A constant thickness doctor blade for applying a surface paste to a ring-shaped cake batter

Abstract

The application discloses a kind of ring cake embryo surface sizing agent's fixed thickness doctoring device, including rack, the top of the rack is fixedly installed with vertical conical sizing agent hopper, the bottom of the vertical conical sizing agent hopper is connected and is installed with sizing agent supply mechanism, the output end of the sizing agent supply mechanism is communicated with feed hose, and the end of the feed hose is communicated and installed with sizing agent uniform distribution mechanism;The device further includes station conversion mechanism and fixed thickness doctoring mechanism, the station conversion mechanism is assembled on rack, and the transmission end of the station conversion mechanism is connected with two groups of symmetrical arrangement ring cake table, the sizing agent uniform distribution mechanism is adapted with ring cake table alignment, and the top of the ring cake table is fixedly installed with center rod.The device uses fixed thickness coating of quantitative feeding, ultrasonic defoaming shaping, double-station rotation continuous operation structure, solves the problem that traditional cake embryo sizing agent processing is uneven, easy to bubble, low efficiency.

Description

Technical Field

[0001] This invention relates to the field of food processing paste coating equipment, and in particular to a fixed-thickness paste coating device for the surface of a ring-shaped cake base. Background Technology

[0002] In the deep processing of ring-shaped cake bases, surface coating, smoothing, and shaping are key steps to improve the cake's appearance, texture, and taste. The traditional processing method is as follows: Manual spreading and smoothing: The operator holds a scraper or spatula and manually spreads the batter onto the surface of a rotating ring-shaped cake base. The advantage is flexibility, but it relies entirely on the operator's experience, resulting in inconsistent batter thickness, low production efficiency, and potential food hygiene risks.

[0003] Rotary dipping and swirl coating: The ring-shaped cake base is immersed entirely in the batter and then removed. Excess batter is swirl-discarded using centrifugal rotation. The uniformity of batter coverage is acceptable, but the thickness is greatly affected by the rotation speed, batter viscosity, and temperature. There are significant differences in batter thickness on the inner and outer ring surfaces and sides of the ring-shaped cake, and there is also a large amount of material waste.

[0004] Fixed scraper rotation: The ring-shaped cake base is placed on a rotating table, and a scraper with a fixed gap is set on the side or top of the base. Excess batter is scraped off by rotating the base. The scraper gap is not adjustable or can only be preset manually, which cannot adapt to the size deviation of the ring-shaped cake base and the curvature changes of the inner and outer ring surfaces, resulting in the batter being too thin on the outer ring surface and too thick on the inner ring surface.

[0005] Traditional processing methods rely heavily on manual application of slurry or simple fixed spraying equipment, which have many technical drawbacks: manual operation depends on the operator's experience, the thickness of the slurry is difficult to control uniformly, the finished product has poor consistency, and manual defoaming is ineffective, resulting in defects such as bubbles, pinholes, uneven thickness, and localized slurry shortages on the cake surface; traditional simple spraying equipment is mostly a single-station fixed structure, which cannot achieve continuous production with station rotation, resulting in low processing efficiency. Summary of the Invention

[0006] To overcome the shortcomings of existing technologies, this invention provides a fixed-thickness scraping device for the surface slurry of a ring-shaped cake base, which solves the technical problems of uneven thickness, easy bubbling, low processing efficiency, lack of fixed-thickness control, cumbersome equipment operation and maintenance cleaning, and poor product consistency in traditional cake base slurry processing.

[0007] To solve the above-mentioned technical problems, the present invention provides the following technical solution: A thickness-fixed coating device for a ring-shaped cake base includes a frame. A vertical conical hopper is fixedly mounted on the top of the frame. A hopper is connected to a slurry supply mechanism at its bottom. The output end of the slurry supply mechanism is connected to a feeding hose, and the end of the feeding hose is connected to a slurry distribution mechanism. The device also includes a station switching mechanism and a thickness-fixed coating mechanism. The station switching mechanism is mounted on the frame, and its transmission end is connected to two symmetrically arranged ring-shaped cake trays. The slurry distribution mechanism... The mechanism is aligned and adapted to the circular cake stand, with a central rod fixedly installed at the top of the circular cake stand; the thickness-fixed coating mechanism is located on the top of the frame, and includes a coating adjustment unit and a coating unit, with the coating adjustment unit fixedly installed on the top of the frame and the coating unit fixedly connected to the movable end of the coating adjustment unit; a cleaning box is fixedly installed on the top of the frame corresponding to the working stroke position of the coating unit, and the cleaning box is aligned and cooperates with the coating unit for receiving the slurry and washing and cleaning the coating unit after the operation is completed.

[0008] Compared with existing technologies, the advantages of this invention are as follows: This device achieves automated, consistent-thickness, and uniform slurry coating for ring-shaped cake bases, integrating automatic feeding, precise flow control, rotary slurry mixing, dual-station alternating operation, consistent-thickness ultrasonic slurry coating, and automatic cleaning functions. Through the alternating loading and unloading of materials and slurry application on a dual-station ring-shaped cake table, uninterrupted continuous production is achieved. The duckbill-type flat slurry outlet structure, combined with flow control, achieves consistent slurry thickness coating. Combined with an arc-shaped, conforming slurry coating structure and ultrasonic defoaming function, it effectively solves the problems of uneven slurry thickness, numerous surface bubbles, poor flatness, low production efficiency, and poor product consistency associated with traditional manual slurry application.

[0009] In this embodiment, the slurry supply mechanism includes a slurry pump, which is fixedly installed at the bottom of the frame. A metal pipe is connected between the bottom of the vertical conical slurry hopper and the inlet end of the slurry pump. A flow solenoid valve is installed on the metal pipe. The outlet end of the slurry pump is connected and fixedly connected to the feed hose.

[0010] Compared with the prior art, the advantages of the present invention are as follows: the vertical conical slurry hopper is used to store baking slurry, and the conical structure can avoid slurry accumulation and residue; the metal pipe realizes stable slurry delivery, and the flow solenoid valve can accurately control the slurry delivery flow rate, thereby matching and setting the coating thickness to realize controllable and adjustable slurry coating thickness; the slurry pump provides stable power for slurry delivery, and the supply hose has flexible adaptability, which can follow the displacement of the slurry distribution mechanism and bend adaptively to ensure that dynamic supply does not pull or leak.

[0011] In this embodiment, the slurry distribution mechanism includes a support platform, which is fixedly installed on the top of the frame. An electric cylinder is fixedly mounted on the top of the support platform. A pipe fixing component is fixedly installed on the telescopic output shaft of the electric cylinder. A slot is provided on the pipe fixing component, and a bent pipe is fixedly engaged inside the slot. A sealing groove is provided at one end of the bent pipe near the feeding hose. The feeding hose is rotatably sealed to the bent pipe through the sealing groove. A duckbill slurry distribution port is inclinedly provided at one end of the bent pipe near the annular cake stand. The duckbill slurry distribution port has a flat duckbill structure.

[0012] Compared with the prior art, the advantages of the present invention are as follows: the support platform provides a stable mounting base for the electric cylinder, which can drive the pipe fixing parts to extend and retract back and forth, and accurately adjust the slurry distribution position and spraying distance of the duckbill slurry distribution port; the bent pipe is fixed by snap-fit ​​and easy to disassemble and assemble, and the flat duckbill structure at the end can extend the linear slurry into a surface that is evenly spread, ensuring that the slurry is initially evenly distributed on the surface of the cake base; the rotary sealing connection structure can be adapted to angle adjustment, and slurry leakage is completely eliminated.

[0013] In this embodiment, a locking screw hole is provided at the top of the pipe fixing component, and a locking screw is connected to the internal thread of the locking screw hole. By tightening the locking screw to tighten and limit the position, the bent pipe is locked and fixed.

[0014] Compared with the prior art, the advantages of the present invention are: the locking screw can lock and limit the bent tube after it is clamped, preventing the bent tube from shifting, loosening, or deviating due to vibration during equipment operation, ensuring that the slurry angle and position are accurate and constant, and ensuring the uniformity of slurry application. The tilt angle of the bent tube can be manually adjusted by loosening the locking screw to adapt to the slurry application needs of different specifications of cake bases.

[0015] In this embodiment, the workstation conversion mechanism includes a second stepper motor, which is fixedly installed at the bottom of the frame. The output shaft of the second stepper motor is fixedly connected to a second rotating shaft. The second rotating shaft is vertically rotatably mounted on the frame via bearings. The top end of the second rotating shaft extends to the top of the frame and is fixedly mounted with a support plate. Both ends of the support plate are rotatably mounted with round shafts. The top ends of the two round shafts are fixedly mounted with magnetic hexagonal rods. The bottom of the two annular cake stands is provided with hexagonal slots, and the magnetic hexagonal rods are magnetically inserted into the hexagonal slots.

[0016] Compared with the prior art, the advantages of the present invention are as follows: the second stepper motor can drive the support plate to rotate and change direction precisely, realize the 180° interchange of the two sets of ring cake tables, and complete the uninterrupted rotation of feeding, spreading, scraping and unloading operations, which greatly improves production efficiency; the magnetic hexagonal rod and hexagonal groove magnetically cooperate to accurately position and conveniently disassemble and assemble, which facilitates the disassembly, cleaning and replacement of the cake table, and can drive the cake table to rotate synchronously to meet the needs of rotating slurry and rotating scraping operations.

[0017] In this embodiment, the workstation conversion mechanism further includes two sets of symmetrically arranged servo motors. Both servo motors are fixedly installed on the top of the frame, and drive gears are fixedly installed on the output shafts of both servo motors. Drive gears are fixedly installed on the bottom ends of both round shafts, and the drive gears and drive gears mesh and transmit power in a one-to-one correspondence.

[0018] Compared with the prior art, the advantages of the present invention are: the servo motor drives the round shaft to rotate precisely through gear meshing, providing stable and uniform rotational power for the ring cake stand, ensuring that the cake base rotates evenly, and in conjunction with the duckbill spout and scraping structure, achieving uniform spouting and fixed thickness scraping throughout the entire area.

[0019] In this embodiment, the thickness-fixed coating mechanism includes a first stepper motor, which is fixedly installed at the bottom of the frame. The output shaft of the first stepper motor is fixedly mounted with a first rotating shaft. The first rotating shaft is vertically rotated and mounted on the frame via bearings. A telescopic groove is provided at the top of the first rotating shaft. A telescopic hexagonal rod is vertically slidably mounted inside the telescopic groove. A height adjustment plate is fixedly installed at the outer end of the telescopic hexagonal rod. A connector is mounted on the outer side of the height adjustment plate. A coating unit is detachably mounted on the connector.

[0020] Compared with the prior art, the advantages of the present invention are as follows: the first stepper motor can drive the first rotating shaft to rotate horizontally, realizing the switching between the coating unit work station and the cleaning station; the telescopic hexagonal rod can be vertically extended and retracted to precisely adjust the working height of the coating unit, adapting to different thicknesses of cake bases and different coating thickness process requirements; the hexagonal sliding structure prevents rotation and limits movement, ensuring smooth lifting and precise positioning, and guaranteeing stable coating accuracy.

[0021] In this embodiment, an electric push rod is fixedly installed inside the telescopic groove, and the telescopic output shaft of the electric push rod is fixedly connected to the bottom end of the telescopic hexagonal rod.

[0022] Compared with the prior art, the advantages of the present invention are: the electric push rod provides precise power for the lifting and lowering of the telescopic hexagonal rod, which can realize micro-precision lifting and lowering adjustment, accurately control the pressing depth of the scraping unit, thereby accurately controlling the thickness of the slurry scraping and achieving fixed thickness processing.

[0023] In this embodiment, the coating unit includes a coating plate, which has an n-shaped structure. Both sides of the coating plate are set as arc surfaces and are arranged to coincide with the axis of the central rod. An electrical control box is fixedly installed on the top of the coating plate, and an ultrasonic transducer is embedded and fixed inside the electrical control box.

[0024] Compared with the prior art, the advantages of the present invention are as follows: the n-shaped scraper can be perfectly fitted on the outside of the ring-shaped cake base, and the arc surface can be precisely fitted with the outer circle of the cake base. With rotation, it can achieve uniform thickness and smoothing throughout the entire area; the built-in ultrasonic transducer can generate high-frequency ultrasonic waves during the scraping process to vibrate and defoam the slurry, eliminate surface bubbles and pinholes, and improve the smoothness of the slurry surface and the fineness of the finished product.

[0025] In this embodiment, a mounting block is fixedly installed on the top of the electrical control box. The mounting block has a plug-in groove, the plug-in has a positioning groove, and the top of the mounting block has a bolt hole. A positioning bolt is threaded into the bolt hole. The positioning bolt is aligned and locked with the positioning groove, thus fixing the plug-in inside the plug-in groove.

[0026] Compared with the prior art, the advantages of the present invention are: it adopts a detachable structure with plug-in and bolt locking, which ensures stable assembly and precise positioning, and allows for quick disassembly of the coating unit.

[0027] Compared with the prior art, the beneficial effects that this invention can achieve are: 1. Precise flow control and high processing accuracy: This device uses a flow solenoid valve to precisely regulate the output flow of the slurry. Combined with a duckbill-type uniform distribution structure that can finely adjust the slurry distribution angle and position, it can precisely control the slurry coating thickness according to process requirements, completely solving the problems of uneven thickness, slurry overflow, and slurry shortage and leakage in traditional processing, resulting in excellent consistency of finished product thickness.

[0028] 2. Ultrasonic vibration defoaming for better finished product quality: The ultrasonic defoaming function is integrated into the coating and leveling process, which can effectively eliminate air bubbles and surface pinholes in the batter, making the batter on the cake base smooth, flat and glossy, greatly improving the appearance and taste of the product.

[0029] 3. Dual-station rotation for high production efficiency: The 180° rotating dual-station rotation structure enables uninterrupted continuous operation of slurry application, coating, and loading / unloading, eliminating the traditional single-station intermittent operation mode. This significantly improves equipment utilization and makes it highly adaptable to large-scale production.

[0030] 4. Fully adjustable and widely adaptable to various working conditions: It can achieve precise adjustment of slurry flow rate, slurry application position, slurry application angle, squeegee height, and squeegee thickness in multiple dimensions, and can adapt to the processing needs of ring cake bases with different diameters and thicknesses as well as baking slurries with different viscosities, making it extremely versatile.

[0031] 5. Automatic cleaning and detachable structure for convenient and hygienic operation and maintenance: Equipped with a dedicated cleaning station and ultrasonic self-cleaning function, it can clean residual slurry in real time; at the same time, the slurry unit and cake stand can be quickly disassembled for deep cleaning and disinfection, preventing slurry drying and contamination, and meeting food processing hygiene standards.

[0032] 6. Adhesive-fitting, fixed-thickness scraping with excellent shaping effect: Adopting an axially coincident arc-shaped adhesive scraping structure, the entire area is scraped without dead angles, resulting in high surface flatness and uniform and stable thickness of the slurry. The standardized processing effect far exceeds that of manual operation.

[0033] This invention adopts a quantitative feeding and fixed thickness coating, ultrasonic defoaming and shaping, and dual-station alternating continuous operation structure, which solves the problems of uneven thickness, easy foaming, and low efficiency in traditional cake batter processing. It has the advantages of high processing precision, good finished product quality, wide adaptability, and convenient operation and maintenance, and is suitable for large-scale standardized food processing and production. Attached Figure Description

[0034] Figure 1 This is a schematic diagram of the main structure of the present invention; Figure 2 This is a bottom-view structural diagram of the present invention; Figure 3 This is a schematic diagram of the structure of the frame, vertical conical slurry hopper, and feeding hose in this invention; Figure 4 This is a bottom view of the frame, vertical conical slurry hopper, feeding hose, metal pipe, solenoid valve, and slurry pump in this invention. Figure 5 This is a schematic diagram of the slurry distribution mechanism in this invention; Figure 6 This is a bottom view of the slurry distribution mechanism in this invention. Figure 7 This is a schematic diagram of the workstation conversion mechanism and the ring-shaped cake stand in this invention; Figure 8 This is a bottom view of the workstation conversion mechanism and the ring-shaped cake stand in this invention. Figure 9 This is an exploded structural diagram of the workstation conversion mechanism and the ring-shaped cake stand in this invention; Figure 10 This is an exploded bottom view of the workstation conversion mechanism and the ring cake stand in this invention. Figure 11 This is a schematic diagram of the thickness-fixed coating mechanism in this invention; Figure 12 This is a schematic diagram of the structure of the first stepper motor, the first rotating shaft, the telescopic groove, the telescopic hexagonal rod, the height adjustment plate, and the connector in this invention. Figure 13 This is a schematic diagram of the coating unit in this invention; Figure 14 This is a bottom view of the coating unit in this invention. Figure 15 This is an internal structural diagram of the coating unit in this invention.

[0035] The components include: 1. Frame; 2. Vertical conical slurry hopper; 21. Feed hose; 22. Metal pipe; 221. Flow solenoid valve; 23. Slurry pump; 3. Slurry distribution mechanism; 31. Support platform; 32. Electric cylinder; 33. Pipe fixing parts; 34. Locking screws; 35. Bend; 351. Sealing groove; 36. Slurry distribution port; 4. Cleaning box; 5. Thickness-fixed coating mechanism; 51. First stepper motor; 52. First rotating shaft; 521. Telescopic groove; 53. Telescopic hexagonal rod; 54. Height adjustment plate; 55. Connector; 551. Positioning groove; 56. Coating unit; 561. Coating plate; 562. Arc-shaped surface; 563. Electrical control box; 564. Mounting block; 565. Connector groove; 567. Positioning bolt; 568. Ultrasonic transducer; 57. Electric push rod; 6. Workstation switching mechanism; 61. Second stepper motor; 62. Second rotary shaft; 63. Support plate; 64. Servo motor; 65. Drive gear; 66. Driven gear; 67. Round shaft; 68. Magnetic hexagonal rod; 7. Circular cake stand; 71. Center rod; 72. Hexagonal groove. Detailed Implementation

[0036] To make the technical means, creative features, and achieved objectives and effects of this invention easier to understand, the invention is further described below with reference to specific embodiments. However, the following embodiments are merely preferred embodiments of this invention and not all of them. Other embodiments obtained by those skilled in the art based on the embodiments described herein without creative effort are all within the protection scope of this invention. Unless otherwise specified, the experimental methods in the following embodiments are conventional methods, and the materials and reagents used in the following embodiments are commercially available unless otherwise specified.

[0037] Example 1

[0038] like Figures 1-15As shown, this invention provides a thickness-fixed coating device for a ring-shaped cake base surface batter, including a frame 1. A vertical conical batter hopper 2 is fixedly installed on the top of the frame 1. A batter supply mechanism is connected to the bottom of the vertical conical batter hopper 2. The output end of the batter supply mechanism is connected to a feeding hose 21, and the end of the feeding hose 21 is connected to a batter distribution mechanism 3. The device also includes a station conversion mechanism 6 and a thickness-fixed coating mechanism 5. The station conversion mechanism 6 is mounted on the frame 1. The transmission end of the station conversion mechanism 6 is connected to two symmetrically arranged ring-shaped cake stands 7. The batter distribution mechanism 5... Mechanism 3 is aligned and adapted to the circular cake stand 7, and a central rod 71 is fixedly installed at the top of the circular cake stand 7; the thickness-fixed coating mechanism 5 is set on the top of the frame 1, and the thickness-fixed coating mechanism 5 includes a coating adjustment unit and a coating unit 56. The coating adjustment unit is fixedly installed on the top of the frame 1, and the coating unit 56 is fixedly connected to the movable end of the coating adjustment unit; a cleaning box 4 is fixedly installed on the top of the frame 1 corresponding to the working stroke position of the coating unit 56. The cleaning box 4 is aligned and cooperates with the coating unit 56 and is used to receive the slurry and wash and clean the coating unit 56 after the operation is completed.

[0039] Specifically, this device automates the coating process of ring-shaped cake bases, achieving consistent thickness and uniform slurry application. It integrates automatic feeding, precise flow control, rotary slurry application, dual-station alternating operation, ultrasonic slurry application with consistent thickness, and automatic cleaning functions. Through alternating loading and unloading of materials and slurry application on a dual-station ring-shaped cake table, uninterrupted continuous production is achieved. The duckbill-style flat slurry outlet structure, combined with flow control, ensures consistent slurry thickness application. Combined with an arc-shaped, conforming slurry application structure and ultrasonic defoaming function, it effectively solves the problems of uneven slurry thickness, numerous surface bubbles, poor flatness, low production efficiency, and poor product consistency associated with traditional manual slurry application, significantly improving the precision of ring-shaped cake base slurry processing and the quality of the finished product.

[0040] like Figure 2 , Figure 4 As shown, the slurry supply mechanism includes a slurry pump 23, which is installed at the bottom of the frame 1. The inlet of the slurry pump 23 is connected to the bottom of the vertical conical slurry hopper 2 by the same metal pipe 22. A flow solenoid valve 221 is installed on the metal pipe 22. The outlet of the slurry pump 23 is connected to the feed hose 21.

[0041] Specifically, the vertical conical slurry hopper 2 is used to store baking slurry, and the conical structure can prevent slurry accumulation and residue; the metal pipe 22 realizes stable slurry delivery, and the flow solenoid valve 221 can accurately control the slurry delivery flow rate, thereby matching the set coating thickness and realizing controllable and adjustable slurry coating thickness; the slurry pump 23 provides stable power for slurry delivery, and the feeding hose 21 has flexible adaptability and can follow the displacement of the slurry distribution mechanism 3 to adaptively bend, ensuring that dynamic feeding does not pull or leak.

[0042] like Figure 5 , Figure 6 As shown, the slurry distribution mechanism 3 includes a support platform 31, which is installed on the top of the frame 1. An electric cylinder 32 is installed on the top of the support platform 31. A pipe fixing component 33 is installed on the output shaft of the electric cylinder 32. A slot 331 is provided on the pipe fixing component 33. A bent pipe 35 is clamped in the slot 331. A sealing groove 351 is provided on the side of the bent pipe 35 near the feeding hose 21. The feeding hose 21 is rotatably sealed to the bent pipe 35 through the sealing groove 351. A duckbill slurry distribution port 36 is inclinedly provided at the end of the bent pipe 35 near the annular cake stand 7. The duckbill slurry distribution port 36 is a flat duckbill structure.

[0043] Specifically, the support platform 31 provides a stable mounting base for the electric cylinder 32, which can drive the pipe fixing component 33 to extend and retract back and forth, precisely adjusting the slurry distribution position and spraying distance of the duckbill slurry distribution port 36; the bent pipe 35 is snapped in place and easy to install and remove, and the flat duckbill structure at the end can extend the linear slurry into a uniform surface, ensuring that the slurry is initially evenly distributed on the cake base surface; the rotary sealing connection structure can be adapted to angle adjustment, preventing slurry leakage throughout the process.

[0044] like Figure 5 , Figure 6 As shown, the top of the pipe fixing component 33 is provided with a screw hole, and a locking screw 34 is connected to the screw hole. The bend 35 is locked and fixed by the locking screw 34.

[0045] Specifically, the locking screw 34 can lock and limit the bent tube 35 after it is snapped in, preventing the bent tube 35 from shifting, loosening, or deviating due to vibration during equipment operation, ensuring that the slurry spreading angle and position are accurate and constant, and ensuring the uniformity of slurry spreading. Loosening the locking screw 34 allows for manual fine adjustment of the tilt angle of the bent tube 35 to adapt to the slurry spreading needs of different sized cake bases.

[0046] like Figures 7-10 As shown, the workstation conversion mechanism 6 includes a second stepper motor 61, which is installed at the bottom of the frame 1. A second rotating shaft 62 is installed on the output shaft of the second stepper motor 61. The second rotating shaft 62 is vertically rotatably mounted on the frame 1 via bearings. The top end of the second rotating shaft 62 is located above the frame 1 and is equipped with a support plate 63. Both ends of the support plate 63 are rotatably mounted with round shafts 67. Magnetic hexagonal rods 68 are fixedly installed at the top ends of the two round shafts 67. Hexagonal slots 72 are opened at the bottom of the two annular cake tables 7. The two magnetic hexagonal rods 68 are attracted and engaged with the two hexagonal slots 72.

[0047] Specifically, the second stepper motor 61 can drive the support plate 63 to rotate precisely and change direction, so that the two sets of ring cake tables 7 can rotate 180° to exchange work positions, and complete the uninterrupted rotation of feeding, spreading, scraping and unloading operations, which greatly improves production efficiency; the magnetic hexagonal rod 68 and the hexagonal groove 72 are magnetically attracted to each other, which makes the positioning precise and the disassembly and assembly convenient, making it easy to disassemble, clean and replace the cake table for maintenance. At the same time, it can drive the cake table to rotate synchronously to meet the needs of rotating slurry mixing and rotating slurry scraping operations.

[0048] like Figures 7-10 As shown, the workstation conversion mechanism 6 also includes two servo motors 64, both of which are mounted on the top of the frame 1. Drive gears 65 are fixedly mounted on the output shafts of the two servo motors 64, and driven gears 66 are fixedly mounted on the bottom ends of the two round shafts 67. The two drive gears 65 mesh with the two driven gears 66.

[0049] Specifically, the servo motor 64 drives the round shaft 67 to rotate precisely through gear meshing, providing stable and uniform rotational power for the ring cake stand 7, ensuring that the cake base rotates evenly. Combined with the duckbill spout and scraping structure, it achieves uniform spout distribution and fixed-thickness scraping throughout the entire area, eliminating the problem of uneven spout thickness in some areas.

[0050] like Figures 11-15 As shown, the thickness-fixed coating mechanism 5 includes a first stepper motor 51, which is installed at the bottom of the frame 1. A first rotating shaft 52 is installed on the output shaft of the first stepper motor 51. The first rotating shaft 52 is vertically rotatably mounted on the frame 1 via bearings. A telescopic groove 521 is provided at the top of the first rotating shaft 52. A telescopic hexagonal rod 53 is slidably installed in the telescopic groove 521. A height adjustment plate 54 is installed at the outer end of the telescopic hexagonal rod 53. A connector 55 is installed on the height adjustment plate 54. A coating unit 56 is assembled on the connector 55.

[0051] Specifically, the first stepper motor 51 can drive the first rotating shaft 52 to rotate horizontally, realizing the switching between the working station and the cleaning station of the coating unit 56; the telescopic hexagonal rod 53 can extend and retract vertically to adjust the working height of the coating unit 56 precisely, adapting to the process requirements of cake bases of different thicknesses and coating thicknesses; the hexagonal sliding structure has anti-rotation limit, ensuring smooth lifting and precise positioning, and guaranteeing stable coating accuracy.

[0052] like Figures 11-15 As shown, an electric push rod 57 is installed in the telescopic groove 521, and the output shaft of the electric push rod 57 is fixedly installed at the bottom end of the telescopic hexagonal rod 53.

[0053] Specifically, the electric push rod 57 provides precise power for the lifting and lowering of the telescopic hexagonal rod 53, enabling micro-precision lifting and lowering adjustment, and precisely controlling the pressing depth of the scraping unit 56, thereby precisely controlling the thickness of the slurry scraping and achieving fixed thickness processing.

[0054] like Figures 13-15 As shown, the coating unit 56 includes a coating plate 561, which has an n-shaped structure. Both sides of the coating plate 561 are arc-shaped and coincide with the axis of the central rod 71. An arc-shaped surface 562 is provided on the inner side of the coating plate 561. An electrical control box 563 is installed on the top of the coating plate 561, and an ultrasonic transducer 568 is provided inside the electrical control box 563.

[0055] Specifically, the n-shaped scraper 561 can be perfectly fitted onto the outside of the ring-shaped cake base, and the arc-shaped surface 562 can be precisely fitted with the outer circle of the cake base. With rotation, it can achieve uniform thickness and smoothing throughout the entire area. The built-in ultrasonic transducer 568 can generate high-frequency ultrasonic waves during the scraping process to vibrate and defoam the slurry, eliminate surface bubbles and pinholes, and improve the smoothness of the slurry surface and the fineness of the finished product.

[0056] like Figures 13-15 As shown, an installation block 564 is installed on the top of the electrical control box 563. The installation block 564 has a plug-in groove 565, and the plug-in 55 has a positioning groove 551. The top of the installation block 564 has a bolt hole, and a positioning bolt 567 is threaded into the bolt hole. The positioning bolt 567 cooperates with the positioning groove 551 to fix the plug-in 55 in the plug-in groove 565.

[0057] Specifically, it adopts a detachable structure with plug-in and bolt locking, which ensures stable assembly and precise positioning. At the same time, the scraping unit 561 can be quickly disassembled, which is convenient for daily cleaning, maintenance and replacement, and avoids the slurry residue from drying and affecting the accuracy of subsequent processing.

[0058] Working Principle: Equipment Pre-assembly and Station Assembly: Before operation, connect the equipment to the power supply and control system, and pre-store the processing slurry inside the vertical conical slurry hopper 2. Align and insert the hexagonal groove 72 at the bottom of the ring cake stand 7 into the magnetic hexagonal rod 68 at the top of the support plate 63, and achieve quick positioning and assembly by magnetic attraction. The two sets of ring cake stands 7 are arranged symmetrically. Place the ring cake base to be processed on the top of the ring cake stand 7, so that the center rod 71 passes through the center hole of the ring cake base, and complete the positioning and fixing of the base.

[0059] Automatic quantitative feeding and uniform slurry distribution: After the equipment is started, the slurry pump 23 begins to work. The slurry is conveyed from the vertical conical slurry hopper 2 through the metal pipe 22. The slurry delivery flow rate is adjusted in real time by the flow solenoid valve 221 to accurately match the preset coating thickness. The quantitative slurry is sent from the slurry pump 23 and the feeding hose 21 into the curved pipe 35, and finally discharged flat from the inclined duckbill slurry distribution port 36, and evenly coated on the top surface of the ring cake base. At the same time, the servo motor 64 of the corresponding station starts, and through the drive gear 65 meshing with the passive gear 66, it drives the circular shaft 67 and the ring cake platform 7 to rotate at a uniform speed, so that the slurry output from the duckbill port is evenly spread over the entire top surface of the cake base, achieving uniform slurry distribution without dead corners.

[0060] Adjustment of the position and angle of the slurry application: During operation, the electric cylinder 32 can be extended and retracted to move the pipe fixing part 33 and the bend 35 back and forth as a whole, so as to precisely adjust the radial distance between the duckbill slurry distribution port 36 and the cake base, and adapt to the slurry application requirements of cake bases with different diameters; loosening the locking screw 34 can manually fine-tune the tilt angle between the bend 35 and the duckbill slurry distribution port 36, change the slurry spray landing point and spreading angle, and adapt to the uniform spreading of slurry with different viscosity. After adjustment, tightening the locking screw 34 can lock and fix it.

[0061] Dual-station alternating operation switching: After the single-station slurry application is completed, the flow solenoid valve 221 is closed, the slurry pump 23 stops supplying material, and the electric cylinder 32 drives the slurry discharge structure to retract and make way, reserving space for the station to rotate. Subsequently, the second stepper motor 61 drives the second rotating shaft 62 and the support plate 63 to rotate 180°, realizing the exchange of positions between the slurry-applied station and the empty station. The empty station switches to the slurry application area to continue the next batch of cake base slurry application, and the slurry-applied station switches to the scraping area, realizing uninterrupted alternating production and greatly improving processing efficiency.

[0062] Thickness coating and ultrasonic defoaming and shaping: After rotation, the coating unit 56 starts operation. The electric push rod 57 drives the telescopic hexagonal rod 53 to slide downward, causing the height adjustment plate 54 and the coating plate 561 to descend precisely, so that the n-shaped coating plate 561 is fitted on the outside of the ring cake base, and the arc surface 562 is precisely in contact with the surface of the cake base slurry. At the same time, the ring cake platform 7 supporting the cake base maintains a uniform rotation speed. Relying on the limiting and leveling effect of the arc surface 562, the slurry on the surface of the cake base is coated with a fixed thickness and leveled and shaped. During the coating process, the ultrasonic transducer 568 works continuously, generating high-frequency ultrasonic waves to vibrate and defoam the flowing slurry, completely eliminating air bubbles inside the slurry and pinholes on the surface, so that the formed slurry layer is delicate, flat and uniform in thickness.

[0063] Automatic Reset and Cleaning Operation: After the single-cake coating is completed, the electric push rod 57 drives the coating plate 561 to rise and detach from the cake base; the first stepper motor 51 drives the first rotating shaft 52 to rotate, rotating the entire coating unit 56 to directly above the cleaning box 4. The cleaning box 4 can hold cleaning water, controlling the coating plate 561 to descend and immerse itself in the water. With the ultrasonic vibration function of the ultrasonic transducer 568, the residual slurry on the surface of the coating plate 561 is ultrasonically cleaned. After cleaning, it is raised to control the water, completing a single operation cycle and preventing the residual slurry from drying and affecting the accuracy of subsequent processing.

[0064] Disassembly and maintenance cleaning principle: After long-term use of the equipment, the positioning bolt 567 can be loosened, and the scraping unit 56 can be directly pulled out from the insertion slot 565 of the connector 55 to achieve independent disassembly and deep cleaning; at the same time, the ring cake plate 7 can be directly lifted upward to overcome the magnetic attraction and complete the disassembly, which is convenient for separate cleaning, disinfection and replacement. The equipment is easy to maintain and has good hygiene.

[0065] Example 2

[0066] This embodiment is a further optimization based on Embodiment 1. The parts that are the same as those in the aforementioned technical solution will not be repeated here. In order to better realize the present invention, the following configuration is adopted: the arc-shaped working surface 562 of the scraper plate 561 is provided with dense microporous air passages. The microporous air passages uniformly penetrate the entire arc-shaped working surface. The side of the scraper plate 561 is fixedly embedded with an annular high-pressure air chamber. The annular high-pressure air chamber is connected to all the microporous air passages. A miniature high-pressure air supply pump is fixedly installed on the height adjustment plate 54. The miniature high-pressure air supply pump is sealed and connected to the annular high-pressure air chamber through a high-pressure air pipe. A high-frequency airflow regulating valve is installed on the high-pressure air pipe.

[0067] Furthermore, the air outlet micropores of the microporous air passage are arranged at an oblique angle, and the airflow is sprayed obliquely in the direction of the scraping advance, which can form a continuous and uniform ultra-thin high-pressure air cushion isolation layer between the arc-shaped working surface and the slurry surface; the high-pressure air supply pump can dynamically adjust the air pressure according to the viscosity of the slurry to adapt to the anti-sticking requirements of different types of slurries.

[0068] The working principle and technical advantages of this invention: In traditional coating operations, the scraper and the batter are in direct, rigid contact. High-sugar, high-oil, and high-viscosity baking batters easily adhere to the scraper surface. Continuous operation leads to material accumulation, skin formation, and stringing. During the coating process, accumulated material randomly falls onto the cake base surface, resulting in defects such as particle blemishes, scratches, and uneven thickness. Existing solutions only involve stopping the machine for water washing and ultrasonic cleaning after the operation, which is a passive, post-operation cleaning method. It cannot achieve real-time anti-sticking during the operation, resulting in a continuously decreasing yield rate during continuous production. At the same time, frequent machine shutdowns for cleaning significantly reduce production efficiency.

[0069] This structure adopts an original air-film isolation non-contact coupling scraping principle, which completely subverts the traditional solid-liquid direct contact scraping mode: throughout the scraping operation, a micro high-pressure air pump continuously supplies air to the high-pressure air chamber. The airflow is obliquely sprayed through the full-area microporous air channel, continuously forming a micron-level uniform high-pressure air film between the arc-shaped working surface of the scraper and the surface of the flowing slurry, completely isolating the scraper and the slurry, preventing the slurry from directly adhering to the board surface, and achieving real-time anti-sticking, zero material accumulation, and zero drag during the operation.

[0070] Meanwhile, the oblique airflow can slightly smooth and even out the surface slurry, helping to eliminate microscopic ripples and further improving surface smoothness. The air film pressure can be intelligently adjusted according to the slurry viscosity, with low pressure to prevent overflow for thin slurries and high pressure to isolate for thick slurries, making it suitable for all types of baking slurries. This technology abandons the industry's inherent "post-process cleaning" approach and achieves a breakthrough in proactive anti-sticking technology, achieving "cleanliness during operation." Its structural principle is novel and its technological innovation is extremely strong.

[0071] Although embodiments of the invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the invention, the scope of which is defined by the appended claims and their equivalents.

Claims

1. A thickness-fixed coating device for a ring-shaped cake base surface batter, comprising a frame (1), wherein a vertical conical batter hopper (2) is mounted on the top of the frame (1), and a batter supply mechanism is connected to the bottom of the vertical conical batter hopper (2), and a feeding hose (21) is connected to the batter supply mechanism, characterized in that: The feeding hose (21) is connected to a slurry distribution mechanism (3), and also includes: The workstation conversion mechanism (6) is installed on the frame (1). Two ring cake tables (7) are connected to the workstation conversion mechanism (6). The slurry distribution mechanism (3) is adapted to the ring cake table (7). A center rod (71) is installed on the top of the ring cake table (7). A thickness-fixed coating mechanism (5) is set on the top of the frame (1). The thickness-fixed coating mechanism (5) includes a coating adjustment unit and a coating unit (56). The coating adjustment unit is installed on the top of the frame (1). The coating unit (56) is connected to the coating adjustment unit. A cleaning box (4) is provided on the top of the frame (1). The coating unit (56) cooperates with the cleaning box (4). The cleaning box (4) is used to clean the coating unit (56).

2. The device for applying a fixed-thickness coating of batter to the surface of a ring-shaped cake base according to claim 1, characterized in that, The slurry supply mechanism includes a slurry pump (23), which is installed at the bottom of the frame (1). The inlet of the slurry pump (23) is connected to the bottom of the vertical conical slurry hopper (2) by the same metal pipe (22). A flow solenoid valve (221) is provided on the metal pipe (22). The outlet of the slurry pump (23) is connected to the feed hose (21).

3. The device for applying a fixed-thickness coating of batter to the surface of a ring-shaped cake base according to claim 1, characterized in that, The slurry distribution mechanism (3) includes a support platform (31), which is installed on the top of the frame (1). An electric cylinder (32) is installed on the top of the support platform (31). A pipe fixing component (33) is installed on the output shaft of the electric cylinder (32). A slot (331) is provided on the pipe fixing component (33). A bent pipe (35) is clamped in the slot (331). A sealing groove (351) is provided on the side of the bent pipe (35) near the feeding hose (21). The feeding hose (21) is rotatably sealed to the bent pipe (35) through the sealing groove (351). A duckbill slurry distribution port (36) is inclined at the end of the bent pipe (35) near the annular cake stand (7). The duckbill slurry distribution port (36) is a flat duckbill structure.

4. The device for applying a fixed-thickness coating of batter to the surface of a ring-shaped cake base according to claim 3, characterized in that, The top of the pipe fastener (33) is provided with a screw hole, and a locking screw (34) is connected to the screw hole. The bend (35) is locked and fixed by the locking screw (34).

5. The device for applying a fixed-thickness coating of batter to the surface of a ring-shaped cake base according to claim 1, characterized in that, The workstation conversion mechanism (6) includes a second stepper motor (61), which is installed at the bottom of the frame (1). A second rotating shaft (62) is installed on the output shaft of the second stepper motor (61). The second rotating shaft (62) is vertically rotated on the frame (1) through a bearing. The top of the second rotating shaft (62) is located above the frame (1) and is equipped with a support plate (63). Both ends of the support plate (63) are rotatably mounted with round shafts (67). The top ends of the two round shafts (67) are fixedly mounted with magnetic hexagonal rods (68). The bottom of the two annular cake tables (7) is provided with hexagonal slots (72). The two magnetic hexagonal rods (68) are attracted and engaged with the two hexagonal slots (72).

6. The device for applying a fixed-thickness coating of a slurry to the surface of a ring-shaped cake base according to claim 5, characterized in that, The workstation conversion mechanism (6) also includes two servo motors (64), both of which are mounted on the top of the frame (1). Drive gears (65) are fixedly mounted on the output shafts of both servo motors (64), and passive gears (66) are fixedly mounted on the bottom ends of both round shafts (67). The two drive gears (65) mesh with the two passive gears (66).

7. The device for applying a fixed-thickness coating of batter to the surface of a ring-shaped cake base according to claim 1, characterized in that, The thickness coating mechanism (5) includes a first stepper motor (51), which is installed at the bottom of the frame (1). A first rotating shaft (52) is installed on the output shaft of the first stepper motor (51). The first rotating shaft (52) is vertically rotated on the frame (1) through a bearing. A telescopic groove (521) is provided at the top of the first rotating shaft (52). A telescopic hexagonal rod (53) is slidably installed in the telescopic groove (521). A height adjustment plate (54) is installed at the outer end of the telescopic hexagonal rod (53). A connector (55) is installed on the height adjustment plate (54).

8. The device for applying a fixed-thickness coating of batter to the surface of a ring-shaped cake base according to claim 7, characterized in that, An electric push rod (57) is installed inside the telescopic groove (521), and the output shaft of the electric push rod (57) is fixedly installed at the bottom end of the telescopic hexagonal rod (53).

9. The device for applying a fixed-thickness coating of batter to the surface of a ring-shaped cake base according to claim 7, characterized in that, The connector (55) is equipped with a scraping unit (56), which includes a scraping plate (561). The scraping plate (561) has an n-shaped structure. Both sides of the scraping plate (561) are arc-shaped and coincide with the axis of the central rod (71). An arc-shaped surface (562) is provided on the inner side of the scraping plate (561). An electrical control box (563) is installed on the top of the scraping plate (561). An ultrasonic transducer (568) is provided inside the electrical control box (563).

10. A thickness-fixed coating device for a ring-shaped cake base surface slurry according to claim 9, characterized in that, The top of the electrical control box (563) is equipped with a mounting block (564), the mounting block (564) is provided with a plug groove (565), the plug (55) is provided with a positioning groove (551), the top of the mounting block (564) is provided with a bolt hole, the bolt hole is threaded with a positioning bolt (567), the positioning bolt (567) cooperates with the positioning groove (551) to fix the plug (55) in the plug groove (565).

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