Transfer printing equipment

Abstract

The utility model provides pad printing equipment. The pad printing equipment comprises a rack, the inking device comprises a printing plate and a first movement module for driving the printing plate to be switched between a first station and a second station; the ink supply device comprises an oil disc arranged corresponding to the first station and a second movement module driving the oil disc to be attached to the top face of the printing plate. The transfer printing device comprises a silica gel head arranged above the second station and a third movement module for driving the silica gel head to ascend and descend; the positioning device comprises a positioning table and a hot air system for supplying hot air upwards; the cleaning device comprises a bearing table and a winding and unwinding roller for feeding adhesive tape to the top surface of the bearing table in a stepping manner; and the fourth movement module is used for driving the positioning device and the cleaning device to integrally move below the inking device, so that the positioning table and the bearing table alternately enter the position below the second station, and the contact time of the positioning table, the bearing table, the printing plate and the silica gel head is staggered. The equipment is compact in structural layout, and the production efficiency can be greatly improved.

Description

Technical Field

[0001] The utility model relates to the technical field of pad printing equipment. Background Art

[0002] With the rapid development of electronic devices such as mobile phones, tablet computers, and smart watches, the production equipment that supports them also needs to be updated and iterated. Among them, pad printing equipment for printing ink on the frame of the glass panel of electronic products is one of them. Traditional pad printing equipment usually requires a printing plate engraved with a pattern, an oil pan for inking the printing plate, a mobile rubber head for transfer, a heating device for preheating the ink on the rubber head, a positioning table for positioning the glass, and a cleaning component for removing residual ink on the rubber head. Due to the large number of processes, the printing plate needs to be inked first, and then the silicone head is repeatedly lifted and lowered and translated between the printing plate, heating device, positioning table and cleaning component to switch the workstation. In addition, the ink preheating effect will directly affect the printing quality, and sufficient heating time needs to be ensured. Therefore, the working efficiency of existing pad printing equipment is not high, and it is necessary to improve it. Utility Model Content

[0003] The utility model aims to provide a pad printing device with high production efficiency.

[0004] In order to achieve the above purpose, the technical solution adopted by the utility model is:

[0005] A pad printing device, comprising a frame for installing various devices of the device; an inking device, comprising a printing plate with a printing pattern engraved on the top surface and arranged horizontally, and a linear or rotary first motion module installed on the frame for driving the printing plate to switch between a first station and a second station in a horizontal direction; an ink supply device for providing ink for the printing plate, comprising an oil pan arranged above the printing plate corresponding to the first station, and a linear second motion module installed on the frame for driving the oil pan to fit the top surface of the printing plate; a transfer device, comprising a silicone head arranged above the printing plate corresponding to the second station, and a second motion module installed on the frame for driving the silicone head to rise and fall vertically. A linear third motion module; a positioning device, including a positioning table for positioning the workpiece on a horizontal plane, and a hot air system that supplies hot air around the positioning table and upward; a cleaning device, for removing residual ink on the silicone head, including a supporting table, and a reel-and-reel roller that allows the tape to step and fit across the top surface of the supporting table; and a linear or rotary fourth motion module, mounted on the frame, for driving the positioning device and the cleaning device to move as a whole below the inking device in a horizontal direction, so that the positioning table and the supporting table alternately enter below the second station, and the contact time between the positioning table, the supporting table, and the printing plate and the silicone head is staggered.

[0006] In a preferred embodiment, the first motion module and the fourth motion module are both electric screw drive systems; in the reset state, the working end of the printing plate corresponds to the first workstation position, the supporting platform corresponds to the second workstation, and the positioning platform corresponds to the third workstation.

[0007] In a preferred embodiment, the fourth motion module is arranged in parallel below the first motion module, and the first workstation, the second workstation, and the third workstation are distributed in sequence along a straight line.

[0008] In a preferred embodiment, the fourth motion module is vertically arranged below the first motion module, so that the first workstation, the second workstation, and the third workstation are distributed in an "L" shape.

[0009] In a preferred embodiment, the second motion module is a pneumatic slide, including a cylinder vertically mounted on the frame, a horizontal top plate connected to the piston rod of the cylinder, a horizontal pressure plate fixed to the top surface of the oil pan, a plurality of guide columns distributed around the circumference and vertically connecting the top plate and the pressure plate, and a plurality of guide sleeves mounted on the frame and slidingly matched with each of the guide columns.

[0010] In a preferred embodiment, the third motion module is an electric screw drive system, and the top surface of the silicone head is connected to the third motion module via a silicone head seat.

[0011] In a preferred embodiment, the hot air system includes an air duct connected to an external compressed air source and arranged around the positioning platform, an electric heating component for heating the air in the air duct, and air outlet gaps distributed around the inner side of the air duct.

[0012] The beneficial effects of the utility model are as follows: the printing plate is driven solely by the first motion module, and in the process of switching the workstations, inking can be completed by the ink supply device at the same time, and the ink pattern can be transferred to the silicone head by the lifting of the silicone head; the positioning platform and the supporting platform are driven as a whole by the fourth motion module, and in the process of switching the workstations, the ink pattern can be transferred to the surface of the workpiece by the lifting of the silicone head and the residual ink can be removed by the tape, and the silicone head can simultaneously complete the ink preheating through the hot air system during the descent of the corresponding positioning platform; and because the supporting platform and the positioning platform are arranged below the printing plate, the supporting platform and the printing plate can be simultaneously under the silicone head without interfering with each other, and it is only necessary to set the printing plate, the positioning platform and the supporting platform to contact the silicone head at staggered times, so that the silicone head only needs to be lifted and lowered continuously during the transfer process. Therefore, one transfer cycle of the equipment is equal to the duration of three lifts and lowerings of the silicone head, and the equipment has a compact structure and layout, which can greatly improve production efficiency. BRIEF DESCRIPTION OF THE DRAWINGS

[0013] The utility model is further described in detail below with reference to the accompanying drawings and specific embodiments.

[0014] Figure 1 The structure of the main parts of the pad printing equipment in the embodiment is shown in FIG. Figure 1 ;

[0015] Figure 2 The structure of the main parts of the pad printing equipment in the embodiment is shown in FIG. Figure 2 ;

[0016] Figure 3 It is a schematic diagram of the overall layout of the main parts of the pad printing equipment in the embodiment;

[0017] Figure 4 It is a schematic diagram of the installation structure of the positioning device, the cleaning device and the fourth motion module in the embodiment;

[0018] Figure 5 A schematic diagram of the installation structure of the ink supply device in the embodiment;

[0019] Figure 6 Schematic diagram of the transverse cross-sectional structure of the hot air system in the embodiment. DETAILED DESCRIPTION

[0020] The utility model is further described below in conjunction with the accompanying drawings:

[0021] It should be noted that the words indicating directions in the present application document, such as above, below, top surface, vertical, etc., are only for the convenience of a more intuitive description of the structure in combination with the drawings, and are not intended to limit the product structure.

[0022] refer to Figures 1 to 6A pad printing device of the present embodiment includes a frame 1 for installing various devices of the device; an inking device 2, including a printing plate 21 with a printing pattern engraved on the top surface and arranged horizontally, and a linear first motion module 22 installed on the frame 1 for driving the printing plate 21 to switch between a first station A and a second station B in a horizontal direction; an ink supply device 3 for providing ink for the printing plate 21, including an oil pan 31 arranged above the printing plate 21 corresponding to the first station A, and a linear second motion module 32 installed on the frame 1 for driving the oil pan 31 to fit the top surface of the printing plate 21, wherein the printing plate 21 can be arranged in a long strip shape, so that when it switches between the first station A and the second station B, the top surface of the printing plate 21 always keeps in contact with the bottom surface of the oil pan 31; a transfer device 4, including a silicone head 41 arranged above the printing plate 21 corresponding to the second station B, and a second motion module 32 installed on the frame 1 for driving the oil pan 31 to fit the top surface of the printing plate 21. a linear third motion module 42 for driving the silicone head 41 to rise and fall vertically; a positioning device 5, comprising a positioning table 51 for positioning a workpiece on a horizontal plane, and a hot air system 52 for supplying hot air circumferentially and upwardly around the positioning table 51; a cleaning device 6, for removing residual ink on the silicone head 41, comprising a supporting table 61, and a reeling and unreeling roller 62 for allowing the tape to step and fit across the top surface of the supporting table 61; wherein the reeling and unreeling roller 62 performs passive unloading and active reeling of the tape respectively; and a linear fourth motion module 7, mounted on the frame 1, for driving the positioning device 5 and the cleaning device 6 to move as a whole below the inking device 2 in a horizontal direction, so that the positioning table 51 and the supporting table 61 alternately enter below the second workstation B, and the contact time between the positioning table 51, the supporting table 61, and the printing plate 21 and the silicone head 41 is staggered. In other embodiments, the first motion module 22 and / or the fourth motion module 7 may also be designed as a rotating module, in which case the two sets of rotating arms may be driven by a motor and a gear set to rotate around a center point to switch between two workstations.

[0023] During operation, the workpiece is placed on the positioning table 51 manually or mechanically to fix the position, and the oil pan 31 is always kept in contact with the top surface of the printing plate 21 under the driving force provided by the second motion module 32. Therefore, the working end of the printing plate 21 engraved with a pattern can automatically complete the inking at the first station A. When it moves to the second station B under the drive of the first motion module 22, the silicone head 41 is synchronously lowered and contacts the printing plate 21 under the drive of the third motion module 42, and the ink is transferred to the bottom surface of the silicone head 41, and the printing plate 21 and the silicone head 41 are reset; and the positioning device 5 and the cleaning device 6 arranged under the printing plate 21 are driven by the fourth motion module 7. Move so that the positioning table 51 and the supporting table 61 alternately enter under the second station B. When the working end of the printing plate 21 is reset to the first station A, the positioning table 51 can be synchronously moved to under the second station B. At this time, the silicone head 41 descends again. During the descent, the hot air system 52 blows air upward from the circumference to preheat the ink on the silicone head 41 until it contacts the workpiece on the positioning table 51 to complete the transfer. When the silicone head 41 rises again, the supporting table 61 moves to under the second station B, and the silicone head 41 descends again to contact the tape to remove residual ink. At this time, the positioning table 51 can start to place the workpiece to prepare for the next pad printing cycle.

[0024] The printing plate 21 is driven independently by the first motion module 22. In the process of switching workstations, the ink supply device 3 can be used to complete the inking and the ink pattern can be transferred to the silicone head 41 by the lifting of the silicone head 41. The positioning platform 51 and the supporting platform 61 are driven as a whole by the fourth motion module 7. In the process of switching workstations, the ink pattern can be transferred to the surface of the workpiece by the lifting of the silicone head 41 and the residual ink can be removed by the tape. The silicone head 41 can simultaneously complete the ink preheating through the hot air system 52 during the descent of the corresponding positioning platform 51. Since the supporting platform 61 and the positioning platform 51 are arranged below the printing plate 21, the supporting platform 61 and the printing plate 21 can be located below the silicone head 41 at the same time without interfering with each other. It is only necessary to set the printing plate 21, the positioning platform 51 and the supporting platform 61 to contact the silicone head 41 at staggered times, so that the silicone head 41 only needs to be lifted during the transfer process. Therefore, one transfer cycle of the equipment is equal to the duration of three lifts of the silicone head 41. The equipment has a compact structure and layout, which can greatly improve production efficiency.

[0025] A preferred solution, the first motion module 22 and the fourth motion module 7 of this embodiment are both electric screw drive systems, specifically composed of a servo motor, a screw, a slide rail pair and a mounting bracket, etc. The electric screw drive system is an existing conventional technology in the mechanical field and will not be described in detail. In the reset state, the working end of the printing plate 21 corresponds to the first station A position, the support table 61 corresponds to the second station B, and the positioning table 51 corresponds to the third station C. The first motion module 22 and the fourth motion module 7 are both electric screw drive systems, which have fast speed, high precision and stronger equipment stability, which can improve production efficiency and ensure printing quality; the positioning table 51 is set corresponding to the third station C, and will not overlap with the position of the printing plate 21, which is convenient for picking up and placing workpieces. In other embodiments, the first motion module 22 and / or the fourth motion module 7 can also be set to other existing linear modules, such as cylinder linear modules, gear rack linear modules, etc.

[0026] In a preferred embodiment, the fourth motion module 7 of this embodiment is arranged in parallel below the first motion module 22, and the first station A, the second station B, and the third station C are sequentially distributed along a straight line. The first motion module 22 and the fourth motion module 7 are arranged in parallel, so that the equipment structure is arranged in a straight line. In another embodiment, the fourth motion module 7 is arranged vertically below the first motion module 22, so that the first station A, the second station B, and the third station C are distributed in an "L" shape. It can be flexibly designed according to needs to meet the needs of installation and production connection.

[0027] A preferred solution, the second motion module 32 of this embodiment is a pneumatic slide, including a cylinder 321 vertically mounted on the frame 1, a horizontal top plate 322 connected to the piston rod of the cylinder 321, a horizontal pressure plate 323 fixed to the top surface of the oil pan 31, a plurality of guide pillars 324 distributed around the circumference and vertically connecting the top plate 322 and the pressure plate 323, and a plurality of guide sleeves 325 installed on the frame 1 and slidingly matched with each of the guide pillars 324. The driving force of the cylinder 321 is transmitted to the circumference of the pressure plate 323 through the guide pillars 324 distributed around the circumference, so that the oil pan 31 is evenly pressed, making the printing more uniform.

[0028] In a preferred embodiment, the third motion module 42 of this embodiment is also an electric screw drive system, and the top surface of the silicone head 41 is connected to the third motion module 42 through a silicone head seat 43. The third motion module 42 can accurately control the moving distance of the silicone head 41, thereby ensuring the stability of the pressure during transfer and improving the printing quality.

[0029] A preferred solution, the hot air system 52 of this embodiment includes an air duct 521 connected to an external compressed air source and arranged circumferentially around the positioning platform 51, an electric heating component 522 for heating the air in the air duct 521, and air outlet gaps 523 distributed circumferentially on the inner side of the air duct 521. The hot air in the air duct 521 is compressed and blown toward the silicone head 41 from the circumferential air outlet gaps 523, which can quickly and evenly preheat the ink, thereby improving the ink preheating efficiency and printing quality. In other embodiments, the external hot air can be directly introduced into the air duct 521 and then blown out from the air outlet gap 523; or a multi-layer air duct 521 can be arranged so that the hot air enters the innermost air duct 521 layer by layer and then blown out from the air outlet gap 523.

[0030] The above description does not limit the technical scope of the present invention. Any modifications, equivalent changes and modifications made to the above embodiments based on the technical essence of the present invention are still within the scope of the technical solution of the present invention.

Claims

1. A pad printing device, characterized in that: include Rack, used to install various devices of the equipment; An inking device, comprising a printing plate with a printing pattern engraved on the top surface and arranged horizontally, and a linear or rotary first motion module installed on the frame for driving the printing plate to switch between a first station and a second station in a horizontal direction; An ink supply device, for providing ink for the printing plate, comprising an oil pan disposed above the printing plate corresponding to the first station, and a linear second motion module mounted on the frame for driving the oil pan to fit the top surface of the printing plate; The transfer device comprises a silicone head disposed above the printing plate corresponding to the second station, and a linear third motion module installed on the frame for driving the silicone head to rise and fall vertically; A positioning device, comprising a positioning table for positioning a workpiece on a horizontal plane, and a hot air system for supplying hot air circumferentially and upwardly around the positioning table; A cleaning device, used to remove residual ink on the silicone head, including a support platform and a retracting and unreeling roller that allows the tape to step and fit across the top surface of the support platform; And a fourth linear or rotary motion module is installed on the frame and is used to drive the positioning device and the cleaning device to move as a whole under the inking device in a horizontal direction, so that the positioning table and the supporting table alternately enter under the second workstation, and the contact time between the positioning table, the supporting table, and the printing plate and the silicone head is staggered.

2. A pad printing device according to claim 1, characterized in that: The first motion module and the fourth motion module are both electric screw drive systems; in the reset state, the working end of the printing plate corresponds to the first workstation position, the supporting platform corresponds to the second workstation, and the positioning platform corresponds to the third workstation.

3. A pad printing device according to claim 2, characterized in that: The fourth motion module is arranged in parallel below the first motion module, and the first station, the second station, and the third station are sequentially distributed along a straight line.

4. A pad printing device according to claim 2, characterized in that: The fourth motion module is vertically arranged below the first motion module, so that the first station, the second station, and the third station are distributed in an "L" shape.

5. The pad printing device according to claim 1, characterized in that: The second motion module is a pneumatic slide, including a cylinder vertically installed on the frame, a horizontal top plate connected to the piston rod of the cylinder, a horizontal pressure plate fixed to the top surface of the oil pan, a plurality of guide columns distributed around the circumference and vertically connecting the top plate and the pressure plate, and a plurality of guide sleeves installed on the frame and slidingly matched with each of the guide columns.

6. A pad printing device according to claim 1, characterized in that: The third motion module is an electric screw drive system, and the top surface of the silicone head is connected to the third motion module via a silicone head seat.

7. The pad printing device according to claim 1, characterized in that: The hot air system comprises an air duct connected to an external compressed air source and arranged around the positioning platform, an electric heating component for heating the air in the air duct, and air outlet gaps distributed around the inner side of the air duct.

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