CN215997313U

CN215997313U - Wide-width coating die head

Info

Publication number: CN215997313U
Application number: CN202121738171.6U
Authority: CN
Inventors: 陈贵山; 李宁; 刘宗辉; 彭建林
Original assignee: Shenzhen Manst Technology Co Ltd
Current assignee: Shenzhen Manst Technology Co Ltd
Priority date: 2021-07-28
Filing date: 2021-07-28
Publication date: 2022-03-11
Anticipated expiration: 2031-07-28

Abstract

The utility model discloses a wide-width coating die head which comprises an upper die head and a lower die head, wherein a gasket is arranged between the upper die head and the lower die head, a coating slit is formed between the upper die head and the lower die head through the gasket, and a lip is formed on one side of the coating die head by the upper die head and the lower die head; the lower die head is provided with a feeding channel and a main pressure equalizing cavity communicated with the feeding channel, and the lower die head is also provided with a secondary pressure equalizing cavity. Through set up on the die head down feed channel and with the communicating main pressure-equalizing chamber of feed channel, and be located main pressure-equalizing chamber with between the lip and with the communicating inferior pressure-equalizing chamber of coating slit for thick liquids reentrant main pressure-equalizing chamber after through feed channel, rethread inferior pressure-equalizing chamber after the pressure-equalizing in main pressure-equalizing chamber, through twice after the pressure-equalizing again coating slit to the lip, have the advantage of the homogeneity of the coating density of assurance coating surface.

Description

Wide-width coating die head

Technical Field

The utility model relates to the technical field of coating die heads, in particular to a wide-width coating die head.

Background

The existing extrusion coating technology is widely applied in the coating field, in order to improve the production efficiency, a high-speed and wide-width coating die head is increasingly widely used, and the uniformity of the coating density on the coating surface is poor due to the fact that the cavity of the wide-width die head is long, and the fluid pressure difference between the middle of the cavity and the two ends of the cavity is relatively large.

Disclosure of Invention

Therefore, the technical problem to be solved by the utility model is to overcome the defect of poor uniformity of coating density on the coating surface in the prior art, thereby providing a wide-width coating die.

In order to solve the technical problems, the technical scheme of the utility model is as follows:

a wide-width coating die head comprises an upper die head and a lower die head which are matched with each other, wherein a gasket is arranged between the upper die head and the lower die head, a coating slit is formed between the upper die head and the lower die head through the gasket, and a lip for enabling slurry to flow out of the coating slit is formed on one side of the coating die head by the upper die head and the lower die head; the lower die head is provided with a feeding channel and a main pressure equalizing cavity communicated with the feeding channel, and the lower die head is also provided with at least one secondary pressure equalizing cavity which is positioned between the main pressure equalizing cavity and the lip and communicated with the coating slit.

Further, still be equipped with adjustment mechanism on the last die head, adjustment mechanism includes actuating lever and driving piece, the actuating lever runs through go up the die head, the actuating lever upper end is connected the driving piece, T type head is connected to the lower extreme, the driving piece drive the actuating lever is in do reciprocating motion in the mounting through-hole in order to adjust T type head with the height of the slit between the die head down.

Further, a plurality of the driving parts are arranged at intervals along the length direction of the upper die head, and a plurality of the T-shaped heads are arranged side by side and continuously along the length direction of the upper die head.

Further, the T-shaped head at the lower end of the driving rod is arranged on the upper die head at a mounting position between the secondary pressure equalizing cavity and the lip.

Furthermore, the mounting through hole is a T-shaped mounting hole, the adjusting mechanism is fixed to the upper die head through the mounting through hole, the driving piece is fixed to the upper end of the mounting through hole through a counter bore, and the lower end of the mounting through hole is provided with a step groove for containing the T-shaped head.

Further, the feed inlet of the feed channel is positioned on the back side or the lower side of the lower die head.

Further, the extending direction of the feed channel is parallel to the length direction of the coating slit.

Further, the driving member is any one of a differential head, a motor or a cylinder.

The technical scheme of the utility model has the following advantages:

1. according to the wide-width coating die head provided by the utility model, the lower die head is provided with the main pressure equalizing cavity communicated with the feeding channel, the at least one secondary pressure equalizing cavity is arranged between the main pressure equalizing cavity and the lip, the secondary pressure equalizing cavity is communicated with the coating slit, slurry enters the main pressure equalizing cavity through the feeding channel and is equalized, the slurry equalized by the main pressure equalizing cavity is equalized by the secondary pressure equalizing cavity, and the slurry is coated from the coating slit to the lip after being equalized twice, so that the wide-width coating die head has the advantage of ensuring the uniformity of the coating density on the coating surface.

2. According to the wide-width coating die head provided by the utility model, the volume of the secondary pressure equalizing cavity on the lower die head is smaller than that of the primary pressure equalizing cavity, slurry can be slowly flowed when passing through the primary pressure equalizing cavity, and can be further slowly flowed when flowing to the secondary pressure equalizing cavity, so that the problem that the coating density uniformity is influenced because the slurry is unevenly flowed to the lip mouth can be avoided due to the small volume.

3. According to the wide-width coating die head provided by the utility model, the upper die head is provided with the adjusting mechanism, the driving rod of the adjusting mechanism is connected with the gasket, and the driving rod is driven to do reciprocating motion in the mounting through hole so as to adjust the height of the coating slit through which slurry passes, thereby adjusting the coating thickness.

Drawings

In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings used in the description of the embodiments or the prior art will be briefly described below, and it is obvious that the drawings in the following description are some embodiments of the present invention, and other drawings can be obtained by those skilled in the art without creative efforts.

FIG. 1 is a rear view of a broad width coating die provided by the present invention;

FIG. 2 is a top view of a broad width coating die provided by the present invention;

fig. 3 is a cross-sectional view of a broad width coating die provided by the present invention.

Description of reference numerals: 1. an upper die head; 101. a step groove; 2. a gasket; 3. a lower die head; 301. a feed channel; 302. a primary pressure-equalizing chamber; 303. a secondary pressure-equalizing chamber; 4. an adjustment mechanism; 401. a drive rod; 402. a T-shaped head; 403. a drive member; 5. bolt holes; 6. a lip; 7. coating the slit.

Detailed Description

The technical solutions of the present invention will be described clearly and completely with reference to the accompanying drawings, and it should be understood that the described embodiments are some, but not all embodiments of the present invention. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.

In the description of the present invention, it should be noted that the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer", etc., indicate orientations or positional relationships based on the orientations or positional relationships shown in the drawings, and are only for convenience of description and simplicity of description, but do not indicate or imply that the device or element being referred to must have a particular orientation, be constructed and operated in a particular orientation, and thus, should not be construed as limiting the present invention.

In the description of the present invention, it should be noted that, unless otherwise explicitly specified or limited, the terms "mounted," "connected," and "connected" are to be construed broadly, e.g., as meaning either a fixed connection, a removable connection, or an integral connection; can be mechanically or electrically connected; they may be connected directly or indirectly through intervening media, or they may be interconnected between two elements. The specific meanings of the above terms in the present invention can be understood in specific cases to those skilled in the art.

In addition, the technical features involved in the different embodiments of the present invention described below may be combined with each other as long as they do not conflict with each other.

The wide-width coating die head shown in fig. 1-3 comprises an upper die head 1 and a lower die head 3 which are matched with each other, a gasket 2 is arranged between the upper die head 1 and the lower die head 3, a coating slit 7 is formed between the upper die head 1 and the lower die head 3 through the gasket 2, and a lip 6 for allowing slurry to flow out of the coating slit 7 is formed on one side of the coating die head by the upper die head 1 and the lower die head 3. The lower die head 3 is provided with a feeding channel 301 and a main pressure equalizing cavity 302 communicated with the feeding channel 301, and the lower die head 3 is also provided with at least one secondary pressure equalizing cavity 303 which is positioned between the main pressure equalizing cavity 302 and the lip 6 and communicated with the coating slit 7.

This kind of broad width coating die head, through set up on die head 3 down with the communicating main pressure-equalizing chamber 302 of feedstock channel 301, set up inferior pressure-equalizing chamber 303 between main pressure-equalizing chamber 302 and lip 6, and inferior pressure-equalizing chamber 303 communicates with each other with coating slit 7, thick liquids can be by the pressure-equalizing after entering main pressure-equalizing chamber 302 through feedstock channel 301, thick liquids after main pressure-equalizing chamber 302 pressure-equalizing are again through inferior pressure-equalizing chamber 303 pressure-equalizing, coat through coating slit 7 to lip 6 again after twice pressure-equalizing, the advantage of the homogeneity of the coating density on assurance coating surface has.

In this embodiment, the upper die 1 is provided with a plurality of upper bolt holes 5 arranged along the length direction of the upper die 1, the lower die 3 is provided with lower bolt holes 5 corresponding to the positions of the upper bolt holes 5 on the upper die 1, and the upper die 1 and the lower die 3 are fixedly connected by bolts passing through the upper bolt holes 5 and the lower bolt holes 5.

In this embodiment, an installation through hole is formed in the upper die head 1, an adjusting mechanism 4 is further arranged on the upper die head 1, the adjusting mechanism 4 includes a driving member 403 and a driving rod 401, the driving member 403 is fixed at the top of the upper die head 1, the driving rod 401 is connected to the driving member 403 and extends into the installation through hole, and one end of the driving rod 401, which faces the coating slit 7, is connected with a T-shaped head 402; the driving member 403 drives the driving rod 401 to reciprocate in the mounting through hole to adjust the height of the slit between the T-head 402 and the lower die 3. The driving member 403 drives the T-shaped head 402 to move up and down in the coating slit 7 through the driving rod 401, so that the height of the coating slit 7 can be adjusted. Specifically, the driving member 403 is any one of a differential head, a motor, and a cylinder.

In the present embodiment, the adjusting mechanism 4 is provided in plurality and is arranged at regular intervals along the length direction of the upper die 1, and the plurality of T-shaped heads 402 are arranged side by side and continuously along the length direction of the upper die 1. The arrangement of the plurality of T-shaped heads 402 in parallel and in series can maintain the uniformity of the height of the coating slot 7 at each position in the longitudinal direction of the upper die 1.

In this embodiment, the secondary pressure equalizing chamber 303 is mounted on the lower die head 3 at a position between the primary pressure equalizing chamber 302 and the drive bar 401; specifically, leave the clearance between inferior voltage-sharing chamber 303 and the main voltage-sharing chamber 302, leave the clearance between actuating lever 401 and the main voltage-sharing chamber 302, avoided the uneven flow of thick liquids to lip 6, be favorable to guaranteeing the homogeneity of die head when the coating.

In this embodiment, the mounting through hole is specifically a T-shaped mounting hole, and a stepped groove 101 facing the gasket 2 is formed at the lower end of the upper die 1 corresponding to the T-shaped mounting hole. The stepped slot 101 accommodates a T-head 402, and the T-head 402 has an outer diameter larger than that of the main body portion of the drive rod 401, so that the T-head 402 is restricted to a portion of the T-fitting hole having a large diameter. The driving rod 401 can be limited through the stepped groove 101, and the driving rod 401 is prevented from being separated from the upper die head 1 when moving up and down, so that the using effect of the coating die head is prevented from being influenced.

In the present embodiment, the feed opening of the feed channel 301 is located on the side of the lower die 3 facing away from the lip 6, and the extending direction of the feed channel 301 is parallel to the length direction of the coating slit 7. In the coating process, thick liquids get into from feed channel 301's feed inlet, get into main pressure-equalizing chamber 302 pressure-equalizing behind feed channel 301, pass through secondary pressure-equalizing chamber 303 pressure-equalizing behind main pressure-equalizing chamber 302 pressure-equalizing, then flow to coating slit 7, flow out to lip 6 at last and coat.

In summary, according to the wide-width coating die head provided by the utility model, the lower die head 3 is provided with the main pressure equalizing cavity 302 communicated with the feeding channel 301, the at least one secondary pressure equalizing cavity 303 is arranged between the main pressure equalizing cavity 302 and the lip 6, the secondary pressure equalizing cavity 303 is communicated with the coating slit 7, slurry enters the main pressure equalizing cavity 302 through the feeding channel 301 and is equalized in pressure, the slurry equalized in pressure by the main pressure equalizing cavity 302 is equalized by the secondary pressure equalizing cavity 303, and the slurry is coated on the lip 6 through the coating slit 7 after being equalized for two times, so that the wide-width coating die head has the advantage of ensuring the uniformity of the coating density on the coating surface.

It should be understood that the above examples are only for clarity of illustration and are not intended to limit the embodiments. Other variations and modifications will be apparent to persons skilled in the art in light of the above description. And are neither required nor exhaustive of all embodiments. And obvious variations or modifications therefrom are within the scope of the utility model.

Claims

1. The wide-width coating die head is characterized by comprising an upper die head (1) and a lower die head (3) which are matched with each other, wherein a gasket (2) is arranged between the upper die head (1) and the lower die head (3), a coating slit (7) is formed between the upper die head (1) and the lower die head (3) through the gasket (2), and a lip (6) for slurry to flow out of the coating slit (7) is formed on one side of the coating die head by the upper die head (1) and the lower die head (3);

the lower die head (3) is provided with a feeding channel (301) and a main pressure equalizing cavity (302) communicated with the feeding channel (301), and the lower die head (3) is further provided with at least one secondary pressure equalizing cavity (303) which is positioned between the main pressure equalizing cavity (302) and the lip opening (6) and communicated with the coating slit (7).

2. The broad width coating die head according to claim 1, wherein the upper die head (1) is further provided with an adjusting mechanism (4), the adjusting mechanism (4) comprises a driving rod (401) and a driving member (403), the driving rod (401) penetrates through the upper die head (1), the driving rod (401) is connected with the driving member (403) at the upper end, the driving member (403) is connected with the T-shaped head (402) at the lower end, and the driving member (403) drives the driving rod (401) to reciprocate in the mounting through hole so as to adjust the height of the slit between the T-shaped head (402) and the lower die head (3).

3. The broad width coating die of claim 2, wherein the adjusting mechanism (4) is plural, the driving members (403) are arranged at regular intervals along the length direction of the upper die (1), and the T-shaped heads (402) are arranged side by side and continuously along the length direction of the upper die (1).

4. The broad width coating die of claim 2, wherein a T-head (402) at the lower end of the driving rod (401) is disposed at a mounting position on the upper die (1) between the secondary pressure equalizing chamber (303) and the lip (6).

5. The broad width coating die head of claim 2, wherein the adjusting mechanism (4) is fixed on the upper die head (1) through a mounting through hole, the driving member (403) is fixed at the upper end of the mounting through hole through a counter bore, and the stepped groove (101) for accommodating the T-shaped head (402) is arranged at the lower end of the mounting through hole.

6. The broad width coating die of claim 1, wherein the feed inlet of the feed channel (301) is located at the back side or lower side of the lower die (3).

7. The broad width coating die of claim 1, wherein the feed channel (301) extends in a direction parallel to the length direction of the coating slot (7).

8. The broad width coating die of claim 2, wherein the drive (403) is any one of a differential head, a motor, or a cylinder.