WO2017197922A1 - 网版印刷方法及压印装置 - Google Patents

网版印刷方法及压印装置 Download PDF

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Publication number
WO2017197922A1
WO2017197922A1 PCT/CN2017/072247 CN2017072247W WO2017197922A1 WO 2017197922 A1 WO2017197922 A1 WO 2017197922A1 CN 2017072247 W CN2017072247 W CN 2017072247W WO 2017197922 A1 WO2017197922 A1 WO 2017197922A1
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WO
WIPO (PCT)
Prior art keywords
printing
blade
screen
pressure
pressure value
Prior art date
Application number
PCT/CN2017/072247
Other languages
English (en)
French (fr)
Inventor
阮士薪
崔富毅
白雪飞
李发顺
谷春生
李旭伟
Original Assignee
京东方科技集团股份有限公司
鄂尔多斯市源盛光电有限责任公司
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by 京东方科技集团股份有限公司, 鄂尔多斯市源盛光电有限责任公司 filed Critical 京东方科技集团股份有限公司
Priority to US15/537,939 priority Critical patent/US10882304B2/en
Priority to EP17728997.2A priority patent/EP3263351B1/en
Publication of WO2017197922A1 publication Critical patent/WO2017197922A1/zh

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    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B41—PRINTING; LINING MACHINES; TYPEWRITERS; STAMPS
    • B41F—PRINTING MACHINES OR PRESSES
    • B41F15/00—Screen printers
    • B41F15/08—Machines
    • B41F15/0804—Machines for printing sheets
    • B41F15/0813—Machines for printing sheets with flat screens
    • B41F15/0818—Machines for printing sheets with flat screens with a stationary screen and a moving squeegee
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B41—PRINTING; LINING MACHINES; TYPEWRITERS; STAMPS
    • B41M—PRINTING, DUPLICATING, MARKING, OR COPYING PROCESSES; COLOUR PRINTING
    • B41M1/00—Inking and printing with a printer's forme
    • B41M1/12—Stencil printing; Silk-screen printing
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B41—PRINTING; LINING MACHINES; TYPEWRITERS; STAMPS
    • B41F—PRINTING MACHINES OR PRESSES
    • B41F15/00—Screen printers
    • B41F15/14—Details
    • B41F15/34—Screens, Frames; Holders therefor
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B41—PRINTING; LINING MACHINES; TYPEWRITERS; STAMPS
    • B41F—PRINTING MACHINES OR PRESSES
    • B41F15/00—Screen printers
    • B41F15/08—Machines
    • B41F15/0881—Machines for printing on polyhedral articles
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B41—PRINTING; LINING MACHINES; TYPEWRITERS; STAMPS
    • B41F—PRINTING MACHINES OR PRESSES
    • B41F15/00—Screen printers
    • B41F15/14—Details
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B41—PRINTING; LINING MACHINES; TYPEWRITERS; STAMPS
    • B41F—PRINTING MACHINES OR PRESSES
    • B41F15/00—Screen printers
    • B41F15/14—Details
    • B41F15/44—Squeegees or doctors
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B41—PRINTING; LINING MACHINES; TYPEWRITERS; STAMPS
    • B41F—PRINTING MACHINES OR PRESSES
    • B41F15/00—Screen printers
    • B41F15/14—Details
    • B41F15/44—Squeegees or doctors
    • B41F15/46—Squeegees or doctors with two or more operative parts
    • H—ELECTRICITY
    • H05—ELECTRIC TECHNIQUES NOT OTHERWISE PROVIDED FOR
    • H05K—PRINTED CIRCUITS; CASINGS OR CONSTRUCTIONAL DETAILS OF ELECTRIC APPARATUS; MANUFACTURE OF ASSEMBLAGES OF ELECTRICAL COMPONENTS
    • H05K3/00—Apparatus or processes for manufacturing printed circuits
    • H05K3/10—Apparatus or processes for manufacturing printed circuits in which conductive material is applied to the insulating support in such a manner as to form the desired conductive pattern
    • H05K3/12—Apparatus or processes for manufacturing printed circuits in which conductive material is applied to the insulating support in such a manner as to form the desired conductive pattern using thick film techniques, e.g. printing techniques to apply the conductive material or similar techniques for applying conductive paste or ink patterns
    • H05K3/1216—Apparatus or processes for manufacturing printed circuits in which conductive material is applied to the insulating support in such a manner as to form the desired conductive pattern using thick film techniques, e.g. printing techniques to apply the conductive material or similar techniques for applying conductive paste or ink patterns by screen printing or stencil printing
    • H05K3/1233—Methods or means for supplying the conductive material and for forcing it through the screen or stencil

Definitions

  • the present disclosure relates to the field of screen printing technology, and in particular to a screen printing method and an imprint apparatus.
  • OLED screen organic light emitting diode
  • a substrate backplane glass
  • screen printing is used to form a desired printed pattern in the process of forming a mask layer.
  • the present disclosure provides a screen printing method including the following steps:
  • the printing blade mechanism has a printing blade, a pressure sensing feedback system
  • the pressure sensing feedback system detects and feeds back the pressure value between the printing blade and the printing screen
  • the printing blade is placed along the plane of the printing screen by the blade driving device Moving in a vertical first direction changes the pressure between the printing blade and the printing screen.
  • the printing blade is moved by the blade driving device in a second direction parallel to the longitudinal direction of the printing machine beam to further change the pressure between the printing blade and the printing screen.
  • the printing blade mechanism is movably mounted on the cross member of the printing press, and at least two of the printing blade mechanisms are attached together such that at least two of the printing blades form an integral blade.
  • the present disclosure also provides an imprint apparatus comprising a printer cross member, an equipment machine, a control device, and at least one printing scraper mechanism, wherein the print scraper mechanism is movably mounted on a printer cross member with a printing blade and pressure
  • An inductive feedback system wherein the pressure sensing feedback system is configured to feed back a pressure value between the printing blade and a printing screen during a printing process; the control device is configured to compare the feedback pressure value with a predetermined pressure value If the difference between the two is greater than a predetermined threshold, the pressure between the printing blade and the printing screen is changed.
  • the printing blade mechanism further has a blade driving device for causing the printing blade to move in a first direction perpendicular to a plane of the printing screen, changing between the printing blade and the printing screen pressure.
  • the blade driving device is configured to move the printing blade in a second direction parallel to the longitudinal direction of the printing machine cross beam to further change the pressure between the printing blade and the printing screen.
  • control device is further configured to reduce the pressure between the printing blade and the screen when the printing blade passes through the non-printing area on the substrate.
  • the printing blade mechanism is movably mounted on the cross member of the printing press, and at least two of the printing blade mechanisms are attached together such that at least two of the printing blades form an integral blade.
  • the final printing precision can be improved according to the pressure sensing feedback system, and the alignment of the effective illumination area is corresponding after the subsequent bonding is completed.
  • the accuracy is improved, and subsequent laser sintering and cutting also increase the yield due to the reduction in offset.
  • FIG. 1 is a perspective view of an imprint apparatus provided by an embodiment of the present disclosure
  • FIG. 2 is a longitudinal schematic view of a doctor mechanism of an imprint apparatus provided by an embodiment of the present disclosure.
  • the terms “upper”, “lower”, “left”, “right”, “vertical”, “horizontal”, “top”, “bottom” and The derivative should refer to the public text.
  • the terms “overlay”, “on top of”, “positioned on” or “positioned on top of” mean that a first element, such as a first structure, exists in a second element, such as a second structure. Above, wherein an intermediate element such as an interface structure may exist between the first element and the second element.
  • the term “contacting” means connecting a first element such as a first structure and a second element such as a second structure, with or without other elements at the interface of the two elements.
  • the middle portion of the printed metal screen is deformed due to the action of gravity, and the deformation is closer to the intermediate portion. Big.
  • the straight edge printing blade of the related art the force at the deformation of the middle portion of the printing metal screen and the force of the two side printing blades on the printing metal screen are different, and the pressure in the middle of the printing process may result in the presence of pressure.
  • the deformed screen is deformed toward the end position by the action of the doctor blade.
  • the gravity deformation generated by the printing screen is stretched in the end direction by the blade pressure, and as a result, the offset of the printing effect at the start of the printing and the end region is excessive.
  • the alignment accuracy of the corresponding effective light-emitting area is reduced after the subsequent bonding is completed. If the printing offset is too large, the subsequent laser sintering effect is lowered, and the process requirements cannot be satisfied. Moreover, the mainstream narrow frame products on the market have high requirements on the offset accuracy of the printing effect, and the increase in the offset amount leads to a decrease in the success rate of the narrow frame product.
  • 1 is a perspective schematic view of an imprint apparatus in accordance with an exemplary embodiment of the present disclosure.
  • 1 is the printing machine beam
  • 2 is the scraper mechanism with pressure induction feedback system
  • 3 is several screens on the substrate
  • 4 is the substrate
  • 5 is the gap between the screens on the substrate 3
  • 6 is the printing screen
  • 8 is a control device (not shown).
  • the substrate 4 (backplane glass) is placed on the equipment table 7, and then the printing screen 6 is placed over the substrate 4, leaving a certain gap between the printing screen 6 and the substrate 4.
  • the printing material is coated on the screen of the screen, and the doctor mechanism 2 presses the printing blade against the mesh of the printing screen 6 at a predetermined pressure value, and moves the blade to emboss the desired printing pattern on the substrate 4.
  • the control device 8 is located on the imprinting device. Those skilled in the art will appreciate that the control device 8 is connected to the imprinting device in a wired or wireless manner.
  • a plurality of screens 3 may be partitioned on the substrate 4. As shown in FIG. 1, the number of screens 3 per line on the substrate 4 is five. However, the above numbers are merely illustrative, and those skilled in the art will understand that the number of screens 3 per line on the substrate may be more or less.
  • the number of scrapers 2 with a pressure-sensing feedback system on the crosshead 1 of the printing press is greater than the X-axis direction on the substrate The number of screens per line is 3 to ensure that the scraper is used as a spare part.
  • the printer beam 1 is moved in the Y-axis direction, and each of the blade mechanisms 2 respectively causes the blade to act on the corresponding screen 3 with a predetermined pressure, thereby completing the embossing work in batches.
  • the printing screen 6 is generally made of metal. After being placed on the substrate 4, the printing screen 6 is deformed by its own gravity, and is deformed in the X-axis Y-axis direction, and the deformation is closer to the intermediate portion. In this case, if all the blade mechanisms 2 are pressed against the same force of the printing screen 6, in the region where the deformation is large, the pressure actually applied to the printing screen by the printing blade is larger than the predetermined pressure. The deviation causes a shift in the printed pattern.
  • the pressure sensing feedback system feeds back the actual pressure value P between the blade and the printing screen 6 to the control device 8 according to a predetermined time during the printing process.
  • the control device 8 compares the actual pressure value P with a predetermined pressure value P0. If the difference between the two is greater than the predetermined threshold value T, the pressure value output by the scraper mechanism 2 where the printing blade is located is adjusted to cause the scraper The actual pressure value P between the printing screen 6 is closer to the predetermined pressure value P0.
  • the predetermined pressure value P0 and the threshold T can be set according to specific processing requirements.
  • the position of the printing blade relative to the printing screen can be changed according to the pressure sensing feedback data during the printing process, thereby more satisfying the predetermined pressure parameters input by the device at different positions of the printing screen, and correcting the printing metal screen due to gravity The deformation caused by the action, thereby reducing the offset of the finished product after printing.
  • each of the plurality of printing blades applies a force to one screen 3, respectively.
  • a plurality of doctor mechanisms 2 are movably mounted on the printer cross member 1.
  • the width of the screen 3 is greater than the width of a single printing blade
  • a plurality of printing blades can be combined to form one or several integrated blades, wherein the width of each integrated blade is greater than the width of the single screen 3, thereby allowing the printing blade to pass Screen 3 acts on all areas to be printed to form the desired printed pattern.
  • all of the printing blade mechanisms 2 on the printing press beam 1 can be combined to form a conventional linear integrated blade.
  • the printing blade can be formed into a corresponding number and width of the integral blade according to the number, width, and the like of the object to be processed.
  • the present disclosure The combinable split scraper provided by the present invention has a wider range of applications, and the printed product has a more accurate effect and a higher yield.
  • FIG. 2 is a schematic longitudinal view of an imprint apparatus scraper mechanism 201 provided by an embodiment of the present disclosure.
  • 1 is a printing machine beam
  • 2 is a doctor blade mechanism
  • 201 is a doctor blade
  • 202 is a pressure sensing feedback system
  • 203 is a blade driving device.
  • the control device 8 can move the scraper mechanism 2 on the printing machine cross member 1 in the X-axis direction as shown in FIG. 1, and can make the scraping blade perform the Z-axis direction as shown in FIG. 1 according to the pressure-sensing feedback data (with the printing screen).
  • the plane in which it is located moves vertically.
  • a predetermined pressure value is input to the control device according to the process requirements. The closer the force between the printing blade and the printing screen is to the predetermined pressure value, the better the effect of printing the finished product.
  • a predetermined threshold is also input to the control device 8. When the difference between the actual pressure data fed back by the pressure sensing feedback system 202 and the predetermined pressure value is less than a predetermined threshold, then the deviation/error of the printed product is within an acceptable range, and it is not necessary to move the printing blade.
  • the material to be printed is spread by the equipment scraper to cover the effective printing area of the printing screen to complete the spreading of the printing material.
  • the spacing between the respective doctor mechanisms 2 is adjusted in accordance with the spacing between the plurality of screens 3 on the substrate, so that the doctor blades 201 of the respective doctor mechanisms 2 are aligned with the respective screens 3 to be imprinted.
  • the width of the blade 201 is not less than the width of the screen 3 in the X-axis direction, so that the screen 3 can sufficiently receive the force of the blade 201.
  • the control device 8 presses the printing blade 201 of the blade mechanism 2 against the printing screen 6 at a predetermined pressure P0 according to the input predetermined pressure value, thereby generating pressure on the mesh on the printing screen 6.
  • the pressure sensing feedback system 202 feeds back the actual pressure value between the doctor blade 201 and the printing screen 6 to the control device 8 every predetermined time during the printing process.
  • the control device 8 compares the actual pressure value P with a predetermined pressure value P0, and if the difference T between the two is not greater than the predetermined threshold value T0, the printing operation is continued. If the difference T between the two is greater than the predetermined threshold value T0, the pressure value is adjusted so that the actual pressure value P between the doctor blade 201 and the printing screen 6 is closer to the predetermined pressure value P0.
  • the doctor blade 201 is moved on the Z-axis and/or the X-axis by the blade driving device 203 on the doctor mechanism 2, thereby changing the actual pressure value P.
  • the control device 8 issues a control signal to the blade driving device 203.
  • the blade driving device 203 moves the blade 201 upward in the Z-axis direction, thereby reducing the actual pressure value P.
  • the control device 8 can lower the actual pressure value of the scraper 201 against the printing screen 6, so that the scraper 201 does not exert pressure on the gap 5, so that The tensile deformation of the printing screen 6 caused by the previous spreading operation by pressure. Thereafter, when the blade mechanism 2 passes the next screen 3, the control device 8 increases the pressure data input to the blade mechanism 2, and continues the blade mechanism 2 to continue the printing operation. The above operation can be repeated to complete the printing operation of the entire substrate 4.
  • the gap 5 between the respective screens 3 of the printing screen 6 is not an effective printing area. That is, when the printing blade mechanism 2 passes through the respective gaps 5, the actual printing operation is not performed, and this causes the printing screen 6 to be further deformed.
  • the control device 8 reduces the printing pressure output from the printing blade mechanism 2.
  • performing the screen printing using the imprint apparatus of the present disclosure includes the following steps:
  • the control device 8 inputs a predetermined pressure parameter and a predetermined threshold value, wherein in the case of a deformation which is not produced by the printing screen 6, the printing blade 201 uniformly acts on the area to be printed on the printing screen 6 at a predetermined pressure value P0. , for example, screen 3, the predetermined pressure value corresponds to the input pressure parameter;
  • the material to be printed is covered with a doctor blade to cover the effective printing area of the printing screen 6;
  • the printing blade 201 on the printing blade mechanism 2 is pressed against the printing at a predetermined pressure value P On the printing area of screen 6, such as screen 3;
  • the control device 8 compares the actual pressure value P fed back by the pressure sensing feedback system 202 with a predetermined pressure value P0;
  • the difference T between the two is greater than the predetermined threshold T0, it is considered that the deformation of the partial region of the printing screen being measured exceeds the acceptable range, and the application of the printing blade 2 is changed according to the actual pressure value P fed back.
  • control device 8 reduces the pressure value T outputted by the printing blade mechanism 2, and reduces the further deformation caused by the pressure on the printing screen 6;
  • the printing screen 6 is removed to form a printed pattern on the substrate 4.
  • the X-axis direction error caused by the deformation of the printing screen 6 due to gravity can be corrected, and the pressure applied by the printing blade 201 to the printing screen 6 is made closer.
  • the pressure parameters input by the equipment enable the printing screen 6 to have substantially the same force in each part of the process.
  • the pressure sensing feedback system 202 can also be adjusted during the printing operation in the Y-axis direction such that the pressure at each location of the printing screen 6 is closer to the input predetermined pressure value.
  • the printing blade according to the present disclosure can reduce the offset of the finished product after printing, and ensure the accuracy of the subsequent alignment product, and then the laser sintering process. Reducing the poor sintering due to the offset can further reduce the difficulty of cutting, even if the subsequent production of the narrow bezel product can improve the yield in the above process.

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  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Screen Printers (AREA)

Abstract

一种网版印刷方法，包括：提供至少一个印刷刮刀机构（2），该印刷刮刀机构（2）具有印刷刮刀（201）和压力感应反馈系统（202），将至少一个网版（6）放置在基板（4）上方，在印刷过程中，压力感应反馈系统（202）检测并反馈印刷刮刀（201）与印刷网版（6）之间的压力值，比较反馈的压力值和预定的压力值，如果两者之间的差值大于预定的阈值，则改变印刷刮刀（201）与印刷网版（6）之间的压力。还公开了一种实现该网版印刷方法的压印装置。该网版印刷方法及压印装置能够减少由印刷网版变形引起的印刷图案不良率。

Description

网版印刷方法及压印装置
相关申请的交叉引用
本申请要求于2016年05月18日递交的中国专利申请第201610331756.3号的优先权，在此全文引用上述中国专利申请公开文本的内容以作为本申请的一部分。
技术领域
本公开文本涉及网版印刷技术领域，特别是涉及一种网版印刷方法及压印装置。
背景技术
在OLED屏幕(有机发光二极管)的生产过程中，需要在基板(背板玻璃)上涂布多层材料，其中在形成掩膜层的过程中，使用网版压印形成所需要的印刷图案。
发明内容
本公开文本的目的是提供一种网版印刷方法及压印装置，能够减少由印刷网版变形引起的印刷图案不良率。
为了解决上述技术问题，本公开文本提供一种网版印刷方法，包括以下步骤：
提供至少一个印刷刮刀机构，其中所述印刷刮刀机构具有印刷刮刀、压力感应反馈系统；
将至少一个网版放置在基板上方；
在印刷过程中，压力感应反馈系统检测并反馈所述印刷刮刀与所述印刷网版之间的压力值；
比较所述反馈的压力值和预定的压力值，如果两者之间的差值大于预定的阈值，则改变所述印刷刮刀与所述印刷网版之间的压力。
其中，通过刮刀驱动装置使所述印刷刮刀沿与所述印刷网版所在平面 垂直的第一方向移动，改变所述印刷刮刀与所述印刷网版之间的压力。
其中，通过所述刮刀驱动装置使所述印刷刮刀在与所述印刷机横梁的长度方向平行的第二方向上移动，进一步改变所述印刷刮刀与所述印刷网版之间的压力。
其中，当所述印刷刮刀经过基板上的非印刷区域时，减少所述印刷刮刀与所述网版之间的压力。
其中，所述印刷刮刀机构可移动地安装在印刷机横梁上，至少两个所述印刷刮刀机构贴合在一起，从而使至少两个所述印刷刮刀形成一体刮刀。
本公开文本还提供一种压印装置，包括印刷机横梁、设备机台、控制装置和至少一个印刷刮刀机构，其中所述印刷刮刀机构可移动地安装在印刷机横梁上，具有印刷刮刀和压力感应反馈系统，其中所述压力感应反馈系统用于在印刷过程中反馈所述印刷刮刀与印刷网版之间的压力值；所述控制装置用于比较所述反馈的压力值和预定的压力值，如果两者之间的差值大于预定的阈值，则改变所述印刷刮刀与所述印刷网版之间的压力。
其中，所述印刷刮刀机构还具有刮刀驱动装置，用于促使所述印刷刮刀沿与所述印刷网版所在平面垂直的第一方向移动，改变所述印刷刮刀与所述印刷网版之间的压力。
其中，所述刮刀驱动装置用于使所述印刷刮刀在与所述印刷机横梁的长度方向平行的第二方向上移动，进一步改变所述印刷刮刀与所述印刷网版之间的压力。
其中，所述控制装置还用于当所述印刷刮刀经过基板上的非印刷区域时，减少所述印刷刮刀与所述网版之间的压力。
其中，所述印刷刮刀机构可移动地安装在印刷机横梁上，至少两个所述印刷刮刀机构贴合在一起，从而使至少两个所述印刷刮刀形成一体刮刀。
采用根据本公开文本的压印方法和压印装置，可以根据压力感应反馈系统可以提高最终印刷精度，在后续贴合完成后对应有效发光区域的对位 精度提高，同时后续激光烧结与切割也会由于偏移量的降低而提高良率。
附图说明
为了更清楚地说明本公开文本的实施例的技术方案，下面将对实施例的附图进行简要说明，应当知道，以下描述的附图仅仅涉及本公开文本的一些实施例，而非对本公开文本的限制，其中：
图1为本公开文本实施例提供的压印装置的立体示意图；
图2为本公开文本实施例提供的压印装置的刮刀机构的纵向示意图。
具体实施方式
为了使本公开文本的实施例的目的、技术方案和优点更加清楚，下面将接合附图，对本公开文本的实施例的技术方案进行清楚、完整的描述。显然，所描述的实施例是本公开文本的一部分实施例，而不是全部的实施例。基于所描述的本公开文本的实施例，本领域技术人员在无需创造性劳动的前提下所获得的所有其他实施例，也都属于本公开文本保护的范围。
当介绍本公开文本的元素及其实施例时，冠词“一”、“一个”、“该”和“所述”旨在表示存在一个或者多个要素。用语“包含”、“包括”、“含有”和“具有”旨在包括性的并且表示可以存在除所列要素之外的另外的要素。
出于下文表面描述的目的，如其在附图中被标定方向那样，术语“上”、“下”、“左”、“右”“垂直”、“水平”、“顶”、“底”及其派生词应涉及公开文本。术语“上覆”、“在……顶上”、“定位在……上”或者“定位在……顶上”意味着诸如第一结构的第一要素存在于诸如第二结构的第二要素上，其中，在第一要素和第二要素之间可存在诸如界面结构的中间要素。术语“接触”意味着连接诸如第一结构的第一要素和诸如第二结构的第二要素，而在两个要素的界面处可以有或者没有其它要素。
在准备印刷作业时，放入的印刷金属网版呈水平放置时，由于重力的作用，该印刷金属网版中间部分产生形变，并且越靠近中间部分的形变越 大。在采用相关技术的直边的印刷刮刀的时候对印刷金属网版中间部分的形变处的作用力和两边印刷刮刀对印刷金属网版的作用力不相同，而且印刷过程中间由于压力的存在会导致变形的网版在刮刀的作用下向结束位置变形。另外，印刷网版产生的重力形变会在刮刀压力作用下被向结束方向拉伸，结果导致印刷后的产品开始以及结束区域的印刷效果偏移量过大。
发生印刷偏移之后，在后续贴合完成后对应有效发光区域的对位精度降低，若是印刷偏移过大，后续激光烧结效果降低，不能满足工艺要求。而且，市场上主流的窄边框产品对印刷的效果偏移精度要求很高，偏移量的增加会导致窄边框产品成功率降低。
下面结合附图，对本公开文本实施例提供的网版印刷方法及压印装置的具体实施方式进行详细地说明。
其中，附图中各个部件的厚度和形状不反映各个部件的真实比例，只为示意说明本公开文本内容。
附图1是根据本公开文本的示例性实施例的压印装置的立体示意图。其中1为印刷机横梁，2为带有压力感应反馈系统的若干个刮刀机构，3为基板上若干个屏幕，4为基板，5为基板上屏幕3之间间隙，6为印刷网版，7为设备机台，8为控制装置(图中未示出)。
首先将基板4(背板玻璃)放置在设备机台7上，然后将印刷网版6放置于基板4上方，印刷网版6和基板4之间留有一定的空隙。在网版的网布上涂布印刷材料，刮刀机构2使印刷刮刀以预定的压力值按压抵持于印刷网版6的网布，并移动刮刀，在基板4上压印出所需要的印刷图案。控制装置8位于压印装置上。本领域技术人员能够理解的是，控制装置8以有线或无线方式连接至压印装置。
为了提高加工效率，基板4上可分区设置多个屏幕3。如图1所示，基板4上每行屏幕3的数量均为5。然而，以上数量仅仅是为了示例说明，本领域技术人员能够理解，基板上每行屏幕3的数量可以更多或更少。印刷机横梁1上带有压力感应反馈系统的刮刀2数量大于基板上X轴方向上 每行屏幕3数量，以保证有刮刀作为备件使用。加工过程中，印刷机横梁1沿Y轴方向移动，每个刮刀机构2分别使刮刀以预定的压力作用于相应的屏幕3上，从而批量地完成压印工作。
印刷网版6一般由金属制成。印刷网版6放置在基板4之上后，在自身重力的作用下产生形变，且在X轴Y轴方向上都有形变，越靠近中间部分形变越大。这种情况下，如果所有刮刀机构2压抵于印刷网版6的作用力相同，在产生较大形变的区域，印刷刮刀实际施加到印刷网版上压力与预定的压力相比会产生较大的偏差，从而导致印刷图案的偏移。
根据本公开文本的实施例，印刷作业开始之后，压力感应反馈系统在进行印刷过程中根据预定的时间，向控制装置8反馈刮刀与印刷网版6之间的实际压力值P。控制装置8将实际压力值P与预定的压力值P0比较，如果两者之间的差值大于预定的阈值T，则对该印刷刮刀所在的刮刀机构2所输出的压力值进行调整，使得刮刀与印刷网版6之间的实际压力值P更加接近预定的压力值P0。其中，预定的压力值P0是和阈值T可以根据具体的加工工艺要求设定。
如此，可以在印刷工艺过程中根据压力感应反馈数据，改变印刷刮刀相对印刷网版的位置，从而在印刷网版的不同位置更加满足设备输入的预定的压力参数，并且补正印刷金属网版由于重力作用而产生的形变，从而降低印刷完成后的成品的偏移量。
根据上述的实施例，多个印刷刮刀中的每一个分别对一个屏幕3施加作用力。本领域技术人员可以理解的是，多个刮刀机构2可移动地安装在印刷机横梁1上。当屏幕3的宽度大于单个印刷刮刀的宽度时，可以将多个印刷刮刀组合在一起形成一个或若干个一体刮刀，其中每个一体化刮刀的宽度大于单个屏幕3的宽度，从而使印刷刮刀经过屏幕3时作用于全部待印刷区域，从而形成想要的印刷图案。而且，可以将印刷机横梁1上的所有印刷刮刀机构2组合在一起，形成传统的直线型一体刮刀。这样，在印刷作业过程中，根据加工对象的数量、宽度等情况，可以使印刷刮刀形成相应数量和宽度的一体刮刀。相对于传统的直线型一体刮刀，本公开文 本提供的可组合式分体刮刀适用的范围更广，印刷成品的效果更精确，良品率更高。
图2为本公开文本实施例提供的压印装置刮刀机构201的纵向示意图。其中1为印刷机横梁，2为刮刀机构，201为刮刀，202为压力感应反馈系统，203为刮刀驱动装置。
控制装置8可以使刮刀机构2在印刷机横梁1上沿如图1所示X轴方向移动，并且可以根据压力感应反馈的数据使刮刀进行如图1所示Z轴方向上(与印刷网版所在的平面垂直的方向)移动。
根据本公开文本的示例性实施例，在印刷作业开始前，需要进行准备工作。根据工艺要求，向控制装置输入预定的压力值。印刷刮刀与印刷网版之间的作用力越接近该预定的压力值，印刷成品的效果越好。可选地，还向控制装置8输入预定的阈值。当压力感应反馈系统202反馈的实际压力数据与预定的压力值之间的差值小于预定的阈值时，则印刷成品的偏差/误差在可接受的范围内，这时没有必要移动印刷刮刀。
准备工作完成后，由设备刮料刀将要印刷的材料铺满印刷网版的有效印刷区域，完成印刷材料的铺刮。然后，根据基板上若干个屏幕3之间的间距，调节各个刮刀机构2之间的间距，使各个刮刀机构2的刮刀201与要压印的各个屏幕3对齐。刮刀201的宽度不小于屏幕3在X轴方向的宽度，这样可以保证屏幕3充分接受到刮刀的201的作用力。
印刷作业开始之后，控制装置8根据输入的预定的压力值，使刮刀机构2的印刷刮刀201以预定的压力P0按压在印刷网版6上，从而对印刷网版6上的网布产生压力，随着印刷机横梁1沿Y轴的运动，在屏幕3上铺刮印刷材料。印刷过程中每经过预定的时间，压力感应反馈系统202向控制装置8反馈刮刀201与印刷网版6之间的实际压力值。控制装置8将实际压力值P与预定的压力值P0比较，如果两者之间的差值T不大于预定的阈值T0，则继续进行印刷作业。如果两者之间的差值T大于预定的阈值T0，则对压力值进行调整，从而使刮刀201与印刷网版6之间的实际压力值P更加接近预定的压力值P0。
根据一个示例性实施例，通过刮刀机构2上的刮刀驱动装置203，使刮刀201在Z轴和/或X轴上移动，从而改变实际压力值P。例如，刮刀201与印刷网版6之间的实际压力值P大于预定的压力值P0时，控制装置8向刮刀驱动装置203发出控制信号。刮刀驱动装置203使刮刀201沿Z轴方向向上移动，从而减少实际压力值P。
当刮刀机构2经过基板4上屏幕3之间的间隙5时，控制装置8可以将刮刀201对印刷网版6的实际压力值进行下调，使刮刀201对间隙5不产生压力作用，这样可以使在之前通过压力进行铺刮动作时对印刷网版6造成的拉伸形变。之后，当刮刀机构2经过下一个屏幕3时，控制装置8提高对刮刀机构2输入的压力数据，继续刮刀机构2继续印刷作业。重复上述动作即可完成整个基板4的印刷作业。
印刷网版6的各个屏幕3之间的间隙5不是有效印刷区域。也就是说，当印刷刮刀机构2经过各个间隙5时，没有进行实际印刷动作，而且这样会使印刷网版6进一步产生形变。根据本示例性实施例，当印刷刮刀机构2经过印刷网版6上的各个间隙5时，控制装置8使印刷刮刀机构2输出的印刷压力减小。这样之前进行印刷作业时对印刷网版6挤压拉伸产生的形变可以得到缓解，从而可以提高最终印刷成品的印刷精度，同时可以延长印刷金属网版的使用寿命。
根据示例性实施例，使用本公开文本的压印装置进行网版印刷时包括以下步骤：
在控制装置8输入预定的压力参数和预定的阈值，其中在印刷网版6不产生的形变的情况下，印刷刮刀201以预定的压力值P0均匀地作用于印刷网版6上待印刷的区域，例如屏幕3，该预定的压力值对应于所输入的压力参数；
沿X轴方向调整刮刀机械2在印刷机横梁1上的位置，使各个印刷刮刀机构2与各个屏幕3对齐；
将要印刷的材料用刮料刀铺满印刷网版6的有效印刷区域；
使印刷刮刀机构2上的印刷刮刀201以一预定的压力值P压抵在印刷 网版6的印刷区域上，如屏幕3；
通过印刷刮刀机构2上的压力感应反馈系统202，测量印刷刮刀2施加于印刷网版6之上的实际压力值；
控制装置8比较压力感应反馈系统202所反馈的实际压力值P与预定的压力值P0；
当两者之间的差值T不大于预定的阈值T0时，认为正在被测量的印刷网版的该部分区域的形变在可接受范围之内，沿Y轴方向移动印刷机横梁1，继续进行印刷作业；
当两者之间的差值T大于预定的阈值T0时，认为正在被测量的印刷网版的该部分区域的形变超过了可接受范围，根据所反馈的实际压力值P，改变印刷刮刀2施加于印刷网版6的实际压力值P，其中通过使印刷刮刀机构2在Z轴方向或Y轴方向上移动，改变印刷刮刀201相对于印刷网版6的位置，从而改变该实际压力值P；
当印刷刮刀机构2经过印刷网版6上的间隙5时，控制装置8使印刷刮刀机构2输出的压力值T减少，减轻压力对印刷网版6造成的进一步形变；
反复进行以上步骤，直至所有待印刷区域印刷完毕；
移走印刷网版6，形成印刷图案于基板4上。
使用根据本公开文本实施例的具有压力感应反馈系统的印刷刮刀机构2，可以修正印刷网版6由于重力产生形变造成的X轴方向误差，使印刷刮刀201向印刷网版6施加的压力更加接近设备输入的压力参数，使印刷网版6在进行工艺过程中各部分的受力基本相同。可选地，在Y轴方向也可以根据压力感应反馈系统202在进行印刷作业过程中进行调节，使得在印刷网版6的每一处所进行的压力都更加接近输入的预定压力值。
根据本公开文本的印刷刮刀与现有技术中使用的直线型印刷刮刀相比，能够降低印刷完成后的成品的偏移量，确保后续对位贴合产品的精度，之后激光烧结过程中也会降低由于偏移导致烧结不良，后续也可以减小切割的困难，即使后续生产窄边框的产品也可以在上述的过程中提高良率。
显然，本领域的技术人员可以对本公开文本进行各种改动和变型而不脱离本公开文本的精神和范围。倘若本公开文本的这些修改和变型属于本公开文本权利要求及其等同技术的范围之内，则本公开文本也意图包含这些改动和变型在内。

Claims (10)

  1. 一种网版印刷方法，包括：
    提供至少一个印刷刮刀机构，其中所述印刷刮刀机构具有印刷刮刀、压力感应反馈系统；
    将至少一个网版放置在基板上方；
    在印刷过程中，压力感应反馈系统检测并反馈所述印刷刮刀与所述印刷网版之间的压力值；
    比较所述反馈的压力值和预定的压力值，如果两者之间的差值大于预定的阈值，则改变所述印刷刮刀与所述印刷网版之间的压力。
  2. 根据权利要求1所述的网版印刷方法，其中，通过刮刀驱动装置使所述印刷刮刀沿与所述印刷网版所在平面垂直的第一方向移动，改变所述印刷刮刀与所述印刷网版之间的压力。
  3. 根据权利要求2所述的网版印刷方法，其中，通过所述刮刀驱动装置使所述印刷刮刀在与所述印刷机横梁的长度方向平行的第二方向上移动，进一步改变所述印刷刮刀与所述印刷网版之间的压力。
  4. 根据权利要求1-3中任一项所述的网版印刷方法，其中，当所述印刷刮刀经过基板上的非印刷区域时，减少所述印刷刮刀与所述网版之间的压力。
  5. 根据权利要求1-3中任一项所述的网版印刷方法，其中，所述印刷刮刀机构可移动地安装在印刷机横梁上，至少两个所述印刷刮刀机构贴合在一起，从而使至少两个所述印刷刮刀形成一体刮刀。
  6. 一种压印装置，包括印刷机横梁、设备机台、控制装置和至少一个印刷刮刀机构，其中所述印刷刮刀机构可移动地安装在印刷机横梁上，具有印刷刮刀和压力感应反馈系统，其中
    所述压力感应反馈系统用于在印刷过程中反馈所述印刷刮刀与印刷网版之间的压力值；
    所述控制装置用于比较所述反馈的压力值和预定的压力值，如果两者之间的差值大于预定的阈值，则改变所述印刷刮刀与所述印刷网版之间的 压力。
  7. 根据权利要求6所述的压印装置，其中所述印刷刮刀机构还具有刮刀驱动装置，用于促使所述印刷刮刀沿与所述印刷网版所在平面垂直的第一方向移动，改变所述印刷刮刀与所述印刷网版之间的压力。
  8. 根据权利要求7所述的压印装置，其中所述刮刀驱动装置用于使所述印刷刮刀在与所述印刷机横梁的长度方向平行的第二方向上移动，进一步改变所述印刷刮刀与所述印刷网版之间的压力。
  9. 根据权利要求6-8中任一项所述的压印装置，其中，所述控制装置还用于当所述印刷刮刀经过基板上的非印刷区域时，减少所述印刷刮刀与所述网版之间的压力。
  10. 根据权利要求6-8中任一项所述的压印装置，其中，所述印刷刮刀机构可移动地安装在印刷机横梁上，至少两个所述印刷刮刀机构贴合在一起，从而使至少两个所述印刷刮刀形成一体刮刀。
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CN106671630B (zh) * 2016-12-29 2019-07-26 深圳正峰印刷有限公司 立体盲文凸点的印刷方法
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