CN212825982U

CN212825982U - Horizontal glue scraping mechanism

Info

Publication number: CN212825982U
Application number: CN202020853933.6U
Authority: CN
Inventors: 欧阳展图
Original assignee: Guangdong Longde Chuangzhan Technology Co ltd
Current assignee: Guangdong Longde Chuangzhan Technology Co ltd
Priority date: 2020-05-20
Filing date: 2020-05-20
Publication date: 2021-03-30
Anticipated expiration: 2030-05-20

Abstract

The utility model provides a gluey mechanism is scraped to level, include: the glue scraping component is used for scraping glue on the plate; the limiting structure is used for limiting the plate when the plate is subjected to glue scraping and comprises an upper limiting plate arranged on the upper side of the plate and a lower limiting plate arranged on the lower side of the plate; and the elastic structure provides elastic pressure for the upper limiting plate and/or the lower limiting plate.

Description

Horizontal glue scraping mechanism

Technical Field

The utility model belongs to the technical field of the bag sealer technique and specifically relates to a gluey mechanism is scraped to level.

Background

The edge banding materials are pasted on the two side edges of the wooden board through glue, so that the technical problems of moisture prevention, insect prevention and the like of the board are solved, and meanwhile, the board is more attractive. However, after the edge sealing material and the plate are extruded, the unsolidified glue is extruded to the upper surface or the lower surface of the plate (or the glue overflows from the upper surface and the lower surface simultaneously), and the appearance and the product quality of the plate are seriously affected after the glue is dried. Therefore, in the prior art, the cylinder is used for driving the roller to limit and press the horizontally conveyed plate from the upper direction and the lower direction, and the scraper is used for scraping glue on the surface of the plate. However, the air cylinder is used as main power for compressing the plate, the air cylinder is unstable in air pressure after being used for a long time, the plate vibrates when passing through the glue scraping mechanism, and the plate jolts up and down, so that the edge sealing belt material is easily scratched and deformed by the scraper, and even the surface of the plate can be damaged.

Therefore, a new technical solution is provided to solve the above technical problems.

SUMMERY OF THE UTILITY MODEL

An object of the utility model is to provide a gluey mechanism is scraped to level.

The utility model discloses a technical scheme as follows:

a horizontal frictioning mechanism, wherein includes: the glue scraping component is used for scraping glue on the plate;

the limiting structure is used for limiting the plate when the plate is subjected to glue scraping and comprises an upper limiting plate arranged on the upper side of the plate and a lower limiting plate arranged on the lower side of the plate;

and the elastic structure provides elastic pressure for the upper limiting plate and/or the lower limiting plate.

The level scrape gluey mechanism, wherein, the frictioning subassembly is including leveling the mechanism of scraping, it includes first mount pad and first scraper structure to level the mechanism of scraping, it installs to go up the limiting plate first scraper is structural, first scraper structure passes through elastic construction installs on the first mount pad.

The horizontal glue scraping mechanism comprises a lower leveling scraping mechanism, the lower leveling scraping mechanism comprises a second mounting seat and a second scraper structure, the lower limiting plate is mounted on the second scraper structure, and the second scraper structure is mounted on the second mounting seat through the elastic structure; when a plate is horizontally conveyed between the upper limiting plate and the lower limiting plate, the first scraper structure and the second scraper structure scrape the glue on the upper surface and the lower surface of the plate respectively.

The horizontal glue scraping mechanism is characterized in that a first fixing plate is connected to the first mounting seat, and a second fixing plate is connected to the second mounting seat.

The horizontal glue scraping mechanism is characterized in that a first transmission structure is connected to the first mounting seat and is connected with the first scraper structure, and the first transmission structure is used for driving the first scraper structure to move in the vertical direction; the second installation seat is connected with a second transmission structure, the second transmission structure is connected with the second scraper structure, and the second transmission structure is used for driving the second scraper structure to move in the vertical direction.

The horizontal glue scraping mechanism is characterized in that a first horizontal adjusting structure is mounted on the first fixing plate, and the first mounting seat is connected with the first horizontal adjusting structure; the second fixing plate is provided with a second horizontal adjusting structure, the second mounting seat is connected with the second horizontal adjusting structure, and the first horizontal adjusting structure and the second horizontal adjusting structure are respectively used for driving the first mounting seat and the second mounting seat to move in the horizontal direction.

The horizontal glue scraping mechanism is characterized in that a counting device is arranged on each of the first horizontal adjusting structure and the second horizontal adjusting structure and used for recording the moving distance of the first mounting seat and the second mounting seat in the horizontal direction.

The horizontal glue scraping mechanism comprises a first scraper structure, a second scraper structure and a third mounting seat, wherein the first scraper structure and the second scraper structure respectively comprise a third mounting seat, a knife handle and a scraper, the knife handle is mounted on the third mounting seat, and an upper limiting plate and a lower limiting plate are mounted on the third mounting seat.

The horizontal glue scraping mechanism is characterized in that a connecting portion is arranged at the tail of the cutter handle and provided with an external thread, a threaded hole is formed in the third mounting seat, the threaded hole penetrates through the surface of the third mounting seat and is perpendicular to the horizontal ground, and the connecting portion is in threaded connection with the threaded hole.

The horizontal glue scraping mechanism is characterized in that a blowing port is formed in the third mounting seat.

The utility model discloses beneficial effect: the utility model provides a glue scraping mechanism horizontally uses elastic construction to provide the packing force that compresses tightly panel for upper and lower limiting plate, can be used to limit the motion range on the vertical direction of panel, still can provide the benchmark for the panel specification (thickness) of carrying and refer to, keeps not changing at long-time during operation glue scraping mechanism self structure, improves the stability of panel when glue scraping mechanism, guarantees frictioning efficiency and product quality.

Drawings

Fig. 1 is a schematic perspective view of the present invention.

Fig. 2 is a side view of the present invention.

Fig. 3 is a front view of the present invention.

Fig. 4 is a schematic diagram of the local enlarged structure of the present invention.

Reference numbers in the figures: 1. a first fixing plate; 2. a first mounting seat; 3. a second mounting seat; 4. an upper limiting plate; 5. a lower limiting plate; 6. a third mounting seat; 7. a knife handle; 8. a scraper; 9. a first horizontal guide rail; 10. a first adjusting screw; 11. a first connecting plate; 12. a second horizontal guide rail; 13. a second adjusting screw; 14. a second connecting plate; 15. a counter; 16. a third adjusting screw; 17. a third connecting plate; 18. a first vertical guide rail; 19. a first spring; 20. a first adjusting nut; 21. a bell mouth; 22. a fourth adjusting screw; 23. a fourth connecting plate; 24. a second vertical guide rail; 25. a second spring; 26. a second adjusting nut; 27. a first cylinder; 28. a second cylinder; 29. a connecting portion; 30. an air blowing port; 31. a second fixing plate; 100. a plate material.

Detailed Description

Reference will now be made in detail to embodiments of the present invention, examples of which are illustrated in the accompanying drawings, wherein like reference numerals refer to the same or similar elements or elements having the same or similar function throughout. The embodiments described below with reference to the accompanying drawings are exemplary only for the purpose of explaining the present invention, and should not be construed as limiting the present invention.

In the description of the present invention, it is to be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise" and the like indicate orientations or positional relationships based on the orientations or positional relationships shown in the drawings, and are only for convenience of description and to simplify the description, but do not indicate or imply that the device or element referred to must have a particular orientation, be constructed and operated in a particular orientation, and therefore should not be construed as limiting the present invention. Furthermore, the terms "first", "second" and "first" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Thus, features defined as "first", "second", may explicitly or implicitly include one or more of the described features. In the description of the present invention, "a plurality" means two or more unless specifically limited otherwise.

In the description of the present invention, it is to be noted that, unless otherwise explicitly specified or limited, the terms "mounted," "connected," and "connected" are to be construed broadly, and may be, for example, fixedly connected, detachably connected, or integrally connected; may be mechanically connected, may be electrically connected or may be in communication with each other; either directly or indirectly through intervening media, either internally or in any other relationship. The specific meaning of the above terms in the present invention can be understood according to specific situations by those skilled in the art.

In the present disclosure, unless expressly stated or limited otherwise, the first feature "on" or "under" the second feature may comprise direct contact between the first and second features, or may comprise contact between the first and second features not directly. Also, the first feature being "on," "above" and "over" the second feature includes the first feature being directly on and obliquely above the second feature, or merely indicating that the first feature is at a higher level than the second feature. A first feature being "under," "below," and "beneath" a second feature includes the first feature being directly under and obliquely below the second feature, or simply meaning that the first feature is at a lesser elevation than the second feature.

The following disclosure provides many different embodiments or examples for implementing different features of the invention. In order to simplify the disclosure of the present invention, the components and arrangements of specific examples are described below. Of course, they are merely examples and are not intended to limit the present invention. Furthermore, the present invention may repeat reference numerals and/or reference letters in the various examples, which have been repeated for purposes of simplicity and clarity and do not in themselves dictate a relationship between the various embodiments and/or arrangements discussed. In addition, the present disclosure provides examples of various specific processes and materials, but one of ordinary skill in the art may recognize applications of other processes and/or use of other materials.

In order to solve the above technical problem, as shown in fig. 1 to 3, the utility model provides a horizontal frictioning mechanism, include: the glue scraping component is used for scraping glue on the plate; the limiting structure is used for limiting the plate when the plate is subjected to glue scraping and comprises an upper limiting plate 4 arranged on the upper side of the plate and a lower limiting plate 5 arranged on the lower side of the plate; and an elastic structure for providing elastic pressure to the upper and/or lower confining

plates

4 and 5.

In this embodiment, the upper leveling mechanism includes a first mounting seat 2 and a first scraper structure, the upper limiting plate 4 is mounted on the first scraper structure, and the first scraper structure is mounted on the first mounting seat 2 through an elastic structure. In practical applications, the upper limiting plate 4 is disposed opposite to the lower limiting plate 5. The first scraper structure scrapes the surface of the plate material when the plate material is horizontally conveyed between the upper and lower limiting

plates

4 and 5.

In practical application, the glue scraping assembly in this embodiment may be installed on a frame (not shown) of an edge bonding machine for use, further, the first installation base 2 is connected with the first fixing plate 1, the first fixing plate 1 is connected with a frame screw of the edge bonding machine, and the lower limiting plate 5 may be directly connected with the frame of the edge bonding machine through a screw. In practical application, after the upper surface of the plate is subjected to glue scraping, the plate can be placed on the edge sealing machine again for transmission, so that the upper leveling and scraping mechanism scrapes the lower surface of the plate. It is worth noting that last limiting plate 4 can set up limiting plate 5 top down, also can set up limiting plate 5 below down, promptly, when the last horizontal arrangement formula of panel transportation line set up a plurality of on flat scraping mechanism to form the multistation processing mode, still can make two adjacent on flat scraping mechanism be dislocation formula setting from top to bottom, promptly, the last flat scraping mechanism on upper portion carries out the frictioning to the panel upper surface, the last flat scraping mechanism flip-chip of below is used for carrying out the frictioning to the panel lower surface.

In practical application, when panel was carried by bag sealer conveyor horizontal transport, panel part surface was in unsettled state, when carrying out the frictioning to this panel unsettled part's surface and handling, for preventing panel from appearing vibrating when scraping gluey mechanism, the panel jolts from top to bottom, leads to the panel surface by the scraper scratch, the phenomenon of deformation takes place, consequently when in-service use, when panel was carried by the level and is gone up between spacing board 4 and the lower spacing board 5, the scraper structure could carry out the frictioning to the panel surface. The purpose of spacing board 4 and spacing board 5 down on setting up can be used to the ascending range of motion of the vertical direction of restriction panel, still can provide the benchmark for the panel specification (thickness) of carrying and refer to, improves the stability of panel when scraping gluey mechanism, guarantees frictioning efficiency and product quality. If jolt or shake about panel appears, when it through last limiting plate 4 and limiting plate 5 down, use elastic construction can make last limiting plate 4 provide permanent unchangeable effort (because of the mounted position is different, this effort can be for decurrent or ascending pressure) for the panel surface, make the self structure and the operating condition of scraping gluey mechanism not receive external factor influence and change when long-time work to guarantee product quality. For example, when a cylinder is used for driving a cutter, the cylinder can be deflated due to long-term use.

Further, in order to achieve simultaneous glue scraping treatment of the upper surface and the lower surface of the plate at the same station, in this embodiment, the lower leveling mechanism includes a second mounting seat 3 and a second scraper structure, the lower limiting plate 5 is mounted on the second scraper structure, and the second scraper structure is mounted on the second mounting seat 3 through an elastic structure; when the sheet material 100 is horizontally conveyed between the upper and lower limiting

plates

4 and 5, the first and second scraper structures scrape the upper and lower surfaces of the sheet material 100, respectively, as shown in fig. 2. In order to mount the lower flat scraping mechanism on the frame of the edge bonding machine, a second fixing plate 31 is connected to the second mounting base 3, and the second fixing plate 31 is connected with the frame through screws.

In practical application, the upper limiting plate 4 is arranged on one side of the scraper 8 in the first scraper structure, and the lower limiting plate 5 is arranged on one side of the scraper 8 in the second scraper structure, and it is noted that the bottom of the upper limiting plate 4 should be flush with the knife tip of the scraper 8, the top of the lower limiting plate 5 is flush with the knife tip of the scraper 8, the two ends of the bottom edge of the upper limiting plate 4 incline upwards, and the two ends of the top edge of the lower limiting plate 5 incline downwards, so as to form a bell mouth 21 shape for guiding the plate 100 to enter the gap between the two limiting plates. Further, in order to reduce the occurrence of the scratching phenomenon on the surface of the plate material 100 by the scraper 8, the contact area between the blade point of the scraper 8 and the surface of the plate material 100 can be reduced, so that the blade point can be slightly inclined, but the blade point can be ensured to scrape the colloid on the surface of the plate material 100. In actual use, the sheet material 100 is horizontally conveyed, and the sheet material 100 passes through the gap between the upper limiting plate 4 and the lower limiting plate 5, so that the scraper 8 scrapes off the colloid protruding from the surface of the sheet material 100.

Further, the first scraper structure and the second scraper structure both comprise a third mounting seat 6, a handle 7 and a scraper 8, the handle 7 is mounted on the third mounting seat 6, and the upper limiting plate 4 and the lower limiting plate 5 are mounted on the third mounting seat 6.

In practical use, because the specifications of the boards 100 are different, if the position of the scraper 8 is not changed, the glue scraping work cannot be performed, and the structural functionality is greatly limited, in this embodiment, a first horizontal adjustment structure is installed on the first fixing plate 1, and the first installation base 2 is connected with the first horizontal adjustment structure; a second horizontal adjusting structure is installed on the second fixing plate 31, the second mounting base 3 is connected with the second horizontal adjusting structure, and the first horizontal adjusting structure and the second horizontal adjusting structure are respectively used for driving the first mounting base 2 and the second mounting base 3 to move in the horizontal direction. And thus can be used to adjust the position of the blade (doctor blade 8) horizontally, for example, by adjusting the doctor blade 8 forward (out in the paper plane direction) or by adjusting the doctor blade 8 backward (in the paper plane direction).

Specifically, the first horizontal adjusting structure includes a first horizontal guide rail 9 and a first adjusting screw 10, one end of the first horizontal guide rail 9 passes through the first mounting seat 2 and then is connected to the fixing plate 1, the other end of the first horizontal guide rail 9 is provided with a first connecting plate 11, the first horizontal guide rail 9 is vertically installed on the first fixing plate 1, one end of the first adjusting screw 10 passes through the first connecting plate 11 and then is in threaded connection with the first mounting seat 2, and the first adjusting screw 10 is parallel to the first horizontal guide rail 9. Similarly, the second horizontal adjusting structure includes a second horizontal guide rail 12 and a second adjusting screw 13, one end of the second horizontal guide rail 12 passes through the second mounting seat 3 and then is connected to the second fixing plate 31, the other end of the second horizontal guide rail 12 is provided with a second connecting plate 14, the second horizontal guide rail 12 is vertically installed on the second fixing plate 31, one end of the second adjusting screw 13 passes through the second connecting plate 14 and then is in threaded connection with the second mounting seat 3, and the second adjusting screw 13 is parallel to the second horizontal guide rail 12. The using method comprises the following steps: an operator twists the other end of the adjusting screw, and under the action of threaded connection transmission, the first mounting base 2 (the second mounting base 3) horizontally moves on the first horizontal guide rail 9 (the second horizontal guide rail 12), so that the scraper structure is driven to horizontally move. In practical application, the first horizontal guide rail 9 and the second horizontal guide rail 12 are both two guide rails parallel to each other.

In order to facilitate the operator to precisely adjust the distance the scraper 8 moves, in a further embodiment, counting means are provided on both the first and second leveling structures for recording the distance the first and second mounting blocks 2, 3 move in the horizontal direction. The counting device is a counter 15 (mechanical and manual counter), the adjusting screw passes through the counter 15, when the operator screws the adjusting screw, the number of turns or the rotating angle of the adjusting screw is displayed on the number plate on the counter 15, so as to calculate the horizontal moving distance of the structure. The connection mode of the counter 15 and the adjusting screw is the prior art, and is not described in detail herein.

In practical application, the elastic structure includes a first elastic unit and a second elastic unit, specifically, the first elastic unit includes a third adjusting screw 16, a third connecting plate 17, a first vertical guide rail 18 and a first spring 19, one end of the third adjusting screw 16 is installed on the first mounting base 2, the third adjusting screw 16 is perpendicular to the horizontal ground, the third connecting plate 17 is sleeved on the third adjusting screw 16, the first spring 19 is sleeved on the third adjusting screw 16, one end of the first spring 19 abuts against the third connecting plate 17, the third adjusting screw 16 is installed with a first adjusting nut 20, and the other end of the first spring 19 abuts against the first adjusting nut 20; one end of the first vertical guide rail 18 is connected with the third connecting plate 17, and the other end of the first vertical guide rail 18 penetrates through the first mounting seat 2 to be connected with the first scraper structure; the second elastic unit comprises a fourth adjusting screw 22, a fourth connecting plate 23, a second vertical guide rail 24 and a second spring 25, one end of the fourth adjusting screw 22 is mounted on the second mounting seat 3, the fourth adjusting screw 22 is perpendicular to the horizontal ground, the fourth connecting plate 23 is sleeved on the fourth adjusting screw 22, the second spring 25 is sleeved on the fourth adjusting screw 22, one end of the second spring 25 abuts against the fourth connecting plate 23, the fourth adjusting screw 22 is provided with a second adjusting nut 26, and the other end of the second spring 25 abuts against the second adjusting nut 26; one end of the second vertical guide rail 24 is connected to the fourth connecting plate 23, and the other end of the second vertical guide rail 24 passes through the second mounting seat 3 and is connected to the second scraper structure. During the in-service use, because the horizontal position of first, two mount pads is fixed, when panel was between 4 and lower limiting plate 5 of spacing board on the process, can jack-up two limiting plates, and the spring other end receives adjusting nut spacing and rigidity, then can exert the effort of direction to two limiting plates, the conduction direction of power is in proper order: the spring, the connecting plate, the vertical guide rail, the third mounting seat 6 and the limiting plates on the third mounting seat 6, so that the two limiting plates move downwards under the action of the spring to be used for pressing and tightly adhering the plates.

In practical use, when no plate passes through, the scraper 8 can be retracted firstly, that is, the upper and lower scrapers move in a direction away from each other, so that in this embodiment, the first mounting seat 2 is connected with a first transmission structure, the first transmission structure is connected with the first scraper structure, and the first transmission structure is used for driving the first scraper structure to move in a vertical direction; the second mounting seat 3 is connected with a second transmission structure, the second transmission structure is connected with the second scraper structure, and the second transmission structure is used for driving the second scraper structure to move in the vertical direction.

In practical application, the first transmission structure is a first cylinder 27, the second transmission structure is a second cylinder 28, a cylinder barrel of the first cylinder 27 is fixedly connected to the third connecting plate 17, a cylinder barrel of the second cylinder 28 is fixedly connected to the fourth connecting plate 23, and shaft holes (not shown in the figure) are arranged on the surfaces of the first mounting seat 2 and the second mounting seat 3. In the using method, a piston shaft (not shown in the figure) of the first air cylinder 27 extends downwards towards the shaft hole on the first mounting seat 2, so that the third connecting plate 17 is jacked up (the direction is upward), and the third connecting plate 17 drives the vertical guide rail and the first scraper structure to move upwards to realize cutter withdrawal. Similarly, a piston shaft (not shown in the figure) of the second cylinder 28 extends upward toward the shaft hole on the second mounting seat 3, so that the fourth connecting plate 23 is jacked up (the direction is downward), and the fourth connecting plate 23 drives the vertical guide rail and the second scraper structure to move downward to realize the cutter retracting.

In order to further adjust the position of the blade in the vertical direction, that is, relative to the surface height of the plate, the tail of the tool holder 7 is provided with a connecting portion 29, the connecting portion 29 is provided with an external thread (not shown in the figure), the third mounting seat 6 is provided with a threaded hole (not shown in the figure), the threaded hole penetrates through the surface of the third mounting seat 6 and is perpendicular to the horizontal ground, and the connecting portion 29 is in threaded connection with the threaded hole. The scraper 8 is arranged at the head part of the cutter handle 7, and the connecting part 29 is screwed to adjust the height of the scraper 8 up and down.

In order to clean the waste glue on the surface of the plate while scraping the glue, the third mounting seat 6 is provided with a gas blowing port 30 (as shown in fig. 4) for connecting an external gas pipe (not shown in the figure), an air pump (not shown in the figure) and the like, and the gas blowing port 30 is used for blowing gas to blow away the waste on the surface of the plate.

In summary, although the present invention has been described with reference to the preferred embodiments, the above-described preferred embodiments are not intended to limit the present invention, and those skilled in the art can make various changes and modifications without departing from the spirit and scope of the present invention, so that the scope of the present invention shall be determined by the scope of the appended claims.

Claims

1. The utility model provides a horizontal frictioning mechanism which characterized in that includes: the glue scraping component is used for scraping glue on the plate;

2. The horizontal frictioning mechanism of claim 1, wherein the frictioning assembly includes an upper flat frictioning mechanism including a first mounting base and a first scraper structure, the upper limiting plate being mounted on the first scraper structure, the first scraper structure being mounted on the first mounting base by the resilient structure.

3. The horizontal frictioning mechanism of claim 2, wherein the frictioning assembly includes a lower flat frictioning mechanism including a second mounting base and a second scraper structure, the lower limiting plate being mounted on the second scraper structure, the second scraper structure being mounted on the second mounting base by the resilient structure; when a plate is horizontally conveyed between the upper limiting plate and the lower limiting plate, the first scraper structure and the second scraper structure scrape the glue on the upper surface and the lower surface of the plate respectively.

4. The horizontal glue scraping mechanism of claim 3, wherein a first fixing plate is connected to the first mounting base, and a second fixing plate is connected to the second mounting base.

5. The horizontal glue scraping mechanism according to claim 4, wherein a first transmission structure is connected to the first mounting seat, and the first transmission structure is connected to the first scraper structure and is used for driving the first scraper structure to move in a vertical direction; the second installation seat is connected with a second transmission structure, the second transmission structure is connected with the second scraper structure, and the second transmission structure is used for driving the second scraper structure to move in the vertical direction.

6. The horizontal glue scraping mechanism of claim 5, wherein a first horizontal adjustment structure is mounted on the first fixing plate, and the first mounting base is connected with the first horizontal adjustment structure; the second fixing plate is provided with a second horizontal adjusting structure, the second mounting seat is connected with the second horizontal adjusting structure, and the first horizontal adjusting structure and the second horizontal adjusting structure are respectively used for driving the first mounting seat and the second mounting seat to move in the horizontal direction.

7. The horizontal glue scraping mechanism of claim 6, wherein a counting device is arranged on each of the first horizontal adjusting structure and the second horizontal adjusting structure, and the counting device is used for recording the moving distance of the first mounting seat and the second mounting seat in the horizontal direction.

8. The horizontal frictioning mechanism of claim 7, wherein the first and second scraper structures each include a third mount, a handle, and a scraper, the handle being mounted on the third mount, the upper and lower limiting plates being mounted on the third mount.

9. The horizontal glue scraping mechanism according to claim 8, characterized in that a connecting portion is arranged at the tail of the cutter handle, an external thread is arranged on the connecting portion, a threaded hole is arranged on the third mounting seat, the threaded hole penetrates through the surface of the third mounting seat and is perpendicular to the horizontal ground, and the connecting portion is in threaded connection with the threaded hole.

10. The horizontal glue scraping mechanism of claim 8, wherein a blowing port is provided on the third mounting seat.