lower driven roller is reduced to 280 r / min.

Claims

1. A pressureless roll peeling device for polyurethane foam products, characterized in that, The application relates to a polyurethane foam product pressureless roller stripping device, which comprises a rack (6), a cooling roller unit (1) connected to the rack (6), an upper driving roller unit (2) above the cooling roller unit (1) and a lower driving roller unit (3) below the cooling roller unit (1); an ultrasonic probe unit (5) is arranged on the rack (6) and located between the upper driving roller unit (2) and the lower driving roller unit (3); guide roller units (4) are arranged before the cooling roller unit (1) and after the upper driving roller unit (2) and the lower driving roller unit (3) respectively, and the guide roller units (4) are used for guiding and controlling the material film movement direction. The upper driving roller unit (2) comprises a driving motor (7) connected to the rack (6), a chain wheel (8) connected to the output end of the driving motor (7), and a chain (9) connected to the chain wheel (8) and used for driving two driving rollers connected to the rack (6) and arranged in an S-shaped relative position. The lower driving roller unit (3) has the same structure as the upper driving roller unit (2). The ultrasonic probe unit (5) measures the distance between the probe and the material film to determine the peeling angle and the peeling force, and then determines the required adjustment direction, and the peeling point is the detection position of the ultrasonic probe unit.

2. A pressureless roll debonding method for polyurethane foam products, characterized by, The polyurethane foam product pressureless roller stripping device is used in the following specific operation steps: Step 1: before peeling the material film, the glue liquid above the material film is heat-cured in a heating area, and then the material film enters the stripping device; Step 2: after the material film passes through the cooling roller unit, the material film is peeled under the joint action of the upper driving roller unit and the lower driving roller unit, and the peeling point is the detection position of the ultrasonic probe unit; The ultrasonic probe unit measures the distance between the material film pulled by the lower driving roller unit and the ultrasonic probe unit to determine the peeling angle and the peeling force; When the distance between the ultrasonic probe unit and the material film becomes larger, it indicates that the speed of the lower driving roller unit is too fast, resulting in that the peeling angle is too small and the peeling force is too large; when the distance between the ultrasonic probe unit and the material film becomes smaller, it indicates that the speed of the lower driving roller unit is too slow, resulting in that the peeling angle is too large and the peeling force is too small; the rotation speed of the lower driving roller unit is continuously adjusted to realize accurate control of the peeling process; When the ultrasonic probe detects that the distance between the material film becomes smaller, the rotation speed of the upper driving roller is reduced and the rotation speed of the lower driving roller is increased, the rotation speed of the upper driving roller is reduced from 300 r / min to 280 r / min, and the rotation speed of the lower driving roller is increased from 300 r / min to 320 r / min; When the ultrasonic probe detects that the distance between the material film becomes larger, the rotation speed of the upper driving roller is increased and the rotation speed of the lower driving roller is reduced, the rotation speed of the upper driving roller is increased from 300 r / min to 320 r / min, and the rotation speed of the lower driving roller is reduced from 300 r / min to 280 r / min.

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