A slot die film formation mechanism

Abstract

This utility model relates to a slit-type film-forming mechanism, including a rotatably arranged coating roller. The mechanism is characterized by: an extrusion die with an inclined arrangement on one side of the coating roller; an extrusion head at the lower end of the extrusion die; a discharge slit at the extrusion head; a material cavity communicating with the basic slit within the extrusion die; an injection hole at the higher end of the extrusion die communicating with the material cavity; a coating gap formed between the discharge slit and the coating roller; and an adjustment mechanism for driving the extrusion die to move toward or away from the coating roller, facilitating adjustment of the gap between the doctor blade roller and the coating roller.

Description

Technical Field

[0001] This utility model relates to the field of direct film forming equipment, specifically to a slit-type film forming mechanism. Background Technology

[0002] Existing film-forming machines, such as the quick-dissolving film-forming machine described in the applicant's earlier patent application (CN202220040649.6), use a scraper-type film-forming method. The raw materials used for film-forming are usually placed in an open material tank, and the raw materials are in direct contact with the air. However, for some solvents that evaporate quickly or raw materials that require isolation from air for film-forming, if the above film-forming method is used, the composition of the raw materials may change, resulting in the inability to form a film. Summary of the Invention

[0003] The technical problem to be solved by this utility model is to address the shortcomings of the existing technology. A slit-type film-forming mechanism is provided to seal the material chamber, prevent the raw material from volatilizing or reacting with air, and maintain the composition of the raw material.

[0004] To achieve the above objectives, the present invention provides the following technical solution: a slit-type film-forming mechanism, comprising a rotatably arranged coating roller, characterized in that: one side of the coating roller is provided with an extrusion die including an inclined arrangement, the lower end of the extrusion die is provided with an extrusion head, the extrusion head is provided with a discharge slit, the extrusion die is provided with a material cavity communicating with the basic slit, the higher end of the extrusion die is provided with an injection hole communicating with the material cavity, and the discharge slit and the coating roller form a coating gap.

[0005] The present invention with the above features: the raw material is added into the material cavity of the extrusion die through the injection hole until the material cavity is filled with the raw material, the main material hole continuously injects the raw material, and the newly added raw material squeezes out the raw material originally placed in the material cavity through the discharge slit. The closed material cavity effectively isolates the air and prevents the raw material from volatilizing.

[0006] A further feature of this invention is that the extrusion die is provided with an adjustment mechanism that drives it to move toward or away from the coating roller.

[0007] The present invention, which has the above-mentioned features, facilitates the adjustment of the gap between the coating roller and the discharge slit.

[0008] A further feature of this invention is that the adjusting mechanism includes a base for connecting to the frame of a film-making machine, the base being slidably engaged with an extrusion die, and the base being provided with a driving device for driving the extrusion die toward or away from the coating roller.

[0009] A further feature of this invention is that: the bottom of the extrusion die is provided with a slide block, the slide block is provided with a slider, the base is provided with a slide rail that slides with the slider, the slide rail is positioned toward the coating roller, the driving device includes a drive motor, the output end of the drive motor is linked with a screw, the screw is linked with a screw seat, and the screw seat is fixedly connected to the slide block.

[0010] A further feature of this invention is that the base is provided with a distance measuring plate, and the slide is provided with a distance sensor corresponding to the distance measuring plate.

[0011] The present invention with the above features: the raw material enters the material chamber through the injection hole, and is extruded from the discharge slit to the bottom layer through the coating gap by gravity. The driving device drives the extrusion die to adjust the gap between the discharge slit and the coating roller, thereby controlling the coating thickness. The distance sensor and the distance measuring plate work together to measure the distance and accurately control the size of the coating gap.

[0012] The beneficial effects of this invention are: it seals the material chamber, preventing the raw materials from evaporating or reacting with air, thus preserving the composition of the raw materials.

[0013] The present invention will now be described in further detail with reference to the accompanying drawings and embodiments. Attached Figure Description

[0014] Figure 1 This is a three-dimensional schematic diagram of an embodiment of the present utility model. Figure 1 .

[0015] Figure 2 This is a three-dimensional schematic diagram of an embodiment of the present utility model. Figure 2 . Detailed Implementation

[0016] like Figure 1 —— Figure 2The slit-type film-forming mechanism shown includes a rotatable coating roller 1. An extrusion die 2, including an inclined arrangement, is provided on one side of the coating roller 1. An extrusion head 201 is located at the lower end of the extrusion die 2, and a discharge slit is provided at the top of the extrusion head 201. A material cavity communicating with the basic slit is provided inside the extrusion die 2. An injection hole 202 is provided at the higher end of the extrusion die 2 communicating with the material cavity. A coating gap is formed between the discharge slit and the coating roller 1. The extrusion die 2 is provided with an adjustment mechanism for driving its displacement toward or away from the coating roller 1. The adjustment mechanism includes a base 3 for connecting to the frame of the film-forming machine. The extrusion die 2 is slidably engaged. The base 3 is provided with a driving device that drives the extrusion die 2 to move toward or away from the coating roller 1. The bottom of the extrusion die 2 is provided with a slide block 4. The slide block 4 is provided with a slider 5. The base 3 is provided with a slide rail 6 that slidably engages with the slider. The slide rail 6 is positioned toward the coating roller 1. The driving device includes a drive motor 7. The drive motor 7 is fixedly connected to the frame of the film forming machine. The output end of the drive motor 7 is linked to a screw. The screw is linked to a screw seat 8. The screw seat 8 is fixedly connected to the slide block 4. The base 3 is provided with a distance measuring plate 9. The slide block 4 is provided with a distance sensor 10 corresponding to the distance measuring plate 9.

Claims

1. A slit-type film-forming mechanism, comprising a rotatably arranged coating roller, characterized in that: The coating roller is provided with an inclined extrusion die on one side. The lower end of the extrusion die is provided with an extrusion head. The extrusion head is provided with a discharge slit. The extrusion die is provided with a material cavity that communicates with the basic slit. The higher end of the extrusion die is provided with an injection hole that communicates with the material cavity. The discharge slit and the coating roller form a coating gap.

2. The slit-type film-forming mechanism according to claim 1, characterized in that: The extrusion die is provided with an adjustment mechanism that drives it to move toward or away from the coating roller.

3. The slit-type film-forming mechanism according to claim 2, characterized in that: The adjustment mechanism includes a base for connecting to the frame of the film forming machine. The base is slidably engaged with the extrusion die. The base is provided with a drive device to drive the extrusion die toward or away from the coating roller.

4. A slit-type film-forming mechanism according to claim 3, characterized in that: The bottom of the extrusion die is provided with a slide block, the slide block is provided with a slider, the base is provided with a slide rail that slides with the slider, the slide rail is positioned towards the coating roller, the driving device includes a drive motor, the output end of the drive motor is linked with a screw, the screw is linked with a screw seat, and the screw seat is fixedly connected to the slide block.

5. A slit-type film-forming mechanism according to claim 4, characterized in that: The base is equipped with a distance measuring plate, and the slide is equipped with a distance sensor corresponding to the distance measuring plate.

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