EVA film thickness online measuring device and EVA film production device

Abstract

The present application discloses an EVA film thickness online measuring device and an EVA film production device, comprising a frame, a laser thickness measuring unit and two guide roller units; the guide roller unit comprises a first fixed guide roller, a lifting guide roller, a second fixed guide roller and a translation guide roller; the laser thickness measuring unit comprises a mounting frame, a first mobile unit, a first laser rangefinder, a second mobile unit and a second laser rangefinder. The production device of the present application, the translation guide roller and the lifting guide roller of the measuring device have an adjustment function, and can be measured using a variety of measurement methods, thereby achieving more accurate online monitoring.

Description

Technical Field

[0001] The present invention relates to the technical field of EVA film production, and more specifically to an EVA film thickness online measuring device and an EVA film production device. Background Art

[0002] Due to its good flexibility, transparency and weather resistance, EVA film is widely used in packaging, construction, solar panels and other fields. EVA film plays an increasingly important role in modern society due to its excellent performance and wide range of applications.

[0003] During the production process of EVA film, the thickness of the EVA film needs to be detected online. However, the existing production equipment has deficiencies in the detection link. First, the film is easily affected by various factors during high-speed transmission, which may cause the film to shake or relax. This instability will cause inaccurate measurement data from the measuring device. In addition, due to the limitations of the equipment itself, the measuring device can often only measure the thickness of the film in one area. The measurement area and measurement mode are relatively single, and it is impossible to measure from multiple angles to confirm that the thickness of the EVA film on the EVA film production line meets the requirements. Summary of the invention

[0004] The present invention aims to overcome the defects of the prior art and provides an EVA film thickness online measuring device and an EVA film production device.

[0005] In order to achieve the above-mentioned purpose, the present invention provides the following technical solutions: a thin film thickness online measuring device, comprising a frame, a laser thickness measuring unit and two guide roller units; the guide roller unit comprises a first fixed guide roller, a lifting guide roller, a second fixed guide roller and a translation guide roller, and the lifting guide roller is located between the first fixed guide roller and the second fixed guide roller; the laser thickness measuring unit comprises a mounting frame, a first mobile unit capable of moving along the mounting frame, a first laser rangefinder mounted on the first mobile unit, a second mobile unit capable of moving along the mounting frame and a second laser rangefinder mounted on the second mobile unit.

[0006] Furthermore, the first fixed guide roller and the second fixed guide roller are both installed on the frame; lifting seats are installed at both ends of the lifting guide roller, and the lifting seats are connected to the limited seat by a spring, an electric lifting rod is connected between the limited seat and the frame, the lifting seat has a limited slide groove, and the limited seat has a limited slide rail matching the limited slide groove; translation seats are installed at both ends of the translation guide roller, and two translation drive units are installed on the frame, and the translation drive units include two end plates, a connecting slide rail connected between the two end plates, and a mounting block fixedly connected to the connecting slide rail, a driving motor is installed at the two end plates, and bearings are installed on both sides of the mounting block, a screw rod is connected between the corresponding driving motor and the bearing, and the translation seat is installed at the connecting slide rail and driven by the screw rod.

[0007] Therefore, the translation drive unit can drive the translation guide roller to translate, and the electric lifting rod can drive the lifting guide roller to lift.

[0008] Furthermore, a fixed axis is installed at the frame, and the mounting frame includes two rotating plates installed on the fixed axis and capable of rotating along the fixed axis, a first connecting plate connected between the two rotating plates, and a second connecting plate connected between the two rotating plates, the first connecting plate has a first track, and the first movable unit can move along the first track, the second connecting plate has a second track, and the second movable unit can move along the second track, both sides of the rotating plate are connected to the frame through an electric telescopic rod, one end of the electric telescopic rod is hinged to the rotating plate, and the other end is hinged to the frame.

[0009] Therefore, the rotating plate can be rotated along the fixed axis by extending and retracting the electric telescopic rod.

[0010] The first mobile unit and the second mobile unit may adopt conventional technologies in the prior art.

[0011] For example, in some embodiments, both the first track and the second track have racks, and both the first mobile unit and the second mobile unit have a driving mechanism and a gear driven by the driving mechanism and meshing with the racks.

[0012] In some embodiments, two driving mechanisms and two screw rod units driven by the driving mechanisms are installed on the mounting frame, and the first moving unit and the second moving unit both have threaded holes that cooperate with the screw rod units.

[0013] Furthermore, a positioning cylinder is installed at the rotating plate, the frame includes two end frames and a connecting cross plate connecting the two end frames, the end frames include a first positioning through hole and two second positioning through holes, and the movable end of the positioning cylinder has a positioning rod that can be inserted into the first positioning through hole and the second positioning through hole.

[0014] Therefore, the positioning rod is inserted into different positioning through holes, and the rotating plate can be firmly locked at different positions.

[0015] Furthermore, the two guide roller units are respectively a first guide roller unit and a second guide roller unit; the online measuring device can be in a first measuring mode, a second measuring mode, a third measuring mode and a fourth measuring mode, in the first measuring mode, the positioning rod is inserted into the first positioning through hole, the first laser rangefinder and the second laser rangefinder are used to measure the thickness of the film between the translation guide roller of the first guide roller unit and the translation guide roller of the second guide roller unit, and the spacing between the translation guide roller of the first guide roller unit and the translation guide roller of the second guide roller unit is the first spacing; in the second measuring mode, the positioning rod is inserted into the first positioning through hole, the first laser rangefinder and the second laser rangefinder are used to measure the thickness of the film between the translation guide roller of the first guide roller unit and the translation guide roller of the second guide roller unit, and the first The spacing between the translation guide roller of the guide roller unit and the translation guide roller of the second guide roller unit is the second spacing, and the first spacing is greater than the second spacing; in the third measurement mode, the positioning rod is inserted into one of the second positioning through holes, and the first laser rangefinder and the second laser rangefinder are used to measure the thickness of the film between the translation guide roller and the second fixed guide roller of the guide roller unit corresponding to the second positioning through hole into which the positioning rod is inserted; in the fourth measurement mode, the positioning rod is inserted into the second positioning through hole corresponding to the second guide roller unit, the positions of the lifting guide roller and the translation guide roller of the second guide roller unit remain unchanged, the translation guide roller of the first guide roller unit moves toward the direction close to the second fixed guide roller, and the lifting guide roller of the first guide roller unit moves upward, so that the film between the translation guide roller and the second fixed guide roller of the second guide roller unit is in a stationary state.

[0016] Therefore, a variety of measurement methods can be used for measurement, which makes the measurement angles more diverse and achieves more accurate online monitoring.

[0017] Furthermore, in the third measurement mode, a line connecting the first laser rangefinder and the second laser rangefinder is perpendicular to the measurement area of ​​the film.

[0018] Furthermore, in the first measurement mode, all the electric lifting rods are at a first height; in the second measurement mode, all the electric lifting rods are at a second height; in the third measurement mode, all the electric lifting rods are at a third height; the first height, the second height and the third height are equal.

[0019] Further, in the fourth measurement mode, the two electric lifting rods of the second guide roller unit are at a fourth height, and the fourth height is equal to the first height.

[0020] Furthermore, the connecting cross plates are two, and each connecting cross plate is provided with two electric lifting rods; the end frame includes a strip base plate fixedly connected to the connecting cross plate, two first mounting vertical plates connected to the strip base plate for mounting a first fixed guide roller, two second mounting vertical plates connected to the strip base plate for mounting a second fixed guide roller, two hinged seats fixedly connected to the strip base plate, an inverted U-shaped frame fixedly connected to the strip base plate, and a top protruding plate fixedly connected to the inverted U-shaped frame, the hinged seat is hinged to the end of the electric telescopic rod, the inverted U-shaped frame is provided with two of the second positioning through holes, the top protruding plate is provided with the first positioning through hole, and the two end plates are fixedly connected to the inverted U-shaped frame.

[0021] Thereby, the overall structure of the measuring device is more stable.

[0022] The present application also discloses a film production device, comprising an extrusion unit, a molding unit, a cooling unit, any one of the above-mentioned film thickness online measuring devices, a slitting unit and a winding unit.

[0023] Beneficial effects:

[0024] 1. In the production device of the present application, the translation guide roller and the lifting guide roller of the measuring device have an adjustment function, which can better adjust the tension and angle of the film, thereby making the measurement more accurate.

[0025] 2. The production device of the present application can be measured using a variety of measurement methods, thereby making the measurement angles more diverse and achieving more accurate online monitoring. BRIEF DESCRIPTION OF THE DRAWINGS

[0026] Figure 1 is a schematic diagram of the first measurement mode;

[0027] Figure 2 This is an enlarged view of area 1A;

[0028] Figure 3 This is an enlarged view of area 1B;

[0029] Figure 4 is a schematic diagram of the second measurement mode;

[0030] Figure 5 This is an enlarged view of area 2A;

[0031] Figure 6 is a schematic diagram of the third measurement mode;

[0032] Figure 7 This is an enlarged view of the 3A area;

[0033] Figure 8 is a schematic diagram of the fourth measurement mode;

[0034] Fig. 9 This is an enlarged view of area 4A;

[0035] Fig.10 This is an enlarged view of area 4B;

[0036] Fig.11 is a schematic diagram of another viewing angle of the fourth measurement mode;

[0037] Fig.12 This is an enlarged view of area 5A.

[0038] Description of reference numerals: frame 1; fixed shaft 1.1; end frame 1.2; strip base plate 1.2.1; first mounting vertical plate 1.2.2; second mounting vertical plate 1.2.3; hinged seat 1.2.4; inverted U-shaped frame 1.2.5; top convex plate 1.2.6; connecting horizontal plate 1.3; first positioning through hole 1.4; second positioning through hole 1.5; first fixed guide roller 2.1; lifting guide roller 2.2; second fixed guide roller 2.3; translation guide roller 2.4; first guide roller unit 2.5; second guide roller unit 2.6; mounting frame 3; Rotating plate 3.1; first connecting plate 3.2; first track 3.3; second connecting plate 3.4; second track 3.5; electric telescopic rod 3.6; positioning cylinder 3.7; first moving unit 4; first laser rangefinder 4.1; second moving unit 5; second laser rangefinder 5.1; lifting seat 6; spring 6.1; limit seat 6.2; electric lifting rod 6.3; limit slide 6.4; translation seat 7; end plate 8.1; connecting slide rail 8.2; mounting block 8.3; drive motor 8.4; bearing 8.5; screw rod 8.6. DETAILED DESCRIPTION

[0039] Embodiments of the present invention are described in detail below, examples of which are shown in the accompanying drawings, wherein the same or similar reference numerals throughout represent the same or similar elements or elements having the same or similar functions. The embodiments described below with reference to the accompanying drawings are exemplary and are intended to be used to explain the present invention, and should not be construed as limiting the present invention.

[0040] Example 1

[0041] Example 1 discloses an online measurement device for the thickness of an EVA film, comprising a frame 1, a laser thickness measuring unit and two guide roller units; the guide roller unit comprises a first fixed guide roller 2.1, a lifting guide roller 2.2, a second fixed guide roller 2.3 and a translation guide roller 2.4, and the lifting guide roller 2.2 is located between the first fixed guide roller 2.1 and the second fixed guide roller 2.3; the laser thickness measuring unit comprises a mounting frame 3, a first mobile unit 4 capable of moving along the mounting frame 3, a first laser rangefinder 4.1 installed on the first mobile unit 4, a second mobile unit 5 capable of moving along the mounting frame 3 and a second laser rangefinder 5.1 installed on the second mobile unit 5. The first fixed guide roller 2.1 and the second fixed guide roller 2.3 are both installed on the frame 1; lifting seats 6 are installed at both ends of the lifting guide roller 2.2, and the lifting seat 6 is connected to the limited seat 6.2 through a spring 6.1, and an electric lifting rod 6.3 is connected between the limited seat 6.2 and the frame 1, and the lifting seat 6 has a limited slide groove 6.4, and the limited seat 6.2 has a limited slide rail that cooperates with the limited slide groove 6.4; translation seats 7 are installed at both ends of the translation guide roller 2.4, and two translation drive units are installed on the frame 1, and the translation drive units include two end plates 8.1, a connecting slide rail 8.2 connected between the two end plates 8.1, and a mounting block 8.3 fixedly connected to the connecting slide rail 8.2, and a driving motor 8.4 is installed at the two end plates 8.1, and bearings 8.5 are installed on both sides of the mounting block 8.3. The corresponding driving motor A screw rod 8.6 is connected between 8.4 and the bearing 8.5, the translation seat 7 is installed on the connecting slide rail 8.2 and is driven by the screw rod 8.6; a fixed axis 1.1 is installed on the frame 1, and the mounting frame 3 includes two rotating plates 3.1 installed on the fixed axis 1.1 and capable of rotating along the fixed axis 1.1, a first connecting plate 3.2 connected between the two rotating plates 3.1, and a second connecting plate 3.4 connected between the two rotating plates 3.1, the first connecting plate 3.2 has a first track 3.3, the first mobile unit 4 can move along the first track 3.3, the second connecting plate 3.4 has a second track 3.5, the second mobile unit 5 can move along the second track 3.5, both sides of the rotating plate 3.1 are connected to the frame 1 through an electric telescopic rod 3.6, one end of the electric telescopic rod 3.6 is hinged to the rotating plate 3.1, and the other end is hinged to the frame 1. A positioning cylinder 3.7 is installed at the rotating plate 3.1, and the frame 1 includes two end frames 1.2 and a connecting cross plate 1.3 connecting the two end frames 1.2. The end frames 1.2 include a first positioning through hole 1.4 and two second positioning through holes 1.5. The movable end of the positioning cylinder 3.7 has a positioning rod that can be inserted into the first positioning through hole 1.4 and the second positioning through hole 1.5.

[0042] The two guide roller units are respectively a first guide roller unit 2.5 and a second guide roller unit 2.6; the online measuring device can be in a first measuring mode, a second measuring mode, a third measuring mode and a fourth measuring mode. In the first measuring mode, the positioning rod is inserted into the first positioning through hole 1.4, and the first laser rangefinder 4.1 and the second laser rangefinder 5.1 are used to measure the thickness of the EVA film between the translation guide roller 2.4 of the first guide roller unit 2.5 and the translation guide roller 2.4 of the second guide roller unit 2.6. The spacing between the translation guide roller 2.4 of the first guide roller unit 2.5 and the translation guide roller 2.4 of the second guide roller unit 2.6 is a first spacing; in the second measuring mode, the positioning rod is inserted into the first positioning through hole 1.4, and the first laser rangefinder 4.1 and the second laser rangefinder 5.1 are used to measure the thickness of the EVA film between the translation guide roller 2.4 of the first guide roller unit 2.5 and the translation guide roller 2.4 of the second guide roller unit 2.6. The spacing between the translation guide roller 2.4 of the second guide roller unit 2.6 is the second spacing, and the first spacing is greater than the second spacing; in the third measurement mode, the positioning rod is inserted into one of the second positioning through holes 1.5, and the first laser rangefinder 4.1 and the second laser rangefinder 5.1 are used to measure the thickness of the EVA film between the translation guide roller 2.4 and the second fixed guide roller 2.3 of the guide roller unit corresponding to the second positioning through hole 1.5 inserted by the positioning rod; in the fourth measurement mode, the positioning rod is inserted into the second positioning through hole 1.5 corresponding to the second guide roller unit 2.6, the positions of the lifting guide roller 2.2 and the translation guide roller 2.4 of the second guide roller unit 2.6 remain unchanged, the translation guide roller 2.4 of the first guide roller unit 2.5 moves toward the direction close to the second fixed guide roller 2.3, and the lifting guide roller 2.2 of the first guide roller unit 2.5 moves upward, so that the EVA film between the translation guide roller 2.4 and the second fixed guide roller 2.3 of the second guide roller unit 2.6 is in a stationary state.

[0043] In the first measurement mode, all the electric lifting rods 6.3 are at a first height; in the second measurement mode, all the electric lifting rods 6.3 are at a second height; in the third measurement mode, all the electric lifting rods 6.3 are at a third height; the first height, the second height and the third height are equal. The connecting transverse plates 1.3 have two, and each connecting transverse plate 1.3 has two electric lifting rods 6.3; the end frame 1.2 includes a strip base plate 1.2.1 fixedly connected to the connecting transverse plate 1.3, two first mounting vertical plates 1.2.2 connected to the strip base plate for mounting a first fixed guide roller 2.1, two second mounting vertical plates 1.2.3 connected to the strip base plate for mounting a second fixed guide roller 2.3, two hinged seats 1.2.4 fixedly connected to the strip base plate, an inverted U-shaped frame 1.2.5 fixedly connected to the strip base plate, and a top convex plate 1.2.6 fixedly connected to the inverted U-shaped frame, the hinged seat 1.2.4 is hinged to the end of the electric telescopic rod 3.6, the inverted U-shaped frame 1.2.5 has two second positioning through holes 1.5, the top convex plate 1.2.6 has the first positioning through hole 1.4, and two end plates 8.1 are fixedly connected to the inverted U-shaped frame 1.2.5.

[0044] Working principle: As shown in the figure, the EVA film is transported at the first guide roller unit and the second guide roller unit. In the first measurement mode, the film between the translation guide rollers of the first guide roller unit and the second guide roller unit is measured, which can be used as the most common measurement method. In the second measurement mode, since the distance between the two translation guide rollers is smaller, the film is smoother and less likely to shake, which is more conducive to measurement. In the third measurement mode, the first and second laser rangefinders can measure the film between the second fixed guide roller and the translation guide roller, so that the film thickness at other positions can be measured. When the measured data in the first, second and third measurement modes are consistent, it not only indicates that the thickness of the film is qualified, but also indicates that the transmission structure of the entire production device is qualified (the third measurement mode must ensure the vertical measurement of the film. If the measured data is consistent with the first measurement mode, it means that the vertical measurement of the film is achieved, which indirectly indicates that the operation of the transmission mechanism is normal), and at the same time, the detection of the motion mechanism of the production line is realized. In the fourth measurement mode, the length of film that can be accommodated at the first guide roller unit is longer due to the movement of the translation guide roller and the lifting guide roller, so that the film at the second guide roller unit does not move (the downstream slitting and winding are suspended at this time), so that more accurate measurement data can be obtained when the film is in a static state. After the measurement is completed, the first guide roller unit returns to its initial state, and the downstream slitting and winding are appropriately accelerated to cooperate with the recovery of the first guide roller unit, and normal production and testing are subsequently resumed. Under normal circumstances, the first measurement mode is used, and the second, third, and fourth measurement modes are used interspersed under certain rules (such as regularly), so that the detection of film thickness is more accurate and comprehensive, and at the same time, the normal operation of the motion mechanism of the production device can be detected.

[0045] Example 2

[0046] Example 2 discloses an EVA film production device, including an extrusion unit, a molding unit, a cooling unit, the EVA film thickness online measuring device described in Example 1, a slitting unit and a winding unit.

[0047] Although the present invention has been illustrated and described with respect to the preferred embodiments, it will be appreciated by those skilled in the art that various changes and modifications may be made to the present invention without departing from the scope of the present invention as defined by the claims.

Claims

1. An EVA film thickness online measuring device, characterized in that: It includes a frame, a laser thickness measuring unit and two guide roller units; the guide roller unit includes a first fixed guide roller, a lifting guide roller, a second fixed guide roller and a translation guide roller, and the lifting guide roller is located between the first fixed guide roller and the second fixed guide roller; the laser thickness measuring unit includes a mounting frame, a first moving unit that can move along the mounting frame, a first laser rangefinder installed on the first moving unit, a second moving unit that can move along the mounting frame, and a second laser rangefinder installed on the second moving unit; The frame is provided with a fixed axis, the mounting frame comprises two rotating plates which are installed on the fixed axis and can rotate along the fixed axis, a first connecting plate connected between the two rotating plates, and a second connecting plate connected between the two rotating plates, the first connecting plate is provided with a first track, the first moving unit can move along the first track, the second connecting plate is provided with a second track, the second moving unit can move along the second track, both sides of the rotating plate are connected to the frame through an electric telescopic rod, one end of the electric telescopic rod is hinged to the rotating plate, and the other end is hinged to the frame; A positioning cylinder is installed at the rotating plate, the frame includes two end frames and a connecting cross plate connecting the two end frames, the end frames include a first positioning through hole and two second positioning through holes, and the movable end of the positioning cylinder has a positioning rod that can be inserted into the first positioning through hole and the second positioning through hole.

2. The EVA film thickness online measuring device according to claim 1, characterized in that: The first fixed guide roller and the second fixed guide roller are both installed on the frame; lifting seats are installed at both ends of the lifting guide roller, and the lifting seats are connected to the limited seat by a spring, and an electric lifting rod is connected between the limited seat and the frame, and the lifting seat is provided with a limiting slide groove, and the limited seat is provided with a limiting slide rail matching the limiting slide groove; translation seats are installed at both ends of the translation guide roller, and two translation drive units are installed on the frame, and the translation drive units include two end plates, a connecting slide rail connected between the two end plates, and a mounting block fixedly connected to the connecting slide rail, and driving motors are installed at the two end plates, and bearings are installed on both sides of the mounting block, and a screw rod is connected between the corresponding driving motor and the bearing, and the translation seat is installed at the connecting slide rail and driven by the screw rod.

3. The EVA film thickness online measuring device according to claim 2, characterized in that: The two guide roller units are respectively the first guide roller unit and the second guide roller unit; the online measuring device can be in the first measuring mode, the second measuring mode, the third measuring mode and the fourth measuring mode. In the first measuring mode, the positioning rod is inserted into the first positioning through hole, and the first laser rangefinder and the second laser rangefinder are used to measure the thickness of the EVA film between the translation guide roller of the first guide roller unit and the translation guide roller of the second guide roller unit, and the spacing between the translation guide roller of the first guide roller unit and the translation guide roller of the second guide roller unit is the first spacing; in the second measuring mode, the positioning rod is inserted into the first positioning through hole, and the first laser rangefinder and the second laser rangefinder are used to measure the thickness of the EVA film between the translation guide roller of the first guide roller unit and the translation guide roller of the second guide roller unit, and the first guide roller The spacing between the translation guide roller of the unit and the translation guide roller of the second guide roller unit is the second spacing, and the first spacing is greater than the second spacing; in the third measurement mode, the positioning rod is inserted into one of the second positioning through holes, and the first laser rangefinder and the second laser rangefinder are used to measure the thickness of the EVA film between the translation guide roller and the second fixed guide roller of the guide roller unit corresponding to the second positioning through hole inserted by the positioning rod; in the fourth measurement mode, the positioning rod is inserted into the second positioning through hole corresponding to the second guide roller unit, the positions of the lifting guide roller and the translation guide roller of the second guide roller unit remain unchanged, the translation guide roller of the first guide roller unit moves toward the direction close to the second fixed guide roller, and the lifting guide roller of the first guide roller unit moves upward, so that the EVA film between the translation guide roller and the second fixed guide roller of the second guide roller unit is in a stationary state.

4. The EVA film thickness online measuring device according to claim 3, characterized in that: In the first measurement mode, all electric lifts are at a first height; in the second measurement mode, all electric lifts are at a second height; in the third measurement mode, all electric lifts are at a third height; the first height, the second height and the third height are equal.

5. The EVA film thickness online measuring device according to claim 2, characterized in that: The connecting cross plates have two, and each connecting cross plate has two electric lifting rods; the end frame includes a strip base plate fixedly connected to the connecting cross plate, two first mounting vertical plates connected to the strip base plate for mounting a first fixed guide roller, two second mounting vertical plates connected to the strip base plate for mounting a second fixed guide roller, two hinged seats fixedly connected to the strip base plate, an inverted U-shaped frame fixedly connected to the strip base plate, and a top convex plate fixedly connected to the inverted U-shaped frame, the hinged seat is hinged to the end of the electric telescopic rod, the inverted U-shaped frame has two of the second positioning through holes, the top convex plate has the first positioning through hole, and the two end plates are fixedly connected to the inverted U-shaped frame.

6. An EVA film production device, characterized in that: The invention comprises an extrusion unit, a molding unit, a cooling unit, an online measuring device for the thickness of an EVA film according to any one of claims 1 to 5, a slitting unit and a winding unit.

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