Alkaline electrolyzed water coating die head

Abstract

The alkaline electrolyzed water coating die head comprises an upper die, a lower die and a gasket which is located between the upper die and the lower die and used for adjusting the thickness, the upper die, the lower die and the gasket are connected into a whole through a die locking screw, a die lip and a die lip gap adjusting mechanism are arranged at the front end of the upper die, and an extrusion channel is formed between the front portions of the upper die and the lower die. The die is characterized in that the lower die is provided with a feeding channel, the rear end of the feeding channel penetrates through the rear side face of the lower die, a first-stage buffer groove is formed in the top face of the front portion of the lower die in the breadth direction, and the bottom of the first-stage buffer groove is communicated with the front end of the feeding channel; an exhaust hole is vertically formed in the upper die above the first-stage buffer groove in a penetrating manner, and a second-stage buffer groove arranged in the breadth direction is formed in the top surface, located on the front side of the first-stage buffer groove, of the lower die. The coating thickness precision of the extrusion channel in different breadth directions can be guaranteed, air mixed in raw materials is discharged, and bubbles are eliminated.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of coating die, in particular to a basic electrolytic water coating die. BACKGROUND

[0002] The basic electrolytic water coating die is used for producing basic electrolytic water tank diaphragm, and the basic electrolytic water diaphragm substrate is polyphenylene sulfide (PPS). A slurry containing zirconium dioxide and a polymer is coated on the substrate surface to form a uniform and dense coating.

[0003] At present, the straightness and flatness of the lip portion of the die and the flatness of the gasket are difficult to reach the ideal state due to the machining capability, and there is a slight error. Meanwhile, the large-width die is affected by gravity and plastically deformed after being hoisted. The above problems will cause slight deformation of the lip portion, thereby affecting the uniformity of the coating thickness and causing the coating thickness precision to exceed the allowable value. Air is easily mixed in the coating slurry at a high coating line speed, forming bubbles and reducing the coating quality. SUMMARY

[0004] In view of the above problems, the present application aims to provide a basic electrolytic water coating die which can ensure the coating thickness precision of the extrusion channel in different width directions and discharge the air mixed in the raw material to eliminate bubbles.

[0005] The technical scheme of the present application is a basic electrolytic water coating die, which comprises an upper die, a lower die and a gasket for adjusting the thickness between the two, the three being connected as a whole by locking screws. The front end of the upper die is provided with a die lip and a die lip gap adjusting mechanism. An extrusion channel is formed between the front portions of the upper die and the lower die, and the height of the extrusion channel corresponds to the thickness of the gasket. The lower die is provided with a feeding channel, the rear end of which penetrates the rear side of the lower die. A first-stage buffer groove is arranged along the width direction on the top surface of the front portion of the lower die. The bottom of the first-stage buffer groove is in communication with the front end of the feeding channel. An exhaust hole is vertically arranged in the upper die above the first-stage buffer groove. A second-stage buffer groove is arranged along the width direction on the top surface of the front portion of the lower die. The raw material enters the first-stage buffer groove through the feeding channel and is discharged through the exhaust hole. After the first-stage buffer groove is filled with the raw material, the raw material flows to the second-stage buffer groove in front. The raw material is uniformly extruded from the extrusion channel after being stably buffered twice.

[0006] Preferably, a plurality of adjusting blocks are connected to the rear side of the upper die and the lower die along the width direction by screws. The inner side surface of the lower portion of the adjusting block is in contact with the lower die. The inner side surface of the upper portion of the adjusting block is in contact with the upper die through an adjusting gasket. The distance by which the upper die is offset forward relative to the lower die is equal to the thickness of the adjusting gasket. The offset distance corresponds to the distance by which the front end of the upper die protrudes relative to the front end of the lower die. Different thicknesses of adjusting gaskets are used to adjust different distances by which the upper die is offset forward relative to the lower die.

[0007] Preferably, the lower mold rear side is connected with a plurality of hinged seats along the width direction, the upper mold rear side is connected with a hinged frame corresponding to the hinged seat position, the hinged frame is hinged on the hinged seat through a hinge shaft, and the upper mold top surface is vertically connected with left and right two pull rods.

[0008] Preferably, the die lip gap adjusting mechanism comprises a deformation groove arranged on the upper mold front side, a threaded mounting hole located above the deformation groove, an adjusting nut threadedly connected in the threaded mounting hole, and an adjusting screw threadedly connected in the adjusting nut inner hole, the outer thread pitch of the adjusting nut is greater than the inner thread pitch, the adjusting screw front end is threadedly connected at the die lip after passing through the deformation groove, and rotation of the adjusting nut causes the adjusting screw to advance or retreat through thread differential to deform the die lip, thereby adjusting the gap of the extrusion channel.

[0009] Preferably, the front and rear widths and the depth of the primary buffer groove are greater than the front and rear widths and the depth of the secondary buffer groove, and the thickness of the slit flow channel between the primary buffer groove and the secondary buffer groove corresponds to the thickness of the gasket.

[0010] Preferably, the feeding channel is located in the middle region of the lower mold, the raw material spreads to the left and right sides after entering the primary buffer groove from the feeding channel, the number of exhaust holes is three, and the left and right two exhaust holes are located at the left and right ends of the primary buffer groove.

[0011] The present application can ensure the coating thickness accuracy of the extrusion channel in different width directions, discharge the mixed air in the raw material, eliminate air bubbles, and rotate the upper mold to open after the mold locking screw is disassembled, in addition, the upper mold can be moved forward relative to the lower mold, the surface tension of the slurry after extrusion forms larger small liquid beads, the storage of the die lip port is increased, and air is prevented from being mixed. BRIEF DESCRIPTION OF DRAWINGS

[0012] Figure 1 It is a structural schematic diagram of the present application;

[0013] Figure 2 It is Figure 1 It is a structural schematic diagram of another view;

[0014] Figure 3 It is an exploded structural schematic diagram of the present application;

[0015] Figure 4 It is an internal cross-sectional structural schematic diagram of the present application;

[0016] Wherein: 1—Upper die; 1a—Die lip; 1b—Ventilation hole; 1c—Deformation groove; 1d—Threaded mounting hole; 2—Lower die; 21—Feed channel; 22—Primary buffer groove; 23—Secondary buffer groove; 3—Shim; 4—Die locking screw; 5—Die lip gap adjustment mechanism; 51—Adjusting nut; 52—Adjusting screw; 6—Extrusion channel; 7—Adjusting block; 8—Adjusting shim; 9—Hinge seat; 10—Hinge frame; 11—Hinge shaft; 12—Tie rod. Detailed Implementation

[0017] The present invention will now be described in further detail with reference to the accompanying drawings.

[0018] like Figures 1 to 4 As shown, this invention provides an alkaline electrolytic water coating die head, including an upper die 1, a lower die 2, and a shim 3 located between them for thickness adjustment. These three components are connected as a single unit by a locking screw 4. The upper die 1 has a die lip 1a and a die lip gap adjustment mechanism 5 at its front end. An extrusion channel 6 is formed between the front parts of the upper die 1 and the lower die 2, and the height of the extrusion channel 6 corresponds to the thickness of the shim 3. The lower die 2 has a feeding channel 21, the rear end of which extends through the rear side of the lower die 2. A [missing information - likely a design element] is provided on the top surface of the front part of the lower die 2 along the width direction. The first-stage buffer trough 22 is connected to the bottom of the feed channel 21. The upper mold 1 above the first-stage buffer trough 22 is vertically provided with an exhaust hole 1b. The lower mold 2 is located on the top surface in front of the first-stage buffer trough 22 and is provided with a second-stage buffer trough 23 arranged along the width direction. The raw material enters the first-stage buffer trough 22 through the feed channel 21 and is vented through the exhaust hole 1b. After the raw material fills the first-stage buffer trough 22, it flows forward to the second-stage buffer trough 23. After two stable flow buffering cycles, the raw material is evenly extruded from the extrusion channel 6.

[0019] In the above scheme, the rear sides of the upper mold 1 and the lower mold 2 are connected by screws to a plurality of adjusting blocks 7 along the width direction. The inner side of the lower part of the adjusting block 7 contacts the lower mold 2, and the inner side of the upper part of the adjusting block 7 contacts the upper mold 1 through adjusting shims 8. The distance by which the upper mold 1 is offset forward relative to the lower mold 2 is equal to the thickness of the adjusting shim 8. This offset distance corresponds to the distance that the front end of the upper mold 1 extends relative to the front end of the lower mold 2. Adjusting shims 8 of different thicknesses is used to adjust the different distances by which the upper mold 1 is offset forward relative to the lower mold 2.

[0020] In addition, the rear side of the lower mold 2 is connected with multiple hinge seats 9 along the width direction, and the rear side of the upper mold 1 is connected with a hinge frame 10 corresponding to the hinge seat 9. The hinge frame 10 is hinged to the hinge seat 9 through the hinge shaft 11. The top surface of the upper mold 1 is vertically connected with two pull rods 12 on the left and right. Pulling the pull rods 12 backward causes the upper mold 1 to flip and open relative to the lower mold 2 along the hinge shaft 11 through the lever principle.

[0021] In addition, the die lip gap adjusting mechanism 5 comprises a deformation groove 1c arranged on the front side of the upper die 1, a threaded mounting hole 1d above the deformation groove 1c, an adjusting nut 51 threaded in the threaded mounting hole 1d, an adjusting screw 52 threaded in the inner hole of the adjusting nut 51, the outer thread pitch of the adjusting nut 51 being larger than the inner thread pitch, the front end of the adjusting screw 52 being threaded at the die lip 1a after passing through the deformation groove 1c, and the rotation of the adjusting nut 51 making the adjusting screw 52 advance or retreat through differential thread, so as to deform the die lip 1a, and further adjust the gap of the extrusion channel 6, the outer thread pitch of the adjusting nut 51 being m and the inner thread pitch being n, and the distance of the adjusting screw 52 advancing or retreating being m-n when the adjusting nut 51 rotates one circle.

[0022] Specifically, the front and back width and depth of the first buffer groove 22 are greater than the front and back width and depth of the second buffer groove 23, and the thickness of the slit flow channel between the first buffer groove 22 and the second buffer groove 23 corresponds to the thickness of the gasket 3.

[0023] Further, the feeding channel 21 is located in the middle region of the lower die 1, the raw material spreads to the left and right sides after entering the first buffer groove 22 from the feeding channel 21, the number of the exhaust holes 1b is three, and they are respectively located in the left, middle and right regions of the upper die 1, wherein the bottom of the left and right two exhaust holes 1b is located at the left and right ends of the first buffer groove 22.

[0024] In the present application, the raw material enters the inside of the lower die 2 from the feeding channel 21 in the middle of the lower die 2, reaches the bottom of the first buffer groove 22, spreads to the left and right sides in the process of filling up, fills up the whole first buffer groove 22, in this process, the air is discharged through the forward channel and the exhaust holes 1b, the raw material flows to the slit channel on the front side after overflowing the first buffer groove 22, enters the second buffer groove 23 and fills it up, and the velocity vector in the forward direction tends to be consistent at different positions in the width direction in the second buffer groove 23, is uniformly extruded from the forward extrusion channel 6 after being buffered again, ensures the uniform extrusion of the raw material in the whole width direction, and finally is uniformly coated on the substrate through the die lip gap to form a dense coating. The mixed air bubbles are discharged through the exhaust holes 1b in time in the extrusion process. The gap of the extrusion channel 6 is adjusted by rotating the adjusting nut 51, making the adjusting screw 52 advance or retreat through differential thread, so as to adjust the size of the gap of the extrusion channel 6. When the mold is opened, only the locking screw 4 needs to be removed, and the pull rod 12 is pulled backward to make the upper die 1 flip and open relative to the lower die 2 along the hinge shaft 11 through the lever principle. The adjusting gasket 8 with a specific thickness can make the die lip of the upper die 1 slightly exceed the lower die 2, forming a structure similar to a roof, which can form larger small liquid beads when the fluid flows through the die lip, and can effectively prevent air from entering the coating to produce bubbles.

[0025] The above is only the preferred embodiment of the present application, and does not limit the present application in any form. Any simple modification, equivalent change or modification made to the above embodiment according to the technical principle of the present application still falls within the scope of the technical solution of the present application.

Claims

1. A basic electrolytic water coating die, comprising an upper die (1), a lower die (2) and a gasket (3) between the two to adjust the thickness, the three being connected as a whole by a locking screw (4), the upper die (1) being provided with a die lip (1a) at the front end and a die lip gap adjusting mechanism (5), an extrusion channel (6) being formed between the front parts of the upper die (1) and the lower die (2), the height of the extrusion channel (6) corresponding to the thickness of the gasket (3), characterized in that: The lower die (2) is provided with a feeding channel (21) which penetrates through the rear side of the lower die (2) at the rear end, and a first buffer groove (22) is arranged on the top surface of the front part of the lower die (2) along the width direction, the bottom of the first buffer groove (22) is communicated with the front end of the feeding channel (21), and the upper die (1) above the first buffer groove (22) is vertically provided with an exhaust hole (1b), and the top surface of the lower die (2) at the front side of the first buffer groove (22) is provided with a second buffer groove (23) arranged along the width direction.

2. The alkaline electrolyzed water coating die of claim 1, wherein: The rear side of the upper die (1) and the lower die (2) is connected with a plurality of adjusting blocks (7) along the width direction through screws, the inner side surface of the lower part of the adjusting block (7) is in contact with the lower die (2), the inner side surface of the upper part of the adjusting block (7) is in contact with the upper die (1) through an adjusting gasket (8), the distance by which the upper die (1) is offset forward relative to the lower die (2) is equal to the thickness of the adjusting gasket (8), and the offset distance corresponds to the distance by which the front end of the upper die (1) protrudes relative to the front end of the lower die (2), and different thicknesses of the adjusting gasket (8) are replaced to adjust different distances by which the upper die (1) is offset forward relative to the lower die (2).

3. The alkaline electrolyzed water coating die of claim 1, wherein: The rear side of the lower die (2) is connected with a plurality of hinged seats (9) along the width direction, the rear side of the upper die (1) is connected with a hinged frame (10) at positions corresponding to the hinged seats (9), the hinged frame (10) is hinged on the hinged seat (9) through a hinge shaft (11), and the top surface of the upper die (1) is vertically connected with left and right two pull rods (12), and pulling the pull rod (12) backward makes the upper die (1) flip backward and open relative to the lower die (2) along the hinge shaft (11) through the lever principle.

4. The alkaline electrolyzed water coating die of claim 1, wherein: The die lip gap adjusting mechanism (5) comprises a deformation groove (1c) arranged on the front side of the upper die (1), a threaded mounting hole (1d) located above the deformation groove (1c), an adjusting nut (51) threadedly connected in the threaded mounting hole (1d), and an adjusting screw (52) threadedly connected in the inner hole of the adjusting nut (51), the outer thread pitch of the adjusting nut (51) is greater than the inner thread pitch, the front end of the adjusting screw (52) penetrates through the deformation groove (1c) and is threadedly connected at the die lip (1a), and rotating the adjusting nut (51) makes the adjusting screw (52) advance or retreat through thread differential to make the die lip (1a) deform, thereby adjusting the gap of the extrusion channel (6).

5. The alkaline electrolyzed water coating die of claim 1, wherein: The front and rear width and depth of the first buffer groove (22) are greater than the front and rear width and depth of the second buffer groove (23), and the thickness of the gap flow channel between the first buffer groove (22) and the second buffer groove (23) corresponds to the thickness of the gasket (3).

6. The alkaline electrolytic water coating die of claim 1, wherein: The feeding channel (21) is located in the middle area of the lower die (2), the raw material enters the first buffer groove (22) from the feeding channel (21) and diffuses to the left and right sides, the exhaust hole (1b) is located at the positions close to the end of the left and right ends of the upper die (1), and the bottom of the exhaust hole (1b) is located at the left and right ends of the first buffer groove (22).

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