Intelligent coating mold capable of realizing closed-loop automatic adjustment of surface density

Abstract

The utility model discloses an intelligent coating mould that can carry out closed loop automatic regulation areal density, including upper mould, lower mould, actuating mechanism and controller, install the gasket between upper mould and lower mould to form the discharge channel, upper mould passes through a plurality of fastener and lower mould fixed connection, lower mould one side and middle part is provided with the feed channel, one side is provided with the feed channel, the lower mould is provided with the actuating mechanism, the controller is provided with the actuating mechanism. A containing cavity communicated with the feeding channel is formed in the lower die, backflow channels are formed in the positions, at the two ends of the containing cavity, of the upper die, and the die executing mechanism provides downward adjusting thrust through a piezoelectric ceramic actuator, provides upward adjusting thrust through a spring and is provided with a displacement sensor for detecting the actual adjusting position. And through closed-loop intelligent adjustment of the coating transverse surface density with the coating machine thickness gauge, the consistency and the adjustment efficiency of the coating surface density are improved.

Description

Technical Field

[0001] The utility model relates to the technical field of slit extrusion coating, in particular to a lithium electrode sheet coating die. Background Art

[0002] A key process in the manufacturing process of lithium batteries is to coat the cathode and anode slurries on the surface of the current collector. Most of the existing coating dies adopt manual adjustment methods, which have high requirements for employees' debugging skills and sense of responsibility. During the production process, the debugging efficiency of the first coated piece is often low. A large amount of adjustment material is wasted due to unskilled employees' skills. Poor sense of responsibility or low adjustment level of employees leads to low product quality or even batch quality accidents, affecting production efficiency and the yield rate. Therefore, we provide an intelligent coating die that can perform closed-loop automatic adjustment of the surface density to solve the above problems. Content of the Utility Model

[0003] The purpose of the utility model is to make up for the deficiencies of the existing technology and provide an intelligent coating die that can perform closed-loop automatic adjustment of the surface density.

[0004] An intelligent coating die that can perform closed-loop automatic adjustment of the surface density includes an upper die, a lower die, an actuating mechanism and a controller. A gasket is installed between the upper die and the lower die to form a discharge channel. The upper die is fixedly connected to the lower die through a plurality of fasteners. A feed channel is arranged in the middle of one side of the lower die. A cavity communicated with the feed channel is arranged on the lower die. Return flow channels are arranged at both ends of the cavity on the upper die. The actuating mechanism includes an upper fixed bracket fixedly connected to the upper die. A piezoelectric ceramic actuator capable of providing a downward adjustment thrust is installed on the upper fixed bracket. A regulating rod is abutted against the lower end of the piezoelectric ceramic actuator. A choke block is connected to the lower end of the regulating rod. An inner pressure cover is fixedly connected to the upper end of the regulating rod. An outer pressure cover is fixedly connected above the inner pressure cover. The outer pressure cover is locked with the inner pressure cover through side screws. A spring capable of providing an upward adjustment thrust is arranged outside the upper end of the regulating rod and below the inner pressure cover. A displacement sensor for detecting the actual adjustment position is arranged on one side of the piezoelectric ceramic actuator. The actuating mechanism communicates with the thickness gauge of the coater to perform closed-loop intelligent adjustment of the coating transverse surface density, improving the surface density consistency and adjustment efficiency.

[0005] Furthermore, the piezoelectric ceramic actuator is electrically connected to the controller.

[0006] Furthermore, a threaded hole is arranged at the upper end of the regulating rod. The inner pressure cover is connected to the upper end of the regulating rod by locking a bolt into the threaded hole.

[0007] Furthermore, the inner pressure cover includes an annular base body and an annular step arranged on the upper surface of the annular base body.

[0008] Furthermore, a convex part for contacting the displacement sensor is arranged on one side of the outer pressure cover.

[0009] Furthermore, a hinge is provided between the upper mold and the lower mold, enabling online mold opening and cleaning.

[0010] Furthermore, back alignment blocks and side alignment blocks for preventing the skew installation of the die head are provided on the backs of the upper mold and the lower mold.

[0011] Furthermore, a guiding sliding sleeve is provided on the outer side of the upper end of the adjusting rod. When the adjusting rod moves up and down, its sliding property is increased and the friction is reduced.

[0012] Compared with the prior art, the intelligent coating die has the following beneficial effects: The upper mold and the lower mold of this coating die are connected by a hinge connection, which is convenient for disassembly and assembly and has higher precision; Due to the connection of the controller, the piezoelectric ceramic actuator, the displacement sensor and the adjusting rod, high-precision closed-loop intelligent control of the coating amount of the die can be realized, the requirements for the debugging skills and responsibility of employees can be reduced, and manpower can be saved; The debugging efficiency is improved and the debugging scrap is reduced; It not only improves the consistency level of the product surface density, but also improves the comprehensive performance of the product. BRIEF DESCRIPTION OF THE DRAWINGS

[0013] Figure 1 It is a schematic structural diagram of the front side of the present utility model;

[0014] Figure 2 It is a schematic structural diagram of the rear side of the present utility model;

[0015] Figure 3 It is a schematic structural diagram of the actuator;

[0016] Figure 4 is Figure 1 a partial enlarged view of part A in

[0017] Figure 5 It is a schematic structural diagram of the actuator after being disassembled;

[0018] Figure 6 It is a principle block diagram of the closed-loop control of the present utility model. DETAILED DESCRIPTION OF THE EMBODIMENTS

[0019] The present invention will be further described in detail below with reference to the drawings and specific embodiments. In the description of the present invention, it should be understood that the orientation or positional relationship indicated by the terms "longitudinal", "transverse", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", etc. is based on the orientation or positional relationship shown in the drawings, and is only for the convenience of describing the present case, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be construed as a limitation to the present case.

[0020] An embodiment of an intelligent coating die capable of performing closed-loop automatic adjustment of surface density includes an upper die 1, a lower die 2, an actuator 3 and a controller. A gasket 12 is installed between the upper die 1 and the lower die 2 to form a discharge channel. The upper die 1 is fixedly connected to the lower die 2 through a plurality of fasteners. A feed channel 13 is provided in the middle of one side of the lower die 2. A cavity communicating with the feed channel is provided on the lower die 2. Return flow channels 14 are provided at both ends of the cavity on the upper die 1. The actuator 3 includes an upper fixed bracket 31 fixedly connected to the upper die. A piezoelectric ceramic actuator 32 capable of providing a downward adjustment thrust is installed on the upper fixed bracket 31. A regulating rod 33 is abutted against the lower end of the piezoelectric ceramic actuator 32. A choke block 332 is connected to the lower end of the regulating rod 33. An inner pressure cover 34 is fixedly connected to the upper end of the regulating rod 33. An outer pressure cover 35 is fixedly connected above the inner pressure cover 34. The outer pressure cover 35 is locked with the inner pressure cover 34 through side screws 36. A spring 37 capable of providing an upward adjustment thrust is provided outside the upper end of the regulating rod 33 and below the inner pressure cover 34. A displacement sensor 38 for detecting the actual adjustment position is provided on one side of the piezoelectric ceramic actuator 32. The displacement sensor 38 communicates with the thickness gauge of the coater to perform closed-loop intelligent adjustment of the coating transverse surface density. Through this adjustment, the consistency and adjustment efficiency of the coating surface density can be greatly improved.

[0021] Furthermore, the piezoelectric ceramic actuator 32 is electrically connected to the controller. As Figure 6 shown, by changing the output voltage of the controller, the lower actuator of the piezoelectric ceramic actuator 32 can be extended or shortened.

[0022] Furthermore, a threaded hole is provided at the upper end of the regulating rod 33. The inner pressure cover 34 is fixedly connected to the upper end of the regulating rod 33 by locking a bolt 341 into the threaded hole.

[0023] Furthermore, the inner pressure cover 34 includes an annular base body 342 and an annular step 343 provided on the upper surface of the annular base body 342.

[0024] Furthermore, a convex portion 351 for contacting the displacement sensor 38 is provided on one side of the outer pressure cover 35. When the outer pressure cover 35 moves up and down with the regulating rod 33, the displacement sensor 38 will detect the relevant adjustment amount.

[0025] Furthermore, a hinge 16 is provided between the upper die 1 and the lower die 2, which can open the die online for cleaning. When the die needs to be cleaned, only need to turn the relevant fasteners, and then make the upper die 1 and the lower die 2 rotate around the hinge 16 to open, which is convenient for reassembly after cleaning.

[0026] Furthermore, back alignment blocks 15 and side alignment blocks 17 for preventing the die head from being installed obliquely are provided on the backs of the upper die 1 and the lower die 2.

[0027] Further, a guiding sliding sleeve 331 is provided on the outer side of the upper end of the adjusting rod 33, which increases its sliding property and reduces the friction force when the adjusting rod moves up and down.

[0028] Working principle: During operation, an initial value is preset, and the controller outputs a voltage to the piezoelectric ceramic actuator. The piezoelectric ceramic actuator elongates and pushes the flow blocking block downward through the adjusting rod to achieve downward adjustment. At this time, the displacement sensor detects the adjustment amount and transmits the data to the thickness gauge to detect the coating thickness. When the coating thickness reaches the required thickness, the controller controls the piezoelectric ceramic actuator to stop elongating and maintains the current coating thickness. During the coating process, due to the deposition and blockage of the coating liquid, the coating amount will become smaller, and at this time the coating thickness also decreases. At this time, the displacement sensor detects the thickness again and sends the data to the controller. At this time, the flow blocking block needs to move upward, and the controller will reduce the voltage output to the piezoelectric ceramic actuator. The spring uses its elastic force to push the adjusting rod and the flow blocking block upward to achieve upward movement, thereby increasing the coating liquid outlet and the coating amount and making it return to the required thickness. The whole process is a closed-loop intelligent adjustment, without manual intervention, greatly reducing the labor, realizing the automation of coating, and greatly improving the consistency of the coating surface density and the adjustment efficiency.

[0029] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention and are not intended to limit them; although the present invention has been described in detail with reference to the preferred embodiments, those of ordinary skill in the art should understand that it is still possible to modify the specific implementation manners of the present invention or perform equivalent replacements for some technical features; without departing from the spirit of the technical solutions of the present invention, they should all be covered within the scope of the technical solutions claimed by the present invention.

Claims

1. An intelligent coating die capable of performing closed-loop automatic adjustment of surface density, comprising an upper die, a lower die, an actuator and a controller. A gasket is installed between the upper die and the lower die to form a discharge channel. The upper die is fixedly connected to the lower die through a plurality of fasteners. A feed channel is arranged in the middle of one side of the lower die. A cavity communicating with the feed channel is provided on the lower die. Return flow channels are arranged at both ends of the cavity on the upper die. The actuator includes an upper fixed bracket fixedly connected to the upper die. A piezoelectric ceramic actuator capable of providing a downward adjustment thrust is installed on the upper fixed bracket. A regulating rod is abutted against the lower end of the piezoelectric ceramic actuator. A flow blocking block is connected to the lower end of the regulating rod. It is characterized in that, The upper end of the adjusting rod is fixedly connected with an inner pressure cover, and an outer pressure cover is fixedly connected above the inner pressure cover. The outer pressure cover is locked with the inner pressure cover by side screws. A spring capable of providing an upward adjusting thrust is arranged outside the upper end of the adjusting rod and below the inner pressure cover. A displacement sensor for detecting the actual adjusting position is arranged on one side of the piezoelectric ceramic actuator. The actuator is in data communication connection with the coating thickness gauge of the coater to perform closed-loop intelligent adjustment of the coating transverse surface density.

2. The intelligent coating die capable of performing closed-loop automatic adjustment of surface density according to claim 1, wherein: The piezoelectric ceramic actuator is electrically connected with the controller.

3. The intelligent coating die capable of performing closed-loop automatic adjustment of surface density according to claim 2, wherein: The upper end of the adjusting rod is provided with a threaded hole, and the inner pressure cover is connected with the upper end of the adjusting rod by locking a bolt into the threaded hole.

4. The intelligent coating die capable of performing closed-loop automatic adjustment of surface density according to claim 3, wherein: The inner pressure cover includes an annular base body and an annular step arranged on the upper surface of the annular base body.

5. The intelligent coating die capable of performing closed-loop automatic adjustment of surface density according to claim 4, wherein: One side of the outer pressure cover is provided with a convex part for contacting with the displacement sensor.

6. An intelligent coating die capable of performing closed-loop automatic adjustment of surface density according to claim 5, characterized in that: A hinge is arranged between the upper die and the lower die, and the die can be opened online for cleaning.

7. An intelligent coating die capable of performing closed-loop automatic adjustment of surface density according to claim 6, characterized in that: Back alignment blocks and side alignment blocks for preventing the die head from being installed obliquely are arranged on the backs of the upper die and the lower die.

8. The intelligent coating die capable of performing closed-loop automatic adjustment of surface density according to claim 7, wherein: A guiding sliding sleeve is arranged outside the upper end of the adjusting rod.

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