CN110412052B - Curved surface hot stamping quality detection method and system - Google Patents
Curved surface hot stamping quality detection method and system Download PDFInfo
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- CN110412052B CN110412052B CN201910741308.4A CN201910741308A CN110412052B CN 110412052 B CN110412052 B CN 110412052B CN 201910741308 A CN201910741308 A CN 201910741308A CN 110412052 B CN110412052 B CN 110412052B
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01B—MEASURING LENGTH, THICKNESS OR SIMILAR LINEAR DIMENSIONS; MEASURING ANGLES; MEASURING AREAS; MEASURING IRREGULARITIES OF SURFACES OR CONTOURS
- G01B11/00—Measuring arrangements characterised by the use of optical techniques
- G01B11/02—Measuring arrangements characterised by the use of optical techniques for measuring length, width or thickness
- G01B11/06—Measuring arrangements characterised by the use of optical techniques for measuring length, width or thickness for measuring thickness ; e.g. of sheet material
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N21/00—Investigating or analysing materials by the use of optical means, i.e. using sub-millimetre waves, infrared, visible or ultraviolet light
- G01N21/84—Systems specially adapted for particular applications
- G01N21/88—Investigating the presence of flaws or contamination
- G01N21/8851—Scan or image signal processing specially adapted therefor, e.g. for scan signal adjustment, for detecting different kinds of defects, for compensating for structures, markings, edges
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N21/00—Investigating or analysing materials by the use of optical means, i.e. using sub-millimetre waves, infrared, visible or ultraviolet light
- G01N21/84—Systems specially adapted for particular applications
- G01N21/88—Investigating the presence of flaws or contamination
- G01N21/95—Investigating the presence of flaws or contamination characterised by the material or shape of the object to be examined
- G01N21/956—Inspecting patterns on the surface of objects
- G01N21/95607—Inspecting patterns on the surface of objects using a comparative method
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01S—RADIO DIRECTION-FINDING; RADIO NAVIGATION; DETERMINING DISTANCE OR VELOCITY BY USE OF RADIO WAVES; LOCATING OR PRESENCE-DETECTING BY USE OF THE REFLECTION OR RERADIATION OF RADIO WAVES; ANALOGOUS ARRANGEMENTS USING OTHER WAVES
- G01S17/00—Systems using the reflection or reradiation of electromagnetic waves other than radio waves, e.g. lidar systems
- G01S17/02—Systems using the reflection of electromagnetic waves other than radio waves
- G01S17/06—Systems determining position data of a target
- G01S17/08—Systems determining position data of a target for measuring distance only
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- G—PHYSICS
- G06—COMPUTING; CALCULATING OR COUNTING
- G06T—IMAGE DATA PROCESSING OR GENERATION, IN GENERAL
- G06T7/00—Image analysis
- G06T7/0002—Inspection of images, e.g. flaw detection
- G06T7/0004—Industrial image inspection
- G06T7/001—Industrial image inspection using an image reference approach
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N21/00—Investigating or analysing materials by the use of optical means, i.e. using sub-millimetre waves, infrared, visible or ultraviolet light
- G01N21/84—Systems specially adapted for particular applications
- G01N21/88—Investigating the presence of flaws or contamination
- G01N21/8851—Scan or image signal processing specially adapted therefor, e.g. for scan signal adjustment, for detecting different kinds of defects, for compensating for structures, markings, edges
- G01N2021/8887—Scan or image signal processing specially adapted therefor, e.g. for scan signal adjustment, for detecting different kinds of defects, for compensating for structures, markings, edges based on image processing techniques
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- G—PHYSICS
- G06—COMPUTING; CALCULATING OR COUNTING
- G06T—IMAGE DATA PROCESSING OR GENERATION, IN GENERAL
- G06T2207/00—Indexing scheme for image analysis or image enhancement
- G06T2207/10—Image acquisition modality
- G06T2207/10004—Still image; Photographic image
- G06T2207/10012—Stereo images
-
- G—PHYSICS
- G06—COMPUTING; CALCULATING OR COUNTING
- G06T—IMAGE DATA PROCESSING OR GENERATION, IN GENERAL
- G06T2207/00—Indexing scheme for image analysis or image enhancement
- G06T2207/30—Subject of image; Context of image processing
- G06T2207/30108—Industrial image inspection
- G06T2207/30144—Printing quality
Abstract
The invention relates to the technical field of hot stamping, and particularly discloses a curved surface hot stamping quality detection method and a curved surface hot stamping quality detection system, wherein the method comprises the following steps: performing thickness detection on the hot-pressed pattern on the thermoplastic film; three-dimensional scanning is carried out on the transfer curved surface and the hot pressing pattern, and a three-dimensional image of the transfer curved surface and the hot pressing pattern is generated according to the three-dimensional scanning result; acquiring the radius and the central angle of the transfer curved surface from the three-dimensional image, and unfolding the transfer curved surface and the hot-pressing pattern into a simulation plane structure according to the radius and the central angle of the transfer curved surface; comparing the hot pressing pattern on the simulation plane structure with the hot pressing pattern on the thermoplastic film; the thickness of the hot-pressing pattern at the position where the dummy planar structure corresponds to the detection point of the thermoplastic film is measured, and the measurement result is compared with the thickness detection result of the thermoplastic film. The invention provides a curved surface hot stamping quality detection method and system, which can realize automatic detection of hot stamping quality, save labor and improve detection precision.
Description
Technical Field
The invention relates to the technical field of hot stamping, in particular to a curved surface hot stamping quality detection method and system.
Background
Hot stamping refers to the operation of applying a cut stamping foil to a desired position on a molded article and pressing the stamping foil against the former by means of a device capable of applying heat and pressure. Depending on the type of embossing foil, a metallic or coloured appearance can be obtained, and the plastic can be metallized. Hot embossing is suitable for shaped articles having a flat surface.
The main process steps of hot stamping are as follows: inserting a sheet of thermoplastic film into a molding machine; the cavity is evacuated and pressed against the membrane by a tool (mold insert) in the cavity provided with the microstructure, the temperature of which has been raised above the softening temperature, so that the mold insert is filled with plastic material and the complete replication of the microstructure is completed; the entire apparatus is then allowed to cool and the mold insert is allowed to detach from the plastic material.
In contrast to injection molding, the polymer flows only a short distance during the transformation from foil membrane to microstructure during hot embossing. Therefore, only a small stress is generated on the polymer, and the molded parts are well suited for optical components such as waveguides and lenses. Hot stamping techniques are particularly suitable for the manufacture of flat panels or foils, since only small amounts of plastic have to be molded in these applications.
The hot pressing temperature, the hot pressing pressure and the hot pressing time all affect the hot pressing quality, and as long as one parameter is not correct, the problems that the imprinted pattern is not completely transferred to the product or is easy to fall off from the product and the like can be caused. At present, the hot pressing quality mainly depends on manual observation, an automatic detection method is not available, when the transfer printing surface of a product is a plane, the manual observation is still insufficient, when the transfer printing surface of the product is a curved surface, for example, when the side surface of a cylindrical product is subjected to hot pressing, a worker needs to change the observation angle back and forth, the imprint pattern on the curved surface is converted into a plane pattern in the mind, and then the plane pattern is compared with the pattern on the thermoplastic film, so that whether the imprint pattern meets the requirement or not is judged, and the operation consumes labor and is easy to make mistakes.
Therefore, a curved surface hot stamping quality detection method is needed, which can realize automatic detection of hot stamping quality, save labor and improve detection precision.
Disclosure of Invention
The invention aims to provide a curved surface hot stamping quality detection method and system, which can realize automatic detection of hot stamping quality, save labor and improve detection precision.
To achieve the above object, in a first aspect, the present invention provides a curved surface hot stamping quality detection method for detecting integrity of a hot stamping pattern transferred from a thermoplastic film onto a transfer curved surface, including:
performing thickness detection on the hot-pressed pattern on the thermoplastic film;
three-dimensional scanning is carried out on the transfer curved surface and the hot pressing pattern, and a three-dimensional image of the transfer curved surface and the hot pressing pattern is generated according to the three-dimensional scanning result;
acquiring the radius and the central angle of the transfer curved surface from the three-dimensional image, and unfolding the transfer curved surface and the hot pressing pattern into a simulation plane structure according to the radius and the central angle of the transfer curved surface;
comparing the hot-pressing pattern on the simulation plane structure with the hot-pressing pattern on the thermoplastic film, and if the similarity of the hot-pressing pattern on the simulation plane structure and the hot-pressing pattern on the thermoplastic film reaches a preset value, the product quality is qualified; otherwise, the product quality is not up;
measuring the thickness of the hot-pressing pattern at the position of the simulation plane structure corresponding to the detection point of the thermoplastic film, and comparing the measurement result with the thickness detection result of the thermoplastic film; if the difference value of the two is within the allowable error range, the product quality is qualified, otherwise, the product quality is not qualified.
Preferably, the thickness detection of the hot-pressed pattern on the thermoplastic film specifically comprises:
and selecting at least two detection points on the hot-pressing pattern, and taking the thickness average value of each detection point as the detection result of the thickness detection.
Preferably, the hot-pressing pattern on the simulation plane structure is compared with the hot-pressing pattern on the thermoplastic film, and if the similarity of the two hot-pressing patterns reaches a preset value, the product quality is qualified; otherwise, the product quality is not up to the standard, and the method further comprises the following steps:
and when the product fails, sending out first warning information.
Preferably, the thickness of the hot-pressing pattern at the position where the simulated planar structure corresponds to the detection point of the thermoplastic film is measured, and the measurement result is compared with the thickness detection result of the thermoplastic film; if the difference value of the two is within the allowable error range, the product quality is qualified, otherwise, the product quality is not qualified, and the method further comprises the following steps:
and when the product fails, sending out second warning information.
Preferably, the first warning information and/or the second warning information may be at least one of a text popup, a voice prompt, a device vibration and a warning light flashing.
Preferably, the first warning information is different from the second warning information.
Preferably, before the thickness detection of the hot-pressed pattern on the thermoplastic film, the method further comprises:
providing a thermoplastic film which is not subjected to hot embossing, and attaching a hot embossing pattern on the thermoplastic film.
In another aspect, the present invention provides a quality inspection system for inspecting integrity of a hot-pressed pattern transferred from a thermoplastic film onto a transfer curved surface, comprising:
the thickness detection device is used for detecting the thickness of the hot-pressed pattern on the thermoplastic film;
the three-dimensional scanning imaging device is used for carrying out three-dimensional scanning on the transfer curved surface and the hot pressing pattern and generating a three-dimensional image of the transfer curved surface and the hot pressing pattern according to the three-dimensional scanning result;
the processing computer is respectively electrically connected with the thickness detection device and the three-dimensional scanning imaging device and is used for acquiring the radius and the central angle of the transfer curved surface from the three-dimensional image and unfolding the transfer curved surface and the hot pressing pattern into a simulation plane structure according to the radius and the central angle of the transfer curved surface; comparing the hot-pressing pattern on the simulation plane structure with the hot-pressing pattern on the thermoplastic film, and if the similarity of the hot-pressing pattern on the simulation plane structure and the hot-pressing pattern on the thermoplastic film reaches a preset value, the product quality is qualified; otherwise, the product quality is not up; measuring the thickness of the hot-pressing pattern at the position of the simulation plane structure corresponding to the detection point of the thermoplastic film, and comparing the measurement result with the thickness detection result of the thermoplastic film; if the difference value of the two is within the allowable error range, the product quality is qualified, otherwise, the product quality is not qualified.
Preferably, the method further comprises the following steps:
and the warning device is connected with the processing computer and is used for sending warning information when the product is detected to be out of order.
Preferably, the method further comprises the following steps:
and the tensioning device is used for providing a thermoplastic film which is not subjected to hot embossing, and a hot embossing pattern is attached to the thermoplastic film.
The invention has the beneficial effects that: the curved surface hot stamping quality detection method and system can realize automatic detection of hot stamping quality, save labor and improve detection precision.
Drawings
In order to more clearly illustrate the technical solutions in the present embodiment or the prior art, the drawings needed to be used in the description of the embodiment or the prior art will be briefly introduced below, and it is obvious that the drawings in the following description are only some embodiments of the present invention, and it is obvious for those skilled in the art to obtain other drawings according to these drawings without inventive labor.
Fig. 1 is a flowchart of a curved surface hot embossing quality detection method according to an embodiment of the present invention;
fig. 2 is a block diagram of a quality detection system according to a second embodiment of the present invention.
In the figure:
1. a tensioning device;
2. a thickness detection device;
3. a three-dimensional scanning imaging device;
4. processing the computer;
5. a warning device;
6. a thermoplastic film; 601. and hot-pressing the pattern.
Detailed Description
In order to make the objects, features and advantages of the present invention more obvious and understandable, the technical solutions in the embodiments will be clearly and completely described below with reference to the drawings in the embodiments, and it is apparent that the embodiments described below are only a part of embodiments of the present invention, and not all embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
Example one
The embodiment provides a curved surface hot stamping quality detection method, which is used for detecting the integrity of a hot stamping pattern transferred from a thermoplastic film to a transfer curved surface, is suitable for application scenes in the field of hot stamping, can realize automatic detection of hot stamping quality, saves manpower and improves detection precision, and is executed by a quality detection system and realized through software and/or hardware.
Fig. 1 is a flowchart of a curved surface hot stamping quality detection method according to a first embodiment of the present invention.
Referring to fig. 1, the method for detecting the hot stamping quality of the curved surface comprises the following steps:
s10: providing a thermoplastic film which is not subjected to hot embossing, and attaching a hot embossing pattern on the thermoplastic film.
S20: the thickness of the hot-pressed pattern on the thermoplastic film was measured.
Specifically, at least two detection points are selected on the hot pressing pattern, and the thickness average value of each detection point is used as the detection result of the thickness detection. Multiple measurements may reduce measurement errors. Preferably, the number of the detection points is 5, each of the four corners is provided, and the center is provided with one detection point.
S30: and carrying out three-dimensional scanning on the transfer curved surface and the hot pressing pattern and generating a three-dimensional image of the transfer curved surface and the hot pressing pattern according to the three-dimensional scanning result.
S40: and acquiring the radius and the central angle of the transfer curved surface from the three-dimensional image, and unfolding the transfer curved surface and the hot pressing pattern into a simulation plane structure according to the radius and the central angle of the transfer curved surface.
It should be noted that, a specific algorithm and a related calculation program for unfolding a curved surface into a plane according to a radius and a central angle belong to the prior art, and are not the key point of this embodiment, and therefore are not described herein again.
S50: comparing the hot-pressing pattern on the simulation plane structure with the hot-pressing pattern on the thermoplastic film, and if the similarity of the hot-pressing pattern on the simulation plane structure and the hot-pressing pattern on the thermoplastic film reaches a preset value, the product quality is qualified; otherwise, the product quality is not good.
Preferably, the comparison in step S50 can be performed by an image recognition technique, wherein the program algorithm capable of performing deep learning can substantially meet the requirement of the industry on the accuracy of the comparison result. Through image comparison, the problems that all or part of the hot-pressed patterns in the horizontal direction are not printed on the curved surface or fall off from the curved surface and the like can be found in time, and the completeness of the pattern transfer printing in the horizontal direction in the hot-pressed printing process is ensured.
S60: measuring the thickness of the hot-pressing pattern at the position of the simulation plane structure corresponding to the detection point of the thermoplastic film, and comparing the measurement result with the thickness detection result of the thermoplastic film; if the difference value of the two is within the allowable error range, the product quality is qualified, otherwise, the product quality is not qualified.
Specifically, through thickness comparison, the problems that all or part of the hot-pressed patterns in the vertical direction are not printed on the curved surface or fall off from the curved surface and the like can be found in time, and the completeness of the pattern transfer printing in the vertical direction in the hot-pressed printing process is ensured.
Preferably, in step S50, when the product fails, a first warning message is issued. In step S60, when the product fails, a second warning message is issued.
In this embodiment, the first warning information and/or the second warning information may be at least one of a text popup, a voice prompt, a device vibration, and a flashing warning light. Further, the first warning information is different from the second warning information.
The curved surface hot-stamping quality detection method provided by the embodiment can be used for curved surface hot-stamping conditions in the technical field of hot stamping, can realize automatic detection of hot-stamping quality, saves manpower and improves detection precision.
Example two
The quality detection system provided by the embodiment of the invention can be used for executing the curved surface hot stamping quality detection method provided by the embodiment of the invention, and has corresponding functions and beneficial effects.
Fig. 2 is a block diagram of a quality detection system provided in the second embodiment.
Referring to fig. 2, a quality detection system includes:
a tensioner 1 for providing a thermoplastic film 6 without hot embossing, the thermoplastic film 6 having a hot embossing pattern 601 affixed thereto;
a thickness detection device 2 for performing thickness detection on the hot-pressed pattern 601 on the thermoplastic film 6;
the three-dimensional scanning imaging device 3 is used for three-dimensionally scanning the transfer curved surface and the hot pressing pattern 601 and generating a three-dimensional image of the transfer curved surface and the hot pressing pattern 601 according to the three-dimensional scanning result;
the processing computer 4 is respectively electrically connected with the thickness detection device 2 and the three-dimensional scanning imaging device 3 and is used for acquiring the radius and the central angle of the transfer curved surface from the three-dimensional image and unfolding the transfer curved surface and the hot pressing pattern 601 into a simulation plane structure according to the radius and the central angle of the transfer curved surface; comparing the hot pressing pattern 601 on the simulation plane structure with the hot pressing pattern 601 on the thermoplastic film 6, wherein if the similarity of the two reaches a preset value, the product quality is qualified; otherwise, the product quality is not up; measuring the thickness of the hot-pressing pattern 601 at the position of the simulated planar structure corresponding to the detection point of the thermoplastic film 6, and comparing the measurement result with the thickness detection result of the thermoplastic film 6; if the difference value of the two is within the allowable error range, the product quality is qualified, otherwise, the product quality is not qualified.
Specifically, the stretching device 1 may be a set of stretching rollers that apply appropriate stretching force to the thermoplastic film 6 from both ends to ensure the flatness of the thermoplastic film 6. The thickness detection device 2 may be a laser range finder or the like with high accuracy. The three-dimensional scanning imaging device 3 generally comprises a plurality of cameras or can be composed of a single camera which can freely move to the positions of all angles of the shot object, and three-dimensional imaging is realized through an image splicing technology. The processing computer 4 can be equipped with three-dimensional imaging software which cooperates with the three-dimensional scanning imaging device 3 and with simulation software for unfolding and measuring curved surfaces.
In this embodiment, the hot-pressing pattern 601 on the simulation planar structure is compared with the hot-pressing pattern 601 on the thermoplastic film 6, and if the similarity between the two patterns reaches a preset value, the product quality is qualified; otherwise, the product quality is not up; and when the product fails, sending out first warning information. Measuring the thickness of the hot-pressing pattern 601 at the position of the simulated planar structure corresponding to the detection point of the thermoplastic film 6, and comparing the measurement result with the thickness detection result of the thermoplastic film 6; and if the difference value of the two is within the allowable error range, the product quality is qualified, otherwise, the product quality is not qualified, and when the product is not qualified, second warning information is sent out.
It should be noted that the warning information may be a text popup and/or a voice reminder, which may be sent by the processing computer 4, that is, the popup appears on the screen of the processing computer 4, and a speaker connected to the processing computer 4 sends a voice reminder.
Of course, the warning information may also be sent by the warning device 5 connected to the processing computer 4. For example, the warning device 5 may be a mobile phone connected to the processing computer 4 in a wireless communication manner, and when the product fails in the hot-pressing pattern 601 comparison detection, the mobile phone sends out a sound prompt of "failing in hot-pressing pattern 601 comparison detection" or a text popup window, or a high-frequency vibration, or a breathing lamp purple light flashing; when the product fails in the thickness comparison detection, the mobile phone sends out a sound prompt of 'failing in thickness comparison detection' or a text popup window, or low-frequency vibration, or blue light flashing of a breathing lamp, for example, the warning device 5 can be a color-changing LED lamp set, and when the product fails in the hot-pressing pattern 601 comparison detection, red light of the LED lamp set flashes at high frequency; when the product fails in the thickness comparison detection, the green light of the LED lamp group flickers at low frequency, and the like
The embodiment provides a quality detection system, can realize the automated inspection of hot pressing quality, uses manpower sparingly and improves and detect the precision.
In the embodiments provided in the present application, it should be understood that the disclosed system, unit, apparatus and method may be implemented in other ways. For example, all the embodiments described above are merely illustrative, and for example, the division of the above units or modules is only one logical function division, and there may be other divisions when the actual implementation is performed, for example, a plurality of units, modules and components may be combined or integrated into another system, or some features may be omitted or not executed. In addition, the shown or discussed mutual coupling or direct coupling or communication connection may be an indirect coupling or communication connection through some interfaces, devices or units, and may be in an electrical, mechanical or other form.
The units described as separate parts may or may not be physically separate, and parts displayed as units may or may not be physical units, may be located in one place, or may be distributed on a plurality of network units. Some or all of the units can be selected according to actual needs to achieve the purpose of the solution of the embodiment.
In addition, functional units in the embodiments of the present application may be integrated into one processing unit, or each unit may exist alone physically, or two or more units are integrated into one unit. The integrated unit can be realized in a form of hardware, and can also be realized in a form of a software functional unit.
The integrated unit, if implemented in the form of a software functional unit and sold or used as a stand-alone product, may be stored in a computer readable storage medium. Based on such understanding, the technical solution of the present application may be substantially implemented or contributed to by the prior art, or all or part of the technical solution may be embodied in a software product, which is stored in a computer-readable storage medium and includes instructions for causing a terminal device (which may be a mobile phone, a notebook, or other electronic device) to perform all or part of the steps of the method according to the embodiments of the present application. And the aforementioned storage medium includes: a U-disk, a removable hard disk, a Read-Only Memory (ROM), a Random Access Memory (RAM), a magnetic disk or an optical disk, and other various media capable of storing program codes.
The above examples are only intended to illustrate the technical solution of the present invention, but not to limit it; although the present invention has been described in detail with reference to the foregoing embodiments, it will be understood by those of ordinary skill in the art that: the technical solutions described in the foregoing embodiments may still be modified, or some technical features may be equivalently replaced; and such modifications or substitutions do not depart from the spirit and scope of the corresponding technical solutions of the embodiments of the present invention.
Claims (5)
1. A curved surface hot stamping quality detection method is used for detecting the integrity of a hot stamping pattern transferred from a thermoplastic film to a transfer curved surface, and is characterized by comprising the following steps:
performing thickness detection on the hot-pressed pattern on the thermoplastic film;
three-dimensional scanning is carried out on the transfer curved surface and the hot pressing pattern, and a three-dimensional image of the transfer curved surface and the hot pressing pattern is generated according to the three-dimensional scanning result;
acquiring the radius and the central angle of the transfer curved surface from the three-dimensional image, and unfolding the transfer curved surface and the hot pressing pattern into a simulation plane structure according to the radius and the central angle of the transfer curved surface;
comparing the hot-pressing pattern on the simulation plane structure with the hot-pressing pattern on the thermoplastic film, and if the similarity of the hot-pressing pattern on the simulation plane structure and the hot-pressing pattern on the thermoplastic film reaches a preset value, the product quality is qualified; otherwise, the product quality is not up; when the product fails, sending first warning information;
measuring the thickness of the hot-pressing pattern at the position of the simulation plane structure corresponding to the detection point of the thermoplastic film, and comparing the measurement result with the thickness detection result of the thermoplastic film; if the difference value of the two is within the allowable error range, the product quality is qualified, otherwise, the product quality is not qualified; when the product fails, sending out second warning information;
the thickness detection of the hot-pressed pattern on the thermoplastic film specifically comprises the following steps:
selecting at least two detection points on the hot-pressed pattern, and taking the thickness average value of each detection point as a detection result of thickness detection;
the first warning information is different from the second warning information.
2. The curved surface hot embossing quality detection method as claimed in claim 1, wherein the first warning information and/or the second warning information may be at least one of a text popup, a voice prompt, a device vibration and a warning light flashing.
3. The curved surface hot embossing quality detection method according to claim 1, before performing thickness detection on the hot embossing pattern on the thermoplastic film, further comprising:
providing a thermoplastic film which is not subjected to hot embossing, and attaching a hot embossing pattern on the thermoplastic film.
4. A quality inspection system for performing the curved surface hot embossing quality inspection method according to any one of claims 1 to 3, for inspecting the integrity of a hot embossing pattern transferred from a thermoplastic film onto a transfer curved surface, comprising:
the thickness detection device is used for detecting the thickness of the hot-pressed pattern on the thermoplastic film;
the three-dimensional scanning imaging device is used for carrying out three-dimensional scanning on the transfer curved surface and the hot pressing pattern and generating a three-dimensional image of the transfer curved surface and the hot pressing pattern according to the three-dimensional scanning result;
the processing computer is respectively electrically connected with the thickness detection device and the three-dimensional scanning imaging device and is used for acquiring the radius and the central angle of the transfer curved surface from the three-dimensional image and unfolding the transfer curved surface and the hot pressing pattern into a simulation plane structure according to the radius and the central angle of the transfer curved surface; comparing the hot-pressing pattern on the simulation plane structure with the hot-pressing pattern on the thermoplastic film, and if the similarity of the hot-pressing pattern on the simulation plane structure and the hot-pressing pattern on the thermoplastic film reaches a preset value, the product quality is qualified; otherwise, the product quality is not up; measuring the thickness of the hot-pressing pattern at the position of the simulation plane structure corresponding to the detection point of the thermoplastic film, and comparing the measurement result with the thickness detection result of the thermoplastic film; if the difference value of the two is within the allowable error range, the product quality is qualified, otherwise, the product quality is not qualified;
and the warning device is connected with the processing computer and is used for sending warning information when the product is detected to be out of order.
5. The quality detection system of claim 4, further comprising:
and the tensioning device is used for providing a thermoplastic film which is not subjected to hot embossing, and a hot embossing pattern is attached to the thermoplastic film.
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| CN112649447A (en) * | 2020-12-30 | 2021-04-13 | 浙江久大纺织科技有限公司 | Fabric printing detection method based on color matrix |
| CN113588672A (en) * | 2021-09-29 | 2021-11-02 | 武汉绿色塑料包装有限公司 | Quality detection method for plastic product |
| CN115684206B (en) * | 2022-09-27 | 2023-04-21 | 江阴旺达商务贴有限公司 | Multi-azimuth electrostatic sticker quality identification device |
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