Closed glue scraping groove

Abstract

The utility model provides a closed glue scraping groove which comprises a glue groove body, a screen plate is arranged at the bottom of the glue groove body, and a glue scraping assembly is arranged in the glue groove body in a sliding mode. The top of the glue groove is covered with sealing cloth, reels are arranged at the two ends of the sealing cloth, the two reels are arranged at the two ends of the glue groove in the sliding direction of the glue scraping assembly respectively, and torsional springs are arranged in the reels and used for tightening the sealing cloth on the top face of the glue groove. The glue scraping assembly comprises a mounting plate embedded in the middle of the sealing cloth, the two ends of the mounting plate are slidably connected to the two sides of the glue groove respectively, a pair of parallel glue scraping plates is arranged at the bottom of the mounting plate, the bottom edges of the glue scraping plates are parallel to the net plate, the glue scraping plates are perpendicular to the moving direction of the glue scraping assembly, and a gap used for containing solder paste is formed between the two glue scraping plates. According to the scheme, dust and impurities can be effectively prevented from entering the glue tank, so that the product quality is ensured.

Description

Technical Field

[0001] The utility model belongs to the technical field of lead frame solder paste scraping equipment, in particular to a closed glue scraping groove. Background Art

[0002] In the production process of semiconductor devices, core bonding is an extremely important step. When bonding the core, you first need to apply solder paste to the base island of the lead frame, and then bond the wafer chip to the base island coated with solder paste. There are two main ways to apply solder paste to the base island in existing equipment. One is to use a needle plate to dip the solder paste, and then dot the solder paste on the base island; the other is to use a stencil to scrape the solder paste on the base island. The stencil will be pre-processed with through holes at the position where the solder paste needs to be scraped, and then the scraper will be used to scrape the solder paste above the stencil, so that the solder paste is filled from the through hole position to the base island. In the existing stencil scraping device, the solder paste on the stencil is usually exposed to the surrounding environment, and the surrounding impurities and dust are easily mixed into the solder paste, which has a certain impact on the quality of the final product. Utility Model Content

[0003] In order to solve the deficiencies of the prior art, the utility model provides a closed type scraper tank, which can effectively prevent dust and impurities from entering the tank, thereby ensuring the quality of the product.

[0004] In order to achieve the purpose of this utility model, the following scheme is proposed:

[0005] A closed glue scraping tank comprises: a glue tank, a mesh plate is provided at the bottom, a glue scraping assembly is slidably provided in the glue tank, a sealing cloth is covered on the top of the glue tank, and reels are provided at both ends of the glue tank, and the two reels are respectively provided at the two ends of the glue tank along the sliding direction of the glue scraping assembly, and a torsion spring is provided inside the reel to tighten the sealing cloth on the top surface of the glue tank.

[0006] The scraper assembly includes a mounting plate embedded in the middle of the sealing cloth, the two ends of the mounting plate are respectively slidably connected to the two sides of the glue groove, and a pair of parallel scraper plates are provided at the bottom of the mounting plate, whose bottom edges are parallel to the mesh plate, and the scraper plates are perpendicular to the moving direction of the scraper assembly, and there is a gap between the two scraper plates for accommodating solder paste.

[0007] The beneficial effect of the utility model is that a sealing cloth which moves with the scraper assembly is provided, and the sealing cloth is used to seal the glue groove, which can effectively prevent dust and impurities from entering the glue groove, thereby ensuring the quality of the product. BRIEF DESCRIPTION OF THE DRAWINGS

[0008] The drawings described herein are for illustrative purposes only of selected embodiments and not all possible implementations, and are not intended to limit the scope of the present invention.

[0009] Figure 1 Shown is a schematic diagram of the overall structure of the present application.

[0010] Figure 2 A schematic diagram of the internal structure of the glue tank is shown.

[0011] Figure 3 A cross-sectional view showing the overall structure of the present application.

[0012] Figure 4 A schematic structural diagram of a scraper assembly is shown.

[0013] Markings in the figure: glue groove -1, slide groove -11, socket -12, slot -13, temporary storage platform -14, guide rod -15, mesh plate -2, glue scraper assembly -3, mounting plate -31, glue scraper plate -32, sealing cloth -4, reel -41. DETAILED DESCRIPTION

[0014] In order to make the purpose, technical solutions and advantages of the embodiments of the utility model clearer, the implementation methods of the utility model are described in detail below in conjunction with the accompanying drawings, but the embodiments described in the utility model are only part of the embodiments of the utility model, rather than all the embodiments.

[0015] like Figures 1 to 4 As shown, a closed type scraping rubber groove comprises: a rubber groove 1, a mesh plate 2 is provided at the bottom, and a scraping rubber component 3 is slidably provided in the rubber groove 1. The top of the rubber groove 1 is covered with a sealing cloth 4, and both ends of the rubber groove 1 are provided with a reel 41, and the two reels 41 are respectively provided at the two ends of the rubber groove 1 along the sliding direction of the scraping rubber component 3, and a torsion spring is provided inside the reel 41 for tightening the sealing cloth 4 on the top surface of the rubber groove 1, and the sealing cloth 4 is made of cloth or plastic film.

[0016] The scraper assembly 3 includes a mounting plate 31 embedded in the middle of the sealing cloth 4, and the two ends of the mounting plate 31 are respectively slidably connected to the two sides of the glue groove 1 to maintain the stability of its mounting structure and avoid generating a large downward pressure on the sealing cloth 4 to ensure the flatness and tautness of the sealing cloth 4. A pair of parallel scraper plates 32 are provided at the bottom of the mounting plate 31, and the bottom edges thereof are parallel to the screen plate 2, and the scraper plates 32 are perpendicular to the moving direction of the scraper assembly 3, and there is a gap between the two scraper plates 32 for accommodating solder paste.

[0017] During the scraping process, the scraping assembly 3 is driven to move back and forth by a linear moving device, and the solder paste accumulated on the top surface of the stencil 2 is scraped by the scraper plate 32, so that the solder paste is filled into each mesh of the stencil 2 to complete the scraping work; during this process, the sealing cloth 4 will move with the mounting plate 31, and during the movement, the sealing cloth 4 wound by the reel 41 away from the mounting plate 31 will be pulled out to cover the glue groove 1 behind the mounting plate 31, and the other reel 41 will automatically wind the sealing cloth 4 through the internal torsion spring, so that the sealing cloth 4 is always in a taut state, thereby ensuring the sealing of the sealing cloth 4 to the glue groove 1; during the scraping process, the sealing cloth 4 on both sides of the mounting plate 31 always completely covers the glue groove 1, effectively sealing impurities and dust from entering the glue groove 1, which helps to ensure the quality of the product.

[0018] Preferably, the reel 41 is detachably disposed on the outer wall of the glue slot 1 to facilitate replacement of the stencil and filling of solder paste from above the glue slot 1 .

[0019] Preferably, Figure 2 , Figure 3 As shown, both inner walls of the glue groove 1 are provided with sliding grooves 11 , and the edges of the sealing cloth 4 are slidably disposed in the sliding grooves 11 on both sides, so as to improve the sealing performance of the glue groove 1 .

[0020] Preferably, the mesh plate 2 is detachably arranged at the bottom of the glue groove 1, and can be detachably connected by means of screw connection or slot insertion to adapt to different products.

[0021] Preferably, Figure 2 As shown, a socket 12 is provided on one side of the bottom of the glue groove 1, and slots 13 are provided on the inner walls on both sides of the glue groove 1 corresponding to the two sides of the socket 12. The socket 12 is used to pass the mesh plate 2, and the two sides of the mesh plate 2 are respectively inserted into the slots 13 on both sides to facilitate the disassembly and assembly of the mesh plate 2 from the side. The outside of the glue groove 1 is provided with screws or pins for fixing the mesh plate 2 to prevent the mesh plate 2 from being damaged.

[0022] Preferably, Figure 2 As shown, a temporary storage platform 14 is provided at the end of the bottom of the glue groove 1 opposite to the socket 12, which is flush with the top surface of the stencil 2, and its width is greater than the distance between the outer walls of the two scrapers 32. When replacing the stencil 2, the scraper 32 can be used to push the solder paste onto the temporary storage platform 14, and then the stencil 2 can be pulled out to improve the convenience of replacing the stencil 2.

[0023] The above is only a preferred embodiment of the utility model, and does not mean that it is the only one or limit the utility model. Those skilled in the art should understand that various changes or equivalent replacements made to the utility model without departing from the scope of the utility model are within the scope of protection of the utility model.

Claims

1. A closed scraper tank, comprising: A glue groove (1) is provided with a mesh plate (2) at the bottom, and a glue scraping assembly (3) is slidably provided in the glue groove (1), characterized in that the top of the glue groove (1) is covered with a sealing cloth (4), and reels (41) are provided at both ends of the glue groove (1), and the two reels (41) are respectively provided at the two ends of the glue groove (1) along the sliding direction of the glue scraping assembly (3), and a torsion spring is provided inside the reel (41) for tightening the sealing cloth (4) on the top surface of the glue groove (1); The scraper assembly (3) comprises a mounting plate (31) embedded in the middle of the sealing cloth (4), the two ends of the mounting plate (31) are respectively slidably connected to the two sides of the glue groove (1), and a pair of parallel scraper plates (32) are provided at the bottom of the mounting plate (31), the bottom edges of which are parallel to the mesh plate (2), and the scraper plates (32) are perpendicular to the moving direction of the scraper assembly (3), and there is a gap between the two scraper plates (32) for accommodating solder paste; The reel (41) is detachably mounted on the outer wall of the glue groove (1); Slide grooves (11) are provided on both inner walls of the glue groove (1), and the edges of the sealing cloth (4) are slidably arranged in the slide grooves (11) on both sides. The mesh plate (2) is detachably arranged at the bottom of the glue groove (1).

2. A closed scraper tank according to claim 1, characterized in that: A plug opening (12) is provided on one side of the bottom of the glue groove (1), and slots (13) are provided on the inner walls on both sides of the glue groove (1) corresponding to the two sides of the plug opening (12). The plug opening (12) is used to pass the mesh plate (2), and the two sides of the mesh plate (2) are respectively inserted into the slots (13) on the two sides.

3. A closed type scraper tank according to claim 2, characterized in that: A temporary storage platform (14) is provided at the end of the bottom of the glue groove (1) opposite to the insertion opening (12) and is flush with the top surface of the mesh plate (2). The width of the temporary storage platform (14) is greater than the distance between the outer walls of the two scraper plates (32).

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