Screen printing equipment

Abstract

The invention provides silk-screen printing equipment. The silk-screen printing equipment comprises a feeding channel used for conveying plastic parts to be subjected to silk-screen printing and a PP water smearing mechanism. The PP water smearing mechanism comprises a PP water storage container and a smearing device, PP water is stored in the PP water storage container, the PP water in the PP water storage container can be guided to the smearing device, and the smearing device is suspended on the plastic part of the feeding channel, can be controlled to evenly apply the PP water and covers the surface of the plastic part. According to the technical scheme, a novel PP water smearing technology is provided for the silk-screen printing industry, automation of the technological process can be achieved, the production efficiency can be improved, the problem that PP plastic silk-screen printing is difficult is solved, the printing quality is improved, meanwhile, the problem that in the traditional production process, personnel make close contact with PP water is avoided, and harm of toxic substances to the human body is reduced.

Description

Technical Field

[0001] The present invention relates to the technical field of screen printing, in particular to a screen printing device. Background Art

[0002] In the field of printing and processing of plastic products, PP plastic (polypropylene) has been widely used due to its excellent comprehensive properties, such as light weight, high strength, and chemical resistance. However, because PP plastic is a non-polar polymer material, its surface energy is low, making it difficult for ink to form a strong adhesion to its surface, greatly affecting the quality and effect of printing. PP water (i.e., PP treatment agent, PP adhesion promoter, which can solve the problem of poor adhesion of coatings and inks on untreated PP or PP / EPDM plastic substrates, and its main components are chlorinated polypropylene resin or chlorinated modified acrylic resin), is a treatment agent specifically used to enhance the surface activity of PP plastic. Its main component, chlorinated polypropylene polymer, plays a key role. It can effectively increase the wettability of the PP plastic surface and change the physical and chemical properties of the surface, thereby significantly improving the adhesion of ink to the plastic surface, laying the foundation for high-quality printing.

[0003] Among numerous printing processes, screen printing is widely used in the printing of PP plastic products due to its unique advantages, such as its ability to print on substrates of various shapes and materials, producing thick, vibrant ink layers, and producing vibrant colors. However, the application of PP water in screen printing equipment still presents significant shortcomings. Current screen printing equipment generally lacks automated PP water application equipment, resulting in a reliance on manual application of PP water during the pre-printing process. Manual application is not only inefficient and unable to meet the demands of large-scale industrial production, but also difficult to ensure uniform and consistent application. Differences in operator technique, pressure, and proficiency can lead to uneven distribution of PP water on the PP plastic surface, resulting in inconsistent ink adhesion during the subsequent printing process, resulting in inconsistent print quality and a high rate of defective products. Furthermore, manual operation increases labor and management costs for companies. Furthermore, manual application and close contact with PP water pose a risk of inhalation of toxic substances.

[0004] Under this background, the present invention proposes a new technical solution. Summary of the Invention

[0005] The present invention aims to solve at least one of the technical problems existing in the prior art. To this end, the present invention proposes a screen printing device, which adopts the following technical solutions:

[0006] A screen printing device comprising

[0007] Loading channel, used to transport plastic parts to be screen printed;

[0008] The PP water coating mechanism includes a PP water storage container and a coating device. The PP water storage container stores PP water and can guide the PP water therein to the coating device. The coating device is suspended on the plastic part of the feeding channel and can controllably and evenly apply PP water and cover the surface of the plastic part.

[0009] According to a screen printing device according to an embodiment of the present invention, the PP water smearing mechanism includes a smearing action execution mechanism, which can drive the smearing device to move in the X-axis direction and the Y-axis direction to evenly apply PP water to cover the surface of the plastic part or away from the plastic part, and the X-axis direction is consistent with the conveying direction of the plastic part in the feeding channel.

[0010] According to a screen printing device of an embodiment of the present invention, the smearing action execution mechanism includes a vertical bracket and a horizontal axis bracket laterally connected to the vertical bracket, the horizontal axis bracket can be raised and lowered on the vertical bracket, and a smearing bracket is provided on the horizontal axis bracket, and the smearing bracket can move left and right on the horizontal axis bracket; the smearing device is arranged on the smearing bracket.

[0011] According to a screen printing device of an embodiment of the present invention, the coating device is a coating scraper and a coating cloth clamped on the coating scraper.

[0012] According to a screen printing device according to an embodiment of the present invention, the PP water storage container guides the PP water to the coating scraper through a delivery pipeline; a coating cloth is clamped on the coating scraper; one end of the delivery pipeline guiding the coating scraper is fixed to the coating scraper, and the PP water seeps onto the coating cloth of the coating scraper.

[0013] According to a screen printing device of an embodiment of the present invention, a regulating valve is provided on the delivery pipeline, and the regulating valve is used to adjust the flow rate of PP water delivered by the delivery pipeline.

[0014] According to an embodiment of the present invention, a screen printing device includes a PP water wiping mechanism, which includes a wiping scraper and a wiping cloth clamped on the wiping scraper; the wiping scraper can be driven to move in the Y-axis direction so that the wiping cloth is attached to the surface of the plastic part to wipe off the PP water on the surface of the plastic part, or away from the plastic part.

[0015] According to a screen printing device according to an embodiment of the present invention, the PP water wiping mechanism includes a horizontal positioning bracket and a vertical screw bracket hung on the horizontal positioning bracket, a wiping bracket and a screw adjustment motor are provided on the vertical screw bracket, and the screw threads of the wiping bracket and the vertical screw bracket cooperate to perform the lifting action; a cylinder lifting structure and a wiping scraper are provided on the wiping bracket, and the wiping scraper can be pressed down to the surface of the plastic part or away from the plastic part under the drive of the cylinder lifting structure.

[0016] According to a screen printing device of an embodiment of the present invention, a box plate is provided on the side of the feeding channel, the vertical bracket is fixed on the box plate, and the horizontal positioning bracket is fixed on the box plate.

[0017] According to a screen printing device of an embodiment of the present invention, a limiting device is provided on the side of the feeding channel, and the limiting device includes a limiting frame and a limiting push rod. The limiting push rod pushes the limiting frame from the side to press on the plastic part to be screen-printed to limit its movement, or drives the limiting frame away from the plastic part.

[0018] Compared with the prior art, the present invention has the following beneficial effects:

[0019] The technical solution of the present invention provides a new PP water coating technology for the screen printing industry, which can realize the automation of the process flow, improve production efficiency, solve the problem of difficult screen printing of PP plastics, improve printing quality, and at the same time avoid the problem of close contact between personnel and PP water in traditional production processes, thereby reducing the harm of toxic substances to the human body. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] The above and / or additional aspects and advantages of the present invention will become apparent and readily understood from the following description of the embodiments with reference to the accompanying drawings, in which:

[0021] Figure 1 are three-dimensional schematic diagrams of some embodiments of the present invention;

[0022] Figure 2 for Figure 1 Enlarged view of part A in the middle;

[0023] Figure 3 for Figure 2 Enlarged view of middle part B;

[0024] Figure 4 Schematic diagram of a PP water coating mechanism in some embodiments of the present invention;

[0025] Figure 5 Schematic diagram of the structure of the PP water coating mechanism in some embodiments of the present invention;

[0026] Figure 6 Schematic diagram of a PP water drying mechanism in some embodiments of the present invention;

[0027] Figure 7 Schematic diagram of the structure of the PP water drying mechanism in some embodiments of the present invention.

[0028] Description of main component symbols:

[0029] 10. PP water smearing mechanism; 20. PP water storage container; 30. Vertical bracket; 40. Horizontal axis bracket; 50. Smearing bracket; 60. Smearing scraper; 70. Delivery pipeline; 71. Control valve; 80. Gravity sensor; 90. PP water wiping mechanism; 100. Wiping scraper; 110. Horizontal positioning bracket; 120. Vertical screw bracket; 130. Screw adjustment motor; 140. Wiping bracket; 150. Cylinder lifting structure; 160. Box board; 170. Limiting frame. DETAILED DESCRIPTION

[0030] Embodiments of the present invention are described in detail below, examples of which are shown in the accompanying drawings, wherein the same or similar reference numerals throughout represent the same or similar elements or elements with the same or similar functions.

[0031] The orientation shown in the drawings cannot be understood as limiting the specific protection scope of the present invention. It is only for reference and understanding of the preferred embodiments. The product components shown in the drawings may be changed in position, increased in number, or simplified in structure.

[0032] The “connection” described in the specification and the mutual “connection” relationship of the components shown in the drawings may be understood as a fixed connection, a detachable connection, or an integral connection; it may be a direct connection or a connection through an intermediate medium. Those skilled in the art may understand the connection relationship according to the specific circumstances and may derive different implementation methods in an appropriate manner by means of screwing, riveting, welding, snapping, or splicing.

[0033] For the directional words such as up, down, left, right, top, and bottom described in the specification and the directions shown in the drawings, the components may be in direct contact or in contact through other features between them; for example, "above" can mean directly above or obliquely above, or it simply means higher than other objects; other directions can also be understood by analogy.

[0034] The materials for making parts with solid shapes shown in the specification and drawings may be metal materials, non-metal materials or other synthetic materials; the mechanical processing techniques used for parts with solid shapes may be stamping, forging, wire cutting, laser cutting, casting, injection molding, CNC milling, 3D printing, machining, etc.; ordinary technicians in this field can adaptively select or combine them according to different processing conditions, costs, and precision, but are not limited to the above-mentioned materials and manufacturing processes.

[0035] The present invention provides a screen printing device, such as Figure 1 、 2 , 4, 5, including

[0036] Loading channel, used to transport plastic parts to be screen printed;

[0037] The PP water coating mechanism 10 includes a PP water storage container 20 and a coating device. The PP water storage container 20 stores PP water and can guide the PP water therein to the coating device. The coating device is suspended on the plastic part of the feeding channel and can controllably and evenly apply PP water and cover the surface of the plastic part.

[0038] In the embodiment, the screen printing equipment is a fully automatic turntable screen printing machine, the feeding channel is a feeding turntable, the PP water coating mechanism 10 is installed on the fully automatic turntable screen printing machine, and the PP water storage container 20 stores a PP water guide coating device. When the PP plastic bottle on the turntable rotates to the bottom of the PP water coating mechanism 10, the coating device evenly applies PP water and covers the surface of the plastic part. At the same time, the turntable drives the PP plastic bottle to rotate, so that the PP water is evenly circumferentially coated on the PP plastic bottle. After the processing is completed, the PP plastic bottle is transported to the subsequent screen printing station along with the turntable for screen printing.

[0039] The technical solution of the present invention provides a new PP water coating technology for the screen printing industry, which can realize the automation of the process flow, improve production efficiency, solve the problem of difficult screen printing of PP plastics, improve printing quality, and at the same time avoid the problem of close contact between personnel and PP water in traditional production processes, thereby reducing the harm of toxic substances to the human body.

[0040] In some embodiments of the present invention, Figure 4 、 5 As shown, the PP water application mechanism 10 includes an application actuator that drives the application device in the X-axis and Y-axis directions to evenly apply PP water to the surface of the plastic part or away from the plastic part. The X-axis direction is consistent with the conveying direction of the plastic parts in the loading channel. The application device performs the application of PP water under the drive of the application actuator.

[0041] Specifically, in the embodiment, Figure 4 、 5As shown, the coating mechanism comprises a vertical support 30 and a horizontal support 40 connected transversely to the vertical support 30. The horizontal support 40 can move up and down on the vertical support 30. A coating support 50 is mounted on the horizontal support 40 and can move left and right on the horizontal support 40. The coating device is mounted on the coating support 50 and comprises a coating blade 60 and a coating cloth clamped to the coating blade 60. The PP water storage container 20 is fixed to the vertical support 30 and directs the PP water to the coating blade 60 via a delivery pipe 70. One end of the delivery pipe 70, which directs the PP water to the coating blade 60, is fixed to the coating blade 60, allowing the PP water to seep onto the coating cloth of the coating blade 60. A regulating valve 71 is mounted on the delivery pipe 70 to adjust the flow rate of the PP water delivered by the delivery pipe 70. A gravity sensor 80 is also mounted on the vertical support 30 to sense the gravity of the PP water storage container 20.

[0042] In an embodiment of the present invention, the PP water storage container 20 is bottled PP water, placed inverted on a funnel-shaped mounting. Due to gravity, the PP water automatically flows through a delivery pipe 70 to a smearing blade 60. The end of the smearing blade 60 holds a rag, and as the PP water flows, it wets the entire rag, thereby evenly coating the PP plastic under the drive of the smearing actuator. This structure is equipped with a gravity sensor 80 that detects the weight of the PP water and automatically alarms when the PP water is insufficient. The PP water delivery pipe 70 is equipped with a regulating valve 71 that controls the flow rate of the PP water to achieve optimal downstream wetting effect. This structure uses a servo motor module to control the downward pressure process, enabling precise control of the smearing position and pressure. The smearing blade 60 also features adjustable blade angle and fore-and-aft position, adapting to different product requirements.

[0043] In order to prevent excessive PP water on the surface during screen printing, resulting in poor surface printing, after applying PP water on the surface of the PP plastic part, a dry process is required to wipe off excess PP water. In the embodiment, Figure 1 、 2As shown in Figures 6 and 7, a PP water drying mechanism 90 is included, which includes a drying scraper 100 and a drying cloth clamped on the drying scraper 100; the drying scraper 100 can be driven to move in the Y-axis direction so that the drying cloth sticks to the surface of the plastic part to wipe off the PP water on the surface of the plastic part, or moves away from the plastic part. Specifically, the PP water drying mechanism 90 includes a horizontal positioning bracket 110 and a vertical screw bracket 120 mounted on the horizontal positioning bracket 110. A drying bracket 140 and a screw adjustment motor 130 are provided on the vertical screw bracket 120. The drying bracket 140 and the vertical screw bracket 120 screw threads cooperate to perform lifting and lowering movements; a cylinder lifting structure 150 and the drying scraper 100 are provided on the drying bracket 140. The drying scraper 100 can be pressed down to the surface of the plastic part or away from the plastic part under the drive of the cylinder lifting structure 150.

[0044] In the present invention, the action execution of the PP water wiping mechanism 90 is mainly composed of a screw adjustment structure and a cylinder lifting structure 150. The screw adjustment structure is composed of a threaded matching structure between a screw adjustment motor 130, a wiping bracket 140 and a vertical screw bracket 120. Under the action of the screw adjustment motor 130, the wiping bracket 140 moves up and down on the vertical screw bracket 120 to adjust the wiping height to adapt to different products. When the PP plastic bottle on the turntable is placed under the PP water applying mechanism 10, the wiping scraper 100 is pressed on the PP plastic bottle with the wiping cloth. At the same time, the turntable drives the PP plastic bottle to rotate, so that the excess PP water on the PP plastic bottle is wiped off. Afterwards, the PP plastic bottle is transported to the subsequent silk screen printing station for silk screen printing. In the embodiment, the cylinder lifting structure 150 cooperates with the action process to achieve the avoidance action. After a PP plastic bottle is wiped dry, the cylinder lifting structure 150 controls the wiping scraper 100 to lift up. When the next PP plastic bottle is placed under the PP water applying mechanism 10, the cylinder lifting structure 150 controls the wiping scraper 100 to press down so that the wiping cloth is pressed on the PP plastic bottle.

[0045] In some embodiments of the present invention, Figure 1 、 2 As shown, a box plate 160 is provided on the side of the feeding channel, the vertical bracket 30 of the PP water applying mechanism 10 is fixed on the box plate 160 , and the horizontal positioning bracket 110 of the PP water wiping mechanism 90 is fixed on the box plate 160 .

[0046] In some embodiments of the present invention, Figure 1 、 2As shown, a limiting device is installed on the side of the loading channel. The limiting device includes a limiting frame 170 and a limiting push rod. The limiting push rod pushes the limiting frame from the side to press against the plastic part to be screen-printed to limit its movement, or drives the limiting frame 170 away from the plastic part. Before the turntable rotates to load the PP plastic bottles, it first rotates through the PP water application mechanism 10 and the PP water drying mechanism 90, stopping to allow the PP water to be applied and excess PP water to be wiped away. When stopped, the limiting push rod pushes the limiting frame 170 to act on the turntable to limit the position, preventing the PP plastic bottles from shifting during the application and drying operations, which would affect the application and drying results.

[0047] Although the present invention has been described in detail with reference to the above embodiments, it will be apparent to those skilled in the art from this disclosure that various changes or modifications may be made to the present invention without departing from the principles and spirit of the invention as defined in the claims. Therefore, the detailed description of the disclosed embodiments is intended to be illustrative only and not to limit the present invention, which is to be defined by the claims.

Claims

1. A screen printing device, characterized in that: Including Loading channel, used to transport plastic parts to be screen printed; A PP water coating mechanism (10) comprises a PP water storage container (20) and a coating device, wherein the PP water storage container (20) stores PP water and can guide the PP water therein to the coating device, and the coating device is suspended on a plastic part of a feeding channel and can controllably and evenly apply the PP water and cover the surface of the plastic part.

2. The screen printing device according to claim 1, characterized in that: The PP water coating mechanism (10) includes a coating action execution mechanism, which can drive the coating device to move in the X-axis direction and the Y-axis direction to evenly apply PP water to cover the surface of the plastic part or away from the plastic part, and the X-axis direction is consistent with the conveying direction of the plastic part in the feeding channel.

3. The screen printing device according to claim 2, characterized in that: The smearing action execution mechanism includes a vertical bracket (30) and a horizontal axis bracket (40) laterally connected to the vertical bracket (30), the horizontal axis bracket (40) can move up and down on the vertical bracket (30), and a smearing bracket (50) is provided on the horizontal axis bracket (40), and the smearing bracket (50) can move left and right on the horizontal axis bracket (40); the smearing device is arranged on the smearing bracket (50).

4. The screen printing device according to claim 1, characterized in that: The coating device comprises a coating scraper (60) and a coating cloth clamped on the coating scraper (60).

5. The screen printing device according to claim 4, characterized in that: The PP water storage container (20) guides the PP water to the smear scraper (60) through a delivery pipe (70); one end of the delivery pipe (70) guiding the smear scraper (60) is fixed to the smear scraper (60), and the PP water seeps onto the smear cloth of the smear scraper (60).

6. The screen printing device according to claim 5, characterized in that: A regulating valve (71) is provided on the delivery pipeline (70), and the regulating valve (71) is used to regulate the flow rate of PP water delivered by the delivery pipeline (70).

7. The screen printing device according to claim 3, characterized in that: The invention comprises a PP water wiping mechanism (90), which comprises a wiping scraper (100) and a wiping cloth clamped on the wiping scraper (100); the wiping scraper (100) can be driven to move in the Y-axis direction so that the wiping cloth sticks to the surface of the plastic part to wipe off the PP water on the surface of the plastic part, or moves away from the plastic part.

8. The screen printing device according to claim 7, characterized in that: The PP water wiping mechanism (90) comprises a transverse positioning bracket (110) and a vertical screw bracket (120) mounted on the transverse positioning bracket (110); a wiping bracket (140) and a screw adjusting motor (130) are provided on the vertical screw bracket (120); the screw threads of the wiping bracket (140) and the vertical screw bracket (120) cooperate to perform a lifting action; a cylinder lifting structure (150) and a wiping scraper (100) are provided on the wiping bracket (140); the wiping scraper (100) can be pressed downward to the surface of the plastic part or away from the plastic part under the drive of the cylinder lifting structure (150).

9. The screen printing device according to claim 7, characterized in that: A box plate is provided on the side of the feeding channel, the vertical bracket (30) is fixed on the box plate, and the transverse positioning bracket (110) is fixed on the box plate.

10. The screen printing device according to claim 1, characterized in that: A limiting device is provided on the side of the feeding channel, and the limiting device includes a limiting frame (170) and a limiting push rod. The limiting push rod pushes the limiting frame (170) from the side to press on the plastic part to be screen-printed to limit its movement, or drives the limiting frame (170) away from the plastic part.

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