CN114887829B

CN114887829B - Coating gasket and coating die head

Info

Publication number: CN114887829B
Application number: CN202210328276.7A
Authority: CN
Inventors: 张琳; 刘宗辉; 王精华
Original assignee: Shenzhen Manst Technology Co Ltd
Current assignee: Shenzhen Manst Technology Co Ltd
Priority date: 2022-03-29
Filing date: 2022-03-29
Publication date: 2023-06-30
Anticipated expiration: 2042-03-29
Also published as: CN114887829A

Abstract

The invention discloses a coating gasket and a coating die head, wherein the coating gasket comprises a gasket body and a sub-gasket; the gasket body is provided with a mounting port; the sub-gasket is detachably arranged in the mounting opening and is provided with a colloid flow passage communicated with the dispensing hole of the upper die head and a colloid outlet communicated with the colloid flow passage. The invention improves the structure of the coating gasket, improves the adaptability of the coating gasket, can be applied to different coating and dispensing processes, reduces the waste of the gasket, reduces the processing amount and shortens the processing period.

Description

Coating gasket and coating die head

Technical Field

The invention relates to the technical field of coating dies, in particular to a coating gasket and a coating die.

Background

In the prior art, slit extrusion coating is a precise wet coating technology, and the working principle is that slurry is extruded and sprayed out along the slit of a coating die head under a certain pressure and a certain flow rate to be transferred onto a substrate. Compared with other coating modes, the coating method has the advantages of high coating speed, high precision and uniform wet thickness; the coating system is closed, can prevent pollutant entering in the coating process, the slurry utilization rate is high, the slurry property can be kept stable, and the coating system can adapt to different slurry viscosities and solid content ranges.

The coating die head consists of an upper die head, a lower die head and a gasket clamped in the upper die head, a cavity is formed in the lower die head, slurry enters the cavity from a feed inlet, a slurry outlet for the slurry to flow out is formed in the front end of the gasket, the upper die head, the lower die head and the gasket are surrounded to form a coating slit, the slurry is extruded from a lip through the coating slit to coat the slurry on a base material on a coating roller, and a functional layer is formed on the base material, such as coating negative slurry on a copper foil to form a battery negative plate; and coating positive electrode slurry on the aluminum foil to form a battery positive electrode plate.

According to the technological requirement, the edge of the coating slurry on the substrate is required to be subjected to glue dispensing operation, most of the existing coating gaskets are metal sheets, the gasket is subjected to slot milling operation, slots are milled through or milled into to form a colloid flow channel, the gasket is integrally formed and clamped between an upper die head and a lower die head, a glue dispensing channel is arranged on the upper die head, one end of the glue dispensing channel is connected with a glue supply system, the other end of the glue dispensing channel is communicated with the colloid flow channel on the gasket, and insulating glue is coated on the substrate on two sides of the slurry while the slurry is coated on the substrate.

However, in the prior art, one gasket is only suitable for one process requirement of coating and dispensing, and different gaskets need to be manufactured by different coating processes, so that the gasket is wasted and a longer processing period is caused.

Disclosure of Invention

The invention mainly aims to provide a coating gasket and a coating die head, which aim to improve the suitability of the coating gasket so as to reduce waste and shorten the processing period.

To achieve the above object, the present invention provides a coated gasket, comprising:

the gasket body is provided with a mounting port; and

the sub-gasket is detachably arranged in the mounting opening and is provided with a colloid flow passage communicated with the dispensing hole of the upper die head and a colloid outlet communicated with the colloid flow passage.

Optionally, the sub-gasket is provided with a through hole, the feeding end of the colloid flow channel is communicated with the through hole, and the through hole is used for being communicated with the dispensing hole of the upper die head.

Optionally, the gel runner comprises a first dispensing runner section, a second dispensing runner section and a third dispensing runner section which are sequentially communicated from a feeding end to a discharging end;

the sub-gasket is provided with a front surface and a back surface which are opposite, the first dispensing runner section and the third dispensing runner section are arranged on the front surface of the sub-gasket, the second dispensing runner section is arranged on the back surface of the sub-gasket, and the connection parts of the second dispensing runner section and the first dispensing runner section and the connection parts of the second dispensing runner section and the third dispensing runner section are provided with communication hole flanging.

Optionally, a receiving groove is formed in the front surface of the sub-gasket corresponding to the second dispensing runner section, so as to be used for receiving the adjusting block of the upper die head.

Optionally, the gel flow channel further comprises a buffer section, wherein a feeding end of the buffer section is communicated with the third dispensing flow channel section, and a discharging end of the buffer section forms the gel outlet.

Optionally, the gasket body includes the violently piece and locates the lateral plate at violently piece both ends, two the lateral plate with the junction of violently piece all is equipped with the installing port, two the sub-gasket with the gasket body encloses to establish and forms the thick liquids export.

Optionally, a diversion gap is formed at one end of the sub-gasket, which is close to the slurry outlet.

Optionally, a diversion chute communicated with the diversion notch is formed on the top wall of the back of the sub-gasket.

Optionally, the sub-gasket is provided with a clamping part, and a clamping groove matched with the clamping part in a clamping way is formed in the position of the gasket body corresponding to the clamping part.

In order to achieve the above object, the present invention also proposes a coating die comprising:

the upper die head is provided with a dispensing hole for introducing insulating glue;

the lower die head is fixedly connected with the upper die head;

the coating gasket is clamped between the upper die head and the lower die head and is surrounded to form a coating slit, the coating slit is communicated with the slurry outlet, and the colloid flow channel is communicated with the dispensing hole; and

the plurality of adjusting blocks are arranged on the upper die side by side and extend into the coating slit;

the coated gasket includes:

the gasket body is provided with a mounting port; and

In the technical scheme of the invention, the coating gasket comprises the gasket body and the sub gasket, the gasket body is provided with the mounting opening, the sub gasket is detachably mounted in the mounting opening, and the sub gasket is provided with the colloid flow passage communicated with the dispensing hole of the upper die head and the colloid outlet communicated with the colloid flow passage, so that the dispensing is simultaneously carried out in the coating process, the sub gasket is arranged in a replaceable manner, the suitability of the gasket is improved, the requirements of different coating and dispensing processes can be met, the waste of the gasket is reduced, and the processing period is shortened.

Drawings

In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings that are required in the embodiments or the description of the prior art will be briefly described, and it is obvious that the drawings in the following description are only some embodiments of the present invention, and other drawings may be obtained according to the structures shown in these drawings without inventive effort for a person skilled in the art.

FIG. 1 is a schematic view of an embodiment of a coated gasket according to the present invention;

FIG. 2 is a front view of one embodiment of a coated gasket of the present invention;

FIG. 3 is a rear view of one embodiment of a coated gasket of the present invention;

FIG. 4 is a front view of a sub-gasket in an embodiment of a coated gasket of the present invention;

fig. 5 is a rear view of a sub-gasket in an embodiment of a coated gasket of the present invention.

Reference numerals illustrate:

10. a gasket body; 20. a sub-gasket; 10a, a mounting port; 20a, a colloid flow channel; 20b, a glue outlet; 20c, through holes; 211. a first dispensing runner section; 212. a second dispensing runner section; 213. a third dispensing runner section; 212a, communicating hole flanging; 20d, a containing groove; 214. a buffer section; 11. a transverse sheet; 12. a side panel; 10b, a slurry outlet; 20e, a shunt notch; 20f, a split chute; 201. and a clamping part.

The achievement of the objects, functional features and advantages of the present invention will be further described with reference to the accompanying drawings, in conjunction with the embodiments.

Detailed Description

The following description of the embodiments of the present invention will be made clearly and fully with reference to the accompanying drawings, in which it is evident that the embodiments described are only some, but not all embodiments of the invention. All other embodiments, which can be made by those skilled in the art based on the embodiments of the invention without making any inventive effort, are intended to be within the scope of the invention.

It should be noted that, if directional indications (such as up, down, left, right, front, and rear … …) are included in the embodiments of the present invention, the directional indications are merely used to explain the relative positional relationship, movement conditions, etc. between the components in a specific posture (as shown in the drawings), and if the specific posture is changed, the directional indications are correspondingly changed.

In addition, if there is a description of "first", "second", etc. in the embodiments of the present invention, the description of "first", "second", etc. is for descriptive purposes only and is not to be construed as indicating or implying a relative importance or implicitly indicating the number of technical features indicated. Thus, a feature defining "a first" or "a second" may explicitly or implicitly include at least one such feature. In addition, if the meaning of "and/or" is presented throughout this document, it is intended to include three schemes in parallel, taking "a and/or B" as an example, including a scheme, or B scheme, or a scheme where a and B meet simultaneously. In addition, the technical solutions of the embodiments may be combined with each other, but it is necessary to base that the technical solutions can be realized by those skilled in the art, and when the technical solutions are contradictory or cannot be realized, the combination of the technical solutions should be considered to be absent and not within the scope of protection claimed in the present invention.

The invention provides a coating gasket which is suitable for a coating die head, in particular to a high-temperature slurry coating die head, and is not limited herein.

Referring to fig. 1 to 3, in an embodiment of the present invention, the coated gasket includes a gasket body 10 and a sub-gasket 20; the gasket body 10 is provided with a mounting opening 10a; the sub-gasket 20 is detachably mounted in the mounting port 10a, and the sub-gasket 20 is provided with a glue flow passage 20a communicated with the glue dispensing hole of the upper die head and a glue outlet 20b communicated with the glue flow passage 20 a.

In this embodiment, the gasket body 10 may include two lateral pieces 11 and side pieces 12, where the two lateral pieces 12 are respectively disposed at two ends of the lateral piece 11 and form a slurry outlet 10b with the lateral piece 11; or the gasket body 10 may include a transverse sheet 11, two side sheets 12 and at least one middle outlet sheet, the two side sheets 12 are respectively arranged at two ends of the transverse sheet 11, the at least one middle outlet sheet is arranged in the middle of the transverse sheet 11, and the transverse sheet 11, the side sheets 12 and the middle outlet sheet are surrounded to form at least two slurry outlets 10b. Of course, in some other embodiments, the gasket body 10 may also take other configurations, which are not specifically limited herein.

In this embodiment, the width of the slurry outlet 10b can be changed by changing the sub-gaskets 20 having different lateral widths, thereby adapting to different coating processes. In addition, the sub-gasket 20 may also be configured with different dispensing parameters, such as the width of the glue flow channel 20a, the width of the glue outlet 20b, etc., so as to match different dispensing processes.

In the present embodiment, the removable structure of the sub-gasket 20 and the gasket body 10 may be realized by a clamping or a threaded connection, which is not limited herein.

In the technical scheme of the invention, as the coating gasket comprises the gasket body 10 and the sub gasket 20, the gasket body 10 is provided with the mounting opening 10a, the sub gasket 20 is detachably mounted in the mounting opening 10a, the sub gasket 20 is provided with the colloid flow channel 20a communicated with the dispensing hole of the upper die head and the colloid outlet 20b communicated with the colloid flow channel 20a, the simultaneous dispensing in the coating process is realized, the sub gasket 20 is arranged in a replaceable manner, the adaptability of the gasket is improved, the different coating and dispensing process requirements can be met, the waste of the gasket is reduced, and the processing period is shortened.

Referring to fig. 4 and 5, in an embodiment, the sub-gasket 20 is provided with a through hole 20c, the feeding end of the glue flow channel 20a is communicated with the through hole 20c, and the through hole 20c is used for communicating with the dispensing hole of the upper die head so as to be convenient for communicating with the dispensing system.

In some application scenarios, the coating die head needs to be provided with an adjusting mechanism such as an adjusting block and the like to locally adjust the slurry flow, the adjusting block embedded in the upper die head collides with the position of the dispensing hole, and insulating glue in the dispensing hole can enter a gap between the adjusting block and the upper die head to cause leakage.

In this regard, the present invention provides further adaptive improvements to the coated gasket, as follows:

referring to fig. 4 and 5, in the present embodiment, the glue flow channel 20a may include a first dispensing flow channel segment 211, a second dispensing flow channel segment 212, and a third dispensing flow channel segment 213 that are sequentially connected from a feeding end to a discharging end. The sub-gasket 20 has a front surface and a back surface opposite to each other, the first dispensing runner section 211 and the third dispensing runner section 213 are disposed on the front surface of the sub-gasket 20, the second dispensing runner section 212 is disposed on the back surface of the sub-gasket 20, and the connection parts between the second dispensing runner section 212 and the first dispensing runner section 211, and between the second dispensing runner section 212 and the third dispensing runner section 213 are provided with communication hole flanging 212a, so that the whole glue runner 20a is communicated.

Further, referring mainly to fig. 4, a receiving groove 20d may be provided on the front surface of the sub-gasket 20 corresponding to the position of the second dispensing runner section 212 for receiving the adjusting block of the upper die.

It can be appreciated that, by arranging the second dispensing runner segment 212 on the back of the sub-gasket 20, the processing space of the accommodating groove 20d can be reserved on the front of the sub-gasket 20, avoiding the adjusting block, realizing the physical isolation between the dispensing hole of the upper die head and the adjusting block, and avoiding the slurry from entering between the adjusting block and the gasket to a certain extent.

In this embodiment, the inlet of the glue flow channel 20a on the sub-gasket 20 is a through hole 20c, the through hole 20c is communicated with the glue dispensing hole of the upper die head, the front surface of the sub-gasket 20 is subjected to half-groove milling operation to form a first glue dispensing flow channel section 211 and a third glue dispensing flow channel section 213, the back surface of the corresponding position of the adjusting block is subjected to half-groove milling operation to form a second glue dispensing flow channel section 212, and the first glue dispensing flow channel section 211, the third glue dispensing flow channel section 213 and the second glue dispensing flow channel section 212 are all communicated through the communication hole 212 a.

Referring to fig. 4 and 5, in an embodiment, the glue flow channel 20a may further include a buffer section 214, a feeding end of the buffer section 214 is communicated with the third dispensing flow channel section 213, and a discharging end of the buffer section 214 forms a glue outlet 20b to slow down a flow rate of the insulation glue, so as to further improve a dispensing effect.

In this embodiment, the buffer section 214 may be configured as a hollow structure or a sink structure, which is not limited herein.

Referring to fig. 1 to 3, in an embodiment, the gasket body 10 may include a transverse sheet 11 and side sheets 12 disposed at two ends of the transverse sheet 11, where the connection between the two side sheets 12 and the transverse sheet 11 is provided with an installation opening 10a, and two sub-gaskets 20 and the gasket body 10 enclose to form a slurry outlet 10b.

Referring to fig. 1 to 5, in this embodiment, a diversion gap 20e may be formed at an end of the sub-gasket 20 near the slurry outlet 10b.

When the slurry is applied, the edge of the slurry is thick due to the viscosity of the slurry being large, the surface tension being large, and the like. Therefore, by providing the diversion gap 20e at the front end of the sub-gasket 20, the slurry in the thick region of the coating slurry edge can be flowed to both sides, and the coating thickness can be reduced.

Further, referring mainly to fig. 4 and 5, the rear top wall of the sub-gasket 20 may be provided with a diverting chute 20f communicating with the diverting notch 20e to further enhance the diverting effect, thereby reducing the thickness of the coating-slurry edge.

Referring to fig. 1 to 4, in an embodiment, the sub-gasket 20 may be provided with a clamping portion 201, and a clamping groove corresponding to the clamping portion 201 of the gasket body 10 is provided. Therefore, the dismounting and mounting can be facilitated, the convenience of replacing the sub-gaskets 20 is improved, and the production efficiency is further improved.

The present invention also proposes a coating die comprising a coating pad, the specific structure of which is referred to above embodiments, and since the coating die proposed by the present invention comprises all the solutions of all the embodiments of the coating pad described above, it has at least the same technical effects as the coating pad, which are not described herein.

In one embodiment of the invention, the coating die comprises an upper die, a lower die, a coating gasket and a regulating block; the upper die head is provided with a dispensing hole for introducing insulating glue; the lower die head is fixedly connected with the upper die head; the coating gasket is clamped between the upper die head and the lower die head and is surrounded to form a coating slit, the coating slit is communicated with the slurry outlet 10b, and the colloid flow passage 20a is communicated with the dispensing hole; the regulating blocks are arranged on the upper die head side by side and extend into the coating slit.

In the technical scheme of the invention, referring to fig. 1 to 4, since the coating gasket of the coating die head comprises a gasket body 10 and a sub gasket 20, the gasket body 10 is provided with a mounting port 10a, the sub gasket 20 is detachably mounted in the mounting port 10a, the sub gasket 20 is provided with a colloid flow channel 20a communicated with a dispensing hole of the upper die head and a colloid outlet 20b communicated with the colloid flow channel 20a, the simultaneous dispensing in the coating process is realized, the sub gasket 20 is arranged in a replaceable manner, the suitability of the gasket is improved, the requirements of different coating and dispensing processes can be met, the waste of the gasket is reduced, and the processing period is shortened.

The foregoing description is only of the optional embodiments of the present invention, and is not intended to limit the scope of the invention, and all the equivalent structural changes made by the description of the present invention and the accompanying drawings or the direct/indirect application in other related technical fields are included in the scope of the invention.

Claims

1. A coated gasket comprising:

a gasket body (10) provided with an installation opening (10 a); and

the sub-gasket (20), the sub-gasket (20) is detachably installed in the installation opening (10 a), and the sub-gasket (20) is provided with a colloid flow channel (20 a) communicated with a dispensing hole of an upper die head and a colloid outlet (20 b) communicated with the colloid flow channel (20 a);

the gel runner (20 a) comprises a first dispensing runner section (211), a second dispensing runner section (212) and a third dispensing runner section (213) which are sequentially communicated from a feeding end to a discharging end of the gel runner;

the sub-gasket (20) is provided with a front surface and a back surface which are opposite, the first dispensing runner section (211) and the third dispensing runner section (213) are arranged on the front surface of the sub-gasket (20), the second dispensing runner section (212) is arranged on the back surface of the sub-gasket (20), and the connection parts of the second dispensing runner section (212) and the first dispensing runner section (211), the second dispensing runner section (212) and the third dispensing runner section (213) are provided with communication hole flanging (212 a).

2. The coating gasket of claim 1, wherein the sub-gasket (20) is provided with a through hole (20 c), the feed end of the glue flow channel (20 a) is communicated with the through hole (20 c), and the through hole (20 c) is used for being communicated with a dispensing hole of the upper die head.

3. The coating gasket of claim 1, wherein a receiving groove (20 d) is provided on the front surface of the sub-gasket (20) corresponding to the second dispensing runner segment (212) for receiving an adjusting block of the upper die.

4. The coating gasket of claim 1, wherein the glue flow channel (20 a) further comprises a buffer section (214), a feed end of the buffer section (214) being in communication with the third glue flow channel section (213), a discharge end of the buffer section (214) forming the glue outlet (20 b).

5. The coated gasket of any one of claims 1 to 4, wherein the gasket body (10) comprises a transverse sheet (11) and side sheets (12) arranged at two ends of the transverse sheet (11), the connection parts of the two side sheets (12) and the transverse sheet (11) are respectively provided with the mounting opening (10 a), and the two sub gaskets (20) and the gasket body (10) are surrounded to form a slurry outlet (10 b).

6. A coated gasket according to claim 5, wherein the end of the sub-gasket (20) adjacent to the slurry outlet (10 b) is provided with a split gap (20 e).

7. The coated gasket of claim 6 wherein the backside top wall of said sub-gasket (20) is provided with a diverter chute (20 f) in communication with said diverter gap (20 e).

8. The coating gasket according to claim 6, wherein the sub gasket (20) is provided with a clamping portion (201), and the gasket body (10) is provided with a clamping groove adapted to the clamping portion (201).

9. A coating die, comprising:

the lower die head is fixedly connected with the upper die head;

the coating gasket according to any one of claims 5 to 8, wherein the coating gasket is sandwiched between the upper die head and the lower die head and surrounds to form a coating slit, the coating slit is communicated with the slurry outlet (10 b), and the colloid flow channel (20 a) is communicated with the dispensing hole; and

the plurality of adjusting blocks are arranged on the upper die side by side and extend into the coating slit.