Automatic feeding device for a screen printing apparatus

Abstract

The utility model discloses a kind of automatic feeding devices of silk-screen equipment, it is related to printing equipment technical field, and the utility model includes silk-screen machine, the upper portion of silk-screen machine is equipped with walking frame, walking frame one side is equipped with ink scraping equipment, the lower portion of walking frame is provided with ink supply equipment, for the ink ration supply to silk screen, ink supply equipment includes: conveying assembly includes the upper cover plate of being set in the lower portion of walking frame, when the present application needs to supply ink, drive cylinder drives entire conveying assembly to descend and make ink supply nozzle close to silk screen, ink metering pump injects ink to ink cavity by hose, after ink cavity is full, control valve opens, execution cylinder drives adsorption plate to descend and cooperates ink extrusion to ink supply nozzle, realizes the ration supply and uniform coating of ink, so that it is through the cooperation of control valve and ink metering pump, ensure that the dose of ink supplied each time is consistent, avoid traditional manual feeding not timely or feeding excessive leading to waste.

Description

Technical Field

[0001] This utility model relates to the field of printing equipment technology, specifically to an automatic feeding device for screen printing equipment. Background Technology

[0002] Screen printing, a widely used printing technology, works by using a squeegee to squeeze ink through the image area of ​​a screen and transfer it onto the substrate.

[0003] Referring to patent document CN218315739U, published on 2023-01-17, a screen printing device is disclosed. This device includes a printing plate mechanism, a squeegee mechanism, and a feeding mechanism. The printing plate mechanism includes a mounting assembly and a screen printing screen, which is mounted on the mounting assembly and connected to a first connecting plate. The first connecting plate is movable along the Z-direction. The squeegee mechanism is connected to the first connecting plate and is movable relative to the printing plate mechanism along the Z and X directions. The feeding mechanism is located on the other side of the printing plate mechanism and includes a carrier and a slide assembly. The carrier carries the workpiece and is mounted on the slide assembly. The slide assembly can move the carrier along the Y-direction to transfer the workpiece to a position opposite the screen printing screen or to allow the carrier to avoid the screen printing screen. By using the slide assembly, the carrier can move back and forth, allowing it to be moved forward to a position not obstructed by the screen printing screen for workpiece loading and unloading, making operation more convenient and improving work efficiency.

[0004] Based on the search of patent numbers and the shortcomings of existing technologies, the following was found: In traditional screen printing equipment, ink addition relies heavily on manual operation. Operators judge the ink level based on experience and manually add ink to the screen using a squeegee or container. However, manual feeding makes it difficult to ensure that the amount of ink added each time is precise and consistent. Insufficient feeding will result in incomplete and light-colored printed patterns, while excessive feeding will easily cause ink overflow and accumulation, leading to blurred patterns and dirty plates, which can affect the clarity and consistency of printed products. Secondly, the intermittent nature of manual operation will interrupt the continuous production process and reduce production efficiency.

[0005] Therefore, this utility model provides an automatic feeding device for screen printing equipment. Utility Model Content

[0006] In order to solve the problem that the traditional screen printing production method, which relies on manual experience to add ink, not only easily leads to quality problems such as defects and blurry prints due to uneven material feeding, but also restricts production efficiency due to the intermittent nature of the operation; the purpose of this utility model is to provide an automatic feeding device for screen printing equipment.

[0007] To achieve the above objectives, this utility model provides the following technical solution: an automatic feeding device for screen printing equipment, comprising a screen printing machine, a traveling frame mounted on the upper part of the screen printing machine, a scraping device mounted on one side of the traveling frame, and an ink supply device provided at the lower part of the traveling frame for quantitatively supplying ink to the screen printing plate, the ink supply device comprising: The conveying assembly includes an upper cover plate located at the bottom of the walking frame, a drive assembly at the top of the upper cover plate, a housing at the bottom of the upper cover plate, an ink supply nozzle fixedly installed at the bottom of the housing, an ink chamber in the middle of the housing, a control valve installed in the middle of the ink supply nozzle, a flexible hose connected to the ink chamber fixedly installed at one end of the housing, an ink metering pump fixedly installed at the middle of one side of the walking frame, and the other end of the flexible hose fixedly installed at the output end of the ink metering pump. An adsorption component, located at the top of the housing, is used to prevent ink dripping.

[0008] Preferably, the adsorption assembly includes two actuator cylinders fixedly installed on the top of the upper cover plate, an adsorption plate is slidably mounted on the upper part of the ink cavity, and the top of the adsorption plate is fixedly installed on the drive end of the actuator cylinder.

[0009] Preferably, the drive assembly includes a drive cylinder whose top center is fixedly mounted on the drive end of the drive cylinder, which is fixedly mounted on the lower side of one side of the walking frame.

[0010] Preferably, the upper cover plate and the housing have multiple mounting holes on opposite sides, and the upper cover plate and the housing are fixedly installed by fastener bolts passing through the mounting holes.

[0011] Preferably, a storage box is fixedly installed on one side of the top of the screen printing machine, and the input end of the ink metering pump is fixedly installed on one side of the lower part of the storage box.

[0012] Preferably, the upper part of the upper cover plate has a plurality of pressure relief holes distributed at equal intervals, and the pressure relief holes are interconnected with the ink cavity.

[0013] Beneficial effects This utility model provides an automatic feeding device for screen printing equipment. Compared with the prior art, it has the following advantages: 1. When ink supply is required, the drive cylinder moves the entire conveying assembly downwards, bringing the ink supply nozzle closer to the screen printing plate. The ink metering pump injects ink into the ink chamber through a hose. Once the ink chamber is full, the control valve opens, and the execution cylinder drives the adsorption plate downwards to squeeze the ink to the ink supply nozzle. This achieves quantitative ink supply and uniform coating. Through the cooperation of the control valve and the ink metering pump, the dosage of ink supplied each time is ensured to be consistent, avoiding waste caused by untimely or excessive feeding in traditional manual methods. At the same time, the ink supply nozzle allows the ink to be spread evenly on the screen printing plate with uniform thickness and width, avoiding the ink accumulation and uneven distribution problems that are easily caused by traditional manual or simple ink supply methods, and significantly improving the clarity and consistency of the printed pattern.

[0014] 2. After ink supply is completed, this application can drive the adsorption plate to move upward with a cylinder to form a negative pressure in the ink chamber to adsorb the residual ink in the ink supply nozzle. During this process, the control valve remains open and closes only after the ink is completely sucked in, so as to actively prevent ink from dripping from the ink supply nozzle when not in operation, thus avoiding product contamination, material waste and a dirty working environment. Attached Figure Description

[0015] Figure 1 This is a schematic diagram of the structure of this utility model.

[0016] Figure 2 This is a schematic cross-sectional view of the walking frame structure of this utility model.

[0017] Figure 3 This utility model Figure 2 Enlarged view of point A in the middle.

[0018] Figure 4 This is a schematic diagram of the conveying component structure of this utility model.

[0019] Figure 5 This is a schematic diagram of the cross-sectional structure of the outer shell of this utility model.

[0020] In the diagram: 1. Screen printing machine; 11. Walking frame; 12. Squeegee; 2. Ink supply equipment; 21. Conveying assembly; 211. Drive cylinder; 212. Top cover; 213. Housing; 2131. Ink chamber; 214. Control valve; 215. Ink nozzle; 216. Ink metering pump; 2161. Hose; 217. Storage tank; 22. Adsorption assembly; 221. Actuating cylinder; 222. Adsorption plate; 223. Pressure relief hole. Detailed Implementation

[0021] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0022] Please see Figure 1-5 This utility model provides a technical solution: an automatic feeding device for screen printing equipment, including a screen printing machine 1. A traveling frame 11 is mounted on the upper part of the screen printing machine 1, and the traveling frame 11 is installed on a guide rail on one side of the upper part of the screen printing machine 1, enabling it to move horizontally to print products. A doctor blade device 12 is mounted on one side of the traveling frame 11. The doctor blades at the bottom of the doctor blade device 12 are controlled to rise and fall by two cylinders, cooperating to perform printing operations on the products. An ink supply device 2 is provided at the lower part of the traveling frame 11 for quantitatively supplying ink to the screen printing plate. The ink supply device 2 includes: The conveying assembly 21 includes an upper cover plate 212 disposed at the lower part of the traveling frame 11. A drive assembly is located at the top of the upper cover plate 212, and a housing 213 is disposed at the lower part of the upper cover plate 212. The housing 213 is integrally formed from 304 stainless steel. An ink supply nozzle 215 is fixedly installed at the bottom of the housing 213. The ink supply nozzle 215 is flat and rectangular to ensure that ink is evenly sprayed onto the screen printing plate. An ink chamber 2131 is opened in the middle of the housing 213, and a control valve 214 is installed in the middle of the ink supply nozzle 215. The control valve 214 is an electromagnetic directional valve. In the initial state, when there is no ink in the ink chamber 2131... The control valve 214 is closed. After the ink in the ink chamber 2131 is fully injected and occupied, the control valve 214 is opened to discharge the material, ensuring that the ink supply nozzle 215 discharges the material evenly. At the same time, the control valve 214 and the actuation cylinder 221 of the adsorption component 22 are controlled by the control system to cooperate with each other when the material supply is stopped. A flexible hose 2161 connected to the ink chamber 2131 is fixedly installed at one end of the housing 213. An ink metering pump 216 is fixedly installed in the middle of one side of the walking frame 11. The ink metering pump 216 is a gear metering pump. The other end of the flexible hose 2161 is fixedly installed at the output end of the ink metering pump 216. The adsorption component 22 is disposed on the upper part of the housing 213 to prevent ink dripping.

[0023] The adsorption assembly 22 includes two actuator cylinders 221 fixedly installed on the top of the upper cover plate 212. An adsorption plate 222 is slidably mounted on the upper part of the ink chamber 2131. The top of the adsorption plate 222 is fixedly installed on the drive end of the actuator cylinder 221. When the actuator cylinder 221 drives the adsorption plate 222 to move downward and reset, it can cooperate with the ink metering pump 216 to squeeze the ink in the ink chamber 2131 to the ink supply nozzle 215. When moving upward, a negative pressure is formed to adsorb residual ink and prevent dripping. At the same time, the control valve 214 is not closed during the upward process. It is closed after the actuator cylinder 221 drives the adsorption plate 222 to move upward and completely suck the ink into the ink chamber 2131.

[0024] The drive assembly includes a drive cylinder 211 fixedly installed on the lower side of one side of the walking frame 11. The top center of the cover plate 212 is fixedly installed on the drive end of the drive cylinder 211. The drive cylinder 211 can drive the entire conveying assembly 21 to rise and fall in the vertical direction. When ink needs to be applied, it moves down to bring its ink supply nozzle 215 closer to the screen printing plate, thereby avoiding ink splashing during ink supply. After ink application is completed, it drives the whole assembly to move up to prevent the doctor blade from sticking to the outside of the ink supply nozzle 215 when it reciprocates to scrape the ink.

[0025] Multiple mounting holes are provided on the opposite sides of the upper cover plate 212 and the housing 213. The upper cover plate 212 and the housing 213 are fixedly installed by fastener bolts passing through the mounting holes. The upper cover plate 212 and the housing 213 are detachably and sealed by bolts, so that they can be inspected in a timely manner and the condition inside the ink cavity 2131 can be checked.

[0026] A storage tank 217 is fixedly installed on one side of the top of the screen printing machine 1. The storage tank 217 is made of transparent PC material and has a volume of 8L. The outside of the tank is equipped with liquid level scale lines (accuracy 10mL). The bottom is equipped with a flow guide structure with an inclination angle of 15° to ensure that the ink is completely discharged. The input end of the ink metering pump 216 is fixedly installed on the lower side of the storage tank 217.

[0027] The upper part of the upper cover plate 212 is provided with multiple pressure relief holes 223 distributed at equal intervals. The pressure relief holes 223 are connected to the ink cavity 2131. The diameter of the pressure relief holes 223 is 3mm. They are used to balance the air pressure in the ink cavity 2131 located on the upper part of the adsorption plate 222 and ensure the stable up and down movement of the adsorption plate 222.

[0028] Furthermore, any content not described in detail in this specification is existing technology known to those skilled in the art.

[0029] During operation, when the ink on the screen printing plate is detected as depleted (the detection can be set via the control system, determined by the number of uses or time after each feeding), the control system is activated. The drive cylinder 211 moves the entire conveying assembly 21 downwards, bringing the ink nozzle 215 closer to the screen printing plate to prevent ink splashing. The ink metering pump 216 injects ink into the ink chamber 2131 through the hose 2161. (During the initial injection, the control valve 214 opens only after the ink chamber 2131 is full). For subsequent injections, the control valve 214 opens synchronously with the ink metering pump 216, simultaneously driving the cylinder 221 to suction... When the auxiliary plate 222 moves downward (resets), the ink metering pump 216 evenly squeezes the ink into the ink supply nozzle 215. The ink supply nozzle 215 evenly coats the ink onto the screen with a flat rectangular outlet. After the ink supply is completed, the actuating cylinder 221 drives the adsorption plate 222 upward, forming a negative pressure in the ink chamber 2131 to adsorb the residual ink in the ink supply nozzle 215 and prevent dripping. During the upward movement of the adsorption plate 222, the control valve 214 remains open and closes after the ink is completely sucked into the ink chamber 2131 to ensure no residue. At the same time, the driving cylinder 211 moves the conveying assembly 21 upward, thus completing one feeding cycle.

[0030] It should be noted that, in this document, relational terms such as "first" and "second" are used only to distinguish one entity or operation from another, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Furthermore, the terms "comprising," "including," or any other variations thereof are intended to cover non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements includes not only those elements but also other elements not expressly listed, or elements inherent to such process, method, article, or apparatus.

[0031] Although embodiments of the present invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the present invention, the scope of which is defined by the appended claims and their equivalents.

Claims

1. An automatic feeding device for screen printing equipment, comprising a screen printing machine (1), characterized in that: The screen printing machine (1) is equipped with a traveling frame (11) on its upper part, and a scraping device (12) is installed on one side of the traveling frame (11). An ink supply device (2) is provided at the lower part of the traveling frame (11) for quantitatively supplying ink to the screen printing plate. The ink supply device (2) includes: The conveying assembly (21) includes an upper cover plate (212) located at the bottom of the walking frame (11). The top of the upper cover plate (212) is provided with a drive assembly. The lower part of the upper cover plate (212) is provided with a housing (213). An ink supply nozzle (215) is fixedly installed at the bottom of the housing (213). An ink chamber (2131) is opened in the middle of the housing (213). A control valve (214) is installed in the middle of the ink supply nozzle (215). A hose (2161) communicating with the ink chamber (2131) is fixedly installed at one end of the housing (213). An ink metering pump (216) is fixedly installed in the middle of one side of the walking frame (11). The other end of the hose (2161) is fixedly installed at the output end of the ink metering pump (216). An adsorption component (22) is provided on the upper part of the housing (213) to prevent ink dripping.

2. The automatic feeding device for screen printing equipment according to claim 1, characterized in that: The adsorption assembly (22) includes two actuator cylinders (221) fixedly installed on the top of the upper cover plate (212). An adsorption plate (222) is slidably mounted on the upper part of the ink cavity (2131). The top of the adsorption plate (222) is fixedly installed on the drive end of the actuator cylinder (221).

3. The automatic feeding device for screen printing equipment according to claim 1, characterized in that: The drive assembly includes a drive cylinder (211) fixedly installed on the lower side of one side of the walking frame (11), and the top center of the cover plate (212) is fixedly installed on the drive end of the drive cylinder (211).

4. The automatic feeding device for screen printing equipment according to claim 1, characterized in that: The upper cover plate (212) and the housing (213) are provided with multiple mounting holes on opposite sides. The upper cover plate (212) and the housing (213) are fixedly installed by fastener bolts passing through the mounting holes.

5. The automatic feeding device for screen printing equipment according to claim 1, characterized in that: A storage box (217) is fixedly installed on one side of the top of the screen printing machine (1), and the input end of the ink metering pump (216) is fixedly installed on the lower side of the storage box (217).

6. The automatic feeding device for screen printing equipment according to claim 1, characterized in that: The upper part of the cover plate (212) is provided with a plurality of equally spaced pressure relief holes (223), and the pressure relief holes (223) are connected to the ink cavity (2131).

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