Thin film end part sagging detection device

Abstract

The utility model provides a thin film end part sagging detection device. The thin film end part sagging detection device comprises a thin film unwinding assembly, a bracket, a first distance measuring assembly, a second distance measuring assembly and a calculator, the thin film unwinding assembly is used for installing and placing a thin film roll, so that the thin film roll can be unfolded on the horizontal reference plane in the length direction of the thin film roll to form a horizontally-arranged thin film to-be-detected surface; the bracket is arranged below a to-be-detected surface of the film; the first distance measuring assembly is fixedly connected to the support and right faces one end, in the width direction, of the to-be-detected face of the film. The second distance measuring assembly is fixedly connected to the support and right faces the other end, in the width direction, of the to-be-detected face of the film. The calculator is electrically connected to the first distance measuring assembly and the second distance measuring assembly; the distance between the first distance measuring assembly and the horizontal reference surface is equal to the distance between the second distance measuring assembly and the horizontal reference surface. According to the utility model, the droop distance of the edge rolling part of the thin film can be measured, so that the production quality of a thin film roll can be conveniently detected.

Description

TECHNICAL FIELD

[0001] The utility model relates to thin film defect detection equipment technical field more specifically, relate to a kind of thin film end sag detection device. BACKGROUND

[0002] Optical PET film is widely used in recent years due to its high light transmittance, low haze, high brightness, good flatness, high temperature and ultraviolet radiation resistance, good stiffness, burn resistance and damage resistance. However, during production, due to the difference in cooling speed of the film, it may cause edge sagging defects. If the defect exceeds a certain range, it may cause the film to run off-center or have excess edge during use, resulting in uneven glue application, glue overflow and insufficient product width. Therefore, it is important to detect and control the edge sagging defect during film production.

[0003] For optical PET film, there is currently no effective method to accurately detect whether the PET film has edge sagging defects, which may result in failure to timely detect and adjust or improve the defect. SUMMARY

[0004] (I) Technical problem to be solved

[0005] The technical problem to be solved by the utility model is the inability to detect the edge sagging defect of the film in the prior art.

[0006] (II) Technical solution

[0007] To achieve the above purpose, the utility model adopts the technical scheme of:

[0008] The utility model provides a kind of thin film end sag detection device, including film unwinding assembly, support, first distance measuring component, second distance measuring component and calculator;Film unwinding assembly is used to install and place film roll, so that the film roll can be unfolded on horizontal reference surface along its length direction, forming horizontally arranged film to be detected surface;Support is arranged below the film to be detected surface;First distance measuring component is fixedly connected to the support, and is opposite to one end of the width direction of the film to be detected surface;Second distance measuring component is fixedly connected to the support, and is opposite to the other end of the width direction of the film to be detected surface;Calculator is electrically connected to the first distance measuring component and the second distance measuring component;Wherein, the distance between the first distance measuring component and the horizontal reference surface is equal to the distance between the second distance measuring component and the horizontal reference surface.

[0009] Preferably, the film unwinding assembly comprises a placing support, a winding support, a winding roller and a winding motor, the film roll is rotatably connected to the placing support, the winding roller is rotatably connected to the winding support, and the output shaft of the winding motor is connected to the winding roller, wherein the opening end of the film roll is fixedly connected to the winding roller.

[0010] Preferably, the film unwinding assembly further comprises a first lifting assembly and a second lifting assembly, the first lifting assembly is connected to the placing support, and the first lifting assembly can drive the placing support to ascend and descend along the vertical direction; the second lifting assembly is connected to the winding support, and the second lifting assembly can drive the winding support to ascend and descend along the vertical direction.

[0011] Preferably, the first distance measuring assembly comprises at least one laser range finder.

[0012] Preferably, the second distance measuring assembly comprises at least one laser range finder.

[0013] Preferably, the first distance measuring assembly comprises a plurality of laser range finders, and the plurality of laser range finders are arranged at intervals along the length direction of the film to be detected.

[0014] Preferably, the second distance measuring assembly comprises a plurality of laser range finders, and the plurality of laser range finders are arranged at intervals along the length direction of the film to be detected.

[0015] Preferably, the first distance measuring assembly comprises a plurality of laser range finders, and the plurality of laser range finders are arranged at intervals along the length direction of the film to be detected.

[0016] Preferably, the line connecting the fixed position of the first distance measuring assembly and the fixed position of the second distance measuring assembly is perpendicular to the length direction of the film roll.

[0017] (Three) beneficial effects

[0018] The above technical scheme of the utility model has at least the following advantages:

[0019] In the utility model, first distance measuring assembly and second distance measuring assembly are all equipped below the film surface to be detected, the distance between first distance measuring assembly and horizontal reference surface is equal to the distance between second distance measuring assembly and horizontal reference surface, the film unwinding assembly can spread the film roll on the horizontal reference surface along its length direction, and drive the film on the film roll to move along its length direction;First distance measuring assembly is opposite to one end of the film surface to be detected in width direction, first distance measuring assembly can measure the first distance of one end position on the film surface to be detected from horizontal reference surface, second distance measuring assembly can measure the first distance of the other end position on the film surface to be detected from horizontal reference surface, the calculator can calculate first distance and second distance to calculate the maximum, minimum and range of distance, judge whether the data exceeds the specified range of PET film production, to judge whether the position of the film roll in length direction is damaged, whether the defect of the edge of the film roll exists, the distance difference of both sides can also be calculated, whether it conforms to the inspection standard is judged, to facilitate subsequent grade processing of the film roll according to the calculation result. BRIEF DESCRIPTION OF DRAWINGS

[0020] In order to more clearly illustrate the technical scheme in the embodiments of the utility model, the drawings needed to be used in the embodiments will be briefly introduced as follows, obviously, the drawings in the following description are only some embodiments of the utility model, and for those skilled in the art, other drawings can also be obtained without creative labor on the basis of these drawings.

[0021] Figure 1 It is the front view of the film end drop detection device provided by the utility model embodiment.

[0022] Figure 2 It is the top view of the film end drop detection device provided by the utility model embodiment.

[0023] The reference numerals in the drawings are as follows:

[0024] 10, film roll;101, film surface to be detected;1, film unwinding assembly;2, support;3, first distance measuring assembly;4, second distance measuring assembly;5, calculator;11, placing support;12, winding support;13, winding roller;14, winding motor;15, first lifting assembly;16, second lifting assembly. DETAILED DESCRIPTION

[0025] In order to make the technical problems, technical schemes and beneficial effects to be solved by the utility model more clearly, the utility model will be further described in detail in the following with the drawings and embodiments.It should be understood that the specific embodiments described here are only used to explain the utility model, and are not used to limit the utility model.

[0026] It should be noted that when an element is referred to as being "fixed" or "set" on another element, it can be directly on the other element or indirectly on the other element. When an element is referred to as being "connected" to another element, it can be directly connected or indirectly connected to the other element.

[0027] It should be understood that the terms "length", "width", "upper", "lower", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", and the like indicate the orientation or positional relationship based on the orientation or positional relationship shown in the drawings, and are only for the convenience of describing the present application, and do not indicate that the device or element must have a particular orientation, be constructed and operated in a particular orientation, and therefore cannot be understood as limiting the present application.

[0028] In addition, the terms "first", "second" are only for descriptive purposes and cannot be understood as indicating relative importance or indicating the number of technical features. In the description of the present application, the meaning of "multiple" is two or more than two, unless otherwise specifically limited. The specific implementation of the present application is described in more detail below in combination with specific embodiments:

[0029] As shown in Figure 1 and Figure 2 The embodiment of the present application provides a film end sag detection device, which comprises a film unwinding assembly 1, a support 2, a first distance measuring assembly 3, a second distance measuring assembly 4 and a calculator 5; the film unwinding assembly 1 is used for mounting and placing a film roll 10, so that the film roll 10 can be unfolded on a horizontal reference surface along the length direction thereof, forming a horizontally arranged film to be detected surface 101; the support 2 is arranged below the film to be detected surface 101; the first distance measuring assembly 3 is fixedly connected to the support 2 and is opposite to one end of the width direction of the film to be detected surface 101; the second distance measuring assembly 4 is fixedly connected to the support 2 and is opposite to the other end of the width direction of the film to be detected surface 101; the calculator 5 is electrically connected to the first distance measuring assembly 3 and the second distance measuring assembly 4; wherein the distance between the first distance measuring assembly 3 and the horizontal reference surface is equal to the distance between the second distance measuring assembly 4 and the horizontal reference surface.

[0030] In the utility model, first distance measuring assembly 3 and second distance measuring assembly 4 are all arranged below film to be detected surface 101, the distance between first distance measuring assembly 3 and horizontal reference plane is equal to the distance between second distance measuring assembly 4 and horizontal reference plane, film unwinding assembly 1 can spread film roll 10 on horizontal reference plane along its length direction, and drive the film on film roll 10 to move along its length direction;First distance measuring assembly 3 is opposite to one end of film to be detected surface 101 in width direction, first distance measuring assembly 3 can measure the first distance of one end position on film to be detected surface 101 deviating from horizontal reference plane, second distance measuring assembly 4 can measure the first distance of the other end position on film to be detected surface 101 deviating from horizontal reference plane, calculator 5 can calculate first distance and second distance to calculate the maximum value, minimum value and range of distance, judge whether the data exceeds the range stipulated for PET film production, to judge whether the position where film roll is cut in length exists the defect of edge sag, also can calculate the distance difference of two side edges, judge whether it conforms to the inspection standard, to facilitate subsequent grade processing of film roll according to the calculation result. Preferably, the inspection standard is 5mm, that is, the distance of edge sag of film roll can not exceed 5mm, for different film, different width and different customer requirements, the standard can be different, but at most can not exceed 10mm. Specifically, calculator 5 realizes the calculation of the distance of edge sag of one end of film roll according to the following formula: S1=D1-L, wherein S1 is the distance of edge sag of one end of film roll, D1 is the distance between first distance measuring assembly 3 and film to be detected surface 101 measured by first distance measuring assembly 3, and L is the distance between first distance measuring assembly 3 and horizontal reference plane (the value is a fixed value, which can be directly measured when installing first distance measuring assembly 3). Calculator 5 realizes the calculation of the distance of edge sag of the other end of film roll according to the following formula: S2=D2-L, wherein S2 is the distance of edge sag of the other end of film roll, D2 is the distance between second distance measuring assembly 4 and film to be detected surface 101 measured by second distance measuring assembly 4, and L is the distance between second distance measuring assembly 4 and horizontal reference plane (the value is a fixed value, which can be directly measured when installing second distance measuring assembly 4). Film roll 10 can be spread on horizontal reference plane along its length direction, first distance measuring assembly 3 measures each edge of one end of film roll 10 in length direction, and the measured data constitutes a data set, according to the comparison of data in the data set, the maximum value S 1max of edge one end sag can be determined, 1min the minimum value S 1max of edge other end sag can be determined, and the range R1=S 1minMeanwhile, the second distance measuring component 4 measures the length of each side of the other end of the film roll 10, and the measured data forms a data set. By comparing the data in the data set, the maximum sag S of one end of the side can be determined 2max and the minimum sag S of the other end of the side can be determined 2min and the range R2=S 2max -S 2min of the one end of the side can be determined. The difference between the sag of one end of the film roll and the sag of the other end of the film roll, i.e., S1-S2, can be calculated. By comparing S1 and S2 with the threshold 5 mm of the detection standard, it can be determined whether the sag of the side of the film roll meets the detection standard, thereby realizing the judgment of the level of the film roll. The calculator 5 is pre-provided with a program for performing the above calculation steps, which is a prior art known to those skilled in the art, and will not be described here.

[0031] As one of the optional embodiments of the present embodiment, the film unwinding assembly 1 comprises a placing support 11, a winding support 12, a winding roller 13, and a winding motor 14. The film roll 10 is rotationally connected to the placing support 11. The winding roller 13 is rotationally connected to the winding support 12. The output shaft of the winding motor 14 is connected to the winding roller 13. The opening end of the film roll 10 is fixedly connected to the winding roller 13.

[0032] As one of the optional embodiments of the present embodiment, an adhesive part is further provided. The adhesive part adhesively connects the opening end and the winding roller. The opening end is fixedly attached to the winding roller through the adhesive part, which can fix the opening end and facilitate the removal of the opening end from the winding roller.

[0033] As one of the optional embodiments of the present embodiment, the film unwinding assembly 1 further comprises a first lifting assembly 15 and a second lifting assembly 16. The first lifting assembly 15 is connected to the placing support 11 and can drive the placing support 11 to vertically ascend and descend. The second lifting assembly 16 is connected to the winding support 12 and can drive the winding support 12 to vertically ascend and descend. During the measurement, the thickness of the film roll on the placing support 11 is continuously reduced, while the thickness of the film roll on the side of the winding support 12 is continuously increased. The relative height between the placing support 11 and the winding support 12 can be adjusted through the first lifting assembly 15 and the second lifting assembly 16, thereby ensuring that the film to be detected surface 101 can always be on the horizontal reference plane during the detection.

[0034] As one of the optional embodiments of the present embodiment, the first distance measuring component 3 comprises at least one laser distance meter.

[0035] As one of the optional embodiments of the present embodiment, the second distance measuring component 4 comprises at least one laser range finder.

[0036] As one of the optional embodiments of the present embodiment, the first distance measuring component 3 comprises a plurality of laser range finders, which are arranged along the length direction of the film to be detected.

[0037] As one of the optional embodiments of the present embodiment, the second distance measuring component 4 comprises a plurality of laser range finders, which are arranged along the length direction of the film to be detected.

[0038] As one of the optional embodiments of the present embodiment, the line connecting the fixed position of the first distance measuring component 3 and the fixed position of the second distance measuring component 4 is perpendicular to the length direction of the film roll 10.

[0039] The above merely describes the preferred embodiments of the present application and is not intended to limit the present application. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present application shall be included in the protection scope of the present application.

Claims

1. A thin film end sag detection device, characterized in that, include: A film unwinding assembly is used to install and place a film roll so that the film roll can be unwound along its length on a horizontal reference plane to form a horizontally set film surface to be tested. A support is positioned below the surface of the film to be tested; The first ranging component is fixedly connected to the bracket and is positioned opposite one end of the film to be tested in the width direction; The second ranging component is fixedly connected to the bracket and is directly opposite the other end of the film to be detected in the width direction; The calculator is electrically connected to the first ranging component and the second ranging component; The distance between the first ranging component and the horizontal reference plane is equal to the distance between the second ranging component and the horizontal reference plane.

2. The film end sag detection device as described in claim 1, characterized in that, The film unwinding assembly includes a placement bracket, a winding bracket, a winding roller, and a winding motor. The film roll is rotatably connected to the placement bracket, and the winding roller is rotatably connected to the winding bracket. The output shaft of the winding motor is connected to the winding roller, wherein the open end of the film roll is fixedly connected to the winding roller.

3. The film end sag detection device as described in claim 2, characterized in that, It also includes an adhesive portion that adhesively connects the open end to the take-up roller.

4. The film end sag detection device as described in claim 2, characterized in that, The film unwinding assembly further includes a first lifting assembly and a second lifting assembly. The first lifting assembly is connected to the placement bracket and can drive the placement bracket to move up and down in the vertical direction. The second lifting assembly is connected to the winding bracket and can drive the winding bracket to move up and down in the vertical direction.

5. The film end sag detection device as described in claim 1, characterized in that, The first ranging component includes at least one laser rangefinder.

6. The film end sag detection device as described in claim 1, characterized in that, The second ranging component includes at least one laser rangefinder.

7. The film end sag detection device as described in claim 1, characterized in that, The first ranging component includes multiple laser rangefinders, which are arranged at intervals along the length direction of the thin film surface to be tested.

8. The film end sag detection device as described in claim 1, characterized in that, The second ranging component includes multiple laser rangefinders, which are arranged at intervals along the length direction of the thin film surface to be tested.

9. The thin film end sag detection device as described in claim 1, characterized in that, The line connecting the fixed position of the first ranging component and the fixed position of the second ranging component is perpendicular to the length direction of the film roll.

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