A circular 360-degree pad printing device

Abstract

This utility model discloses a 360-degree circular pad printing device, including a frame, a printing mechanism installed in front of the frame, an ink placement platform located inside the frame, and a workpiece displacement mechanism located in front of the frame that works in conjunction with the printing mechanism. The workpiece displacement mechanism includes a low platform, a lead screw reciprocating moving seat fixedly installed above the low platform, a slide plate mounted on the lead screw reciprocating moving seat, support bars fixedly installed on both sides of the lead screw reciprocating moving seat by bolts, a rack fixedly mounted by the two support bars, and a mold-forming mechanism fixedly installed on the slide plate that works in conjunction with the rack to perform 360-degree rotational pad printing. This utility model, through the workpiece displacement mechanism working in conjunction with the printing mechanism, can achieve continuous, stable, accurate, and fast 360-degree full-circle printing of the workpiece, improving production efficiency and printing quality.

Description

Technical Field

[0001] This utility model relates to a circular 360-degree pad printing device. Background Technology

[0002] Pad printing machines are widely used in the printing of logos, patterns, and text on various electronic products such as buttons, mobile phone keyboards, electronic panels, telephones, game consoles, and hardware and plastic objects such as watches, toys, pens, electronics, electrical appliances, plastics, leather, metal, glass, light industry, and food packaging. Special models can also be designed for special product needs.

[0003] Taking toy printing as an example, existing pad printing machines have the following problems: First, for the side of a circular toy workpiece with a round shell, traditional pad printing machines can usually only print a plane or a section of arc. To complete the printing of the entire circumference, the operator needs to manually rotate the workpiece multiple times and perform multiple color printing, which easily leads to problems such as misalignment or uneven ink volume, and cannot achieve a perfect and seamless circular pattern; Second, the traditional multiple clamping and multiple printing process is not only inefficient, but also heavily dependent on the operator's skill level. Each loading, unloading and rotation will produce human error in the toy workpiece, resulting in inconsistent printing positions and low product yield. Summary of the Invention

[0004] In view of the shortcomings of the existing technology, the purpose of this utility model is to provide a circular 360-degree pad printing device.

[0005] The technical solution adopted by this utility model to solve its technical problem is:

[0006] A 360-degree circular pad printing device includes a frame, a printing mechanism installed in front of the frame, an ink placement platform located inside the frame, and a workpiece displacement mechanism located in front of the frame and working in conjunction with the printing mechanism. The workpiece displacement mechanism includes a low platform, a lead screw reciprocating moving seat fixedly installed above the low platform, a slide plate mounted on the lead screw reciprocating moving seat, support bars fixedly installed on both sides of the lead screw reciprocating moving seat by bolts, a rack fixedly mounted by the two support bars, and a mold-forming mechanism fixedly installed on the slide plate and working in conjunction with the rack to perform 360-degree rotational pad printing.

[0007] Preferably, the die-casting mechanism includes a base plate fixed to the slide plate by bolts, support arms vertically welded to both sides above the base plate and with studs at the top, an annular seat located between the two support arms and fixed by studs, a bearing seat fitted inside the annular seat, a rotating shaft passing through the annular seat and assembled with the bearing seat, an anti-disengagement clasp fitted at one end of the rotating shaft to prevent the rotating shaft from disengaging from the bearing seat, a gear fitted on the rotating shaft and located behind the annular seat, a gear fixing bolt passing through the center of the gear and screwed into the rotating shaft to prevent the gear from loosening, a workpiece die fitted on the rotating shaft and located in front of the annular seat, a die-casting fixing bolt passing through the center of the workpiece die and screwed into the rotating shaft to prevent the workpiece die from loosening, and a pad-printing workpiece fitted on the workpiece die and rotating with the workpiece die to perform pad-printing.

[0008] Furthermore, an annular baffle is integrally formed on the side of the ring seat facing the gear.

[0009] Furthermore, the rotating shaft includes a bearing housing assembly section, a convex ring section integrally formed on the bearing housing assembly section and having a radius larger than that of the bearing housing sleeve section, a gear assembly section located at one end of the bearing housing assembly section with flattened sides, a mold assembly section located at the other end of the bearing housing assembly section with flattened sides, and an annular groove formed on the mold assembly section near the bearing housing assembly section, similar to the insertion of an anti-disengagement retaining ring.

[0010] Furthermore, a workpiece slot is provided on the side of the workpiece mold facing the pad-printed workpiece.

[0011] Preferably, the frame includes a frame body, a movable frame mounted on the frame body for fixing the printing mechanism, and a cylinder mounting base fixed on the movable frame. The frame body is equipped with a guide rail, a movable frame drive screw, a screw servo motor, and a screw sleeve. The guide rail is fixedly mounted on the top of the frame body by bolts. The movable frame drive screw is fixedly mounted on both sides of the top of the frame body by bearings and is movably assembled with the movable frame with a slider. The screw servo motor is fixedly mounted to the frame body by bolts, and its output end is connected to the movable frame drive screw by a coupling. The screw sleeve is fitted on the movable frame drive screw and fixedly connected to the movable frame by a connecting plate.

[0012] Preferably, the printing mechanism includes two telescopic cylinders with downward-facing output ends, a lower pressure plate fixed to the output ends of the two telescopic cylinders by bolts, and a transfer head fixedly installed below the lower pressure plate.

[0013] Preferably, the ink placement table includes a table plate, a positioning frame welded to the table plate, and ink cartridges placed on the positioning frame and fixed by the positioning frame.

[0014] The beneficial effects of this utility model are as follows:

[0015] 1. By cooperating with the rack in the workpiece displacement mechanism and the gear in the mold mechanism, the workpiece itself is driven to rotate precisely and continuously 360 degrees under the printing head. The printing head remains stationary in the downward pressure state. During the rotation of the workpiece, the ink is transferred to the entire circumference surface, thus realizing one-time, seamless, full-circumference printing.

[0016] 2. After the pad printing workpiece is installed, its feeding, rotation, and printing processes are all completed automatically without manual intervention. Moreover, the moving frame is controlled up and down by a lead screw servo motor, ensuring high precision. The flattened assembly section on the rotating shaft prevents slippage between the gears and the workpiece mold, ensuring the accuracy of the rotation angle. The workpiece slots ensure that the workpieces are installed in the same position, guaranteeing that the printing position of each pad printing workpiece is exactly the same, which helps to improve production efficiency and product consistency. Attached Figure Description

[0017] Figure 1 This is a structural diagram of a 360-degree circular pad printing device according to the present invention;

[0018] Figure 2 for Figure 1 Structural diagram of the central frame in conjunction with the printing mechanism and ink placement table;

[0019] Figure 3 for Figure 1 Structural diagram of the workpiece displacement mechanism;

[0020] Figure 4 for Figure 3 Exploded view of the middle mold mechanism. Detailed Implementation

[0021] The present invention will be further described below with reference to the accompanying drawings and specific embodiments, so that those skilled in the art can better understand the present invention and implement it. However, the embodiments are not intended to limit the present invention.

[0022] Example

[0023] A circular 360-degree pad printing device, such as Figure 1-4 As shown, it includes a frame 1, a printing mechanism 2 installed in front of the frame 1, an ink placement platform 3 located inside the frame 1, and a workpiece displacement mechanism 4 located in front of the frame 1 and working in conjunction with the printing mechanism 2.

[0024] The frame 1 includes a frame body 11, a movable frame 12 mounted on the frame body 11 for fixing the printing mechanism 2, and a cylinder mounting seat 13 fixedly mounted on the movable frame 12. The frame body 11 is equipped with a guide rail 111, a movable frame drive screw 112, a screw servo motor 113, and a screw sleeve 114. The guide rail 111 is fixedly mounted on the top of the frame body 11 by bolts. The movable frame drive screw 112 is fixedly mounted on both sides of the top of the frame body 11 by bearings and is movably assembled with the movable frame 12 with a slider. The screw servo motor 113 is fixedly mounted to the frame body 11 by bolts, and its output end is connected to the movable frame drive screw 112 by a coupling. The screw sleeve 114 is fitted on the movable frame drive screw 112 and is fixedly connected to the movable frame 12 by a connecting plate. Specifically, the guide rail 111 and the moving frame drive screw 112, in conjunction with the screw servo motor 113, can precisely control the up and down movement position and speed of the printing mechanism. The screw servo motor 113 is controlled by the programming system to achieve fully automatic cyclic movement, and the printing pressure and pressing position are precisely controlled, reducing the instability of manual operation.

[0025] The printing mechanism 2 includes two telescopic cylinders 21 with their output ends facing downwards, a lower pressure plate 22 fixed to the output ends of the two telescopic cylinders 21 by bolts, and a transfer head 23 fixedly installed below the lower pressure plate 22. Specifically, the two telescopic cylinders 21 are placed in the cylinder mounting base 13 and fixed by bolts.

[0026] The ink placement table 3 includes a table plate 31, a positioning frame 32 welded onto the table plate 31, and ink cartridges 33 placed on the positioning frame 32 and fixed by the positioning frame 32. Specifically, the positioning frame 32 can ensure that the ink cartridges 33 are stably placed and offset, eliminate manual placement errors, and facilitate the rapid ink application of the printing head 23.

[0027] The workpiece displacement mechanism 4 includes a low platform 41, a lead screw reciprocating moving seat 42 fixedly installed above the low platform 41, a slide plate 43 mounted on the lead screw reciprocating moving seat 42, support bars 44 fixedly installed on both sides of the lead screw reciprocating moving seat 42 by bolts, a rack 45 fixedly mounted by the two support bars 44, and a mold-making mechanism 46 fixedly installed on the slide plate 43 and cooperating with the rack 45 to perform 360-degree rotation and transfer printing.

[0028] The molding mechanism 46 includes a base plate 4601 bolted to the slide plate 43, support arms 4602 vertically welded to the upper sides of the base plate 4601 and with studs at the top, an annular seat 4603 located between the two support arms 4602 and fixed by studs, a bearing seat 4604 fitted inside the annular seat 4603, a rotating shaft 4605 passing through the annular seat 4603 and assembled with the bearing seat 4604, an anti-disengagement retaining ring 4607 fitted at one end of the rotating shaft 4605 to prevent the rotating shaft 4605 from disengaging from the bearing seat 4604, and a retaining ring 4607 fitted on the rotating shaft 4604. The gear 4608 on the ring seat 4603 and located behind it, the gear fixing bolt 4609 which passes through the center of the gear 4608 and is screwed into the rotating shaft 4605 to prevent the gear 4608 from loosening, the workpiece mold 4610 which is fitted on the rotating shaft 4605 and located in front of the ring seat 4603, the mold fixing bolt 4611 which passes through the center of the workpiece mold 4610 and is screwed into the rotating shaft 4605 to prevent the workpiece mold 4610 from loosening, and the pad printing workpiece 4612 which is fitted on the workpiece mold 4610 and is used for pad printing as the workpiece mold 4610 rotates.

[0029] It should be further explained that the cooperation between rack 45 and gear 4608 provides the power basis for the rotation of pad printing workpiece 4612, which combines linear motion with rotational motion. This solves the industry problem that traditional pad printing machines cannot perform one-time, seamless, and high-precision printing on the side of ring-shaped workpieces, greatly improving production efficiency and printing quality. Moreover, the cooperation between bearing seat 4604 and rotating shaft 4605 reduces rotational friction resistance, ensuring smoothness and accuracy of rotation, and laying the foundation for high-quality seamless printing. In addition, the gear fixing bolt 4609 and mold fixing bolt 4611 enable quick installation, disassembly, and fastening of gears and workpiece molds, facilitating the replacement of different models of workpiece molds to meet production needs, while preventing loosening during high-speed reciprocating motion.

[0030] An annular baffle 46031 is integrally formed on the side of the annular seat 4603 facing the gear 4608. Specifically, after the bearing seat 4604 is installed, the annular baffle 46031 prevents the bearing seat 4604 from detaching from the annular seat 4603. Moreover, the integrally formed annular baffle 46031 plays a role in axial positioning, which can effectively prevent the bearing seat 4604 from coming out of the annular seat 4603 during operation. This simplifies the assembly process, eliminates the need for additional snap rings or pressure caps, and enhances the rigidity and stability of the entire rotating support unit, ensuring long-term operational reliability and reducing maintenance requirements.

[0031] The rotating shaft 4605 includes a bearing housing assembly section 46051, a convex ring section 46052 integrally formed on the bearing housing assembly section 46051 and having a radius larger than that of the bearing housing sleeve section 46051, a gear assembly section 46053 located at one end of the bearing housing assembly section 46051 with flattened sides, a mold assembly section 46054 located at the other end of the bearing housing assembly section 46051 with flattened sides, and an annular groove 46055 formed on the mold assembly section 46054 near the end of the bearing housing assembly section 46051, which is the same as the groove for the anti-disengagement retaining ring 4607. Specifically, the convex ring section 46052 and the annular groove 46055, together with the anti-disengagement circumferential ring, constitute a bidirectional axial positioning system, ensuring that the rotating shaft will not move axially within the bearing housing. The flattened design on both sides of the gear assembly section 46053 and the die assembly section 46054 allows them to form a tight fit with the holes of the gear 4608 and the workpiece die 4610 without relative rotation, i.e., a D-type hole fit. This makes the transmission of torque more reliable and avoids the processing complexity and clearance problems caused by using key connections.

[0032] The workpiece mold 4610 has a workpiece slot 46101 on the side facing the pad printing workpiece 4612. Specifically, this allows the pad printing workpiece 4612 to be stably assembled on the workpiece mold 4610 after being inserted into the workpiece slot 46101. In addition, the workpiece slot 46101 enables quick and accurate positioning and clamping of the pad printing workpiece 4612, avoiding the tedious process of manual alignment every time the workpiece is installed, greatly improving production efficiency, and ensuring that the workpiece will not shift or loosen during high-speed rotary printing, ensuring consistent printing position for each product and improving product yield.

[0033] The above embodiments of this utility model are not intended to limit the scope of protection of this utility model. The implementation of this utility model is not limited thereto. All other modifications, substitutions or alterations made to the above structure of this utility model based on the above content of this utility model and in accordance with the common technical knowledge and conventional means in the field, without departing from the basic technical idea of ​​this utility model, shall fall within the scope of protection of this utility model.

Claims

1. A circular ring 360 degree pad printing device, comprising a frame, a printing mechanism installed in front of the frame, an ink placement table located in the interior of the frame, and a workpiece displacement mechanism located in front of the frame and working in cooperation with the printing mechanism, characterized in that, The workpiece displacement mechanism includes a low platform, a lead screw reciprocating moving seat fixedly installed above the low platform, a slide plate assembled on the lead screw reciprocating moving seat, support bars fixedly installed on both sides of the lead screw reciprocating moving seat by bolts, a rack fixedly assembled by the two support bars, and a mold-making mechanism fixedly installed on the slide plate and cooperating with the rack to perform 360-degree rotation and transfer printing.

2. The toroidal 360 degree pad printing apparatus of claim 1, wherein, The die-casting mechanism includes a base plate fixed to the slide plate by bolts, support arms vertically welded to both sides above the base plate with studs at the top, an annular seat located between the two support arms and fixed by studs, a bearing seat fitted inside the annular seat, a rotating shaft passing through the annular seat and assembled with the bearing seat, an anti-disengagement clasp fitted at one end of the rotating shaft to prevent the rotating shaft from disengaging from the bearing seat, a gear fitted on the rotating shaft and located behind the annular seat, a gear fixing bolt passing through the center of the gear and screwed into the rotating shaft to prevent the gear from loosening, a workpiece die fitted on the rotating shaft and located in front of the annular seat, a die-casting fixing bolt passing through the center of the workpiece die and screwed into the rotating shaft to prevent the workpiece die from loosening, and a pad-printing workpiece fitted on the workpiece die and rotating with the workpiece die for pad-printing.

3. The toroidal 360 degree pad printing apparatus of claim 2, wherein, The annular seat has an integrally formed annular baffle on the side facing the gear.

4. The toroidal 360 degree pad printing apparatus of claim 2, wherein, The rotating shaft includes a bearing housing assembly section, a convex ring section integrally formed on the bearing housing assembly section and having a radius larger than that of the bearing housing sleeve section, a gear assembly section located at one end of the bearing housing assembly section with flattened sides, a mold assembly section located at the other end of the bearing housing assembly section with flattened sides, and an annular groove formed at the end of the mold assembly section near the bearing housing assembly section, which is similar to the insertion of an anti-disengagement retaining ring.

5. The toroidal 360 degree pad printing apparatus of claim 2, wherein, The workpiece mold has a workpiece slot on the side facing the pad-printed workpiece.

6. The toroidal 360 degree pad printing apparatus of claim 1, wherein, The frame includes a frame body, a movable frame mounted on the frame body for fixing the printing mechanism, and a cylinder mounting base fixed on the movable frame. The frame body is equipped with guide rails, a movable frame drive screw, a screw servo motor, and a screw sleeve. The guide rails are fixedly mounted on the top of the frame body with bolts. The movable frame drive screw is fixedly mounted on both sides of the top of the frame body with the assistance of bearings and is movably assembled with the movable frame with a slider. The screw servo motor is fixedly mounted to the frame body with bolts, and its output end is connected to the movable frame drive screw through a coupling. The screw sleeve is fitted on the movable frame drive screw and is fixedly connected to the movable frame through a connecting plate.

7. The toroidal 360 degree pad printing apparatus of claim 1, wherein, The printing mechanism includes two telescopic cylinders with their output ends pointing downwards, a lower pressure plate that is fixed to the output ends of the two telescopic cylinders by bolts, and a transfer head that is fixedly installed below the lower pressure plate.

8. The toroidal 360 degree pad printing apparatus of claim 1, wherein, The ink placement table includes a table plate, a positioning frame welded to the table plate, and ink cartridges placed on the positioning frame and fixed by the positioning frame.

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