WO2019227654A1 - 弯道式挤压涂布头 - Google Patents
弯道式挤压涂布头 Download PDFInfo
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- WO2019227654A1 WO2019227654A1 PCT/CN2018/097870 CN2018097870W WO2019227654A1 WO 2019227654 A1 WO2019227654 A1 WO 2019227654A1 CN 2018097870 W CN2018097870 W CN 2018097870W WO 2019227654 A1 WO2019227654 A1 WO 2019227654A1
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B05—SPRAYING OR ATOMISING IN GENERAL; APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
- B05C—APPARATUS FOR APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
- B05C5/00—Apparatus in which liquid or other fluent material is projected, poured or allowed to flow on to the surface of the work
- B05C5/005—Curtain coaters
Definitions
- the present invention relates to an improvement of an extrusion coating head, in particular to a curved type coating pressure coating head.
- a conventional extrusion coating head includes a first coating lip 100 and a second coating lip 200, and is provided between the first coating lip 100 and the second coating lip 200.
- a gasket which separates the first coating lip 100 and the second coating lip 200 to form a coating slit 300, and applies one of the first coating lip 100 and the second coating lip 200
- a lip 310 is provided on the lip, and the hopper 310 communicates with the coating slit 300.
- the main reasons for the tailing phenomenon are as follows: First, the slurry on the opposite side of the first coating lip 100 and the second coating lip 200 is opposite to the slurry.
- the second is the pressure of the slurry remaining in the hopper 300 on the slurry in the slit 400 when the coating is stopped.
- the pressure of the slurry on the slurry in the slit 400 is equal to or less than the resistance to the slurry on the opposite sides of the first coating lip 100 and the second coating lip 200, There will be tailing, and vice versa.
- the resistance of the opposite sides of the first coating lip 100 and the second coating lip 200 to the slurry is determined by two factors.
- the first factor is the relative relationship between the first coating lip 100 and the second coating lip 200.
- the smoothness of the surface Of course, if greater resistance is required, the rougher the opposite surface of the first coating lip 100 and the second coating lip 200 is, the better.
- the second factor is the viscosity of the slurry. In the actual manufacturing process of the extrusion coating head, considering other coating effects during coating, such as coating uniformity, the more uniform the coating is, the better; during the coating process, the slurry layer to be coated should be No spots caused by air bubbles can occur.
- the opposite surface of the first coating lip 100 and the second coating lip 200 must be made with a higher finish.
- the viscosity of the slurry is constant for each slurry. It cannot be changed arbitrarily.
- the pressure of the remaining slurry on the slurry in the slit has a large effect on the tailing phenomenon during coating.
- the present invention provides a curved type coating pressure coating head which can prevent tailing during coating and is suitable for vertical downward or oblique downward coating.
- the technical solution of the present invention is to provide a curved coating and coating head, which includes a first coating lip and a second coating lip, and is provided between the first coating lip and the second coating lip.
- the slit is a straight-faced slit, and the lower end of the straight-faced slit is a discharge port;
- the second section of the coating slit is an arc-shaped slit, and the arc-shaped slit is provided with a feed slot communicating with the slit.
- the material trough is provided at a high point of the curved surface slit.
- an extension slit which is raised upward is provided on the side of the arcuate slit that is far from the straight slit.
- the extension slit is a straight slit.
- the extension slit is a curved surface slit.
- the angle ⁇ between the straight slit and the horizontal plane is selected between 30 degrees and 90 degrees.
- a contact portion is provided on the coating lip on the side remote from the discharge port.
- the bottom surface of the contact portion is a flat surface or an arc surface.
- the coating slit using the coating head is divided into two sections connected in sequence, the first section of the coating slit is a straight slit, and the lower end of the straight slit is a discharge port; the second section of the coating slit is The seam is a curved surface slit, and the arc surface slit is provided with a structure of a slot that communicates with the slit. Therefore, the present invention can prevent tailing during coating, and is suitable for vertical downward or oblique downward application. The advantages of cloth.
- 1 is a schematic structural diagram of an embodiment of a conventional extrusion coating head
- FIG. 2 is a schematic structural diagram of a first embodiment of the extrusion coating head of the present invention
- FIG. 3 is a schematic structural diagram of a second embodiment of the extrusion coating head of the present invention.
- FIG. 4 is a schematic structural diagram of a third embodiment of the extrusion coating head of the present invention.
- FIG. 5 is a schematic structural view of a fourth embodiment of the extrusion coating head of the present invention.
- FIG. 2 discloses a first embodiment of a curved coating pressure coating head of the present invention, which includes a first coating lip 1 and a second coating lip 2.
- a gasket is provided between the cloth lip 1 and the second coating lip 2, and the gasket separates the first coating lip 1 and the second coating lip 2 to form a coating slit 3.
- Slit 3 is divided into two sections connected in sequence, the first section coating slit 31 is a straight slit, the lower end of the straight slit is a discharge opening 311, and the second coating slit 32 is a curved slit.
- the curved surface slit is provided with a hopper 33 communicating with the slit.
- the volume of the hopper 33 should be such that when the coating machine suspends coating, the slurry can be temporarily stored in the hopper 33 instead of going along the coating.
- the cloth slits flow down, and there is almost no pressure on the slurry in the coating slits.
- the hopper 33 is disposed at a high point of the arc-shaped slit.
- the coating slit using the coating head is divided into two sections connected in sequence.
- the first section of the coating slit 31 is a straight slit, and the lower end of the straight slit is a discharge port 311;
- the cloth slit 32 is an arc-shaped slit, and the arc-shaped slit is provided with a material groove 33 communicating with the slit. Therefore, the present invention has the advantages of preventing tailing during coating and being suitable for vertical downward or oblique The advantages of downward coating.
- an upwardly extending extension slit 34 is provided on the side of the arcuate slit that is far from the straight slit, so as to discharge air bubbles in the slurry.
- the extension slit 34 may be a straight-faced slit (not shown), or may be an arc-shaped slit (as shown in this figure).
- FIG. 3 discloses a second embodiment of a curved coating and coating head of the present invention, which includes a first coating lip 1 and a second coating lip 2.
- a gasket is provided between the cloth lip 1 and the second coating lip 2, and the gasket separates the first coating lip 1 and the second coating lip 2 to form a coating slit 3.
- Slit 3 is divided into two sections connected in sequence, the first section coating slit 31 is a straight slit, the lower end of the straight slit is a discharge opening 311, and the second coating slit 32 is a curved slit.
- the curved surface slit is provided with a hopper 33 communicating with the slit.
- the volume of the hopper 33 should be such that when the coating machine suspends coating, the slurry can be temporarily stored in the hopper 33 instead of going along the coating.
- the cloth slits flow down, and there is almost no pressure on the slurry in the coating slits.
- the hopper 33 is disposed at a high point of the arc-shaped slit.
- the angle ⁇ between the straight-faced slit and the horizontal plane 4 can be selected between 30 degrees and 90 degrees; when the straight-faced slit is arranged obliquely, it is beneficial to arrange extrusion coating in a special space. head.
- the coating slit using the coating head is divided into two sections connected in sequence.
- the first section of the coating slit 31 is a straight slit, and the lower end of the straight slit is a discharge port 311;
- the cloth slit 32 is an arc-shaped slit, and the arc-shaped slit is provided with a material groove 33 communicating with the slit. Therefore, the present invention has the advantages of preventing tailing during coating and being suitable for vertical downward or oblique The advantages of downward coating.
- FIG. 4 discloses a third embodiment of a curved coating and coating head of the present invention, which includes a first coating lip 1 and a second coating lip 2.
- a gasket is provided between the cloth lip 1 and the second coating lip 2, and the gasket separates the first coating lip 1 and the second coating lip 2 to form a coating slit 3.
- Slit 3 is divided into two sections connected in sequence, the first section coating slit 31 is a straight slit, the lower end of the straight slit is a discharge opening 311, and the second coating slit 32 is a curved slit.
- the curved surface slit is provided with a hopper 33 communicating with the slit.
- the volume of the hopper 33 should be such that when the coating machine suspends coating, the slurry can be temporarily stored in the hopper 33 instead of going along the coating.
- the cloth slits flow down, and there is almost no pressure on the slurry in the coating slits.
- the hopper 33 is disposed at a high point of the arc-shaped slit.
- a contact portion 11 is provided on the coating lip on the side remote from the discharge port 4, and the bottom surface 111 of the contact portion 11 is a curved surface structure. This design, when this embodiment is vertically downward When the coating is applied obliquely downward to the substrate, the bottom surface 111 of the contact portion 11 abuts against the front portion of the substrate in the advancing direction of the substrate.
- the slurry outlet 311 is suspended above the substrate, and the slurry outflow 311 flows out in a free state when being coated (that is, it is not affected by any extension of the traditional contact coating lip), and has the same effect as the non-contact coating In this way, the method of contact coating is used to achieve the purpose of non-contact coating effect (in the prior art, the effect of non-contact coating is better than the effect of contact coating).
- FIG. 5 illustrates a fourth embodiment of a curved-type pressure coating head according to the present invention.
- the embodiment shown in FIG. 5 is substantially the same as the embodiment shown in FIG.
- the bottom surface 111 of the contact portion 11 is a flat surface.
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Abstract
一种弯道式涂压涂布头，包括第一涂布唇（1）和第二涂布唇（2），在第一涂布唇（1）和第二涂布唇（2）之间设有垫片，垫片将第一涂布唇（1）和第二涂布唇（2）隔开形成涂布狭缝（3），涂布狭缝（3）分为依次相连接的两截，第一截涂布狭缝（31）为直面狭缝，直面狭缝的下端为出料口（311）；第二截涂布狭缝（32）为弧面狭缝，在弧面狭缝上设有与狭缝相通的料槽（33）。该涂布头可以防止涂布时拖尾，适合垂直向下或者斜着向下涂布。
Description
技术领域
本发明涉及一种挤压涂布头的改进，尤其是一种弯道式涂压涂布头。
背景技术
现有的挤压涂布头，如图1所示，包括第一涂布唇100和第二涂布唇200，在所述第一涂布唇100和第二涂布唇200之间设有垫片，所述垫片将所述第一涂布唇100和第二涂布唇200隔开形成涂布狭缝300，在第一涂布唇100和第二涂布唇200中一个涂布唇上设有料槽310，所述料槽310与所述涂布狭缝300相通。这种挤压涂布头在水平布置或斜着向上布置时，其涂布效果还是令人满意的。但是，这种挤压涂布头在重直向下或者斜着向下布置时，就会出现拖尾现象，所谓拖尾现象就是间歇式涂布时，当要中间停涂时，其浆料不能立即停止，而出的少量拖尾涂布现象，这种拖尾现象在锂电池电极的间歇式涂布过程中是不允许的。
挤压涂布头在垂直向下或者斜着向下布置时，出现拖尾现象的原因主要有以下几点：一是第一涂布唇100和第二涂布唇200相对面的对浆料的阻力，二是停涂时料槽300所剩余的浆料对狭缝400内的浆料的压力。当停涂时，如果浆料对狭缝400内的浆料的压力等于或小于第一涂布唇100和第二涂布唇200相对面的对浆料的阻力，则在出料口500不会出现拖尾现象，反之，就会出现拖尾现象。进一步分析认为，第一涂布唇100和第二涂布唇200相对面的对浆料的阻力决定于两个因素，第一个因素是第一涂布唇100和第二涂布唇200相对面的光洁度，当然，如果要获得较大阻力，需要第一涂布唇100和第二涂布唇200相对面的越粗糙越好，第二个因素是浆料的粘度。在挤压涂布头的实际制造过程中，考虑到涂布时其它涂布效果，如涂布的均匀性，涂布的越均匀越好；涂布过程中，涂布出的浆料层要不能出现气泡造成的斑点等，对第一涂布唇100和第二涂布唇200相对面都要制成光洁度越高越好；而浆料的粘度，对于每一种浆料其粘度是一定的，是不能随便改变的。
因此，剩余的浆料对狭缝内的浆料的压力对于涂布时造成拖尾现象影响较大。
发明内容
针对现有技术的以上缺陷或改进需求，本发明提供了一种可以防止涂布时拖尾，且适合于垂直向下或者斜着向下涂布的弯道式涂压涂布头。
本发明的技术方案是：提供一种弯道式涂压涂布头，包括第一涂布唇和第二涂布唇，在所述第一涂布唇和第二涂布唇之间设有垫片，所述垫片将所述第一涂布唇和第二涂布唇隔开形成涂布狭缝，所述涂布狭缝分为依次相连接的两截，第一截涂布狭缝为直面狭缝，直面狭缝的下端为出料口；第二截涂布狭缝为弧面狭缝，在弧面狭缝上设有与狭缝相通的料槽。
作为对本发明的改进，所述料槽设置在所述弧面狭缝的高点处。
作为对本发明的改进，在所述弧面狭缝的远离直面狭缝一侧设向上翘起的延伸狭缝。
作为对本发明的改进，所述延伸狭缝是直面狭缝。
作为对本发明的改进，所述延伸狭缝是弧面狭缝。
作为对本发明的改进，所述直面狭缝与水平面之间的夹角α在30度至90度之间选择。
作为对本发明的改进，在远离出料口的一侧的涂布唇上设有接触部。
作为对本发明的改进，所述接触部的底面是平面或弧面。
本发明由于采用了涂布头的涂布狭缝分为依次相连接的两截，第一截涂布狭缝为直面狭缝，直面狭缝的下端为出料口；第二截涂布狭缝为弧面狭缝，在弧面狭缝上设有与狭缝相通的料槽的结构，所以，本发明具有可以防止涂布时拖尾，且适合于垂直向下或者斜着向下涂布的优点。
附图说明
图1是现有的挤压式涂布头的实施例的结构示意图；
图2是本发明的挤压式涂布头的第一种实施例的结构示意图；
图3是本发明的挤压式涂布头的第二种实施例的结构示意图；
图4是本发明的挤压式涂布头的第三种实施例的结构示意图；
图5是本发明的挤压式涂布头的第四种实施例的结构示意图。
具体实施方式
下面结合具体附图对本发明作进一步说明。
请参见图2，图2揭示的是本发明的一种弯道式涂压涂布头的第一实施例，包括第一涂布唇1和第二涂布唇2，在所述第一涂布唇1和第二涂布唇2之间设有垫片，所述垫片将所述第一涂布唇1和第二涂布唇2隔开形成涂布狭缝3，所述涂布狭缝3分为依次相连接的两截，第一截涂布狭缝31为直面狭缝，直面狭缝的下端为出料口311；第二截涂布狭缝32为弧面狭缝，在弧面狭缝上设有与狭缝相通的料槽33；料槽33容积的大小，要具备当涂布机暂停涂布时，能浆料暂存在料槽33内，而不顺着涂布狭缝下流，基本不对涂布狭缝内的浆料产生压力。本实施例中，所述料槽33设置在所述弧面狭缝的高点处。
本发明由于采用了涂布头的涂布狭缝分为依次相连接的两截，第一截涂布狭缝31为直面狭缝，直面狭缝的下端为出料口311；第二截涂布狭缝32为弧面狭缝，在弧面狭缝上设有与狭缝相通的料槽33的结构，所以，本发明具有可以防止涂布时拖尾，且适合于垂直向下或者斜着向下涂布的优点。
优选的，在所述弧面狭缝的远离直面狭缝一侧设向上翘起的延伸狭缝34，作为排出浆料中的气泡的作用。本实施例中，所述延伸狭缝34可以是直面狭缝（未画图）；也可以是弧面狭缝（如本图所示）。
请参见图3，图3揭示的是本发明的一种弯道式涂压涂布头的第二实施例，包括第一涂布唇1和第二涂布唇2，在所述第一涂布唇1和第二涂布唇2之间设有垫片，所述垫片将所述第一涂布唇1和第二涂布唇2隔开形成涂布狭缝3，所述涂布狭缝3分为依次相连接的两截，第一截涂布狭缝31为直面狭缝，直面狭缝的下端为出料口311；第二截涂布狭缝32为弧面狭缝，在弧面狭缝上设有与狭缝相通的料槽33；料槽33容积的大小，要具备当涂布机暂停涂布时，能浆料暂存在料槽33内，而不顺着涂布狭缝下流，基本不对涂布狭缝内的浆料产生压力。本实施例中，所述料槽33设置在所述弧面狭缝的高点处。本实施例中，所述直面狭缝与水平面4之间的夹角α可在30度至90度之间选择；直面狭缝斜着布置时，有利于在特别空间内布置挤压式涂布头。
本发明由于采用了涂布头的涂布狭缝分为依次相连接的两截，第一截涂布狭缝31为直面狭缝，直面狭缝的下端为出料口311；第二截涂布狭缝32为弧面狭缝，在弧面狭缝上设有与狭缝相通的料槽33的结构，所以，本发明具有可以防止涂布时拖尾，且适合于垂直向下或者斜着向下涂布的优点。
请参见图4，图4揭示的是本发明的一种弯道式涂压涂布头的第三实施例，包括第一涂布唇1和第二涂布唇2，在所述第一涂布唇1和第二涂布唇2之间设有垫片，所述垫片将所述第一涂布唇1和第二涂布唇2隔开形成涂布狭缝3，所述涂布狭缝3分为依次相连接的两截，第一截涂布狭缝31为直面狭缝，直面狭缝的下端为出料口311；第二截涂布狭缝32为弧面狭缝，在弧面狭缝上设有与狭缝相通的料槽33；料槽33容积的大小，要具备当涂布机暂停涂布时，能浆料暂存在料槽33内，而不顺着涂布狭缝下流，基本不对涂布狭缝内的浆料产生压力。本实施例中，所述料槽33设置在所述弧面狭缝的高点处。本实施例中，在远离出料口4的一侧的涂布唇上设有接触部11，且所述接触部11的底面111是弧面结构，这种设计，当本实施例垂直向下或斜向向下向基材上涂布时，接触部11的底面111抵在基材的前进方向的前面部位，可以起到背辊稳定基材不产生抖动的作用，同时，涂布头的浆料出口311悬在基材上方，并且浆料流出311涂布时呈自由状态流出（即不受传统的接触式涂布唇的延长部的任何影响），与非接触式的涂布效果一样，这样，就达到用接触式涂布的方式，达到非接触式的涂布效果的目的（现有技术中，非接触式的涂布效果要好于接触式的涂布效果）。
请参见图5，图5揭示的是本发明的一种弯道式涂压涂布头的第四实施例，图5所示实施例与图4所示实施例其大体结构相同，所不同的是所述接触部11的底面111是平面。
本领域的技术人员容易理解，以上所述仅为本发明的较佳实施例而已，并不用以限制本发明，凡在本发明的精神和原则之内所作的任何修改、等同替换和改进等，均应包含在本发明的保护范围之内。
Claims (1)
1、
一种弯道式涂压涂布头，包括第一涂布唇（1）和第二涂布唇（2），在所述第一涂布唇（1）和第二涂布唇（2）之间设有垫片，所述垫片将所述第一涂布唇（1）和第二涂布唇（2）隔开形成涂布狭缝（3），其特征在于：所述涂布狭缝（3）分为依次相连接的两截，第一截涂布狭缝（31）为直面狭缝，直面狭缝的下端为出料口（311）；第二截涂布狭缝（32）为弧面狭缝，在弧面狭缝上设有与狭缝相通的料槽（33）。
2、
根据权利要求1所述的弯道式涂压涂布头，其特征在于：所述料槽（33）设置在所述弧面狭缝的高点处。
3、
根据权利要求1或2所述的弯道式涂压涂布头，其特征在于：在所述弧面狭缝的远离直面狭缝一侧设向上翘起的延伸狭缝（34）。
4、 根据权利要求3所述的弯道式涂压涂布头，其特征在于：所述延伸狭缝（34）是直面狭缝。
5、 根据权利要求3所述的弯道式涂压涂布头，其特征在于：所述延伸狭缝（34）是弧面狭缝。
6、
根据权利要求1或2所述的弯道式涂压涂布头，其特征在于：所述直面狭缝与水平面之间的夹角（α）在30度至90度之间选择。
7、
根据权利要求3所述的弯道式涂压涂布头，其特征在于：所述直面狭缝与水平面之间的夹角（α）在30度至90度之间选择。
8、
根据权利要求4或5所述的弯道式涂压涂布头，其特征在于：所述直面狭缝与水平面之间的夹角（α）在30度至90度之间选择。
9、
根据权利要求1或2所述的弯道式涂压涂布头，其特征在于：在远离出料口（4）的一侧的涂布唇上设有接触部（11）。
10、
根据权利要求9所述的弯道式涂压涂布头，其特征在于：所述接触部（11）的底面（111）是平面或弧面。
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2003126761A (ja) * | 2001-10-29 | 2003-05-07 | Konica Corp | 塗布方法 |
| CN2749586Y (zh) * | 2004-11-05 | 2006-01-04 | 鸿富锦精密工业（深圳）有限公司 | 多层涂布设备 |
| JP2011143388A (ja) * | 2010-01-18 | 2011-07-28 | Clean Technology Kk | 薄膜塗工装置並びに両面薄膜塗工装置 |
| CN104148238A (zh) * | 2014-08-02 | 2014-11-19 | 深圳市信宇人科技有限公司 | 挤压涂布头及其涂布机 |
| CN105921360A (zh) * | 2016-07-01 | 2016-09-07 | 深圳市华星光电技术有限公司 | 狭缝喷嘴和涂布装置 |
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| JP5587531B2 (ja) * | 2007-07-19 | 2014-09-10 | ノードソン コーポレーション | スロットノズル組立体、スロットコートガン、及び幅広の帯状に発泡性溶融体を押し出す方法 |
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2003126761A (ja) * | 2001-10-29 | 2003-05-07 | Konica Corp | 塗布方法 |
| CN2749586Y (zh) * | 2004-11-05 | 2006-01-04 | 鸿富锦精密工业（深圳）有限公司 | 多层涂布设备 |
| JP2011143388A (ja) * | 2010-01-18 | 2011-07-28 | Clean Technology Kk | 薄膜塗工装置並びに両面薄膜塗工装置 |
| CN104148238A (zh) * | 2014-08-02 | 2014-11-19 | 深圳市信宇人科技有限公司 | 挤压涂布头及其涂布机 |
| CN105921360A (zh) * | 2016-07-01 | 2016-09-07 | 深圳市华星光电技术有限公司 | 狭缝喷嘴和涂布装置 |
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