Anti-overflow scraper for solder paste printing machine

Abstract

The utility model provides an anti-overflow scraper for a solder paste printing machine, which comprises a scraper frame body, a double-end motor is mounted in the scraper frame body, driving gears are rotatably connected to the left end and the right end of the upper portion of the scraper frame body, two ends of the double-end motor are respectively connected with the two driving gears, and driven gears are rotatably connected to the left end and the right end of the lower portion of the scraper frame body. Lifting plates are connected to the front side and the rear side of the tool rest body in a sliding mode and connected with the outer sides of the two gear belts, a scraper strip is arranged on the lower edge of each lifting plate, the left side and the right side of each scraper strip are spill-proof flanges expanding outwards, and a spill-proof storage groove is formed in the lower edge of each scraper strip. The end, corresponding to the anti-overflow blocking edge, of the anti-overflow material storage groove is sealed, and a blocking strip inclining outwards and downwards is arranged at the position, corresponding to the anti-overflow blocking edge, in the anti-overflow material storage groove. According to the utility model, redundant solder paste can be managed more effectively, and the solder paste can be prevented from overflowing even if the solder paste is too much.

Description

Technical Field

[0001] This utility model belongs to the field of solder paste printing technology and relates to an anti-overflow scraper for solder paste printing machines. Background Technology

[0002] In the electronics manufacturing industry, solder paste printing is a crucial step in the soldering process of accurately distributing solder paste to designated locations on printed circuit boards (PCBs) to enable the soldering of electronic components. Solder paste printers play a vital role in this process, and the squeegee, as one of the core components of a solder paste printer, is responsible for evenly applying solder paste to the PCB.

[0003] Traditional solder paste printers typically use squeegees with straight edges. During operation, as the squeegee moves along the stencil and applies pressure, solder paste is forced through openings in the stencil and deposited onto the corresponding pads on the PCB. However, this design has a significant drawback: if the solder paste supply exceeds the required amount during squeegee movement, the excess solder paste will overflow from the edges of the squeegee. This leads to wasted solder paste, increasing production costs; furthermore, the overflowing solder paste easily solidifies around the machine, making it difficult to clean and potentially causing equipment malfunctions or environmental pollution, ultimately affecting printing quality and efficiency.

[0004] To address these issues, some existing squeegee designs incorporate outward-expanding edge structures to help contain and collect excess solder paste, preventing it from overflowing outside the printing area. However, these existing anti-overflow measures are still insufficient when the solder paste supply is particularly high or the squeegee operates at a fast speed; some solder paste still overflows from both sides of the squeegee, causing unnecessary trouble and losses. Utility Model Content

[0005] The purpose of this invention is to provide an anti-overflow squeegee for solder paste printing machines, which can more effectively manage excess solder paste and ensure that solder paste overflow is avoided even when there is too much solder paste.

[0006] To solve the above technical problems, this utility model provides an anti-overflow squeegee for a solder paste printing machine, including a squeegee holder body. A dual-head motor is installed inside the squeegee holder body. Drive gears are rotatably connected to both ends of the upper part of the squeegee holder body. The power output shafts at both ends of the dual-head motor are respectively connected to the two drive gears. Driven gears that mesh with the corresponding drive gears are rotatably connected to both ends of the lower part of the squeegee holder body. A gear belt connects the drive gear and the driven gear located at the same end of the squeegee holder body. Both the front and rear sides are slidably connected to lifting plates that can slide up and down. Each lifting plate is connected to the outer side of two gear belts. Each lifting plate has a scraper strip on its lower side. Each scraper strip has outward-expanding anti-overflow baffles on both the left and right sides, making the two scraper strips approximately form two inward-facing brackets. Each scraper strip has an anti-overflow storage trough with its opening facing inward on its lower side. Each anti-overflow storage trough is sealed at the end of the corresponding anti-overflow baffle. Each anti-overflow storage trough has a baffle strip at the position of the corresponding anti-overflow baffle, and the outward end of each baffle strip is inclined downward.

[0007] By adopting the above technical solution, during solder paste printing, when the paste applicator extrudes the solder paste into strips onto the isolation screen, the printer drives the squeegee to move back and forth to spread the solder paste evenly. During this process, the dual-head motor drives the drive gear to rotate, which in turn drives the gear belt to move, causing one end of the lifting plate to move down and the other end to move up. The downward-moving squeegee strip contacts the isolation screen and carries the solder paste in one direction. During this process, the solder paste enters the anti-overflow storage tank, making it difficult for the solder paste to overflow from both ends and ensuring that the solder paste is evenly distributed in the anti-overflow storage tank, making the solder paste printing more uniform. At the same time, it is blocked inward by the anti-overflow baffle and, under the secondary blocking of the baffle strip, provides multi-level protection, effectively preventing the solder paste from overflowing from both ends.

[0008] The present invention is further configured such that a T-shaped slide bar is vertically arranged in the middle of each lifting plate, and T-shaped slide rails that are slidably connected to the corresponding slide bar are arranged on the front and rear sides of the main body of the tool holder.

[0009] The present invention is further configured such that connecting strips are horizontally arranged on the outer sides of both the front and rear sides of each gear belt, and multiple connecting slots are arranged on both sides of the corresponding slide bar and distributed along its height direction and connected to the corresponding connecting strips.

[0010] The present invention is further provided in that both the left and right ends of the lifting plate are provided with connecting plates that are rotatably connected to the corresponding driven gears.

[0011] The present invention is further configured such that the cross-section of each anti-overflow storage tank is arc-shaped.

[0012] The present invention is further configured such that gaps are left between the upper and lower ends of each baffle and the inner wall of the corresponding anti-overflow storage tank.

[0013] Compared with the prior art, the present invention has the following beneficial effects:

[0014] Firstly, this utility model utilizes an anti-overflow storage tank to temporarily store solder paste. The outward and downward inclined baffles prevent the solder paste from moving to both ends, and the anti-overflow baffles gather the solder paste inward, providing multi-level protection and more effectively preventing solder paste from overflowing.

[0015] Secondly, when the anti-overflow storage tank of this utility model moves the solder paste, it can make the solder paste evenly distributed in the anti-overflow storage tank, making the solder paste printing more uniform. Moreover, when there is too much solder paste at both ends, under the blocking effect at the ends, the solder paste can flow back to the middle of the anti-overflow storage tank along the upper part of the baffle, making the solder paste printing uniform, thereby improving the quality and efficiency of solder paste printing. Attached Figure Description

[0016] Figure 1 This is a schematic diagram of the overall structure of this utility model;

[0017] Figure 2 Used to showcase the dual-head motor inside the tool holder body;

[0018] Figure 3 Used to display the overflow storage trough and baffle strip below the scraper blade.

[0019] The components include: 1. Tool holder body; 2. Dual-head motor; 3. Drive gear; 4. Connecting plate; 5. Driven gear; 6. Gear belt; 7. Lifting plate; 8. Slide bar; 9. T-shaped slide rail; 10. Connecting clip; 11. Connecting slot; 12. Scraper bar; 13. Anti-overflow side guard; 14. Anti-overflow storage trough; and 15. Stop bar. Detailed Implementation

[0020] The following detailed description, in conjunction with the accompanying drawings and specific embodiments, provides a further detailed explanation of the anti-overflow squeegee for a solder paste printing machine according to this utility model. The advantages and features of this utility model will become clearer from the following description. It should be noted that the drawings are all in a very simplified form and use non-precise proportions, used only to facilitate and clarify the illustration of the embodiments of this utility model. The same or similar reference numerals in the drawings represent the same or similar parts.

[0021] Example, refer to Figure 1-3An anti-overflow scraper for a solder paste printing machine includes a scraper body 1, a double-headed motor 2 installed inside the scraper body 1, a drive gear 3 rotatably connected to both the left and right ends of the upper part of the scraper body 1, the power output shafts at both ends of the double-headed motor 2 being connected to the two drive gears 3 respectively, a connecting plate 4 being provided downward at both the left and right ends of the lifting plate 7, each connecting plate 4 being rotatably connected to a driven gear 5 that cooperates with the corresponding drive gear 3, and a gear belt 6 connecting the drive gear 3 and the driven gear 5 at the same end of the scraper body 1.

[0022] The front and rear sides of the tool holder body 1 are slidably connected to a lifting plate 7 that can slide up and down. Each lifting plate 7 has a vertically arranged T-shaped slide bar 8 in the middle. The front and rear sides of the tool holder body 1 are each provided with a T-shaped slide rail 9 that is slidably connected to the corresponding slide bar 8. Multiple connecting strips 10 are horizontally arranged on the outer sides of the front and rear sides of each gear belt 6. Each lifting plate 7 has multiple connecting slots 11 on both sides of the corresponding slide bar 8 that are distributed along its height direction and connected to the corresponding connecting strips 10, so that the lifting plate 7 is connected to the outer sides of the two gear belts 6.

[0023] Each lifting plate 7 has a scraper strip 12 at its lower edge. Each scraper strip 12 has an outwardly expanding anti-overflow guard 13 on both its left and right sides, making the two scraper strips 12 approximately form two inwardly facing brackets. Each scraper strip 12 has an inwardly opening anti-overflow storage tank 14 at its lower edge. The cross-section of each anti-overflow storage tank 14 is arc-shaped, allowing solder paste to be temporarily stored within it, making it less likely to overflow during scraping. Each anti-overflow storage tank 14 is sealed at the end of its corresponding anti-overflow guard 13 to prevent solder paste from spilling out of the anti-overflow storage tank. The solder paste overflows from both ends of the slurry 14. Each anti-overflow slurry 14 has a baffle 15 at the corresponding anti-overflow baffle 13 position. The outward end of each baffle 15 is inclined downward, making it less likely for the solder paste to flow down the anti-overflow slurry 14 to the end of the anti-overflow baffle 13. There are gaps between the upper and lower ends of each baffle 15 and the inner wall of the corresponding anti-overflow slurry 14, so that when there is too much solder paste at the anti-overflow baffle 13, it can flow back to the middle of the anti-overflow slurry 14 along the upper part of the baffle 15 under the blocking effect of the end seal of the anti-overflow slurry 14.

[0024] Working principle: During solder paste printing, the paste applicator extrudes the solder paste into strips onto the isolation screen. The printer drives the squeegee to move back and forth to spread the solder paste evenly. During this process, the dual-head motor 2 drives the drive gear 3 to rotate, which in turn drives the gear belt 6 to move, causing the lifting plate 7 at one end to move down and the lifting plate 7 at the other end to move up. The downward-moving squeegee strip 12 contacts the isolation screen and carries the solder paste in one direction. During this process, the solder paste enters the anti-overflow storage tank 14, making it difficult for the solder paste to overflow from both ends. It also ensures that the solder paste is evenly distributed in the anti-overflow storage tank 14, making the solder paste printing more uniform. At the same time, it is blocked inward by the anti-overflow baffle 13 and further protected by the secondary baffle 15, effectively preventing the solder paste from overflowing from both ends.

[0025] It should be noted that the various embodiments in this specification are described in a progressive manner, with each embodiment focusing on the differences from other embodiments. The same or similar parts between the various embodiments can be referred to each other.

[0026] The above description is only a description of the preferred embodiment of the present utility model and is not intended to limit the scope of the present utility model in any way. Any changes or modifications made by those skilled in the art based on the above disclosure shall fall within the protection scope of the claims.

Claims

1. An anti-overflow squeegee for a solder paste printing machine, comprising a squeegee holder body (1), characterized in that, A dual-head motor (2) is installed inside the tool holder body (1). Drive gears (3) are rotatably connected to both the left and right ends of the upper part of the tool holder body (1). The power output shafts at both ends of the dual-head motor (2) are respectively connected to the two drive gears (3). Driven gears (5) that cooperate with the corresponding drive gears (3) are rotatably connected to both the left and right ends of the lower part of the tool holder body (1). A gear belt (6) is connected to the drive gear (3) and the driven gear (5) at the same end of the tool holder body (1). Lifting plates (7) that can slide up and down are slidably connected to both the front and rear sides of the tool holder body (1). Each lifting... Each plate (7) is connected to the outer side of the two gear belts (6). Each lifting plate (7) is provided with a scraper strip (12) on its lower side. Each scraper strip (12) has outward-expanding anti-overflow baffles (13) on both the left and right sides, so that the two scraper strips (12) are approximately two brackets facing inward. Each scraper strip (12) is provided with an anti-overflow storage trough (14) with the opening facing inward on its lower side. Each anti-overflow storage trough (14) is sealed at the end of the corresponding anti-overflow baffle (13). Each anti-overflow storage trough (14) is provided with a baffle (15) at the position of the corresponding anti-overflow baffle (13). The outward end of each baffle (15) is inclined downward.

2. The anti-overflow squeegee for a solder paste printing machine according to claim 1, characterized in that, Each lifting plate (7) has a vertically arranged slide bar (8) with a T-shaped cross section in the middle, and the front and rear sides of the tool holder body (1) are provided with T-shaped slide rails (9) that are slidably connected to the corresponding slide bar (8).

3. The anti-overflow squeegee for a solder paste printing machine according to claim 1, characterized in that, Each gear belt (6) has a horizontal connecting strip (10) on the outer sides of both the front and rear sides. Each lifting plate (7) has multiple connecting slots (11) on both sides of the corresponding slide (8) that are distributed along its height direction and connected to the corresponding connecting strip (10).

4. The anti-overflow scraper for a solder paste printing machine according to claim 1, characterized in that, Both ends of the lifting plate (7) are provided with connecting plates (4) that are rotatably connected to the corresponding driven gears (5).

5. The anti-overflow scraper for a solder paste printing machine according to claim 1, characterized in that, Each overflow storage tank (14) has an arc-shaped cross section.

6. The anti-overflow squeegee for a solder paste printing machine according to claim 1, characterized in that, There is a gap between the upper and lower ends of each baffle (15) and the inner wall of the corresponding anti-overflow storage tank (14).

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