TWI753331B - Fabrication apparatus and manufacturing method of plastic film - Google Patents

Abstract

A fabrication apparatus of plastic film including an extrusion element, a gear pump, a cooling roller, a winding roller, and a detector group is provided. The extrusion element has an inlet and an outlet, and the plastic film is extruded from the outlet. The gear pump is disposed adjacent to the inlet and is configured to control throughput of the extrusion element. The cooling roller is disposed adjacent to the outlet, and an air gap distance is remained between the cooling roller and the outlet. The cooling roller is configured to control the extruding speed of the extrusion element and define a conveying direction. The winding roller is disposed behind the cooling roller in the conveying direction and collects the cooled plastic film. The detector group is disposed between the cooling roller and the winding roller, and the detector group includes thickness detector and width detector. A manufacturing method is also provided.

Description

Manufacturing device and manufacturing method of plastic film

The invention relates to a manufacturing device and a manufacturing method of a plastic film.

Plastic films have now been widely used in various fields such as packaging, plastic bags, labels, construction, electronic components and clothing, and the thickness and width of plastic films also vary with different fields and needs.

During the production process, after a long period of repeated testing of different production parameters, the operator can produce a plastic film with the expected thickness and width. On the whole, operators need long-term accumulation of experience to set correct production parameters more efficiently, and the accumulated experience of operators is often difficult to pass on. Therefore, how to more efficiently set and record the production parameters to accurately produce the desired plastic film is a problem to be solved in the art.

An embodiment of the present disclosure provides an apparatus for manufacturing a plastic film, which includes an extrusion element, a gear pump, a cooling roller, Winding roller and detection element group. The extruding element has a feeding end and a discharging end, and the plastic film is provided from the discharging end. The gear pump is arranged adjacent to the feed end and is used to control the feed rate of the extruder element. The cooling roller is arranged adjacent to the discharge end, and the cooling roller and the discharge end are separated by an air gap distance. Chilled rollers are used to control the extrusion rate of the film extrusion element and provide the conveying direction. The take-up roller is arranged behind the cooling roller along the conveying direction, and the take-up roller is used to collect the cooled plastic film. The detection element group is arranged between the cooling roller and the take-up roller along the conveying direction, and the detection element group has a thickness detection element and a width detection element.

In some embodiments, the manufacturing apparatus of the plastic film further includes a positioning element, which is disposed on the cooling roller or on the discharge end.

In some embodiments, the manufacturing apparatus of the plastic film further includes a positioning control device, which is connected to the cooling roller or the discharge end. The positioning control device is used to control the air gap distance between the cooling roller and the discharge end.

An embodiment of the present disclosure provides a method for manufacturing a plastic film, which includes the following steps. Provides manufacturing equipment for plastic films. Input the product parameters to the prediction model and output the process parameters, wherein the product parameters include the material, thickness and width of the plastic film, and the process parameters include the speed of the gear pump and the air gap distance. And, adjust the speed of the gear pump and the air gap distance according to the process parameters.

In some embodiments, the process parameters include the operating temperature of the extruding element and the stretch ratio of the plastic film, and the stretch ratio is the ratio of the rotational speed of the winding roller to the rotational speed of the cooling roller.

In some embodiments, the manufacturing method of the plastic film further includes a step of normalizing the process parameters to obtain the normalized operating temperature, the normalized rotational speed of the gear pump, the normalized air gap distance, and the normalized stretching ratio.

In some embodiments, the normalizing step includes the following steps. Rescale the operating temperature from 0 to 1 to get the normalized operating temperature. Rescale the gear pump speed from 0 to 1 to get the normalized gear pump speed. Rescale the air gap distance from 0 to 1 to get the normalized air gap distance. And, rescale the stretch ratio from 0 to 1 to get a normalized stretch ratio.

In some embodiments, the step of inputting the product parameters into the prediction model and outputting the process parameters further includes obtaining the process parameters with the following first equation and second equation: The first equation: Y ₁ =K ₁ +A ₁ ×Z ₁ +B ₁ × Z ₂ +C ₁ ×Z ₃ +D ₁ ×Z ₄ ; and the second equation: Y ₂ =K ₂ +A ₂ ×Z ₁ +B ₂ ×Z ₂ +C ₂ ×Z ₃ +D ₂ ×Z ₄ , where Y ₁ is the thickness of the plastic film, Y ₂ is the width of the plastic film, K ₁ is a constant of -0.91~0.74, K ₂ is a constant of 0.12~0.18, A ₁ is a constant of -0.52~-0.23, A ₂ is a constant of -0.08~0.15, B1 is _a constant of -0.42~0.69, B2 is a constant of 0.17~0.41, _C1 is a constant of -0.61~0.37, _C2 is _a constant of _-0.09 ~0.13, D1 is a constant of _-0.38 ~1.17, D2 is _a constant of -0.14~0.05, Z1 is the normalized operating temperature, _Z2 is the normalized gear pump speed, _Z3 is the normalized air gap distance, and _Z4 is the normalized stretch ratio.

In some embodiments, when the material of the plastic film is thermoplastic polyester elastomer (TPEE), K ₁ is a constant of -0.91 to -0.75, K ₂ is a constant of 0.15 to 0.18, and A ₁ is - _A constant of 0.52~-0.42, A2 is a constant of 0.12~0.15, B1 is _a constant of 0.56~0.69, B2 is a constant of 0.33~0.41, _C1 is a constant of -0.61~-0.50, and _C2 is a constant of _-0.09 A constant of ~-0.07, D ₁ is a constant of 0.96 to 1.17, and D ₂ is a constant of 0.04 to 0.05.

In some embodiments, when the plastic film is made of thermoplastic polyurethanes (TPU), K ₁ is a constant of 0.60-0.74, K ₂ is a constant of 0.12-0.15, and A ₁ is a constant of -0.29--0.23 , A2 is a constant of _-0.08 ~-0.06, B1 is _a constant of -0.42~-0.35, B2 is a constant of 0.17~0.20, _C1 is a constant of 0.31~ _0.37 , _C2 is a constant of 0.11~0.13, D ₁ is a constant of -0.38 to -0.31, and D ₂ is a constant of -0.14 to -0.12.

d1‧‧‧Conveying direction

g1‧‧‧Air gap distance

Steps S11, S12, S13, S14, S15, S16‧‧‧

100, 100A‧‧‧Manufacturing equipment

101‧‧‧Plastic film

102, 103‧‧‧Guide roller

110‧‧‧Extrusion components

111‧‧‧Feed end

112‧‧‧Discharge end

120‧‧‧Gear pump

121‧‧‧Infeed chute

130‧‧‧Cooling roller

131‧‧‧Drive Components

132‧‧‧Positioning control device

133‧‧‧Locating element

140‧‧‧winding roller

141‧‧‧Drive Components

150‧‧‧Detection element group

151, 152‧‧‧Width detection element

153, 154, 155‧‧‧Thickness detection element

160‧‧‧Control Components

170‧‧‧Input Components

FIG. 1 is a block diagram illustrating a manufacturing apparatus of a plastic film according to an embodiment of the present disclosure;

FIG. 2 is a three-dimensional schematic diagram illustrating a manufacturing apparatus of a plastic film according to an embodiment of the present disclosure;

FIG. 3 is a three-dimensional schematic diagram illustrating a manufacturing apparatus of a plastic film according to another embodiment of the present disclosure;

FIG. 4 is a schematic flowchart of a method for manufacturing a plastic film according to an embodiment of the present disclosure;

FIG. 5 is a schematic flowchart of a method for manufacturing a plastic film according to another embodiment of the present disclosure.

The following examples are described in detail with the accompanying drawings, but the provided examples are not intended to limit the scope covered by the present disclosure, and the descriptions of structures and operations are not intended to limit the order of their execution. Combination of The structure and the resulting device with equal efficacy are all within the scope of the present disclosure. In addition, the drawings are for illustrative purposes only and are not drawn in full scale. For ease of understanding, the same elements in the following description will be denoted by the same symbols.

Please refer to FIG. 1 . FIG. 1 illustrates a block diagram of an apparatus 100 for manufacturing a plastic film according to an embodiment of the present disclosure. The manufacturing apparatus 100 includes a gear pump 120 , a cooling roller 130 , a winding roller 140 , and a detection element group 150 , and the detection element group 150 includes width detection elements 151 , 152 and thickness detection elements 153 , 154 , 155 .

For example, the manufacturing apparatus 100 of this embodiment may further include a control element 160 electrically connected to the gear pump 120 , the cooling roller 130 , the winding roller 140 and the detection element group 150 . The control element 160 controls the rotational speed of the gear pump 120 , the rotational speed of the cooling roller 130 and the rotational speed of the winding roller 140 , and obtains detection data from the width detection elements 151 , 152 and the thickness detection elements 153 , 154 , 155 of the detection element group 150 .

The manufacturing apparatus 100 may also include an input element 170 that is electrically connected to the control element 160 . For example, the input element 170 may include a mouse, a keyboard, an external hard disk or a flash drive, or may be a touch module integrally formed with the control element 160 , but the disclosure is not limited thereto. The input element 170 is used to input product parameters to the control element 160 . In other embodiments of the present disclosure, the product parameters may also be directly stored in the control element 160, but the present disclosure is not limited thereto.

For example, the product parameters input to the control element 160 may include the material, thickness and width of the plastic film, and the control element 160 stores the The prediction model can take product parameters as input and output process parameters to control the gear pump 120 , the cooling roller 130 , the winding roller 140 and the detection element group 150 , thereby providing an automated method for producing plastic films.

Please refer to FIG. 2 . FIG. 2 is a schematic diagram of a manufacturing apparatus 100 of a plastic film according to the present embodiment. The manufacturing apparatus 100 includes an extruding element 110 , a gear pump 120 , a cooling roller 130 , a winding roller 140 and a detection element group 150 .

The extruding element 110 has a feeding end 111 and a discharging end 112 , and the plastic film 101 is provided from the discharging end 112 . The gear pump 120 is disposed adjacent to the feeding end 111 for controlling the feeding rate of the extruding element 110 .

For example, the manufacturing apparatus 100 may further include a feeding chute 121 for placing the raw material of the plastic film 101 . The raw material may include thermoplastic polyester elastomer (TPEE) or thermoplastic polyurethane (TPU), to which the present disclosure is not limited. The gear pump 120 is connected between the feed chute 121 and the feed end 111 of the extruding element 110 , so the gear pump 120 can control the feed rate of the raw material from the feed chute 121 to the feed end 111 .

The discharge end 112 of the extruding element 110 may have an elongated opening, so the molten raw material can be extruded into the plastic film 101 through the discharge end 112 .

The cooling roller 130 is disposed adjacent to the discharge end 112 of the extruding element 110 for receiving and cooling the plastic film 101 from the extruding element 110 . There is an air gap distance g1 between the cooling roller 130 and the discharge end 112 , and the air gap distance g1 is substantially the distance that the plastic film 101 moves from the discharge end 112 of the extrusion element 110 to the cooling roller 130 .

On the other hand, the cooling roller 130 can control the extrusion rate of the film extrusion element 110 and determine the conveying direction d1. For example, chill roll 130 The extrusion rate of the plastic film 101 from the extrusion element 110 can be driven by rolling, and the conveying direction d1 of the plastic film 101 is also determined by the rolling direction.

The take-up roller 140 is arranged after the cooling roller 130 along the conveyance direction d1. The take-up roller 140 is used for collecting the plastic film 101 cooled by the cooling roller 130 .

For example, the manufacturing apparatus 100 may further include guide rollers 102 and 103, and these guide rollers 102 and 103 are arranged between the cooling roller 130 and the winding roller 140 along the conveying direction d1. These guide rollers 102 and 103 can maintain the plastic film 101 at an appropriate height, and also allow the plastic film 101 to stretch along the conveying direction d1 between the cooling roller 130 and the take-up roller 140 .

The detection element group 150 is disposed between the cooling roller 130 and the take-up roller 140 along the conveying direction d1 , and the detection element group 150 has thickness detection elements 153 , 154 , 155 distributed above the plastic film 101 and located on the plastic film 101 . The width detection elements 151 and 152 on both sides.

For example, the thickness detection elements 153 , 154 , and 155 can be respectively spaced along the direction perpendicular to the conveying direction d1 to measure distances, and the measurement distances can fall within the range of 50 cm to 150 cm, so as to be used in different positions of the plastic film 101 The thickness is detected to detect whether the thickness standard deviation of each position on the plastic film 101 is too large. The width detection elements 151, 152 and the thickness detection elements 153, 154, 155 may each include laser displacement sensors, but the present disclosure is not limited thereto.

Therefore, the manufacturing apparatus 100 of the present embodiment can monitor the thickness and width of the plastic film 101 through the detection element set 150 , and then cooperate with the extrusion element 110 , the gear pump 120 , the cooling roller 130 and the winding roller 140 to automatically manufacture A plastic film 101 that meets the width and thickness requirements is produced.

As described above, the control element 160 of the manufacturing apparatus 100 may be electrically connected to the gear pump 120 , the cooling roller 130 , the winding roller 140 and the detection element group 150 . For example, the control element 160 can be a touch-sensitive computer, which can store a prediction model to output process parameters according to product parameters, and the process parameters include the rotational speed of the gear pump 120 and the air gap distance g1 . Therefore, when the user inputs the product parameters to the control element 160, the user can adjust the position of the cooling roller 130 according to the air gap distance g1 displayed by the control element 160, and then let the control element 160 drive the gear at the rotational speed of the gear pump output by the predicted model Pump 120 .

Further, the process parameters may also include the operating temperature of the extrusion element 110 and the stretching ratio of the plastic film 101 . The operating temperature of the extrusion element 110 may be the temperature at which the molten raw material is extruded from the discharge end 112 of the extrusion element 110 . The draw ratio is the ratio of the rotational speed of the winding roller 140 to the rotational speed of the cooling roller 130 . The control element 160 can control the rotational speed of the cooling roller 130 and the rotational speed of the winding roller 140 according to the drawing ratio in the process parameters output by the prediction model, and adjust the rotational speed of the winding roller 140 and the cooling roller 130 by adjusting the rotational speed of the winding roller 140 and the cooling roller 130 . The difference between the rotational speeds is used to adjust the stretching of the plastic film 101 on the guide rollers 102 and 103 .

For example, the manufacturing apparatus 100 may include a driving element 131 and a driving element 141 , and the driving element 131 is connected to and drives the cooling roller 130 , and the driving element 141 is connected to and drives the winding roller 140 . The control element 160 can be electrically connected to the driving element 131 to control the rotational speed of the cooling roller 130 , and can be electrically connected to the driving element 141 to control the rotational speed of the take-up roller 140 .

On the other hand, the detection element group 150 can detect the thickness and width of the plastic film 101 , and the control element 160 can also detect the thickness and width of the plastic film 101 according to the detection element group 150 . The thickness and width of the plastic film 101 are compared between the inspection data obtained and the product parameters, so as to further ensure the yield of the plastic film 101 .

Since the control element 160 is electrically connected to the gear pump 120 , during the production process of the plastic film 101 , the manufacturing apparatus 100 can adjust the rotational speed of the gear pump 120 in real time according to the detection result of the detection element group 150 , so as to accurately maintain the target thickness and thickness of the elastic film. width.

Please refer to FIG. 3 . FIG. 3 is a schematic diagram of a manufacturing apparatus 100A of a plastic film according to the present embodiment. The manufacturing apparatus 100A is similar to the manufacturing apparatus 100 of the above-mentioned embodiment, which includes an extruding element 110, a gear pump 120, a cooling roller 130, a winding roller 140, and a detection element group 150, and the same elements and their detailed descriptions are omitted here. Repeat. The manufacturing apparatus 100A further includes a positioning element 133 disposed at the discharge end 112 of the extruding element 110 . The positioning element 133 is used to measure the air gap distance g1 between the discharge end 112 and the cooling roller 130 , so that the manufacturing apparatus 100A can more accurately adjust the cooling roller 130 according to the air gap distance g1 provided by the control element 160 .

It should be noted that the positioning element 133 in this embodiment is not limited to measuring the air gap distance g1 directly. In other embodiments, the positioning element 133 can measure other positions of the cooling roller 130 on the discharge end 112 . Measure, and then calculate the corresponding air gap distance g1. On the other hand, in other embodiments, the positioning element 133 may also be disposed on the cooling roller 130 and measure the air gap distance g1 at the discharge end 112 .

The manufacturing apparatus 100A further includes a positioning control device 132 connected to the cooling roll 130 . The positioning control device 132 is used to control the air gap distance g1 between the cooling roller 130 and the discharge end 112 . For example, the positioning control device 132 A hydraulic device may be included to adjust the position of the rotating shaft of the cooling roller 130, thereby adjusting the air gap distance g1. In other embodiments, the positioning control device 132 can also be disposed at the discharge end 112 , and the air gap distance g1 can be adjusted by moving the discharge end 112 .

The control element 160 is electrically connected to the positioning control device 132 and the positioning element 133 , and the prediction model of the control element 160 can output process parameters according to product parameters, and the process parameters include the air gap distance g1 . Therefore, after the user inputs the product parameters to the control element 160, the control element 160 can automatically adjust the position of the cooling roller 130 according to the air gap distance g1 output by the prediction model, and then allow the control element 160 to drive the gear pump at the rotational speed of the gear pump output by the prediction model. Gear pump 120 . Meanwhile, the positioning element 133 can monitor and adjust the air gap distance g1 during the manufacturing process of the plastic film 101 , so as to accurately maintain the target thickness and width of the elastic film.

Please refer to FIG. 4 . FIG. 4 shows a schematic flowchart of a method for manufacturing a plastic film according to the present embodiment. The manufacturing method of this embodiment includes the following steps. A manufacturing apparatus of a plastic film is provided (step S11 ). Input product parameters to the prediction model and output process parameters (step S12 ), wherein the product parameters include the material, thickness and width of the plastic film, and the process parameters include gear pump speed and air gap distance. And, adjust the rotational speed of the gear pump and the air gap distance according to the process parameters (step S13 ).

The manufacturing apparatus provided in step S11 may be, for example, the manufacturing apparatus 100 of the above-mentioned embodiment. Hereinafter, the reference numerals in Fig. 2 are also referred to. As mentioned above, the process parameters may also include the operating temperature of the extrusion element 110 and the stretching ratio of the plastic film 101 , and the stretching ratio is the ratio of the rotation speed of the winding roller 140 to the rotation speed of the cooling roller 130 .

Since the prediction model can directly output the appropriate Therefore, the manufacturing method of this embodiment can effectively manufacture plastic films with appropriate thickness and width from various materials.

On the other hand, the detection element group 150 of the manufacturing apparatus 100 can further detect the thickness and width of the plastic film 101 manufactured by the manufacturing apparatus 100 according to the process parameters, and further train the prediction model.

Please refer to FIG. 5. FIG. 5 is a schematic flowchart of a method for manufacturing a plastic film according to another embodiment of the present disclosure. The manufacturing method of this embodiment is similar to the manufacturing method of the above-mentioned embodiment with reference to FIG. 4 , and the same steps are not repeated here. The manufacturing method of this embodiment further includes the following steps after adjusting the rotational speed of the gear pump and the air gap distance according to the process parameters (step S13 ). Measure the thickness and width of the plastic film produced with the process parameters (step S14 ). A normalization step is performed on the process parameters (step S15). The first equation and the second equation of the prediction model are trained by machine learning based on the measured thickness and width of the plastic film and the normalized process parameters (step S16 ).

For example, the step 12 of inputting the product parameters into the prediction model and outputting the process parameters further includes formulating the first equation: Y ₁ =K ₁ +A ₁ ×Z ₁ +B ₁ ×Z ₂ +C ₁ ×Z ₃ +D ₁ ×Z ₄ ; and the second equation: Y ₂ =K ₂ +A ₂ ×Z ₁ +B ₂ ×Z ₂ +C ₂ ×Z ₃ +D ₂ ×Z ₄ to obtain process parameters. Product parameters include Y ₁ and Y ₂ , where Y ₁ is the thickness of the plastic film, and Y ₂ is the width of the plastic film. The process parameters include Z ₁ ~Z ₄ , where Z ₁ is the normalized operating temperature, Z ₂ is the normalized gear pump speed, Z ₃ is the normalized air gap distance, and Z ₄ is the normalized draw ratio. In the first equation, K ₁ is a constant from -0.91 to 0.74, A ₁ is a constant from -0.52 to -0.23, B ₁ is a constant from -0.42 to 0.69, C ₁ is a constant from -0.61 to 0.37, and D ₁ is a constant from -0.61 to 0.37. -0.38~1.17 constant. In the _second equation, K2 is a constant of 0.12~0.18, A2 is a constant of _-0.08 ~0.15, B2 is a constant of 0.17~0.41, _C2 is a constant of _-0.09 ~0.13, and D2 is a constant of _-0.14 ~ A constant of 0.05.

In the step of normalizing the process parameters (step S15), the manufacturing method of this embodiment obtains the normalized operating temperature, the normalized gear pump rotational speed, the normalized air gap distance, and the normalized stretch ratio through the normalization step, In order to facilitate the training of the prediction model (step S16 ), the values of the first equation and the second equation of the training prediction model can fall within an appropriate range, which is more conducive to machine learning training of the prediction model.

In detail, the normalization step includes the following steps. Rescale the operating temperature from 0 to 1 to get the normalized operating temperature. Rescale the gear pump speed from 0 to 1 to get the normalized gear pump speed. Rescale the air gap distance from 0 to 1 to get the normalized air gap distance. And, rescale the stretch ratio from 0 to 1 to get a normalized stretch ratio. In some embodiments, the rescaled calculation formula is, for example: X _norm =(XX _min )/(X _max -X _min ), where X _norm is the value after normalization, X is the experimental value before normalization, X _max is the maximum experimental value before normalization, and X _min is the minimum experimental value before normalization.

For example, the gear pump speed was originally a value ranging from 1 to 6 revolutions per minute, the normalization step rescales the value from 1 to 6 to a value from 0 to 1 to obtain the normalized gear pump speed . The air gap distance was originally a value in the range of 0.5 cm to 2.5 cm. The normalization step rescales the value in the range of 0.5 to 2.5 to a value in the range of 0 to 1 to obtain the normalized air gap distance. The stretch ratio was originally a value in the range of 30 to 70, and the normalization step rescaled it to a value in the range of 0 to 1 to get the normalized stretch ratio.

When the material is thermoplastic polyester elastomer (TPEE), operation The temperature is originally a value in the range of 200 to 230 degrees Celsius, and the normalization step rescales the value in the range of 200 to 300 to a value in the range of 0 to 1 to obtain the normalized operating temperature. When the material is thermoplastic polyurethane (TPU), the operating temperature was originally a value falling between 170°C and 200°C. The normalization step rescales the value falling between 170 and 200 to a value falling between 0 and 1 to obtain Normalized operating temperature.

On the other hand, when the product parameters are input into the prediction model and the process parameters are output (step 12), the output process parameters may also include normalized operating temperature, normalized gear pump speed, normalized air gap distance, and normalized stretch ratio , these process parameters output by the prediction model can be adjusted to the actual operating temperature, gear pump speed, air gap distance and draw ratio according to the scaling range in the above-mentioned normalization step.

On the other hand, in this embodiment, when the plastic film is produced by the process parameters output by the prediction model, the width and thickness of the actually produced plastic film and the product parameters corresponding to the process parameters can further train the prediction model. When the actual width and thickness of the plastic film are different from product parameters, the manufacturing method of this embodiment can retrain the prediction model through step S16, so that the trained prediction model can provide more accurate process parameters.

On the other hand, since the process parameters include the material of the plastic film, the first equation and the second equation in the prediction model can be further adjusted for different materials.

For example, in other embodiments of the present disclosure, when the material of the plastic film is thermoplastic polyester elastomer (TPEE), in the first equation and the second equation of the prediction model, K ₁ is -0.91~-0.75 K ₂ is a constant of 0.15~0.18, such as 0.162; A ₁ is a constant of -0.52~-0.42, such as -0.471; A ₂ is a constant of 0.12~0.15, such as 0.135; B ₁ is a constant ranging from 0.56 to 0.69, such as 0.627; B ₂ is a constant ranging from 0.33 to 0.41, such as 0.37; C ₁ is a constant ranging from -0.61 to -0.50, such as -0.55; C ₂ is -0.09 to -0.07 D ₁ is a constant of 0.96-1.17, such as 1.063; and D ₂ is a constant of 0.04-0.05, such as 0.044.

On the other hand, when the material of the plastic film is thermoplastic polyurethane (TPU), in the first equation and the second equation of the prediction model, K ₁ is a constant of 0.60~0.74, such as 0.671; K ₂ is 0.12~0.15 A constant, such as 0.132; A ₁ is a constant of -0.29~-0.23, such as -0.26; A ₂ is a constant of -0.08~-0.06, such as -0.069; B ₁ is a constant of -0.42~-0.35, such as is -0.386; B ₂ is a constant of 0.17~0.20, such as 0.185; C ₁ is a constant of 0.31~0.37, such as 0.34; C ₂ is a constant of 0.11~0.13, such as 0.117; D ₁ is -0.38~- A constant of 0.31 is, for example, -0.342; and D ₂ is a constant of -0.14 to -0.12, for example, -0.128.

Therefore, the prediction model can not only provide process parameters based on the input product parameters, but also select the parameters in the first equation and the second equation according to the plastic film material in the product parameters, so as to provide more accurate process parameters.

d1‧‧‧Conveying direction

g1‧‧‧Air gap distance

100‧‧‧Manufacturing equipment

101‧‧‧Plastic film

102, 103‧‧‧Guide roller

110‧‧‧Extrusion components

111‧‧‧Feed end

112‧‧‧Discharge end

120‧‧‧Gear pump

121‧‧‧Infeed chute

130‧‧‧Cooling roller

131‧‧‧Drive Components

140‧‧‧winding roller

141‧‧‧Drive Components

150‧‧‧Detection element group

151, 152‧‧‧Width detection element

153, 154, 155‧‧‧Thickness detection element

160‧‧‧Control Components

Claims (6)

A method for manufacturing a plastic film, comprising: providing a manufacturing device for a plastic film, comprising: an extruding element having a feed end and a discharge end, and the plastic film is provided from the discharge end; a gear pump adjacent to the feed end The material end is configured to control the feeding rate of the extruding element; the cooling roller is arranged adjacent to the discharge end, and the cooling roller is spaced from the discharge end by an air gap distance, the cooling roller used to control the extruding rate of the film extruding element and provide a conveying direction; a winding roller, arranged behind the cooling roller along the conveying direction, is used to collect the cooled plastic film; and a detection element A group is arranged between the cooling roller and the winding roller along the conveying direction, and the detection element group has a thickness detection element and a width detection element; input product parameters to the prediction model and output process parameters , wherein the product parameters include the material, thickness and width of the plastic film, and the process parameters include the speed of the gear pump, the air gap distance, the operating temperature of the extrusion element, and the stretch ratio of the plastic film , and the stretching ratio is the ratio of the rotational speed of the winding roller to the rotational speed of the cooling roller; adjust the rotational speed of the gear pump and the air gap distance with the process parameters; The parameters are normalized to obtain the normalized operating temperature, the normalized gear pump speed, the normalized air gap distance and the normalized stretch ratio, wherein the product parameters are input to the prediction model and the process parameters are output. The step further includes obtaining the process parameters with the following first equation and second equation, the first equation: Y ₁ =K ₁ +A ₁ ×Z ₁ +B ₁ ×Z ₂ +C ₁ ×Z ₃ +D ₁ ×Z ₄ ; and the second equation: Y ₂ =K ₂ +A ₂ ×Z ₁ +B ₂ ×Z ₂ +C ₂ ×Z ₃ +D ₂ ×Z ₄ , where Y ₁ is the thickness of the plastic film, Y ₂ is the width of the plastic film, K1 is _a constant of _-0.91 ~0.74, K2 is a constant of 0.12~0.18, A1 is _a constant of _-0.52 ~-0.23, A2 is _a constant of -0.08~0.15, B1 is a constant of -0.42~0.69, B2 is a constant of 0.17~0.41, _C1 is a constant of -0.61~0.37, _C2 is a constant of _-0.09 ~0.13, D1 is _a constant of -0.38~1.17, and D2 is a constant of _-0.38 ~1.17. _A constant from -0.14 to 0.05, Z1 is the normalized operating temperature, _Z2 is the normalized gear pump rotational speed, _Z3 is the normalized air gap distance, and _Z4 is the normalized stretch ratio . The method for manufacturing a plastic film according to the claim 1, wherein the normalizing step comprises: re-scaling the operating temperature to 0 to 1 to obtain the normalized operating temperature; rescaling speed from 0 to 1 to obtain the normalized gear pump speed; rescaling the air gap distance from 0 to 1 to obtain the normalized air gap distance; and rescaling the stretch ratio 0 to 1 to get the normalized pull stretch ratio. The method for producing a plastic film according to the first item of the scope of the application, wherein when the material of the plastic film is a thermoplastic polyester elastomer, K ₁ is a constant of -0.91~-0.75, and K ₂ is a constant of 0.15~0.18 Constant, A1 is _a constant of _-0.52 ~-0.42, A2 is a constant of 0.12~0.15, B1 is _a constant of 0.56~0.69, _B2 is a constant of 0.33~0.41, and _C1 is a constant of -0.61~-0.50 , C ₂ is a constant of -0.09~-0.07, D ₁ is a constant of 0.96~1.17, and D ₂ is a constant of 0.04~0.05. The method for producing a plastic film according to the first item of the scope of the application, wherein when the material of the plastic film is thermoplastic polyurethane, K ₁ is a constant of 0.60-0.74, K ₂ is a constant of 0.12-0.15, and A ₁ is _A constant of -0.29~-0.23, A2 is a constant of -0.08~-0.06, B1 is _a constant of -0.42~ _-0.35 , B2 is a constant of 0.17~0.20, _C1 is a constant of 0.31~0.37, _C2 is a constant of 0.11 to 0.13, D ₁ is a constant of -0.38 to -0.31, and D ₂ is a constant of -0.14 to -0.12. The manufacturing method of the plastic film according to the claim 1, wherein the manufacturing device of the plastic film further comprises a positioning element, which is arranged on the cooling roller or on the discharging end. The manufacturing method of the plastic film according to the claim 1 of the claimed scope, wherein the manufacturing device of the plastic film further comprises a positioning control device The device is connected to the cooling roller or the discharging end, and the positioning control device is used to control the air gap distance between the cooling roller and the discharging end.

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