Installation and adjustment mechanism of casting nozzle for polyimide film production

Abstract

The present invention discloses a mounting and adjustment mechanism for a casting nozzle used in the production of polyimide film. The mechanism comprises a housing, a rotating drum for conveying a steel strip being rotatably connected thereto, and a casting nozzle disposed above the drum, capable of moving up and down relative to the drum under the action of an adjustment mechanism. The adjustment mechanism comprises a chute, a mounting adjustment block, and an adjustment bracket. The chute is disposed on two side walls of the housing. The mounting adjustment block is disposed corresponding to the chute and can slightly move up and down along the chute. The mounting adjustment block is also rotatably connected to a roller capable of abutting against the steel strip. The casting nozzle is disposed between the two mounting adjustment blocks and can move up and down along the mounting adjustment blocks. The adjustment bracket is fixed to the top ends of both sides of the casting nozzle and is threadedly connected to an adjustment screw. The lower end of the adjustment screw is rotatably connected to the mounting adjustment block. The casting nozzle is easy to install, the height of the casting nozzle is adjustable, and the spacing between the casting nozzle and the steel strip can be maintained, thereby ensuring film thickness consistency and reducing the longitudinal tolerance of the film.

Description

Technical Field

[0001] The invention relates to the technical field of polyimide film processing, in particular to a mounting and adjusting mechanism for a casting nozzle used in polyimide film production. Background Art

[0002] A tape casting machine is a specialized piece of equipment used to produce polyimide film. Using alumina as the primary raw material for ceramic tape casting, the pulverized material is mixed with a binder, plasticizer, dispersant, and solvent to create a slurry of a certain viscosity. The slurry then flows from the casting nozzle and is applied to a specialized steel belt by a scraper to a desired thickness. After drying and curing, the green film is peeled off from the belt. The scraper and casting nozzle are integrally integrated and are crucial components of the tape casting machine, crucial to the uniformity and thickness of the polyimide film.

[0003] However, in production, the casting nozzle of a conventional casting machine is fixed inside the casting machine via a bracket, located above the steel belt, which is rotated by a rotating drum. Due to the long-term contact between the steel belt and the rotating drum, the drum surface wears due to long-term use, resulting in inconsistent spacing between the casting nozzle and the steel belt, which can cause uneven film thickness. Furthermore, this fixing method cannot effectively adjust the distance between the casting nozzle and the steel belt, and thus the film thickness. Furthermore, due to the large weight of the bracket and the relatively narrow space inside the casting machine, installation is inconvenient. Summary of the Invention

[0004] In order to overcome the above shortcomings, the purpose of the present invention is to provide an installation and adjustment mechanism for a casting nozzle for polyimide film production, which is easy to install, the casting nozzle height is adjustable, and the spacing between the casting nozzle and the steel belt can be ensured, thereby ensuring the consistency of the film thickness and reducing the longitudinal tolerance of the film.

[0005] In order to achieve the above purpose, the technical solution adopted by the present invention is: an installation and adjustment mechanism for a casting nozzle for polyimide film production, comprising a box body, a drum for conveying a steel strip is rotatably connected to the box body, and a casting nozzle is arranged above the drum, which can move up and down relative to the drum under the action of the adjustment mechanism, and is characterized in that: the adjustment mechanism includes a slide groove, an installation adjustment block and an adjustment bracket, the slide groove is arranged on two side walls of the box body, the installation adjustment block is arranged corresponding to the slide groove and can move slightly up and down along the slide groove, and the installation adjustment block is also rotatably connected to a roller that can abut against the steel strip; the casting nozzle is arranged between the two installation adjustment blocks and can move up and down along the installation adjustment block, the adjustment bracket is fixed to the top ends of both sides of the casting nozzle and is threadedly connected with an adjusting screw, and the lower end of the adjusting screw is rotatably connected to the installation adjustment block.

[0006] The beneficial effects of the present invention are as follows: on the one hand, the adjustment bracket is fixed on the casting nozzle, and the adjustment bracket is threadedly connected to the adjustment screw rotatably connected to the mounting adjustment block, so that the casting nozzle can move up and down along the mounting adjustment block, so that the distance between the casting nozzle and the steel belt can be adjusted by rotating the adjustment screw, thereby adjusting the thickness of the film;

[0007] On the other hand, the roller can be against the steel belt, and the installed adjustment block can move slightly up and down along the slide groove. The roller rotates with the drum on the steel belt plane. When the drum surface is worn, there is a small adjustment distance between the roller and the steel belt, which can ensure the distance between the casting nozzle and the steel belt to the greatest extent, thereby ensuring the consistency of the film thickness and reducing the longitudinal tolerance of the film.

[0008] Specifically, the chute is arranged along the direction of conveyance of the steel strip, and a slider capable of sliding along the chute is provided on the side of the mounting and adjustment block away from the casting nozzle. The width of the chute is greater than the height of the slider. The mounting and adjustment block slides into the opening at the end of the chute, facilitating installation of the mounting block and enabling fine-tuning of the chute up and down.

[0009] Furthermore, the side of the adjustment block near the slider is equipped with a stopper block parallel to the chute. This stopper block is threadedly connected to an abutment screw that is perpendicular to and abuts the chute. The abutment screw abuts the chute, but does not completely lock against it. This prevents the adjustment block from shifting and allows for slight adjustment of the rollers when the drum surface wears.

[0010] Furthermore, a slideway is vertically disposed on one side of the mounting adjustment block near the casting nozzle, and the end of the casting nozzle is embedded in the slideway and can slide up and down along the slideway. The casting nozzle slides up and down along the slideway to facilitate adjusting the distance between the casting nozzle and the rotating drum, thereby adjusting the film thickness.

[0011] Furthermore, the installation and adjustment block is provided with a groove upwardly along its lower end surface, the roller is embedded in the groove and rotatably connected to the groove, and the lower end surface of the roller extends out of the lower end surface of the installation and adjustment block and can abut against the steel belt.

[0012] Furthermore, the adjustment bracket is fixed to the casting nozzle by bolts, which is convenient for disassembly and fixation.

[0013] Furthermore, the casting nozzle includes a casting nozzle body, a casting scraper and a feed pipe fixedly connected by bolts, one end of the feed pipe is connected to the casting nozzle body, and the other end extends out of the box body and is connected to the supply box. BRIEF DESCRIPTION OF THE DRAWINGS

[0014] Figure 1 A schematic structural diagram of an embodiment of the present invention and a partially enlarged diagram thereof;

[0015] Figure 2 Schematic diagram of the connection structure of the installation adjustment block, the adjustment bracket and the casting nozzle in an embodiment of the present invention;

[0016] Figure 3 It is a side view of an embodiment of the present invention.

[0017] In the picture:

[0018] 1. Box body; 2. Steel belt; 3. Rotating drum; 4. Casting nozzle; 5. Chute; 6. Mounting adjustment block; 61. Slider; 62. Limit block; 63. Slide; 64. Groove; 7. Adjustment bracket; 8. Roller; 9. Adjustment screw; 10. Resistance screw. DETAILED DESCRIPTION

[0019] The preferred embodiments of the present invention are described in detail below with reference to the accompanying drawings so that the advantages and features of the present invention can be more easily understood by those skilled in the art, thereby making a clearer and more precise definition of the protection scope of the present invention.

[0020] Example

[0021] See attached Figure 1-3 As shown, the installation and adjustment mechanism of the casting nozzle 4 for the production of polyimide film includes a housing 1, and the housing 1 is rotatably connected to a drum 3 for conveying a steel belt 2. The drum 3 rotates under the action of a driving member. The drum 3 is prior art and will not be described here in detail. A casting nozzle 4 is provided above the drum 3, which can move up and down relative to the drum 3 under the action of an adjustment mechanism. The casting nozzle 4 includes a casting nozzle 4 main body, a casting scraper and a feed pipe fixedly connected by bolts. One end of the feed pipe is connected to the casting nozzle 4 main body, and the other end extends out of the housing 1 and is connected to the feed box. The raw material in the feed box enters the casting nozzle 4 main body from the feed pipe, is sprayed onto the steel belt 2 located below through the casting nozzle 4 main body, and then the raw material is flattened by the casting scraper.

[0022] The adjustment mechanism includes a chute 5, an adjustment block 6, and an adjustment bracket 7. The chute 5 is located on both side walls of the housing 1. The adjustment block 6 is positioned in correspondence with the chute 5 and can be finely moved up and down along the chute 5. The adjustment block 6 is also rotatably connected to a roller 8 that abuts against the steel strip 2. The chute 5 is a C-shaped slot located along the conveying direction of the steel strip 2. A slider 61 is located on the side of the adjustment block 6 facing away from the casting nozzle 4, which can slide along the chute 5. The width of the chute 5 is greater than the height of the slider 61. The adjustment block 6 slides into the opening at the end of the chute 5, facilitating installation and enabling fine adjustment up and down within the chute 5.

[0023] The mounting and adjusting block 6 has an upwardly defined groove 64 along its lower end surface. The roller 8 is embedded in the groove 64 and is rotatably connected thereto. The lower end surface of the roller 8 extends beyond the lower end surface of the mounting and adjusting block 6 and can abut against the steel belt 2. The adjusting bracket 7 is fixed to the casting nozzle 4 by bolts, making it easy to remove and fix.

[0024] A stopper 62, parallel to the chute 5, is also provided on the side of the mounting adjustment block 6 near the slider 61. This stopper 62 is threadedly connected to a contact screw 10, which is perpendicular to and abuts against the chute 5. The chute 5 is provided with a notch corresponding to the contact screw 10, facilitating manual rotation of the contact screw 10 to adjust its position up and down. The contact screw 10 contacts the chute 5, but does not completely lock, preventing displacement of the mounting adjustment block 6. It also allows for slight adjustment of the roller 8 in the event of wear on the surface of the drum 3.

[0025] The adjusting bracket 7 is fixed on the casting nozzle 4, and the adjusting bracket 7 is threadedly connected to the adjusting screw 9 which is rotatably connected to the mounting adjusting block 6. The casting nozzle 4 can move up and down along the mounting adjusting block 6 to adjust the distance between the casting nozzle 4 and the steel belt 2 by rotating the adjusting screw 9, thereby adjusting the film thickness.

[0026] The casting nozzle 4 is arranged between two mounting adjustment blocks 6 and can move up and down along the mounting adjustment blocks 6. The adjustment bracket 7 is fixed to the top of both sides of the casting nozzle 4 and is threadedly connected with an adjustment screw 9. The lower end of the adjustment screw 9 is rotatably connected to the mounting adjustment block 6.

[0027] A slideway 63 is vertically provided on one side of the mounting adjustment block 6 near the casting nozzle 4. The end of the casting nozzle 4 is embedded in the slideway 63 and can slide up and down along the slideway 63. The casting nozzle 4 slides up and down along the slideway 63 to facilitate adjusting the distance between the casting nozzle 4 and the drum 3 to adjust the film thickness.

[0028] The roller 8 can abut against the steel belt 2, and the installation adjustment block 6 can move slightly up and down along the slide 5. The roller 8 rotates with the drum 3 on the plane of the steel belt 2. When the surface of the drum 3 is worn, there is a small adjustment distance between the roller 8 and the steel belt 2, which can ensure the distance between the casting nozzle 4 and the steel belt 2 to the greatest extent, thereby ensuring the consistency of the film thickness and reducing the longitudinal tolerance of the film.

[0029] The above embodiments are only for illustrating the technical concept and features of the present invention. Its purpose is to enable people familiar with this technology to understand the content of the present invention and implement it. It cannot be used to limit the scope of protection of the present invention. Any equivalent changes or modifications made according to the spirit of the present invention should be included in the scope of protection of the present invention.

Claims

1. A mounting and adjusting mechanism for a casting nozzle for producing polyimide film, comprising a housing, a drum for conveying a steel strip being rotatably connected to the housing, and a casting nozzle disposed above the drum capable of moving up and down relative to the drum under the action of an adjusting mechanism, characterized in that: The adjusting mechanism includes a slide groove, an installation adjustment block and an adjusting bracket, the slide groove is arranged on the two side walls of the box body, the installation adjustment block is arranged corresponding to the slide groove and can be slightly moved up and down along the slide groove, and the installation adjustment block is also rotatably connected to a roller that can abut against the steel belt; the casting nozzle is arranged between the two installation adjustment blocks and can move up and down along the installation adjustment blocks, the adjusting bracket is fixed to the top ends of both sides of the casting nozzle and is threadedly connected with an adjusting screw, and the lower end of the adjusting screw is rotatably connected to the installation adjustment block; The chute is arranged along the transmission direction of the steel belt, and a slider capable of sliding along the chute is arranged on the side of the installation adjustment block away from the casting nozzle, and the width of the chute is greater than the height of the slider; A limit block is provided on one side of the mounting adjustment block close to the slider and is arranged parallel to the slide groove. The limit block is threadedly connected to a contact screw, which is perpendicular to the slide groove and can abut against the slide groove. A slideway is vertically arranged on one side of the installation and adjustment block close to the casting nozzle, and the end of the casting nozzle is embedded in the slideway and can slide up and down along the slideway.

2. The installation and adjustment mechanism for a casting nozzle for producing a polyimide film according to claim 1, wherein: The installation and adjustment block is provided with a groove upwardly along its lower end surface, the roller is embedded in the groove and rotatably connected to the groove, and the lower end surface of the roller extends out of the lower end surface of the installation and adjustment block and can abut against the steel belt.

3. The installation and adjustment mechanism for a casting nozzle for producing a polyimide film according to claim 1, wherein: The adjusting bracket is fixed to the casting nozzle through bolts.

4. The installation and adjustment mechanism for a casting nozzle for producing a polyimide film according to claim 1, wherein: The casting nozzle comprises a casting nozzle body, a casting scraper and a feed pipe which are fixedly connected by bolts. One end of the feed pipe is connected to the casting nozzle body, and the other end extends out of the box body and is connected to the feed box.

Images