Coating apparatus, coating apparatus control method, and coater

Abstract

The application discloses a coating device, a coating device control method and a coating machine. The coating device comprises a coating die assembly and two groups of back rollers. One group of the back rollers is located on one side of the coating die assembly, and the other group of the back rollers is located on the other side of the coating die assembly. At least one group of the back rollers is provided with a moving driving mechanism. The moving driving mechanism can drive the back rollers to move relative to the coating die assembly to adjust the interval between the back rollers and the coating die assembly. When only one group of the back rollers is provided with the moving driving mechanism, the coating die assembly is arranged to be position-adjustable. When both groups of the back rollers are provided with the moving driving mechanism, the coating die assembly is arranged to be position-adjustable or fixedly arranged on a rack. Through the above arrangement, the distance between the coating die assembly and the two groups of back rollers can be independently adjusted, and different double-sided coating requirements can be met.

Description

Technical Field

[0001] This invention relates to the field of coating equipment technology, and in particular to a coating apparatus, a coating apparatus control method, and a coating machine. Background Technology

[0002] Coating is a process of spreading and adhering a material with specific functions onto the surface of a substrate. A coating die consists of an upper die and a lower die connected together, with a discharge slit formed between the upper and lower dies. The end of the slit connects to the external environment, forming a lip. The lip outputs the coating liquid onto the substrate that passes around the back roller. To achieve simultaneous coating of two opposite surfaces of the substrate, lips can be provided on both sides of the coating die, with the lips of the two coating dies facing opposite directions. Back rollers are set at the positions of the two lips. Although this saves the overall space occupied by the coating die, if the coating gap between the coating die and one of the back rollers is adjusted by moving the coating die, the coating gap between the coating die and the other back roller is also affected. This results in a problem where the coating gap of the coating die, which is used to output slurry to both sides simultaneously, is not adjustable. Summary of the Invention

[0003] The present invention aims to at least solve one of the technical problems existing in the prior art. To this end, the present invention proposes a coating device capable of adjusting the coating gap on both sides of the coating die head.

[0004] The present invention also proposes a method for controlling a coating apparatus.

[0005] The present invention also proposes a coating machine.

[0006] According to a first aspect of the present invention, a coating apparatus includes: a coating die assembly and two sets of back rollers, wherein one set of the back rollers is located on one side of the coating die assembly and the other set of the back rollers is located on the other side of the coating die assembly; at least one set of the back rollers is provided with a movement drive mechanism, the movement drive mechanism being capable of driving the back rollers to move relative to the coating die assembly to adjust the interval between the back rollers and the coating die assembly; wherein, when only one set of the back rollers is provided with a movement drive mechanism, the coating die assembly is configured to be position-adjustable; when both sets of the back rollers are provided with movement drive mechanisms, the coating die assembly is configured to be position-adjustable or fixedly mounted on a frame.

[0007] The coating apparatus according to embodiments of the present invention has at least the following beneficial effects: the distance between the coating die assembly and the two sets of back rollers can be adjusted independently.

[0008] According to some embodiments of the present invention, the moving drive mechanism includes a drive member disposed on the frame, a movable seat movably disposed on the frame, a back roller disposed on the movable seat, the drive member being capable of driving the movable seat to move so that the back roller moves away from or closer to the coating die assembly, and the movable seat being configured with a displacement detection component.

[0009] The coating apparatus further includes a control module, which is electrically connected to the drive component and the displacement detection component. The displacement detection component can detect the displacement of the moving seat relative to the frame or the coating die assembly and feed it back to the control module. The control module can control and change the force applied to the moving seat by the drive component.

[0010] According to some embodiments of the present invention, the driving member acts on the movable seat through a push rod, and a pressure sensor is provided between the push rod and the movable seat. The pressure sensor is electrically connected to the control module and can detect the force between the push rod and the movable seat.

[0011] According to some embodiments of the present invention, the driving member acts on the movable seat via a push rod, and the push rod is movably connected to the movable seat.

[0012] According to some embodiments of the present invention, the movable seat is provided with a connector, the connector having a connecting cavity, the connecting cavity having an open structure on the side facing the push rod, the end of the push rod being able to be inserted into the connecting cavity, the connecting cavity being able to restrict the push rod from exiting the connecting cavity along its axial direction, and the end of the push rod being able to move axially and vertically along the radial direction of the push rod within the connecting cavity.

[0013] According to some embodiments of the present invention, a telescopic connector is provided between the movable seat and the frame. The telescopic direction of the telescopic connector is parallel to the moving direction of the movable seat, and both ends of the telescopic connector are respectively hinged to the frame and the movable seat. The telescopic connector applies a force to the movable seat in a direction away from or towards the coating die assembly.

[0014] According to some embodiments of the present invention, the coating die assembly includes an upper die assembly and a lower die assembly, wherein the lower die assembly includes a first lower die and a second lower die; wherein,

[0015] The upper mold assembly includes two upper mold heads that correspond to the first lower mold and the second lower mold, respectively.

[0016] or,

[0017] The upper mold assembly is a single mold head corresponding to the first lower mold and the second lower mold.

[0018] According to a second aspect of the present invention, a coating apparatus control method is applied to the above-described coating apparatus, comprising: detecting the displacement of the movable seat relative to the frame or the coating die assembly by the displacement detection component and feeding back the detection result to the control module; when the detection result remains unchanged for a preset time period, the control module adjusts the force applied to the movable seat by the driving component based on the received detection result of the displacement detection component, so that the movable seat moves relative to the coating die assembly, thereby causing the detection result of the displacement detection component to return to a preset interval value.

[0019] The coating apparatus control method according to embodiments of the present invention has at least the following beneficial effects: by detecting the displacement of the moving seat relative to the frame or the coating die assembly by the displacement detection component and feeding it back to the control module, the force applied to the moving seat by the adjustment drive component is controlled and adjusted, which is beneficial to accurately adjust the gap between the control back roller and the coating die assembly, thereby keeping the coating gap accurate and constant, which is convenient for production applications.

[0020] According to some embodiments of the present invention, the driving member acts on the movable seat through a push rod. A pressure sensor is provided between the push rod and the movable seat. The pressure sensor is electrically connected to the control module. The pressure sensor detects the force between the push rod and the movable seat and feeds back the detection result to the control module. Based on the received detection result from the pressure sensor, the control module adjusts the force applied to the movable seat by the driving member, determines the areal density of the film material, and marks the positions where the areal density of the film material exceeds a preset range.

[0021] According to a third aspect of the present invention, a coating machine includes a coating apparatus as described in any of the above embodiments.

[0022] The coating machine according to embodiments of the present invention has at least the following beneficial effects: the coating gap on both sides of the coating die head can be adjusted by moving the back roller and / or the coating die head. Attached Figure Description

[0023] The present invention will be further described below with reference to the accompanying drawings and embodiments, wherein:

[0024] Figure 1 This is a schematic diagram of the coating die assembly and back roller according to an embodiment of the present invention;

[0025] Figure 2 This is a schematic diagram of the coating apparatus according to an embodiment of the present invention;

[0026] Figure 3 for Figure 2 An enlarged schematic diagram of part A in the middle;

[0027] Figure 4 This is a cross-sectional structural schematic diagram of a first embodiment of the coating die assembly of the present invention;

[0028] Figure 5 This is a cross-sectional structural schematic diagram of a second embodiment of the coating die assembly of the present invention;

[0029] Figure 6 This is a cross-sectional structural schematic diagram of a third embodiment of the coating die assembly of the present invention;

[0030] Figure 7 This is a schematic diagram of the structure of a fourth embodiment of the coating die assembly of the present invention;

[0031] Figure 8 This is a side view of a fourth embodiment of the coating die assembly of the present invention.

[0032] Figure 9 This is a schematic diagram of the side structure of the coating die assembly of the present invention when it is opened, according to Embodiment 4.

[0033] Figure 10 This is a schematic diagram of the structure of a fifth embodiment of the coating die assembly of the present invention;

[0034] Figure 11 This is a front view of a fifth embodiment of the coating die assembly of the present invention;

[0035] Figure 12 This is a front view of the coating die assembly of the present invention when opened, according to Embodiment 5.

[0036] Figure 13 This is a schematic diagram illustrating the structural principle of a first embodiment of the coating machine of the present invention;

[0037] Figure 14 This is a schematic diagram illustrating the structural principle of a second embodiment of the coating machine of the present invention.

[0038] Icon labels:

[0039] Coating die head assembly 100, lip 101, upper die assembly 110, upper mold head 111, lower die assembly 120, first lower die 121, second lower die 122;

[0040] Back roller 200, drive component 210, push rod 211, connecting head 212, moving seat 220, connector 221, connecting cavity 222, pressure sensor 230, displacement detection assembly 240, hydraulic balance cylinder 250;

[0041] The machine frame is 900, the first drying oven is 910, the second drying oven is 920, the unwinding device is 930, the winding device is 940, and the rear drying oven is 950. Detailed Implementation

[0042] Embodiments of the present invention are described in detail below. Examples of these embodiments are shown in the accompanying drawings, wherein the same or similar reference numerals denote the same or similar elements or elements having the same or similar functions throughout. The embodiments described below with reference to the accompanying drawings are exemplary and are only used to explain the present invention, and should not be construed as limiting the present invention.

[0043] In the description of this invention, it should be understood that the orientation descriptions, such as left, right, etc., are based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing this invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limiting this invention.

[0044] In the description of this invention, the use of "first" and "second" is for the purpose of distinguishing technical features only, and should not be construed as indicating or implying relative importance or implicitly indicating the number of technical features indicated or the order of the technical features indicated.

[0045] In the description of this invention, unless otherwise explicitly defined, terms such as "set up," "install," and "connect" should be interpreted broadly, and those skilled in the art can reasonably determine the specific meaning of the above terms in this invention in conjunction with the specific content of the technical solution.

[0046] In related technologies, a double-sided coating die head is provided with lips on both sides for outputting coating liquid. Two sets of back rollers are respectively arranged on both sides of the coating die head and correspond to the positions of the lips. When the substrate passes over the two sets of back rollers, its two sides correspond to the two lips respectively, so that the two lips output the coating liquid to the two sides of the substrate, thereby realizing double-sided coating operation. If the coating gap between the coating die head and one of the back rollers is adjusted by moving the coating die head, the coating gap between the coating die head and the other back roller is also affected. Therefore, there is a problem that the coating gap of the coating device on both sides of the coating die head is difficult to adjust.

[0047] The following is for reference. Figures 1 to 12 A coating apparatus according to an embodiment of the present invention is described.

[0048] According to a specific embodiment of the first aspect of the present invention, a coating apparatus includes: a coating die assembly 100 and two sets of back rollers 200, wherein one set of back rollers 200 is located on one side of the coating die assembly 100 and the other set of back rollers 200 is located on the other side of the coating die assembly 100. At least one set of back rollers 200 is provided with a moving drive mechanism, which is capable of driving the back rollers 200 to move relative to the coating die assembly 100 to adjust the interval between the back rollers 200 and the coating die assembly 100. When only one set of back rollers 200 is provided with a moving drive mechanism, the coating die assembly 100 is configured to be position-adjustable. When both sets of back rollers 200 are provided with moving drive mechanisms, the coating die assembly 100 is configured to be position-adjustable or fixedly mounted on a frame 900.

[0049] Understandably, when only one set of back rollers 200 is equipped with a moving drive mechanism, the other back roller 200 is fixed in position on the frame 900, and the coating die assembly 100 is configured to be adjustable in position relative to the frame 900, such as by configuring a displacement drive mechanism. This allows the position of one set of back rollers 200 to be adjusted, thereby adjusting the position of the coating die assembly 100 and the spacing between the lips 101 on both sides of the coating die assembly 100 and the two sets of back rollers 200. When both sets of back rollers 200 are equipped with moving drive mechanisms, that is, when the positions of both sets of back rollers 200 on the frame 900 can be adjusted, the spacing between the lips 101 on both sides of the coating die assembly 100 and the two sets of back rollers 200 can be adjusted regardless of whether the coating die assembly 100 is configured to be adjustable in position relative to the frame 900 or is fixedly mounted on the frame 900.

[0050] The above-described structural design allows for independent adjustment of the distance between the coating die assembly 100 and the two sets of back rollers 200.

[0051] Specifically, such as Figure 1 , Figure 2 As shown, the coating die assembly 100 is fixed on the frame 900. Both sets of back rollers 200 are equipped with a moving drive mechanism. The coating interval on both sides of the coating die assembly 100 can be adjusted by adjusting the position of the two sets of back rollers 200.

[0052] It is conceivable that, in some embodiments of the present invention, the moving drive mechanism includes a drive member 210 disposed on the frame 900 and a movable seat 220 movably disposed on the frame 900. The back roller 200 is disposed on the movable seat 220. The drive member 210 can drive the movable seat 220 to move so that the back roller 200 moves away from or closer to the coating die assembly 100. The movable seat 220 is equipped with a displacement detection component 240. The coating apparatus also includes a control module, which is electrically connected to the drive member 210 and the displacement detection component 240 respectively. The displacement detection component 240 can detect the displacement of the movable seat relative to the frame 900 or the coating die assembly 100 and feed it back to the control module. The control module can control and change the force applied by the drive member to the movable seat to adjust the interval between the back roller 200 and the coating die assembly 100 to a preset interval value.

[0053] Specifically, such as Figure 1 , Figure 2 As shown, the displacement detection component 240 is used to detect the actual position of the moving seat 220 (or back roller 200). During operation, the back roller 200 is rotatably mounted on the moving seat 220. The driving force of the driving component 210 acts on the moving seat 220, allowing the back roller 200 to move away from or closer to the coating die assembly 100, thereby adjusting the gap between the back roller 200 and the coating die assembly 100. The preset interval value set in the control module, in conjunction with the displacement detection component 240, ensures that the gap between the back roller 200 and the coating die assembly 100 remains stable at the preset interval value under normal operating conditions. When the substrate area increases or due to the output of the coating die assembly 100... If the amount of slurry increases due to an error at a certain time, it will exert a squeezing force on the back roller 200, causing the back roller 200 to tend to move away from the coating die assembly 100. At this time, the coating gap will become wider than the preset interval value. The displacement detection component 240 will detect the displacement of the moving seat 220 and feed back the displacement of the moving seat 220 to the control module. The control module can control and change the force applied to the moving seat by the drive component according to the received displacement information of the moving seat 220, so that the back roller 200 moves closer to the substrate, thereby making the detection result of the displacement detection component 240 return to the preset value and maintaining the coating gap at the preset interval value.

[0054] It is conceivable that, in some embodiments of the present invention, the displacement detection component 240 may be a displacement sensor or a photoelectric sensor, etc., for detecting the displacement of the moving seat 220 relative to the frame 900 or the coating die assembly 100.

[0055] It is conceivable that in some embodiments of the present invention, the drive component 210 is a servo hydraulic cylinder, and the output pressure can be controlled by a servo control system. Of course, in specific implementation, the drive component 210 can also be a linear motor, a cylinder, or an electric push rod, etc.

[0056] It is conceivable that, in some embodiments of the present invention, the control module may be composed of an integrated circuit board, various control units, a display, etc. Since the specific composition of the control module in the embodiments of the present invention is known to those skilled in the art, it will not be described in detail here.

[0057] It is conceivable that in some embodiments of the present invention, the driving member 210 acts on the movable seat 220 through the push rod 211. A pressure sensor 230 is provided between the push rod 211 and the movable seat 220. The pressure sensor 230 is electrically connected to the control module and can detect the force between the push rod 211 and the movable seat 220. The driving force of the driving member 210 can be controlled according to the force feedback from the pressure sensor 230.

[0058] Specifically, such as Figure 2 , Figure 3 As shown, the drive component 210 is a servo hydraulic cylinder, whose force is output through the push rod 211 and acts on the moving seat 220. The pressure sensor 230 is set between the push rod 211 and the moving seat 220 and can detect the actual output force of the servo hydraulic cylinder. When the substrate area increases or the amount of slurry output by the coating die assembly 100 increases due to an error in a certain period of time, it will generate a squeezing force on the back roller 200. The pressure sensor 230 can know the reaction force on the back roller 200. On the one hand, the control module can adjust the force applied to the moving seat 220 by the drive component 210 in a timely manner according to the information of the back roller 200, which is conducive to maintaining a precise and constant coating gap. On the other hand, under the condition of the same coating gap and the same substrate thickness, the surface density of the substrate coating layer can be determined according to the different reaction forces given by the substrate. It can be understood that the greater the reaction force of the substrate, the greater the surface density, thereby obtaining the surface density information of the substrate coating layer, which is convenient for monitoring its quality.

[0059] In addition, the pressure sensor 230 can also detect the driving pressure of the servo hydraulic cylinder on the push rod in real time, and adjust the actual output pressure of the servo hydraulic cylinder more accurately.

[0060] It is conceivable that, in some embodiments of the present invention, the driving member 210 acts on the movable seat 220 through the push rod 211, and the push rod 211 and the movable seat 220 are movably connected to eliminate parallelism error.

[0061] Specifically, such as Figure 2As shown, the movable seat 220 is mounted on the frame 900 through the cooperation of the slide rail and slider. Because the coating process has high precision requirements, and the axial direction of the push rod 211 of the drive component 210 and the slide rail is difficult to ensure coaxiality in actual applications, in this invention, by setting the push rod 211 and the movable seat 220 to be movably connected, it is beneficial to reduce the processing error caused by the non-axial direction of the driving force and the actual moving direction of the movable seat 220.

[0062] It is conceivable that, in some embodiments of the present invention, the movable seat 220 is provided with a connector 221, the connector 221 having a connecting cavity 222, the connecting cavity 222 having an open structure on the side facing the push rod 211, the end of the push rod 211 being able to be placed into the connecting cavity 222, the connecting cavity 222 being able to restrict the push rod 211 from exiting the connecting cavity 222 along its axial direction, and the end of the push rod 211 being able to move axially and vertically along the radial direction of the push rod 211 within the connecting cavity 222, thereby effectively reducing machining errors caused by parallelism (or coaxiality).

[0063] like Figure 3 As shown, in some embodiments of the present invention, the connector 221 has a C-shaped structure to form a connecting cavity 222. The end of the push rod 211 is a connecting head 212. The connecting head 212 can be inserted into the connecting cavity 222 from the side. The C-shaped connector 221 can restrict the push rod 211 from exiting the connecting cavity 222 along its axial direction, and allow the end of the push rod 211 to move axially and vertically along the radial direction of the push rod 211 within the connecting cavity 222. Through the above structure, a rigid connection is not formed between the push rod 211 and the moving seat 220, and the normal driving of the moving seat 220 by the push rod 211 can be guaranteed.

[0064] Specifically, the opening of the C-shaped structure of the connector 221 is smaller than the outer contour of the connecting head 212, thus restricting its passage. The opening of the C-shaped structure of the connector 221 is larger than the rod size of the push rod 211, thus allowing the connecting head 212 to move up and down in the axial direction of the push rod 211 within the connector 221. The C-shaped structure of the connector 221 is larger than the outer contour of the connecting head 212, thus allowing the connecting head 212 to move axially and radially in the connecting member 221 within the connector 221. When the push rod 211 is not parallel to the slide rail, the moving seat 220 can still move normally along the extension direction of the slide rail without any misalignment or jamming. At this time, the control module can detect the actual displacement of the moving seat 220 based on the displacement detection component 240. When the push rod 211 is misaligned with the slide rail, the actual displacement of the moving seat 220, rather than the displacement of the push rod, can be used to fit the pressure required to be output by the servo hydraulic cylinder, thereby controlling the stroke of the moving seat 220.

[0065] In practical applications, in addition to the above structure, the movable connection between the movable seat 220 and the push rod 211 can also be achieved through a ball joint structure or a Hooke hinge structure, which can be changed according to the actual needs of use.

[0066] As can be imagined, in some embodiments of the present invention, a telescopic connector is provided between the movable seat 220 and the frame 900. The telescopic connector extends in a direction parallel to the moving direction of the movable seat 220, and both ends of the telescopic connector are hinged to the frame 900 and the movable seat 220, respectively. The telescopic connector applies a force to the movable seat 220 in a direction away from or close to the coating die assembly 100 to improve the stability of the movement of the back roller 200.

[0067] Specifically, the telescopic connector is a hydraulic balance cylinder 250, which is respectively set on the upper and lower parts of the movable seat 220. The driving component 210 is located in the middle of the movable seat 220. Since the push rod 211 and the movable seat 220 can move along the axial direction of the push rod 211, when the substrate passing through the coating gap becomes thinner, the back roller 200, which loses the reaction force of the film material, will have a tendency to suddenly move towards the substrate. This movement is caused by inertia and will generate an uncontrollable force on the substrate. At this time, the hydraulic balance cylinder 250 can play a restraining role on the back roller 200, preventing the back roller 200 from sliding unstablely due to inertia, thereby improving the stability of the back roller 200.

[0068] It is conceivable that telescopic connectors can also be pneumatic balance cylinders or gas springs, etc., which will not be discussed in detail here.

[0069] like Figures 7 to 12 As shown, in some embodiments of the invention, the coating die assembly 100 includes an upper die assembly 110 and a lower die assembly 120. The upper die assembly 110 is mounted on the frame 900 via a lifting mechanism. The lower die assembly 120 includes a first lower die 121 and a second lower die 122. A first discharge slit 131 is formed between the first lower die 121 and the upper die assembly 110, connecting to a lip 101 on one side of the upper die assembly 110. A second discharge slit 132 is formed between the second lower die 122 and the upper die assembly 110, connecting to a lip 101 on the other side of the upper die assembly 110. The sides of the first lower die 121 and the second lower die 122 that are offset from the lip 101 are rotatably connected to the upper die assembly 110.

[0070] During normal operation, the upper mold assembly 110 and the lower mold assembly 120 are in a closed state, and the paint is discharged from the lip 101 through the first discharge slit 131 and the second discharge slit 132. When cleaning or maintenance is required, such as... Figure 9 or Figure 12As shown, the upper mold assembly 110 is lifted by the lifting mechanism, and the first lower mold 121 and the second lower mold 122 swing around the rotating connection due to gravity, so that the inner cavity of the coating mold assembly 100 is opened. The inner cavity of the coating mold assembly 100 can be cleaned or maintained without removing the upper mold assembly 110 or the lower mold assembly 120, which makes cleaning or maintenance more convenient.

[0071] The first lower mold 121 and the second lower mold 122 are rotatably connected to the upper mold assembly 110 via hinges, rotating shaft mechanisms, etc.

[0072] It is conceivable that, in some embodiments of the present invention, one end of the upper mold assembly 110 extending along the lip 101 is slidably mounted on the frame 900 via a slide rail mechanism. The slide rail extends in the vertical direction, and the lifting mechanism can be a cylinder mechanism, a hydraulic cylinder mechanism, or a motor-driven screw mechanism, etc., to drive the upper mold assembly 110 to move up and down.

[0073] It is conceivable that, in some embodiments of the present invention, one end of the first lower mold 121 extending along the lip 101 is rotatably connected to the upper mold assembly 110, and one end of the second lower mold 122 extending along the lip 101 is rotatably connected to the upper mold assembly 110.

[0074] Specifically, such as Figures 7 to 9 As shown, one end of the upper mold assembly 110 extending along the lip 101 is mounted on the frame 900 via a lifting mechanism. The ends of the first lower mold 121 and the second lower mold 122 near the lifting mechanism are rotatably connected to the upper mold assembly 110. When the upper mold assembly 110 rises, the rotatable connection ends of the first lower mold 121 and the second lower mold 122 rise with the upper mold assembly 110. The other ends of the first lower mold 121 and the second lower mold 122 are kept roughly at the initial horizontal position due to their own weight, so that the first lower mold 121 and the second lower mold 122 open relative to the upper mold assembly 110, making it convenient for operators to clean or maintain the mold head.

[0075] It is conceivable that, in some embodiments of the present invention, the ends of the first lower mold 121 and the second lower mold 122 away from the lifting mechanism are rotatably connected to the upper mold assembly 110. When the upper mold assembly 110 is raised, the coating die head assembly 100 can also be opened, which will not be described in detail here.

[0076] It is conceivable that, in some embodiments of the present invention, the side of the first lower mold 121 opposite to the lip 101 is rotatably connected to the upper mold assembly 110, and the side of the second lower mold 122 opposite to the lip 101 is rotatably connected to the upper mold assembly 110.

[0077] Specifically, such as Figures 10 to 12As shown, one end of the upper mold assembly 110 extending along the lip 101 is mounted on the frame 900 via a lifting mechanism. The first lower mold 121 and the second lower mold 122 are located on both sides below the upper mold assembly 110. The sides of the first lower mold 121 and the second lower mold 122 near the middle of the upper mold assembly 110 are rotatably connected to the middle of the upper mold assembly 110. When the upper mold assembly 110 rises, the sides of the first lower mold 121 and the second lower mold 122 near the middle of the upper mold assembly 110 rise with the upper mold assembly 110. The other sides of the first lower mold 121 and the second lower mold 122 remain roughly at the initial horizontal position due to their own weight, so that the first lower mold 121 and the second lower mold 122 open relative to the upper mold assembly 110, forming an opening structure to both sides, which facilitates the operator to clean or maintain the mold head.

[0078] It is conceivable that in some embodiments of the present invention, the frame 900 is provided with a support platform 901, the first lower mold 121 and the second lower mold 122 are disposed above the support platform 901, the support platform 901 is used to support the unraised end / side of the first lower mold 121 and the second lower mold 122, and a sliding member is provided between the first lower mold 121 and / or the second lower mold 122 and the support platform 901 to reduce the resistance to the movement of the other end / side when one end / side of the first lower mold 121 and the second lower mold 122 is raised.

[0079] It is conceivable that, in some embodiments of the present invention, the sliding member is a directional roller corresponding to the movable direction of the first lower mold 121 and the second lower mold 122.

[0080] Specifically, such as Figures 7 to 9 As shown, longitudinal pulleys 133 are provided at the bottom of the first lower mold 121 and the second lower mold 122 away from the rotating connection end. The longitudinal pulleys 133 can move along the extension direction of the lip 101 to reduce the swing opening resistance of the first lower mold 121 and the second lower mold 122.

[0081] Specifically, such as Figures 10 to 12 The bottom of the first lower mold 121 and the second lower mold 122 are provided with a transverse pulley 134. The transverse pulley 134 can move in a direction perpendicular to the lip 101 to reduce the swing opening resistance of the first lower mold 121 and the second lower mold 122.

[0082] As one can imagine, the sliding component can also be a universal roller or a bullseye bearing, etc., which will not be described in detail here.

[0083] It is conceivable that, in some embodiments of the present invention, locking mechanisms are respectively provided between the first lower mold 121 and the upper mold assembly 110, and between the second lower mold 122 and the upper mold assembly 110.

[0084] Specifically, the locking mechanism can lock the first lower die 121 and the upper die assembly 110, and the second lower die 122 and the upper die assembly 110, so that the lifting mechanism can not only open and close the coating die assembly 100, but also drive the coating die assembly 100 to lift as a whole when the locking mechanism can lock the coating die assembly 100, so as to adjust its relative position with the back roller, and thus adjust the coating gap.

[0085] As can be imagined, in some embodiments of the present invention, the upper mold assembly 110 includes two upper mold heads 111 corresponding to the first lower mold 121 and the second lower mold 122 respectively; or, the upper mold assembly 110 is a single mold head corresponding to the first lower mold 121 and the second lower mold 122.

[0086] Specifically, such as Figure 4 As shown, the upper mold assembly 110 is a single mold head corresponding to the first lower mold 121 and the second lower mold 122. The first lower mold 121 and the second lower mold 122 can share a set of feeding channels, which can simplify the feeding system.

[0087] Specifically, such as Figure 6 As shown, the upper mold assembly 110 includes two upper mold heads 111 corresponding to the first lower mold 121 and the second lower mold 122 respectively, and is configured with two sets of feeding channels. At this time, the lips 101 on both sides of the coating mold head assembly 100 can output different coatings to meet different usage requirements.

[0088] It is conceivable that, such as Figure 5 As shown, both the upper mold assembly 110 and the lower mold assembly 120 can be single mold heads or can meet the requirements of dual-head feeding.

[0089] like Figure 6 As shown, in some embodiments of the present invention, the upper mold assembly 110 is provided with a first feed channel 112 and a second feed channel 113. The first feed channel 112 is connected to the first discharge slit 131, and the second feed channel 113 is connected to the second discharge slit 132. This avoids the problem that the upper mold head and the lower mold head cannot be opened and closed due to the existing method of forming the feed channel on the lower mold head.

[0090] According to a second aspect of the present invention, a coating apparatus control method is applied to the above-described coating apparatus, comprising: detecting the displacement of a movable seat relative to a frame 900 or a coating die assembly 100 by a displacement detection component 240 and feeding back the detection result to a control module; when the detection result remains unchanged after a preset time period, the control module adjusts the force applied to the movable seat 220 by the drive component 210 according to the received detection result of the displacement detection component 240, so that the movable seat 220 moves relative to the coating die assembly 100, thereby causing the detection result of the displacement detection component 240 to return to a preset interval value.

[0091] It is understandable that the shorter the preset time period, the higher the requirements for the response speed of the control module and the corresponding driver. When the response speed is fast enough, the preset time period tends to be 0. According to the coating apparatus control method of this embodiment, the displacement detection component 240 detects the displacement of the moving seat 220 relative to the frame 900 or the coating die assembly 100 and feeds it back to the control module to control and adjust the force applied to the moving seat 220 by the driving component 210. This facilitates precise adjustment of the gap between the control back roller 200 and the coating die assembly 100, thereby maintaining a precise and constant coating gap, which is convenient for production applications. In practical applications, the preset time can be set according to actual usage needs.

[0092] It is conceivable that, in some embodiments of the present invention, the driving member 210 acts on the movable seat 220 through the push rod 211. A pressure sensor 230 is provided between the push rod 211 and the movable seat 220. The pressure sensor 230 is electrically connected to the control module. The pressure sensor 230 detects the force between the push rod 211 and the movable seat 220 and feeds back the detection result to the control module. Based on the detection result received from the pressure sensor 230, the control module adjusts the force applied to the movable seat 220 by the driving member 210, and at the same time determines the areal density of the film material and marks the positions where the areal density of the film material exceeds the preset range.

[0093] Understandably, during use, the pressure sensor 230 detects the force between the push rod 211 and the moving seat 220. When the substrate area increases or the amount of slurry output from the coating die assembly 100 increases due to errors at a certain time, it will exert a squeezing force on the back roller 200. The pressure sensor 230 can detect the reaction force on the back roller 200. First, the control module can adjust the force applied to the moving seat 220 by the drive component 210 in a timely manner based on the information from the back roller 200, which helps to maintain a precise and constant coating gap. Second, under the condition of the same coating gap and the same substrate thickness, The areal density of the substrate coating can be determined based on the different reaction forces applied by the substrate. Specifically, the greater the reaction force of the substrate, the greater the areal density of the substrate coating. This allows for the acquisition of areal density information of the substrate coating, facilitating quality monitoring. If the calculated areal density exceeds the preset range and fails to meet the usage requirements, the substrate at that location is marked for subsequent rejection or other processing. In addition, the pressure sensor 230 can also obtain real-time information on the driving pressure of the monitoring drive 210 on the push rod 211, which is beneficial for more precise adjustment of the actual output pressure of the drive 210.

[0094] According to a third aspect of the present invention, a coating machine includes the coating apparatus of any of the above embodiments, and the coating gap on both sides of the coating die head can be adjusted by moving the back roller and / or the coating die head.

[0095] Specifically, such as Figure 13 As shown, the coating machine includes a coating device, a first oven 910, a second oven 920, an unwinding device 930, and a rewinding device 940. The substrate is unwound from the unwinding device 930 and passes through the back roller 200 located on the right side of the coating die assembly 100. It passes through the coating gap between the right side of the coating die assembly 100 and the back roller 200 to coat one side of the substrate. The substrate then enters the first oven 910 to dry the coating. After exiting the first oven 910, the substrate passes through the back roller 200 located on the left side of the coating die assembly 100 and enters the coating gap between the left side of the coating die assembly 100 and the back roller 200 to coat the other side of the substrate. Finally, after being dried in the second oven 920, it is rewound by the rewinding device 940, thus completing the double-sided coating of the substrate.

[0096] What one can think of is, such as Figure 14 As shown, in some embodiments of the present invention, only one post-drying oven 950 may be configured. After the substrate is coated on both sides, it is dried in the post-drying oven 950, which can save one oven. When applied to the double-sided coating process, since the coating on both sides of the substrate is wet, the side containing the wet material cannot have physical contact with the back roller. Therefore, it is necessary to avoid the substrate from contacting the back roller 200 on the left side of the figure. In this case, the back roller 200 may not be configured or may be removed, or the back roller may be driven away from the substrate.

[0097] The technical features of the above embodiments can be combined in any way. For the sake of brevity, not all possible combinations of the technical features in the above embodiments are described. However, as long as there is no contradiction in the combination of these technical features, they should be considered to be within the scope of this specification.

[0098] Of course, the present invention is not limited to the above-described embodiments. Those skilled in the art can make equivalent modifications or substitutions without departing from the spirit of the present invention. All such equivalent modifications or substitutions are included within the scope defined by the claims of this application.

Claims

1. A coating apparatus, characterized in that, include: Coating die assembly; Two sets of back rollers, one set of which is located on one side of the coating die assembly and the other set of which is located on the other side of the coating die assembly. Both sets of back rollers are equipped with a moving drive mechanism, which can drive the back rollers to move relative to the coating die assembly to adjust the gap between the back rollers and the coating die assembly. The coating die assembly is fixedly mounted on the frame; The moving drive mechanism includes a drive member disposed on the frame and a movable seat movably disposed on the frame. The back roller is disposed on the movable seat. The drive member can drive the movable seat to move so that the back roller moves away from or closer to the coating die assembly. The movable seat is equipped with a displacement detection component. The coating apparatus further includes a control module, which is electrically connected to the drive component and the displacement detection component. The displacement detection component can detect the displacement of the moving seat relative to the frame or the coating die assembly and feed it back to the control module. The control module can control and change the force applied to the moving seat by the drive component. The driving component acts on the movable seat via a push rod. A pressure sensor is provided between the push rod and the movable seat. The pressure sensor is electrically connected to the control module. The pressure sensor detects the force between the push rod and the movable seat and feeds back the detection result to the control module. Based on the received detection result from the pressure sensor, the control module adjusts the force applied to the movable seat by the driving component, determines the areal density of the film material, and marks the locations where the areal density of the film material exceeds a preset range.

2. The coating apparatus according to claim 1, characterized in that: The driving component acts on the movable base via a push rod, and the push rod is movably connected to the movable base.

3. The coating apparatus according to claim 2, characterized in that: The movable seat is provided with a connector, the connector having a connecting cavity, the connecting cavity having an open structure on the side facing the push rod, the end of the push rod being able to be inserted into the connecting cavity, the connecting cavity being able to restrict the push rod from exiting the connecting cavity along its axial direction, and the end of the push rod being able to move along the axial direction of the push rod and move up and down along the radial direction of the push rod within the connecting cavity.

4. The coating apparatus according to claim 1, characterized in that: A telescopic connector is provided between the movable seat and the frame. The telescopic direction of the telescopic connector is parallel to the moving direction of the movable seat, and both ends of the telescopic connector are respectively hinged to the frame and the movable seat. The telescopic connector applies a force to the movable seat in the direction away from or towards the coating die assembly.

5. The coating apparatus according to claim 1, characterized in that: The coating die assembly includes an upper die assembly and a lower die assembly, wherein the lower die assembly includes a first lower die and a second lower die; wherein... The upper mold assembly includes two upper mold heads that correspond to the first lower mold and the second lower mold, respectively. or, The upper mold assembly is a single mold head corresponding to the first lower mold and the second lower mold.

6. A coating apparatus control method, applied to the coating apparatus according to any one of claims 1-4, characterized in that, include: The displacement detection component detects the displacement of the movable seat relative to the frame or the coating die assembly and feeds back the detection result to the control module. When the detection result remains unchanged after a preset time period, the control module adjusts the force applied to the movable seat by the drive component based on the received detection result from the displacement detection component, so that the movable seat moves relative to the coating die assembly, thereby causing the detection result of the displacement detection component to return to the preset interval value.

7. A coating machine, characterized in that, include: The coating apparatus as described in any one of claims 1 to 5.

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