Fine adjustment device for metering rod of coating machine

Abstract

The utility model provides a coating machine metering rod fine adjustment device which comprises a fine adjustment support, a fine adjustment nut is arranged in the fine adjustment support, and the fine adjustment nut is rotationally connected with the fine adjustment support. A screw rod is arranged in the fine adjustment nut, and the fine adjustment nut and the screw rod form a pair of thread pairs; the screw rod comprises a threaded section matched with the fine adjustment nut and a smooth section without threads; a glue scraping plate which is always matched with the smooth section is arranged in the fine adjustment nut; a limiting block is arranged at the unthreaded end of the screw and connected with the air bag groove.

Description

Technical Field

[0001] The utility model belongs to the field of papermaking equipment, and in particular relates to a metering rod fine-tuning device for a coating machine. Background Art

[0002] Coating is a method of coating a paste polymer, a molten polymer or a polymer melt on paper, cloth or plastic film to obtain a composite material (film). During coating, a film of a certain thickness is formed on the coating roller, and then the distance between the metering rod and the coating roller is adjusted to adjust the coating amount on the coating roller surface, thereby adjusting the coating quality of the paper, cloth or plastic film.

[0003] Utility model patent CN206545140U discloses a metering device for glue application, in which the metering rod loading airbag, metering rod adjusting bolt, metering rod adjusting block and metering rod seat clamping airbag jointly adjust the contact pressure between the metering rod and the glue roller, so that the roller surface is evenly glued. However, the use environment of the coating machine is relatively harsh, with high temperature, large amounts of moisture, dust, paint or rubber around, and the metering device is exposed to such an environment. After long-term use, a large amount of rubber adheres to the surface of the screw, and rubber and dust enter the device, resulting in the inability of the fine-tuning screw and the fine-tuning nut to rotate with each other, affecting the left and right movement of the fine-tuning screw, resulting in the inability to adjust the left and right position of the airbag slot, affecting the coating amount on the surface of the coating roller, and then affecting the coating amount on the surface of the paper, affecting the quality of the paper. Utility Model Content

[0004] In order to solve the above problems, the utility model provides a coating machine metering rod fine-tuning device.

[0005] The purpose of the utility model is achieved in the following ways:

[0006] A coating machine metering rod fine-tuning device comprises a fine-tuning support, in which a fine-tuning nut is arranged, and the fine-tuning nut is rotatably connected to the fine-tuning support; a screw is arranged in the fine-tuning nut, and the fine-tuning nut and the screw form a pair of thread pairs; the screw comprises a threaded section cooperating with the fine-tuning nut and a smooth section without threads; a scraper plate which always cooperates with the smooth section is arranged in the fine-tuning nut; a limit block is arranged at the non-threaded end of the screw, and the limit block is connected to the airbag groove 4.

[0007] The coating machine metering rod fine-tuning device is characterized in that a male stop is arranged circumferentially in the middle of the inner side of the fine-tuning support; a female stop is arranged on one side of the male stop, and a positioning sleeve and a spring retaining ring are arranged on the other side of the male stop; the female stop and the positioning sleeve 12 clamp the male stop on both sides of the male stop to limit the fine-tuning nut and prevent the fine-tuning nut from moving axially.

[0008] In the coating machine metering rod fine-tuning device, a sealing ring is arranged between the female stop and the fine-tuning support, and sealing rings are arranged between the positioning sleeve 12 and the fine-tuning support, and between the positioning sleeve and the fine-tuning nut.

[0009] In the coating machine metering rod fine-tuning device, one side of the airbag groove 4 is fixedly connected to the airbag, and the other side is provided with a limit groove matched with the limit block. After the limit block is inserted into the limit groove, the screw cannot rotate.

[0010] In the coating machine metering rod fine-tuning device, a lubricating copper sleeve is arranged between the male stop and the fine-tuning nut 2.

[0011] Compared with the prior art, the utility model scrapes off the rubber and dust adhered to the screw rod by a rubber scraper to ensure that the rubber and dust do not enter the thread pair; a sealing ring is provided to prevent the rubber and dust from entering between the fine-tuning nut and the fine-tuning support; and the fine-tuning device can still flexibly and accurately adjust the metering rod after long-term use. BRIEF DESCRIPTION OF THE DRAWINGS

[0012] Figure 1 It is a schematic diagram of the fine-tuning support, fine-tuning nut and screw;

[0013] Figure 2 It is a schematic diagram of the utility model after installation. DETAILED DESCRIPTION

[0014] The following will be combined with the drawings in the embodiments of the utility model to clearly and completely describe the technical solutions in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments in the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.

[0015] In the present utility model, unless otherwise expressly specified and limited, the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", "clockwise", "counterclockwise", "axial", "radial", "circumferential" and the like to indicate the orientation or position relationship are based on the orientation or position relationship shown in the accompanying drawings, and are only for the convenience of describing the present utility model and simplifying the description, and do not indicate or imply that the referred device or element must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation on the present utility model.

[0016] like Figure 1-2As shown, a coating machine metering rod fine-tuning device comprises a fine-tuning support 1, in which a fine-tuning nut 2 is arranged, and the fine-tuning nut 2 is rotatably connected to the fine-tuning support 1; a screw rod 3 is arranged in the fine-tuning nut 2, and the fine-tuning nut 2 and the screw rod 3 form a pair of thread pairs; the screw rod 3 comprises a threaded section 31 cooperating with the fine-tuning nut 2 and a smooth section 32 without threads; a scraper plate 321 which always cooperates with the smooth section 32 is arranged in the fine-tuning nut 2; a limit block 33 is arranged at the non-threaded end of the screw rod 3 to prevent the screw rod from rotating, and the limit block 33 is connected to the airbag groove 4.

[0017] The fine-tuning support 1 is fixed on the coating beam 61 by a nut. The fine-tuning nut 2 and the screw 3 form a set of thread pairs. Turning the fine-tuning nut 2 can make the screw 3 move axially, thereby driving the airbag groove 4 to move and adjust the pressure between the metering rod 62 and the coating roller 7. Figure 1 As shown, when the screw 3 moves to the left to the extreme position, the threaded section 31 is still on the right side of the scraper plate 321, ensuring that the scraper plate 321 is always coordinated with the smooth section 32, and the threaded section 31 will never be exposed outside the fine-tuning nut 2. During use, the external thread of the screw 3 will not be exposed to the external environment, and external impurities will not adhere to the external thread of the fine-tuning screw 3; the scraper plate 321 is arranged inside the fine-tuning nut 2 to scrape off the rubber adhered to the screw in time, ensuring that the rubber does not enter the thread pair, thereby ensuring that the fine-tuning nut 2 can rotate flexibly.

[0018] The coating machine metering rod fine-tuning device is characterized in that a male stop 11 is arranged in the middle of the inner side of the fine-tuning support 1 along the circumferential direction; a female stop 21 is arranged on one side of the male stop 11 for the fine-tuning nut 2, and a positioning sleeve 12 and a spring retaining ring 13 are arranged on the other side of the male stop 11; the female stop 21 and the positioning sleeve 12 clamp the male stop 11 on both sides of the male stop 11 to limit the fine-tuning nut 2 and prevent the fine-tuning nut 2 from moving axially. During installation, the male stop 11 is first aligned with the female stop 21, and then the positioning sleeve 12 is installed, and finally the spring retaining ring 13 is installed.

[0019] In the coating machine metering rod fine-tuning device, a sealing ring 22 is arranged between the female stop 21 and the fine-tuning support 1, and a sealing ring 21 is arranged between the positioning sleeve 12 and the fine-tuning support 1, and between the positioning sleeve 12 and the fine-tuning nut. The sealing ring can prevent external rubber, dust, and water vapor from entering between the fine-tuning support 1 and the fine-tuning nut 2, and prevent impurities from affecting the rotation of the fine-tuning nut 2.

[0020] The described coating machine metering rod fine-tuning device has an airbag 41 fixedly connected to one side of the airbag groove 4, and a limit groove 42 cooperating with the limit block 33 is provided on the other side. The limit block 33 cannot rotate after being inserted into the limit groove 42, ensuring that when the fine-tuning nut 2 is adjusted, the screw rod 3 can only move axially and does not rotate with the fine-tuning nut 2.

[0021] In the coating machine metering rod fine-tuning device, a lubricating copper sleeve 5 is arranged between the fine-tuning support 1 and the fine-tuning nut 2. The lubricating copper sleeve has good self-lubrication and is arranged between the male stop convex part and the fine-tuning nut to ensure that the fine-tuning nut 2 can rotate flexibly in the fine-tuning support.

[0022] The method of using the utility model is as follows: when in use, the fine-tuning support 1 is fixed on the coating beam by a nut, and the fine-tuning nut 2 can only rotate under the joint action of the fine-tuning support 1, the positioning sleeve 12 and the spring retaining ring 13, and will not move left and right; when the pressure of the metering rod 62 and the coating roller 7 needs to be increased, the fine-tuning nut is turned counterclockwise, and the screw 3 is driven to move left by the thread pair, pushing the airbag groove 4 to move left; when the pressure of the metering rod 62 and the coating roller 7 needs to be reduced, the fine-tuning nut 2 is turned clockwise, and the screw 3 is driven to move right by the thread pair, pulling the airbag groove 4 to move right. If there is adhesive material adhered to the exposed part of the screw 3, the rubber scraper 321 scrapes off the adhesive material on it.

[0023] The advantages of the utility model are: a sealing ring is arranged inside the fine-tuning device to prevent external water vapor and rubber from flowing into the fine-tuning device to affect the rotation of the fine-tuning nut 2, a scraper plate 321 is arranged inside the fine-tuning nut 2 to scrape off impurities on the fine-tuning screw to prevent them from entering between the threaded connection pairs, and precision threads are arranged inside and outside the fine-tuning nut. The above structure ensures that the fine-tuning nut can rotate flexibly, driving the screw 3 to move left and right, and then driving the airbag groove to move flexibly left and right to adjust the pressure between the metering rod and the coating roller, and adjust the coating amount.

[0024] The above is only a preferred embodiment of the present invention. It should be pointed out that those skilled in the art can make several changes and improvements without departing from the overall concept of the present invention, and these should also be regarded as the protection scope of the present invention.

Claims

1. A coating machine metering rod fine-tuning device, comprising a fine-tuning support (1), characterized in that: A fine-tuning nut (2) is arranged in the fine-tuning support (1), and the fine-tuning nut (2) is rotatably connected to the fine-tuning support (1); a screw rod (3) is arranged in the fine-tuning nut (2), and the fine-tuning nut (2) and the screw rod (3) form a pair of threaded pairs; the screw rod (3) comprises a threaded section (31) cooperating with the fine-tuning nut (2) and a smooth section (32) without threads; a scraper plate (321) is arranged in the fine-tuning nut (2) and always cooperates with the smooth section (32); a limit block (33) is arranged at one end of the screw rod (3) without threads, and the limit block (33) is connected to the airbag groove (4).

2. The coating machine metering rod fine-tuning device according to claim 1, characterized in that: A male stop (11) is arranged in the middle of the inner side of the fine-tuning support (1) along the circumferential direction; a female stop (21) is arranged on one side of the male stop (11) of the fine-tuning nut (2), and a positioning sleeve (12) and a spring retaining ring (13) are arranged on the other side of the male stop (11); the female stop (21) and the positioning sleeve (12) clamp the male stop (11) on both sides of the male stop (11) to limit the fine-tuning nut (2) and prevent the fine-tuning nut (2) from moving in the axial direction.

3. A coating machine metering rod fine-tuning device as claimed in claim 2, characterized in that: A sealing ring (22) is arranged between the female stop (21) and the fine-tuning support (1), and a sealing ring (22) is arranged between the positioning sleeve (12) and the fine-tuning support (1), and between the positioning sleeve and the fine-tuning nut (2).

4. The coating machine metering rod fine-tuning device according to claim 3, characterized in that: One side of the airbag groove (4) is fixedly connected to the airbag (41), and the other side is provided with a limiting groove (42) that cooperates with the limiting block (33). After the limiting block (33) is inserted into the limiting groove (42), the screw rod (3) cannot rotate.

5. A coating machine metering rod fine-tuning device as claimed in claim 4, characterized in that: A lubricating copper sleeve (5) is provided between the fine-tuning support (1) and the fine-tuning nut (2).

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