Rotary High-Precision Holographic Hard Press

Abstract

The present invention specifically relates to a rotary high-precision holographic hard press, which comprises an unwinding mechanism, a front traction mechanism, a molding system, a rear traction mechanism and a winding mechanism. It is characterized in that the molding system comprises a first molding system and a second molding system. Both the first molding system and the second molding system include a rotary molding plate roller, a molding steel roller and a power cylinder. A front film length adjustment mechanism is provided between the unwinding mechanism and the front traction mechanism. A positioning adjustment mechanism is provided between the first molding system and the second molding system. A rear film length adjustment mechanism is provided between the rear traction mechanism and the winding mechanism. The present invention has the advantages of reasonable structure, flexible and convenient use, and high positioning accuracy. When molding, the first molding system or the second molding system can be used alone in the present invention for single-sided molding on uncoated aluminized films such as PET and BOPP, or both can be used simultaneously for double-sided alignment molding.

Description

Technical Field

[0001] The present invention belongs to the field of holographic embossing machinery, and particularly relates to a rotary high-precision holographic hard press. Background Art

[0002] Holographic laser technology can improve the decoration effect and anti-counterfeiting function, and is currently widely used in the delicate packaging of products such as cigarettes, wines, bottle labels, tea, food, cosmetics, daily chemicals, general merchandise, gifts, handicrafts, etc., and can also be used in building decoration materials. With the development of holographic laser transfer technology, the current laser transfer film has developed from single-sided laser to double-sided laser. The current double-sided laser machine includes two sets of embossing systems inside, which can achieve double-sided laser embossing transfer, but it cannot achieve double-sided high-precision alignment embossing and cannot meet the product requirements for precise positioning of the front and back sides. Summary of the Invention

[0003] The purpose of the present invention is to solve the defect of poor positioning accuracy of the existing double-sided holographic press during front and back side embossing, and to provide a rotary high-precision holographic hard press, which is provided with front and rear film length adjustment mechanisms and a positioning adjustment mechanism, and uses a rotary embossing plate roller to achieve double-sided high-precision alignment embossing.

[0004] The present invention is realized through the following technical solutions:

[0005] That is, a rotary high-precision holographic hard press includes an unwinding mechanism, a front traction mechanism, an embossing system, a rear traction mechanism, and a winding mechanism. It is characterized in that the embossing system includes a first embossing system and a second embossing system. Both the first embossing system and the second embossing system include a rotary embossing plate roller, an embossing steel roller, and a power cylinder. An embossing plate is provided on the rotary embossing plate roller. Both ends of the rotary embossing plate roller are installed on the plate roller bracket through bearings, and one end of its roller shaft is connected to a servo motor. The telescopic rod of the power cylinder is connected to the frame. The rotary embossing plate roller of the first embossing system is above the embossing steel roller, and the rotary embossing plate roller of the second embossing system is below the embossing steel roller. A front film length adjustment mechanism is provided between the unwinding mechanism and the front traction mechanism, a positioning adjustment mechanism is provided between the first embossing system and the second embossing system, and a rear film length adjustment mechanism is provided between the rear traction mechanism and the winding mechanism. The front film length adjustment mechanism, the positioning adjustment mechanism, and the rear film length adjustment mechanism are all composed of a roller and a power cylinder, and the telescopic rod of the power cylinder is connected to the roller.

[0006] The unwinding mechanism, the front traction mechanism, the rear traction mechanism, and the winding mechanism of the present invention are the same as those of the existing technology press, and the rollers of each mechanism are all connected to a drive motor, which is a conventional technology well-known to those skilled in the art, and its specific structure will not be described in detail here.

[0007] The rotary compression plate cylinder of the present invention is installed on a plate cylinder bracket. Under the control of a power cylinder, the entire plate cylinder bracket together with the rotary compression plate cylinder and the servo motor can move up and down. The rotary compression plate cylinder can rotate a certain angle and return to its original position under the control of the servo motor.

[0008] The power cylinders in the compression system, traction mechanism, and positioning and adjusting mechanism of the present invention all adopt pneumatic cylinders or hydraulic cylinders that are mature in the prior art.

[0009] The power cylinders and drive motors in each mechanism of the present invention are all connected to the PLC system through signals to achieve automatic control. The PLC system is preferably but not limited to Siemens S7-300. Its programming and port connection methods are all conventional techniques in the technical field of numerical values and will not be described in detail here.

[0010] The compression plate of the present invention and its fixing method are all prior art and are the same as those of existing compression presses.

[0011] Furthermore, a holographic grating is provided on the compression plate in the first compression system of the present invention, and at least one photoelectric sensor is provided at the film inlet end of the second compression system.

[0012] The photoelectric sensor of the present invention is a commercially available product that is mature in the prior art. It is preferably but not limited to Panasonic LX-101. It includes a detection light source and a detection light source receiving device corresponding to the detection light source. The detection light source receiving device is connected to the PLC system for data. The light beam emitted by the detection light source irradiates on the film, and the light beam is reflected by the calibration point formed by the first compression system to the receiving probe and received by the receiving probe. Then the receiving probe generates a signal and transmits the signal to the PLC system. The PLC system processes the signal to generate a control signal for controlling the second rotary compression plate cylinder and the positioning and adjusting mechanism, and controls the movement part of the second rotary compression plate cylinder and the positioning and adjusting roller driving device to move. By setting the photoelectric sensor, the present invention can achieve automatic adjustment.

[0013] The present invention designs a holographic grating on the compression plate of the first compression system for calibration detection of the second compression system. The calibration point generated when the film passes through the first compression system is a specific calibration point holographic pattern formed by the holographic grating pre-designed on the compression plate of the first compression system on the film. Before the film enters the second compression system, the photoelectric sensor will detect and identify it for accurate positioning.

[0014] The working principle of the present invention is as follows:

[0015] The aluminized film enters the first die stamping system through the unwinding mechanism, the front film length adjustment mechanism and the front traction mechanism. The power cylinder of the first die stamping system drives the rotary die stamping plate roller to press downwards and engage with the die stamping steel roller. The PLC system controls the rotary die stamping plate roller of the first die stamping system to rotate a certain angle according to the pre-set plate distance, completing one plate distance die stamping. Then, the rotary die stamping plate roller of the first die stamping system disengages from the die stamping steel roller under the action of the power cylinder, and the PLC system controls the rotary die stamping plate roller of the first die stamping system to rotate reversely according to the pre-set plate distance and return to the initial position. The film enters the second die stamping system through the positioning adjustment mechanism. The PLC system controls the positioning adjustment mechanism to adjust the position until the second die stamping system forms a holographic pattern at the predetermined position on the film surface. After completing one plate distance die stamping, the rotary die stamping plate roller of the second die stamping system disengages from the die stamping steel roller under the action of the power cylinder, and the PLC system controls the rotary die stamping plate roller of the second die stamping system to rotate reversely according to the pre-set plate distance and return to the initial position. After double-sided die stamping, the film is wound up after passing through the rear traction mechanism and the rear film length adjustment mechanism.

[0016] When the rotary die stamping plate rollers of the first die stamping system and the second die stamping system work together, the front traction mechanism, the rear traction mechanism and the plate roller run synchronously, that is, the film moves forward between the front traction mechanism and the rear traction mechanism; when the plate rollers of the first die stamping system and the second die stamping system disengage and rotate back, the front traction mechanism and the rear traction mechanism are in a static state, the film between the front traction mechanism and the rear traction mechanism is in a static state, and the front and rear film length adjustment mechanisms will adjust the film length to ensure stable tension.

[0017] The present invention has the advantages of reasonable structure, flexible and convenient use, and high positioning accuracy. The present invention can use the first die stamping system or the second die stamping system alone during die stamping, perform single-sided die stamping on uncoated aluminized films such as PET and BOPP, or use both simultaneously for double-sided alignment die stamping. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] Figure 1 is a schematic structural diagram of the present invention;

[0019] Figure 2 is an enlarged structural schematic diagram of the rotary die stamping plate roller of the present invention.

[0020] As shown in the figure: 1. Unwinding mechanism; 2. Front film length adjustment mechanism; 3. Front traction mechanism; 4. First die stamping system; 5. Positioning adjustment mechanism; 6. PLC system; 7. Second die stamping system; 8. Rear traction system; 9. Rear film length adjustment mechanism; 10. Winding mechanism; 11. Photoelectric sensor; 12. Rotary die stamping plate roller; 13. Plate roller support; 14. Precision cylinder; 15. Coupling; 16. Servo motor. DETAILED DESCRIPTION OF THE INVENTION

[0021] The embodiments of the technical solution of the present invention will be described in detail below with reference to the accompanying drawings. The following embodiments are only used to more clearly illustrate the technical solution of the present invention, so they are only examples and cannot be used to limit the protection scope of the present invention. It should be noted that unless otherwise specified, the technical terms or scientific terms used in this application should have the ordinary meaning understood by those skilled in the art to which the present invention belongs.

[0022] As Figure 1 , Figure 2 shown: A PLC system 6 of model Siemens S7-300 is provided on the upper part of the body of the present invention. Inside the body, a unwinding mechanism 1, a front film length adjustment mechanism 2, a front traction mechanism 3, a first molding system 4, a positioning adjustment mechanism 5, a second molding system 7, a rear traction system 8, a rear film length adjustment mechanism 9 and a winding mechanism 10 are arranged in sequence from left to right. The front film length adjustment mechanism 2, the positioning adjustment mechanism 5 and the rear film length adjustment mechanism 9 are all composed of a roller and a pneumatic cylinder, and the roller can move up and down; The first molding system 4 and the second molding system 7 are both composed of a rotary molding plate roller 12, a molding steel roller and a pneumatic cylinder. The positions of the rotary molding plate rollers of the first molding system 4 and the second molding system 7 are opposite. The telescopic rod of the precision air cylinder 14 is connected to the plate roller bracket 13. Both ends of the rotary molding plate roller 12 are installed on the plate roller bracket 13 through bearings, and the right end of its roller shaft is connected to the servo motor 16 through a coupling 15. The telescopic movement of the telescopic rod of the precision air cylinder can drive the entire plate roller bracket 13 together with the rotary molding plate roller 12 and the servo motor 16 to move up and down; A Banner QS18E photoelectric sensor 11 close to the second molding system 7 is also provided between the first molding system 4 and the second molding system 7. It includes a detection light source and a detection light source receiving device corresponding to the detection light source. The detection light source receiving device is data-connected to the PLC system 6.

[0023] When the present invention is in use, the aluminized film enters the first embossing system 4 through the unwinding mechanism 1, the front film length adjusting mechanism 2, and the front traction mechanism 3. The precision cylinder 14 of the first embossing system 4 drives the rotary embossing plate roller 12 to press down and engage with the embossing steel roller. The PLC system 6 controls the servo motor 16 to drive the rotary embossing plate roller 12 of the first embossing system 4 to rotate a certain angle according to the pre-set plate distance, completing an embossing of one plate distance. The embossing plate of the first embossing system 4 is designed with a holographic grating, which will form a calibration point holographic pattern on the film. Then, the rotary embossing plate roller 12 of the first embossing system 4 disengages from the embossing steel roller under the action of the precision cylinder 14. The PLC system 6 controls the servo motor 16 of the first embossing system 4 to drive the rotary embossing plate roller 12 to rotate reversely according to the pre-set plate distance and return to the initial position. The film enters the second embossing system 7 through the positioning and adjusting mechanism 5. The light beam emitted by the detection light source of the photoelectric sensor 11 irradiates on the film, and the light beam is reflected by the calibration point formed by the first embossing system 4 to the receiving probe and received by the receiving probe. Then, the receiving probe generates a signal and transmits the signal to the PLC system 6. The PLC system 6 processes the signal and generates a control signal for controlling the rotary embossing plate roller 12 of the second embossing system 7 and the positioning and adjusting mechanism 5, controlling the precision cylinders of the second embossing system 7 and the positioning and adjusting mechanism 5 to adjust the positions of the rotary embossing plate roller 12 and the roller. After the position adjustment is completed, the PLC system 6 controls the rotary embossing plate roller 12 of the second embossing system 7 to rotate a certain angle according to the pre-set plate distance, completing an embossing of one plate distance, and forming a holographic pattern at a predetermined position on the film surface. After completing an embossing of one plate distance, the rotary embossing plate roller 12 of the second embossing system 7 disengages from the embossing steel roller under the action of the precision cylinder 14. The PLC system 6 controls the rotary embossing plate roller 12 of the second embossing system 7 to rotate reversely according to the pre-set plate distance and return to the initial position. After double-sided embossing, the film is wound up after passing through the rear traction mechanism 8 and the rear film length adjusting mechanism 9.

[0024] When the rotary embossing plate rollers of the first embossing system 4 and the second embossing system 7 are engaged for embossing work, the front traction mechanism 3, the rear traction mechanism 8, and the plate roller run synchronously, that is, the film moves forward between the front traction mechanism 3 and the rear traction mechanism 8; when the rotary embossing plate rollers of the first embossing system 4 and the second embossing system 7 disengage and rotate back, the front traction mechanism 3 and the rear traction mechanism 8 are in a stationary state, that is, the film between the front traction mechanism 3 and the rear traction mechanism 8 is in a stationary state. At this time, the front film length adjusting mechanism 2 and the rear film length adjusting mechanism 9 will adjust the film length to ensure stable tension.

[0025] The above embodiments are only used to illustrate the technical solutions of the present invention, rather than to limit it; although the present invention has been described in detail with reference to the foregoing embodiments, those of ordinary skill in the art should understand that: they can still modify the technical solutions described in the foregoing embodiments, or perform equivalent replacements on some or all of the technical features; and these modifications or replacements do not make the essence of the corresponding technical solutions deviate from the scope of the technical solutions of the embodiments of the present invention, and they should all be covered within the scope of the claims and the description of the present invention.

Claims

1. A rotary high-precision holographic hard press, comprising an unwinding mechanism, a front traction mechanism, a molding system, a rear traction mechanism and a winding mechanism, characterized in that The embossing system includes a first embossing system and a second embossing system. Both the first embossing system and the second embossing system include a rotary embossing plate roller, an embossing steel roller, and a power cylinder. An embossing plate is provided on the rotary embossing plate roller. Both ends of the rotary embossing plate roller are installed on the plate roller bracket through bearings, and one end of its roller shaft is connected to a servo motor. The telescopic rod of the power cylinder is connected to the frame. The rotary embossing plate roller of the first embossing system is above the embossing steel roller, and the rotary embossing plate roller of the second embossing system is below the embossing steel roller. A front film length adjustment mechanism is provided between the unwinding mechanism and the front traction mechanism. A positioning adjustment mechanism is provided between the first embossing system and the second embossing system. A rear film length adjustment mechanism is provided between the rear traction mechanism and the winding mechanism. The front film length adjustment mechanism, the positioning adjustment mechanism, and the rear film length adjustment mechanism are all composed of a rotating roller and a power cylinder. The telescopic rod of the power cylinder is connected to the rotating roller. A holographic grating is provided on the embossing plate in the first embossing system. The calibration point generated when the film passes through the first embossing system is a calibration point holographic pattern formed on the film by the holographic grating pre-designed on the embossing plate of the first embossing system. Before the film enters the second embossing system, a photoelectric sensor will detect and identify it for precise positioning. At least one photoelectric sensor is provided at the film inlet end of the second embossing system. The PLC system controls the rotary embossing plate roller of the first embossing system to rotate a certain angle according to the pre-set plate distance to complete an embossing of one plate distance. Then, the rotary embossing plate roller of the first embossing system is separated from the embossing steel roller under the action of the power cylinder. The PLC system controls the rotary embossing plate roller of the first embossing system to rotate in the reverse direction according to the pre-set plate distance and rotate back to the initial position. The film enters the second embossing system through the positioning adjustment mechanism. The PLC system controls the positioning adjustment mechanism to adjust the position until the second embossing system forms a holographic pattern at the predetermined position on the film surface. After completing an embossing of one plate distance, the rotary embossing plate roller of the second embossing system is separated from the embossing steel roller under the action of the power cylinder. The PLC system controls the rotary embossing plate roller of the second embossing system to rotate in the reverse direction according to the pre-set plate distance and rotate back to the initial position.

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