Manual glue scraper

Abstract

The present application relates to an artificial scraper, comprising a handle and a first scraper detachably mounted on the handle, the first scraper being a shovel-shaped hard plate, the lower part of which is a first mounting portion for connecting to the handle, the upper part being a first working portion, and the end of the first working portion having a serrated first working surface; and also comprising a second scraper arranged in parallel with the first scraper, the lower part of the second scraper being a second mounting portion for connecting to the first scraper, the upper part being a second working portion, and the end of the second working portion having a smooth second working surface; the second working surface is used to spread glue on the surface of a workpiece in a film-like shape according to the required thickness, and the first working surface is used to process the glue film spread on the second working surface into a serrated glue shape. The present invention has a stable angle when applying glue manually, is not easily affected by the strength of the glue applied by different operators, has good consistency in glue application thickness, has few bubbles, and has good practicality.

Description

Technical Field

[0001] The invention belongs to the technical field of composite material processing, and in particular relates to an artificial rubber scraper. Background Art

[0002] In the process of making composite materials, glue needs to be evenly applied to the surface of the workpiece. The traditional method is to apply glue to the surface of the workpiece with a brush. This method of applying glue has problems such as uncontrollable glue amount, uneven thickness, uneven surface, many bubbles, and uneven distribution, which affects the subsequent bonding strength of the workpiece.

[0003] The current improvement means is to use a brush plate with a serrated end to perform manual glue spreading operations. For example, a Chinese patent with application number CN201510310091.3 and titled "A Glue Spreading Device Operated by a Silicon Wafer Sticking Rod" discloses a glue spreading device operated by a silicon wafer sticking rod, including a glue spreading body and a handle, the handle is fixed on the glue spreading body, the glue spreading body includes a crossbeam, a scraper plate is connected to the lower end of the crossbeam, a serrated notch is provided at the lower end of the scraper plate, and two sliding positioning plates are also sleeved on the scraper plate, the sliding positioning plate includes a positioning plate and a sliding connection part, the positioning plate is fixed to the sliding connection part by screws, and the sliding connection part is movably fixed in a sliding groove provided on the crossbeam by bolts. The glue spreading device operated by the silicon wafer sticking rod can evenly spread glue on the glass through the scraper plate with a serrated notch, and ensure that the glue level is level and there are no bubbles, and the glue spreading device operated by the silicon wafer sticking rod has good versatility. The glue application amount and glue application thickness of the above-mentioned glue application method are controllable, the glue application is uniform, and the large surface area of ​​the formed serrated glue surface is conducive to the overflow or destruction of the original bubbles in the glue. From the perspective of use effect, it is better than a brush.

[0004] With the development of technology, in the current adhesive application field, scraper boards are widely used to evenly apply the colloid on the surface of the substrate to achieve the bonding process. However, there are some problems in the application of current scraper boards, mainly focusing on two aspects: quantitative application and bubble removal.

[0005] In general, the current scraper still has the following defects and shortcomings:

[0006] 1. Unable to quantitatively apply glue: Most squeegees are difficult to achieve accurate quantitative application, which leads to uneven application of the glue. In some precision applications, the inability to accurately control the amount of glue applied may lead to a decline in product quality and even increase the scrap rate in the production process.

[0007] 2. Bubble removal problem: Traditional squeegees are prone to produce bubbles in the colloid during the gluing process and the subsequent bonding process due to unreasonable design or structural defects. These bubbles may lead to insufficient bonding strength during the bonding process, affecting the quality and performance of the final product.

[0008] 3. Differences in applicability for different colloids: Some squeegee blades are designed to be suitable for specific types of colloids, but when faced with colloids with different viscosities and rheological properties, their sizing effects may be greatly reduced and lack versatility.

[0009] In summary, the existing scraper has defects in quantitative glue application, bubble removal, stability and applicability, which directly affect the effect of colloid application and product quality. In addition, due to the different habits of each person when applying glue manually, the inclination angle and strength of the brush plate are different when applying glue, resulting in differences in the thickness of the glue, which leads to quality differences in product batches, which is also a problem worthy of attention. Therefore, it is necessary to propose a new type of scraper through innovative design to overcome the shortcomings of these existing technologies. Summary of the invention

[0010] The purpose of the invention is to provide an artificial scraper which has a stable angle when applying glue manually, is not easily affected by the glue applying strength of different operators, has good consistency in glue applying thickness, and has few bubbles.

[0011] In order to solve the above technical problems, the present invention discloses an artificial rubber scraper, comprising a handle and a first scraper detachably mounted on the handle, the first scraper being a shovel-shaped hard plate, the lower portion of which is a first mounting portion for connecting with the handle, the upper portion of which is a first working portion, and the end of the first working portion has a serrated first working surface;

[0012] It also includes a second scraper arranged in parallel with the first scraper, the lower part of the second scraper is a second mounting part for connecting with the first scraper, the upper part is a second working part, and the end of the second working part has a smooth second working surface; the second working surface is used to spread the glue in a film-like form on the surface of the workpiece according to the required thickness, and the first working surface is used to process the glue film spread on the second working surface into a serrated glue shape.

[0013] Preferably, a first mounting hole is provided in the middle of the first scraper, a second mounting hole is provided on the second mounting portion corresponding to the first mounting hole, a pad is provided between the first scraper and the second scraper, and the second scraper is fixed to the first scraper by fasteners passing through the first mounting hole, the pad and the second mounting hole.

[0014] Preferably, one or both ends of the second working surface are provided with a limiting column for controlling the distance between the second working surface and the workpiece surface and the thickness of the glue, and the limiting column protrudes from the second working surface; the length of the first working surface is not less than that of the second working surface.

[0015] Preferably, a rolling device is provided on the top of the limiting column, and the rolling device includes a roller or a ball.

[0016] Preferably, the spacer blocks have multiple different thicknesses, and the distance between the first scraper and the second scraper can be adjusted by replacing the spacers with different thicknesses.

[0017] Preferably, the first mounting hole is a waist-shaped hole arranged along the length direction of the handle, so that the height of the second scraper relative to the first scraper can be adjusted up and down.

[0018] Preferably, a third mounting hole is processed on the first scraper between the first mounting hole and the first working surface, and an adjusting bolt threadedly connected to the third mounting hole is provided in the third mounting hole. The adjusting bolt is rotated so that the adjusting bolt is abutted against the second scraper to prevent excessive deformation of the second working part.

[0019] Preferably, a first limiting groove parallel to the first mounting hole is processed on one or both sides of the first mounting hole, and a first limiting protrusion matched with the limiting groove is provided on one side of the cushion block adjacent to the first scraper, and the first limiting protrusion is inserted into the first limiting groove;

[0020] A second limiting groove is provided on the side of the second mounting part near the pad block, and a second limiting protrusion adapted to the second limiting groove is provided on the side of the pad block adjacent to the second mounting part, and the second limiting protrusion is inserted into the second limiting groove; or a second limiting protrusion is provided on the side of the second mounting part near the pad block, and a second limiting groove adapted to the second limiting groove is provided on the side of the pad block adjacent to the second mounting part, and the second limiting protrusion is inserted into the second limiting groove.

[0021] Preferably, the serrated first working surface has isosceles trapezoidal serrations and inverted trapezoidal tooth grooves; the upper base length of the isosceles trapezoidal serrations is a, and the lower base angle Δ is 70° to 80°; the upper base of the inverted trapezoidal tooth groove is 0.8a, and the lower base length is 1.5a; wherein, when the viscosity of the glue used is between 30,000 and 80,000 mPa·s, the lower base angle Δ increases by 2.5° for every 10,000 mPa·s increase in the glue viscosity.

[0022] Preferably, the upper base length a is positively correlated with the amount of glue applied Q, and the value of the upper base length a is determined according to the formula a=Q / (161×ρ×tanΔ); wherein a: upper base length, unit: mm; Q: amount of glue applied, unit: g / m 2 ; ρ: glue density, unit g / cm 3 : Δ: bottom angle, unit: °.

[0023] The artificial scraper of the present invention has at least the following advantages:

[0024] 1. The second scraper first scrapes out a smooth film, and then the first scraper arranges the film into a serrated adhesive pattern. The serrated adhesive pattern prepared in this way has better consistency and is conducive to reducing the generation of bubbles during the bonding of composite materials.

[0025] 2. The height and spacing of the first scraper and the second scraper are adjustable, so that the angle is stable when the glue is applied manually, and it is not easily affected by the glue application strength of different operators. The glue application thickness is consistent and has good practical value.

[0026] 3. By setting the adjusting bolt to counteract the second scraper, the second working part can be prevented from bending and deforming during the gluing process, which is beneficial to the stability of the film thickness and ensures the bonding quality.

[0027] 4. Different from the sharp serrated glue pattern produced by conventional scrapers, the trapezoidal serrations of the artificial scraper of the present invention are optimized, and the trapezoidal serrated glue pattern produced during glue application is more stable, which can effectively prevent the sharp serrated glue from rolling up and mixing with air during bonding pressure, and the serrated glue initially contains less air, which is conducive to faster discharge of the air contained in the serrated glue during bonding, and the bonding stability and efficiency are higher. BRIEF DESCRIPTION OF THE DRAWINGS

[0028] Figure 1 This is an exploded view of an artificial scraper.

[0029] Figure 2 for Figure 1 Schematic diagram of the structure of the middle pad.

[0030] Figure 3 It is a schematic diagram of the local structure of a first working surface.

[0031] Figure 4 This is a schematic diagram of the morphological changes of a serrated adhesive when bonding workpieces.

[0032] Figure 1 100-handle, 200-first scraper, 210-first mounting part, 220-first working part, 230-first working surface, 231-isosceles trapezoidal serrations, 232-inverted trapezoidal tooth grooves, 240-first mounting hole, 250-third mounting hole, 260-first limiting groove, 300-pad, 310-first limiting protrusion, 320-second limiting groove, 400-second scraper, 410-second mounting part, 420-second working part, 430-second working surface, 440-second mounting hole, 450-limiting column, 460-second limiting protrusion, 500-fastener, 600-adjusting bolt, 700-workpiece, 800-serrated rubber type. DETAILED DESCRIPTION

[0033] The present invention is further described in detail below through examples so that those skilled in the art can implement the invention with reference to the description.

[0034] It should be understood that the terms such as “having”, “including” and “comprising” used herein do not exclude the existence or addition of one or more other elements or combinations thereof.

[0035] like Figure 1-4 As shown, a manual rubber scraper includes a handle 100 and a first scraper 200 detachably mounted on the handle 100. The first scraper 200 is a shovel-shaped hard plate, the lower part of which is a first mounting portion 210 for connecting with the handle 100. The first mounting portion 210 is fixed to the handle 100 by a fastener 500, and the upper part is a first working portion 220. The end of the first working portion 220 has a serrated first working surface 230.

[0036] It also includes a second scraper 400 arranged in parallel with the first scraper 200. The lower part of the second scraper 400 is a second mounting part 410 for connecting with the first scraper 200, and the upper part is a second working part 420. The end of the second working part 420 has a smooth second working surface 430; the second working surface 430 is used to spread the glue in a film-like manner on the surface of the workpiece 700 according to the required thickness, and the first working surface 230 is used to process the glue film spread on the second working surface 430 into a serrated glue pattern 800.

[0037] A first mounting hole 240 is provided in the middle of the first scraper 200, and a second mounting hole 440 is provided on the second mounting portion 410 corresponding to the first mounting hole 240. A cushion block 300 is provided between the first scraper 200 and the second scraper 400. The second scraper 400 is fixed to the first scraper 200 by using a fastener 500 passing through the first mounting hole 240, the cushion block 300 and the second mounting hole 440.

[0038] One end or both ends of the second working surface 430 are provided with a limiting column 450 for controlling the distance between the second working surface 430 and the workpiece surface and the thickness of the glue brushing. The limiting column 450 protrudes from the second working surface 430. In this embodiment, the height of the limiting column 450 is adapted to the height of the isosceles trapezoidal sawtooth 231; the length of the first working surface 230 is not less than the second working surface 430. Further, as a specific embodiment provided by the present invention, the limiting column 450 can be set to be height-adjustable or replaceable to meet different requirements for glue film thickness.

[0039] Furthermore, as a specific implementation mode provided by the present invention, a rolling device such as a roller or a ball may be provided on the top of the limit column 450 to improve the smoothness of the manual scraper during operation.

[0040] The cushion blocks 300 have a plurality of different thicknesses. By replacing the cushion blocks 300 of different thicknesses, the distance between the first scraper 200 and the second scraper 400 can be adjusted.

[0041] The first mounting hole 240 is a waist-shaped hole arranged along the length direction of the handle 100 , so that the height of the second scraper 400 relative to the first scraper 200 can be adjusted up and down.

[0042] A third mounting hole 250 is processed on the first scraper 200 between the first mounting hole 240 and the first working surface 230. An adjusting bolt 600 threadedly connected to the third mounting hole 250 is provided in the third mounting hole 250. The adjusting bolt 600 is rotated so that the adjusting bolt 600 is abutted against the second scraper 400 to prevent excessive deformation of the second working part 420.

[0043] like Figure 2 As shown, a first limiting groove 260 parallel to the first mounting hole 240 is processed on one or both sides of the first mounting hole 240, and a first limiting protrusion 310 adapted to the limiting groove is provided on one side of the cushion block 300 adjacent to the first scraper 200, and the first limiting protrusion is inserted into the first limiting groove;

[0044] A second limiting protrusion 460 is provided on the side of the second mounting portion 410 close to the cushion block 300, and a second limiting groove 320 adapted to the second limiting groove is provided on the side of the cushion block 300 adjacent to the second mounting portion 410, and the second limiting protrusion is inserted into the second limiting groove.

[0045] Further, such as Figure 3 As shown, as a specific embodiment provided by the present invention, the serrated first working surface 230 has isosceles trapezoidal serrations 231 and inverted trapezoidal tooth grooves 232. The upper base length of the isosceles trapezoidal serrations 231 is a, and the lower base angle Δ is 70° to 80°. The upper base of the inverted trapezoidal tooth groove is 0.8a, and the lower base length is 1.5a; wherein, when the viscosity of the glue used is between 30,000 and 80,000 mPa·s, the lower base angle Δ increases by 2.5° for every 10000 mPa·s increase in the viscosity of the glue. Specifically, the corresponding relationship between the viscosity of the glue and the lower base angle can be referred to the following table:

[0046] Glue viscosity mPa·s 30000~40000 40001~50000 50001~60000 60001~70000 70001~80000 Bottom angle Δ 70.0° 72.5° 75.0° 77.5° 80.0°

[0047] The upper base length a is positively correlated with the amount of glue applied Q. The value of the upper base length a is determined according to the formula a=Q / (161×ρ×tanΔ); where a: upper base length, unit: mm; Q: amount of glue applied, unit: g / m 2 ; ρ: glue density, unit g / cm 3: Δ: angle of the bottom, unit: °. Generally speaking, the greater the viscosity of the glue, the more stable the trapezoidal serrated glue pattern is. Properly increasing the bottom angle can make the trapezoidal serrated glue pattern taller, which is conducive to optimizing the bonding effect. The larger the amount of glue required, the longer the upper bottom length can be increased according to the formula, making the single trapezoidal serrated glue pattern wider, which can more accurately meet the glue amount requirements.

[0048] In this embodiment, the first working surface structure is designed as follows:

[0049] project Numeric unit Sawtooth platform a= 1 mm Width of sawtooth b1=1.5a 1.5 mm Width below the sawtooth b2=0.8a 0.800 mm Bottom angle Δ 75 ° Sawtooth height h= 1.306 mm Width of scraper w= 100 mm Number of teeth n= 40 indivual Single cross-sectional area s= 1.50 <![CDATA[mm 2 ]]> Total cross-sectional area S= 60.1 <![CDATA[mm 2 ]]> Glue density ρ= 1.4 <![CDATA[g / cm 3 ]]> Glue quantity per unit area Q= 841.2 <![CDATA[g / m 2 ]]>

[0050] Where, Q = 1000 / (a+b1)×1 / 2(b1+b2)h×ρ;

[0051] a=Q / (161×ρ×tanΔ);

[0052] The isosceles trapezoidal serrations 231 and inverted trapezoidal tooth grooves 232 are optimized in design, and the glue application amount can be more precisely controlled. In particular, isosceles trapezoidal serrations and inverted trapezoidal tooth grooves of corresponding sizes are used according to different glue characteristics (density, viscosity, glue application amount, etc.). The trapezoidal serrated glue pattern produced during glue application is more stable, and can effectively prevent the sharp serrated glue (tip end) of the conventional scraper from rolling up and mixing with air during bonding pressure, and the serrated glue initially contains less air. The trapezoidal serrated glue pattern produced by the isosceles trapezoidal serrations and inverted trapezoidal tooth grooves designed according to different glue characteristics is more conducive to faster discharge of the air contained in the serrated glue during bonding, and the bonding stability and efficiency are higher.

[0053] Furthermore, in practical applications, corresponding manual scrapers can be customized according to the density of different glues, the amount of glue applied, etc., or a group of manual scrapers of different models can be made, and a suitable manual scraper can be selected for glue application during operation.

[0054] How to use: When using, place the manual scraper on the surface of the workpiece, adjust the height of the second scraper 400 so that the first scraper 200 and the second scraper 400 have an inclination angle that is comfortable for the operator, and then fix the second scraper 400 to start applying glue; if the film thickness and glue application accuracy are very high during production, it should be adjusted until the manual scraper stands naturally on the plane, and the first scraper 200 and the second scraper 400 are both in a vertical state. Figure 4 As shown, the morphological changes of the serrated glue profile when the workpieces are bonded are shown.

[0055] Although the embodiments of the present invention have been disclosed as above, they are not limited to the applications listed in the specification and the implementation modes. They can be fully applied to various fields suitable for the present invention. For those familiar with the art, additional modifications can be easily implemented. Therefore, without departing from the general concept defined by the claims and the scope of equivalents, the present invention is not limited to the specific details and the embodiments shown and described herein.

Claims

1. An artificial scraper, characterized in that: It comprises a handle and a first scraper detachably mounted on the handle, wherein the first scraper is a shovel-shaped hard plate, the lower part of which is a first mounting part for connecting with the handle, the upper part is a first working part, and the end of the first working part has a serrated first working surface; The second scraper is also provided in parallel with the first scraper, wherein the lower part of the second scraper is a second mounting part for connecting with the first scraper, and the upper part is a second working part, and the end of the second working part has a smooth second working surface; the second working surface is used to spread the glue in a film shape according to the required thickness on the surface of the workpiece, and the first working surface is used to process the glue film spread on the second working surface into a serrated glue shape; A first mounting hole is provided in the middle of the first scraper, and a second mounting hole is provided on the second mounting portion corresponding to the first mounting hole; The first mounting hole is a waist-shaped hole arranged along the length direction of the handle, so that the height of the second scraper relative to the first scraper can be adjusted up and down; A third mounting hole is processed on the first scraper between the first mounting hole and the first working surface. An adjusting bolt threadedly connected to the third mounting hole is arranged in the third mounting hole. The adjusting bolt is rotated so that the adjusting bolt is abutted against the second scraper to prevent excessive deformation of the second working part.

2. The artificial scraper according to claim 1, characterized in that: A cushion block is provided between the first scraper and the second scraper, and the second scraper is fixed to the first scraper by fasteners passing through the first mounting hole, the cushion block and the second mounting hole.

3. The artificial scraper according to claim 1, characterized in that: One end or both ends of the second working surface are provided with a limiting column for controlling the distance between the second working surface and the workpiece surface and the thickness of the glue brushing, and the limiting column protrudes from the second working surface; the length of the first working surface is not less than that of the second working surface.

4. The artificial scraper according to claim 3, characterized in that: A rolling device is provided on the top of the limiting column, and the rolling device includes a roller or a ball.

5. The artificial scraper according to claim 2, characterized in that: The pads have a plurality of different thicknesses, and the distance between the first scraper and the second scraper can be adjusted by replacing the pads with different thicknesses.

6. The artificial scraper according to claim 5, characterized in that: A first limiting groove parallel to the first mounting hole is processed on one side or both sides of the first mounting hole, and a first limiting protrusion matched with the limiting groove is provided on one side of the cushion block adjacent to the first scraper, and the first limiting protrusion is inserted into the first limiting groove; A second limiting groove is provided on the side of the second mounting part near the pad block, and a second limiting protrusion adapted to the second limiting groove is provided on the side of the pad block adjacent to the second mounting part, and the second limiting protrusion is inserted into the second limiting groove; or a second limiting protrusion is provided on the side of the second mounting part near the pad block, and a second limiting groove adapted to the second limiting groove is provided on the side of the pad block adjacent to the second mounting part, and the second limiting protrusion is inserted into the second limiting groove.

7. The artificial scraper according to claim 1, characterized in that: The serrated first working surface has isosceles trapezoidal serrations and inverted trapezoidal tooth grooves; the upper base length of the isosceles trapezoidal serrations is a, and the lower base angle Δ is 70° to 80°; the upper base of the inverted trapezoidal tooth groove is 0.8a, and the lower base length is 1.5a; wherein, when the viscosity of the glue used is between 30,000 and 80,000 mPa·s, the lower base angle Δ increases by 2.5° for every 10,000 mPa·s increase in the viscosity of the glue.

8. The artificial scraper according to claim 7, characterized in that: The upper base length a is positively correlated with the glue coating amount Q, and the value of the upper base length a is determined according to the formula a=Q / (161×ρ×tanΔ); Where a: upper base length, unit: mm; Q: glue amount, unit: g / m 2 ; ρ: glue density, unit g / cm 3 : Δ: bottom angle, unit: °.

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