Extrusion type coating die head mechanism and extrusion coating machine

Abstract

The invention discloses an extrusion type coating die head mechanism and an extrusion coating machine. The extrusion type coating die head mechanism comprises a die head body and a sealing mechanism, the die head body is provided with a lip which is used for outputting slurry and forming a coating area; the sealing mechanism comprises a plugging assembly and a fixing assembly, and the plugging assembly is adjustably arranged on the die head body and used for adjusting the width of a coating area; the fixing assembly is used for fixing the state of the plugging assembly after the width of the coating area is adjusted. In the application, the width of the coating area formed by the slurry is changed by adjusting the plugging assembly, and then the state of the plugging assembly is kept by the fixing assembly, so that the effect of stepless adjustment of the width of the coating area is realized, and the adjustment can be carried out in the coating process without interruption of production.

Description

Technical Field

[0001] This application relates to the technical field of extrusion coating machines, and particularly to an extrusion coating die head mechanism and an extrusion coating machine. Background Art

[0002] In the related technology of extrusion coating machines, the die head body is composed of an upper die, a lower die and a gasket. The three form a slurry flow channel inside the die head, and the gasket controls the width and position of the flow channel, thereby controlling the width and position of the coating area.

[0003] Therefore, in actual production, when it is necessary to change the coating area, it is necessary to disassemble and replace the gasket, and the width of the coating area is adjusted by using different gaskets. However, the method of changing the coating area by replacing the gasket not only has problems such as interruption of production, long time consumption, and influence on production progress, but also the slurry production and storage systems need to be adjusted accordingly, which may cause additional associated costs. Summary of the Invention

[0004] This application provides an extrusion coating die head mechanism, which is used to effectively solve the technical problems of the influence on production progress and associated costs caused by changing the coating area by replacing the gasket in the related technology.

[0005] This application also provides an extrusion coating machine including the above extrusion coating die head mechanism.

[0006] The first aspect embodiment of this application provides an extrusion coating die head mechanism, including: a die head body and a sealing mechanism;

[0007] The die head body has a lip for outputting slurry and forming a coating area;

[0008] The sealing mechanism includes a plugging component and a fixing component. The plugging component is adjustably arranged on the die head body to adjust the width of the coating area;

[0009] The fixing component is used to fix the state of the plugging component after adjusting the width of the coating area.

[0010] Further, the plugging component is movably arranged and used to plug a part of the slurry output from the lip in the width direction, so that the slurry output from the lip can flow out from one side of the plugging component.

[0011] Further, a groove is formed on the die head body, and the plugging component is movably arranged on the groove.

[0012] Further, the groove is adjacent to the lip and located upstream of the slurry output direction, and the blank area on one side of the plugging component in the groove can be used as a buffer chamber to cooperate with the lip to output slurry.

[0013] Further, the plugging assembly includes an expansion member movably disposed in the groove. The fixing assembly is configured to expand the expansion member to fix its position in the groove, and the expansion member can seal the gap between the expansion member and the groove through expansion.

[0014] Further, the fixing assembly includes a gas supply system. The expansion member is a flexible structure, and the gas supply system is configured to supply gas to the expansion member to cause the expansion member to expand under the action of air pressure.

[0015] Further, the extrusion coating die head mechanism further includes a motion mechanism configured to drive the plugging assembly to move.

[0016] Further, the motion mechanism includes a first driving assembly and a linear transmission assembly. The first driving assembly is configured to drive the plugging assembly to move in the groove through the linear transmission assembly.

[0017] Alternatively, the motion mechanism includes a second driving assembly, a winding and unwinding assembly, and a guide wheel set. The plugging assembly is wound and stored in the winding and unwinding assembly. The second driving assembly is configured to drive the winding and unwinding assembly to rotate to drive the plugging assembly to move in the groove, and the guide wheel set is configured to guide the movement of the plugging assembly.

[0018] Further, a end member is provided at one end of the plugging assembly, and the end member is configured to control the edge thickness of the formed coating area.

[0019] And / or two plugging assemblies are provided and are respectively located on both sides in the width direction of the lip. Each plugging assembly is movably disposed respectively, so that the width and position of the formed coating area are respectively adjustable.

[0020] It can be seen from the above technical solutions that the embodiments of the present application at least have the following beneficial effects: By adjusting the plugging assembly to change the width of the coating area formed by the slurry, and then the fixing assembly maintains the state of the plugging assembly, so as to achieve the effect of steplessly adjusting the width of the coating area, and the adjustment can be carried out during the coating process without interrupting production.

[0021] An embodiment of the second aspect of the present application provides an extrusion coater, including: the extrusion coating die head mechanism as in the embodiment of the first aspect of the present application.

[0022] It is not difficult to understand that the extrusion coater in the embodiment of the second aspect of the present application has the technical effects of the extrusion coating die head mechanism in the previous embodiment of the first aspect, and thus will not be described in detail.

[0023] Additional aspects and advantages of the present application will be given in part in the following description, become apparent in part from the following description, or be learned through the practice of the present application. BRIEF DESCRIPTION OF THE DRAWINGS

[0024] In order to more clearly illustrate the technical solutions in the embodiments of the present application or the prior art, the following will briefly introduce the drawings required for use in the description of the embodiments or the prior art. Obviously, the drawings in the following description are only some embodiments of the present application. For those of ordinary skill in the art, without creative efforts, other drawings can be obtained based on these drawings.

[0025] Figure 1 Structural schematic diagram of an extrusion coating die head mechanism provided by an embodiment of the present application, where the expansion member is in an uninflated state;

[0026] Figure 2 Internal schematic diagram of an extrusion coating die head mechanism provided by an embodiment of the present application, where the expansion member is in an inflated state;

[0027] Figure 3 Internal schematic diagram of an extrusion coating die head mechanism provided by another embodiment of the present application, where the expansion member is in an uninflated state;

[0028] Figure 4 Internal schematic diagram of an extrusion coating die head mechanism provided by an embodiment of the present application, where the expansion member is in an inflated state;

[0029] Figure 5 Schematic diagram of the upper die of an extrusion coating die head mechanism provided by an embodiment of the present application;

[0030] Figure 6 Schematic diagram of the lower die of an extrusion coating die head mechanism provided by an embodiment of the present application;

[0031] Wherein, Figure 1 and Figure 2 are internal diagrams shown when the same motion mechanism is adopted, Figure 3 and Figure 4 are internal diagrams shown when another motion mechanism is adopted, Figure 5 and Figure 6 are schematic diagrams showing the relative positional relationship between the lip and the groove based on the general design of the extrusion die head.

[0032] Reference Numerals:

[0033] 100, die head body; 101, upper die; 102, lower die; 110, lip; 120, groove; 121, blank area;

[0034] 200, Sealing mechanism; 210, Plugging component; 211, Expansion component; 212, End component; 220, Fixing component; 221, Gas supply system;

[0035] 300, Movement mechanism; 310, First driving component; 320, Linear transmission component; 330, Second driving component; 340, Rewinding and unwinding component; 350, Guide wheel set. Specific embodiments

[0036] Next, the technical solutions in the embodiments of the present application will be clearly and completely described in conjunction with the accompanying drawings in the embodiments of the present application. Obviously, the described embodiments are only a part of the embodiments of the present application, rather than all the embodiments. Based on the embodiments in the present application, all other embodiments obtained by those of ordinary skill in the art without creative efforts shall fall within the protection scope of the present application.

[0037] See Figures 1 to 6 As shown, an embodiment of the first aspect of the present application discloses an extrusion coating die head mechanism, including a die head body 100 and a sealing mechanism 200.

[0038] The die head body 100 has a lip 110, and the lip 110 is used to output the slurry and form a coating area; the sealing mechanism 200 includes a plugging component 210 and a fixing component 220. The plugging component 210 is adjustably arranged on the die head body 100 to adjust the width of the coating area; the fixing component 220 is used to fix the state of the plugging component 210 after adjusting the width of the coating area.

[0039] In the embodiment of the present application, by adjusting the plugging component 210, the width of the coating area formed by the slurry is changed, and then the state of the plugging component 210 is maintained by the fixing component 220, so as to achieve the effect of steplessly adjusting the width of the coating area, and the adjustment can be carried out during the coating process without interrupting production.

[0040] It can be understood that the die head body 100 includes an upper die 101 and a lower die 102. A slurry flow channel is formed between the upper die 101 and the lower die 102. The end of the slurry flow channel is the lip 110. The extrusion coating die head mechanism of the present application outputs the slurry through the lip 110 and forms a coating area. Through the sealing mechanism 200 of the present application, the width of the coating area and the position of the coating area can be controlled. Among them, the sealing mechanism 200 of the present application includes a plugging component 210 and a fixing component 220. The plugging component 210 is adjustable during the coating process. After adjusting to the appropriate state, the state of the plugging component 210 is fixed by controlling the fixing component 220. There is no need to interrupt production and it can be closed-loop controlled according to the coating effect, so as to achieve the purpose of accurately controlling the width and position of the coating area, thereby realizing the effect of steplessly adjusting the width and position of the coating area.

[0041] It should be noted that the blocking component 210 feeds back to the width of the formed coating area by adjusting the amount of slurry output by the lip 110 in the width direction. It should be understood that based on the setting method of the blocking component 210, the width adjustment of the coating area can be achieved in various ways.

[0042] In some embodiments, the blocking component 210 is located on one side of the lip 110 in the width direction and is movably arranged. By adjusting the distance between the other side of the lip 110 in the width direction and the blocking component 210, the slurry flow area is directly restricted, thereby achieving the width adjustment effect of the coating area. In this embodiment, the fixing component 220 fixes its state after the blocking component 210 is adjusted to a suitable position, so that the position of the blocking component 210 is fixed.

[0043] Furthermore, in some embodiments, when two blocking components 210 are provided, by adjusting the distance between the two oppositely arranged blocking components 210, the slurry flow area can also be directly restricted, thereby achieving the width adjustment effect of the coating area. In this embodiment, the fixing component 220 is used to fix the positions of the blocking components 210 simultaneously, or fixing components 220 are respectively provided for the two blocking components 210 to cooperate, and each fixing component 220 is respectively used to fix the positions of the blocking components 210 simultaneously.

[0044] In some embodiments, the blocking component 210 can be set as a common flow rate adjustment component such as a regulating valve or a flow splitter plate. By adjusting the flow rate of the slurry output by the lip 110, the width adjustment effect of the coating area is achieved. In this embodiment, the fixing component 220 fixes its state after the blocking component 210 is adjusted to a suitable opening degree, so that the opening degree of the blocking component 210 is fixed.

[0045] In some embodiments, the blocking component 210 can be set as a flow channel with an adjustable width. The flow channel is communicated with the lip 110 and the width adjustment effect of the coating area is achieved by adjusting the width of the flow channel. In this embodiment, the fixing component 220 fixes its state after the blocking component 210 is adjusted to a suitable width, so that the flow channel width of the blocking component 210 is fixed.

[0046] Furthermore, in some embodiments, the adjustment methods of the flow channel width include but are not limited to methods such as adjusting through a mechanical structure, adjusting through a flow rate adjustment component, and adjusting the air pressure or hydraulic pressure, etc., to deform the wall surface of the flexible flow channel to achieve the adjustment.

[0047] Next, the extrusion coating die head mechanism disclosed in the embodiments of the present application will be specifically explained and described in conjunction with Figures 1 to 6 In some embodiments of the present application, with reference to

[0048] In some embodiments of the present application, with reference to Figures 1 to 4, the blocking component 210 is movably arranged and used to block part of the slurry output from the lip 110 in the width direction, so that the slurry output from the lip 110 can flow out from one side of the blocking component 210.

[0049] It can be understood that in this application, by movably arranging the blocking component 210 to block part of the slurry output from the lip 110 in the width direction, the width adjustment effect of the coating area is achieved. Among them, the blocking component 210 is located on one side of the lip 110 in the width direction and is movably arranged. By adjusting the distance between the other side of the lip 110 in the width direction and the blocking component 210, the slurry flow area is directly restricted, so as to achieve the width adjustment effect of the coating area. Specifically, the slurry flowing out from one side of the blocking component 210 means flowing out from the blanking area 121 between the other side of the lip 110 in the width direction and the blocking component 210.

[0050] In some embodiments, the blocking component 210 can move arbitrarily in the width direction of the die head body 100 to achieve stepless adjustment of the width and position of the coating area. Among them, the moving mode of the blocking component 210 in the width direction can be horizontal, inclined or curved movement. The blocking component 210 gradually moves on one side of the lip 110 in the width direction, and after moving, changing the distance between the other side of the lip 110 in the width direction and the blocking component 210 can achieve the width adjustment effect of the coating area.

[0051] Furthermore, when two blocking components 210 are respectively arranged, by adjusting the distance between the two relatively arranged blocking components 210 through the above-mentioned movable adjustment method, the slurry flow area can also be directly restricted, so as to achieve the width adjustment effect of the coating area.

[0052] In some embodiments of the present application, the groove 120 extends along the width direction of the lip 110, and the blocking component 210 moves horizontally in the width direction.

[0053] In order to make the adjustment accuracy of the blocking component 210 higher, in some embodiments of the present application, referring to Figures 1 to 6 , a groove 120 is formed on the die head body 100, and the blocking component 210 is movably arranged on the groove 120. It can be understood that the blocking component 210 realizes stepless adjustment of the width and position of the coating area by means of sliding adjustment. Among them, the groove 120 is formed on the upper die 101 and the lower die 102, and the grooves 120 of the upper die 101 and the lower die 102 are respectively used to guide the movement of the blocking component 210.

[0054] It should be understood that in order to make the flow rate of the adjusted lip 110 more uniform and higher in the width direction, in some embodiments of the present application, the groove 120 is adjacent to the lip 110 and located upstream of the slurry output direction. The blank area 121 in the groove 120 beside the plugging component 210 can serve as a buffer chamber to cooperate with the lip 110 to output the slurry.

[0055] It should be noted that the die head body 100 is formed with a groove 120. The plugging component 210 is movably arranged on the groove 120 and is used to plug a part of the slurry output by the lip 110 in the width direction, so that the slurry output by the lip 110 can flow out from the blank area 121 in the groove 120 beside the plugging component 210. In the present application, the groove 120 is not only used to arrange the plugging component 210 and guide it, but also used to act as a buffer chamber.

[0056] It can be understood that the plugging component 210 is arranged in the groove 120. After the plugging component 210 is adjusted to a suitable position on one side of the lip 110 in the width direction and fixed by the fixing component 220, at this time, the slurry flows out from the area between the plugging component 210 and the other side of the lip 110 in the width direction. And the groove 120 is located upstream of the lip 110. Therefore, the slurry must pass through the blank area 121 beside the plugging component 210 in the groove 120 before being output from the lip 110. The blank area 121 of this groove 120 can be used as a buffer chamber to optimize the uniformity of the slurry flow rate in the width direction of the die head lip 110.

[0057] Furthermore, in the embodiment where two plugging components 210 are arranged in the groove 120, after the two plugging components 210 are adjusted to suitable positions and fixed by the fixing component 220, the slurry flows out from the blank area 121 between the two plugging components 210 in the groove 120 and is then output by the lip 110. The empty groove between the two side plugging components 210 can be used as a buffer chamber to optimize the uniformity of the slurry flow rate in the width direction of the die head lip 110.

[0058] It can be understood that the plugging component 210 is slidably arranged on the groove 120. In the case of repeated use or low machining accuracy, it is easy to have a gap between the plugging component 210 and the groove 120. And the appearance of the gap is likely to cause the slurry to seep out from the width position where the plugging component 210 is located, which affects the accuracy of the coating area. If you want to ensure a higher accuracy of the formed coating area and make the plugging effect of the plugging component 210 on the slurry more stable, the structural design of the plugging component 210 is the key to realizing the above functions.

[0059] In this regard, in some embodiments of the present application, referring to Figures 1 to 4, the plugging assembly 210 includes an expansion member 211. The expansion member 211 is movably arranged in the groove 120. The fixing assembly 220 is used to expand the expansion member 211 to fix its position in the groove 120, and the expansion member 211 can seal the gap between the expansion member 211 and the groove 120 through expansion.

[0060] It can be understood that when not fixed by the fixing assembly 220, there is a gap between the expansion member 211 and the groove 120, and the entire component can move along the direction of the groove 120. When fixed by the fixing assembly 220, the expansion member 211 expands and is in close contact with the inner wall of the groove 120, blocking the flow of the slurry. The slurry can only flow to the lip 110 and be coated in the blank area 121 beside the expansion member 211. Through the above setting method, it not only facilitates the movement adjustment of the expansion member 211, but also eliminates the gap and achieves a sealing effect through elastic sealing, thereby ensuring a higher precision of the formed coating area.

[0061] In some embodiments, the expansion methods of the expansion member 211 include but are not limited to achieving expansion through the expansion and contraction of mechanical structures, the expansion and contraction of flexible materials, the deformation of deformable materials, etc.

[0062] In some embodiments of the present application, with reference to Figures 1 to 4 , the fixing assembly 220 includes a gas supply system 221. The expansion member 211 is of a flexible structure. The gas supply system 221 is used to supply gas to the expansion member 211 so that the expansion member 211 expands under the action of air pressure.

[0063] It can be understood that the fixing assembly 220 causes the expansion member 211 to undergo flexible deformation and expand through the action of air pressure, making the fixing method more convenient. Moreover, it is also possible to determine whether the expansion is in place through the magnitude of the air pressure value, thereby ensuring the sealing effect.

[0064] In some embodiments, the expansion member 211 is a sealed hose. The fixing assembly 220 includes a gas supply system 221 and a ventilation pipe. The sealed hose is provided with a head and an air sealing plate to form an airtight cavity. The ventilation pipe is connected to the gas supply system 221 and extends into the airtight cavity. When the gas supply system 221 supplies gas through the ventilation pipe, the sealed hose expands under air pressure, is in close contact with the inner wall of the groove 120, and blocks the flow of the slurry. The slurry can only flow to the lip 110 and be coated in the blank area 121.

[0065] In other embodiments, it is also possible to achieve the effect of blocking the slurry from flowing into the gap between the expansion member 211 and the groove 120 by expanding the expansion member 211 through a mechanical structure or a hydraulic system.

[0066] In some embodiments of the present application, the extrusion coating die head mechanism further includes a motion mechanism 300, which is used to drive the sealing component 210 to move. It can be understood that driving the sealing component 210 to move through the motion mechanism 300 improves the degree of automation, and the accuracy of the movement is also ensured, making the width adjustment accuracy of the coating area higher.

[0067] It should be understood that according to different usage environments, the specific composition of the motion mechanism 300 can be adaptively adjusted. For example, it can be divided into wide type and narrow type according to the length dimension in the width direction of the die head. In actual application, depending on the width limitation, select a motion mechanism 300 such as Figure 1 and Figure 2 , or a motion mechanism 300 such as Figure 3 and Figure 4 .

[0068] In some embodiments of the present application, referring to Figure 1 and Figure 2 , it is a schematic diagram of the sealing mechanism 200 on one side of the die head for the wide-type solution. The motion mechanism 300 includes a first driving component 310 and a linear transmission component 320. The first driving component 310 is used to drive the sealing component 210 to move in the groove 120 through the linear transmission component 320.

[0069] It can be understood that on the basis that the length dimension of the groove 120 is wide-type, the movement of the sealing component 210 is not easily blocked. Therefore, the sealing component 210 can be driven to move along the groove 120 by the cooperation of the first driving component 310 and the linear transmission component 320.

[0070] In some embodiments, the linear transmission component 320 is a common transmission structure such as a screw transmission component or a linear module.

[0071] In some embodiments of the present application, referring to Figure 3 and Figure 4 , the motion mechanism 300 includes a second driving component 330, a winding and unwinding component 340, and a guiding wheel set 350. The sealing component 210 is wound and stored in the winding and unwinding component 340. The second driving component 330 is used to drive the winding and unwinding to rotate to drive the sealing component 210 to move in the groove 120, and the guiding wheel set 350 is used to guide the movement of the sealing component 210.

[0072] It can be understood that on the basis that the length dimension of the groove 120 is narrow-type, at this time the sealing component 210 is more slender. Therefore, using the winding and unwinding component 340 and the guiding wheel set 350 together can improve the movement efficiency and accuracy of the sealing component 210.

[0073] In some embodiments, the plugging component 210 located outside the die head is retracted into a winding drum. When the plugging component 210 needs to move, the winding drum rotates synchronously with the guide wheel set 350 to control the movement of the plugging component 210 within the groove 120. One end of the plugging component 210 forms a seal with the end head, and the other end is connected to the rotary joint of the winding drum, maintaining airtightness during movement. Specifically, the plugging component 210 is a sealing hose.

[0074] It can be understood that Figures 1 to 4 The figure shows a schematic diagram of the unilateral sealing mechanism 200 on the die head body 100. When sealing mechanisms 200 are provided on both sides of the die head body 100, based on the same principle of use of the sealing mechanisms 200, the structures of the sealing mechanisms 200 on both sides are the same and can also be adjusted adaptively.

[0075] Due to the related art, there is also a technical problem that it is difficult to control the edge thickness of the coating area.

[0076] In response to this, in some embodiments of the present application, referring to Figures 1 to 4 , a head component 212 is provided at one end of the plugging component 210, and the head component 212 is used to control the edge thickness of the formed coating area.

[0077] It can be understood that after the plugging component 210 is adjusted to the appropriate position, the head component 212 is located at both ends of the blank area 121. The shape of the head is specially designed to meet the requirements of thinning the edge of the coating in the coating process at this time, so as to control the edge thickness of the formed coating area.

[0078] In some embodiments, the head component 212 can be used to form a multi-layer stepped structure at the end of the plugging component 210. By controlling the flow rate of the slurry flowing to the edge through different numbers of steps, a gradient-distributed thinning area is formed to inhibit the edge migration of the slurry during the drying process, improve the thick-edge problem, and thus adjust the thinning degree.

[0079] In some embodiments, the head component 212 can be used to form a spiral step at the end of the plugging component 210. By means of a smooth spiral curve, the interference with the flow trajectory of the slurry is reduced, and uniform thinning is achieved at the same time.

[0080] In some embodiments, the chamfer of the head component 212 can be structurally designed. Reasonable design of the chamfer parameters can avoid excessive or insufficient thinning, and the thinning shape is affected by the chamfer size of the head.

[0081] The effect of controlling the edge thickness of the formed coating area can be achieved by at least one of the above-mentioned head shape designs.

[0082] It can be understood that if you want to adjust the width and position of the coating area more flexibly, in some embodiments of the present application, two blocking components 210 are provided and are respectively located on both sides in the width direction of the lip 110. Each blocking component 210 is respectively movably arranged so that the width and position of the formed coating area are respectively adjustable. It can be understood that each blocking component 210 is respectively located on both sides in the width direction of the lip 110 of the die head body 100, and each blocking component 210 acts independently to achieve the effect of flexibly adjusting the width and position of the coating area.

[0083] The following describes the extrusion coating die head mechanism of the embodiments of the present application in detail with a specific embodiment. It should be noted that the following embodiments are only for exemplary description and should not be construed as a limitation of the embodiments of the present application.

[0084] See Figures 1 to 6 As shown, in the extrusion coating die head mechanism of this embodiment, an elastic sealing mechanism 200 is used in the die head to block the internal flow channel of the die head, thereby determining the width and position of the coating area. At the same time, the blocking component 210 can move arbitrarily in the groove 120 in the width direction of the die head to achieve stepless adjustment of the width and position of the coating area. The groove 120 of the coating area is not blocked by the blocking component 210, and the empty groove can be used as a buffer cavity to optimize the uniformity of the flow rate of the slurry in the width direction of the die head lip 110.

[0085] Specifically, the sealing mechanism 200 is designed in two types, which are divided into wide type and narrow type according to the length dimension in the width direction of the die head, and are selected according to the width limitation in actual use.

[0086] For the wide type solution, see Figures 1 to 2 , which shows a schematic diagram of the unilateral sealing mechanism 200 of the die head, and the structures on both sides are the same. The extrusion coating die head mechanism is composed of the following parts: a motion mechanism 300, a gas supply mechanism, a ventilation pipe, a sealing hose, a gas sealing plate, and a end head. The sealing hose is provided with ventilation holes and is connected to the end head. The end head, the gas sealing plate and the sealing hose form an airtight cavity. When no gas is supplied, there is a gap between the sealing hose and the groove 120, and the whole component can move along the direction of the groove 120 driven by the motion mechanism 300. When gas is supplied, the sealing hose expands under air pressure and is in close contact with the inner wall of the groove 120, blocking the flow of the slurry. The slurry can only flow to the lip 110 and be coated in the blanking area 121 between the two blocking components 210 on both sides. The outer shape of the end head is specially designed to meet the requirements of thinning the edge of the coating in the coating process at this time. The empty groove between the two blocking components 210 on both sides can be used as a buffer cavity to optimize the uniformity of the flow rate of the slurry in the width direction of the die head lip 110.

[0087] For the narrow type solution, see Figures 3 to 4, which shows a schematic diagram of the unilateral seal mechanism 200 of the die head, and the structures on both sides are the same. The extrusion coating die head mechanism consists of the following parts: a motion mechanism 300, a gas supply mechanism, a sealing hose, and a head. The motion mechanism 300 includes a rewinder, a rotary joint, and a guide wheel set 350. When the die head is narrow, the hose outside the die head is wound into the rewinding reel. When the hose needs to move, the rewinder rotates synchronously with the guide wheel set 350 to control the movement of the sealing hose in the groove 120. One end of the sealing hose is sealed with the head, and the other end is connected to the rotary joint of the rewinder, which can maintain airtightness during the movement. When no gas is supplied, there is a gap between the sealing hose and the groove 120, and the entire component can move along the direction of the groove 120 driven by the motion mechanism 300. When gas is supplied, the sealing hose expands under the air pressure and closely contacts the inner wall of the groove 120, blocking the flow of the slurry. The slurry can only flow to the lip 110 and be coated in the blank area 121 between the two side blocking components 210. The shape of the head is specially designed to meet the requirements of thinning the edge of the coating in the coating process at this time. The empty groove between the two side blocking components 210 can serve as a buffer chamber to optimize the uniformity of the slurry flow velocity in the width direction of the die head lip 110.

[0088] In summary, the area between the two side blocking components 210 of the die head is the coating area. By the working process of non-gas supply - moving the blocking component 210, gas supply - sealing, the width and position of the coating area can be adjusted steplessly. The two side blocking components 210 can be independently controlled, and the blocking component 210 can also be disassembled and assembled separately without disassembling the upper die 101 and the lower die 102.

[0089] An embodiment of the second aspect of the present application discloses an extrusion coater, which can be an extrusion coater applied to industries such as lithium batteries and panels. The extrusion coater includes: the extrusion coating die head mechanism of the embodiment of the first aspect of the present application.

[0090] It is not difficult to understand that the extrusion coater in the embodiment of the second aspect of the present application has the technical effects of the extrusion coating die head mechanism in the previous embodiment of the first aspect, so it will not be elaborated here.

[0091] In the description of the present application, it should be understood that the orientation or positional relationship indicated by the terms "center", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", etc. is based on the orientation or positional relationship shown in the drawings, and is only for the convenience of describing the present application and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of the present application.

[0092] The terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the quantity of the indicated technical features. Thus, features defined with "first" and "second" may explicitly or implicitly include one or more of such features. In the description of the present application, unless otherwise specified, the meaning of "a plurality of" is two or more.

[0093] In the description of the present application, it should be noted that unless otherwise clearly specified and defined, the terms "mounted", "connected" and "coupled" should be understood in a broad sense. For example, it may be a fixed connection, a detachable connection or an integral connection; it may be directly connected or indirectly connected through an intermediate medium, and it may be the communication inside two elements. For those of ordinary skill in the art, the specific meanings of the above terms in the present application may be understood according to specific circumstances.

[0094] In the description of this specification, specific features, structures, materials or characteristics may be combined in any one or more embodiments or examples in a suitable manner.

Claims

1. An extrusion coating die head mechanism, characterized in that, Comprising: A die head body and a sealing mechanism; The die head body has a lip, and the lip is used for outputting slurry and forming a coating area; The sealing mechanism includes a plugging component and a fixing component. The plugging component is adjustably arranged on the die head body to adjust the width of the coating area; The fixing component is used for fixing the state of the plugging component after adjusting the width of the coating area.

2. The extrusion coating die head mechanism according to claim 1, wherein: The plugging component is movably arranged and used for plugging a part of the slurry output from the lip in the width direction, so that the slurry output from the lip can flow out from one side of the plugging component.

3. The extrusion coating die head mechanism according to claim 2, wherein: A groove is formed on the die head body, and the plugging component is movably arranged on the groove.

4. The extrusion coating die head mechanism according to claim 3, characterized in that: The groove is adjacent to the lip and located upstream of the slurry output direction. The blank area on one side of the plugging component in the groove can be used as a buffer chamber to cooperate with the lip to output slurry.

5. The extrusion coating die head mechanism according to claim 3, wherein: The plugging component includes an expansion component. The expansion component is movably arranged in the groove. The fixing component is used for expanding the expansion component to fix the position in the groove, and the expansion component can seal the gap between the expansion component and the groove through expansion.

6. The extrusion coating die head mechanism according to claim 5, wherein: The fixing component includes a gas supply system. The expansion component is a flexible structure. The gas supply system is used for supplying gas to the expansion component so that the expansion component expands under the action of air pressure.

7. The extrusion coating die head mechanism according to claim 5, characterized in that: The extrusion coating die head mechanism further includes a motion mechanism, and the motion mechanism is used for driving the plugging component to move.

8. The extrusion coating die head mechanism according to claim 7, wherein: The motion mechanism includes a first driving component and a linear transmission component. The first driving component is used for driving the plugging component to move in the groove through the linear transmission component; Or the motion mechanism includes a second driving component, a winding and unwinding component and a guide wheel group. The plugging component is wound and stored in the winding and unwinding component. The second driving component is used for driving the winding and unwinding component to rotate to drive the plugging component to move in the groove, and the guide wheel group is used for guiding the movement of the plugging component.

9. The extrusion coating die head mechanism according to claim 1, wherein: A end component is arranged at one end of the plugging component, and the end component is used for controlling the edge thickness of the formed coating area; And / or two plugging components are arranged and are respectively located on both sides of the width direction of the lip. Each plugging component is respectively movably arranged so that the width and position of the formed coating area are respectively adjustable.

10. An extrusion coater, characterized in that, Comprising: The extrusion coating die head mechanism according to any one of claims 1 to 9.

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