Closed scraper constant distance adjusting device

Abstract

The invention belongs to the technical field of printing and coating equipment, and particularly relates to a closed type scraper constant-distance adjusting device which comprises a coating roller assembly, a scraper assembly and a constant-distance adjusting assembly. The scraper assembly comprises two scrapers in contact with the coating anilox roller; the supporting assembly comprises a bottom plate; the two driving assemblies are symmetrically arranged on the bottom plate, and each driving assembly comprises an air cylinder; the telescopic ends of the two air cylinders are connected with the scraper assembly. The main control module is electrically connected with the two air cylinders; the main control module of the closed type scraper constant distance adjusting device controls the air cylinder to stretch out, the air cylinder drives the scraper assembly to move so that the scraper can make contact with the coating anilox roller, the scraper can be abraded gradually, the distance between the scraper and the coating anilox roller can be increased gradually, and the main control module automatically generates the compensation distance of the air cylinder and controls the air cylinder to stretch out according to multi-direction feedback data. Therefore, real-time automatic compensation after the scraper is abraded is achieved, and the constant distance state between the scraper and the coating anilox roller is maintained.

Description

Technical Field

[0001] The invention belongs to the technical field of printing and coating equipment, and particularly relates to a closed scraper constant distance adjustment device. Background Art

[0002] In the printing and coating industry, closed scraper systems are widely used to control coating thickness and uniformity. With the development of high-speed coating technology, the requirements for coating accuracy are getting higher and higher. At present, the industry generally adopts the combination of anilox roller and scraper blade to achieve coating. The wear problem of scraper blade has become a key factor affecting coating quality.

[0003] The existing technology primarily uses manual adjustment of the gap between the doctor blade and the anilox roller. The doctor blade's position is adjusted by rotating a screw, and a pneumatic cylinder is used to hold the doctor blade against the coating anilox roller. While this adjustment method meets initial coating requirements, the doctor blade's position remains fixed, preventing automatic compensation for blade wear. Furthermore, this method requires frequent manual intervention, making it difficult to maintain a constant doctor blade gap during continuous production.

[0004] Therefore, in order to solve the above problems, it is necessary to design a closed scraper constant distance adjustment device. Summary of the Invention

[0005] The purpose of the present invention is to provide a closed scraper constant distance adjustment device to solve the technical problems mentioned in the background technology.

[0006] In order to solve the above technical problems, the present invention provides a closed scraper constant distance adjustment device, comprising: A coating roller assembly comprising: a coating anilox roller; A doctor blade assembly comprising: two doctor blades in contact with the coating anilox roller; A support assembly comprising: a base plate; Two drive assemblies are symmetrically arranged on the bottom plate, each drive assembly includes: a cylinder; The telescopic ends of the two cylinders are connected to the scraper assembly; The main control module is electrically connected to the two cylinders; The main control module is suitable for judging the degree of scraper wear according to the working time and controlling the extension and contraction length of the cylinder to make the scraper contact with the coating anilox roller.

[0007] Furthermore, the support assembly further comprises: a first support plate provided on both ends of the bottom plate and a second support plate provided on both ends of the bottom plate; The two cylinders are fixed on the corresponding second support plates; The driving assembly further comprises: two guide rails arranged on the first support plate, a slider slidably connected to the guide rails, and a topless box connected to the two sliders; The telescopic end of the cylinder is connected to the topless box; and The two topless boxes are connected to the scraper assembly; The cylinder is suitable for driving the topless box to move during expansion and contraction, the topless box drives the slider to slide on the guide rail, and the topless box drives the scraper assembly to move so that the scraper contacts the coating anilox roller.

[0008] Furthermore, the support assembly further comprises: a limit block arranged on the inner side of the first support plate; The limit block is located in the topless box; The driving assembly further comprises: a support seat arranged outside the topless box, a reducer arranged outside the support seat, a servo motor connected to the reducer, a threaded sleeve embedded in the side of the topless box, a screw rod threadedly connected to the threaded sleeve, and a coupling arranged in the support seat; wherein Both ends of the coupling are connected to the reducer and the screw rod; The other end of the screw rod abuts against the limit block; The main control module is electrically connected to the servo motor; and The servo motor is suitable for driving the screw rod to rotate through the reducer and the coupling, and the screw rod is engaged with the threaded sleeve so that the screw rod moves back and forth and abuts against the screw rod.

[0009] Furthermore, the coating roller assembly further comprises: bearing seats sleeved on both ends of the coating anilox roller; The bearing seat is connected to the coating anilox roller bearing; and The bearing seat is suitable for being fixed on the machine base so as to install the coating anilox roller to a working position.

[0010] Furthermore, the scraper assembly further comprises: a blade holder arranged on one side of the coating anilox roller and pressure plates arranged on the upper and lower sides of the blade holder; The two scrapers are respectively fixed on corresponding pressing plates; and The scraper and the blade holder form a scraper cavity when they come into contact with the coating anilox roller.

[0011] Furthermore, the scraper assembly further comprises: a fixing seat provided at both ends of the blade holder; The driving assembly further includes: a connecting piece connected to the topless box; The other side of the connecting piece is connected to the fixing seat.

[0012] Furthermore, the scraper assembly further includes: a reinforcement member arranged on the blade holder.

[0013] The beneficial effects of the present invention are: (1) The main control module of the present invention controls the extension of the cylinder, and the cylinder drives the scraper assembly to move so that the scraper contacts the coating anilox roller. During the formal coating process, the coating anilox roller rotates continuously, and the friction between its surface and the scraper causes the scraper to gradually wear out, and the distance between the scraper and the coating anilox roller gradually increases. The main control module automatically generates the compensation distance of the cylinder based on multiple feedback data such as working time, visual data and coating thickness, and controls the extension of the cylinder, thereby achieving real-time automatic compensation after the scraper wears out and maintaining a constant distance between the scraper and the coating anilox roller.

[0014] (2) In the initial state of the present invention, the main control module controls the telescopic end of the cylinder to continuously extend, pushing the topless box to move, and the topless box slides on the guide rail through the slider to drive the scraper assembly to move toward the coating anilox roller until the scraper contacts the surface of the coating anilox roller to complete the initial positioning; at the same time, the servo motor drives the screw to rotate through the reducer and the coupling, so that the screw and the limit block are offset to avoid excessive contact between the scraper on the scraper assembly and the coating anilox roller under the action of the cylinder; during the coating and compensation adjustment process, the coating anilox roller rotates continuously, and the friction between its surface and the scraper causes the scraper to gradually wear, and the distance between the scraper and the coating anilox roller gradually increases. The main control module is fed back in real time based on multiple feedback data such as working time, visual data and coating thickness. According to the data, the rotation data of the servo motor is automatically generated, and the rotation of the servo motor is controlled. The servo motor drives the screw to rotate through the reducer and the coupling. The screw is threadedly connected to the threaded sleeve on the topless box to retract the screw. The retraction distance is consistent with the calculated wear amount. At the same time, the cylinder continues to push the topless box to move, and the topless box drives the scraper assembly to move, so that the scraper still maintains a constant distance from the coating anilox roller after wear. During this process, the cylinder continues to provide stable thrust to ensure that the scraper and the coating anilox roller always maintain a preset distance. The limit block limits the maximum movement by offsetting the screw to avoid over-adjustment. Through the above description, real-time automatic compensation after scraper wear is achieved, and a constant distance state between the scraper and the coating anilox roller is maintained.

[0015] Other features and advantages of the present invention will be described in the following description, and in part will become apparent from the description, or understood by practicing the present invention. The purpose and other advantages of the present invention are realized and obtained by the structures particularly pointed out in the description and the drawings.

[0016] In order to make the above-mentioned objects, features and advantages of the present invention more obvious and easy to understand, preferred embodiments are given below and described in detail with reference to the accompanying drawings. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] In order to more clearly illustrate the specific embodiments of the present invention or the technical solutions in the prior art, the following briefly introduces the drawings required for use in the specific embodiments or the description of the prior art. Obviously, the drawings described below are some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying any creative work.

[0018] Figure 1 is an exploded view of a preferred embodiment of the present invention as a whole; Figure 2 yes Figure 1 Enlarged view of area A in the middle; Figure 3 It is a three-dimensional diagram of a preferred embodiment of the present invention. Figure 1 ; Figure 4 yes Figure 3 Enlarged view of area B in the middle; Figure 5 is a partial exploded view of a preferred embodiment of a scraper assembly of the present invention; Figure 6 It is a three-dimensional diagram of a preferred embodiment of the present invention. Figure 2 .

[0019] In the picture: Coating roller assembly 1, coating anilox roller 101, bearing seat 102; Scraper assembly 2, scraper 201, blade holder 202, pressure plate 203, sealing baffle 204, fixing seat 205, reinforcement member 206; Support assembly 3, bottom plate 301, first support plate 302, second support plate 303, limit block 304; Driving assembly 4, cylinder 401, guide rail 402, slider 403, top box 404, support base 405, reducer 406, servo motor 407, threaded sleeve 408, screw rod 409, coupling 410, connecting piece 411. DETAILED DESCRIPTION

[0020] To make the objectives, technical solutions, and advantages of the embodiments of the present invention more clear, the technical solutions of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the embodiments described are only part of the embodiments of the present invention, not all of them. All other embodiments obtained by ordinary technicians in this field based on the embodiments of the present invention without making any creative efforts shall fall within the scope of protection of the present invention. Example 1

[0021] like Figures 1 to 6 As shown, this embodiment provides a closed scraper constant distance adjustment device, comprising: The coating roller assembly 1 comprises: a coating anilox roller 101; a scraper assembly 2 comprising: two scrapers 201 in contact with the coating anilox roller 101; a support assembly 3 comprising: a base plate 301; two drive assemblies 4 symmetrically arranged on the base plate 301, each drive assembly 4 comprising: a cylinder 401; wherein the telescopic ends of the two cylinders 401 are connected to the scraper assembly 2; a main control module electrically connected to the two cylinders 401; wherein the main control module is suitable for judging the degree of wear of the scraper 201 according to the working time, and controlling the telescopic length of the cylinder 401 degree so that the scraper 201 contacts the coating anilox roller 101; the function of the scraper 201 is to contact the coating anilox roller 101 to scrape off excess coating on the surface of the coating anilox roller 101 to control the coating thickness; the main control module adopts but is not limited to PLC control; in addition to judging the wear of the scraper 20 according to the working time, the main control module can also monitor the spacing data, coating thickness and other feedback data of the scraper 201 and the coating anilox roller 101 in real time according to the visual component, automatically generate the compensation distance of the cylinder 401, and control the extension of the cylinder 401.

[0022] In this embodiment, the main control module controls the extension of the cylinder 401, and the cylinder 401 drives the scraper assembly 2 to move so that the scraper 201 contacts the coating anilox roller 101. During the formal coating process, the coating anilox roller 1 continues to rotate, and the friction between its surface and the scraper 201 causes the scraper 201 to gradually wear, and the distance between the scraper 201 and the coating anilox roller 1 gradually increases. The main control module automatically generates the compensation distance of the cylinder 401 based on multiple feedback data such as working time, visual data and coating thickness, and controls the extension of the cylinder 401, thereby achieving real-time automatic compensation after the scraper 201 is worn, and maintaining a constant distance between the scraper 201 and the coating anilox roller 101.

[0023] The support assembly 3 also includes: a first support plate 302 arranged at both ends of the base plate 301 and a second support plate 303 arranged at both ends of the base plate 301; wherein the two cylinders 401 are fixed on the corresponding second support plates 303; the driving assembly 4 also includes: two guide rails 402 arranged on the first support plate 302, a slider 403 slidably connected to the guide rails 402 and a topless box 404 connected to the two sliders 403; wherein the telescopic end of the cylinder 401 is connected to the topless box 404; and the two topless boxes 404 are connected to the scraper assembly 2; the cylinder 401 is suitable for driving the topless box 404 to move when telescoping, the topless box 404 drives the slider 403 to slide on the guide rail 402, and the topless box 404 drives the scraper assembly 2 to move so that the scraper 201 contacts the coating anilox roller 101; wherein by providing the guide rails 402 and the slider 403, the moving trajectory of the topless box 404 and the scraper assembly 2 is ensured, and the adjustment accuracy is improved.

[0024] The support assembly 3 also includes: a limit block 304 arranged on the inner side of the first support plate 302; wherein the limit block 304 is located in the topless box 404; the drive assembly 4 also includes: a support seat 405 arranged on the outside of the topless box 404, a reducer 406 arranged on the outside of the support seat 405, a servo motor 407 connected to the reducer 406, a threaded sleeve 408 embedded in the side of the topless box 404, a screw rod 409 threadedly connected to the threaded sleeve 408 and a coupling 410 arranged in the support seat 405; wherein both ends of the coupling 410 are connected to the reducer 406 and the screw rod 409; the screw The other end of the rod 409 is against the limit block 304; the main control module is electrically connected to the servo motor 407; and the servo motor 407 is suitable for driving the screw rod 409 to rotate through the reducer 406 and the coupling 410, and the screw rod 409 is engaged with the threaded sleeve 408 to make the screw rod 409 move back and forth and against the screw rod 409; wherein the limit block 304 is used to limit the scraper assembly 2 to prevent the scraper 201 from excessively contacting the coating anilox roller 101 under the action of the cylinder 401, affecting the coating thickness while also increasing the wear of the scraper 201; wherein by setting the reducer 406 and the servo motor 407, the servo motor 407 provides precise rotational power, and the reducer 406 reduces the speed and increases the torque, thereby achieving precise rotation control of the screw 409, which is the core power component for accurately adjusting the position of the scraper 201; wherein the coupling 410 adopts a telescopic coupling as the most preferred; wherein the telescopic coupling adopts but is not limited to a plum blossom coupling; wherein the use of the telescopic coupling is to have a certain distance compensation, when the servo motor 407 drives the screw 409 to rotate through the reducer 406, it does not affect the small distance movement of the screw 409 on the threaded sleeve 408, so as to normally compensate for the wear of the scraper 201 (for example: when the coupling When 410 is at the longest distance, the length of the screw rod 409 in the topless box 404 is the longest, the screw rod 409 is offset against the limit block 304, the moving distance of the topless box 404 is the shortest, and the compensation of the scraper assembly 2 is small. When the scraper 201 is worn, the servo motor 407 drives the screw rod 409 to rotate through the reducer 406 and the coupling 410. The screw rod 409 is threadedly connected to the threaded sleeve 408, and the screw rod 409 slowly becomes shorter in the topless box 404. The coupling 410 gradually becomes shorter. At this time, the moving distance of the topless box 404 gradually becomes longer, and the compensation of the scraper assembly 2 gradually becomes larger, so that the scraper 201 still maintains a constant distance after wear).

[0025] In this embodiment, in the initial state, the main control module controls the telescopic end of the cylinder 401 to continuously extend, pushing the topless box 404 to move. The topless box 404 slides on the guide rail 402 via the slider 403, thereby driving the scraper assembly 2 to move toward the coating anilox roller 101 until the scraper 201 contacts the surface of the coating anilox roller 101, completing the initial positioning. At the same time, the servo motor 407 drives the screw rod 409 to rotate through the reducer 406 and the coupling 410, so that the screw rod 409 abuts against the limit block 304, thereby preventing the scraper 201 on the scraper assembly 2 from excessively contacting the coating anilox roller 101 under the action of the cylinder 401. During the coating and compensation adjustment process, the coating anilox roller 101 rotates continuously, and the friction between its surface and the scraper 201 causes the scraper 201 to gradually wear, and the distance between the scraper 201 and the coating anilox roller 101 gradually increases. The main control module automatically generates the rotation data of the servo motor 407 according to the multi-party feedback data such as the working time, visual data and coating thickness in real time, and controls the rotation of the servo motor 407. The servo motor 407 drives the screw rod 409 to rotate through the reducer 406 and the coupling 410. The screw rod 409 is threadedly connected to the threaded sleeve 408 on the topless box 404 to retract the screw rod 409. The retraction distance is 0. The distance is consistent with the calculated wear amount, and at the same time, the cylinder 401 continues to push the topless box 404 to move, and the topless box 404 drives the scraper assembly 2 to move, so that the scraper 201 still maintains a constant distance from the coating anilox roller 101 after wear. During this process, the cylinder 401 continues to provide stable thrust to ensure that the scraper 201 and the coating anilox roller 101 always maintain a preset distance. The limit block 304 limits the maximum movement by offsetting with the screw 409 to avoid over-adjustment. Through the above description, real-time automatic compensation for the scraper 201 after wear is achieved, and the constant distance between the scraper 201 and the coating anilox roller 101 is maintained.

[0026] The coating roller assembly 1 also includes: a bearing seat 102 sleeved on both ends of the coating anilox roller 101; wherein the bearing seat 102 is connected to the bearing of the coating anilox roller 101; and the bearing seat 102 is suitable for being fixed on the machine base to install the coating anilox roller 101 to the working position; wherein the bearing seat 102 is sleeved on both ends of the coating anilox roller 101 and connected to the coating anilox roller 101 through bearings, the coating anilox roller 101 is stably supported and fixed in the working position, thereby ensuring its coaxiality and stability during rotation and avoiding the influence of vibration on the coating accuracy.

[0027] The scraper assembly 2 further comprises a knife seat 202 arranged on one side of the coating anilox roller 101 and a pressing plate 203 arranged on the upper and lower sides of the knife seat 202, wherein the two scrapers 201 are fixed on the corresponding pressing plates 203 respectively, and the scraper 201 and the knife seat 202 form a scraper cavity when they contact with the coating anilox roller 101, wherein the pressing plate 203 fixes the scraper 201 on the knife seat 202 through a clamping groove or a pressing structure, so as to ensure the stable position of the scraper 201 during the working process and avoid loosening and deviation of the scraper 201 due to vibration or friction, and wherein the scraper 201, the coating anilox roller 101, the pressing plate 203 and the knife seat 202 are arranged together to form the scraper cavity, so as to reduce the leakage of the coating, improve the utilization rate of the coating and reduce pollution.

[0028] The scraper assembly 2 further comprises a fixing seat 205 arranged at both ends of the knife seat 202, and the driving assembly 4 further comprises a connecting piece 411 connected with the topless box 404, wherein the other side of the connecting piece 411 is connected with the fixing seat 205, and the driving assembly 4 is rigidly connected with the scraper assembly 2 through the connecting piece 411 and the fixing seat 205, so as to ensure efficient power transmission.

[0029] The scraper assembly 2 further comprises a reinforcing piece 206 arranged on the knife seat 202, wherein the reinforcing piece 206 is arranged on the knife seat 202, so as to enhance the structural strength and rigidity of the knife seat 202, avoid deformation of the knife seat 202 during driving of the driving assembly 4 or long-term working, and ensure the stability of the scraper 201.

[0030] In the present application, each device (parts without specific structure) is a general standard part or a part known to those skilled in the art, and its structure and principle can be known by technical personnel through a technical manual or through a conventional experimental method.

[0031] In the description of the embodiments of the present application, unless otherwise explicitly specified and limited, the terms "mounting", "connecting", "connecting" should be understood in a broad sense, for example, it can be fixedly connected, or it can be detachably connected, or integrally connected, it can be mechanically connected, or it can be electrically connected, it can be directly connected, or it can be indirectly connected through an intermediate medium, and it can be the communication inside two elements. For those skilled in the art, the specific meaning of the above terms in the present application can be understood according to the specific circumstances.

[0032] In the description of the present application, it should be noted that the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer" and the like indicate the orientation or positional relationship shown in the drawings based on the orientation or positional relationship shown in the drawings, and are only for the convenience of describing the present application and simplifying the description, and 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 cannot be understood as a limitation on the present application. In addition, the terms "first", "second", "third" are only for the purpose of description and cannot be understood as indicating or implying relative importance.

[0033] In several embodiments provided in the present application, it should be understood that the disclosed system, device and method can be implemented in other ways. The device embodiments described above are only schematic, for example, the division of the units is only a logical function division, and actual implementation can have another division manner, for example, a plurality of units or components can be combined or integrated into another system, or some features can be ignored or not executed. In addition, the coupling or direct coupling or communication connection between the units shown or discussed can be indirect coupling or communication connection through some communication interface, device or unit, which can be electrical, mechanical or other forms.

[0034] The units described as separate components can or can not be physically separated, and the components shown as units can or can not be physical units, i.e. they can be located in one place or distributed on a plurality of network units. Some or all of the units can be selected according to actual needs to achieve the purpose of the embodiment.

[0035] In addition, each functional unit in each embodiment of the present application can be integrated into a processing unit, or each unit can exist physically, or two or more units can be integrated into one unit.

[0036] Based on the above ideal embodiments according to the present application, through the above description, relevant personnel can make various changes and modifications without deviating from the scope of the technical idea of the present application. The technical scope of the present application is not limited to the contents of the specification, and must be determined by the scope of the claims.

Claims

1. A closed scraper constant distance adjustment device, characterized in that: include: A coating roller assembly (1) comprising: a coating anilox roller (101); A scraper assembly (2) comprising: two scrapers (201) in contact with the coating anilox roller (101); A support assembly (3) comprising: a bottom plate (301); Two drive assemblies (4) are symmetrically arranged on the bottom plate (301), each drive assembly (4) comprising: a cylinder (401); wherein The telescopic ends of the two cylinders (401) are connected to the scraper assembly (2); The main control module is electrically connected to the two cylinders (401); wherein The main control module is suitable for judging the degree of wear of the scraper (201) according to the working time, and controlling the extension and contraction length of the cylinder (401) so as to bring the scraper (201) into contact with the coating anilox roller (101).

2. The closed scraper constant distance adjustment device according to claim 1, characterized in that: The support assembly (3) further comprises: a first support plate (302) arranged on both ends of the bottom plate (301) and a second support plate (303) arranged on both ends of the bottom plate (301); wherein The two cylinders (401) are fixed on corresponding second support plates (303); The driving assembly (4) further comprises: two guide rails (402) arranged on the first support plate (302), a slider (403) slidably connected to the guide rails (402), and a topless box (404) connected to the two sliders (403); wherein The telescopic end of the cylinder (401) is connected to the topless box (404); and The two topless boxes (404) are connected to the scraper assembly (2); The cylinder (401) is suitable for driving the topless box (404) to move when extending and retracting, the topless box (404) drives the slider (403) to slide on the guide rail (402), and the topless box (404) drives the scraper assembly (2) to move, so that the scraper (201) contacts the coating anilox roller (101).

3. The closed scraper constant distance adjustment device according to claim 2, characterized in that: The support assembly (3) further comprises: a limiting block (304) arranged on the inner side of the first support plate (302); wherein The limiting block (304) is located in the topless box (404); The driving assembly (4) further comprises: a support base (405) arranged outside the topless box (404), a reducer (406) arranged outside the support base (405), a servo motor (407) connected to the reducer (406), a threaded sleeve (408) embedded in the side of the topless box (404), a screw rod (409) threadedly connected to the threaded sleeve (408), and a coupling (410) arranged in the support base (405); wherein Both ends of the coupling (410) are connected to the reducer (406) and the screw rod (409); The other end of the screw rod (409) abuts against the limit block (304); The main control module is electrically connected to the servo motor (407); and The servo motor (407) is adapted to drive the screw rod (409) to rotate via the reducer (406) and the coupling (410), and the screw rod (409) is engaged with the threaded sleeve (408) so that the screw rod (409) moves forward and backward and abuts against the screw rod (409).

4. The closed scraper constant distance adjustment device according to claim 3, characterized in that: The coating roller assembly (1) further comprises: bearing seats (102) sleeved on both ends of the coating anilox roller (101); The bearing seat (102) is connected to the bearing of the coating anilox roller (101); and The bearing seat (102) is suitable for being fixed on the machine base so as to install the coating anilox roller (101) to a working position.

5. The closed scraper constant distance adjustment device according to claim 4, characterized in that: The scraper assembly (2) further comprises: a blade seat (202) arranged on one side of the coating anilox roller (101) and pressure plates (203) arranged on the upper and lower sides of the blade seat (202); wherein The two scrapers (201) are respectively fixed on corresponding pressing plates (203); and The scraper (201) and the blade holder (202) form a scraper cavity when in contact with the coating anilox roller (101).

6. The closed scraper constant distance adjustment device according to claim 5, characterized in that: The scraper assembly (2) further comprises: fixing seats (205) arranged at both ends of the blade seat (202); The driving assembly (4) further comprises: a connecting piece (411) connected to the topless box (404); wherein The other side of the connecting member (411) is connected to the fixing seat (205).

7. The closed scraper constant distance adjustment device according to claim 6, characterized in that: The scraper assembly (2) further comprises a reinforcement member (206) arranged on the blade seat (202).

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