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 invention relates to the technical field of coating die heads, in particular to an alkaline electrolyzed water coating die head. Background Art

[0002] The alkaline electrolytic water coating die head is used to produce alkaline electrolytic water tank diaphragms. The base material of the alkaline electrolytic water diaphragm is polyphenylene sulfide (PPS). A slurry containing zirconium dioxide and polymer is coated on the surface of the base material to form a uniform and dense coating.

[0003] The current die head is limited by the machining capacity. The straightness and flatness of the lip and the flatness of the gasket are difficult to achieve the ideal state, with slight errors. At the same time, the wide die head undergoes plastic deformation due to gravity after hoisting. The above problems will cause slight deformation at the lip, thus affecting the uniformity of the coating thickness and causing the coating thickness accuracy to exceed the allowable value. At higher coating line speeds, air is easily mixed into the coating slurry, forming bubbles that reduce the coating quality. Summary of the invention

[0004] In view of the above problems, the present invention aims to provide an alkaline electrolyzed water coating die head, which can ensure the coating thickness accuracy of the extrusion channel in different width directions, discharge the air mixed in the raw materials, and eliminate bubbles.

[0005] The technical solution of the present invention is an alkaline electrolyzed water coating die head, comprising an upper die, a lower die and a gasket for adjusting the thickness located between the two, the above three are connected as a whole by a locking screw, the front end of the upper die is provided with a die lip and a die lip gap adjustment mechanism, an extrusion channel is formed between the front parts of the upper die and the lower die, and the height of the extrusion channel corresponds to the thickness of the gasket, and is characterized in that: the lower die is provided with a feed channel, the rear end of the feed channel passes through the rear side surface of the lower die, a primary buffer groove is provided on the top surface of the front part of the lower die along the width direction, the bottom of the primary buffer groove is connected to the front end of the feed channel, the upper die above the primary buffer groove is vertically penetrated with an exhaust hole, and the top surface of the lower die located on the front side of the primary buffer groove is provided with a secondary buffer groove arranged along the width direction; the raw material enters the primary buffer groove through the feed channel to fill the primary buffer groove and is exhausted through the exhaust hole, and the raw material flows to the secondary buffer groove in front after filling the primary buffer groove, and the raw material is evenly extruded from the extrusion channel after two steady flow buffering.

[0006] Preferably, the rear sides of the upper mold and the lower mold are connected with multiple adjustment blocks by screws along the width direction, the inner side surface of the lower part of the adjustment block contacts the lower mold, and the inner side surface of the upper part of the adjustment block contacts the upper mold through the adjustment gasket. The distance that the upper mold is offset forward relative to the lower mold is equal to the thickness of the adjustment gasket, and the offset distance corresponds to the distance that the front end of the upper mold extends relative to the front end of the lower mold. Adjustment gaskets of different thicknesses are replaced to adjust different distances of the forward offset of the upper mold relative to the lower mold.

[0007] Preferably, the rear side surface of the lower mold is connected with multiple hinged seats along the width direction, and the rear side surface of the upper mold is connected with a hinged frame corresponding to the position of the hinged seat. The hinged frame is hinged on the hinged seat through a hinge axis, and the top surface of the upper mold is vertically connected with two left and right pull rods. Pulling the pull rods backwards allows the upper mold to flip backward and open relative to the lower mold along the hinge axis through the lever principle.

[0008] Preferably, the die lip gap adjustment mechanism includes a deformation groove arranged on the front side of the upper die, 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 inner hole of the adjusting nut. The pitch of the outer thread of the adjusting nut is greater than the pitch of the inner thread. After the front end of the adjusting screw passes through the deformation groove, it is threadedly connected to the die lip. Rotating the adjusting nut advances or retreats the adjusting screw through thread differential to deform the die lip, thereby adjusting the gap of the extrusion channel.

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

[0010] Preferably, the feed channel is located in the middle area of ​​the lower mold, and the raw material enters the feed channel and reaches the primary buffer tank and diffuses to the left and right sides. There are three exhaust holes, which are respectively located in the left, middle and right areas of the upper mold, among which the bottoms of the left and right exhaust holes are located at the left and right ends of the primary buffer tank.

[0011] The present invention can ensure the coating thickness accuracy of the extrusion channel in different width directions, and discharge the air mixed in the raw materials to eliminate bubbles. The upper mold can be rotated and opened after the locking screws are removed. In addition, the upper mold can be moved forward and protruded relative to the lower mold. After extrusion, the surface tension of the slurry is used to form larger liquid droplets, increase the material storage at the die lip, and avoid air mixing. BRIEF DESCRIPTION OF THE DRAWINGS

[0012] Figure 1 It is a structural schematic diagram of the present invention; Figure 2 for Figure 1 A schematic diagram of the structure from another perspective; Figure 3 It is a schematic diagram of the decomposition structure of the present invention; Figure 4 It is a schematic diagram of the internal cross-sectional structure of the present invention; Among them: 1—upper die; 1a—die lip; 1b—exhaust hole; 1c—deformation groove; 1d—threaded mounting hole; 2—lower die; 21—feed channel; 22—primary buffer groove; 23—secondary buffer groove; 3—gasket; 4—locking screw; 5—die lip gap adjustment mechanism; 51—adjusting nut; 52—adjusting screw; 6—extrusion channel; 7—adjusting block; 8—adjusting gasket; 9—articulated seat; 10—articulated frame; 11—articulated shaft; 12—pull rod. DETAILED DESCRIPTION

[0013] The present invention will be further described in detail below in conjunction with the accompanying drawings.

[0014] like Figures 1 to 4 As shown, the present invention provides an alkaline electrolyzed water coating die head, including an upper die 1, a lower die 2 and a gasket 3 for adjusting the thickness located between the upper die 1 and the lower die 2, the three being connected as a whole by a locking screw 4, the front end of the upper die 1 being provided with a die lip 1a and a die lip gap adjustment 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, the lower die 2 being provided with a feed channel 21, the rear end of the feed channel 21 passing through the rear side of the lower die 2, and the front top surface of the lower die 2 being provided with a The first-level buffer groove 22 is connected to the front end of the feed channel 21 at the bottom of the first-level buffer groove 22. The upper mold 1 above the first-level buffer groove 22 is vertically penetrated with an exhaust hole 1b. The top surface of the lower mold 2 located in front of the first-level buffer groove 22 is provided with a secondary buffer groove 23 arranged along the width direction; the raw material enters the first-level buffer groove 22 through the feed channel 21 to fill the first-level buffer groove 22 and is exhausted through the exhaust hole 1b. After the raw material fills the first-level buffer groove 22, it flows to the second-level buffer groove 23 in front. After two steady flow buffering, the raw material is evenly extruded from the extrusion channel 6.

[0015] In the above scheme, the rear sides of the upper mold 1 and the lower mold 2 are connected with multiple adjustment blocks 7 by screws along the width direction, the inner side surface of the lower part of the adjustment block 7 contacts the lower mold 2, and the inner side surface of the upper part of the adjustment block 7 contacts the upper mold 1 through the adjustment gasket 8. The distance that the upper mold 1 is offset forward relative to the lower mold 2 is equal to the thickness of the adjustment gasket 8, and the 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. Adjustment gaskets 8 of different thicknesses are replaced to adjust different distances of the forward offset of the upper mold 1 relative to the lower mold 2.

[0016] In addition, the rear side surface of the lower mold 2 is connected to multiple articulated seats 9 along the width direction, and the rear side surface of the upper mold 1 is connected to an articulated frame 10 corresponding to the position of the articulated seat 9. The articulated frame 10 is hinged on the articulated seat 9 through a hinge axis 11. The top surface of the upper mold 1 is vertically connected to two left and right pull rods 12. Pulling the pull rods 12 backwards allows the upper mold 1 to flip backward and open relative to the lower mold 2 along the hinge axis 11 through the lever principle.

[0017] In addition, the die lip gap adjustment mechanism 5 includes 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 pitch of the external thread of the adjusting nut 51 is greater than the pitch of the internal thread. The front end of the adjusting screw 52 passes through the deformation groove 1c and is threadedly connected to the die lip 1a. The adjusting nut 51 is rotated to move the adjusting screw 52 forward or backward through the thread differential to deform the die lip 1a, thereby adjusting the gap of the extrusion channel 6. The pitch of the external thread of the adjusting nut 51 is m, and the pitch of the internal thread is n. When the adjusting nut 51 is rotated one circle, the forward or backward distance of the adjusting screw 52 is mn.

[0018] Specifically, the front-to-rear width and depth of the primary buffer groove 22 are greater than the front-to-rear width and depth of the secondary buffer groove 23 , and the thickness of the slit channel between the primary buffer groove 22 and the secondary buffer groove 23 corresponds to the thickness of the gasket 3 .

[0019] Furthermore, the feed channel 21 is located in the middle area of ​​the lower mold 1. After the raw material enters the primary buffer groove 22 from the feed channel 21, it diffuses to the left and right sides. There are three exhaust holes 1b, which are respectively located in the left, middle and right areas of the upper mold 1. The bottoms of the left and right exhaust holes 1b are located at the left and right ends of the primary buffer groove 22.

[0020] In the present invention, the raw material enters the lower mold 2 from the feed channel 21 in the middle of the lower mold 2 and reaches the bottom of the primary buffer tank 22. The raw material keeps diffusing to the left and right sides while filling up, filling the entire primary buffer tank 22. In this process, the air is discharged from the front channel and through the exhaust hole 1b. After the raw material overflows the primary buffer tank 22, it flows to the slit channel on the front side, enters the secondary buffer tank 23 and fills it up, and the velocity vectors in the forward direction at different positions along the width direction in the secondary buffer tank 23 tend to be consistent. After buffering again, it is uniformly extruded from the front extrusion channel 6 to ensure uniform extrusion of the raw material in the entire width direction, and finally evenly coated on the substrate through the lip gap to form a dense coating. During the extrusion process, the mixed bubbles are discharged in time through the exhaust hole 1b. The gap of the extrusion channel 6 is adjusted by rotating the adjusting nut 51, and the adjusting screw 52 is moved forward or backward by differential means to adjust the gap size of the extrusion channel 6. When removing the mold, it is only necessary to remove the locking screw 4, pull the pull rod 12 backwards, and use the lever principle to flip the upper mold 1 backwards along the hinge axis 11 relative to the lower mold 2 to open. The adjusting gasket 8 of a specific thickness can make the lip of the upper mold 1 slightly exceed the lower mold 2, forming a structure similar to an eaves, which can form larger liquid beads when the fluid flows through the lip, and can effectively prevent air from entering the coating to generate bubbles.

[0021] The above description is only a preferred embodiment of the present invention and does not impose any form of limitation on the invention. Any simple modification, equivalent change or modification made to the above embodiments based on the technical principle of the present invention still falls within the scope of the technical solution of the present invention.

Claims

1. An alkaline electrolyzed water coating die head, comprising an upper die (1), a lower die (2) and a thickness adjusting gasket (3) located between the upper die (1), the three being connected as a whole by a locking screw (4), the front end of the upper die (1) being provided with a die lip (1a) 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 feed channel (21), the rear end of the feed channel (21) passes through the rear side surface of the lower die (2), a primary buffer groove (22) is provided on the front top surface of the lower die (2) along the width direction, the bottom of the primary buffer groove (22) is connected to the front end of the feed channel (21), an exhaust hole (1b) is vertically penetrated through the upper die (1) above the primary buffer groove (22), and a secondary buffer groove (23) arranged along the width direction is provided on the top surface of the lower die (2) located in front of the primary buffer groove (22); the raw material enters the primary buffer groove (22) through the feed channel (21) to fill the primary buffer groove and is exhausted through the exhaust hole (1b), and after the primary buffer groove (22) is filled, the raw material flows to the secondary buffer groove (23) in front, and the raw material is evenly extruded from the extrusion channel (6) after two steady flow bufferings.

2. An alkaline electrolyzed water coating die according to claim 1, characterized in that: The rear side surfaces of the upper mold (1) and the lower mold (2) are connected with a plurality of adjustment blocks (7) by screws in the width direction, the inner side surface of the lower part of the adjustment block (7) contacts the lower mold (2), and the inner side surface of the upper part of the adjustment block (7) contacts the upper mold (1) through the adjustment gasket (8). The distance that the upper mold (1) is offset forward relative to the lower mold (2) is equal to the thickness of the adjustment gasket (8), and the 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). Adjustment gaskets (8) of different thicknesses are replaced to adjust the different distances that the upper mold (1) is offset forward relative to the lower mold (2).

3. An alkaline electrolyzed water coating die according to claim 1, characterized in that: The rear side surface of the lower mold (2) is connected to a plurality of hinged seats (9) along the width direction, and the rear side surface of the upper mold (1) is connected to a hinged frame (10) at a position corresponding to the hinged seat (9). The hinged frame (10) is hinged to the hinged seat (9) via a hinge axis (11), and the top surface of the upper mold (1) is vertically connected to two left and right pull rods (12). Pulling the pull rods (12) backwards causes the upper mold (1) to flip backward and open relative to the lower mold (2) along the hinge axis (11) through the lever principle.

4. An alkaline electrolyzed water coating die according to claim 1, characterized in that: The die lip gap adjustment 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 adjustment nut (51) threadedly connected in the threaded mounting hole (1d), and an adjustment screw (52) threadedly connected in the inner hole of the adjustment nut (51); the pitch of the external thread of the adjustment nut (51) is greater than the pitch of the internal thread; the front end of the adjustment screw (52) passes through the deformation groove (1c) and is threadedly connected to the die lip (1a); the adjustment nut (51) is rotated to cause the adjustment screw (52) to move forward or backward through thread differential, thereby deforming the die lip (1a) and adjusting the gap of the extrusion channel (6).

5. An alkaline electrolyzed water coating die according to claim 1, characterized in that: The front-to-rear width and depth of the primary buffer groove (22) are greater than the front-to-rear width and depth of the secondary buffer groove (23), and the thickness of the slit flow channel between the primary buffer groove (22) and the secondary buffer groove (23) corresponds to the thickness of the gasket (3).

6. An alkaline electrolyzed water coating die according to claim 1, characterized in that: The feed channel (21) is located in the middle area of ​​the lower mold (1); the raw material enters the feed channel (21) and reaches the primary buffer groove (22) before diffusing to the left and right sides; the exhaust holes (1b) are located at positions close to the ends of the left and right ends of the upper mold (1); and the bottoms of the exhaust holes (1b) are located at the left and right ends of the primary buffer groove (22).

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