Coating mold for PVA (polyvinyl alcohol) film production

Abstract

The utility model discloses a coating mould for PVA (polyvinyl alcohol) film production, which comprises an upper mould, a lower mould and a gasket, the upper mould is fixedly connected with the lower mould, the gasket is arranged between the upper mould and the lower mould, and the same sides of the upper mould and the lower mould are matched to form a mould lip. The lower die is provided with an ultrasonic device, and an inner cavity is formed in the lower die. And the slurry is vibrated and homogenized in the inner cavity by using ultrasonic waves. The inner cavity is of a V-shaped structure, and a feeding port is formed in the bottom of the inner cavity and communicated with the feeding pipeline. Slurry is shunted through the feeding pipeline, and the flow speed of the slurry is slowed down through the V-shaped structure. A detachable adjusting plate is arranged in the inner cavity, a pre-through opening is formed by the adjusting plate and the inner cavity, and the pre-through opening is communicated with the die lip and the inner cavity. By using the device, the slurry can be uniformly distributed in the inner cavity, the slurry is uniformly discharged, and the overall quality of the PVA film is improved.

Description

Technical Field

[0001] The utility model relates to the technical field of coating, in particular to a coating mould for producing a PVA film. Background Art

[0002] In the production process of PVA film, a coating machine is needed to evenly distribute the PVA slurry onto the material strip, thereby forming a thin and uniform PVA film. PVA slurry is generally applied through the film head on the coating machine. The die head is generally composed of an upper die and a lower die, and the slurry flows out of the die head through the gap between the upper die and the lower die. However, in reality, the pressure of the slurry in each part of the die head is uneven. When the slurry flows out from the gap between the upper die and the lower die, the slurry discharge is uneven, affecting the overall quality of the PVA film. Utility Model Content

[0003] In order to solve the above technical problems, the utility model provides a coating mold for producing a PVA film.

[0004] The technical solution of the utility model is: a coating mold for the production of PVA film, including an upper mold, a lower mold and a gasket, the upper mold is fixedly connected to the lower mold, a gasket is arranged between the upper mold and the lower mold, and the same side of the upper mold and the lower mold cooperate to form a die lip. The lower mold is provided with an ultrasonic device, an inner cavity is arranged in the lower mold, the inner cavity is in a V-shaped structure, a feed port is arranged at the bottom of the inner cavity, and the feed port is connected to a feed pipe; a detachable adjustment plate is arranged inside the inner cavity, and the adjustment plate and the inner cavity form a pre-opening, and the pre-opening is connected to the die lip and the inner cavity.

[0005] Furthermore, the upper die is provided with a plurality of fixing bolts, and the lower die is provided with threaded holes matching the fixing bolts, and the fixing bolts pass through the upper die and are screwed into the threaded holes.

[0006] Furthermore, the feed pipeline includes a branch pipe and a main pipe, and the main pipe is provided with a plurality of branch pipes, and the branch pipes are connected with the feed port.

[0007] Furthermore, protrusions are provided at both ends of the adjustment plate, and grooves matching the protrusions are provided on the inner cavity; and a second sealing gasket is provided on one side of the adjustment plate where the protrusions are provided.

[0008] Furthermore, a detachable first sealing gasket is provided on one side of the adjustment plate away from the pre-opening; a protrusion is provided on the first sealing gasket, and a positioning groove matching the protrusion is provided in the inner cavity.

[0009] Furthermore, a slope is provided on one side of the adjustment plate close to the pre-opening.

[0010] Furthermore, both ends of the lower mold are provided with an ultrasonic device, which includes a vibration rod and a generator. The generator is arranged on the outer wall of the lower mold, and a vibration rod is arranged on the generator. The vibration rod passes through the lower mold and enters into the inner cavity.

[0011] Compared with the prior art, the utility model has the advantages that the slurry enters the inner cavity through the feed pipe from the feed port at the bottom of the lower mold, so that the slurry is evenly distributed to various parts of the inner cavity. The ultrasonic device vibrates the slurry in the inner cavity to make the slurry evenly distributed. The regulating plate keeps the slurry out of the mold flow rate consistent to prevent uneven distribution of the slurry out of the mold. BRIEF DESCRIPTION OF THE DRAWINGS

[0012] In order to more clearly illustrate the embodiments of the utility model or the technical solutions in the prior art, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the utility model. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative work.

[0013] Figure 1 It is an overall schematic diagram of the utility model;

[0014] Figure 2 It is a cross-sectional schematic diagram of the utility model;

[0015] Figure 3 This is a schematic diagram of the lower mold of the utility model;

[0016] Figure 4 for Figure 3 The enlarged view of point A in the middle;

[0017] Figure 5 This is a schematic diagram of the adjustment plate of the utility model;

[0018] Figure 6 for Figure 5 Enlarged view of point B in the middle.

[0019] Among them: 1. upper mold; 2. lower mold; 3. ultrasonic device; 4. adjustment plate; 11. fixing bolt; 12. gasket; 21. feed pipe; 22. first sealing gasket; 23. positioning groove; 24. inner cavity; 25. positioning hole; 26. threaded hole; 27. groove; 211. branch pipe; 212. main pipe; 241. pre-opening; 242. die lip; 243. feed port; 31. generator; 32. vibration rod; 33. guide column; 41. second sealing gasket; 42. bump; 43. slope. DETAILED DESCRIPTION

[0020] In order to make the purpose, technical solution and advantages of the utility model clearer, the technical solution of the utility model will be described clearly and completely below. Obviously, the described embodiments are only part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments of the utility model, all other embodiments obtained by ordinary technicians in this field without creative work belong to the scope of protection of the utility model.

[0021] The specific implementation of the utility model will be described below in conjunction with the accompanying drawings:

[0022] like Figures 1 to 6 As shown, a coating mold for producing a PVA film includes an upper mold 1, a lower mold 2, and a gasket 12. The upper mold 1 is provided with a plurality of fixing bolts 11, and the lower mold 2 is provided with threaded holes 26 that match the fixing bolts 11. The fixing bolts 11 pass through the upper mold 1 and are screwed into the threaded holes 26. The upper mold 1 is fixedly connected to the lower mold 2 through the fixing bolts 11. The same side of the upper mold 1 and the lower mold 2 cooperates to form a die lip 242. A gasket 12 is provided between the upper mold 1 and the lower mold 2. The gap between the die lip 242 in the assembled state of the upper mold 1 and the lower mold 2 can be changed by replacing the gasket 12 with different thicknesses.

[0023] The lower mold 2 is provided with an inner cavity 24, and the inner cavity 24 is a V-shaped structure. The V-shaped structure is used to gradually slow down the flow rate of the slurry entering the inner cavity 24, thereby making the slurry evenly distributed in the inner cavity 24. A feed port 243 is provided at the bottom of the inner cavity 24, and the feed port 243 is connected to the feed pipe 21. The feed pipe 21 includes a branch pipe 211 and a main pipe 212. The main pipe 212 is provided with a plurality of branch pipes 211, and the branch pipes 211 are connected to the feed port 243. The slurry enters the inner cavity 24 evenly through the plurality of branch pipes 211, so as to prevent the local pressure of the slurry from being too high when entering the inner cavity 24, resulting in inconsistent pressure of the slurry in different parts of the inner cavity 24.

[0024] Both ends of the lower mold 2 are provided with an ultrasonic device 3, which includes a vibrating rod 32 and a generator 31. The generator 31 is provided on the outer wall of the lower mold 2. The vibrating rod 32 is provided on the generator 31, and the vibrating rod 32 passes through the lower mold 2 and enters the inner cavity 24. The generator 31 transmits ultrasonic waves to the inner cavity 24 through the vibrating rod 32, so that the slurry vibrates and is more evenly distributed.

[0025] The two ends of the adjustment plate 4 are provided with protrusions 42, and the inner cavity 24 is provided with grooves 27 that match the protrusions 42. The adjustment plate 4 is detachably matched with the lower mold 2 through the cooperation between the protrusions 42 and the grooves 27. The side of the adjustment plate 4 provided with the protrusions 42 is provided with a second sealing gasket 41, and the side of the adjustment plate 4 away from the pre-through port 241 is provided with a detachable first sealing gasket 22, the first sealing gasket 22 is provided with a protrusion, and the inner cavity 24 is provided with a positioning groove 23 that matches the protrusion.

[0026] The first sealing gasket 22 and the second sealing gasket 41 can prevent the slurry from flowing out of the gap between the adjustment plate 4 and the side wall of the inner cavity 24. The adjustment plate 4 and the inner cavity 24 form a pre-opening 241, and a slope 43 is provided on one side of the adjustment plate 4 close to the pre-opening 241. The pre-opening 241 is connected to the die lip 242 and the inner cavity 24. The slurry in the inner cavity 24 contacts the slope 43, and under the action of the slope 43, the flow rate of the slurry flowing out of the die lip 242 is kept stable.

[0027] The working principle of the specific embodiment of the utility model is as follows: the slurry flows into the lower mold 2 through the feed pipe 21, and the V-shaped inner cavity 24 slows down the speed of the slurry. The ultrasonic devices 3 on both sides of the lower mold 2 vibrate and homogenize the slurry. After the slurry in the inner cavity 24 contacts the adjustment plate 4, it enters the die lip 242 through the pre-through port 241 on one side, and finally flows out of the mold from the die lip 242.

[0028] It should be noted that when an element is referred to as being "fixed to" another element, it may be directly on the other element or there may be an element centered thereon. When an element is considered to be "connected to" another element, it may be directly connected to the other element or there may be an element centered thereon. The terms "upper", "lower", "left", "right", "front", "rear" and similar expressions used herein are for illustrative purposes only.

[0029] The above description is only a preferred embodiment of the present invention and does not limit the present invention in any form. Although the present invention has been disclosed as a preferred embodiment as above, it is not used to limit the present invention. Any technical personnel in this field can make some changes or modify the technical contents disclosed above into equivalent embodiments without departing from the scope of the technical solution of the present invention. However, any brief modifications, equivalent changes and modifications made to the above embodiments based on the technical essence of the present invention without departing from the content of the technical solution of the present invention are still within the scope of the technical solution of the present invention.

Claims

1. A coating mold for producing a PVA film, comprising an upper mold (1), a lower mold (2) and a gasket (12), wherein the upper mold (1) is fixedly connected to the lower mold (2), the gasket (12) is arranged between the upper mold (1) and the lower mold (2), and the same side of the upper mold (1) and the lower mold (2) cooperate to form a mold lip (242), characterized in that: The lower die (2) is provided with an ultrasonic device (3), and a V-shaped inner cavity (24) is provided inside the lower die. A feed port (243) is provided at the bottom of the inner cavity (24), and the feed port (243) is connected to a feed pipe (21); a detachable adjustment plate (4) is provided inside the inner cavity (24), and the adjustment plate (4) and the inner cavity (24) form a pre-opening (241), and the pre-opening (241) is connected to the die lip (242) and the inner cavity (24).

2. The coating mold for producing a PVA film according to claim 1, characterized in that: The upper die (1) is provided with a plurality of fixing bolts (11), the lower die (2) is provided with threaded holes (26) matching the fixing bolts (11), and the fixing bolts (11) pass through the upper die (1) and are screwed into the threaded holes (26).

3. The coating mold for producing a PVA film according to claim 1, characterized in that: The feed pipeline (21) comprises a branch pipe (211) and a main pipe (212); the main pipe (212) is provided with a plurality of branch pipes (211); and the branch pipes (211) are in communication with the feed port (243).

4. The coating mold for producing a PVA film according to claim 1, characterized in that: The two ends of the adjustment plate (4) are provided with protrusions (42), and the inner cavity (24) is provided with grooves (27) matching the protrusions (42); and a second sealing gasket (41) is provided on one side of the adjustment plate (4) provided with the protrusions (42).

5. The coating mold for producing a PVA film according to claim 1, characterized in that: A detachable first sealing gasket (22) is provided on the side of the adjustment plate (4) away from the pre-opening (241); a protrusion is provided on the first sealing gasket (22), and a positioning groove (23) matching the protrusion is provided in the inner cavity (24).

6. The coating mold for producing a PVA film according to claim 1, characterized in that: A slope (43) is provided on one side of the adjustment plate (4) close to the pre-opening (241).

7. The coating mold for producing a PVA film according to claim 1, characterized in that: The ultrasonic device (3) is provided at both ends of the lower mold (2), and the ultrasonic device (3) comprises a vibration rod (32) and a generator (31). The generator (31) is provided on the outer wall of the lower mold (2), and a vibration rod (32) is provided on the generator (31). The vibration rod (32) passes through the lower mold (2) and enters into the inner cavity (24).

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