Three-layer three-adjustment special-shaped coating die

Abstract

The application provides a three-layer three-adjustment special-shaped coating die head, which comprises an upper die, an upper middle die, a lower middle die and a lower die, an A material extrusion channel and an upper layer gasket are arranged between the upper die and the upper middle die, a B material extrusion channel and a middle layer gasket are arranged between the upper middle die and the lower middle die, a C material extrusion channel and a lower layer gasket are arranged between the lower middle die and the lower die, a series of A material adjusting blocks are arranged along the width direction at the A material extrusion channel, each A material adjusting block is connected with an A material adjusting block lifting mechanism after penetrating through the upper die, a series of B material adjusting blocks are arranged along the width direction at the B material extrusion channel, each B material adjusting block is connected with a B material adjusting block lifting mechanism after penetrating through the upper middle die, a deformation groove is arranged at the front end of the lower die, a thin-walled deformation part is formed at the front side of the deformation groove, a series of adjusting holes are arranged on the rear end surface of the lower die and are uniformly distributed along the width direction, and a push rod or a pull rod is arranged in each adjusting hole. The application can realize synchronous composite coating of three-layer slurry.

Description

Technical Field

[0001] This invention relates to the field of precision equipment for slot extrusion coating, and in particular to a three-layer, three-adjustable irregular-shaped coating die. Background Technology

[0002] Traditional die-casting techniques limit the number of coating layers, making it impossible to simultaneously coat three different slurries. Commercially available single-layer dies can only coat a single component slurry, while double-layer dies only support the combination of two slurries, failing to meet the processing requirements for simultaneously layering three different functional coatings. For products requiring a three-layer composite structure, the industry generally employs a step-by-step processing method involving multiple coating processes and multiple drying and curing steps. This not only results in cumbersome production procedures and low overall machine efficiency, but repeated high-temperature drying can also lead to problems such as aging, shrinkage, peeling, cracking, and decreased adhesion of the underlying coating, severely impacting the overall structural stability and finished product quality of the multi-layer composite coating.

[0003] Secondly, existing equipment struggles to achieve simultaneous three-color layering, resulting in low processing efficiency and precision for colored coatings. Currently, functional coatings and visual identification coatings with color layering structures rely on multiple material changes, layered coatings, and repeated alignment calibrations for processing. This process is not only time-consuming to change materials, wastes a large amount of slurry, and has low equipment uptime, but also easily leads to quality defects such as interlayer misalignment, edge color mixing, uneven coating thickness, and blurred layer boundaries due to multiple layering. It cannot achieve simultaneous one-time forming of a three-color composite coating with distinct and regular layers, which greatly limits the research and development and mass production of high-end appearance films, optical recognition coatings, and other products.

[0004] In summary, existing coating dies generally suffer from structural defects such as limited number of forming layers, lack of simultaneous processing capability for multiple slurries, inability to achieve three-color layer coating, lack of irregular forming function, single layer control precision, and inability to switch control modes, making it difficult to adapt to the high-precision and high-efficiency mass production requirements of three-layer coatings. Summary of the Invention

[0005] To address the aforementioned problems, this invention aims to provide a three-layer, three-adjustable irregular-shaped coating die head, which can achieve simultaneous composite coating of three layers of slurry.

[0006] The technical solution of this invention is a three-layer, three-adjustable irregular-shaped coating die head, characterized in that: it includes an upper die, an upper middle die, a lower middle die, and a lower die; an A-material extrusion channel and an upper layer gasket are provided between the upper die and the upper middle die; a B-material extrusion channel and a middle layer gasket are provided between the upper middle die and the lower middle die; a C-material extrusion channel and a lower layer gasket are provided between the lower middle die and the lower die; a series of A-material adjusting blocks are provided along the width direction at the A-material extrusion channel, and each A-material adjusting block passes through the upper die and is connected to an A-material adjusting block lifting mechanism; a series of B-material adjusting blocks are provided along the width direction at the B-material extrusion channel, and each B-material... After the adjusting block passes through the upper and middle molds, it is connected to the B material adjusting block lifting mechanism. The front end of the lower mold is provided with a deformation groove, and a thin-walled deformation part is formed on the front side of the deformation groove. The rear end face of the lower mold is provided with a series of adjusting holes evenly distributed along the width direction. Each adjusting hole is provided with a push rod or a pull rod. The push rod or pull rod acts on the deformation part of the lower mold to push or pull the deformation part to adjust the outlet gap of the C material extrusion channel. The bottom of the front end of the upper mold, the front end of the upper middle mold, the front end of the lower middle mold, and the top of the front end of the lower mold are assembled to form a conical extrusion end. The A material extrusion channel, the B material extrusion channel, and the C material extrusion channel converge at the conical extrusion end for extrusion.

[0007] Preferably, the lifting mechanism of the A material adjusting block includes a first micrometer screw lifting mechanism, the lower end of the first lifting screw of the first micrometer screw lifting mechanism is connected to a first coupling, and a first connecting rod extends from the top center of the A material adjusting block. The top of the first connecting rod passes through the upper mold and is connected to the first coupling.

[0008] Preferably, the B material adjusting block lifting mechanism includes a second micrometer screw lifting mechanism, the lower end of the second lifting screw of the second micrometer screw lifting mechanism is connected to a second coupling, a second connecting rod extends from the top center of the B material adjusting block, and the top of the second connecting rod passes through the upper mold and connects to the second coupling.

[0009] Preferably, the lower die is provided with a C-material feeding channel and a C-material primary flow stabilizing groove arranged sequentially from back to front. The C-material primary flow stabilizing groove is connected to the C-material extrusion channel, and a C-material secondary flow stabilizing groove is provided in the C-material extrusion channel.

[0010] Preferably, the top surface of the upper mold is provided with a series of D-material feeding components along the width direction. A primary flow channel for D-material is provided in the upper mold corresponding to each D-material feeding component. A secondary flow channel for D-material is provided in the upper middle mold and communicates with the primary flow channel for D-material, which also communicates with the secondary flow channel for D-material. A tertiary flow channel for D-material is provided in the lower middle mold and communicates with the secondary flow channel for D-material, which also communicates with the primary flow channel for C-material. The tertiary flow channel for D-material is connected to the primary flow stabilizing groove for C-material.

[0011] Preferably, the upper mold is provided with an A material feeding channel and an A material flow stabilizing groove from back to front, and the A material flow stabilizing groove and the A material extrusion channel are connected.

[0012] Preferably, the lower die is provided with a B material feeding channel and a B material flow stabilizing groove from back to front, and the B material flow stabilizing groove and the B material extrusion channel are connected.

[0013] Preferably, the lifting mechanism for material A and material B is replaced by a servo motor closed-loop control.

[0014] This invention, by setting up three independent and controllable flow channels, a layered dedicated adjustment mechanism, and a switchable closed-loop motor control for the upper and middle layers, combined with an irregularly shaped coating and molding structure, can flexibly realize multiple functions such as full-surface coating of the same slurry, layered coating of three different slurries, synchronous layered coating of three colors, and differentiated coating of irregularly shaped segments, effectively solving various production pain points and quality shortcomings of existing technologies. Attached Figure Description

[0015] Figure 1 This is a schematic diagram of the structure from the front view of the present invention; Figure 2 This is a structural schematic diagram of the invention from a rear view. Figure 3 This is a rear view of the present invention; Figure 4 for Figure 3 A cross-sectional view along the AA direction; Figure 5 for Figure 3 A cross-sectional view along the BB direction; Figure 6 for Figure 3 A sectional view of the tie rod installed along the CC direction; Wherein: 1—Upper die; 1a—A material feed channel; 1b—A material flow stabilizer; 2—Upper middle die; 3—Lower middle die; 31—B material feed channel; 32—B material flow stabilizer; 4—Lower die; 41—Deformation section; 42—Deformation groove; 43—C material feed channel; 44—C material primary flow stabilizer; 5—A material extrusion channel; 6—Upper layer gasket; 7—B material extrusion channel; 8—Middle layer gasket; 9—C material extrusion channel; 91—C material secondary flow stabilizer; 10—Lower layer gasket; 11—A material adjusting block; 11 1—First connecting rod; 12—A material adjusting block lifting mechanism; 121—First micrometer screw lifting mechanism; 122—First lifting screw; 123—First coupling; 13—B material adjusting block; 131—Second connecting rod; 14—B material adjusting block lifting mechanism; 141—Second micrometer screw lifting mechanism; 142—Second lifting screw; 143—Second coupling; 15—D material feeding assembly; 151—D material primary flow channel; 152—D material secondary flow channel; 153—D material tertiary flow channel. Detailed Implementation

[0016] The present invention will now be described in further detail with reference to the accompanying drawings.

[0017] like Figures 1 to 6 As shown, the present invention provides a three-layer, three-adjustable irregular-shaped coating die head, characterized in that: it includes an upper die 1, an upper middle die 2, a lower middle die 3, and a lower die 4. An A-material extrusion channel 5 and an upper layer gasket 6 are provided between the upper die 1 and the upper middle die 2; a B-material extrusion channel 7 and a middle layer gasket 8 are provided between the upper middle die 2 and the lower middle die 3; a C-material extrusion channel 9 and a lower layer gasket 10 are provided between the lower middle die 3 and the lower die 4; a series of A-material adjusting blocks 11 are provided along the width direction at the A-material extrusion channel 5, and each A-material adjusting block 11 passes through the upper die 1 and is connected to an A-material adjusting block lifting mechanism 12; a series of B-material adjusting blocks 13 are provided along the width direction at the B-material extrusion channel 7, and each B-material adjusting block 13... Material adjustment block 13 passes through upper and middle mold 2 and is connected to B material adjustment block lifting mechanism 14. The front end of lower mold 4 is provided with deformation groove 42, and a thin-walled deformation part 41 is formed on the front side of deformation groove 42. The rear end face of lower mold 4 is provided with a series of adjustment holes evenly distributed along the width direction. Each adjustment hole is provided with a push rod or pull rod. The push rod or pull rod acts on the deformation part 41 of lower mold 4 to push or pull the deformation part 41 to adjust the outlet gap of C material extrusion channel 9. The front bottom of upper mold 1, the front end of upper middle mold 2, the front end of lower middle mold 3 and the top of front end of lower mold 4 are assembled to form a conical extrusion end. The A material extrusion channel 5, B material extrusion channel 7 and C material extrusion channel 9 converge at the conical extrusion end for extrusion. The upper mold 1 and upper middle mold 2 are connected and fixed by mold locking screws, the upper middle mold 2 and lower middle mold 3 are connected and fixed by mold locking screws, and the lower middle mold 3 and lower mold 4 are connected and fixed by mold locking screws.

[0018] Specifically, the A-material adjusting block lifting mechanism 12 includes a first micrometer screw lifting mechanism 121. The lower end of the first lifting screw 122 of the first micrometer screw lifting mechanism 121 is connected to a first coupling 123. A first connecting rod 111 extends from the top center of the A-material adjusting block 11. The top of the first connecting rod 111 passes through the upper mold 1 and connects to the first coupling 123. The structure of the first micrometer screw lifting mechanism 121 is consistent with the existing micrometer screw lifting structure, and will not be described in detail here. The input is obtained by rotating the knob at the tail end, which is then transmitted through the internal screw and nut mechanism to convert the screw at the front end into a micrometer-level precision linear motion.

[0019] Specifically, the B-material adjusting block lifting mechanism 14 includes a second micrometer screw lifting mechanism 141. The lower end of the second lifting screw 142 of the second micrometer screw lifting mechanism 141 is connected to a second coupling 143. A second connecting rod 131 extends from the top center of the B-material adjusting block 13. The top of the second connecting rod 131 passes through the upper die 1 and connects to the second coupling 143. The structure of the second micrometer screw lifting mechanism 141 is consistent with the existing micrometer screw lifting structure, and will not be described in detail here. The input is obtained by rotating the knob at the tail end, which is then transmitted through the internal screw and nut mechanism to convert the screw lifting at the front end into a micrometer-level precision linear motion.

[0020] Specifically, the lower die 4 is provided with a C material feeding channel 43 and a C material primary flow stabilizing groove 44 arranged sequentially from back to front. The C material primary flow stabilizing groove 44 is connected to the C material extrusion channel 9. The C material extrusion channel 9 is provided with a C material secondary flow stabilizing groove 91.

[0021] Specifically, the upper mold 1 has a series of D-material feeding components 15 arranged along its width direction on its top surface. A primary D-material flow channel 151 is provided through the upper mold 1 at each D-material feeding component 15. The upper middle mold 2 has a secondary D-material flow channel 152 connected to the primary D-material flow channel 151 and extending through the upper middle mold 2. The lower middle mold 3 has a tertiary D-material flow channel 153 connected to the secondary D-material flow channel 152 and extending through the lower middle mold 3. The tertiary D-material flow channel 153 is connected to the primary C-material flow stabilizing groove 44 through the flow channel of the lower gasket 10. The final coating shape is a planar C-material top surface with strips of D-material distributed at intervals. The width of the D-material depends on the width of the flow channel on the lower gasket 10, the quantity of D-material depends on the number of D-material feeding components 15, and the coating position of the D-material is determined by the position of the flow channel on the lower gasket 10. These layouts can be adjusted according to actual needs.

[0022] Specifically, the upper mold 1 is provided with an A material feeding channel 1a and an A material flow stabilizing groove 1b arranged sequentially from back to front. The A material flow stabilizing groove 1b is connected to the A material extrusion channel 5.

[0023] Specifically, the lower die 3 is provided with a B material feeding channel 31 and a B material flow stabilizing groove 32 arranged sequentially from back to front, and the B material flow stabilizing groove 32 is connected to the B material extrusion channel 7.

[0024] Specifically, the lifting mechanism 12 for material A and the lifting mechanism 14 for material B can also be replaced by servo motor closed-loop control to achieve automatic lifting.

[0025] Specifically, a hinge block connects the rear sides of the upper mold 1 and the upper middle mold 2, a hinge block connects the upper middle mold 2 and the lower middle mold 3, and a hinge block connects the lower middle mold 3 and the lower mold 4. After removing the locking screws between the upper mold 1 and the upper middle mold 2, the upper mold 1 can be flipped open relative to the upper middle mold 2 along the hinge block position; after removing the locking screws between the upper middle mold 2 and the lower middle mold 3, the upper middle mold 2 can be flipped open relative to the lower middle mold 3 along the hinge block position; after removing the locking screws between the lower middle mold 3 and the lower mold 4, the lower middle mold 3 can be flipped open relative to the lower mold 4 along the hinge block position. A lever insertion hole is provided on the hinge block; during manual operation, inserting a long lever into the insertion hole allows for easier flipping and opening.

[0026] In this invention, the thickness of the upper gasket 6 determines the initial gap size of the A material extrusion channel 5, the thickness of the middle gasket 8 determines the initial gap size of the B material extrusion channel 7, and the thickness of the lower gasket 10 determines the initial gap size of the C material extrusion channel 9.

[0027] In this invention, the three slurries A, B, and C can be the same slurry to achieve three-layer superposition coating and ensure the total coating thickness and accuracy, or they can be two slurries or three different slurries. These can be selected according to the specific situation, but slurry D is different from A, B, and C.

[0028] In this invention, the coating die head adopts a three-layer split independent flow channel structure (upper, middle, and lower), with each flow channel equipped with a dedicated adjustment mechanism. This allows it to adapt to various differentiated coating processing conditions, enabling both uniform coating of a single slurry with full coverage and simultaneous coating of three layers of slurries with different formulations, simultaneous superposition of three-color differentiated coatings, and segmented irregular shape coating operations. The die heads can be opened independently without interference. The upper and middle flow channels employ a micrometer control structure, allowing for manual operation or flexible switching to a closed-loop motor precision control mode. Closed-loop feedback enables micron-level gap fine-tuning and flow rate stabilization control. The lower structure uses a push-pull rod adjustment method; specifically, push rods or pull rods are connected to adjustment holes at different width positions of the lower die to adjust the die lip gap, depending on actual needs.

[0029] The above description is merely a preferred embodiment of the present invention and is not intended to limit the invention in any way. Any simple modifications, equivalent changes, or alterations made to the above embodiments based on the technical principles of the present invention shall still fall within the scope of the technical solution of the present invention.

Claims

1. A three-layer, three-adjustable irregular-shaped coating die head, characterized in that: The device includes an upper die (1), an upper middle die (2), a lower middle die (3), and a lower die (4). An A-material extrusion channel (5) and an upper layer gasket (6) are provided between the upper die (1) and the upper middle die (2). A B-material extrusion channel (7) and a middle layer gasket (8) are provided between the upper middle die (2) and the lower middle die (3). A C-material extrusion channel (9) and a lower layer gasket (10) are provided between the lower middle die (3) and the lower die (4). A series of A-material adjusting blocks (11) are provided along the width direction at the A-material extrusion channel (5). Each A-material adjusting block (11) passes through the upper die (1) and is connected to an A-material adjusting block lifting mechanism (12). A series of B-material adjusting blocks (13) are provided along the width direction at the B-material extrusion channel (7). Each B-material adjusting block (13) passes through the upper die (1) and is connected to an A-material adjusting block lifting mechanism (12). The upper middle mold (2) is connected to a B material adjustment block lifting mechanism (14). The lower mold (4) has a deformation groove (42) at its front end. A thin-walled deformation part (41) is formed on the front side of the deformation groove (42). The lower mold (4) has a series of adjustment holes evenly distributed along the width direction on its rear end face. Each adjustment hole is equipped with a push rod or a pull rod. The push rod or pull rod acts on the deformation part (41) of the lower mold (4) to push or pull the deformation part (41) to deform and adjust the outlet gap of the C material extrusion channel (9). The bottom of the front end of the upper mold (1), the front end of the upper middle mold (2), the front end of the lower middle mold (3) and the top of the front end of the lower mold (4) are assembled to form a conical extrusion end. The A material extrusion channel (5), the B material extrusion channel (7) and the C material extrusion channel (9) converge at the conical extrusion end for extrusion.

2. The three-layer, three-adjustable irregular-shaped coating die head according to claim 1, characterized in that: The A material adjusting block lifting mechanism (12) includes a first micrometer screw lifting mechanism (121). The lower end of the first lifting screw (122) of the first micrometer screw lifting mechanism (121) is connected to a first coupling (123). A first connecting rod (111) extends from the top center of the A material adjusting block (11). The top of the first connecting rod (111) passes through the upper mold (1) and is connected to the first coupling (123).

3. The three-layer, three-adjustable irregular-shaped coating die head according to claim 1, characterized in that: The B material adjusting block lifting mechanism (14) includes a second micrometer screw lifting mechanism (141). The lower end of the second lifting screw (142) of the second micrometer screw lifting mechanism (141) is connected to a second coupling (143). A second connecting rod (131) extends from the top center of the B material adjusting block (13). The top of the second connecting rod (131) passes through the upper mold (1) and is connected to the second coupling (143).

4. The three-layer, three-adjustable irregular-shaped coating die head according to claim 1, characterized in that: The lower die (4) is provided with a C material feeding channel (43) and a C material primary flow stabilizing groove (44) arranged from back to front. The C material primary flow stabilizing groove (44) is connected to the C material extrusion channel (9). The C material extrusion channel (9) is provided with a C material secondary flow stabilizing groove (91).

5. A three-layer, three-adjustable irregular-shaped coating die head according to claim 4, characterized in that: The top surface of the upper mold (1) is provided with a series of D material feeding components (15) along the width direction. A primary flow channel (151) for D material is provided in the upper mold (1) for each D material feeding component (15). A secondary flow channel (152) for D material is provided in the upper middle mold (2) and is connected to the primary flow channel (151) for D material and is connected to the secondary flow channel (152) for D material and is connected to the secondary flow channel (152) for D material and is connected to the secondary flow channel (153) for D material and is connected to the primary flow channel (44) for C material.

6. The three-layer, three-adjustable irregular-shaped coating die head according to claim 1, characterized in that: The upper mold (1) is provided with an A material feeding channel (1a) and an A material flow stabilizing groove (1b) arranged sequentially from back to front. The A material flow stabilizing groove (1b) and the A material extrusion channel (5) are connected.

7. The three-layer, three-adjustable irregular-shaped coating die head according to claim 1, characterized in that: The lower die (3) is provided with a B material feeding channel (31) and a B material flow stabilizing groove (32) arranged sequentially from back to front. The B material flow stabilizing groove (32) and the B material extrusion channel (7) are connected.

8. A three-layer, three-adjustable irregular-shaped coating die head according to claim 1, characterized in that: The lifting mechanism (12) for material A and the lifting mechanism (14) for material B are replaced with closed-loop control of servo motors.

9. A three-layer, three-adjustable irregular-shaped coating die head according to claim 1, characterized in that: A hinge block is connected between the rear sides of the upper mold (1) and the upper middle mold (2), a hinge block is connected between the upper middle mold (2) and the lower middle mold (3), and a hinge block is connected between the lower middle mold (3) and the lower mold (4).

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