PUR hot melt adhesive scraper

Abstract

The utility model relates to a PUR hot melt adhesive scraper which comprises a support and a motor (4) arranged at the top of the support, the motor (4) is provided with a driving mechanism moving in the vertical direction, and the driving mechanism is connected with a driving plate (5). A scraper moving frame (6) is connected to the side face of the driving plate (5), an air cylinder (7) is arranged in the middle of the scraper moving frame (6) and connected with a connecting plate (72) through an air cylinder driving rod (71), cylindrical connectors (721) are arranged at the two ends of the connecting plate (72), a connecting frame (73) is connected to the connectors (721), a knife rest (74) is connected to the bottom of the connecting frame (73), a groove is formed in the knife rest (74), and a second fixing plate (76) is connected into the groove. The second fixing plate (76) is further connected with a first fixing plate (75), and a scraper (77) is connected between the second fixing plate (76) and the first fixing plate (75). According to the device, the accurate height and angle adjustment of the scraper can be realized, and the flexibility and adaptability of operation are ensured.

Description

Technical Field

[0001] This utility model relates to a scraper, specifically a PUR hot melt adhesive scraper. Background Technology

[0002] PUR hot melt adhesive, short for moisture-curing reactive polyurethane hot melt adhesive, is a one-component, 100% solids adhesive. Its main component is isocyanate-terminated polyurethane prepolymer. This adhesive melts into a fluid state upon heating, facilitating application. When two substrates are bonded and cooled, the adhesive layer solidifies, providing adhesion. Subsequently, the PUR hot melt adhesive undergoes a chemical reaction with the moisture in the air and on the surfaces of the substrates, extending its chains to form a high-cohesive polymer, significantly improving adhesion, heat resistance, and low-temperature resistance. PUR hot melt adhesive is renowned for its adjustable adhesion and toughness (elasticity), exhibiting excellent bond strength, temperature resistance, chemical resistance, and aging resistance. Due to its extremely high reactivity, PUR hot melt adhesive shows excellent adhesion to a variety of materials, making it one of the most important adhesive products in the industry, widely used in packaging, wood processing, automotive, textile, electromechanical, aerospace, and other sectors of the national economy.

[0003] After curing, PUR hot melt adhesive needs to be applied to a substrate and undergo a series of rigorous tests to ensure its performance and safety. These tests include visual inspection, solubility testing, and molecular weight testing to ensure that the PUR hot melt adhesive meets quality standards. After testing, it is sometimes necessary to remove the PUR hot melt adhesive from the substrate, which is essential in some applications, such as product rework or component replacement. Since the substrate surface may not be completely smooth, this increases the difficulty of removing the PUR hot melt adhesive. Uneven surfaces may result in inconsistent adhesive layer thickness, affecting the curing effect and bonding performance of the PUR hot melt adhesive. Therefore, specific methods and tools, such as scrapers, solvents, hot air guns, or sandpaper, are required for removal to adapt to different substrates and adhesive layer conditions. Existing scrapers, when scraping uneven surfaces, either incompletely remove the adhesive or damage the substrate. Utility Model Content

[0004] To solve the above-mentioned technical problems, the purpose of this utility model is to provide a scraper that can avoid damaging the surface of a substrate coated with PUR hot melt adhesive.

[0005] The technical solution of this utility model is as follows:

[0006] A PUR hot melt adhesive scraper, characterized in that: it includes a bracket, a motor (4) disposed on the top of the bracket, the motor (4) being provided with a drive mechanism that moves in the vertical direction, and the drive mechanism being connected to a drive plate (5);

[0007] The drive plate (5) is connected to a scraper moving frame (6) on its side. A cylinder (7) is provided in the middle of the scraper moving frame (6). The cylinder (7) is connected to a connecting plate (72) through a cylinder drive rod (71). The connecting plate (72) is provided with cylindrical connectors (721) at both ends. A connecting frame (73) is connected to the connector (721). A blade holder (74) is connected to the bottom of the connecting frame (73). A groove is provided in the blade holder (74). A second fixing plate (76) is connected in the groove. The second fixing plate (76) is also connected to a first fixing plate (75). A scraper (77) is connected between the second fixing plate (76) and the first fixing plate (75).

[0008] Furthermore, the bracket includes two upright plates (1) arranged opposite to each other, a side plate (2) connected to the sides of the two upright plates (1), and an upper fixing plate (3) vertically connected to the top of the side plate (2), and the motor (4) is mounted on the upper fixing plate (3).

[0009] Furthermore, the drive mechanism includes a set of shaft fixing seats (41) disposed on the side plate (2), a lead screw (42) rotatably connected to the shaft fixing seat (41), and a drive block (43) disposed on the lead screw (42). The drive end of the motor (4) is connected to the lead screw (42), and the drive plate (5) is connected to the drive block (43).

[0010] Furthermore, a set of mounting blocks (21) is provided on the side plate (2), a slide rail (22) is provided on the mounting block (21), a slider (23) is slidably connected on the slide rail (22), and the slider (23) is connected to the drive plate (5).

[0011] Furthermore, the second fixing plate (76) and the first fixing plate (75) are each provided with a serrated engaging groove on their opposite sides, and the scraper (77) is provided with serrated engaging protrusions on both sides, and the engaging protrusions are installed into the engaging groove.

[0012] Furthermore, an elastic column (64) is provided at the top center of the scraper moving frame (6), and the top of the cylinder (7) is connected to the elastic column (64).

[0013] Furthermore, cylindrical through grooves are provided on the left and right sides of the scraper moving frame (6), and a sliding sleeve (61) is provided in the through groove. A sliding column (62) is slidably connected in the sliding sleeve (61), and a crossbar (63) is connected between the tops of the sliding columns (62). The bottom of the sliding column (62) is connected to the connecting plate (72).

[0014] By means of the above solution, this utility model has at least the following advantages:

[0015] It enables precise height and angle adjustment of the scraper, ensuring operational flexibility and adaptability; the polyurethane scraper is soft and does not damage the substrate, and the serrated interlocking connection provides greater connection stability; the elastic column made of hard sponge can adapt to uneven substrates and protect the material from damage; and the sliding sleeve and sliding column structure on both sides of the scraper moving frame further enhances the overall stability and durability.

[0016] The above description is only an overview of the technical solution of this utility model. In order to better understand the technical means of this utility model and to implement it in accordance with the contents of the specification, the preferred embodiments of this utility model are described in detail below with reference to the accompanying drawings. Attached Figure Description

[0017] To more clearly illustrate the technical solutions of the embodiments of this utility model, the drawings used in the embodiments will be briefly introduced below. It should be understood that the following drawings only show a certain embodiment of this utility model and should not be regarded as a limitation on the scope. For those skilled in the art, other related drawings can be obtained based on these drawings without creative effort.

[0018] Figure 1 This is a schematic diagram of the structure of this utility model. Figure 1 ;

[0019] Figure 2 This is a schematic diagram of the structure of this utility model. Figure 2 ;

[0020] Figure 3 This is a side view of the present invention;

[0021] In the picture:

[0022] 1-Upright board;

[0023] 2-Side plate; 21-Mounting block; 22-Slide rail; 23-Slider;

[0024] 3-Upper fixing plate;

[0025] 4-Motor; 41-Shaft mounting base; 42-Lead screw; 43-Drive block;

[0026] 5-Driver board;

[0027] 6-Scraper moving frame; 61-Sliding sleeve; 62-Sliding column; 63-Crossbar; 64-Elastic column;

[0028] 7-Cylinder; 71-Cylinder drive rod; 72-Connecting plate; 721-Connector; 73-Connecting frame; 74-Tool holder; 75-First fixing plate; 76-Second fixing plate; 77-Scraper. Detailed Implementation

[0029] The specific embodiments of this utility model will be further described in detail below with reference to the accompanying drawings and examples. The following examples are used to illustrate this utility model, but are not intended to limit the scope of this utility model.

[0030] See Figures 1-3 A preferred embodiment of the present invention describes a PUR hot melt adhesive scraper, which includes a bracket. The bracket includes two upright plates 1 arranged opposite each other, side plates 2 connected to the sides of the two upright plates 1, and an upper fixing plate 3 vertically connected to the top of the side plates 2. A motor 4 is mounted on the upper fixing plate 3. The two upright plates 1 are vertically arranged on the horizontal plane, the side plates 2 are perpendicular to the horizontal plane, and the upper fixing plate 3 is parallel to the horizontal plane. The connection of the above-mentioned plates is generally by welding.

[0031] A motor 4 is installed at the top of the bracket. The motor 4 has a drive mechanism that moves vertically. The drive mechanism is connected to a drive plate 5. The drive mechanism includes a set of shaft fixing seats 41 mounted on the side plate 2, a lead screw 42 rotatably connected to the shaft fixing seats 41, and a drive block 43 mounted on the lead screw 42. The drive end of the motor 4 is connected to the lead screw 42, and the drive plate 5 is connected to the drive block 43. By driving the motor 4, the lead screw 42 can be rotated, thereby driving the drive block 43 to move on the lead screw 43, realizing the up and down movement of the drive plate 5.

[0032] To ensure the stability of the movement of the drive plate 5, a set of mounting blocks 21 is also provided on the side plate 2. The mounting blocks 21 are equipped with slide rails 22, and sliders 23 are slidably connected to the slide rails 22. The sliders 23 are connected to the drive plate 5.

[0033] A scraper moving frame 6 is connected to the side of the drive plate 5. A cylinder 7 is located in the middle of the scraper moving frame 6. The cylinder 7 is connected to a connecting plate 72 via a cylinder drive rod 71. The connecting plate 72 has cylindrical connectors 721 at both ends, and a connecting frame 73 is connected to the connectors 721. The angle of the scraper can be adjusted according to the specific angle between the connecting frame 73 and the connectors 721. A blade holder 74 is connected to the bottom of the connecting frame 73. A groove is provided in the blade holder 74, and a second fixing plate 76 is connected in the groove. The second fixing plate 76 is also connected to a first fixing plate 75. A scraper 77 is connected between the second fixing plate 76 and the first fixing plate 75. Driven by the cylinder 7, the connecting plate 72 can be moved up and down, thereby moving the scraper 77 up and down, allowing the scraper 77 to move to a specified working height.

[0034] The second fixing plate 76 and the first fixing plate 75 are both provided with serrated engaging grooves on their opposite sides. The scraper 77 is provided with serrated engaging protrusions on both sides. The engaging protrusions are installed into the engaging grooves. The scraper 77 in this device is made of polyurethane material. Compared with metal scrapers, it has the characteristics of being soft and not damaging the substrate. Therefore, the serrated engaging connection is used when connecting, resulting in a larger connection surface and greater stability.

[0035] The scraper moving frame 6 has an elastic column 64 at the top center. The top of the cylinder 7 is connected to the elastic column 64. The elastic column 64 is made of hard sponge. The hard sponge has a certain elasticity, which allows the scraper 77 to have a certain amount of expansion and contraction space when facing uneven substrates, thereby protecting the substrate.

[0036] The scraper moving frame 6 is also provided with cylindrical through grooves on the left and right sides. A sliding sleeve 61 is provided in the through groove. A sliding column 62 is slidably connected in the sliding sleeve 61. A crossbar 63 is connected between the tops of the sliding columns 62. The bottom of the sliding column 62 is connected to the connecting plate 72. The connection of the two sliding columns 62 to the connecting plate 72 can further increase the stability.

[0037] The working principle of this utility model is as follows:

[0038] This PUR hot melt adhesive scraper is based on a structure consisting of a bracket, a motor drive mechanism, and a scraper adjustment system. The bracket connects the upright plate, side plates, and upper fixed plate via welding. The motor is mounted on the upper fixed plate, and the vertical movement of the drive plate is achieved through a lead screw and drive block. The stability of the drive plate is ensured by a slide rail and slider system on the side plates. A cylinder in the scraper moving frame drives the scraper up and down, adjusting the working height. The scraper angle is adjusted by the relative angles of the connecting frame and the connector. The scraper is made of polyurethane and achieves a stable connection through serrated locking grooves and protrusions. An elastic column at the top of the scraper moving frame provides expansion space to protect the substrate, while the sliding sleeves and sliding column structures on both sides enhance overall stability.

[0039] This device has the following advantages:

[0040] It enables precise height and angle adjustment of the scraper, ensuring operational flexibility and adaptability; the polyurethane scraper is soft and does not damage the substrate, and the serrated interlocking connection provides greater connection stability; the elastic column made of hard sponge can adapt to uneven substrates and protect the material from damage; and the sliding sleeve and sliding column structure on both sides of the scraper moving frame further enhances the overall stability and durability.

[0041] The above description is only a preferred embodiment of the present utility model and is not intended to limit the present utility model. It should be noted that for those skilled in the art, several improvements and modifications can be made without departing from the technical principles of the present utility model, and these improvements and modifications should also be considered within the protection scope of the present utility model.

Claims

1. A PUR hot melt adhesive doctor blade characterized by: Including support, the motor (4) is arranged at the top of the support, the motor (4) is provided with driving mechanism moving in vertical direction, the driving mechanism is connected with driving plate (5); The side of the driving plate (5) is connected with scraper moving frame (6), the middle of the scraper moving frame (6) is provided with air cylinder (7), the air cylinder (7) is connected with connecting plate (72) through air cylinder drive rod (71), the both ends of the connecting plate (72) are provided with cylindrical connecting head (721), the connecting head (721) is connected with connecting frame (73), the bottom of the connecting frame (73) is connected with tool holder (74), the tool holder (74) is provided with recess, the recess is connected with second fixed plate (76), the second fixed plate (76) is also connected with first fixed plate (75), the second fixed plate (76) and first fixed plate (75) are connected with scraper (77).

2. The PUR hot melt adhesive doctor blade according to claim 1, characterized in that: The support includes two vertical plates (1) oppositely arranged, side plate (2) connected to the side of the two vertical plates (1), and upper fixed plate (3) vertically connected to the top of the side plate (2), and the motor (4) is mounted on the upper fixed plate (3).

3. The PUR hot melt adhesive doctor blade according to claim 2, characterized in that: The driving mechanism includes a group of shaft fixing seats (41) arranged on the side plate (2), a lead screw (42) rotatably connected in the shaft fixing seat (41), and a driving block (43) arranged on the lead screw (42), and the driving end of the motor (4) is connected with the lead screw (42), and the driving plate (5) is connected with the driving block (43).

4. The PUR hot melt adhesive doctor blade according to claim 2, characterized in that: A group of mounting blocks (21) are further arranged on the side plate (2), the mounting block (21) is provided with a sliding rail (22), the sliding rail (22) is slidably connected with a sliding block (23), and the sliding block (23) is connected with the driving plate (5).

5. The PUR hot melt adhesive doctor blade according to claim 1, characterized in that: The second fixed plate (76) and the first fixed plate (75) are oppositely arranged on one side of the second fixed plate (76) and the first fixed plate (75), and are provided with sawtooth-shaped engagement grooves, and the both sides of the scraper (77) are provided with sawtooth-shaped engagement protrusions, and the engagement protrusions are mounted in the engagement grooves.

6. The PUR hot melt adhesive doctor blade according to claim 1, characterized in that: The middle top of the scraper moving frame (6) is provided with an elastic column (64), and the top of the air cylinder (7) is connected with the elastic column (64).

7. The PUR hot melt adhesive doctor blade according to claim 1, characterized in that: The left and right sides of the scraper moving frame (6) are further provided with cylindrical through grooves, the through grooves are provided with sliding sleeves (61), the sliding sleeves (61) are slidably connected with sliding columns (62), the top of the sliding columns (62) is connected with a horizontal rod (63), and the bottom of the sliding columns (62) is connected with the connecting plate (72).

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