Printing machine and deviation rectifying and positioning structure thereof

Abstract

The utility model discloses a printing machine and a deviation rectifying and positioning structure thereof, which comprises a turntable (1), a printing base (2) and a deviation rectifying platform (3), the turntable (1) is provided with a printing base placing station, and the printing base placing station is provided with a vertically through window (12) for deviation rectifying; a first magnetic attraction pair structure which is excited to be matched in a magnetic attraction mode during printing is arranged on the printing base placing station and the bottom of the printing base (2), and a second magnetic attraction pair structure which is excited to be matched in a magnetic attraction mode during deviation correction is arranged on the deviation correction platform (3) and the bottom of the printing base (2). The product is always positioned in the printing base and does not move in the deviation rectifying and aligning / printing process, only the printing base moves, the frequency that the product makes contact with the printing base and other modules is reduced, the risk that the appearance is scratched is reduced, and the delay problem existing in an existing jacking column vacuum adsorption product jacking mode can be solved.

Description

Technical Field

[0001] The utility model relates to the field of printing presses, in particular to a printing press and a deviation correction and positioning structure thereof. Background Art

[0002] A printing (screen / pad printing) machine includes a motor and a turntable connected to it for rotation. A product jig (also called a printing base) is fixedly installed on the turntable. The product jig is provided with a jig cavity. The jig cavity is used to position and place a product to be printed. The product is vacuum-adsorbed in the jig cavity, and the turntable rotates with the product to the printing station for printing. Before printing on the screen / pad printing machine, the position of the product may deviate, so correction is required. The correction mode before printing of most existing printing (screen / pad printing) machines is to calculate the XYR coordinates by taking a CCD photo of the product's appearance features, and then use the lifting column of the UVW platform to vacuum-absorb the product and lift it out of the jig cavity (there are through holes at the bottom of the jig for the lifting column to pass through). After the correction compensation is completed, the product is placed into the jig cavity. In this way, the correction action is completed by exchanging the vacuum of the lifting column and the vacuum of the jig.

[0003] The problems with the above-mentioned printing (screen printing / pad printing) machine correction mode structure are:

[0004] (1) The jacking column vacuum adsorption product lifting mode. Since the jacking column has a small suction area, a large vacuum value is required to ensure that the product is basically adsorbed. The jacking column suction position is close to the product strength measurement position, which has the risk of affecting the product strength.

[0005] (2) The lifting column vacuum adsorption product lifting mode. Due to the increasing size of products and the inconsistent weight of the head and tail, it is difficult to firmly absorb the product even when the maximum vacuum value is turned on. This causes friction between the product and the fixture, which affects the risk of poor appearance. The deviation compensation value of the system is significantly different from the actual deviation compensation value, resulting in the product position not being fully corrected and compensated.

[0006] (3) In the lifting mode of the lifting column vacuum adsorption product, there is a delay in the exchange between the vacuum on the fixture and the lifting vacuum. The product shakes when it is lifted and there is a risk of slipping.

[0007] The above information disclosed in this Background section is included only for enhancement of understanding of the background of the disclosure and therefore it may contain information that does not form the prior art that is currently known to a person of ordinary skill in the art. Utility Model Content

[0008] The technical problem to be solved by the present invention is to provide a printing press and a deviation correction and positioning structure thereof in view of the above-mentioned defects of the prior art.

[0009] The technical solution adopted by the utility model to solve its technical problems is:

[0010] On the one hand, a printing press correction and positioning structure is constructed, comprising a turntable, a printing base for positioning and placing a product to be printed, and a correction platform located below the turntable, wherein at least one printing base placement station is provided on the turntable, and the printing base placement station is provided with a vertically through window for correction;

[0011] The printing base is movably placed on the printing base placement station, and a first magnetic attraction pair structure that cooperates with each other is provided on the printing base placement station and in an area of ​​the bottom of the printing base avoiding the window. The first magnetic attraction pair structure is used to be activated during printing to fix the turntable and the printing base by magnetic attraction.

[0012] A second magnetic pair structure that cooperates with each other is set on the correction platform and in the area of ​​the bottom of the printing base facing the window. The second magnetic pair structure is used to be excited during correction to fix the printing base and the correction platform by magnetic attraction, so that the correction platform moves with the printing base on the turntable to achieve correction.

[0013] Furthermore, in the printing press correction and positioning structure described in the present invention, the first magnetic attraction pair structure includes a first adsorption component arranged at the bottom of the printing base and a second adsorption component arranged on the printing base placement station, and one of the first adsorption component and the second adsorption component is an electromagnet and the other is a metal part.

[0014] Furthermore, in the printing press correction and positioning structure described in the present invention, the first adsorption component is a metal block embedded in the bottom of the printing base; the printing base placement station is provided with a socket, and the second adsorption component is a first electromagnet column that is completely inserted into the socket.

[0015] Furthermore, in the printing press correction and positioning structure described in the present invention, the window is located directly below the printing base, and there are two metal blocks, which are respectively embedded in the bottom of the printing base near both ends; and a plurality of the first electromagnet columns are arranged directly below each of the metal blocks.

[0016] Furthermore, in the printing press correction and positioning structure described in the present invention, the printing base placement station includes a groove arranged on the turntable, the printing base is placed in the groove, the window is opened at the bottom of the groove, and the socket is arranged at the bottom of the groove.

[0017] Furthermore, in the printing press correction and positioning structure described in the present invention, the second magnetic attraction pair structure includes a third adsorption component arranged at the bottom of the printing base and a fourth adsorption component arranged on the correction platform, and one of the third adsorption component and the fourth adsorption component is an electromagnet and the other is a metal part.

[0018] Furthermore, in the printing press correction and positioning structure described in the present invention, the third adsorption component is a metal spring installed at the bottom of the printing base, and the metal spring passes through the window; the fourth adsorption component is a second electromagnet column protrudingly installed on the correction platform.

[0019] Furthermore, in the printing press correction and positioning structure described in the present invention, the window is located directly below the printing base, and the number of the metal springs is two. One end of the metal spring is fixed to the bottom of the printing base, and the other end is bent into a horizontal shape after passing through the window, and a plurality of the second electromagnet columns are arranged correspondingly directly below.

[0020] Furthermore, in the printing press deviation correction and positioning structure described in the present invention, a plurality of printing base placement stations are provided on the turntable, and the plurality of printing base placement stations are evenly distributed in a circle around the center of the turntable.

[0021] In a second aspect, a printing press is constructed, which includes the deviation correction and positioning structure as described in any of the above items.

[0022] The printing machine and its deviation correction and positioning structure of the present invention have the following beneficial effects: the product of the present invention is stably placed in the printing base from the beginning of material discharge, and the two magnetic attraction structures can be exchanged and excited during printing and deviation correction, so that the printing base is fixed to the turntable by magnetic attraction during printing, and is fixed to the deviation correction platform by magnetic attraction during deviation correction and positioning to complete the product deviation correction and compensation positioning. In this way, the product is always positioned in the printing base and does not move during the deviation correction and positioning / printing process, and only the printing base itself moves. Compared with the previous deviation correction mode, the frequency of contact between the product and the printing base and other modules can be reduced, thereby reducing the risk of scratches on the appearance. In addition, fixing the printing base by magnetic attraction can overcome the delay problem existing in the existing lifting mode of vacuum adsorption of products by lifting columns. BRIEF DESCRIPTION OF THE DRAWINGS

[0023] In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the following briefly introduces the drawings required for use in the embodiments or the description of the prior art. Obviously, the drawings described below are only embodiments of the present invention. Those skilled in the art can obtain other drawings based on the provided drawings without inventive work.

[0024] Figure 1 This is a structural diagram of the deviation correction and positioning structure of the printing press of the utility model;

[0025] Figure 2 This is a schematic diagram of the installation position of the electromagnet;

[0026] Figure 3 This is a schematic diagram of the bottom of the printed base;

[0027] Among them, the reference numerals in the figures are:

[0028] 1. Turntable; 2. Printing base; 3. Correction platform; 41. First adsorption component; 42. Second adsorption component; 43. Third adsorption component; 44. Fourth adsorption component; 11. Groove; 12. Window; 100. Product. DETAILED DESCRIPTION

[0029] To facilitate understanding of the present invention, a more comprehensive description of the present invention will be given below with reference to the relevant drawings. Typical embodiments of the present invention are given in the drawings. However, the present invention can be implemented in many different forms and is not limited to the embodiments described herein. On the contrary, the purpose of providing these embodiments is to make the disclosure of the present invention more thorough and comprehensive. It should be understood that the embodiments of the present invention and the specific features in the embodiments are detailed descriptions of the technical solutions of the present application, rather than limitations on the technical solutions of the present application. In the absence of conflict, the embodiments of the present invention and the technical features in the embodiments can be combined with each other.

[0030] refer to Figure 1 The printing press correction and positioning structure of this embodiment includes a turntable 1, a printing base 2, and a correction platform 3. The correction platform 3 is a UVW platform and is located below the turntable 1. The printing base 2 is set on the turntable 1.

[0031] The turntable 1 is arranged horizontally and its center is connected to a DD (Direct Drive Motor) motor so as to rotate as the motor rotates. The turntable 1 is provided with at least one printing base placement station, generally a plurality of printing base placement stations, which are evenly distributed in a circle around the center of the turntable 1. In this embodiment, there are specifically four printing base placement stations. The printing base placement station is provided with a vertically penetrating window 12 for deviation correction. During the rotation of the turntable, the window 12 will pass directly above the deviation correction platform 3.

[0032] Specifically, the printing base placement station includes a groove 11 disposed on the turntable 1. A window 12 is defined at the bottom of the groove 11. Window 12 is a rectangular opening located in the center of the groove 11. The printing base 2 is positioned within the groove 11. The planar dimensions of the groove 11 are larger than those of the printing base 2, facilitating movement and adjustment of the position of the printing base 2 within the groove 11. In this embodiment, the printing base 2 is a rectangular plate, and the groove 11 is a shallow rectangular slot. It is understood that the shape and dimensions of the groove 11 can be designed to accommodate a variety of printing base 2 shapes and sizes.

[0033] The printing base 2, also known as a jig, is a rectangular plate with a jig cavity at the top for positioning the product 100 to be printed. The printing base 2 typically secures the product 100 through vacuum suction. For example, vacuum holes are typically provided at the bottom of the jig cavity. These holes extend to other locations on the printing base 2 and are connected to external vacuum equipment via vacuum pipes.

[0034] In this embodiment, the printing base 2 is movably placed on the printing base placement station (specifically, within the groove 11) and is movable. During printing, it is fixed to the turntable 1 by magnetic attraction, and during deflection correction, it is fixed to the deflection correction platform 3 by magnetic attraction. Specifically, on one hand, a first magnetic attraction pair structure that cooperates with each other is provided in an area on the printing base placement station and at the bottom of the printing base 2 that avoids the window 12. The first magnetic attraction pair structure is used to be activated during printing to fix the turntable 1 and the printing base 2 by magnetic attraction. It is not activated during deflection correction, so that the turntable 1 and the printing base 2 cannot be fixed by magnetic attraction. On the other hand, a second magnetic pair structure that cooperates with each other is set on the correction platform 3 and in the area of ​​the bottom of the printing base 2 facing the window 12. The second magnetic pair structure is used to be excited during correction to fix the printing base 2 and the correction platform 3 by magnetic attraction, so that the correction platform 3 moves with the printing base 2 on the turntable 1 to achieve correction. It is not excited during printing, so the correction platform 3 and the printing base 2 cannot be fixed by magnetic attraction.

[0035] More specifically, combined Figure 1-3 The first magnetic pair structure includes a first adsorption component 41 arranged at the bottom of the printing base 2 and a second adsorption component 42 arranged on the printing base placement station, and the second magnetic pair structure includes a third adsorption component 43 arranged at the bottom of the printing base 2 and a fourth adsorption component 44 arranged on the correction platform 3.

[0036] Wherein, one of the first adsorption member 41 and the second adsorption member 42 is an electromagnet and the other is a metal member. One of the third adsorption member 43 and the fourth adsorption member 44 is an electromagnet and the other is a metal member.

[0037] In this embodiment, the first adsorption member 41 and the third adsorption member 43 are metal parts; the second adsorption member 42 and the fourth adsorption member 44 are electromagnets, which are controlled by the PLC and will only adsorb metal parts when they are stimulated by the PLC control. Specifically, the first adsorption member 41 is a metal block embedded in the bottom of the printing base 2; a socket is provided at the bottom of the groove 11 where the printing base is placed, and the second adsorption member 42 is a first electromagnet column inserted into the socket. The third adsorption member 43 is a metal spring installed at the bottom of the printing base 2, and the metal spring passes through the window 12; the fourth adsorption member 44 is a second electromagnet column protruding from the correction platform 3.

[0038] Because the window 12 in this example is located in the middle position directly below the printing base 2, in order to ensure magnetic attraction, the number of metal blocks in this embodiment is two, which are respectively embedded in the bottom of the printing base 2 near both ends. It should be noted that the metal block is completely embedded in the bottom of the printing base 2 and does not protrude from the bottom of the printing base 2, and does not affect the horizontal placement of the printing base 2; similarly, the first electromagnet column is completely inserted into the socket and does not protrude from the bottom of the groove 11, and does not affect the horizontal placement of the printing base 2. The number of first electromagnet columns is four, and two of the first electromagnet columns are arranged directly below each metal block. It can be understood that this is only an example, and the number and shape of the metal blocks and the first electromagnet columns are not limited to this. In theory, as long as the electric-controlled magnetic attraction effect can be achieved, it will be sufficient.

[0039] In this embodiment, there are two metal springs, distributed between the center and the ends of the printing base 2. Of course, the number of metal springs can also be one or more. Each metal spring is roughly Z-shaped, with one end horizontal and secured to the bottom of the printing base 2 by welding or screws. After passing through the window 12 at an angle away from the other metal spring, the other end bends horizontally, with the two second electromagnets positioned directly below. Again, this is merely an example; the number and shape of the metal springs and second electromagnets are not limited to this; in theory, any configuration that can achieve electrically controlled magnetic attraction will suffice.

[0040] The working process of this embodiment is as follows: after the product CCD takes a picture of the XYR position, the UVW platform starts to perform the correction action, the correction electromagnet on the UVW platform starts to work and attracts the rigid spring piece on the printing base 2, and the electromagnet on the turntable is released. After the UVW platform completes the correction compensation, the electromagnet on the turntable starts to adsorb, the electromagnet on the UVW platform is released, and the turntable rotates to the printing station to start printing, and the work cycle is repeated.

[0041] In this embodiment, the product is placed steadily in the jig cavity from the beginning of unloading, and the product is in a vacuum adsorption state and does not move during the correction and alignment / printing process. Compared with the previous correction mode, the frequency of contact between the product and the jig and other modules can be reduced. There are only two mobile contacts, that is, putting in and taking out the printing base 2, which reduces the friction between the product and the jig and reduces the risk of scratches on the appearance. Compared with the existing lifting mode of vacuum adsorption of products by lifting columns, there is no need for adsorption exchange during the correction process, and the product will not be corrected in place due to the size and structural differences of the processed products, resulting in the risk of dimensional instability after printing. The printing base can be designed with a special cavity according to the shape of different products. There is no need to worry about the difference in the shape and structure of the product affecting the correction accuracy. The magnetic correction structure can ensure the stability of the product's accuracy during the printing process, and the yield is guaranteed.

[0042] It should be noted that when an element is referred to as being "fixed to" another element, it may be directly attached to the other element or there may be an intermediate element. When an element is referred to as being "connected to" another element, it may be directly connected to the other element or there may be an intermediate element. The terms "vertical," "horizontal," and similar expressions used herein are for illustrative purposes only.

[0043] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as those commonly understood by those skilled in the art in the art of the present invention. The terms used herein in the specification of the present invention are only for the purpose of describing specific embodiments and are not intended to limit the present invention.

[0044] Terms containing ordinal numbers, such as "first" and "second," used in this specification may be used to describe various components, but these components are not limited by these terms. These terms are used solely to distinguish one component from another. For example, a first component may be named a second component, and similarly, a second component may be named a first component, without departing from the scope of the present invention.

[0045] The embodiments of the present invention are described above in conjunction with the accompanying drawings, but the present invention is not limited to the above-mentioned specific implementation methods. The above-mentioned specific implementation methods are merely illustrative and not restrictive. Under the guidance of the present invention, ordinary technicians in this field can also make many forms without departing from the scope of protection of the purpose of the present invention and the claims, which are all within the protection of the present invention.

Claims

1. A printing press correction and positioning structure, characterized in that: The invention comprises a turntable (1), a printing base (2) for positioning and placing a product (100) to be printed, and a deviation correction platform (3) located below the turntable (1); the turntable (1) is provided with at least one printing base placement station, and the printing base placement station is provided with a window (12) for deviation correction that is through-through from top to bottom; The printing base (2) is movably placed on the printing base placement station, and a first magnetic attraction pair structure that cooperates with each other is provided on the printing base placement station and in an area of ​​the bottom of the printing base (2) avoiding the window (12). The first magnetic attraction pair structure is used to be excited during printing so as to fix the turntable (1) and the printing base (2) by magnetic attraction; A second magnetic pair structure that cooperates with each other is provided on the correction platform (3) and in an area on the bottom of the printing base (2) facing the window (12). The second magnetic pair structure is used to be excited during correction to fix the printing base (2) and the correction platform (3) by magnetic attraction, so that the correction platform (3) moves with the printing base (2) on the turntable (1) to achieve correction.

2. The printing press deviation correction and positioning structure according to claim 1, characterized in that: The first magnetic attraction pair structure comprises a first adsorption member (41) arranged at the bottom of the printing base (2) and a second adsorption member (42) arranged on the printing base placement station, wherein one of the first adsorption member (41) and the second adsorption member (42) is an electromagnet and the other is a metal member.

3. The printing press deviation correction and positioning structure according to claim 2, characterized in that: The first adsorption member (41) is a metal block embedded in the bottom of the printing base (2); the printing base placement station is provided with a socket, and the second adsorption member (42) is a first electromagnet column completely inserted into the socket.

4. The printing press deviation correction and positioning structure according to claim 3, characterized in that: The window (12) is located directly below the printing base (2), and there are two metal blocks, which are respectively embedded at the bottom of the printing base (2) near both ends; and a plurality of the first electromagnet columns are arranged directly below each metal block.

5. The printing press deviation correction and positioning structure according to claim 3, characterized in that: The printing base placement station comprises a groove (11) arranged on the turntable (1), the printing base (2) is placed in the groove (11), the window (12) is opened at the bottom of the groove (11), and the socket is arranged at the bottom of the groove (11).

6. The printing press deviation correction and positioning structure according to claim 1, characterized in that: The second magnetic attraction pair structure comprises a third adsorption member (43) arranged at the bottom of the printing base (2) and a fourth adsorption member (44) arranged on the deviation correction platform (3); one of the third adsorption member (43) and the fourth adsorption member (44) is an electromagnet and the other is a metal member.

7. The printing press deviation correction and positioning structure according to claim 6, characterized in that: The third adsorption member (43) is a metal spring installed at the bottom of the printing base (2), and the metal spring passes through the window (12); the fourth adsorption member (44) is a second electromagnet column protrudingly installed on the correction platform (3).

8. The printing press deviation correction and positioning structure according to claim 7, characterized in that: The window (12) is located directly below the printing base (2), and there are two metal springs. One end of the metal spring is fixed to the bottom of the printing base (2), and the other end is bent horizontally after passing through the window (12), and a plurality of the second electromagnet columns are arranged correspondingly directly below.

9. The printing press deviation correction and positioning structure according to claim 1, characterized in that: A plurality of printing base placement stations are provided on the turntable (1), and the plurality of printing base placement stations are evenly distributed in a circle around the center of the turntable (1).

10. A printing press, characterized in that: It comprises the deviation correction and positioning structure as described in any one of claims 1 to 9.

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