TWI711546B

TWI711546B - Printing method, printing apparatus

Info

Publication number: TWI711546B
Application number: TW108139951A
Authority: TW
Inventors: 村元秀次; 增尾純一; 寺木邦子
Original assignee: 日商斯庫林集團股份有限公司
Priority date: 2017-05-29
Filing date: 2018-05-03
Publication date: 2020-12-01
Also published as: TW201900430A; TW202015924A; JP2018199271A; JP6832241B2; TWI679126B; WO2018221071A1

Abstract

本發明目的在於：不需要不同於UV油墨的材料、可將UV油墨從橡皮布輥2確實轉印於基板B。 The purpose of the present invention is to reliably transfer the UV ink from the blanket roller 2 to the substrate B without requiring materials other than UV ink.

本發明之解決手段係在橡皮布輥2上依序疊置形成第1油墨層L1與第2油墨層L2。又，第1油墨層L1係藉由接受光照射，在第2油墨層L2形成前即預先硬化。藉此，在橡皮布輥2上依序積層著：已硬化的第1油墨層L1、與未接受UV照射而未硬化的第2油墨層L2。然後，藉由使未硬化的第2油墨層L2接觸到基板B，將第1油墨層L1與第2油墨層L2從橡皮布輥2轉印於基板B。依此，不需要不同於UV油墨的材料，即可確實地將UV油墨從橡皮布輥2轉印於基板B。 The solution of the present invention is to form a first ink layer L1 and a second ink layer L2 on the blanket roll 2 in order. In addition, the first ink layer L1 is cured in advance by receiving light irradiation before the second ink layer L2 is formed. Thereby, the first ink layer L1 that has been cured and the second ink layer L2 that has not received UV irradiation and has not been cured are sequentially laminated on the blanket roller 2. Then, by bringing the uncured second ink layer L2 into contact with the substrate B, the first ink layer L1 and the second ink layer L2 are transferred from the blanket roll 2 to the substrate B. Accordingly, it is possible to reliably transfer the UV ink from the blanket roller 2 to the substrate B without requiring a material different from the UV ink.

Description

印刷方法、印刷裝置 Printing method, printing device

本發明係關於將利用噴墨方式朝轉印構件吐出的油墨，由轉印構件轉印於印刷對象，而執行印刷的印刷技術。 The present invention relates to a printing technology that transfers ink discharged to a transfer member by an inkjet method to a printing object by the transfer member, and performs printing.

習知已知有藉由將在橡皮布等轉印構件上所形成的圖像，由橡皮布轉印於印刷對象，而印刷圖像的印刷裝置。又，日本專利特開2010-155430號公報、特開2005-153368號公報及特開2006-130725號公報所記載的印刷裝置，係藉由利用噴墨方式吐出油墨而在轉印構件上形成圖像。 Conventionally, there is known a printing device that prints an image by transferring an image formed on a transfer member such as a blanket to a printing object from the blanket. In addition, the printing devices described in Japanese Patent Laid-Open Nos. 2010-155430, 2005-153368, and 2006-130725 use an inkjet method to eject ink to form a pattern on the transfer member. Like.

依此利用轉印的印刷，重要的是確實執行從轉印構件朝印刷對象的油墨轉印。相對於此，日本專利特開2010-155430號公報揭示有藉由在朝轉印構件上所吐出的油墨上重疊錨釘劑，而實現確實的轉印；日本專利特開2005-153368號公報揭示有藉由預先將高黏度材料塗佈於轉印構件上之後，再將油墨吐出於轉印構件上，而實現確實的轉印。又，日本專利特開2006-130725號公報揭示有藉由利用光照射而提高朝轉印構件吐出的光硬化性油墨黏度，而實現確實的轉印。 According to the printing using transfer, it is important to surely perform the ink transfer from the transfer member to the printing target. On the other hand, Japanese Patent Laid-Open No. 2010-155430 discloses that the anchoring agent is superimposed on the ink discharged on the transfer member to achieve reliable transfer; Japanese Patent Laid-Open No. 2005-153368 discloses Certain transfer can be achieved by applying a high-viscosity material on the transfer member in advance, and then spit out the ink on the transfer member. In addition, Japanese Patent Laid-Open No. 2006-130725 discloses that the viscosity of the photocurable ink discharged to the transfer member is increased by light irradiation, thereby realizing reliable Transfer.

然而，日本專利特開2010-155430號公報中必需另行準備錨釘劑，而日本專利特開2005-153368號公報則必需另行準備黏度經調整的材料。另一方面，日本專利特開2006-130725號公報具有不需要準備該等不同於油墨的材料的優點。但因為利用光照射進行油墨的黏度調整困難，因而有硬化過度進行之油墨會附著於印刷對象上、油墨無法確實轉印於印刷對象的情況。 However, in Japanese Patent Laid-Open No. 2010-155430, an anchoring agent must be separately prepared, while in Japanese Patent Laid-Open No. 2005-153368, a material with adjusted viscosity must be separately prepared. On the other hand, Japanese Patent Laid-Open No. 2006-130725 has the advantage of not requiring preparation of such materials different from ink. However, since it is difficult to adjust the viscosity of the ink by light irradiation, the ink that has been cured excessively may adhere to the printed object, and the ink may not be transferred to the printed object reliably.

本發明係有鑑於上述問題而完成者，目的在於提供：不需要不同於油墨的材料、可將油墨從轉印構件確實轉印於印刷對象。 The present invention was made in view of the above-mentioned problems, and its object is to provide a material that does not require a material other than ink, and the ink can be reliably transferred from a transfer member to a printing object.

本發明的印刷方法，係包括有：第1吐出步驟，係將利用光照射而硬化的光硬化性油墨，藉由噴墨方式朝轉印構件吐出，而在轉印構件上形成第1油墨層；第1光照射步驟，係藉由對第1油墨層照射光而使第1油墨層硬化；第2吐出步驟，係朝在轉印構件上經硬化的第1油墨層，利用噴墨方式吐出光硬化性油墨，形成疊置於第1油墨層上的第2油墨層；與轉印步驟，係藉由使未硬化第2油墨層接觸於印刷對象，將第1油墨層與第2油墨層由轉印構件轉印於印刷對象。 The printing method of the present invention includes: a first discharging step of discharging the photocurable ink cured by light irradiation to the transfer member by an inkjet method to form a first ink layer on the transfer member ; The first light irradiation step is to irradiate the first ink layer with light to harden the first ink layer; the second discharge step is to discharge the first ink layer hardened on the transfer member by inkjet The photocurable ink forms a second ink layer superimposed on the first ink layer; and the transfer step involves contacting the uncured second ink layer with the object to be printed to connect the first ink layer and the second ink layer The transfer member is transferred to the printing object.

本發明的印刷裝置係具備有：轉印構件；油墨吐出部，係將利用光照射而硬化的光硬化性油墨，利用噴墨方式朝轉印構件吐出，藉此在轉印構件上形成第1油墨層，且在第1油墨層上疊置形成第 2油墨層；光照射部，係於第2油墨層形成前，朝轉印構件上所形成的第1油墨層施行光照射，藉此使第1油墨層硬化；與轉印部，係使在硬化後的第1油墨層上所疊置之未硬化第2油墨層接觸於印刷對象，藉此將第1油墨層與第2油墨層從轉印構件轉印於印刷對象。 The printing device of the present invention is provided with: a transfer member; an ink ejection section, which ejects the photocurable ink cured by light irradiation to the transfer member by an inkjet method, thereby forming a first transfer member on the transfer member. Ink layer, and superimposed on the first ink layer to form a 2 Ink layer; The light irradiating part, before forming the second ink layer, irradiates the first ink layer formed on the transfer member with light to harden the first ink layer; and the transfer part, The uncured second ink layer superimposed on the cured first ink layer contacts the printing object, thereby transferring the first ink layer and the second ink layer from the transfer member to the printing object.

依此構成的本發明(印刷方法、印刷裝置)，係在轉印構件上依序疊置形成第1油墨層與第2油墨層。又，第1油墨層係藉由光照射，在第2油墨層形成前即預先硬化。藉此，在轉印構件上，依序積層經硬化的第1油墨、與未硬化的第2油墨。然後，藉由使未硬化的第2油墨接觸於印刷對象，將第1油墨層與第2油墨層從轉印構件轉印於印刷對象。此時，因為第1油墨層已硬化，因而呈現容易從轉印構件剝離的狀態，且因為第2油墨層係未硬化、呈液狀，因而呈現容易附著於印刷對象的狀態。而且，第1油墨層與第2油墨層均利用光硬化性油墨所形成，彼此具有高親和性。所以，第2油墨層係在與第1油墨層相混合之下轉印於印刷對象，而第1油墨層則隨第2油墨層從轉印構件上剝離。依此，不需要不同於油墨的材料，便可確實執行從轉印構件朝印刷對象的油墨轉印。 In the present invention (printing method, printing device) thus constituted, the first ink layer and the second ink layer are sequentially stacked on the transfer member. In addition, the first ink layer is irradiated with light and cured in advance before the second ink layer is formed. Thereby, the hardened first ink and the unhardened second ink are sequentially laminated on the transfer member. Then, by bringing the uncured second ink into contact with the printing object, the first ink layer and the second ink layer are transferred from the transfer member to the printing object. At this time, because the first ink layer is hardened, it is in a state where it is easily peeled off from the transfer member, and because the second ink layer is not hardened and in a liquid state, it is in a state where it is easy to adhere to the printing object. In addition, the first ink layer and the second ink layer are both formed with photocurable ink and have high affinity for each other. Therefore, the second ink layer is transferred to the printing object while being mixed with the first ink layer, and the first ink layer is peeled from the transfer member along with the second ink layer. According to this, a material other than ink is not required, and the ink transfer from the transfer member to the printing object can be performed reliably.

再者，第1光照射步驟亦可依使第1油墨層完全硬化的方式構成印刷方法。藉此，可輕易將第1油墨層從轉印構件上剝離，可確實執行從轉印構件朝印刷對象的油墨轉印。 Furthermore, the first light irradiation step may constitute a printing method in such a way that the first ink layer is completely cured. Thereby, the first ink layer can be easily peeled off from the transfer member, and the ink transfer from the transfer member to the printing target can be performed reliably.

再者，亦可更進一步包括有：藉由朝利用轉印步驟而轉印於印刷對象上的第2油墨層施行光照射，而使第2油墨層完全硬化的第2光照射步驟；而構成印刷方法。藉此，可使油墨確實固定於印刷對象。 Furthermore, it may further include: by using the transfer step to transfer to the printing The second light irradiation step in which the second ink layer on the brush object is irradiated with light to completely harden the second ink layer; constitutes a printing method. Thereby, the ink can be reliably fixed to the printing object.

再者，亦可依相較於在第1吐出步驟中為了形成第1油墨層而吐出光硬化性油墨起、直到於第1光照射步驟中使光硬化性油墨硬化為止的期間，在第2吐出步驟中形成第2油墨層起、直到於轉印步驟中轉印第1油墨層與第2油墨層為止的期間為較長之方式，構成印刷方法。該構成中，因為抑制從為了形成第1油墨層而吐出光硬化性油墨起、直到使該光硬化性油墨硬化為止的期間，故可抑制第1油墨層被轉印構件彈開之情形。又，為了確保從形成第2油墨層起、直到轉印第1油墨層與第2油墨層為止的時間，因而可使第1油墨層與第2油墨層確實相混合，可隨第2油墨層利用印刷對象確實轉印第1油墨層。 Furthermore, it is also possible to compare the period from when the photocurable ink is discharged to form the first ink layer in the first discharge step until the photocurable ink is cured in the first light irradiation step. The period from the formation of the second ink layer in the discharge step to the transfer of the first ink layer and the second ink layer in the transfer step is a longer mode, and constitutes a printing method. In this configuration, the period from when the photocurable ink is discharged for forming the first ink layer until the photocurable ink is hardened is suppressed, so that the first ink layer can be suppressed from being bounced off by the transfer member. In addition, in order to ensure the time from the formation of the second ink layer to the transfer of the first ink layer and the second ink layer, the first ink layer and the second ink layer can be mixed reliably. The first ink layer is reliably transferred by the printing object.

另外，第1油墨層與第2油墨層的組成係可相同、亦可互異。例如第1油墨層與第2油墨層亦可為由同色之光硬化性油墨形成，而構成印刷方法。或者，第1油墨層與第2油墨層中，其中一者為有色的光硬化性油墨，而另一者為透明的光硬化性油墨，亦可構成印刷方法。 In addition, the composition system of the first ink layer and the second ink layer may be the same or different from each other. For example, the first ink layer and the second ink layer may be formed of photocurable inks of the same color to constitute a printing method. Alternatively, one of the first ink layer and the second ink layer is a colored photocurable ink, and the other is a transparent photocurable ink, which may also constitute a printing method.

再者，第1光照射步驟中，亦可利用與轉印構件相對向的光照射器施行光照射，而光照射器係在使第1油墨層硬化後、第2油墨層開始形成前即熄燈，而構成印刷方法。藉此，可抑制第2油墨層在轉印於印刷對象前即因來自光照射器的光而硬化，可更確實地將第2油墨層轉印於印刷對象。 Furthermore, in the first light irradiation step, a light irradiator opposite to the transfer member may be used to perform light irradiation, and the light irradiator turns off the lights after the first ink layer is cured and before the second ink layer starts to form. , And constitute the printing method. This can suppress the second ink layer It is hardened by the light from the light irradiator before being transferred to the printing object, and the second ink layer can be transferred to the printing object more reliably.

再者，轉印構件係朝既定旋轉方向旋轉的輥；第1吐出步驟係利用與轉印構件相對向的噴墨噴頭形成第1油墨層；第2吐出步驟係在隨轉印構件的旋轉而返回至與噴墨噴頭相對向位置的第1油墨層上，利用噴墨噴頭疊置形成第2油墨層，依此亦可構成印刷方法。該構成中，因為第1油墨層與第2油墨層係由同一噴墨噴頭形成，故第1油墨層的形成位置、與第2油墨層的形成位置可輕易疊置。又，因為第1油墨層與第2油墨層的形成係共用同一噴墨噴頭，故可減少零件數量。 Furthermore, the transfer member is a roller that rotates in a predetermined rotation direction; the first discharge step is to form a first ink layer with an inkjet head facing the transfer member; the second discharge step is to follow the rotation of the transfer member Return to the first ink layer at the position opposite to the inkjet nozzle, and use the inkjet nozzle to stack the second ink layer, which can also constitute a printing method. In this configuration, since the first ink layer and the second ink layer are formed by the same inkjet head, the formation position of the first ink layer and the formation position of the second ink layer can be easily overlapped. In addition, since the formation of the first ink layer and the second ink layer share the same inkjet head, the number of parts can be reduced.

再者，轉印構件係朝既定旋轉方向旋轉的輥；第1吐出步驟係利用與轉印構件相對向的第1噴墨噴頭吐出光硬化性油墨；第2吐出步驟係利用較第1噴墨噴頭更靠旋轉方向下游側、且與轉印構件相對向的第2噴墨噴頭，吐出光硬化性油墨，藉此亦可構成印刷方法。該構成中，不需要為了在第1油墨層上疊置第2油墨層而使轉印構件旋轉1周，故可達到產能提升。 Furthermore, the transfer member is a roller that rotates in a predetermined rotation direction; the first discharge step is to use the first inkjet head facing the transfer member to discharge the photocurable ink; the second discharge step is to use the first inkjet The second inkjet head, which is located on the downstream side in the rotation direction and is opposed to the transfer member, discharges the photocurable ink, thereby constituting a printing method. In this configuration, it is not necessary to rotate the transfer member for one rotation in order to stack the second ink layer on the first ink layer, so that the productivity can be improved.

依上述，根據本發明，不需要不同於油墨的材料，即可確實地將油墨從轉印構件上轉印於印刷對象。 As described above, according to the present invention, it is possible to reliably transfer the ink from the transfer member to the printing object without requiring a material other than ink.

1‧‧‧印刷裝置 1‧‧‧Printing device

2‧‧‧橡皮布輥 2‧‧‧Blanket roller

4‧‧‧UV照射器 4‧‧‧UV irradiator

5‧‧‧平台 5‧‧‧Platform

6‧‧‧UV照射器 6‧‧‧UV Irradiator

7‧‧‧遮光構件 7‧‧‧Shading member

9‧‧‧控制器 9‧‧‧Controller

31‧‧‧噴墨噴頭 31‧‧‧Inkjet print head

32‧‧‧噴墨噴頭 32‧‧‧Inkjet print head

B‧‧‧基板 B‧‧‧Substrate

D2‧‧‧旋轉方向 D2‧‧‧Rotation direction

D5‧‧‧搬送方向 D5‧‧‧Conveying direction

F1‧‧‧密接力 F1‧‧‧Close Relay

F2‧‧‧油墨凝聚力 F2‧‧‧Ink cohesion

F3‧‧‧密接力 F3‧‧‧Close Relay

I‧‧‧圖像 I‧‧‧Image

L1‧‧‧第1油墨層 L1‧‧‧The first ink layer

L2‧‧‧第2油墨層 L2‧‧‧The second ink layer

M2‧‧‧橡皮布驅動部 M2‧‧‧Blanket Drive

M5‧‧‧平台驅動部 M5‧‧‧Platform Drive

Pt‧‧‧轉印位置 Pt‧‧‧transfer position

R4‧‧‧UV照射範圍 R4‧‧‧UV irradiation range

R6‧‧‧UV照射範圍 R6‧‧‧UV irradiation range

S1‧‧‧第1驅動信號 S1‧‧‧First drive signal

S2‧‧‧第2驅動信號 S2‧‧‧The second drive signal

圖1係本發明第1實施形態的印刷裝置之機械式構成一例之示意圖。 Figure 1 shows an example of the mechanical configuration of the printing device according to the first embodiment of the present invention intention.

圖2係本發明的印刷裝置之電氣式構成一例之示意圖。 Fig. 2 is a schematic diagram of an example of the electrical configuration of the printing device of the present invention.

圖3係印刷處理一例的流程圖。 Fig. 3 is a flowchart of an example of printing processing.

圖4係依照圖3的印刷處理所執行動作一例的時序圖。 FIG. 4 is a timing chart of an example of operations executed in the printing process of FIG. 3.

圖5係圖3的印刷處理所執行之在橡皮布上的圖像形成順序之示意圖。 FIG. 5 is a schematic diagram of the image forming sequence on the blanket performed by the printing process of FIG. 3. FIG.

圖6係圖3的印刷處理所執行之圖像的轉印順序之示意圖。 FIG. 6 is a schematic diagram of the image transfer sequence performed by the printing process of FIG. 3. FIG.

圖7係本發明第2實施形態的印刷裝置之機械式構成一例之示意圖。 Fig. 7 is a schematic diagram of an example of the mechanical configuration of the printing apparatus according to the second embodiment of the present invention.

圖8係本發明第3實施形態的印刷裝置之機械式構成一例之示意圖。 Fig. 8 is a schematic diagram of an example of the mechanical configuration of the printing apparatus according to the third embodiment of the present invention.

圖9係本發明的具體實驗結果一例之示意圖。 Fig. 9 is a schematic diagram of an example of specific experimental results of the present invention.

圖1所示係本發明第1實施形態的印刷裝置之機械式構成一例之示意圖。圖2所示係本發明的印刷裝置之電氣式構成一例之示意圖。印刷裝置1係藉由將在轉印構件上所形成的圖像，轉印於屬於印刷對象的基板B上，而將圖像印刷於基板B上。另外，圖1中，基板B的形狀係呈平坦，但亦可為彎曲、或具有凹凸。 Fig. 1 is a schematic diagram showing an example of the mechanical configuration of the printing apparatus according to the first embodiment of the present invention. FIG. 2 shows a schematic diagram of an example of the electrical configuration of the printing device of the present invention. The printing device 1 prints the image on the substrate B by transferring the image formed on the transfer member to the substrate B which is a printing target. In addition, in FIG. 1, the shape of the substrate B is flat, but it may be curved or have unevenness.

印刷裝置1係具備有：作為轉印構件的橡皮布輥2、以及驅動橡皮布輥2用的橡皮布驅動部M2。橡皮布輥2係可圍繞其中心軸朝旋轉方向D2進行旋轉，為對光硬化性油墨(後述UV油墨)具撥液性的素材，例如在其外周面上設有聚矽氧製彈性體。橡皮布驅動部 M2係利用例如控伺服馬達使橡皮布輥2朝旋轉方向D2旋轉驅動。 The printing apparatus 1 is provided with a blanket roller 2 as a transfer member, and a blanket drive unit M2 for driving the blanket roller 2. The blanket roller 2 is capable of rotating around its central axis in the rotation direction D2, and is a material that has liquid repellency to photocurable ink (UV ink described later). For example, a silicone elastomer is provided on its outer peripheral surface. Blanket drive The M2 system uses, for example, a servo motor to rotate and drive the blanket roller 2 in the rotation direction D2.

印刷裝置1係具備有與橡皮布輥2的外周面呈相對向的噴墨噴頭31。該噴墨噴頭31係具有平行於橡皮布輥2中心軸排列的複數噴嘴，從各噴嘴朝橡皮布輥2的外周面吐出油墨。尤其噴墨噴頭31係吐出受到UV(ultraviolet)照射而硬化的UV油墨。 The printing device 1 is equipped with an inkjet head 31 facing the outer peripheral surface of the blanket roller 2. The inkjet head 31 has a plurality of nozzles arranged parallel to the central axis of the blanket roller 2, and ejects ink from each nozzle toward the outer peripheral surface of the blanket roller 2. In particular, the inkjet head 31 discharges UV ink hardened by UV (ultraviolet) irradiation.

印刷裝置1係在噴墨噴頭31的旋轉方向D2下游側，具備有相對向於橡皮布輥2外周面的UV照射器4。該UV照射器4可對該UV照射範圍R4照射UV。所以，UV照射器4藉由對通過UV照射範圍R4的橡皮布輥2外周面照射UV，使橡皮布輥2上所附著的UV油墨硬化。如後詳述般，藉由噴墨噴頭31與UV照射器4的互動，在橡皮布輥2的外周面上，形成於已硬化的UV油墨上積層了未硬化UV油墨的圖像。 The printing apparatus 1 is provided with a UV irradiator 4 facing the outer peripheral surface of the blanket roll 2 on the downstream side in the rotation direction D2 of the inkjet head 31. The UV irradiator 4 can irradiate UV to the UV irradiation range R4. Therefore, the UV irradiator 4 irradiates UV to the outer peripheral surface of the blanket roll 2 passing through the UV irradiation range R4 to harden the UV ink attached to the blanket roll 2. As described in detail later, through the interaction of the inkjet head 31 and the UV irradiator 4, an image in which uncured UV ink is laminated on the cured UV ink is formed on the outer peripheral surface of the blanket roller 2.

印刷裝置1係具備有：平台5、以及將平台5朝搬送方向D5驅動的平台驅動部M5，由平台5與平台驅動部M5進行互動，將橡皮布輥2外周面的圖像，在轉印位置Pt處轉印給基板B。即，平台5係保持從外面承接的基板B。另一方面，平台驅動部M5係藉由將平台5朝搬送方向D5驅動，配合隨橡皮布輥2的旋轉而圖像到達轉印位置Pt之情形，將基板B送入至轉印位置Pt。藉此，基板B係在轉印位置Pt處接觸到橡皮布輥2的外周面，而將圖像從橡皮布輥2外周面轉印至基板B的表面。另外，圖1中，搬送方向D5上較轉印位置Pt更靠上游側的待機位置之平台5與基板B係依實線表示，而該等從該待機位置朝搬送方向D5移動中者係依虛線表示。 The printing device 1 is equipped with a platform 5, and a platform drive M5 that drives the platform 5 in the conveying direction D5. The platform 5 interacts with the platform drive M5 to transfer the image on the outer peripheral surface of the blanket roller 2 Transfer to the substrate B at the position Pt. That is, the platform 5 holds the substrate B received from the outside. On the other hand, the table driving unit M5 drives the table 5 in the conveying direction D5 to feed the substrate B to the transfer position Pt in accordance with the situation where the image reaches the transfer position Pt following the rotation of the blanket roller 2. Thereby, the substrate B contacts the outer peripheral surface of the blanket roller 2 at the transfer position Pt, and the image is transferred from the outer peripheral surface of the blanket roller 2 to the surface of the substrate B. In addition, in FIG. 1, the platform 5 and the substrate B at the standby position that is more upstream than the transfer position Pt in the conveying direction D5 The solid line represents, and those moving from the standby position to the conveying direction D5 are represented by broken lines.

印刷裝置1係具備有UV照射器6，該UV照射器6係與於從轉印位置Pt朝搬送方向D5下游側移動的基板B表面相對向。該UV照射器6係可對該UV照射範圍R6照射UV。所以，UV照射器6藉由對通過UV照射範圍R6的基板B表面照射UV，使基板B上所附著的UV油墨完全硬化。藉此，可使圖像固定於基板B上。 The printing apparatus 1 is equipped with a UV irradiator 6 which opposes the surface of the board|substrate B which moves toward the downstream side of the conveyance direction D5 from the transfer position Pt. The UV irradiator 6 can irradiate UV to the UV irradiation range R6. Therefore, the UV irradiator 6 irradiates the surface of the substrate B passing through the UV irradiation range R6 with UV to completely harden the UV ink attached to the substrate B. Thereby, the image can be fixed on the substrate B.

再者，印刷裝置1係具備有控制器9，該控制器9係對橡皮布驅動部M2、噴墨噴頭31、UV照射器4、平台驅動部M5及UV照射器6進行控制。該控制器9係具有CPU(Central Processing Unit，中央處理單元)及RAM(Random Access Memory，隨機存取記憶體)的處理器，執行下述說明的印刷處理。 Furthermore, the printing apparatus 1 is equipped with a controller 9 which controls the blanket drive part M2, the inkjet head 31, the UV irradiator 4, the stage drive M5, and the UV irradiator 6. The controller 9 is a processor having a CPU (Central Processing Unit) and a RAM (Random Access Memory), and executes the printing process described below.

圖3係表示印刷處理一例的流程圖。圖4係表示依照圖3的印刷處理所執行之動作一例的時序圖。圖5係利用圖3的印刷處理所執行之在橡皮布上形成圖像的順序之示意圖。另外，圖5中，將橡皮布輥2的外周面展開為直線狀而表示。 FIG. 3 is a flowchart showing an example of printing processing. FIG. 4 is a timing chart showing an example of operations executed in accordance with the printing process of FIG. 3. FIG. 5 is a schematic diagram of the sequence of forming an image on the blanket performed by the printing process of FIG. 3. FIG. In addition, in FIG. 5, the outer peripheral surface of the blanket roll 2 is expanded linearly and shown.

若開始圖3的印刷處理，橡皮布驅動部M2開始旋轉橡皮布輥2(步驟S101)。接著，在橡皮布輥2的外周面形成第1油墨層L1(步驟S102)。具體而言，由控制器9將第1驅動信號S1傳送給噴墨噴頭31，噴墨噴頭31根據第1驅動信號S1，在時間點t1開始吐出 UV油墨。該第1驅動信號S1係表示構成圖像I的各像點位置、油墨量，噴墨噴頭31根據第1驅動信號S1，朝橡皮布輥2外周面之各像點的對應位置處，吐出既定量的UV油墨液滴。接著，UV照射器4照射UV(步驟S103)。具體而言，在第1油墨層L1到達由UV照射器4所形成之UV照射範圍R4的時間點t2，點亮UV照射器4。 When the printing process of FIG. 3 is started, the blanket drive part M2 starts to rotate the blanket roller 2 (step S101). Next, the first ink layer L1 is formed on the outer peripheral surface of the blanket roller 2 (step S102). Specifically, the controller 9 transmits the first drive signal S1 to the inkjet head 31, and the inkjet head 31 starts to discharge at time t1 according to the first drive signal S1 UV ink. The first drive signal S1 indicates the position of each dot and the amount of ink constituting the image I, and the inkjet head 31 discharges a predetermined value toward the corresponding position of each dot on the outer peripheral surface of the blanket roller 2 according to the first drive signal S1. The amount of UV ink droplets. Next, the UV irradiator 4 irradiates UV (step S103). Specifically, at a time point t2 when the first ink layer L1 reaches the UV irradiation range R4 formed by the UV irradiator 4, the UV irradiator 4 is turned on.

然後，在時間點t3，噴墨噴頭31結束UV油墨的吐出。依此，如圖5中的「形成第1油墨層」欄位所示，由第1驅動信號S1所示複數像點(油墨滴)所構成的第1油墨層L1，形成於橡皮布輥2的外周面。然後，在時間點t4，在確認到第1油墨層L1已通過UV照射範圍R4(步驟S104中「YES」)時，在時間點t5將UV照射器4熄燈(步驟S105)。藉由該UV照射，橡皮布輥2外周面的第1油墨層L1完全硬化。另外，UV照射器4點亮‧熄燈的時序控制，例如可根據橡皮布驅動部M2的編碼器輸出，由控制器9執行。 Then, at time t3, the inkjet head 31 ends the discharge of UV ink. Accordingly, as shown in the "form a first ink layer" column in FIG. 5, a first ink layer L1 composed of a plurality of dots (ink drops) indicated by the first drive signal S1 is formed on the blanket roller 2. The outer periphery. Then, at time t4, when it is confirmed that the first ink layer L1 has passed through the UV irradiation range R4 ("YES" in step S104), the UV irradiator 4 is turned off at time t5 (step S105). By this UV irradiation, the first ink layer L1 on the outer peripheral surface of the blanket roller 2 is completely cured. In addition, the timing control for turning on and off the UV irradiator 4 can be executed by the controller 9 based on the encoder output of the blanket driving unit M2, for example.

接著，在第1油墨層L1上積層形成第2油墨層L2(步驟S106)。具體的而言，由控制器9將第2驅動信號S2傳送給噴墨噴頭31，噴墨噴頭31根據第2驅動信號S2，在時間點t6開始吐出UV油墨。該第2驅動信號S2係表示構成圖像I的各像點位置、油墨量，噴墨噴頭31根據第2驅動信號S2，朝橡皮布輥2外周面的各像點之對應位置處，吐出既定量的UV油墨液滴。此時，開始吐出UV油墨的時間點t6係控制為在第1油墨層L1返回至與噴墨噴頭31相對向位置的時序。然後，吐出疊置於構成第1油墨層L1的複數像點上、且構成第2油墨層L2的複數像點。另外，該時序控制例如可根據橡皮布驅動部M2的編碼器輸出，由控制器9執行。然後，在時間點t7，噴墨噴頭31結束UV油墨吐出。依此，如圖5中的「形成第2油墨層」欄位所示，由第2驅動信號S2所示複數像點(油墨滴)所構成的第2油墨層L2積層於第1油墨層L1上，而形成圖像I。 Next, a second ink layer L2 is laminated on the first ink layer L1 (step S106). Specifically, the controller 9 transmits the second drive signal S2 to the inkjet head 31, and the inkjet head 31 starts to discharge the UV ink at time t6 based on the second drive signal S2. The second drive signal S2 indicates the position of each dot and the amount of ink constituting the image I. The inkjet head 31 discharges a predetermined amount toward the corresponding position of each dot on the outer peripheral surface of the blanket roller 2 according to the second drive signal S2. The amount of UV ink droplets. At this time, the time point t6 at which the discharge of the UV ink is started is controlled to the timing when the first ink layer L1 returns to the position facing the inkjet head 31. Then, eject the complex image superimposed on the first ink layer L1 Dots on and constitutes the complex image dots of the second ink layer L2. In addition, this timing control can be performed by the controller 9 based on the encoder output of the blanket drive part M2, for example. Then, at time t7, the inkjet head 31 ends the discharge of UV ink. Accordingly, as shown in the "form a second ink layer" column in FIG. 5, a second ink layer L2 composed of a plurality of dots (ink drops) indicated by the second drive signal S2 is laminated on the first ink layer L1 , And image I is formed.

在時間點t8，開始將基板B從搬送方向D5上游側朝轉印位置Pt之搬送(步驟S107)。該基板B的搬送係配合橡皮布輥2上的圖像I到達轉印位置Pt之時序進行控制。該時序控制可分別根據橡皮布驅動部M2及平台驅動部M5的編碼器輸出，由控制器9執行。因為依此控制著時序，故橡皮布輥2上的圖像I在時間點t9到達轉印位置Pt，並碰觸到基板B。然後，在圖像I通過轉印位置Pt的時間點t9~t10期間，圖像I由橡皮布輥2被轉印給基板B(步驟S108)。 At time t8, the transfer of the substrate B from the upstream side in the transfer direction D5 to the transfer position Pt is started (step S107). The conveyance of the substrate B is controlled in accordance with the timing at which the image I on the blanket roller 2 reaches the transfer position Pt. The timing control can be executed by the controller 9 according to the encoder output of the blanket driving part M2 and the platform driving part M5, respectively. Because the timing is controlled in this way, the image I on the blanket roller 2 reaches the transfer position Pt at time t9 and touches the substrate B. Then, during the time point t9 to t10 when the image I passes the transfer position Pt, the image I is transferred to the substrate B by the blanket roller 2 (step S108).

在圖像I轉印給基板B時，UV照射器6照射UV(步驟S109)。具體而言，在圖像I到達由UV照射器6所造成之UV照射範圍R6的時間點t11，便點亮UV照射器6。然後，在時間點t12若確認到在圖像I已通過UV照射範圍R6(步驟S110為「YES」)，則在時間點t13將UV照射器6熄燈(步驟S111)。藉由該UV照射，基板B上的圖像I(第1油墨層L1+第2油墨層L2)完全硬化。另外，UV照射器6的亮燈‧熄燈之時序控制，例如可根據平台驅動部M5的編碼器輸出，由控制器9執行。然後，在時間點t14停止基板B搬送(步驟S112)，結束圖3的印刷處理。 When the image I is transferred to the substrate B, the UV irradiator 6 irradiates UV (step S109). Specifically, at a time point t11 when the image I reaches the UV irradiation range R6 caused by the UV irradiator 6, the UV irradiator 6 is turned on. Then, if it is confirmed that the image I has passed through the UV irradiation range R6 at time t12 ("YES" in step S110), the UV irradiator 6 is turned off at time t13 (step S111). By this UV irradiation, the image I (first ink layer L1 + second ink layer L2) on the substrate B is completely cured. In addition, the timing control of turning on and turning off the UV irradiator 6 can be executed by the controller 9 based on the encoder output of the platform driving unit M5, for example. Then, the board B transport is stopped at time t14 (step S112), and the printing process of FIG. 3 is ended.

依如上述所說明的第1實施形態，在橡皮布輥2上依序疊置形成第1油墨層L1與第2油墨層L2。又，第1油墨層L1係藉由接受光照射，而在第2油墨層L2形成前預先硬化。藉此，在橡皮布輥2上，依序積層著：已硬化的第1油墨層L1、以及未接受到UV照射而未硬化的第2油墨層L2。然後，藉由使未硬化的第2油墨層L2接觸到基板B，第1油墨層L1與第2油墨層L2從橡皮布輥2轉印於基板B。此時，因為第1油墨層L1呈硬化，因而呈現容易從橡皮布輥2剝離的狀態，且因為第2油墨層L2呈未硬化的液狀，因而呈現容易附著於基板B的狀態。而且，第1油墨層L1與第2油墨層L2均由UV油墨形成，彼此具有高親和性。所以，第2油墨層L2係在與第1油墨層L1相混合之下，一體性地轉印給基板B，而第1油墨層L1則隨第2油墨層L2從基板B上剝離。依此，不需要與UV油墨不同的材料，便可從橡皮布輥2確實地將UV油墨轉印於基板B。 According to the first embodiment described above, the first ink layer L1 and the second ink layer L2 are sequentially stacked on the blanket roll 2. In addition, the first ink layer L1 is cured in advance by receiving light irradiation before the second ink layer L2 is formed. Thereby, on the blanket roller 2, the first ink layer L1 that has been cured and the second ink layer L2 that has not been cured without receiving UV radiation are laminated in this order. Then, by bringing the uncured second ink layer L2 into contact with the substrate B, the first ink layer L1 and the second ink layer L2 are transferred from the blanket roller 2 to the substrate B. At this time, because the first ink layer L1 is hardened, it appears to be easily peeled off from the blanket roll 2, and because the second ink layer L2 is in an uncured liquid state, it appears to be easy to adhere to the substrate B. Moreover, the first ink layer L1 and the second ink layer L2 are both formed of UV ink and have high affinity for each other. Therefore, the second ink layer L2 is integrally transferred to the substrate B after being mixed with the first ink layer L1, and the first ink layer L1 is peeled from the substrate B along with the second ink layer L2. Accordingly, it is possible to reliably transfer the UV ink to the substrate B from the blanket roller 2 without requiring a material different from the UV ink.

使用圖6，針對此點更進一步詳述。此處，圖6所示係由圖3的印刷處理所執行的圖像轉印順序之示意圖。另外，圖6中，將橡皮布輥2的外周面展開為直線狀表示，且顯示該外周面朝向同圖下方的狀態。圖6中的「硬化前」欄位，係表示在橡皮布輥2外周面上所附著之第1油墨層L1硬化前的狀態。在該階段，因為第1油墨層L1呈液狀，因而第1油墨層L1的溶劑被橡皮布輥2吸收，同時再由第1油墨層L1的表面蒸發。所以，第1油墨層L1的性質係由液狀轉成接近固體狀。 Use Figure 6 to further detail this point. Here, FIG. 6 shows a schematic diagram of the image transfer sequence executed by the printing process of FIG. 3. In addition, in FIG. 6, the outer peripheral surface of the blanket roll 2 is expanded linearly, and it shows the state which faced the downward direction of the same figure. The "before curing" column in FIG. 6 shows the state of the first ink layer L1 attached to the outer peripheral surface of the blanket roll 2 before curing. At this stage, since the first ink layer L1 is in a liquid state, the solvent of the first ink layer L1 is absorbed by the blanket roller 2 and at the same time evaporates from the surface of the first ink layer L1. Therefore, the properties of the first ink layer L1 are changed from liquid to solid.

圖6的「轉印前」欄位中，表示在橡皮布輥2外周面所附著的第1油墨層L1硬化，進而在第1油墨層L1上積層著第2油墨層L2的狀態。在此階段，因為第1油墨層L1硬化呈固體狀，故作用於橡皮布輥2與第1油墨層L1界面處的密接力F1變弱，而提升第1油墨層L1從橡皮布輥2的剝離性。另一方面，因為第1油墨層L1與第2油墨層L2均為UV油墨，彼此的親和性高，因而在第1油墨層L1與第2油墨層L2的界面處該等相混合。所以，在第1油墨層L1與第2油墨層L2的界面處，係作用較密接力F1更強的油墨凝聚力F2(內部結合力)。 The column "before transfer" in FIG. 6 shows a state where the first ink layer L1 adhered to the outer peripheral surface of the blanket roller 2 is cured, and the second ink layer L2 is further laminated on the first ink layer L1. At this stage, because the first ink layer L1 hardens into a solid state, the adhesion force F1 acting on the interface between the blanket roller 2 and the first ink layer L1 becomes weak, and the first ink layer L1 is lifted from the blanket roller 2 Peelability. On the other hand, since the first ink layer L1 and the second ink layer L2 are both UV inks and have a high affinity for each other, the phases are mixed at the interface of the first ink layer L1 and the second ink layer L2. Therefore, at the interface between the first ink layer L1 and the second ink layer L2, an ink cohesive force F2 (internal bonding force) that is stronger than the adhesion force F1 acts.

圖6的「轉印中」欄位係表示在橡皮布輥2外周面所形成的圖像I接觸到基板B的狀態。在此階段，因為接觸到基板B之圖像I的第2油墨層L2呈液狀，因而在基板B與第2油墨層L2的界面處作用較密接力F1更強的密接力F3。另一方面，因為基板B與第2油墨層L2的親和性較弱於第1油墨層L1與第2油墨層L2的親和性，因而基板B與第2油墨層L2間的密接力F3較弱於油墨凝聚力F2。 The "transferring" column in FIG. 6 indicates the state where the image I formed on the outer peripheral surface of the blanket roll 2 is in contact with the substrate B. At this stage, since the second ink layer L2 contacting the image I of the substrate B is in a liquid state, the adhesion force F3 that is stronger than the adhesion force F1 acts on the interface between the substrate B and the second ink layer L2. On the other hand, since the affinity between the substrate B and the second ink layer L2 is weaker than the affinity between the first ink layer L1 and the second ink layer L2, the adhesion force F3 between the substrate B and the second ink layer L2 is weaker For ink cohesion F2.

如此，成立：第1油墨層L1與第2油墨層L2的油墨凝聚力F2>基板B與第2油墨層L2的密接力F3>橡皮布輥2與第1油墨層L1的密接力F1之關係。所以，可在對依密接力F3密接於基板B的第2油墨層L2，使第1油墨層L1依較強的油墨凝聚力F2結合之下，將依較弱密接力F1密接於橡皮布輥2的第1油墨層L1，從該橡皮布輥2剝離。結果，可確實地將由第1油墨層L1與第2油墨層L2構成的圖像I，從橡皮布輥2轉印給基板B。 In this way, the relationship is established: the ink cohesive force F2 of the first ink layer L1 and the second ink layer L2> the adhesive force F3 of the substrate B and the second ink layer L2> the adhesive force F1 of the blanket roller 2 and the first ink layer L1. Therefore, the first ink layer L1 can be bonded to the blanket roller 2 with a weaker adhesion force F1 when the second ink layer L2 is adhered to the substrate B with a strong adhesion force F3. The first ink layer L1, It is peeled off from the blanket roll 2. As a result, the image I composed of the first ink layer L1 and the second ink layer L2 can be reliably transferred from the blanket roller 2 to the substrate B.

再者，在步驟S103中，使第1油墨層L1完全硬化。藉此，第1油墨層L1完全呈固態狀，因而可輕易從橡皮布輥2剝離，可更確實地將UV油墨從橡皮布輥2轉印給基板B。 Furthermore, in step S103, the first ink layer L1 is completely cured. As a result, the first ink layer L1 is completely solid, so it can be easily peeled off from the blanket roller 2 and the UV ink can be transferred from the blanket roller 2 to the substrate B more reliably.

再者，更進一步設置對在步驟S108中被轉印於基板B上的圖像I施行光照射，使未硬化狀態的第2油墨層L2完全硬化的步驟S109。藉此，可使UV油墨確實地固定於基板B。 Furthermore, a step S109 of irradiating the image I transferred on the substrate B in step S108 with light to completely cure the second ink layer L2 in the uncured state is further provided. Thereby, the UV ink can be reliably fixed to the substrate B.

再者，在步驟S102中，開始形成第1油墨層L1，相較於從所形成第1油墨層L1到達UV照射範圍R4起、直到於步驟S103中使第1油墨層L1硬化為止的期間(時間點t1~t2)之下，於步驟S106中形成第2油墨層L2起直到於步驟S108中轉印第1油墨層L1與第2油墨層L2的期間(時間點t6~t9)更長。藉由此構成，因為時間點t1~t2的期間受抑制，使在橡皮布輥2上所附著之第1油墨層L1迅速硬化，故可抑制第1油墨層L1被橡皮布輥2彈開的情形。又，因為確保了時間點t6~t9的期間，因而第1油墨層L1與第2油墨層L2可確實地相混合，可隨第2油墨層L2更確實地將第1油墨層L1轉印給基板B。結果，可將良好圖像I轉印給基板B。 Furthermore, in step S102, the formation of the first ink layer L1 is started, compared to the period from when the formed first ink layer L1 reaches the UV irradiation range R4 until the first ink layer L1 is cured in step S103 ( Below the time point t1~t2), the period from the formation of the second ink layer L2 in step S106 to the transfer of the first ink layer L1 and the second ink layer L2 in step S108 (time point t6~t9) is longer. With this configuration, the period from time t1 to t2 is suppressed, and the first ink layer L1 adhering to the blanket roller 2 is quickly hardened, so that the first ink layer L1 is prevented from being bounced off by the blanket roller 2 situation. In addition, since the period from t6 to t9 is secured, the first ink layer L1 and the second ink layer L2 can be mixed reliably, and the first ink layer L1 can be transferred to the second ink layer L2 more reliably. Substrate B. As a result, a good image I can be transferred to the substrate B.

再者，在使第1油墨層L1經硬化的時間點t4之後、且開始形成第2油墨層L2的時間點t6前之時間點t5，將UV照射器4熄燈 (步驟S105)。藉此，可抑制在轉印給基板B前，即因來自UV照射器4的UV導致第2油墨層L2硬化之情形，可更確實地將第2油墨層L2轉印給基板B。 Furthermore, after the time point t4 when the first ink layer L1 is cured and the time point t5 before the time point t6 when the formation of the second ink layer L2 starts, the UV irradiator 4 is turned off (Step S105). Thereby, it is possible to prevent the second ink layer L2 from being hardened by UV from the UV irradiator 4 before transferring to the substrate B, and it is possible to transfer the second ink layer L2 to the substrate B more reliably.

再者，在使橡皮布輥2旋轉之下，將第1油墨層L1與第2油墨層L2積層於橡皮布輥2上。即，步驟S102中，利用與橡皮布輥2相對向的噴墨噴頭31形成第1油墨層L1。又，在步驟S106中，在隨橡皮布輥2的旋轉而返回至與噴墨噴頭31對向位置處的第1油墨層L1上，利用噴墨噴頭31疊置形成第2油墨層L2。此構成中，因為第1油墨層L1與第2油墨層L2係由同一噴墨噴頭31形成，因而第1油墨層L1的形成位置、與第2油墨層L2的形成位置可輕易疊置。又，因為第1油墨層L1與第2油墨層L2的形成係共用同一噴墨噴頭31，故可減少零件數量。 Furthermore, while the blanket roller 2 is rotated, the first ink layer L1 and the second ink layer L2 are laminated on the blanket roller 2. That is, in step S102, the first ink layer L1 is formed by the inkjet head 31 facing the blanket roller 2. Furthermore, in step S106, upon the first ink layer L1 returning to the position facing the inkjet head 31 with the rotation of the blanket roller 2, the second ink layer L2 is formed by stacking the inkjet head 31. In this configuration, since the first ink layer L1 and the second ink layer L2 are formed by the same inkjet head 31, the formation position of the first ink layer L1 and the formation position of the second ink layer L2 can be easily overlapped. In addition, since the formation of the first ink layer L1 and the second ink layer L2 share the same inkjet head 31, the number of parts can be reduced.

圖7所示係本發明第2實施形態的印刷裝置之機械式構成一例之示意圖。以下，以與第1實施形態不同處為中心進行說明，共通部分加註相同元件符號並適當省略說明。惟，當然藉由具備與第1實施形態共通的構成，可達同樣的效果。 Fig. 7 is a schematic diagram showing an example of the mechanical configuration of the printing apparatus according to the second embodiment of the present invention. Hereinafter, the description will be centered on the differences from the first embodiment, and the same reference numerals are assigned to common parts, and the description will be omitted as appropriate. However, of course, the same effect can be achieved by having the same configuration as the first embodiment.

第2實施形態不同於第1實施形態之處在於：在橡皮布輥2的旋轉方向D2上，於UV照射器4下游側且轉印位置Pt上游側，設置相對向於橡皮布輥2外周面的噴墨噴頭32。噴墨噴頭32係具備與噴墨噴頭31相同構成，並吐出與從噴墨噴頭31所吐出UV油墨相同組成的UV油墨。然後，接受來自控制器9的控制，將UV油墨朝橡皮布輥2的外周面吐出。 The second embodiment is different from the first embodiment in that in the rotation direction D2 of the blanket roll 2, it is located on the downstream side of the UV irradiator 4 and on the upstream side of the transfer position Pt, facing the outer peripheral surface of the blanket roll 2 The inkjet nozzle 32. The inkjet head 32 has the same structure as the inkjet head 31 and discharges UV ink having the same composition as the UV ink discharged from the inkjet head 31. Then, under the control from the controller 9, the UV oil The ink is ejected toward the outer peripheral surface of the blanket roller 2.

該第2實施形態的印刷處理(圖3)，係在執行步驟S101~S105之後，由噴墨噴頭32在第1油墨層L1上積層形成第2油墨層L2(步驟S106)。具體而言，由控制器9將第2驅動信號S2傳送給噴墨噴頭32，由噴墨噴頭32根據第2驅動信號S2開始吐出UV油墨。此時，噴墨噴頭32開始吐出UV油墨的時間點，係配合第1油墨層L1到達相對向於噴墨噴頭32的時序而控制。因而，在構成第1油墨層L1的複數像點上，疊置吐出構成第2油墨層L2的複數像點。另外，該時序控制例如可根據橡皮布驅動部M2的編碼器輸出，由控制器9執行。依此，如圖5的「形成第2油墨層」欄位所示，第2驅動信號S2所表示之由複數像點(油墨滴)構成的第2油墨層L2積層於第1油墨層L1上，而形成圖像I。之後依照與第1實施形態同樣地執行步驟S107~S112，結束圖3的印刷處理。 In the printing process (FIG. 3) of the second embodiment, after steps S101 to S105 are executed, the inkjet head 32 forms the second ink layer L2 on the first ink layer L1 by stacking (step S106). Specifically, the controller 9 transmits the second drive signal S2 to the inkjet head 32, and the inkjet head 32 starts to discharge the UV ink based on the second drive signal S2. At this time, the time at which the inkjet head 32 starts to discharge the UV ink is controlled in accordance with the timing when the first ink layer L1 reaches the inkjet head 32. Therefore, the plurality of dots constituting the second ink layer L2 are superimposed and discharged on the plurality of dots constituting the first ink layer L1. In addition, this timing control can be performed by the controller 9 based on the encoder output of the blanket drive part M2, for example. Accordingly, as shown in the "form a second ink layer" column in FIG. 5, the second ink layer L2 composed of plural pixels (ink droplets) represented by the second drive signal S2 is laminated on the first ink layer L1 , And an image I is formed. After that, steps S107 to S112 are executed in the same manner as in the first embodiment, and the printing process of FIG. 3 is ended.

該第2實施形態亦在橡皮布輥2上依序疊置形成第1油墨層L1與第2油墨層L2。又，第1油墨層L1係藉由接受光照射，而在第2油墨層L2形成前即預先硬化。藉此，在橡皮布輥2上依序積層著：已硬化的第1油墨層L1、與未接受UV照射而未硬化的第2油墨層L2。然後，藉由使未硬化的第2油墨層L2接觸到基板B，第1油墨層L1與第2油墨層L2從橡皮布輥2被轉印於基板B。所以，不需要與UV油墨不同的材料，即可從橡皮布輥2確實地將UV油墨轉印於基板B。 In the second embodiment, the first ink layer L1 and the second ink layer L2 are also formed on the blanket roll 2 in order. In addition, the first ink layer L1 is irradiated with light to be cured in advance before the second ink layer L2 is formed. Thereby, the first ink layer L1 that has been cured and the second ink layer L2 that has not received UV irradiation and has not been cured are sequentially laminated on the blanket roller 2. Then, by bringing the uncured second ink layer L2 into contact with the substrate B, the first ink layer L1 and the second ink layer L2 are transferred from the blanket roll 2 to the substrate B. Therefore, it is possible to reliably transfer the UV ink to the substrate B from the blanket roller 2 without a material different from the UV ink.

再者，在使橡皮布輥2旋轉之下，在橡皮布輥2上積層著第1油墨層L1與第2油墨層L2。即，在步驟S102中，利用與橡皮布輥2相對向的噴墨噴頭31形成第1油墨層L1。又，在步驟S106中，在較噴墨噴頭31更靠旋轉方向D2下游側，利用與橡皮布輥2相對向的噴墨噴頭32，於第1油墨層L1上疊置形成第2油墨層L2。此構成中，在第1油墨層L1上疊置第2油墨層L2時，不需要如第1實施形態般使橡皮布輥2旋轉一周，可達到產能提升。 Furthermore, when the blanket roll 2 is rotated, the first ink layer L1 and the second ink layer L2 are laminated on the blanket roll 2. That is, in step S102, the first ink layer L1 is formed by the inkjet head 31 facing the blanket roller 2. Furthermore, in step S106, on the downstream side of the inkjet head 31 in the rotation direction D2, the inkjet head 32 facing the blanket roller 2 is used to form a second ink layer L2 on the first ink layer L1. . In this configuration, when the second ink layer L2 is stacked on the first ink layer L1, it is not necessary to rotate the blanket roll 2 once as in the first embodiment, and the productivity can be increased.

依上述，各實施形態中，印刷裝置1相當於本發明「印刷裝置」一例，橡皮布輥2相當於本發明「轉印構件」一例，UV照射器4相當於本發明「光照射部」一例，平台5相當於本發明「轉印部」一例。又，第1實施形態中，噴墨噴頭31相當於本發明「油墨吐出部」一例，第2實施形態中，由噴墨噴頭31、32互動而發揮本發明「油墨吐出部」一例的機能。 According to the above, in each embodiment, the printing device 1 corresponds to an example of the "printing device" of the present invention, the blanket roller 2 corresponds to an example of the "transfer member" of the present invention, and the UV irradiator 4 corresponds to an example of the "light irradiation unit" of the present invention. The platform 5 corresponds to an example of the "transfer part" of the present invention. In the first embodiment, the inkjet head 31 corresponds to an example of the "ink ejection unit" of the present invention. In the second embodiment, the inkjet heads 31 and 32 interact to perform the function of an example of the "ink ejection unit" of the present invention.

再者，各實施形態中，圖3的印刷處理係相當於本發明「印刷方法」一例，步驟S102係相當於本發明「第1吐出步驟」一例，步驟S103係相當於本發明「第1光照射步驟」一例，步驟S106係相當於本發明「第2吐出步驟」一例，步驟S108係相當於本發明「轉印步驟」一例，步驟S109係相當於本發明「第2光照射步驟」一例，UV照射器4係相當於本發明「光照射器」一例，橡皮布輥2係相當於本發明「轉印構件」或「輥」一例。又，第1實施形態中，噴墨噴頭31係相當於本發明「噴墨噴頭」一例，第2實施形態中，噴墨噴頭31係相當於本發明「第1噴墨噴頭」一例，噴墨噴頭32係相當於本發明「第2噴墨噴頭」一例。 Furthermore, in each embodiment, the printing process of FIG. 3 corresponds to an example of the "printing method" of the present invention, step S102 corresponds to an example of the "first discharge step" of the present invention, and step S103 corresponds to the "first light" of the present invention. An example of "irradiation step", step S106 corresponds to an example of the "second discharge step" of the present invention, step S108 corresponds to an example of the "transfer step" of the present invention, and step S109 corresponds to an example of the "second light irradiation step" of the present invention. The UV irradiator 4 corresponds to an example of the "light irradiator" of the present invention, and the blanket roller 2 corresponds to an example of the "transfer member" or "roller" of the present invention. Furthermore, in the first embodiment, the inkjet head 31 corresponds to an example of the "inkjet head" of the present invention, and in the second embodiment, the inkjet head 31 corresponds to an example of the "first inkjet head" of the present invention. The head 32 corresponds to an example of the "second inkjet head" of the present invention.

再者，各實施形態中，UV油墨係相當於本發明「光硬化性油墨」一例，UV係相當於本發明「光」一例，第1油墨層L1係相當於本發明「第1油墨層」一例，第2油墨層L2係相當於本發明「第2油墨層」一例，基板B係相當於本發明「印刷對象」一例。 Furthermore, in each embodiment, the UV ink system corresponds to an example of the "photocurable ink" of the present invention, the UV system corresponds to an example of the "light" of the present invention, and the first ink layer L1 corresponds to the "first ink layer" of the present invention. For example, the second ink layer L2 corresponds to an example of the "second ink layer" of the present invention, and the substrate B corresponds to an example of the "printing target" of the present invention.

另外，本發明並不侷限於上述實施形態，在不脫離主旨之前提下，亦可進行上述以外的各種變更。例如雖在上述實施形態中未詳述，但有關構成第1油墨層L1的UV油墨量(第1油墨量)、與構成第2油墨層L2的油墨量(第2油墨量)之關係，可存在變動。具體而言，存在有：第1油墨量較少於第2油墨量的變動、第1油墨量與第2油墨量相等的變動、以及第1油墨量較多於第2油墨量的變動。該等變動各具優點。例如在第1油墨量與第2油墨量相等的情況，第1驅動信號S1與第2驅動信號S2可使用共通的驅動信號，具有控制簡單的優點。 In addition, the present invention is not limited to the above-mentioned embodiment, and various changes other than the above can be made without departing from the gist. For example, although not described in detail in the above embodiment, the relationship between the amount of UV ink constituting the first ink layer L1 (first ink amount) and the amount of ink constituting the second ink layer L2 (second ink amount) can be There are changes. Specifically, there are fluctuations in which the first ink amount is smaller than the second ink amount, fluctuations in which the first ink amount is equal to the second ink amount, and fluctuations in which the first ink amount is larger than the second ink amount. Each of these changes has its advantages. For example, when the first ink amount is equal to the second ink amount, the first drive signal S1 and the second drive signal S2 can use a common drive signal, which has the advantage of simple control.

再者，有關從UV照射器4對UV油墨賦予的UV能量量(第1能量量)、與由UV照射器6對UV油墨賦予的UV能量量(第2能量量)之關係，亦存在變動。具體而言，存在有：第1能量量較少於第2能量量的變動、第1能量量與第2能量量相等的變動、以及第1能量量較多於第2能量量的變動。該等變動各具優點。例如在第2能量量為第1能量量以上的情況，具有能使轉印於基板B上的圖像I(UV油墨)確實硬化之優點。尤其當第1能量量與第2能量量相等的情況，可對同一構成的UV照射器4、6提供共通的信號，更具有構成與控制變得簡單的優點。 Furthermore, the relationship between the amount of UV energy (first energy amount) imparted to the UV ink from the UV irradiator 4 and the amount of UV energy (second energy amount) imparted to the UV ink by the UV irradiator 6 also varies. . Specifically, there are fluctuations in which the first energy amount is less than the second energy amount, fluctuations in which the first energy amount is equal to the second energy amount, and fluctuations in which the first energy amount is larger than the second energy amount. Each of these changes has its advantages. For example, when the second energy amount is greater than or equal to the first energy amount, there is an advantage that the image I (UV ink) transferred on the substrate B can be cured reliably. Especially when the first energy and the second energy If they are equal, a common signal can be provided to the UV irradiators 4 and 6 of the same configuration, which has the advantage of simpler configuration and control.

再者，有關構成第1油墨層L1的UV油墨、與構成第2油墨層L2的UV油墨之組成，亦可存在變動。即，如上述，第1油墨層L1與第2油墨層L2亦可由具同一組成的UV油墨構成，亦可由具不同組成的UV油墨構成。在後者的情況亦可更進一步於第1油墨層L1與第2油墨層L2中，設定成其中一者係由有色的UV油墨構成，另一者係由透明的UV油墨構成。該等變動各具優點。例如當第1油墨層L1係由透明的UV油墨構成、而第2油墨層L2係由有色的UV油墨構成時，可使經轉印於基板B後的圖像I呈現光澤感。 Furthermore, there may be variations in the composition of the UV ink constituting the first ink layer L1 and the UV ink constituting the second ink layer L2. That is, as described above, the first ink layer L1 and the second ink layer L2 may be composed of UV inks having the same composition, or may be composed of UV inks having different compositions. In the latter case, it is also possible to further set the first ink layer L1 and the second ink layer L2 so that one of them is made of colored UV ink and the other is made of transparent UV ink. Each of these changes has its advantages. For example, when the first ink layer L1 is composed of transparent UV ink and the second ink layer L2 is composed of colored UV ink, the image I transferred to the substrate B can be rendered glossy.

再者，未必需要利用UV照射器4使第1油墨層L1完全硬化。即，即使未使第1油墨層L1完全硬化，藉由以一定量的UV照射使某程度硬化，仍可提升第1油墨層L1從橡皮布輥2的剝離性。 Furthermore, it is not necessary to completely cure the first ink layer L1 by the UV irradiator 4. That is, even if the first ink layer L1 is not completely cured, the releasability of the first ink layer L1 from the blanket roll 2 can be improved by curing to a certain extent with a certain amount of UV irradiation.

再者，印刷裝置1並不侷限於如上述實施形態般僅印刷單色圖像I，亦可印刷彩色圖像I。變更為該彩色圖像的印刷，可分別對第1、第2實施形態執行。例如變更第1實施形態時，只要使吐出互異顏色UV油墨的複數噴墨噴頭31在旋轉方向D2上排列並與橡皮布輥2呈相對向，且在該等旋轉方向D2的下游側配置UV照射器4即可。然後，針對各色形成第1油墨層L1之後，只要從UV照射器4對由該等所形成的彩色之第1油墨層L1照射UV即可。 In addition, the printing apparatus 1 is not limited to printing only the monochrome image I as in the above-mentioned embodiment, and may also print the color image I. The change to the color image printing can be performed for the first and second embodiments respectively. For example, when changing the first embodiment, it is only necessary to arrange a plurality of inkjet heads 31 that discharge UV inks of different colors in the direction of rotation D2 and face the blanket roller 2, and arrange the UV on the downstream side of the direction of rotation D2. The illuminator 4 is enough. Then, after the first ink layer L1 is formed for each color, the UV irradiator 4 only needs to irradiate UV to the first ink layer L1 of the color formed by these colors.

或者，在變更第2實施形態的情況，係使吐出互異色UV油墨的複數噴墨噴頭31排列於旋轉方向D2上，並在該等的旋轉方向D2下游側，將吐出互異色UV油墨的複數噴墨噴頭32排列於旋轉方向D2，並使該等相對向於橡皮布輥2外周面。然後，只要在噴墨噴頭31與噴墨噴頭32之間配置UV照射器4即可。然後，針對各色在由噴墨噴頭31形成第1油墨層L1後，藉由從UV照射器4對由該等所形成的彩色之第1油墨層L1照射UV，使第1油墨層L1硬化，然後利用噴墨噴頭32於第1油墨層L1上疊置形成第2油墨層L2即可。 Alternatively, in the case of modifying the second embodiment, a plurality of inkjet heads 31 that discharge mutually different color UV inks are arranged in the rotation direction D2, and the plural number of different color UV inks are discharged downstream of the rotation direction D2. The inkjet nozzles 32 are arranged in the rotation direction D2 and are opposed to the outer peripheral surface of the blanket roll 2. Then, it is only necessary to arrange the UV irradiator 4 between the inkjet head 31 and the inkjet head 32. Then, after the first ink layer L1 is formed by the inkjet head 31 for each color, the UV irradiator 4 irradiates the first ink layer L1 of the colors formed by the UV irradiator 4 to harden the first ink layer L1. Then, the inkjet head 32 is used to form the second ink layer L2 by stacking on the first ink layer L1.

再者，轉印構件的具體構成並不侷限於上述橡皮布輥2。所以，例如亦可使用表面設有彈性體的平板上之橡皮布。 In addition, the specific configuration of the transfer member is not limited to the blanket roller 2 described above. Therefore, for example, a blanket on a flat plate with an elastic body can also be used.

再者，上述實施形態係顯示在第1油墨層L1的像點上，理想性地重疊了第2油墨層L2之像點的狀態(例如圖5)。然而，基於像點著滴位置精度存在偏差等理由，有第1油墨層L1與第2油墨層L2的各自像點著滴位置發生偏移的可能性。然而，即使該等著滴位置在精度偏差範圍內發生偏移，仍可使第1油墨層L1的像點、與第2油墨層L2的像點部分性地重複。而且，該等像點均係由UV油墨組成，彼此具有親和性。所以，如上述，因為在相互界面處相混合，因而仍可獲得所需效果。 In addition, the above-mentioned embodiment shows a state where the dots of the second ink layer L2 are ideally superimposed on the dots of the first ink layer L1 (for example, FIG. 5). However, there is a possibility that the respective image drop positions of the first ink layer L1 and the second ink layer L2 may be shifted due to the deviation in the accuracy of the image drop position. However, even if the landing position is shifted within the accuracy deviation range, the image point of the first ink layer L1 and the image point of the second ink layer L2 can be partially overlapped. Moreover, these image points are all composed of UV ink, which has affinity for each other. Therefore, as mentioned above, because of the mixing at the mutual interface, the desired effect can still be obtained.

再者，上述實施形態中，係於第1油墨層L1形成途中即開始從UV照射器4照射UV。其理由在於第1油墨層L1的形成途中，第1油墨層L1的前頭即到達UV照射範圍R4。即，在第1油墨層L1的旋轉方向D2上之尺寸較短時，係在第1油墨層L1的形成完成之後，才開始從UV照射器4照射UV。 Furthermore, in the above-mentioned embodiment, it starts when the first ink layer L1 is formed. UV is irradiated from the UV irradiator 4. The reason is that during the formation of the first ink layer L1, the front of the first ink layer L1 reaches the UV irradiation range R4. That is, when the dimension in the rotation direction D2 of the first ink layer L1 is short, the UV irradiation from the UV irradiator 4 starts after the formation of the first ink layer L1 is completed.

但是，使用UV照射器4的印刷裝置1中，若來自UV照射器4的UV射入於噴墨噴頭31的噴嘴部分，則在噴嘴部分處所附著的UV油墨會硬化，有導致發生噴嘴阻塞的情況。所以，亦可如下示般構成印刷裝置1。 However, in the printing device 1 using the UV irradiator 4, if the UV from the UV irradiator 4 is incident on the nozzle portion of the inkjet head 31, the UV ink adhering to the nozzle portion will harden, causing nozzle clogging. Happening. Therefore, the printing apparatus 1 may be configured as shown below.

圖8所示係本發明第3實施形態的印刷裝置機械式構成一例之示意圖。圖8所示印刷裝置1係在第1實施形態的印刷裝置中，更進一步具備有在噴墨噴頭31與UV照射器4之間配置的遮光構件7，遮光構件7係阻斷光從UV照射器4朝噴墨噴頭31的行進。所以，可抑制噴嘴阻塞發生。又，根據該印刷裝置1，在截至形成第2油墨層L2為止的期間，UV照射器4亦可保持常亮燈無妨。依此可使UV照射器4的亮燈‧熄燈之控制簡單化。 Fig. 8 is a schematic diagram showing an example of the mechanical configuration of a printing apparatus according to a third embodiment of the present invention. The printing device 1 shown in FIG. 8 is the printing device of the first embodiment, and further includes a shading member 7 arranged between the inkjet head 31 and the UV irradiator 4, and the shading member 7 blocks light from being irradiated with UV. The device 4 travels toward the inkjet head 31. Therefore, the occurrence of nozzle clogging can be suppressed. In addition, according to this printing apparatus 1, the UV irradiator 4 may be kept on continuously until the second ink layer L2 is formed. In this way, the control of turning on and turning off the UV irradiator 4 can be simplified.

或者，在第2實施形態的印刷裝置中設置遮光構件7的情況，係分別在噴墨噴頭31與UV照射器4之間、以及UV照射器4與噴墨噴頭32之間設置遮光構件7。於該構成中，各自的遮光構件7阻斷光從UV照射器4朝噴墨噴頭31及噴墨噴頭32的行進。所以，可抑制噴嘴阻塞發生。又，根據該印刷裝置1，UV照射器4亦可保持常亮燈無妨。依此可使UV照射器4的亮燈‧熄燈之控制簡單化。 Alternatively, when the light shielding member 7 is provided in the printing apparatus of the second embodiment, the light shielding member 7 is provided between the inkjet head 31 and the UV irradiator 4 and between the UV irradiator 4 and the inkjet head 32, respectively. In this configuration, the respective light-shielding members 7 block light from the UV irradiator 4 toward the inkjet head 31 and the inkjet head 32. Therefore, the occurrence of nozzle clogging can be suppressed. In addition, according to the printing device 1, the UV irradiator 4 can be kept on constantly. In this way, the light on and off control of the UV irradiator 4 can be easily controlled 化.

再者，上述實施形態中，由第1油墨層L1與第2油墨層L2等2層構成圖像I，惟本發明並不侷限於雙層，亦可達2層以上。例如欲加深濃度時，只要重疊印刷油墨層直到成為所需濃度為止即可。 Furthermore, in the above embodiment, the image I is constituted by two layers, such as the first ink layer L1 and the second ink layer L2. However, the present invention is not limited to two layers, and two or more layers may be used. For example, when the density is to be deepened, it is only necessary to overlap the printing ink layer until it reaches the desired density.

再者，從UV照射器4所照射的UV強度並不需為均勻，亦可具有分佈。例如可配合每單位面積的油墨附著量，改變所照射的UV強度。具體而言，在每單位面積的油墨附著量較多處增強UV的強度，另一方面，在每單位面積的油墨附著量較少處減弱UV的強度。此時，每單位面積的油墨附著量可根據驅動信號S1、S2等進行判斷。 Furthermore, the UV intensity irradiated from the UV irradiator 4 does not need to be uniform, and may have a distribution. For example, it is possible to change the intensity of the irradiated UV according to the amount of ink adhesion per unit area. Specifically, the UV intensity is increased where the ink adhesion amount per unit area is large, while the UV intensity is weakened where the ink adhesion amount per unit area is small. At this time, the ink adhesion amount per unit area can be determined based on the driving signals S1, S2, and so on.

[實施例] [Example]

其次，例示本發明實施例，惟本發明並不受下述實施例任何限制，舉凡在符合前後述要旨的範圍內，當然可適當地變更追加實施，該等均涵括於本發明技術範疇內。 Secondly, the embodiments of the present invention are illustrated. However, the present invention is not limited by the following embodiments. Of course, any changes and additions can be made within the scope that meets the gist of the preceding and following descriptions, and these are all included in the technical scope of the present invention. .

圖9所示係本發明具體的實驗結果一例之圖。比較例1係將朝橡皮布上吐出的UV油墨，在未硬化之下即轉印於白色PET(Polyethylene terephthalate，聚對苯二甲酸乙二酯)時的印刷結果。比較例2係朝橡皮布上吐出的UV油墨經硬化後，才轉印於白色PET時的印刷結果。實施例係將完全硬化的第1油墨層L1、與未硬化的第2油墨層L2積層於橡皮布上之後，才將該等轉印於PET時的印刷結果。比較例1的印刷圖像中發現到滲色情形，比較例2的印刷圖像中發現到露出底層的部分。相對於此，可知實施例可獲得良好的印刷圖像，能實現確實的轉印。 Fig. 9 is a graph showing an example of a specific experimental result of the present invention. Comparative Example 1 is the printing result when the UV ink discharged onto the blanket was transferred to white PET (Polyethylene terephthalate) without being hardened. Comparative Example 2 is a printing result when the UV ink discharged onto the blanket is hardened and then transferred to the white PET. The embodiment is to combine the fully hardened first ink layer L1, and After the uncured second ink layer L2 is laminated on the blanket, the printing result when it is transferred to PET. Bleeding was found in the printed image of Comparative Example 1, and the printed image of Comparative Example 2 was found to expose the bottom layer. On the other hand, it can be seen that the example can obtain a good printed image and can realize a reliable transfer.

本發明係可適用於藉由將利用噴墨方式朝轉印構件吐出的油墨，從轉印構件轉印給印刷對象，而執行印刷的所有印刷技術。 The present invention is applicable to all printing technologies that perform printing by transferring ink discharged to a transfer member by an inkjet method from the transfer member to a printing object.

2‧‧‧橡皮布輥 2‧‧‧Blanket roller

L1‧‧‧第1油墨層 L1‧‧‧The first ink layer

L2‧‧‧第2油墨層 L2‧‧‧The second ink layer

I‧‧‧圖像 I‧‧‧Image

F1‧‧‧密接力 F1‧‧‧Close Relay

F2‧‧‧油墨凝聚力 F2‧‧‧Ink cohesion

F3‧‧‧密接力 F3‧‧‧Close Relay

B‧‧‧基板 B‧‧‧Substrate

Claims

一種印刷方法，係包括有：第1吐出步驟，其係將利用光照射而硬化的光硬化性油墨，藉由噴墨方式朝轉印構件吐出，而在上述轉印構件上形成第1油墨層；第1光照射步驟，其藉由對上述第1油墨層照射光而使上述第1油墨層硬化；第2吐出步驟，其朝在上述轉印構件上經硬化的上述第1油墨層，利用上述噴墨方式吐出上述光硬化性油墨，形成疊置於上述第1油墨層上的第2油墨層，藉此於上述轉印構件上依序積層經硬化的上述第1油墨層及未硬化的上述第2油墨層；以及轉印步驟，其藉由使未硬化的上述第2油墨層接觸於印刷對象，將上述第1油墨層與上述第2油墨層從上述轉印構件轉印於上述印刷對象；上述轉印構件係朝既定旋轉方向進行旋轉的輥；上述第1吐出步驟係利用與上述轉印構件相對向的噴墨噴頭，形成上述第1油墨層；上述第2吐出步驟係在隨上述轉印構件的旋轉而返回至與上述噴墨噴頭相對向位置的上述第1油墨層上，利用上述噴墨噴頭疊置形成上述第2油墨層。 A printing method comprising: a first discharging step of discharging a photocurable ink hardened by light irradiation to a transfer member by an inkjet method to form a first ink layer on the transfer member ; A first light irradiation step, which hardens the first ink layer by irradiating light on the first ink layer; a second discharge step, which uses the first ink layer hardened on the transfer member The inkjet method ejects the photocurable ink to form a second ink layer superimposed on the first ink layer, whereby the cured first ink layer and the uncured ink layer are sequentially laminated on the transfer member The second ink layer; and a transfer step of transferring the first ink layer and the second ink layer from the transfer member to the printing by contacting the uncured second ink layer with the printing object Object: The transfer member is a roller that rotates in a predetermined rotation direction; the first discharge step is to use an inkjet head facing the transfer member to form the first ink layer; the second discharge step is followed by The rotation of the transfer member returns to the first ink layer at a position facing the inkjet head, and the second ink layer is formed by stacking the inkjet head.

如請求項1之印刷方法，其中，上述第1光照射步驟中，使上述第1油墨層完全硬化。 The printing method of claim 1, wherein in the first light irradiation step, the first ink layer is completely cured.

如請求項1或2之印刷方法，其中，更進一步包括有：第2光照射步驟，係藉由對於上述轉印步驟中轉印於上述印刷對象的上述第2油墨層施行光照射，而使上述第2油墨層完全硬化。 The printing method of claim 1 or 2, which further includes: a second light irradiation step of irradiating light on the second ink layer transferred to the printing object in the transfer step, so that The second ink layer is completely cured.

如請求項1或2之印刷方法，其中，相較於上述第1吐出步驟中為了形成上述第1油墨層而吐出上述光硬化性油墨起、直到上述第1光照射步驟中使上述光硬化性油墨硬化為止的期間，於上述第2吐出步驟中形成上述第2油墨層起、直到在上述轉印步驟中轉印上述第1油墨層與上述第2油墨層為止的期間更長。 The printing method of claim 1 or 2, wherein the photocurable ink is discharged in order to form the first ink layer in the first discharge step until the photocurable ink is discharged in the first light irradiation step. The period until the ink is cured is longer from the formation of the second ink layer in the second discharge step until the transfer of the first ink layer and the second ink layer in the transfer step.

如請求項1或2之印刷方法，其中，上述第1油墨層與上述第2油墨層中，其中一者係有色的上述光硬化性油墨，另一者係透明的上述硬化性油墨。 The printing method of claim 1 or 2, wherein one of the first ink layer and the second ink layer is the colored photocurable ink, and the other is the transparent curable ink.

如請求項1或2之印刷方法，其中，上述第1光照射步驟中，利用與上述轉印構件相對向的光照射器施行光照射；上述光照射器係在使上述第1油墨層硬化之後、且於開始形成上述第2油墨層之前熄燈。 The printing method of claim 1 or 2, wherein, in the first light irradiation step, light irradiation is performed with a light irradiator facing the transfer member; the light irradiator is after curing the first ink layer And turn off the lights before starting to form the second ink layer.

一種印刷裝置，係具備有：轉印構件；油墨吐出部，其將利用光照射而硬化的光硬化性油墨，利用噴墨方式朝上述轉印構件吐出，藉此在上述轉印構件上形成第1油墨層，並且在上述第1油墨層上疊置形成第2油墨層；光照射部，其係於上述第2油墨層形成前，朝在上述轉印構件上所形成的上述第1油墨層施行光照射，藉此使上述第1油墨層硬化，俾於上述轉印構件上依序形成經硬化的第1油墨層與未硬化的第2油墨層；以及轉印部，其使疊置於硬化後的上述第1油墨層之未硬化的上述第2油墨層接觸於印刷對象，藉此將上述第1油墨層與上述第2油墨層從上述轉印構件轉印於上述印刷對象；上述轉印構件係朝既定旋轉方向進行旋轉之輥；利用與上述轉印構件相對向的噴墨噴頭形成上述第1油墨層後，在隨上述轉印構件的旋轉而返回至與上述噴墨噴頭相對向位置的上述第1油墨層上，利用上述噴墨噴頭疊置形成上述第2油墨層。 A printing device is provided with: a transfer member; and an ink ejection unit that ejects photocurable ink cured by light irradiation toward the transfer member by an inkjet method, thereby forming a first transfer member on the transfer member. 1 ink layer, and superimpose the second ink layer on the first ink layer; the light irradiating part, which is before the second ink layer is formed, faces the first ink layer formed on the transfer member Light irradiation is performed to harden the first ink layer, so that a hardened first ink layer and an uncured second ink layer are sequentially formed on the transfer member; and a transfer portion that is stacked The uncured second ink layer of the first ink layer after curing is in contact with the printing object, thereby transferring the first ink layer and the second ink layer from the transfer member to the printing object; The transfer member is a roller that rotates in a predetermined rotation direction; after the first ink layer is formed by the inkjet head facing the transfer member, it returns to the inkjet head with the rotation of the transfer member The second ink layer is formed by stacking the inkjet head on the first ink layer at the opposite position.