CN218797015U

CN218797015U - Extrusion coating gasket and coating machine

Info

Publication number: CN218797015U
Application number: CN202223288555.XU
Authority: CN
Inventors: 余至简; 丁水涔; 王英超; 王文焯; 闫晓冰
Original assignee: Chongqing Talent New Energy Co Ltd
Current assignee: Chongqing Talent New Energy Co Ltd
Priority date: 2022-12-08
Filing date: 2022-12-08
Publication date: 2023-04-07
Anticipated expiration: 2032-12-08

Abstract

The utility model belongs to the technical field of coating equipment, a extrusion coating gasket and coating machine is disclosed. The extrusion coating gasket comprises a gasket body, wherein the gasket body is of a frame-shaped structure with a discharge hole at the top; the inside bottom surface demountable installation of gasket body has at least one baffle, and the baffle extends to discharge gate department and separates into two at least sub-discharge gates with the discharge gate by gasket body bottom, and the top of baffle flushes with the top of discharge gate. This extrusion coating gasket simple structure has realized once coating out a plurality of function of scribbling the material area through the baffle that flushes with the discharge gate top, and the width size of these a plurality of coating areas is more accurate, the coating quality is higher, has improved coating efficiency and coating quality.

Description

Extrusion coating gasket and coating machine

Technical Field

The utility model relates to a coating equipment technical field especially relates to an extrusion coating gasket and coating machine.

Background

Coating is a method of applying a paste polymer, a molten polymer or a polymer melt to paper, cloth, a plastic film or the like to obtain a composite material (film). Currently, common coating processes are used in the market, mainly knife coating, roll coating, ultrasonic spraying and slit coating. The coating mode of the lithium ion battery pole piece mainly comprises comma roller transfer coating, slit extrusion coating and the like at present. The coating process of the lithium battery is to uniformly coat the positive and negative electrode slurry on a base material (such as a metal foil). Slit extrusion coating is a precise coating technology, and the working principle is that slurry is extruded and sprayed out along the gap of a coating die under a certain pressure and a certain flow rate and 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 system is closed, pollutants can be prevented from entering in the coating process, the utilization rate of the slurry is high, and the stable property of the slurry can be kept.

In the prior art, the width of a coating gasket diversion trench of an extrusion type coating machine is not adjustable, and when a user needs to coat coating tapes with different widths by the coating machine, the coating gasket corresponding to the width of the coating tape is often required to be replaced; when coating different width pole pieces, need be equipped with the gasket of multiple different specifications, even reach more than ten kinds, dozens of gasket, this undoubtedly can increase manufacturing cost to the gasket production cycle is longer, causes the extension of production time and cycle, has reduced production efficiency. Meanwhile, when a plurality of coating tapes need to be coated on the same product, the coating can be realized by repeated coating, so that the production efficiency is low.

Therefore, there is a need to provide a novel extrusion coated gasket to solve the technical problems in the prior art.

SUMMERY OF THE UTILITY MODEL

An object of the utility model is to provide an extrusion coating gasket can scribble many coating tapes according to the demand simultaneously, has improved production efficiency, has reduced manufacturing cost.

To achieve the purpose, the utility model adopts the following technical proposal:

the extrusion coating gasket comprises a gasket body, wherein the gasket body is of a frame-shaped structure with a discharge hole at the top; at least one baffle is detachably mounted on the bottom surface inside the gasket body, the baffle extends to the discharge hole from the bottom of the gasket body and divides the discharge hole into at least two sub-discharge holes, and the top end of the baffle is flush with the top end of the discharge hole.

Optionally, the baffle plates are provided in plurality, and the baffle plates are arranged along the width direction of the discharge port at intervals or in a parallel joint manner.

Optionally, one of the gasket body and the baffle plate is provided with at least two mounting grooves, and the other is provided with at least one mounting tooth, and the mounting tooth can be inserted into any one of the mounting grooves.

Optionally, chamfers or fillets are arranged on two sides of the top end of the baffle.

Optionally, the extrusion coating gasket further includes an adjusting head, and the adjusting head is adjustably mounted on the top of the gasket body and extends toward the center of the discharge hole to adjust the width of the discharge hole.

Optionally, an adjusting portion is detachably mounted at one end of the adjusting head close to the center of the discharge hole, and the adjusting portion extends towards the center of the discharge hole.

Optionally, the number of the adjusting heads is two, and the two adjusting heads are oppositely arranged at two ends of the top of the gasket body, which form the discharge hole.

Optionally, one of the gasket body and the adjusting head is provided with at least two slots, and the other is provided with at least one gear shaping, and the gear shaping can be inserted into any slot.

Optionally, the gasket body is provided with a fixing member and a chute extending in the width direction of the discharge port, the adjusting head is provided with a sliding portion, the sliding portion is slidably connected to the chute, and the fixing member is used for fixing the sliding portion at any position of the chute.

Another object of the present invention is to provide a coater, which includes the extrusion coating gasket according to any of the above-mentioned aspects.

Has the advantages that:

the extrusion coating gasket of the utility model is provided with at least one baffle at the discharge port of the gasket body, and the baffle shields the discharge port so that the discharge port is divided into at least two sub-discharge ports, thereby enabling the extrusion coating gasket to coat at least two coating tapes at one time; and the top of baffle and the top of discharge gate flush for when thick liquids were extruded the coating from sub-discharge gate, the side of thick liquids contacted with the baffle all the time, and the edge of scribbling the area can not appear phenomenon such as turn-ups, hunch-up, and the width of sub-discharge gate is the width of scribbling the area promptly, and fashioned scribble area size is more accurate, and the quality is higher. This extrusion coating gasket simple structure has realized once coating out a plurality of function of scribbling the material area through the baffle that flushes with the discharge gate top, and the width size in these a plurality of material areas is more accurate, the coating quality is higher, has improved coating efficiency and coating quality.

Drawings

FIG. 1 is a front view of an extrusion coated gasket in accordance with an embodiment of the present invention;

FIG. 2 is a front view of an extrusion coated gasket with a hidden baffle according to an embodiment of the present invention;

FIG. 3 is a comparison of an embodiment of the present invention providing an extrusion coated gasket having an adjustment head in different positions;

fig. 4 is a front view of an extrusion coated gasket in accordance with another embodiment of the present invention.

In the figure:

100. a gasket body; 101. a sub-discharge port; 110. a slot; 120. mounting grooves;

210. an adjustment head; 201. chamfering; 211. gear shaping; 220. an adjustment section;

300. a baffle plate; 310. and (7) mounting the teeth.

Detailed Description

The present invention will be described in further detail with reference to the accompanying drawings and examples. It is to be understood that the specific embodiments described herein are merely illustrative of the invention and are not limiting of the invention. It should be further noted that, for the convenience of description, only some of the structures related to the present invention are shown in the drawings, not all of the structures.

In the description of the present invention, unless otherwise explicitly specified or limited, the terms "connected", "connected" and "fixed" are to be construed broadly, e.g., as being fixedly connected, detachably connected, or integrated; can be mechanically or electrically connected; either directly or indirectly through intervening media, either internally or in any other relationship. The specific meaning of the above terms in the present invention can be understood in specific cases to those skilled in the art.

In the present disclosure, unless expressly stated or limited otherwise, the first feature "on" or "under" the second feature may comprise direct contact between the first and second features, or may comprise contact between the first and second features not directly. Also, the first feature being "on," "above" and "over" the second feature includes the first feature being directly on and obliquely above the second feature, or merely indicating that the first feature is at a higher level than the second feature. A first feature being "under," "below," and "beneath" a second feature includes the first feature being directly under and obliquely below the second feature, or simply meaning that the first feature is at a lesser elevation than the second feature.

In the description of the present embodiment, the terms "upper", "lower", "right", etc. are used in an orientation or positional relationship based on that shown in the drawings only for convenience of description and simplicity of operation, and do not indicate or imply that the device or element 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. Furthermore, the terms "first" and "second" are used only for descriptive purposes and are not intended to have a special meaning.

The first direction in this embodiment is the X direction shown in fig. 1, that is, the width direction of the discharge port of the extrusion coating gasket.

The present embodiment provides an extrusion coating shim capable of adjusting the width of a coating tape to be coated and coating a plurality of coating tapes at a time, improving coating efficiency and production efficiency, and reducing production costs.

Referring to fig. 1, the extrusion coating gasket includes a gasket body 100 and a baffle 300, wherein the gasket body 100 is a frame structure having a discharge hole; at least one baffle 300 is detachably mounted on the bottom surface of the gasket body 100, the baffle 300 extends from the bottom of the gasket body 100 to the discharge hole and divides the discharge hole into at least two sub-discharge holes 101, and the top end of the baffle 300 is flush with the top end of the discharge hole.

In the extrusion coating gasket in this embodiment, at least one baffle 300 is arranged at the discharge port of the gasket body 100, and the baffle 300 shields the discharge port so that the discharge port is divided into at least two sub-discharge ports 101, specifically, if N baffles are arranged, the discharge port is divided into N +1 sub-discharge ports 101, so that N +1 coating tapes can be coated on a pole piece substrate (such as a metal foil) at one time by the extrusion coating gasket; and the top of baffle 300 is flush with the top of discharge gate for thick liquids are being followed sub-discharge gate 101 and are being extruded the in-process of coating, and the side of scribbling the area contacts with baffle 300 all the time, and the edge of scribbling the area can not appear phenomenon such as turn-ups, hunch-up, and the width of sub-discharge gate 101 is the width of scribbling the area, and fashioned scribbling area size is more accurate, and the quality is higher. This extrusion coating gasket simple structure has realized once coating out a plurality of functions of scribbling the material area through the baffle 200 that flushes with the discharge gate top, and the width size in these a plurality of coating areas is more accurate, the coating quality is higher, has improved coating efficiency and coating quality.

The extrusion coating gasket is arranged between the upper die head and the lower die head of the extrusion coating machine, the upper die head and the lower die head clamp and fix the extrusion coating gasket, and the slurry is extruded at the discharge port of the extrusion coating gasket, so that the pole piece base material is coated, and a better using effect is achieved.

It should be understood that the above-mentioned electrode plate substrate refers to a current collector of a lithium ion battery, and the material of the current collector may be not only a metal conductor material such as copper, aluminum, nickel, and stainless steel, but also a semiconductor material such as carbon, and a composite material. In the prior art, the base material of the negative electrode plate generally adopts copper foil, and the base material of the positive electrode plate generally adopts aluminum foil.

Specifically, the extrusion coating gasket further includes an adjusting head 210, where the adjusting head 210 is installed on the top of the gasket body 100, and the position of the adjusting head 210 is adjustable, that is, the adjusting head 210 can move on the gasket body 100 along a first direction, so as to implement a function of adjusting the width of the discharge port; in the extrusion coating gasket in the embodiment, the adjusting head 210 capable of shielding part of the discharge hole is arranged on the gasket body 100, and the adjusting head 210 can move on the gasket body 100 along the first direction, so that the size of the discharge hole is adjusted; and discharge gate department still installs baffle 300, and baffle 300 shelters from the discharge gate and makes the discharge gate be divided into two sub-discharge gates 101, and then makes this extrusion coating gasket can once coat out two coating tapes to baffle 300 can move on gasket body 100 along first direction equally, realizes the regulation of sub-discharge gate 101 size. The extrusion coating gasket is simple in structure, the width of a coating tape coated by a single gasket can be adjusted, and the cost for repeatedly manufacturing gaskets with different discharge ports is reduced; and baffle 300 has realized once coating out the function of a plurality of coating strips, and the width of these a plurality of coating strips can be realized adjusting through the position of removing baffle 300 and adjusting head 210, satisfies different coating strip width demands, and application scope is wide, has improved coating efficiency.

Optionally, the adjusting head 210 is detachably mounted with an adjusting portion 220 along a width direction (i.e. X direction) of the discharge opening and near one end of the discharge opening, and the adjusting portion 220 extends to a center of the discharge opening along the X direction. Through the above-mentioned regulating part 220 of installing different length on adjusting head 210, can further realize the regulation of discharge gate width, the structure and the shape of regulating part 220 are simple, and low in manufacturing cost need not to make the complicated regulation head 210 of shape of different length and can realize the regulation of discharge gate width, has reduced material cost.

Further, two adjusting heads 210 are provided, and the two adjusting heads 210 are oppositely provided at two ends of the discharge hole. The two adjusting heads 210 are arranged, the size of the discharge port is adjusted from two ends, the blocking adjusting range of the adjusting heads 210 can be further enlarged, and the extrusion coating gasket can be conveniently coated with coating tapes with different widths.

The manner in which the adjustment head 210 is mounted and moved on the gasket body 100 in this embodiment is described in detail below with reference to fig. 2 and 3. Specifically, one of the gasket body 100 and the adjusting head 210 is provided with at least two slots 110, and the other is provided with at least one gear 211, and the gear 211 can be inserted into any one or more slots 110. Specifically, in the present embodiment, as shown in fig. 1, the spacer body 100 is provided with a plurality of slots 110, the adjusting head 210 is provided with a plurality of teeth 211 engaged with the slots 110, and the slots 110 and the teeth 211 are not repeatedly marked in fig. 2 and 3. Since the extrusion coating shim is clamped and fixed between the upper die head and the lower die head in the thickness direction, the positioning and fixing of the adjusting head 210 in the length direction of the shim can be considered. The adjustment head 210 can be reliably fixed on the gasket body 100 through the cooperation of the gear shaping 211 and the slot 110; the adjustment of the position of the adjusting head 210 can be realized by inserting the gear shaping 211 into the slots 110 at different positions, and the adjusting mode is simple and easy to process and manufacture.

The slot 110 and the mounting groove 120 in this embodiment are semicircular, zigzag, trapezoidal, V-shaped or rectangular, and in this embodiment, a rectangular groove is selected, and the gear shaping 211 and the mounting tooth 310 present a rectangular tooth matched with the rectangular groove.

Further, the number of the slots 110 may be greater than the number of the gear teeth 211, so that the variation range of the insertion position between the gear teeth 211 and the slots 110 is wider, and the width adjustment range of the discharge hole is further increased.

In another alternative embodiment, the difference from the above embodiment is only in the installation and moving manner of the adjusting head 210 on the gasket body 100, that is, in this embodiment, the gasket body 100 is provided with a sliding slot extending along the first direction, a sliding portion (not shown in the figure) of the adjusting head 210 is slidably connected to the sliding slot, and after the adjusting head 210 is installed in place, the sliding portion is fixed in the sliding slot by using a fixing member (not shown in the figure). The position of the adjusting head 210 can be changed by sliding the adjusting head 210 in the sliding groove, and the adjusting head 210 can be moved gently to change the position of the adjusting head 210, so that the width of the discharge port can be adjusted continuously, and the adjusting range can be further increased compared with the discontinuous position adjustment of the matching of the gear shaping 211 and the slot 110.

As shown in fig. 1, the end of the adjusting head 210 and the end of the baffle 300 near the center of the discharge hole are both provided with chamfers 201 or fillets. Specifically, the adjusting head 210, the baffle 300 and the adjusting portion 220 are provided with a chamfer 201 at one end close to the pole piece to be coated, and the chamfer 201 is used for controlling the coating thickness (thinning the thickness of two side edges of the coating tape), preventing the two side edges of the coating tape from being thick and bulging, and enabling the winding form of the coated material tape (after the coated pole piece is wound) to be more flat.

As shown in fig. 4, in the present embodiment, a plurality of the baffle plates 300 are provided, and the plurality of baffle plates 300 are arranged at intervals or in parallel along the first direction. Specifically, when the baffles 300 are arranged at intervals, 1 baffle 300 is arranged to divide the discharge port into 2 sub-discharge ports 101, 2 baffles 300 are arranged to divide the discharge port into 3 sub-discharge ports 101, and by analogy, the N baffles 300 are arranged to divide the discharge port into N +1 sub-discharge ports 101, and the production efficiency can be improved by arranging the plurality of baffles 300 in mass production; when baffles 300 are arranged in a parallel and attached mode, the width of the sub-discharge port 101 can be adjusted by increasing or decreasing the number of the baffles 300, and the baffles are convenient to install and quick to adjust.

Further, one of the gasket body 100 and the baffle 300 is provided with at least two mounting grooves 120, and the other is provided with at least one mounting tooth 310, and the mounting tooth 310 can be inserted into any one or more of the mounting grooves 120. In this embodiment, as shown in fig. 1, the gasket body 100 is provided with a plurality of mounting grooves 120, and the bottom end of the baffle 300 is provided with mounting teeth 310 that are engaged with the mounting grooves 120. The position of the baffle 300 can be adjusted by inserting the mounting teeth 310 into the mounting grooves 120 at different positions, and the adjusting mode is simple and easy to process and manufacture. The number and position of the baffle 300, the shape and number of the mounting grooves 120 and the mounting teeth 310 in this embodiment can be adjusted according to the coating requirement, and are not limited in this embodiment.

Another object of the present invention is to provide a coater, which includes the extrusion coating gasket according to any of the above-mentioned aspects. By adopting the extrusion coating gasket in the embodiment, the coating machine can realize the adjustment of the size of the discharge hole by changing the position of the adjusting head 210, so that the coating machine can coat different pole pieces under the condition of not replacing the extrusion coating gasket, the production equipment cost is reduced, and the economic benefit is better; meanwhile, a plurality of coating tapes can be coated at one time through the baffle 300 on the gasket body 100, and the production efficiency is improved.

It is to be understood that the above-described embodiments of the present invention are merely examples for clearly illustrating the present invention and are not intended to limit the embodiments of the present invention. Numerous obvious variations, rearrangements, and substitutions will now occur to those skilled in the art without departing from the scope of the invention. This need not be, nor should it be exhaustive of all embodiments. Any modification, equivalent replacement, and improvement made within the spirit and principle of the present invention should be included in the protection scope of the claims of the present invention.

Claims

1. The extrusion coating gasket comprises a gasket body (100), wherein the gasket body (100) is of a frame-shaped structure with a discharge hole at the top; it is characterized in that the preparation method is characterized in that,

the inside bottom surface demountable installation of gasket body (100) has at least one baffle (300), baffle (300) by gasket body (100) bottom extends to discharge gate department and will at least two sub-discharge gates (101) are separated into to the discharge gate, the top of baffle (300) with the top of discharge gate flushes.

2. The extrusion coated gasket as recited in claim 1 wherein the baffle (300) is provided in plurality, and the plurality of baffles (300) are attached to each other at intervals or in parallel along the width direction of the discharge port.

3. The extrusion coated gasket as recited in claim 1 wherein at least two mounting grooves (120) are provided on one of the gasket body (100) and the baffle (300), and at least one mounting tooth (310) is provided on the other, the mounting tooth (310) being insertable into any of the mounting grooves (120).

4. Extrusion coated gasket according to any of claims 1-3, wherein the baffle (300) is provided with chamfers (201) or fillets on both sides of its top end.

5. The extrusion coated gasket as set forth in claim 1 further comprising an adjustment head (210), said adjustment head (210) being adjustably mounted to the top of said gasket body (100) and extending toward the center of said spout to adjust the width of said spout.

6. The extrusion coated gasket as set forth in claim 5 wherein said regulating head (210) has a regulating portion (220) removably mounted at an end thereof proximate to a center of said spout, said regulating portion (220) extending toward said center of said spout.

7. The extrusion coated gasket as recited in claim 5, wherein the adjusting heads (210) are provided in two, and the two adjusting heads (210) are oppositely arranged at two ends of the top of the gasket body (100) forming the discharge port.

8. The extrusion coated gasket as recited in any one of claims 5 to 7, wherein at least two slots (110) are provided on one of the gasket body (100) and the adjusting head (210), and at least one gear (211) is provided on the other, and the gear (211) can be inserted into any of the slots (110).

9. The extrusion coated gasket as set forth in any one of claims 5 to 7, wherein said gasket body (100) is provided with a fixing member and a sliding groove extending in a width direction of said discharge port, and said adjusting head (210) is provided with a sliding portion slidably connected to said sliding groove, said fixing member being used for fixing said sliding portion at any position of said sliding groove.

10. A coater comprising the extrusion coated shim of any one of claims 1-9.