CN112936924A - Apparatus and method for manufacturing plastic film - Google Patents
Apparatus and method for manufacturing plastic film Download PDFInfo
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- CN112936924A CN112936924A CN201911257020.6A CN201911257020A CN112936924A CN 112936924 A CN112936924 A CN 112936924A CN 201911257020 A CN201911257020 A CN 201911257020A CN 112936924 A CN112936924 A CN 112936924A
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
- B29D—PRODUCING PARTICULAR ARTICLES FROM PLASTICS OR FROM SUBSTANCES IN A PLASTIC STATE
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- B29D7/01—Films or sheets
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Abstract
A device and a method for manufacturing a plastic film. The plastic film manufacturing device comprises an extrusion element, a gear pump, a cooling roller, a winding roller and a detection element group. The extrusion component has a feeding end and a discharging end, and the plastic film is provided from the discharging end. A gear pump is disposed adjacent the feed end and is used to control the feed rate of the extruder elements. The cooling roller is arranged close to the discharge end, and the cooling roller and the discharge end are separated by an air gap distance. The cooling roller is used for controlling the extrusion speed of the film extrusion element and providing the conveying direction. The rolling roller is arranged behind the cooling roller along the conveying direction and is used for collecting the cooled plastic film. The detecting element group is arranged between the cooling roller and the winding roller, and the detecting element group is provided with a thickness detecting element and a width detecting element. The manufacturing device and the manufacturing method of the plastic film can automatically manufacture the plastic film.
Description
Technical Field
The invention relates to a manufacturing device and a manufacturing method of a plastic film.
Background
Plastic films are widely used in various fields such as packaging, plastic bags, labels, buildings, electronic components, and clothes, and the thickness and width of the plastic films vary with different fields and demands.
In the manufacturing process, an operator can manufacture the plastic film with the expected thickness and width by repeatedly testing different manufacturing parameters for a long time. In general, the operator needs to accumulate experience for a long time to set the correct manufacturing parameters more efficiently, and the accumulated experience of the operator often faces the problem of difficult inheritance. Therefore, how to more efficiently set and record the manufacturing parameters to precisely manufacture the required plastic film is a problem to be solved in the art.
Disclosure of Invention
One embodiment of the present disclosure provides an apparatus for manufacturing a plastic film, which includes an extruding device, a gear pump (gear pump), a cooling roller, a winding roller, and a detecting device set. The extrusion component has a feeding end and a discharging end, and the plastic film is provided from the discharging end. A gear pump is disposed adjacent the feed end and is used to control the feed rate of the extruder elements. The cooling roller is arranged close to the discharge end, and the cooling roller and the discharge end are separated by an air gap distance. The cooling roller is used for controlling the extrusion speed of the film extrusion element and providing the conveying direction. The rolling roller is arranged behind the cooling roller along the conveying direction and is used for collecting the cooled plastic film. The detecting element group is arranged between the cooling roller and the winding roller along the conveying direction, and the detecting element group is provided with a thickness detecting element and a width detecting element.
In some embodiments, the apparatus for manufacturing plastic film further comprises a positioning element disposed on the cooling roller or the discharge end.
In some embodiments, the apparatus for manufacturing plastic film further comprises a positioning control device connected to the cooling roller or the discharge end. The positioning control device is used for controlling the air gap distance between the cooling roller and the discharge end.
One embodiment of the present disclosure provides a method for manufacturing a plastic film, which includes the following steps. An apparatus for manufacturing a plastic film is provided. Inputting product parameters to the prediction model and outputting process parameters, wherein the product parameters comprise the material, thickness and width of the plastic film, and the process parameters comprise the gear pump rotation speed and the air gap distance. And adjusting the rotation speed and the air gap distance of the gear pump according to the process parameters.
In some embodiments, the process parameters include an operating temperature of the extrusion device and a draw ratio of the plastic film, and the draw ratio is a ratio of a rotation speed of the take-up roller to a rotation speed of the cooling roller.
In some embodiments, the method for manufacturing plastic film further comprises normalizing the process parameters to obtain a normalized operating temperature, a normalized gear pump speed, a normalized air gap distance, and a normalized draw ratio.
In some embodiments, the normalizing step includes the following steps. The operating temperature is rescaled to 0 to 1 to obtain a normalized operating temperature. The gear pump speed is rescaled to 0 to 1 to obtain the normalized gear pump speed. The air gap distance is rescaled to 0 to 1 to obtain a normalized air gap distance. And rescaling the stretch ratio to 0 to 1 to obtain the normalized stretch ratio.
In some embodiments, the step of inputting the product parameter to the predictive model and outputting the process parameter further comprises obtaining the process parameter according to a first equation and a second equation: the first equation: y is1＝K1+A1×Z1+B1×Z2+C1×Z3+D1×Z4(ii) a And a second equation: y is2＝K2+A2×Z1+B2×Z2+C2×Z3+D2×Z4Wherein Y is1Is the thickness of the plastic film, Y2Is the width of the plastic film, K1Is a constant of-0.91 to 0.74, K2A constant of 0.12 to 0.18, A1Is a constant of-0.52 to-0.23, A2A constant of-0.08 to 0.15, B1A constant of-0.42 to 0.69, B2A constant of 0.17 to 0.41, C1A constant of-0.61 to 0.37, C2Is a constant of-0.09 to 0.13, D1A constant of-0.38 to 1.17, D2A constant of-0.14 to 0.05, Z1To normalize the operating temperature, Z2To normalize gear pump speed, Z3Is normalized to the air gap distance, and Z4Is the normalized draw ratio.
In some embodiments, when the plastic film is made of thermoplastic polyester elastomer (TPEE), K1Is a constant of-0.91 to-0.75, K2Is 0.15 &Constant of 0.18, A1Is a constant of-0.52 to-0.42, A2A constant of 0.12 to 0.15, B1A constant of 0.56 to 0.69, B2A constant of 0.33 to 0.41, C1Is a constant of-0.61 to-0.50, C2Is a constant of-0.09 to-0.07, D1Is a constant of 0.96 to 1.17, and D2Is a constant of 0.04 to 0.05.
In some embodiments, when the plastic film is made of Thermoplastic Polyurethane (TPU), K is1Is a constant of 0.60 to 0.74, K2A constant of 0.12 to 0.15, A1Is a constant of-0.29 to-0.23, A2A constant of-0.08 to-0.06, B1A constant of-0.42 to-0.35, B2A constant of 0.17 to 0.20, C1A constant of 0.31 to 0.37, C2A constant of 0.11 to 0.13, D1Is a constant of-0.38 to-0.31, and D2Is a constant of-0.14 to-0.12.
Drawings
FIG. 1 is a block diagram of an apparatus for manufacturing plastic films according to one embodiment of the present disclosure;
FIG. 2 is a perspective view of an apparatus for manufacturing plastic films according to one embodiment of the present disclosure;
FIG. 3 is a perspective view of an apparatus for manufacturing plastic films according to another embodiment of the present disclosure;
FIG. 4 is a flow chart illustrating a method for manufacturing a plastic film according to an embodiment of the present disclosure;
FIG. 5 is a flow chart illustrating a method for manufacturing a plastic film according to another embodiment of the present disclosure.
[ notation ] to show
d1 … conveying direction
g1 … air gap distance
S11, S12, S13, S14, S15 and S16 … steps
100. 100A … manufacturing device
101 … Plastic film
102. 103 … guide roller
110 … extrusion element
111 … feed end
112 … discharge end
120 … gear pump
121 … feed chute
130 … Cooling roller
131 … driving element
132 … positioning control device
133 … positioning element
140 … wind-up roller
141 … driving element
150 … detection element group
151. 152 … Width detection element
153. 154, 155 … thickness detection element
160 … control element
170 … input element
Detailed Description
The following detailed description of the embodiments with reference to the accompanying drawings is provided for purposes of illustration only and is not intended to limit the scope of the present disclosure, as the description of the structure and operation is not intended to limit the order in which the components may be rearranged, so as to provide a device with equivalent functionality. In addition, the drawings are for illustrative purposes only and are not drawn to scale. For ease of understanding, like elements in the following description will be described with like reference numerals.
Referring to fig. 1, fig. 1 is a block diagram illustrating an apparatus 100 for manufacturing a plastic film according to an embodiment of the disclosure. The manufacturing apparatus 100 includes a gear pump 120, a cooling roller 130, a take-up roller 140, and a detecting element group 150, and the detecting element group 150 includes width detecting elements 151, 152 and thickness detecting elements 153, 154, 155.
For example, the manufacturing apparatus 100 of the present embodiment may further include a control element 160 electrically connected to the gear pump 120, the cooling roller 130, the take-up roller 140 and the detecting element set 150. The control unit 160 controls the rotation speed of the gear pump 120, the rotation speed of the cooling roller 130, and the rotation speed of the take-up roller 140, and acquires the detection data from the width detection elements 151 and 152 and the thickness detection elements 153, 154, and 155 of the detection element group 150.
The manufacturing apparatus 100 may further include an input device 170 electrically connected to the control device 160. For example, the input device 170 may include a mouse, a keyboard, or an external hard disk or a flash drive (cd), or may be a touch module integrally formed with the control device 160, but the disclosure is not limited thereto. The input device 170 is used to input product parameters to the control device 160. In other embodiments of the present disclosure, the product parameters may also be directly stored in the control component 160, but the present disclosure is not limited thereto.
For example, the product parameters input to the control component 160 may include the material, thickness and width of the plastic film, and the prediction model stored in the control component 160 may output the process parameters after inputting the product parameters, so as to control the gear pump 120, the cooling roller 130, the take-up roller 140 and the detecting component group 150, thereby providing an automated method for manufacturing the plastic film.
Referring to fig. 2, fig. 2 is a schematic diagram illustrating an apparatus 100 for manufacturing a plastic film according to the present embodiment. The manufacturing apparatus 100 includes an extruding unit 110, a gear pump 120, a cooling roller 130, a take-up roller 140, and a detecting unit group 150.
The extruding member 110 has a feeding end 111 and a discharging end 112, and the plastic film 101 is provided from the discharging end 112. A gear pump 120 is disposed adjacent the feed end 111 to control the feed rate of the extruder 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 materials may include thermoplastic polyester elastomer (TPEE) or Thermoplastic Polyurethane (TPU), and the disclosure is not limited thereto. The gear pump 120 is connected between the feed tank 121 and the feed end 111 of the extruder element 110, so that the gear pump 120 can control the feed rate of the raw material from the feed tank 121 to the feed end 111.
The discharge end 112 of the extruding device 110 may have a strip-shaped opening, so that the molten 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 device 110 for receiving and cooling the plastic film 101 from the extruding device 110. The cooling roller 130 is spaced from the discharging end 112 by an air gap distance g1, and the air gap distance g1 is substantially the distance that the plastic film 101 moves from the discharging end 112 of the extruding device 110 to the cooling roller 130.
On the other hand, the cooling roller 130 can control the extrusion speed of the film extrusion element 110 and determine the conveying direction d 1. For example, the cooling roller 130 can drive the plastic film 101 to be extruded from the extruding device 110 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 disposed after the cooling roller 130 in the conveyance direction d 1. 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 the guide rollers 102 and 103 are disposed between the cooling roller 130 and the take-up roller 140 along the conveying direction d 1. The guide rollers 102, 103 can maintain the plastic film 101 at a proper height, and at the same time, the plastic film 101 can be stretched along the conveying direction d1 between the cooling roller 130 and the take-up roller 140.
The detecting element group 150 is disposed between the cooling roller 130 and the take-up roller 140 along the conveying direction d1, and the detecting element group 150 has thickness detecting elements 153, 154, 155 distributed above the plastic film 101 and width detecting elements 151, 152 located at two sides of the plastic film 101.
For example, the thickness detecting elements 153, 154, 155 may be spaced apart by a measuring distance in a direction perpendicular to the conveying direction d1, and the measuring distance may fall within a range of 50 cm to 150 cm, so as to detect the thickness at different positions of the plastic film 101, so as to detect whether the thickness standard deviation at each position on the plastic film 101 is too large. The width detection elements 151 and 152 and the thickness detection elements 153, 154 and 155 may each include a laser displacement sensor(s), but the disclosure is not limited thereto.
Therefore, the manufacturing apparatus 100 of the present embodiment can monitor the thickness and the width of the plastic film 101 through the detecting element set 150, and then automatically manufacture the plastic film 101 meeting the width and the thickness requirements by matching the extruding element 110, the gear pump 120, the cooling roller 130 and the winding roller 140.
As described above, the control unit 160 of the manufacturing apparatus 100 can be electrically connected to the gear pump 120, the cooling roller 130, the take-up roller 140 and the detecting element group 150. For example, the control component 160 may be a touch-controlled computer that stores a prediction model to output process parameters according to product parameters, including the rotational speed of the gear pump 120 and the gap distance g 1. Thus, when the user inputs product parameters into 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 the control element 160 drives the gear pump 120 at the gear pump speed predicted by the model output.
Further, the process parameters may also include the operating temperature of the extrusion device 110 and the stretch ratio of the plastic film 101. The operating temperature of the extrusion member 110 may be the temperature at which the molten feedstock is extruded from the discharge end 112 of the extrusion member 110. The draw ratio is the ratio of the rotational speed of the take-up roll 140 to the rotational speed of the cooling roll 130. The control component 160 can control the rotation speed of the cooling roller 130 and the rotation speed of the take-up roller 140 according to the stretch ratio of the process parameters outputted by the prediction model, and adjust the stretching of the plastic film 101 on the guide rollers 102 and 103 by adjusting the difference between the rotation speed of the take-up roller 140 and the rotation speed of the cooling roller 130.
For example, the manufacturing apparatus 100 may include a driving element 131 and a driving element 141, wherein the driving element 131 is connected to and drives the cooling roller 130, and the driving element 141 is connected to and drives the take-up roller 140. The control element 160 can control the rotation speed of the cooling roller 130 by being electrically connected to the driving element 131, and can control the rotation speed of the take-up roller 140 by being electrically connected to the driving element 141.
On the other hand, the detecting element set 150 can detect the thickness and the width of the plastic film 101, and the control element 160 can also compare the thickness and the width of the plastic film 101 according to the detecting data of the detecting element set 150 and the product parameters, so as to further ensure the yield of manufacturing the plastic film 101.
Since the control device 160 is electrically connected to the gear pump 120, the manufacturing apparatus 100 can adjust the rotation speed of the gear pump 120 in real time according to the detection result of the detection device set 150 during the manufacturing process of the plastic film 101, so as to accurately maintain the target thickness and width of the elastic film.
Referring to fig. 3, fig. 3 is a schematic diagram illustrating an apparatus 100A for manufacturing a plastic film according to the present embodiment. The manufacturing apparatus 100A is similar to the manufacturing apparatus 100 of the above embodiment, and includes an extruding unit 110, a gear pump 120, a cooling roller 130, a winding roller 140, and a detecting unit group 150, and the details of the same elements are not repeated herein. The manufacturing apparatus 100A further includes a positioning member 133 disposed at the discharge end 112 of the extrusion member 110. The positioning element 133 measures an air gap distance g1 between the feeding end 112 and the cooling roller 130, so that the manufacturing apparatus 100A can adjust the cooling roller 130 more precisely according to the air gap distance g1 provided by the control element 160.
It should be noted that the positioning element 133 of the present embodiment is not limited to directly measure the air gap distance g1, and in other embodiments, the positioning element 133 may further measure other positions of the cooling roller 130 on the discharging end 112 to calculate the corresponding air gap distance g 1. 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 to the discharging end 112.
The manufacturing apparatus 100A further includes a positioning control device 132 connected to the cooling roller 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 may include an oil pressure device, which can adjust the position of the rotating shaft of the cooling roller 130, and thus adjust the air gap distance g 1. In other embodiments, the positioning control 132 may also be disposed at the discharge end 112, with the air gap distance g1 being adjusted by moving the discharge end 112.
The control device 160 is electrically connected to the positioning control device 132 and the positioning device 133, and the predictive model of the control device 160 can output the process parameters according to the product parameters, and the process parameters include the gap distance g 1. Therefore, after the user inputs the product parameters into the control unit 160, the control unit 160 can automatically adjust the position of the cooling roller 130 according to the air gap distance g1 outputted by the prediction model, and then the control unit 160 drives the gear pump 120 at the gear pump rotation speed outputted by the prediction model. 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 precisely maintain the target thickness and width of the elastic film.
Referring to fig. 4, fig. 4 is a schematic flow chart illustrating a manufacturing method of a plastic film according to the present embodiment. The manufacturing method of the embodiment includes the following steps. A device for manufacturing a plastic film is provided (step S11). Inputting product parameters including material, thickness and width of the plastic film into the prediction model and outputting process parameters including gear pump rotation speed and air gap distance (step S12). And adjusting the gear pump rotation speed 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-described embodiment. Reference is now made to the reference numerals in figure 2. As mentioned above, the process parameters may further include the operating temperature of the extrusion device 110 and the stretch ratio of the plastic film 101, and the stretch ratio is the ratio of the rotation speed of the take-up roller 140 to the rotation speed of the cooling roller 130.
Since the prediction model can directly output appropriate process parameters according to the product parameters, the manufacturing method of the embodiment can effectively manufacture the plastic film with appropriate thickness and width by using various materials.
On the other hand, the detecting element set 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.
Referring to fig. 5, fig. 5 is a flow chart illustrating a manufacturing method of 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 embodiment described above with reference to fig. 4, and the same steps are not described again here. The manufacturing method of the present embodiment further includes the following steps after adjusting the gear pump rotation speed and the air gap distance by the process parameters (step S13). The thickness and width of the plastic film manufactured by the process parameters are measured (step S14). The normalization process is performed on the process parameters (step S15). The first equation and the second equation of the prediction model are trained by machine learning using 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 predictive model and outputting the process parameters further comprises the steps of: y is1＝K1+A1×Z1+B1×Z2+C1×Z3+D1×Z4(ii) a And a second equation: y is2＝K2+A2×Z1+B2×Z2+C2×Z3+D2×Z4The process parameters are obtained. The product parameter comprises Y1And Y2Wherein Y is1Is the thickness of the plastic film, Y2Is the width of the plastic film. The process parameters include Z1～Z4Wherein Z is1To normalize the operating temperature, Z2To normalize gear pump speed, Z3Is normalized to the air gap distance, and Z4Is the normalized draw ratio. In the first equation, K1Is a constant of-0.91 to 0.74, A1A constant of-0.52 to-0.23, B1A constant of-0.42 to 0.69, C1A constant of-0.61 to 0.37, D1Is a constant of-0.38 to 1.17. In the second equation, K2A constant of 0.12 to 0.18, A2A constant of-0.08 to 0.15, B2A constant of 0.17 to 0.41, C2Is a constant of-0.09 to 0.13, D2Is a constant of-0.14 to 0.05.
In the step of normalizing the process parameters (step S15), the manufacturing method of the present 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, so that the values of the first equation and the second equation of the training prediction model can fall within the proper range when the prediction model is trained (step S16), which is more beneficial for machine learning of the training prediction model.
In detail, ZhengThe normalization step includes the following steps. The operating temperature is rescaled to 0 to 1 to obtain a normalized operating temperature. The gear pump speed is rescaled to 0 to 1 to obtain the normalized gear pump speed. The air gap distance is rescaled to 0 to 1 to obtain a normalized air gap distance. And rescaling the stretch ratio to 0 to 1 to obtain the normalized stretch ratio. In some embodiments, the rescaling calculation is, for example: xnorm＝(X-Xmin)/(Xmax-Xmin) Wherein X isnormIs normalized numerical value, X is experimental numerical value before normalization, XmaxIs the maximum experimental value before normalization, XminIs the minimum experimental value before normalization.
For example, the gear pump rotational speed is originally a value falling between 1 and 6 revolutions per minute, and the normalizing step rescales the value falling between 1 and 6 to a value falling between 0 and 1 to obtain the normalized gear pump rotational speed. The air gap distance is originally a value falling between 0.5 cm and 2.5 cm, and the normalizing step rescales the value falling between 0.5 and 2.5 to a value falling between 0 and 1 to obtain the normalized air gap distance. The stretch ratio is originally a value falling between 30 and 70, which the normalization step rescales to a value falling between 0 and 1 to obtain a normalized stretch ratio.
When the material is a thermoplastic polyester elastomer (TPEE), the operating temperature is originally a value falling between 200 degrees celsius and 230 degrees celsius, and the normalizing step rescales the value falling between 200 and 300 to a value falling between 0 and 1 to obtain the normalized operating temperature. When the material is Thermoplastic Polyurethane (TPU), the operating temperature is originally a value falling between 170 degrees celsius and 200 degrees celsius, and the normalizing step rescales the value falling between 170 and 200 degrees celsius to a value falling between 0 and 1 to obtain a normalized operating temperature.
On the other hand, when inputting the product parameters to the prediction model and outputting the process parameters (step 12), the output process parameters may also include a normalized operating temperature, a normalized gear pump rotational speed, a normalized air gap distance and a normalized draw ratio, and these process parameters output by the prediction model may be adjusted to the actual operating temperature, gear pump rotational speed, air gap distance and draw ratio according to the scaling range in the above normalization step.
In another aspect, in the embodiment, when the plastic film is manufactured according to the process parameters outputted by the prediction model, the width and thickness of the actually manufactured plastic film and the product parameters corresponding to the process parameters can be further trained. When the width, thickness and product parameters of the actually manufactured plastic film are different, the manufacturing method of the embodiment may retrain the prediction model through step S16, so that the trained prediction model may 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), K is calculated in the first equation and the second equation of the prediction model1A constant of-0.91 to-0.75, for example-0.828; k2A constant of 0.15 to 0.18, for example 0.162; a. the1A constant of-0.52 to-0.42, for example-0.471; a. the2A constant of 0.12 to 0.15, for example 0.135; b is1A constant of 0.56 to 0.69, for example 0.627; b is2A constant of 0.33 to 0.41, for example 0.37; c1A constant of-0.61 to-0.50, for example-0.55; c2A constant of-0.09 to-0.07, for example-0.078; d1A constant of 0.96 to 1.17, for example 1.063; and D2A constant of 0.04 to 0.05, for example, 0.044.
On the other hand, when the material of the plastic film is Thermoplastic Polyurethane (TPU), K is expressed in the first equation and the second equation of the prediction model1A constant of 0.60 to 0.74, for example 0.671; k2A constant of 0.12 to 0.15, for example 0.132; a. the1A constant of-0.29 to-0.23, for example-0.26; a. the2A constant of-0.08 to-0.06, for example-0.069; b is1A constant of-0.42 to-0.35, for example-0.386; b is2A constant of 0.17 to 0.20, for example 0.185; c1A constant of 0.31 to 0.37, for example 0.34; c2A constant of 0.11 to 0.13, for example 0.117; d1A constant of-0.38 to-0.31, for example-0.342; and D2A constant of-0.14 to-0.12, for example-0.128.
Therefore, the prediction model not only can provide the process parameters based on the input product parameters, but also can select the parameters in the first equation and the second equation according to the plastic film material in the product parameters, thereby providing more accurate process parameters.
Claims (10)
1. An apparatus for manufacturing a plastic film, comprising:
an extrusion element having a feed end and a discharge end, the plastic film being provided from the discharge end;
a gear pump disposed adjacent to the feed end for controlling the feed rate of the extruder element;
a cooling roller disposed adjacent to the discharge end and spaced from the discharge end by an air gap distance, the cooling roller being configured to control an extrusion rate of the film extrusion element and provide a conveying direction;
a take-up roller disposed behind the cooling roller along the conveying direction for collecting the cooled plastic film; and
and a detecting element group which is arranged between the cooling roller and the winding roller along the conveying direction and is provided with a thickness detecting element and a width detecting element.
2. The apparatus for manufacturing plastic film as defined in claim 1, further comprising a positioning element disposed on the cooling roller or the discharge end.
3. The apparatus for manufacturing plastic film as defined in claim 1, further comprising a positioning control device connected to the cooling roller or the discharge end, wherein the positioning control device is used for controlling the air gap distance between the cooling roller and the discharge end.
4. The manufacturing method of the plastic film is characterized by comprising the following steps:
providing a device for manufacturing a plastic film according to any one of claims 1 to 3;
inputting product parameters to a prediction model and outputting process parameters, wherein the product parameters comprise the material, the thickness and the width of the plastic film, and the process parameters comprise the gear pump rotating speed and the air gap distance; and
and adjusting the gear pump rotating speed and the air gap distance according to the process parameters.
5. The method as claimed in claim 4, wherein the process parameters include an operating temperature of the extrusion device and a draw ratio of the plastic film, and the draw ratio is a ratio of a rotation speed of the take-up roller to a rotation speed of the cooling roller.
6. The method of claim 5, further comprising normalizing the process parameters to obtain a normalized operating temperature, a normalized gear pump speed, a normalized air gap distance, and a normalized draw ratio.
7. The method as claimed in claim 6, wherein the normalizing step comprises:
rescaling the operating temperature to 0 to 1 to obtain the normalized operating temperature;
rescaling the gear pump rotating speed to 0-1 again to obtain the normalized gear pump rotating speed;
rescaling the air gap distance to 0 to 1 to obtain the normalized air gap distance; and
rescaling the stretch ratio to 0 to 1 to obtain the normalized stretch ratio.
8. The method as claimed in claim 6, wherein the step of inputting the product parameters to the predictive model and outputting the process parameters further comprises obtaining the process parameters according to a first equation and a second equation,
the first equation: y is1＝K1+A1×Z1+B1×Z2+C1×Z3+D1×Z4(ii) a And
the second equation: y is2＝K2+A2×Z1+B2×Z2+C2×Z3+D2×Z4，
Wherein Y is1Is the thickness of the plastic film, Y2Is the width of the plastic film, K1Is a constant of-0.91 to 0.74, K2A constant of 0.12 to 0.18, A1Is a constant of-0.52 to-0.23, A2A constant of-0.08 to 0.15, B1A constant of-0.42 to 0.69, B2A constant of 0.17 to 0.41, C1A constant of-0.61 to 0.37, C2Is a constant of-0.09 to 0.13, D1A constant of-0.38 to 1.17, D2A constant of-0.14 to 0.05, Z1For the normalized operating temperature, Z2For said normalized gear pump speed, Z3Is the normalized air gap distance, and Z4The normalized draw ratio.
9. The method as claimed in claim 8, wherein when the plastic film is made of thermoplastic polyester elastomer, K is1Is a constant of-0.91 to-0.75, K2A constant of 0.15 to 0.18, A1Is a constant of-0.52 to-0.42, A2A constant of 0.12 to 0.15, B1A constant of 0.56 to 0.69, B2A constant of 0.33 to 0.41, C1Is a constant of-0.61 to-0.50, C2Is a constant of-0.09 to-0.07, D1Is a constant of 0.96 to 1.17, and D2Is a constant of 0.04 to 0.05.
10. The method as claimed in claim 8, wherein when the plastic film is made of thermoplastic polyurethane, K is1Is a constant of 0.60 to 0.74, K2A constant of 0.12 to 0.15, A1Is a constant of-0.29 to-0.23, A2A constant of-0.08 to-0.06, B1A constant of-0.42 to-0.35, B2A constant of 0.17 to 0.20, C1A constant of 0.31 to 0.37, C2A constant of 0.11 to 0.13, D1Is a constant of-0.38 to-0.31, and D2Is a constant of-0.14 to-0.12.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201911257020.6A CN112936924B (en) | 2019-12-10 | 2019-12-10 | Method for manufacturing plastic film |
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Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN106182673A (en) * | 2016-08-25 | 2016-12-07 | 安庆市兴丰工贸有限公司 | The feeding wrap-up that a kind of plastic sheeting produces |
| CN107310173A (en) * | 2017-05-28 | 2017-11-03 | 中国计量大学 | The character of film thickness monitoring system and film profile image is extracted and thickness acquisition method |
| CN109435218A (en) * | 2018-11-13 | 2019-03-08 | 重庆瑞霆塑胶有限公司 | The automated production system of processing of CPP film |
| CN110370600A (en) * | 2017-05-28 | 2019-10-25 | 浙江凯利新材料股份有限公司 | A kind of film thickness monitoring system self-positioning based on bolt |
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Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106182673A (en) * | 2016-08-25 | 2016-12-07 | 安庆市兴丰工贸有限公司 | The feeding wrap-up that a kind of plastic sheeting produces |
| CN107310173A (en) * | 2017-05-28 | 2017-11-03 | 中国计量大学 | The character of film thickness monitoring system and film profile image is extracted and thickness acquisition method |
| CN110370600A (en) * | 2017-05-28 | 2019-10-25 | 浙江凯利新材料股份有限公司 | A kind of film thickness monitoring system self-positioning based on bolt |
| CN109435218A (en) * | 2018-11-13 | 2019-03-08 | 重庆瑞霆塑胶有限公司 | The automated production system of processing of CPP film |
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