A method for accurate positioning and alignment of cold foil lamination
By using the photoelectric sensor and laser sensor of the positioning roller device in the cold iron composite machine to detect the black and white stripes and detection notches of the transfer film and substrate, the accurate positioning and alignment of the two is achieved, and the unstable alignment accuracy in the prior art is solved The problem of improving the pattern alignment accuracy during the compounding process.
Patent Information
- Application Number
- CN202411149053.X
- Authority / Receiving Office
- CN · China
- Patent Type
- Patents(China)
- Current Assignee / Owner
- Filing Date
- 2024-08-21
- Publication Date
- 2024-12-20
- Estimated Expiration
- 2044-08-21
AI Technical Summary
In cold ironing processing, it is difficult for the prior art to achieve accurate alignment of the electrochemical aluminum film and the printing material pattern. The commonly used color mark positioning methods are unstable in accuracy, and the problem of fine movements leading to failure of alignment is prone to occur.
The positioning roller device is adopted, including the upper positioning roller and the lower positioning roller, and both are equipped with photoelectric sensors and laser sensors. By detecting the black and white stripes and detecting notches on the transfer film and substrate, the relative positions of the two are accurately detected and fine-tuned to ensure that the Accurate alignment.
The accuracy of the alignment of the transfer film and the substrate pattern is improved to ensure the pattern transfer effect during the compounding process.
Smart Images
Figure CN118650970B_ABST
Abstract
Description
Technical Field
[0001] The invention relates to the technical field of cold-ironing equipment, and in particular to an accurate positioning and alignment method for cold-ironing lamination. Background Art
[0002] Cold stamping is a printing technology that uses a relatively low temperature to laminate an anodized aluminum film onto a substrate by pressing. During the cold stamping process, in order to improve the aesthetics of the anodized aluminum part laminated onto the substrate, a corresponding pattern is set on the anodized aluminum film. During the cold stamping process, the pattern on the anodized aluminum film needs to be accurately aligned with the pattern on the substrate so that the pattern on the anodized aluminum film can be accurately transferred and laminated onto the corresponding pattern on the substrate. The commonly used method is to set a color mark at the edge blank of the anodized aluminum film and the substrate and combine it with a photoelectric sensor for position detection. The positioning and alignment of the anodized aluminum film and the pattern on the substrate are achieved by positioning the position of the color mark. However, the positioning and alignment accuracy of the color mark is not very stable. It is easy to have a problem that the anodized aluminum film or the substrate moves slightly forward and backward after the color mark is detected, but the color mark can still be detected, resulting in the problem that the pattern on the anodized aluminum film cannot be accurately aligned with the pattern on the substrate. Summary of the invention
[0003] The object of the present invention is to provide an accurate positioning and alignment method for cold foil lamination, which can realize accurate positioning and alignment of a transfer film and a substrate so that the patterns of the two can be accurately laminated.
[0004] To achieve the above-mentioned purpose, the present invention adopts the following technical scheme: an accurate positioning and alignment method for cold foil lamination, wherein a positioning roller device is arranged in the upward direction of a pressing and laminating device of a cold foil lamination machine to position, detect and align the transfer film and the substrate, wherein the positioning roller device comprises an upper positioning roller and a lower positioning roller arranged opposite to each other, the upper positioning roller and the lower positioning roller both comprise a rotating part and a fixed part arranged on the side of the rotating part, the rotating part of the upper positioning roller tensions the transfer film, the rotating part of the lower positioning roller is arranged under the substrate to support the substrate, photoelectric sensors are arranged on the fixed parts of the upper positioning roller and the lower positioning roller, and the edges of the transfer film and the substrate are aligned in the corresponding The positions of the positioning detection sensors are provided with black and white stripes. The photoelectric sensors of the upper positioning roller and the lower positioning roller detect the black and white stripes on the transfer film and the substrate respectively. The photoelectric sensors can receive the reflected light signals only when they are aligned with the white stripes. When the transfer film and the substrate move forward, the black and white stripes thereon are detected by the photoelectric sensors. The positions of the transfer film and the substrate can be determined by the number of times the photoelectric sensors receive the light signals. By controlling the forward moving distance of the transfer film and the substrate, the transfer film and the substrate can be accurately aligned. The aligned transfer film and substrate pass through the positioning roller device and then enter the pressing and compounding device for transfer and compounding.
[0005] Specifically, a detection notch is provided at the edge of the transfer film and the substrate in the upward direction of the black and white stripes, and correspondingly, laser sensors are provided on the fixed parts of the upper positioning roller and the lower positioning roller to detect the detection notch. When the transfer film and the substrate move forward, the black and white stripes thereon are first detected by the photoelectric sensor. After the photoelectric sensor detects the last light signal, the transfer film and the substrate continue to move forward at the same speed, so that the detection notch thereon is detected by the laser sensor, and the staggered distance between the transfer film and the substrate is detected and calculated by the time when the laser sensor detects the laser, and the relative position of the transfer film and the substrate is fine-tuned and aligned according to the staggered distance between the transfer film and the substrate, and finally the aligned transfer film and substrate enter the pressing and compounding device for transfer and compounding.
[0006] Specifically, the length of the detection gap on the transfer film and the substrate is L, the time when the laser sensor detects the laser is t, the speed at which the transfer film and the substrate move forward is v, and the offset distance between the transfer film and the substrate is (Lv*t) / 2. The time when the last light signal detected by the photoelectric sensors of the upper positioning roller and the lower positioning roller disappears is used to determine whether the transfer film is ahead of or behind the substrate.
[0007] The beneficial effects of the present invention are as follows: by setting a positioning roller device, the black and white stripes on the edges of the transfer film and the substrate are detected by using a photoelectric sensor arranged on the fixed part on the side of the rotating part, so as to realize the positioning and alignment of the transfer film and the substrate, and in conjunction with a laser sensor and the detection notches on the edges of the transfer film and the substrate, the relative displacement between the transfer film and the substrate is accurately detected and the positions of the two are fine-tuned, thereby improving the accuracy of the alignment of the transfer film and the substrate. BRIEF DESCRIPTION OF THE DRAWINGS
[0008] Attached Figure 1 It is a structural schematic diagram of a method for accurate positioning and alignment of cold foil lamination in an embodiment when it is implemented on a cold foil lamination machine;
[0009] Attached Figure 2 For attachment Figure 1 A partial enlarged view of the middle A part;
[0010] Attached Figure 3 It is a front cross-sectional view of the positioning roller device in the embodiment. DETAILED DESCRIPTION
[0011] Embodiment 1, referring to the figure, a method for accurate positioning and alignment of cold foil lamination is provided, wherein a positioning roller device 2 is provided in the upward direction of a pressing and laminating device 1 of a cold foil lamination machine to perform positioning detection and alignment of a transfer film 10 and a substrate 20, wherein the positioning roller device 2 comprises an upper positioning roller 21 and a lower positioning roller 22 which are arranged opposite to each other, wherein the upper positioning roller 21 and the lower positioning roller 22 both comprise a rotating part 23 and a fixing part 24 which is arranged on the side of the rotating part, wherein the rotating part 23 of the upper positioning roller 21 tensions the transfer film 10, and the rotating part 23 of the lower positioning roller 22 is arranged below the substrate 20 to support the substrate 20, and the fixing parts 24 of the upper positioning roller 21 and the lower positioning roller 22 are both provided with photoelectric sensors 25, and the edges of the transfer film 10 and the substrate 20 are aligned at the corresponding photoelectric sensors. The positions of the devices 25 are all provided with black and white stripes 3. The photoelectric sensors 25 of the upper positioning roller 21 and the lower positioning roller 22 detect the black and white stripes 3 on the transfer film 10 and the substrate 20 respectively. The photoelectric sensors 25 can receive the reflected light signals only when they are aligned with the white stripes. When the transfer film 10 and the substrate 20 move forward, the black and white stripes 3 thereon are detected by the photoelectric sensors 25. The positions of the transfer film 10 and the substrate 20 can be determined by the number of times the photoelectric sensors 25 receive the light signals. By controlling the forward moving distance of the transfer film 10 and the substrate 20, the transfer film 10 and the substrate 20 can be accurately aligned. After the aligned transfer film 10 and the substrate 20 pass through the positioning roller device 2, they enter the pressing compounding device 1 for transfer compounding.
[0012] Specifically, at the edges of the transfer film 10 and the substrate 20, a detection notch 4 is provided in the upward direction of the black and white stripes 3. Correspondingly, a laser sensor 5 is provided on the fixing portion 24 of the upper positioning roller 21 and the lower positioning roller 22 to detect the detection notch 4. When the transfer film 10 and the substrate 20 move forward, the black and white stripes 3 thereon are first detected by the photoelectric sensor 25. After the photoelectric sensor 25 detects the last light signal, the transfer film 10 and the substrate 20 continue to move forward at the same speed, so that the detection notch 4 thereon is detected by the laser sensor 5. The staggered distance between the transfer film 10 and the substrate 20 is detected and calculated by the time when the laser sensor 5 detects the laser. The relative positions of the transfer film 10 and the substrate 20 are fine-tuned and aligned according to the staggered distance between the transfer film 10 and the substrate 20. Finally, the aligned transfer film 10 and the substrate 20 enter the pressing and compounding device 1 for transfer and compounding.
[0013] Specifically, when the offset distance between the transfer film 10 and the substrate 20 is detected and calculated by the time when the laser sensor 5 detects the laser, the following method is used for calculation: the length of the detection notch 4 on the transfer film 10 and the substrate 20 is L, the time when the laser sensor 5 detects the laser is t, the forward moving speed of the transfer film 10 and the substrate 20 is v, then the offset distance between the transfer film 10 and the substrate 20 is (Lv*t) / 2, and the time when the last light signal detected by the photoelectric sensor 25 of the upper positioning roller 21 and the lower positioning roller 22 disappears is used to determine whether the transfer film 10 is ahead of or behind the substrate 20. When the time when the last light signal detected by the photoelectric sensor 25 of the upper positioning roller 21 disappears is earlier than the time when the last light signal detected by the photoelectric sensor 25 of the lower positioning roller 22 disappears, the transfer film 10 is ahead of the substrate 20, otherwise it lags behind the substrate 20. By determining the relative displacement between the transfer film 10 and the substrate 20, the position between the transfer film 10 and the substrate 20 can be fine-tuned by controlling the transmission of the transfer film 10 and the substrate 20, thereby improving the accuracy of the alignment between the two.
[0014] Of course, the above are only preferred embodiments of the present invention, and are not intended to limit the scope of use of the present invention. Therefore, any equivalent changes made to the principles of the present invention should be included in the protection scope of the present invention.
Claims
1. A method for accurate positioning and alignment of cold-iron lamination, characterized in that: A positioning roller device is arranged in the upward direction of the pressing and compounding device of the cold foil laminating machine to perform positioning, detection and alignment of the transfer film and the substrate, wherein the positioning roller device comprises an upper positioning roller and a lower positioning roller arranged relatively to each other, and the upper positioning roller and the lower positioning roller both comprise a rotating part and a fixed part arranged on the side of the rotating part, the rotating part of the upper positioning roller tensions the transfer film, and the rotating part of the lower positioning roller is arranged under the substrate to support the substrate, and photoelectric sensors are arranged on the fixed parts of the upper positioning roller and the lower positioning roller, and black and white stripes are arranged on the edges of the transfer film and the substrate at the positions corresponding to the positioning detection sensors, and the photoelectric sensors of the upper positioning roller and the lower positioning roller respectively detect the black and white stripes on the transfer film and the substrate, and the photoelectric sensors can receive reflected light signals only when they are aligned with the white stripes, and the black and white stripes on the transfer film and the substrate are detected by the photoelectric sensors when the transfer film and the substrate move forward, and the number of times the photoelectric sensors receive the light signals can determine the transfer The positions of the printing film and the substrate can be accurately aligned with the substrate by controlling the distance they move forward; at the same time, detection notches are provided at the edges of the transfer film and the substrate in the upward direction of the black and white stripes, and correspondingly, laser sensors are provided on the fixed parts of the upper positioning roller and the lower positioning roller to detect the detection notches. When the transfer film and the substrate move forward, the black and white stripes thereon are first detected by the photoelectric sensor. After the photoelectric sensor detects the last light signal, the transfer film and the substrate continue to move forward at the same speed, so that the detection notches thereon are detected by the laser sensor, and the staggered distance between the transfer film and the substrate is detected and calculated by the time when the laser sensor detects the laser, and the relative positions of the transfer film and the substrate are fine-tuned and aligned according to the staggered distance between the transfer film and the substrate, and finally the aligned transfer film and substrate enter the pressing and compounding device for transfer and compounding.
2. The accurate positioning and alignment method for cold stamping and lamination according to claim 1, characterized in that: The length of the detection gap on the transfer film and the substrate is L, the time when the laser sensor detects the laser is t, the speed at which the transfer film and the substrate move forward is v, and the offset distance between the transfer film and the substrate is (Lv*t) / 2. The time when the last light signal detected by the photoelectric sensors of the upper positioning roller and the lower positioning roller disappears is used to determine whether the transfer film is ahead of or behind the substrate.