TWI665097B - Calibration method of pad printing machine - Google Patents

Abstract

The invention relates to a method for correcting a printing machine. The conveying device of the printing device drives the printing device to move toward the correcting device of the correcting device, so that at least one printing head made of an elastic material is pressed against the correcting device. On the surface of the inspection platform, the print head is deformed due to extrusion. At this time, the correction detector of the correction device will sense the contour of the print head after deformation, and the processing module is electrically connected through the correction detector. To calculate the position of at least one correction point of the contour. Since the correction detector senses the contour after extrusion, it can conform to the actual use state for subsequent use and can be accurately aligned, which can reduce the use of the print head. To reduce the waste of materials, in order to achieve the goal of improving product yield and reducing manufacturing costs.

Description

Calibration method of pad printing machine

The invention provides a method for correcting a pad printing machine, in particular, an elastic printing head of a printing device is pressed against a detection platform of the correction device to generate deformation, and a correction detector of the correction device is used to sense the deformed contour, and then borrowed The processing module finds the correction point in the contour. This correction point is in line with the actual use state and is used for accurate alignment, which can improve product yield.

According to presses, printing technology is often used in various fields in daily life. With the rapid development of technology, the accuracy and vividness of its printing technology have also shown a high standard and diversified trend. Furthermore, there is a type of pad printing in printing technology. Technology, the principle of its pad printing technology is to first use a steel plate to make a pattern with a concave pattern, add ink to the concave pattern, and then use a flexible printing head (such as: silicone print head) to get ink, And through the print head transfer to the product to be printed, so that the product is printed with a pattern.

In addition, the elastic print head is flexible, so it can be freely changed according to the shape of the product, so that it can be accurately applied to the product, and thus has a good printing effect. However, when the print head is formed, it is usually The shape is formed by the injection molding of the mold, so that the formed printing head will produce some errors, and because the pad printing technology needs to use the printing head to pick up the ink on the steel plate, and then transfer the ink to the product through the printing head. Therefore, the print head needs to undergo the processes of squeezing and squeezing, and therefore, the print head needs to be refined in the foregoing steps. Only accurate alignment can make the product accurately print the pattern, and the error generated by the print head production will affect the accuracy of the pattern printing.

Therefore, generally, the printing machine will install a CCD lens on the print head, steel plate and product. You can use the CCD lens to set the registration point on the steel plate and product, and then set the registration on the unpressed print head through the CCD lens. Point to use the registration point on the print head to set the registration point on the steel plate and the product to perform the printing operation, and when another print head is replaced and an error occurs, the robot arm that moves the print head can be corrected. Operation, so that the alignment point on the print head can be accurately positioned on the alignment point set on the steel plate and the product, thereby improving the printing accuracy.

However, since the print head is extruded when printing on steel plates or products, however, the deformation of the print head before and after extrusion will be slightly different, so that through the aforementioned correction method In actual operation, there will be some errors. Under the trend of more and more precise and accurate printing, the accuracy of printing must also be calculated.

Therefore, how to solve the above-mentioned shortcomings and inconveniences is the direction that relevant industry operators are eager to study and improve.

Therefore, in view of the above-mentioned problems and deficiencies, the inventor collected relevant information, evaluated and considered from various parties, and based on years of experience accumulated in this industry, and continued to make trials and modifications, he began to design such pad printing machines. The invention of the correction method was born.

The main purpose of the present invention is that the conveying device of the printing equipment drives the printing device to be displaced toward the correction device of the correction device, so that the printing device has at least one elastic material. The finished print head is pressed on the surface of the detection platform of the correction device, thereby deforming the print head due to the extrusion. At this time, the correction detector of the correction device will sense the contour of the print head after deformation and transmit The processing module electrically connected to the calibration detector calculates the position of at least one calibration point of the contour. Since the calibration detector senses the compressed contour, it can accurately conform to the actual use state, and this calibration point can be used To accurately correct the path of the printing head conveyed by the conveying device for subsequent use, it can be accurately aligned, which can reduce the error during the use of the printing head, thereby reducing the waste of materials such as ink and molds, in order to improve product yield and reduce manufacturing The purpose of cost.

The secondary purpose of the present invention is that the elastic printing head of the printing device is pressed against the surface of the detection platform of the calibration device to produce deformation, and the printing head can be tested for hardening, cracking or other defects of the material itself at the same time to achieve Avoid the use of defective print heads.

Another object of the present invention is that the detection platform of the calibration device is transparent, and the calibration detector is installed inside the calibration device. When the elastic printing head of the printing device is pressed against the surface of the detection platform, deformation occurs, The correction detector can directly perform the sensing operation on the detection platform to most accurately sense the contour of the print head after squeezing, thereby improving the accuracy of obtaining at least one correction point, thereby achieving the purpose of reducing errors.

Another object of the present invention is that the detection platform of the calibration device is made of glass material with high light transmittance and high hardness. When the print head is pressed on the surface of the detection platform, the high hardness detection platform is not easy. Due to the deformation, and the glass has high light transmittance, when the calibration detector performs the sensing operation on the detection platform, the sensing image is the clearest, so that the calibration detector can clearly detect the pressure of the print head. Contour, thereby achieving the purpose of improving the accuracy of at least one correction point.

1‧‧‧Printing Equipment

11‧‧‧ Conveying device

111‧‧‧First slip track

112‧‧‧The first sliding seat

113‧‧‧Second glide track

114‧‧‧Second sliding seat

115‧‧‧ third slip track

116‧‧‧The third sliding seat

1161‧‧‧cross bar

12‧‧‧Printing Device

121‧‧‧Print head

1211‧‧‧ contour

2‧‧‧ Calibration Equipment

21‧‧‧correction device

211‧‧‧testing platform

212‧‧‧calibration detector

22‧‧‧Processing Module

221‧‧‧display interface

23‧‧‧Testing equipment

231‧‧‧Stents

2311‧‧‧Board

232‧‧‧first detector

233‧‧‧Second detector

3‧‧‧Ink drawing area

31‧‧‧Inking platform

311‧‧‧ ink pattern

32‧‧‧ transport device

321‧‧‧rail

4‧‧‧printing area

41‧‧‧Printing Platform

5‧‧‧Printed

The first figure is a flowchart of the present invention.

The second figure is a block diagram of the present invention.

The third figure is a three-dimensional appearance view of the present invention.

The fourth figure is a partially enlarged front view of the printing head of the present invention squeezed in front of the detection platform.

The fifth figure is a schematic partial enlarged front view of the printing head of the present invention when it is pressed against the detection platform.

The sixth diagram is a schematic diagram of the display interface display correction detector sensing the print head pressing on the detection platform.

The seventh figure is a three-dimensional appearance view of the printing head of the present invention squeezed in front of the ink taking platform.

The eighth figure is a three-dimensional appearance view of the printing head of the present invention when it is pressed against the ink taking platform.

The ninth figure is a schematic diagram of the display interface displaying the ink detection platform detected by the first detector.

The tenth figure is a three-dimensional appearance view of the printing head of the present invention pressed in front of the printing platform.

The eleventh figure is a three-dimensional appearance view of the printing head of the present invention when it is pressed against a printing platform.

The twelfth figure is a schematic view of the display interface displaying the second detector sensing printing platform of the present invention.

In order to achieve the above-mentioned objects and effects, the technical means and structure adopted by the present invention, the following is a detailed description of the features and functions of the preferred embodiment of the present invention.

Please refer to the first to twelfth figures, which are flowcharts, block diagrams, three-dimensional appearance diagrams, a partial enlarged front view of the printing head before being pressed on the detection platform, and a partial view of the printing head when being pressed on the detection platform. Enlarged front view diagram, display interface, display, calibration detector, sensor printing Schematic diagram of the head pressed on the detection platform, the three-dimensional appearance of the printing head before the ink-receiving platform, the three-dimensional appearance of the printing head when it is pressed on the ink-receiving platform, and the display interface showing Schematic diagram, three-dimensional appearance of the printing head before the printing platform, three-dimensional appearance of the printing head when it is pressed against the printing platform, and the display interface shows the schematic diagram of the second detector sensing the printing platform. The printing machine table of the present invention includes a printing device 1, a calibration device 2, an ink taking area 3, and a printing area 4, wherein: the printing device 1 is provided with a conveying device 11 capable of carrying out longitudinal, lateral, front and rear conveying operations. The conveying device 11 is provided with a first sliding track 111 in the front and rear directions, and a first sliding seat 112 capable of sliding back and forth is mounted on the first sliding track 111, and the first sliding A second sliding track 113 is horizontally mounted on the moving base 112, and a second sliding base 114 capable of laterally reciprocating sliding movement is mounted on the second sliding track 113, and the second sliding base 114 is longitudinally mounted. A third sliding track 115 is provided, and the third sliding track 115 A third sliding base 116 capable of longitudinally reciprocating sliding movement is provided, and a cross bar 1161 extending outward is provided on one side of the third sliding base 116, and a printing is installed below one end of the cross bar 1161. Device 12, and the printing device 12 has at least one printing head 121 made of an elastic material (such as rubber, silicone, or plastic).

The calibration device 2 is installed at one side of the printing device 1 and has a calibration device 21. A transparent detection platform 211 is provided on the surface of the calibration device 21, and a calibration platform 21 is provided inside the calibration device 21 to carry out the detection platform 211. The calibration detector 212 for the detection operation, and the calibration detector 212 is electrically connected with a processing module 22 capable of driving the conveying device 11, and one side of the processing module 22 is electrically connected with a display calibration detector 212 for sensing. A display interface 221 (such as a screen) of the screen; in addition, the calibration device 2 further includes The testing device 23 is provided with an upright bracket 231, and a horizontal plate 2311 is arranged above the bracket 231, and the plate 2311 is provided with first detectors 232 spaced a distance apart. And the second detector 233, the first detector 232 and the second detector 233 are also electrically connected to the processing module 22, and the display interface 221 can also be used to display the first detector 232 and the second detector 233 detected pictures.

The ink-receiving area 3 has an ink-receiving platform 31 installed at one side of the printing device 1 and positioned below the first detector 232. An ink pattern 311 is attached to the surface of the ink-receiving platform 31. A transportation device 32 electrically connected to the processing module 22 is installed below the ink platform 31, and the transportation device 32 is provided with guide rails 321 in the front and rear directions. The ink taking platform 31 can be performed on the guide rail 321 of the transportation device 32. Back and forth sliding motion.

On the surface of the printing area 4, a printing platform 41 installed on one side of the printing device 1 is provided, and a second detector 233 of the detecting device 23 is positioned above the printing platform 41.

How the conveying device 11 of the printing device 1 and the transporting device 32 of the ink taking area 3 drive the first sliding base 112, the second sliding base 114, the third sliding base 116, and the ink taking platform 31 respectively at the first sliding position The reciprocating sliding displacement of the track 111, the second sliding track 113, the third sliding track 115, and the guide rail 321 of the transport device 32 is a conventional technical field, and the structure and drive of the transport device 11 and the transport device 32 are related. There are many design methods, so the internal electronic parts and circuit design will not be repeated here. All other equivalent changes and modifications without departing from the spirit of the technology disclosed in the present invention shall be included in the scope of patents covered by the present invention. in.

Furthermore, the detection platform 211 of the calibration device 21 may be glass, transparent The surface is made of acrylic plate or other light-transmissive material, but glass material is preferred. It has high light transmittance and high hardness, which can reduce the deformation caused by compression.

In addition, the calibration detector 212 of the correction device 21, the first detector 232, and the second detector 233 of the detection device 23 may be CCD lenses, CMOS lenses, or other types of detectors.

However, the ink taking platform 31 in the ink taking area 3 may be a steel plate, a glass plate, an acrylic plate, or a plate made of other materials, and the printing platform 41 in the printing area 4 may be a steel plate, an acrylic plate, or other materials. Plates or molds made of materials.

When the present invention is used, it can be executed according to the following steps:

(A) The conveying device 11 of the printing device 1 drives the printing device 12 toward the correction device 21 of the correction device 2 so that at least one printing head 121 made of an elastic material of the printing device 12 is pressed against the detection of the correction device 21 On the surface of the stage 211, the print head 121 is deformed by the pressing.

(B) The correction device 21 uses the correction detector 212 to sense the contour 1211 of the print head 121 after deformation, and calculates at least one correction point a of the contour 1211 through the processing module 22 electrically connected to the correction detector 212. Position to complete the operation of obtaining the calibration point.

In the above step (A), the conveying device 11 of the printing equipment 1 can use the first sliding base 112, the second sliding base 114, and the third sliding base 116 on the first sliding rail 111 and the second sliding rail. 113 and the third sliding track 115 perform a reciprocating sliding movement, so that the printing head 121 of the printing device 12 is pressed toward the detection platform 211 of the calibration device 21.

Furthermore, the deformed outline 1211 of the print head 121 in the above step (B) may be circular, square, oval, or other shapes, and the correction point a is preferably the center point position to have better accuracy, but In practical applications, the correction point a may be a complex point or other points on the contour 1211 that can be used for correction.

However, if the deformed contour 1211 of the print head 121 in the above step (B) is circular, the processing module 22 of the correction device 2 can measure the circle of the contour 1211 by using the true circle measurement method. Outer diameter, and then find the correction point a, and if the correction point a to be found is the center point position, it can be compared with the center point position through the preset contour and the preset center point built in the processing module 22 Correct the point a, or use orthogonal methods (that is, draw at least two distinct vertical triangles in a circle, and the intersection of the two hypotenuses is the center point of the circle), the method of finding the center point of the triangle, etc. to find the position of the center point. Correction point a. However, there are many ways to find the center point of the circular contour 1211. Therefore, any method that can achieve the aforementioned effects should be covered by the present invention, and should be included in the scope of the patent of the present invention for the same reason. Chen Ming.

In addition, the processing module 22 of the calibration device 2 in the above step (B) is electrically connected with the display interface 221, and the display interface 221 can be used to display the sensing screen of the calibration detector 212.

And after obtaining at least one correction point a in step (B), it can be performed according to the following steps:

(C) The conveying device 11 of the printing device 1 will convey the printing head 121 of the printing device 12 to the ink taking platform 31 of the ink taking area 3 with preset parameters, and the printing head 121 and the printing head 121 will be conveyed through the conveying device 11 The ink-receiving platform 31 is brought into contact to pick up the ink pattern 311 on the surface of the ink-receiving platform 31.

(D) The conveying device 11 is used to convey the printing head 121 of the printing device 12 to the printing platform 41 of the printing area 4, and the conveying device 11 is used to bring the printing head 121 into contact with the printing platform 41, thereby printing the The ink pattern 311 adhered to the head 121 is transferred to the printed matter 5 on the printing platform 41.

Before the above step (C) is performed, the detection device 23 of the correction device 2 can be used to sense the ink pattern 311 of the ink platform 31 and the printed matter 5 on the printing platform 41 to pass through the first detection of the detection device 23 The detector 232 and the second detector 233 respectively sense at least one correction point b (as shown in the ninth figure) on the ink pattern 311 and at least one correction point c (as shown in the twelfth figure) on the printed matter 5. ), When the print head 121 is performed in step (C), the at least one correction point a can be located at the position of the at least one correction point b to accurately pick up the ink pattern 311, and when the print head 121 is performed in step (D ), The pair of at least one correction point a can be located at the position of at least one correction point c, so that the ink pattern 311 can be accurately printed on the object 5.

Furthermore, the preset parameter of the conveying device 11 of the printing device 1 in the step (C) may be the distance of the moving path or the pressing force, etc., and when the distance between the at least one correction point a and the at least one correction point b is changed. The conveying device 11 then adjusts the distance of the moving path so that the at least one correction point a can be accurately aligned with the at least one correction point b.

In addition, the method for adjusting the moving path distance of the conveying device 11 of the printing device 1 is preferably calculated by using the processing module 22 of the correction device 2 and using the processing module 22 to automatically drive the conveying device 11 to adjust the moving path distance value. It has the function of automatic alignment, but in practical application, the conveying device 11 of the printing equipment 1 can also adjust the distance value of the moving path by manual means.

When the present invention is actually used, the conveying device 11 of the printing device 1 can be used to drive the printing device 12 toward the correction device 21 of the correction device 2 so that the printing head 121 made of the elastic material of the printing device 12 is squeezed downward. On the surface of the detection platform 211 of the correction device 21, at this time, the correction device 21 will sense the deformed contour 1211 of the print head 121 through the correction detector 212, and calculate the contour 1211 by the processing module 22. To obtain the center point of the contour 1211, and the conveying device 11 of the printing device 1 can adjust the distance value of the moving path according to the center point. The conveying device 11 of the printing device 1 can be used to continue the printing head of the printing device 12 121 is conveyed to the ink taking platform 31 of the ink taking area 3, and the center point is exactly aligned with the center point of the ink pattern 311 on the ink taking platform 31, and the ink pattern 311 on the surface of the ink taking platform 31 is taken down, and then borrowed The conveying device 11 is used to convey the printing head 121 of the printing device 12 to the printing platform 41 of the printing area 4, and the center point is located at the center point of the printed object 5 on the printing platform 41, and the ink pattern 311 is accurately downward Seal 5 to be printed on the surface thereof.

The invention has the following advantages:

(1) The elastic print head 121 of the printing device 12 is first pressed on the surface of the detection platform 211 of the calibration device 21 to generate deformation, and is sensed by the calibration detector 212 of the calibration device 21, and then processed by the processing module 22 To find at least one correction point a of the contour 1211 after the deformation of the print head 121, because the contour 1211 after the extrusion is sensed, it can conform to the actual use state, and the correction point a can be used to accurately correct the conveying device 11 The path of the print head 121 can be accurately aligned for subsequent use, which can reduce the error when the print head 121 is used, thereby reducing the waste of materials such as ink and molds, in order to improve the product yield and reduce the manufacturing cost. .

(2) The elastic printing head 121 of the printing device 12 is first pressed against the surface of the detection platform 211 of the calibration device 21 to produce deformation. At the same time, the printing head 121 can be tested for hardening, cracking or other defects in the material itself. Avoid using defective print head 121.

(3) The detection platform 211 of the calibration device 21 is transparent, and the calibration detector 212 is installed inside the calibration device 21. When the elastic print head 121 of the printing device 12 is pressed against the surface of the detection platform 211, deformation occurs At this time, the correction detector 212 can directly perform a sensing operation on the detection platform 211 at the same time, so as to most accurately sense the contour 1211 after the print head 121 is squeezed, thereby improving the accuracy of obtaining at least one correction point a, thereby Achieve the effect of reducing errors.

(4) The detection platform 211 of the calibration device 21 is preferably made of glass, and its glass has high light transmittance and high hardness, so when the print head 121 is pressed on the surface of the detection platform 211, the glass is made of The detection platform 211 is not easily deformed, and because the glass has high light transmittance, the calibration detector 212 is the clearest when sensing the detection platform 211 made of glass to make the calibration detector 212 can clearly sense the contour 1211 squeezed by the print head 121, thereby achieving the effect of improving the accuracy of obtaining at least one correction point a.

The above is only a preferred embodiment of the present invention, and therefore does not limit the patent scope of the present invention. Therefore, any simple modifications and equivalent structural changes made by using the description and drawings of the present invention should be included in the same way. Within the scope of the patent of the present invention, Chen Ming is incorporated.

In summary, the above-mentioned calibration method of the printing press table of the present invention is to achieve its efficacy and purpose when it is used. Therefore, the present invention is an invention with excellent practicability. To clarify the application requirements for patents, apply in accordance with the law, and hope that the review committee will grant this case at an early date to protect the inventor's hard invention. If there is any suspicion of the review committee of the Bureau, please follow the instructions of the letter. Poop.

Claims (8)

A method for calibrating a printing machine is performed according to the following steps: (A) The conveying device of the printing equipment is used to drive the printing device to move toward the calibration device of the calibration device, so that the printing device is made of at least one elastic material. The head is pressed on the surface of the detection platform of the correction device, thereby deforming the print head due to the pressing; (B) The correction device will use the correction detector to sense the contour of the print head after deformation, and pass the correction detector An electrically connected processing module is used to calculate the position of at least one correction point of the contour; (C) The conveying device of the printing equipment will convey the printing head of the printing device to the ink taking platform of the ink taking area with preset parameters. And through the conveying device, the printing head is brought into contact with the ink taking platform to get the ink pattern on the surface of the ink taking platform; (D) the conveying device is used to convey the printing head of the printing device to the printing platform in the printing area; , And the printing head is brought into contact with the printing platform through the conveying device, thereby transferring the ink pattern attached to the printing head to the printed matter on the printing platform; There is a detection device at one side of the ink taking area and the printing area, and the detection device is provided with a first detector and a second detector for sensing the ink taking platform and the printing platform. When step (C) is performed, Previously, in order to first use a detection device to sense the ink pattern of the ink platform and the printed matter on the printing platform, at least one correction on the ink pattern was detected through the first detector and the second detector of the detection device, respectively. Dots and at least one calibration point on the printed matter, when the print head is performed in step (C), in order to position the at least one calibration point pair at least one calibration point position so that the print head gets the ink pattern, and when the print head When executed in step (D), the at least one correction point pair is positioned at the position of at least one correction point, so that the printing head transfers the ink pattern onto the object to be printed. According to the calibration method of the pad printing machine described in item 1 of the scope of patent application, wherein the surface of the calibration device of the calibration device in step (A) is provided with a transparent detection platform, and the calibration device is provided with a detection platform for the detection platform. The calibration detector for the testing operation, and the testing platform of the calibration device is made of glass and transparent acrylic plate, and is preferably made of glass. The method for correcting a pad printer as described in item 1 of the scope of patent application, wherein the contour correction point in step (B) is located at the center point. According to the correction method of the printing machine table described in the first item of the scope of patent application, wherein the contour of the print head in step (B) after deformation is round, and the processing module of the correction device is measured using a true circle measurement. Method to measure the outer diameter of the contour of the contour, and then find the correction point. According to the method for correcting a printing machine described in item 4 of the scope of patent application, if the correction point is the position of the center point of the circular contour, the processing module is to use the preset contour and the preset center built in the processing module. The points are compared to the position of the center point of the contour, or the center point is found by using the orthogonal and triangular outer-center formula. For example, the calibration method for a pad printer described in item 1 of the scope of patent application, wherein the processing module of the calibration device in step (B) is electrically connected with a display interface, and the display interface can be used to display the calibration detector sensing Screen. According to the method for correcting a printing machine described in item 1 of the scope of the patent application, wherein the preset parameter of the conveying device of the printing device in this step (° C) may be the distance of the moving path or the pressing force, and the at least one correction point and When the distance between at least one correction point is changed, the conveying device adjusts the distance of the moving path so that the at least one correction point can be accurately aligned with the at least one correction point. According to the correction method of the printing machine table described in item 7 of the scope of patent application, the way for the conveying device of the printing equipment to adjust the distance of the moving path is to use the processing module of the correction equipment to calculate and use the processing module to automatically drive The conveying device adjusts the distance value of the moving path.