Screen printing device for cosmetic container

Abstract

The invention belongs to the technical field of printing, and particularly relates to a cosmetic container screen printing device which comprises a machine base, a printing mechanism is arranged on the upper side of the machine base, and a feeding mechanism is arranged on the front side of the machine base. The feeding mechanism comprises a first guide rail, a clamping device, a rotary disc and material discs, and by arranging the feeding mechanism, when silk-screen printing is conducted on the cosmetic container, feeding and discharging distribution can be achieved through the material discs which are cyclically and alternately arranged, the waiting time needed by machining is shortened, and the continuous operation of feeding, discharging and preparation in machining is improved; due to the external material disc and the clamping device capable of pulling the material disc, the printing mechanism cannot block and shield feeding and discharging operation, and operation is more convenient and safer; and by arranging the stabilizing assembly, the state stability of the cosmetic container during printing processing can be further improved, and then the requirement for improving the printing effect is met.

Description

Technical Field

[0001] The present invention belongs to the technical field of printing, and particularly relates to a silk screen printing device for cosmetic boxes. Background Art

[0002] Screen printing is a printing method that uses a screen plate engraved with a hollow pattern or text, and uses a squeegee or other tools to make the ink pass through the hollow area to achieve printing. Currently, in the printing of cosmetic boxes, since most cosmetic boxes are produced in the form of multiple interconnected cosmetic boxes during the injection molding process, that is, there will be plastic strips between adjacent cosmetic boxes. This is to improve production efficiency and produce more cosmetic boxes in a single injection molding, and then cut and polish the excess plastic strips in the later stage, while printing is mostly carried out between cutting the plastic strips.

[0003] Currently, common screen printing devices mostly require manual placement of the plate-shaped packaging boxes at the designated position and accurate alignment before printing when printing cosmetic boxes. After completion, the packaging boxes are taken out and then reloaded, thus forming a cycle. However, such a method has low processing continuity, long processing waiting and loading / unloading preparation times. At the same time, such a loading / unloading method is easily blocked by the screen plate or other processing component structures, and it is more difficult to align the loading / unloading. Often, the device needs to adjust its height position every time printing is carried out to adapt to the needs of loading / unloading, thereby affecting the overall processing efficiency. Summary of the Invention

[0004] The purpose of the present invention is to provide a silk screen printing device for cosmetic boxes to solve the problems mentioned in the background art.

[0005] To achieve the above technical purpose, the technical solution adopted by the present invention is as follows: A silk screen printing device for cosmetic boxes includes a machine base, a printing mechanism is provided on the upper side of the machine base, and a loading mechanism is provided on the front side of the machine base; The loading mechanism includes a first guide rail, a gripper, a turntable and a material tray. The first guide rail is provided in the middle of the upper end of the machine base, and its slidable direction is in the front-back direction. The gripper is slidably connected to the first guide rail. The turntable is provided on the front side of the machine base and corresponds to the position of the gripper. The material tray is provided on the turntable, and the number is at least two; The turntable includes a frame, a carrier plate and a transmission wheel. The frame is fixedly connected to the machine base. The carrier plate is rotatably provided in the frame. The transmission wheel is provided at the lower end of the carrier plate and is concentric with it. The material tray is provided on the carrier plate and is connected and matched with the gripper.

[0006] Further, the printing mechanism includes a longitudinal guide rail, a transverse guide rail, a fixture and a squeegee. The longitudinal guide rail is provided at the rear side of the upper end of the machine base. The transverse guide rail is slidably connected up and down with the longitudinal guide rail. There are two fixtures which are respectively fixed at the left and right ends of the transverse guide rail. The squeegee is slidably provided left and right on the transverse guide rail.

[0007] Further, an annular groove is formed in the side of the carrier plate. The groove body of the annular groove is composed of a first inner groove and a first notch which are communicated with each other. The first notch is the opening part. The vertical section of the first inner groove of the annular groove is circular, and the opening size of the first notch is the same as the inner groove diameter of the first inner groove.

[0008] Further, a fitting groove is formed in the turntable. The material tray is slidably fitted in the fitting groove, and the two material trays cooperate with the turntable to make the turntable as a whole in a disc structure. A connecting groove matching the position of the annular groove is formed in the side of the material tray. The groove body of the connecting groove is composed of a second inner groove and a second notch which are communicated with each other. The second notch is the opening part. The shape and structure of the second inner groove are the same as those of the first inner groove, and the opening size of the second notch is smaller than the maximum inner diameter size of the second inner groove.

[0009] Further, the gripper includes a traction body and a pull ring. The traction body is slidably connected to the first guide rail, and the pull ring is connected to the traction body and the vertical section structure thereof matches that of the connecting groove.

[0010] Further, an electromagnet is provided on the pull ring, and a traction magnet matching the electromagnet is provided in the second inner groove.

[0011] Further, a stabilizing assembly is further provided between the material tray and the turntable. The stabilizing assembly includes a plurality of adsorbers. The plurality of adsorbers are evenly arranged in the material tray. An air path communicating with the fitting groove is formed at the center of the transmission wheel. The material tray is provided with an air distribution groove communicating with the air path. The plurality of adsorbers are in air path communication with the air distribution groove.

[0012] Further, the adsorber includes a suction cup, a telescopic tube, a tail plate, a lower bracket, a limiting ring and an air valve. An air cavity communicating the air path and the outside is formed in the material tray. The adsorber is arranged in the air cavity. Both the lower bracket and the limiting ring are fixedly arranged in the air cavity, and the limiting ring is located above the lower bracket. The tail plate is slidably sealed in the air cavity and is located between the lower bracket and the limiting ring. The telescopic tube is concentrically connected with the tail plate and slidably seals and extends out of the air cavity. The suction cup is connected to the telescopic tube and is located above the material tray. A passage is formed in the telescopic tube, the suction cup and the tail plate in common. The air valve is arranged in the passage. The lower bracket is provided with an extension rod extending upward and slidably sealingly connected with the passage. The extension rod is hollow and the hollow part penetrates through the lower bracket.

[0013] The present application has at least the following advantages compared with the prior art: Through the setting of the feeding mechanism, when screen printing the cosmetic box, the diversion of loading and unloading can be realized through the circulating and alternating material trays, reducing the waiting time required for processing, and improving the continuous operation of loading, unloading and preparation; the external material tray and the gripper that can tow the material tray make the printing mechanism not block or obscure the loading and unloading operation, making the operation more convenient and safe; the setting of the stabilizing component can further improve the stability of the cosmetic box during printing processing, so as to meet the need of improving the printing effect. BRIEF DESCRIPTION OF THE DRAWINGS

[0014] The present invention can be further illustrated by the non-limiting embodiments given in the accompanying drawings.

[0015] Figure 1 It is a schematic structural diagram of the present invention.

[0016] Figure 2 It is a schematic structural diagram of another angle of the present invention.

[0017] Figure 3 It is a structural sectional view of the present invention.

[0018] Figure 4 is Figure 3 an enlarged schematic view of part A in

[0019] Figure 5 It is a schematic structural diagram of the turntable and the material tray of the present invention.

[0020] Figure 6 It is a structural sectional view of the turntable and the material tray of the present invention.

[0021] Figure 7 It is a structural sectional view of the stabilizing component of the present invention.

[0022] Machine base 1, first guide rail 11, material tray 2, fitting groove 21, frame 3, carrier plate 31, transmission wheel 32, longitudinal guide rail 4, transverse guide rail 41, fixture 42, ink scraper 43, first inner groove 5, first notch 51, second inner groove 6, second notch 61, traction body 7, pull ring 71, gas circuit 8, gas distribution groove 81, suction cup 82, telescopic tube 83, end plate 84, lower bracket 85, limiting ring 86, air valve 87, air cavity 88, passage 89, extension rod 9. DETAILED DESCRIPTION OF THE EMBODIMENTS

[0023] In order to enable those skilled in the art to better understand the present invention, the technical solutions of the present invention will be further described below with reference to the accompanying drawings and embodiments.

[0024] Embodiment 1: As Figure 1-7 shown, a silk screen printing device for a cosmetic box includes a machine base 1, a printing mechanism is provided on the upper side of the machine base 1, and a feeding mechanism is provided on the front side of the machine base 1; The feeding mechanism includes a first guide rail 11, a gripper, a turntable and a material tray 2. The first guide rail 11 is arranged in the middle of the upper end of the machine base 1, and the slidable direction is in the front-back direction. The gripper is slidably connected to the first guide rail 11. The turntable is arranged on the front side of the machine base 1 and corresponds to the position of the gripper. The material tray 2 is arranged on the turntable, and the number is at least two; The turntable includes a frame 3, a carrier plate 31 and a transmission wheel 32. The frame 3 is fixedly connected to the machine base 1. The carrier plate 31 is rotatably arranged in the frame 3. The transmission wheel 32 is arranged at the lower end of the carrier plate 31 and is concentric with it. The material tray 2 is arranged on the carrier plate 31 and is connected and matched with the gripper.

[0025] Before screen printing the surface of the injection-molded cosmetic box, according to the required printing pattern, the screen plate is installed in the printing mechanism, and then printing parameters are set by using a control device such as an industrial computer or any other device with control capabilities. In this application, it can be realized by a computer cooperating with corresponding industrial control software. This method is a conventional and existing control processing method in the current field; When the equipment debugging parameters are completed, printing can be prepared at this time. The turntable in the feeding mechanism is rotated by an external transmission mechanism or device. The external transmission mechanism can use direct drive by a motor or indirect transmission such as a belt pulley, gear or chain. The transmission wheel 32 is used as a connecting part for connecting the external transmission device and synchronously driving the carrier plate 31. In this application, an external motor drives a concentrically connected runner through an output shaft, and then the runner and the transmission wheel 32 are wound and connected by a belt for rotational drive. The rotation mode is intermittent rotation, so that the carrier plate 31 performs intermittent cyclic motion in the frame 3 according to the quantity and position of the material tray 2 during the rotation process. In this way, the operator can perform loading and unloading operations only in front of the machine base 1; When a version of cosmetic boxes is placed and stabilized on one of the material trays 2, the turntable starts to drive the corresponding material tray 2 towards the first guide rail 11. In the initial state, the gripper maintains a connection preparation state with the carrier plate 31. Only when the material tray 2 loaded with materials is ready for printing, the gripper grabs the corresponding material tray 2 and detaches it from the carrier plate 31 and moves along the direction of the first guide rail 11 until it reaches the printing position of the corresponding printing mechanism. At this time, printing starts. After printing is completed, the gripper drives the material tray 2 to return to its original position, and under the drive of the turntable, the next material tray 2 ready for printing is connected to the gripper. At the same time, the printed material tray 2 corresponds to the loading and unloading position. In this way, loading and unloading operations can be carried out more conveniently, reducing the preparation waiting time and operation complexity of manual loading and unloading, improving the continuity of printing. At the same time, the material tray 2 and the gripper can form direct alignment. Compared with the method of manually placing the cosmetic box under the screen plate that is blocked, the alignment difficulty is lower, there is no personnel intervention, it is safer, and it is more conducive to the needs of printing operations.

[0026] The printing mechanism includes a longitudinal guide rail 4, a transverse guide rail 41, a clamp 42 and a squeegee 43. The longitudinal guide rail 4 is arranged at the rear side of the upper end of the machine base 1. The transverse guide rail 41 is slidably connected to the longitudinal guide rail 4 up and down. There are two clamps 42 which are respectively fixed at the left and right ends of the transverse guide rail 41. The squeegee 43 is slidably arranged on the transverse guide rail 41 left and right.

[0027] In this application, the printing mechanism specifically refers to the entire mechanism for screen printing. Among them, the longitudinal guide rail 4 and the transverse guide rail 41 are used to adjust the height position of the squeegee 43 and the left and right scraping processing actions. The clamp 42 is a fixing tool for clamping the screen plate. Specifically, between the longitudinal guide rail 4 and the transverse guide rail 41, and between the squeegee 43 and the transverse guide rail 41, the movement on the corresponding tracks is realized by using a slidable seat that can be electrified and moved. The slidable seat is a car-shaped connecting seat with a moving function, and it realizes the movement by driving the rollers to rotate through the rotation of the motor. Of course, other methods such as the cooperation of the motor and the screw can also be used to meet the movement requirements of the corresponding components. In this application, it is only used as an implementable method. The clamp 42 uses a screw to connect the clamping plate and cooperates with a fixed C-shaped clamping plate to meet the clamping requirements of the screen plate. Of course, other clamping and fixing methods such as hydraulic cylinders can also be used for the specific clamping method. And the squeegee 43 specifically refers to a printing device that at least has a scraping plate, an ink outlet pipe and an ink return pipe. It covers the printing ink on the screen plate through an external ink supply device, forms a left and right horizontal movement on the transverse guide rail 41, and then brushes the ink out from the hollow part of the screen plate, and finally recovers the excess ink through the ink return pipe to achieve the basic effect of printing. Of course, this is also an implementable method for realizing basic printing disclosed in this application, and it is also a technical means well-known and adoptable by those skilled in the art. Therefore, the existing technical features will not be elaborated too much.

[0028] A ring groove is formed on the side of the carrier plate 31. The groove body of the ring groove is composed of a first inner groove 5 and a first notch 51 that are interconnected. The first notch 51 is the opening part. The vertical section of the first inner groove 5 of the ring groove is circular, and the opening size of the first notch 51 is the same as the inner groove diameter of the first inner groove 5.

[0029] The first inner groove 5 and the first notch 51 are interconnected and have the same size, which can meet the waiting state requirements of the gripper and avoid the gripper affecting the position adjustment of the material tray 2.

[0030] The turntable is provided with a fitting groove 21. The material tray 2 is slidably fitted in the fitting groove 21. And the two material trays 2 cooperate with the turntable to make the turntable as a whole in a disc structure. A connection groove matching the position of the ring groove is formed on the side of the material tray 2. The groove body of the connection groove is composed of a second inner groove 6 and a second notch 61 that are interconnected. The second notch 61 is the opening part. The shape structure of the second inner groove 6 is the same as that of the first inner groove 5, and the opening size of the second notch 61 is smaller than the maximum inner diameter size of the second inner groove 6.

[0031] The fitting groove 21 is used to connect and support the material tray 2. The connection and support methods can adopt the fitting connection and sliding method of the protruding part, or directly adopt other guide rail connection methods. The structural dimensions and positions of the second inner groove 6 and the first inner groove 5 are the same to meet the standby state requirements of the gripper and avoid abutment between components. The size structure of the second notch 61 is smaller than that of the first notch 51 and also smaller than the structure of the first inner groove 5, enabling the gripper to generate traction and dragging on the material tray 2, thereby meeting the loading and unloading requirements of printing. It should be noted that to improve the fitting stability of the material tray 2, the material tray 2 and the fitting groove 21 can be positionally limited by means such as Velcro and magnets, while being able to quickly respond to the connection and detachment states of the material tray 2.

[0032] The gripper includes a traction body 7 and a pull ring 71. The traction body 7 is slidably connected to the first guide rail 11, and the pull ring 71 is connected to the traction body 7 and the vertical cross-sectional structure matches the connection groove.

[0033] Specifically, when the gripper pulls the material tray 2 and when the gripper is connected to the carrier plate 31 in the standby state, the pull ring 71 of the traction device has an arc structure concentric with the carrier plate 31. At the same time, the structural dimensions of the pull ring 71 are the same as those of the first inner groove 5 and the second inner groove 6, so that the pull ring 71 can maintain relative stability in position and state in the first inner groove 5 and the second inner groove 6 and are not affected by each other under the rotational movement state of the carrier plate 31. Also, because the vertical cross-sectional structure of the pull ring 71 matches the connection groove, that is, the connection part of the pull ring 71 and the traction body 7 is actually smaller in size structure than the first inner groove 5 and the second inner groove 6. Therefore, with the cooperation of the pull ring 71 and the second notch 61, the pull ring 71 can pull the material tray 2 when the traction body 7 slides along the first guide rail 11. At the same time, because the pull ring 71 has an arc structure, the relative position and state between the pull ring 71 and the material tray 2 can be kept stable, better meeting the printing requirements.

[0034] The pull ring 71 is provided with an electromagnet, and the second inner groove 6 is provided with a traction magnet matching the electromagnet.

[0035] The setting of the electromagnet can form an electromagnetic adsorption effect after the pull ring 71 is connected to the material tray 2 to improve the position stability of the material tray 2 and avoid the position deviation of the material tray 2 caused by external forces.

[0036] Embodiment 2: A stabilizing component is further provided between the material tray 2 and the turntable. The stabilizing component includes a plurality of adsorbers. The plurality of adsorbers are evenly arranged in the material tray 2. An air path 8 communicating with the fitting groove 21 is opened at the center of the transmission wheel 32. The material tray 2 is provided with a gas distribution groove 81 communicating with the air path 8, and the plurality of adsorbers are in gas path communication with the gas distribution groove 81 and the air path 8.

[0037] The adsorber includes a suction cup 82, a telescopic tube 83, a tail plate 84, a lower bracket 85, a limiting ring 86 and an air valve 87. The material tray 2 is provided with an air cavity 88 communicating with the air passage 8 and the outside. The adsorber is arranged in the air cavity 88. Both the lower bracket 85 and the limiting ring 86 are fixedly arranged in the air cavity 88, and the limiting ring 86 is located above the lower bracket 85. The tail plate 84 is slidably sealed in the air cavity 88 and is located between the lower bracket 85 and the limiting ring 86. The telescopic tube 83 is concentrically connected with the tail plate 84 and slidably seals and extends out of the air cavity 88. The suction cup 82 is connected to the telescopic tube 83 and is located above the material tray 2. The telescopic tube 83, the suction cup 82 and the tail plate 84 jointly form a passage 89. The air valve 87 is arranged in the passage 89. The lower bracket 85 is provided with an extension rod 9 extending upward and slidably and sealingly connected to the passage 89. The extension rod 9 is hollow and the hollow part penetrates through the lower bracket 85.

[0038] Furthermore, since the completed cosmetic boxes after injection molding are usually in a state of being jointly connected for the convenience of printing, that is, there are redundant plastic strips between them. When they are placed on the material tray 2, due to the ductility and deformation of the plastic, the cosmetic boxes may be lifted, tilted, etc. This will affect the subsequent printing accuracy and cause problems such as misalignment. Therefore, during the feeding process, after the cosmetic boxes are placed on the material tray 2, the adsorber can be vacuum suctioned by an external air supply device such as a vacuum pump. When negative pressure is generated, the suction cup 82 arranged in the air cavity 88 communicates with the air cavity 88 through the hollow part of the telescopic tube 83 and the extension rod 9, and then negative pressure suction is generated. At this time, the suction cup 82 can actively adsorb the surface of the cosmetic box. Until it is firmly adsorbed and cannot be further suctioned, the vacuum force will act on the tail plate 84, causing the tail plate 84 and the telescopic tube 83 to slide downward along the extension rod 9. In this way, the suction cup 82 will drive the cosmetic box to move downward, applying a fixing force on the one hand and a downward pulling force on the other hand, so as to achieve the effect of stable adsorption. Further, due to the setting of the air valve 87, the suction cup 82 itself can maintain the effect of vacuum adsorption to meet the stable adsorption requirement after the material tray 2 is separated from the carrier plate. The air valve 87 is a two-way air valve 87, and a certain air pressure is required to open it. Therefore, the air valve 87 itself can maintain the relative stability of the pressure to achieve stable vacuum adsorption; It should be noted that in order to further ensure the fixation of the position of the entire suction cup 82, the setting position of the air valve 87 can also be set in the extension rod 9 or other positions in the air cavity 88 to avoid the warping caused by the self-deformation and bending of the plastic strips connected to the cosmetic boxes. Of course, grooves matching the suction cup 82 can also be opened on the material tray 2 so that the suction cup 82 is embedded in the material tray 2 to avoid protrusions and a certain downward movement stroke affecting printing; After printing is completed, at this time, air can be input through the air passage 8 to increase the pressure. When air is input, the air will push the tail plate 84 and enter the suction cup 82 through the air valve 87, so as to cancel the adsorption of the cosmetic box and actively lift the cosmetic box, thus completing the processing.

[0039] Of course, in some other injection molding production processes, there is also an injection molding method of directly injecting a single cosmetic case, which can also be applicable to the printing requirements of such cosmetic cases in this application. The existence of plastic strips during the injection molding of the cosmetic cases described above is only one injection molding method adopted in this application, and does not limit or narrow the application environment of this application.

[0040] The above embodiments are only used to exemplarily illustrate the principles and effects of the present invention, rather than to limit the present invention. Any person familiar with this technology can modify or change the above embodiments without departing from the spirit and scope of the present invention. Therefore, all equivalent modifications or changes completed by those with ordinary knowledge in the technical field without departing from the spirit and technical ideas disclosed by the present invention should still be covered by the claims of the present invention.

Claims

1. A silk screen printing device for a cosmetic box, comprising a machine base, wherein a printing mechanism is provided on the upper side of the machine base, and it is characterized in that: A feeding mechanism is provided on the front side of the machine base; The feeding mechanism includes a first guide rail, a gripper, a turntable, and a material tray. The first guide rail is provided in the middle of the upper end of the machine base, and the sliding direction is in the front-rear direction. The gripper is slidably connected to the first guide rail. The turntable is provided on the front side of the machine base and is positionally corresponding and matching with the gripper. The material tray is provided on the turntable, and the number of the material trays is at least two; The turntable includes a frame, a carrier plate, and a transmission wheel. The frame is fixedly connected to the machine base. The carrier plate is rotatably provided in the frame. The transmission wheel is provided at the lower end of the carrier plate and is concentric with it. The material tray is provided on the carrier plate and is connected and matched with the gripper.

2. The silk-screen printing device for a cosmetic box according to claim 1, characterized in that: The printing mechanism includes a longitudinal guide rail, a transverse guide rail, a fixture, and a squeegee. The longitudinal guide rail is provided at the rear side of the upper end of the machine base. The transverse guide rail is slidably connected up and down with the longitudinal guide rail. There are two fixtures which are respectively fixed at the left and right ends of the transverse guide rail. The squeegee is slidably provided left and right on the transverse guide rail.

3. The silk-screen printing device for a cosmetic box according to claim 2, wherein: A ring groove is formed on the side of the carrier plate. The groove body of the ring groove is composed of a mutually connected first inner groove and a first notch. The first notch is the opening part. The vertical section of the first inner groove of the ring groove is circular, and the opening size of the first notch is the same as the inner groove diameter of the first inner groove.

4. The silk-screen printing device for a cosmetic box according to claim 3, wherein: The turntable is provided with a fitting groove. The material tray is slidably fitted in the fitting groove. And two material trays cooperate with the turntable to make the whole turntable in a disc structure. A connecting groove which is positionally matching with the ring groove is formed on the side of the material tray. The groove body of the connecting groove is composed of a mutually connected second inner groove and a second notch. The second notch is the opening part. The shape structure of the second inner groove is the same as that of the first inner groove, and the opening size of the second notch is smaller than the maximum inner diameter size of the second inner groove.

5. The silk-screen printing device for a cosmetic box according to claim 4, characterized in that: The gripper includes a traction body and a pull ring. The traction body is slidably connected to the first guide rail. The pull ring is connected to the traction body and the vertical section structure is matching with the connecting groove.

6. The silk-screen printing device for a cosmetic box according to claim 5, wherein: An electromagnet is provided on the pull ring, and a traction magnet matching with the electromagnet is provided in the second inner groove.

7. A silk-screen printing device for a cosmetic box according to claim 6, characterized in that: A stabilizing component is further provided between the material tray and the turntable. The stabilizing component includes a plurality of adsorbers. A plurality of the adsorbers are evenly provided in the material tray. An air passage communicating with the fitting groove is formed at the center of the transmission wheel. The material tray is provided with an air distribution groove communicating with the air passage. A plurality of the adsorbers are in air passage communication with the air distribution groove.

8. The silk-screen printing device for a cosmetic box according to claim 7, characterized in that: The adsorber includes a suction cup, a telescopic tube, a tail plate, a lower bracket, a limiting ring, and an air valve. An air cavity communicating with the air passage and the outside is formed in the material tray. The adsorber is provided in the air cavity. The lower bracket and the limiting ring are both fixedly provided in the air cavity, and the limiting ring is located above the lower bracket. The tail plate is slidably sealed in the air cavity and is located between the lower bracket and the limiting ring. The telescopic tube is concentrically connected with the tail plate and slidably seals and extends out of the air cavity. The suction cup is connected to the telescopic tube and is located above the material tray. A passage is formed jointly by the telescopic tube, the suction cup, and the tail plate. The air valve is provided in the passage. The lower bracket is provided with an extension rod extending upward and slidably sealingly connected with the passage. The extension rod is hollow and the hollow part penetrates through the lower bracket.

Images