TW201805131A - Blade die, film punching method using blade die, and punching device equipped with blade die - Google Patents

Abstract

Provided are: a blade die that, when punching a film, enables reducing damage delivered to the film; a film punching method using said blade die; and a punching device equipped with said blade die. The blade die according to the present invention is provided with: a punching blade that has a closed shape when viewed in a plan view; and sub blades that are disposed on an outer side of said punching blade. In one embodiment of the present invention, the sub blades are disposed in a discontinuous manner along the punching blade. In one embodiment of the present invention, the punching blade is configured to have a blade height taller than that of the sub blades.

Description

刀模、使用該刀模之膜之沖壓方法及具備該刀模之沖壓裝置Knife mold, punching method using film of the same, and punching device provided with the same

本發明係關於一種刀模、使用該刀模之膜之沖壓方法、及具備該刀模之沖壓裝置。The present invention relates to a die, a punching method of a film using the die, and a punching device provided with the die.

先前，在膜製品之製造中，進行自以大面積獲得之母膜沖壓相應於用途之形狀之膜製品。一般而言，在沖壓母膜時使用具備特定之沖壓刀之刀模。然而，在沖壓時自沖壓刀對膜施加之力不一定均一，在不均一之力施加至製品時，存在膜製品受損傷(例如壓痕、在膜製品係積層體之情形下之剝離等)之情形。尤其是，在偏光板等之光學膜之沖壓中，上述之問題變得顯著。 [先前技術文獻] [專利文獻] [專利文獻1]日本特開2009-56735號公報Previously, in the manufacture of film products, stamping of a film product corresponding to a use from a mother film obtained in a large area was performed. Generally, a die having a specific punching blade is used when stamping the mother film. However, the force applied by the punch to the film during pressing is not necessarily uniform. When the uneven force is applied to the product, the film product is damaged (for example, indentation, peeling in the case of a film product laminate, etc.) Situation. In particular, the above-mentioned problems become significant in the punching of optical films such as polarizing plates. [Prior Art Document] [Patent Document] [Patent Document 1] Japanese Patent Laid-Open No. 2009-56735

[發明所欲解決之問題] 本發明係為了解決上述先前之課題而完成者，其主要目的在於提供一種可減少沖壓膜時對該膜賦予之損傷的刀模、使用該刀模之膜之沖壓方法、及具備該刀模之沖壓裝置。 [解決問題之技術手段] 本發明之刀模具備：具有封閉之俯視形狀之沖壓刀，及設置於該沖壓刀之外側之副刀。 在一實施形態中，上述副刀沿前述沖壓刀且不連續地設置。 在一實施形態中，上述沖壓刀之俯視形狀係具有角隅部之形狀，前述副刀至少設置於該角隅部之該沖壓刀之外側。 在一實施形態中，上述副刀之俯視形狀係沿前述沖壓刀之角隅且不具有頂點之形狀。 在一實施形態中，上述沖壓刀之刀高高於上述副刀之刀高。 在一實施形態中，上述沖壓刀與上述副刀之刀高之差為5 μm～700 μm。 根據本發明之另一態樣提供一種膜之沖壓方法。該膜之沖壓方法包含使用上述刀模將膜沖壓。 在一實施形態中，上述膜係光學膜。 在一實施形態中，上述膜係偏光板。 根據本發明之又一態樣提供一種膜之沖壓裝置。該膜之沖壓裝置具備上述刀模。 [發明之效果] 根據本發明能夠提供一種藉由在沖壓刀之外側設置副刀而可減少沖壓膜時對該膜賦予之損傷的刀模。[Problems to be Solved by the Invention] The present invention has been made in order to solve the above-mentioned problems, and its main purpose is to provide a die capable of reducing damage to the film when the film is punched, and punching of the film using the same Method and punching device provided with the die. [Technical Means for Solving the Problem] The die of the present invention includes a punching blade having a closed plan shape, and a sub-knife provided outside the punching blade. In one embodiment, the auxiliary knife is provided discontinuously along the punching knife. In one embodiment, the shape of the punching blade in plan view is a shape of a corner, and the auxiliary knife is provided at least on the outside of the punching blade of the corner. In one embodiment, the plan view shape of the auxiliary knife is a shape that does not have a vertex along the corner of the punching knife. In one embodiment, the blade height of the punching blade is higher than the blade height of the auxiliary blade. In one embodiment, a difference in blade height between the punching blade and the auxiliary blade is 5 μm to 700 μm. According to another aspect of the present invention, a method for punching a film is provided. The film punching method includes punching the film using the die. In one embodiment, the film-based optical film. In one embodiment, the film-based polarizing plate. According to another aspect of the present invention, a film punching device is provided. This film punching apparatus is provided with the said die. [Effects of the Invention] According to the present invention, it is possible to provide a die capable of reducing damage to a film when a film is punched by providing a sub-knife on the outside of the punch.

A. 刀模 圖1係本發明之一實施形態之刀模之概略平面圖。刀模100具備：沖壓刀10、及副刀20。沖壓刀10具有封閉之俯視形狀。在使用刀模100沖壓膜時，利用沖壓刀10沖壓膜。副刀20設置於沖壓刀10之外側。在一實施形態中，副刀20以沿沖壓刀10之方式設置。在圖1中顯示僅具備1組包含沖壓刀及副刀之組的刀模，但本發明之刀模可如圖2所示般具備複數組包含沖壓刀及副刀之組。此外，若使用1組包含沖壓刀及副刀之組，則能夠沖壓1片膜片。 在使用本發明之刀模沖壓膜之情形下，在膜與沖壓刀相接之時點對膜施加特定之力，進而將沖壓刀朝膜按壓(或將膜朝沖壓刀按壓)，在沖壓膜時，利用與該膜相接之副刀之作用使對膜施加之力分散。其結果為，可獲得減少膜之損傷、且防止壓痕等的沖壓膜。且，在膜係積層體之情形下，可防止該膜之層間剝離。以下，亦存在為了便於說明將膜與沖壓刀相接之時點稱為接觸時點，將自接觸時點進一步將刀模朝膜按壓之時點(或將膜朝刀模按壓之時點)稱為沖壓時點之情形。此外，膜在沖壓時點被切斷。 作為上述沖壓刀及副刀可使用任意之適切的刀物。作為用於沖壓刀及副刀之刀物可例舉例如湯姆遜刀、腐食刀、及雕刻刀等。 上述之沖壓刀之俯視形狀可為任意之適切的形狀。作為沖壓刀之俯視形狀可例舉例如大致正方形狀、大致長方形狀、大致圓形狀、及大致橢圓形狀等。且，沖壓刀之俯視形狀可為適宜地組合直線與曲線之形狀、及由曲率不同之複數條曲線構成之形狀。 較佳的是，副刀沿沖壓刀且不連續地設置。換言之，較佳的是，副刀並非以包圍沖壓刀之整個外周之方式設置。若以包圍沖壓刀之整個外周之方式設置，則有沖壓殘渣不必要地分離，而發生分離之沖壓殘渣載置於製品部分等之不良狀況之虞。且，藉由不連續地設置副刀，而能夠使在沖壓時點對膜施加之力良好地分散，且能夠更加減少膜之損傷。 副刀之刀長之總計長度相對於沖壓刀之刀長較佳的是10%～80%，更佳的是30%～60%。副刀之刀長之總計長度可根據沖壓刀之俯視形狀、及沖壓之膜之特性適切地設定。 在上述沖壓刀之俯視形狀係具有角隅部之形狀之情形下，較佳的是，上述副刀至少設置於沖壓刀之角隅部之該沖壓刀之外側(角隅部外側)。由於在沖壓時，在角隅部及屈曲部中對膜施加之力容易變得不均一，故較佳的是在該部分設置副刀。 圖3(a)至圖3(d)係本發明之一實施形態之沖壓刀及副刀之放大平面圖。在沖壓刀10具有角隅部之情形下，該角隅部外側之副刀20可採用例如圖3(a)至圖3(d)之形狀。具體而言，角隅部外側之副刀20可為沿沖壓刀10之角隅且具有頂點之形狀(圖3(a))，可為沿沖壓刀10之角隅且不具有頂點(在頂點中斷)之形狀(圖3(b))，可為如局部地包圍該角隅之曲線狀(圖3(c))，亦可為直線狀且形成該角隅之一邊與副刀形成之角度a和形成該角隅之另一邊與副刀形成之角度b的差為020(較佳的是05)的形狀(圖3(d))。較佳的是，角隅部外側之副刀20係如圖3(b)所示般為沿沖壓刀10之角隅且不具有頂點之形狀。若如上述般角隅部外側之副刀隔以間隔而設置，則能夠使在沖壓時點對膜施加之力良好地分散，能夠更加減少膜之損傷。 圖4係本發明之一實施形態之沖壓刀及副刀之概略剖視圖。此外，為了易於觀察，圖4之刀之高度、及間隙等之比率存在與實際不同之情形。 較佳的是，沖壓刀10之刀高A高於副刀20之刀高B。如此，能夠在接觸時點對該膜施加充分的力。 沖壓刀與副刀之刀高之差較佳的是5 μm～700 μm，更佳的是5 μm～500 μm，尤佳的是5 μm～200 μm，特佳的是5 μm～50 μm，最佳的是5 μm～15 μm。若為如以上之範圍，則在沖壓時點，能夠使對膜施加之力良好地分散。且，能夠防止沖壓殘渣之不必要之分離。 沖壓刀與副刀之間隙X(頂點間距離X)可根據沖壓之膜之特性(材質、柔軟性)、形狀等設定為任意之適切距離。該間隙X較佳的是0.5 mm～4 mm，更佳的是0.5 mm～2.5 mm。只要能獲得本發明之效果，則該間隙以較小者為較佳。此係由於藉由縮小間隙而能夠減少沖壓殘渣，提高製品成品率之故。B. 膜之沖壓方法 圖5係說明一實施形態之本發明之膜之沖壓方法之概略圖。在該實施形態中，使用將上述刀模100安裝於基座板200而構成之沖壓機構300。在該實施形態中，在將膜500搬送至配置於該沖壓機構300下之切割板400上後，藉由使該沖壓機構300朝向膜500朝下方移動，或使切割板400朝向沖壓機構300朝上方移動，使刀模100抵接於膜500(實質上是沖壓刀抵接)並壓入，而將膜500沖壓，從而獲得特定形狀之膜片。 上述副刀可貫通膜，亦可不貫通。較佳的是，副刀以不貫通膜之方式(亦即半切割膜之方式)設置。 作為用於本發明之沖壓方法之膜可使用任意之適切的膜。在一實施形態中，將光學膜用作上述膜。作為光學膜可例舉例如偏光板、相位差膜等。先前，雖然光學膜會因沖壓導致之損傷(例如壓痕、剝離等)而容易影響其特性(光學特性)，但根據本發明，即便是如上述之光學膜，仍能夠抑制損傷而沖壓，而能夠獲得外觀及特性良好的膜。 在一實施形態中，作為用於沖壓方法之膜使用積層膜。在先前之方法中，存在於沖壓積層膜後容易在該積層膜發生層間剝離(尤其是在膜片端部之剝離)之問題，但根據本發明，能夠抑制層間剝離而沖壓積層膜。 用於沖壓方法之膜之厚度例如為0.15 mm～0.45 mm。 用於沖壓方法之膜可為長條狀，亦可為片狀。較佳的是長條狀。在圖5所示之實施形態中，在使用長條狀之膜之情形下重複以下一系列之動作，即：在將被加工部分搬送至切割板上後，暫時停止搬送而如上述般進行沖壓加工，在完成一次沖壓加工後，將下一被沖壓之被加工部分搬送至切割板，而進行下一沖壓加工，從而所有長條狀偏光板被用於沖壓加工。C. 沖壓裝置 本發明之沖壓裝置係用於膜之沖壓者，其具備上述刀模。在一實施形態中，本發明之沖壓裝置係如圖5所示般具備：沖壓機構300，其係將上述刀模100安裝於基座板200而構成；及切割板400，其與沖壓機構300對向配置，且在沖壓時承接刀模100。 根據本實施形態之沖壓裝置，在將作為被加工物之膜載置於切割板400上後，藉由使沖壓機構300朝向切割板400朝下方移動，或使切割板400朝向沖壓機構300朝上方移動，使刀模100抵接於偏光板500，而能夠沖壓膜。作為使沖壓機構及/或切割板移動之機構可採用任意的適切之機構。 上述沖壓裝置可組合搬送被加工物之任意之適切的搬送裝置(例如搬送帶、搬送輥等)、及在沖壓後去除沖壓殘渣之任意之適切的去除裝置等而使用。 [實施例] 以下，利用實施例具體地說明本發明，但本發明並非由該等實施例限定。 ［實施例1］ 使用具備圖2所示之形狀之沖壓刀(刀高：1.2 mm)及副刀(刀高：1.12 mm)之刀模沖壓膜，而獲得24片膜片。作為膜係使用偏光板(日東電工社製「NZD-UFQAMEGQ1773VDUHC-ACJ」)與保護膜(日東電工社製「PPF-100T」)之積層體(厚度219 μm)。 ［實施例2］ 使用具備大致矩形狀之沖壓刀(刀高：1.2 mm)、及配置於該沖壓刀之4個角隅部之外側之副刀的刀模沖壓實施例1中使用之膜，而獲得膜片。角隅部外側之副刀之形狀係如圖3(a)所示般設定為沿沖壓刀之角隅且具有頂點之形狀。 ［實施例3］ 使用具備大致矩形狀之沖壓刀(刀高：1.2 mm)、及配置於該沖壓刀之4個角隅部之外側之副刀的刀模沖壓實施例1中使用之膜，而獲得膜片。角隅部外側之副刀之形狀係如圖3(b)所示般設定為沿沖壓刀之角隅且不具有頂點(在頂點中斷)之形狀。 ［實施例4］ 使用具備大致矩形狀之沖壓刀(刀高：1.2 mm)、及配置於該沖壓刀之4個角隅部之外側之副刀的刀模沖壓實施例1中使用之膜，而獲得膜片。角隅部外側之副刀之形狀係如圖3(c)所示般設定為如包圍角隅之曲線狀。 ［實施例5］ 使用具備大致矩形狀之沖壓刀(刀高：1.2 mm)、及配置於該沖壓刀之4個角隅部之外側之副刀的刀模沖壓實施例1中使用之膜，而獲得膜片。角隅部外側之副刀之形狀係如圖3(d)所示般設定為直線狀且形成角隅之一邊與副刀形成之角度a和形成該角隅之另一邊與副刀形成之角度b成為相同角度的形狀。 ［比較例1］ 除自刀模排除副刀以外，與實施例1相同地沖壓膜而獲得膜片。 ［比較例2］ 除自刀模排除副刀以外，與實施例2相同地沖壓膜而獲得膜片。 ［評估1］ 確認在實施例1及比較例1獲得之24片膜片之外觀，確認有無自膜片端部(沖壓刀抵接之部位)之長度具有700 μm以上之翹起(亦即積層膜之層間剝離)、及有無自膜端部(沖壓刀抵接之部位)之長度為1000 μm以上之壓痕。 在表1中顯示產生上述翹起之膜片之片數、及產生上述壓痕之膜片之片數。 [表1] ［評估2］ 確認在實施例2至5及比較例2獲得之膜片之外觀，測定自膜片端部(沖壓刀抵接之部位)之翹起(亦即積層膜之層間剝離)之長度。在表2中結果。 [表2] A. Knife Die FIG. 1 is a schematic plan view of a knife die according to an embodiment of the present invention. The die 100 includes a punch 10 and an auxiliary knife 20. The punching blade 10 has a closed plan view shape. When the film is punched using the die 100, the film is punched with the punch 10. The auxiliary knife 20 is provided outside the punching knife 10. In one embodiment, the auxiliary knife 20 is provided along the punching knife 10. FIG. 1 shows that there is only one set of die sets including a punching knife and a sub-knife. However, the die set of the present invention may have a set of complex sets including a punching knife and a sub-knife as shown in FIG. 2. In addition, if a set including a punching blade and a sub-knife is used, a single diaphragm can be punched. In the case of using the knife die of the present invention to punch a film, a specific force is applied to the film when the film is in contact with the punching knife, and then the punching knife is pressed toward the film (or the film is pressed toward the punching knife). The force applied to the film is dispersed by the action of the auxiliary knife which is in contact with the film. As a result, it is possible to obtain a stamped film that reduces damage to the film and prevents dents and the like. Moreover, in the case of a film-based laminated body, peeling between layers of the film can be prevented. Hereinafter, for convenience of explanation, the point in time when the film is in contact with the punch is referred to as the point of contact, and the point in time when the die is further pressed against the film from the point of contact (or the point in which the film is pressed toward the die) is referred to as the point of punch. situation. In addition, the film was cut at the time of stamping. Any appropriate cutting object can be used as the punching blade and the auxiliary blade. Examples of the knives used for punching knives and auxiliary knives include Thomson knives, carrion knives, and carving knives. The above-mentioned shape of the punching blade may be any suitable shape. Examples of the plan view shape of the punching blade include a substantially square shape, a substantially rectangular shape, a substantially circular shape, and a substantially elliptical shape. In addition, the plan view shape of the punching blade may be a combination of a straight line and a curved line, and a shape composed of a plurality of curved lines having different curvatures. Preferably, the auxiliary knife is arranged discontinuously along the punching knife. In other words, it is preferable that the auxiliary knife is not provided so as to surround the entire periphery of the punching knife. If it is installed so as to surround the entire periphery of the punching blade, there is a possibility that the punching residue may be unnecessarily separated, and the separated punching residue may be placed in a product part, and the like may cause a disadvantage. In addition, by providing the sub-knife discontinuously, the force applied to the film at the time of pressing can be well dispersed, and damage to the film can be further reduced. The total length of the blade length of the auxiliary blade is preferably 10% to 80%, and more preferably 30% to 60%, relative to the blade length of the punching blade. The total length of the blade length of the auxiliary knife can be appropriately set according to the plan shape of the punching blade and the characteristics of the punched film. In a case where the plan view shape of the punching blade is a shape having a chamfered portion, it is preferable that the auxiliary knife is provided at least on the outer side of the punching blade (outside of the chamfered portion) of the corner portion of the punching blade. Since the force applied to the film in the corner portion and the buckled portion is likely to become non-uniform during punching, it is preferable to provide an auxiliary knife in this portion. 3 (a) to 3 (d) are enlarged plan views of a punching knife and an auxiliary knife according to an embodiment of the present invention. In the case where the punching blade 10 has a corner portion, the auxiliary blade 20 on the outside of the corner portion can adopt, for example, the shapes of FIGS. 3 (a) to 3 (d). Specifically, the auxiliary knife 20 on the outside of the corner portion may have a shape along the corner of the punching blade 10 and have vertices (FIG. 3 (a)), and may have a shape along the corner of the punching blade 10 without apex (on the vertex). The shape of the discontinuity (Figure 3 (b)) can be a curved shape that partially surrounds the corner (Figure 3 (c)), or it can be a straight line and the angle formed by one side of the corner and the auxiliary knife The shape in which the difference between a and the angle b formed by the other side forming the corner and the auxiliary knife is 020 (preferably 05) (Fig. 3 (d)). Preferably, as shown in FIG. 3 (b), the auxiliary knife 20 on the outer side of the corner is a shape along the corner of the punch 10 and does not have a vertex. If the auxiliary blades on the outer side of the corner portion are provided at intervals as described above, the force applied to the film at the time of pressing can be well dispersed, and the damage of the film can be further reduced. FIG. 4 is a schematic cross-sectional view of a punching knife and an auxiliary knife according to an embodiment of the present invention. In addition, for ease of observation, the ratio of the height of the knife and the clearance in FIG. 4 may be different from the actual situation. Preferably, the blade height A of the punching blade 10 is higher than the blade height B of the auxiliary blade 20. In this way, a sufficient force can be applied to the film at the point of contact. The difference between the blade height of the punching blade and the auxiliary blade is preferably 5 μm to 700 μm, more preferably 5 μm to 500 μm, even more preferably 5 μm to 200 μm, and particularly preferably 5 μm to 50 μm. The most preferable is 5 μm to 15 μm. If it is the range mentioned above, the force applied to a film can be disperse | distributed favorably at the time of a press. Moreover, unnecessary separation of the punching residue can be prevented. The gap X (distance X between the vertexes) of the punching blade and the auxiliary blade can be set to any appropriate cutting distance according to the characteristics (material, flexibility) and shape of the punched film. The gap X is preferably 0.5 mm to 4 mm, and more preferably 0.5 mm to 2.5 mm. As long as the effect of the present invention can be obtained, the gap is preferably smaller. This is because by reducing the gap, the punching residue can be reduced, and the product yield is improved. B. Pressing Method of Film FIG. 5 is a schematic diagram illustrating a pressing method of a film of the present invention according to an embodiment. In this embodiment, a press mechanism 300 configured by attaching the die die 100 to the base plate 200 is used. In this embodiment, after the film 500 is transferred to the cutting plate 400 disposed under the punching mechanism 300, the punching mechanism 300 is moved downward toward the film 500, or the cutting plate 400 is directed toward the punching mechanism 300. Move upward to make the die 100 abut against the film 500 (substantially, the punching blade abuts) and press in, and press the film 500 to obtain a film with a specific shape. The auxiliary blade may or may not penetrate the membrane. Preferably, the sub-knife is provided in a manner that does not penetrate the film (that is, a half-cut film). As the film used in the punching method of the present invention, any suitable film can be used. In one embodiment, an optical film is used as the film. Examples of the optical film include a polarizing plate and a retardation film. Previously, although an optical film is likely to affect its characteristics (optical characteristics) due to damage (e.g., indentation, peeling, etc.) caused by punching, according to the present invention, even an optical film as described above can suppress the damage and punch, and A film having good appearance and characteristics can be obtained. In one embodiment, a laminated film is used as a film for a press method. In the previous method, there is a problem that interlayer peeling (especially peeling at the end of the film) easily occurs in the laminated film after punching the laminated film, but according to the present invention, it is possible to suppress interlayer peeling and punch the laminated film. The thickness of the film used for the punching method is, for example, 0.15 mm to 0.45 mm. The film used for the punching method may be long or sheet. It is preferably long. In the embodiment shown in FIG. 5, when a long film is used, the following series of actions are repeated, that is, after the part to be processed is transferred to the cutting board, the transfer is temporarily stopped and punching is performed as described above. Processing. After completing one punching process, the next punched part is transported to the cutting board, and the next punching process is performed, so that all the long polarizing plates are used for punching. C. Punching device The punching device of the present invention is used for punching a film, and includes the above-mentioned die. In one embodiment, as shown in FIG. 5, the punching device of the present invention includes a punching mechanism 300 which is configured by mounting the die 100 on the base plate 200 and a cutting plate 400 which is in contact with the punching mechanism 300. They are arranged facing each other and receive the die 100 during punching. According to the punching device of this embodiment, after the film as a workpiece is placed on the cutting plate 400, the punching mechanism 300 is moved downward toward the cutting plate 400, or the cutting plate 400 is directed upward toward the punching mechanism 300. The film can be punched by moving the knife mold 100 against the polarizing plate 500. Any appropriate mechanism can be adopted as a mechanism for moving the punching mechanism and / or the cutting plate. The above-mentioned punching device can be used in combination with any appropriate transfer device (for example, a conveying belt, a transfer roller, etc.) for transferring a workpiece, and any appropriate removal device for removing punching residue after punching. [Examples] Hereinafter, the present invention will be specifically described using examples, but the present invention is not limited to these examples. [Example 1] A film was punched using a die having a punch (knife height: 1.2 mm) and an auxiliary knife (knife height: 1.12 mm) having the shape shown in FIG. 2 to obtain 24 films. As the film system, a laminated body (thickness: 219 μm) of a polarizing plate ("NZD-UFQAMEGQ1773VDUHC-ACJ" manufactured by Nitto Denko Corporation) and a protective film ("PPF-100T" manufactured by Nitto Denko Corporation) was used. [Example 2] The film used in Example 1 was punched using a die provided with a substantially rectangular punch (blade height: 1.2 mm) and a sub-knife arranged outside the four corners of the punch, And a diaphragm is obtained. As shown in FIG. 3 (a), the shape of the auxiliary knife on the outside of the corner is set to a shape along the corner of the punch and has a vertex. [Example 3] The film used in Example 1 was punched using a knife die provided with a substantially rectangular punch (blade height: 1.2 mm) and a sub-knife arranged outside the four corners of the punch, And a diaphragm is obtained. As shown in FIG. 3 (b), the shape of the auxiliary knife outside the corner is set to a shape along the corner of the punching knife and does not have a vertex (interrupted at the vertex). [Example 4] The film used in Example 1 was punched using a knife die provided with a substantially rectangular punch (blade height: 1.2 mm) and an auxiliary knife disposed outside the four corners of the punch, And a diaphragm is obtained. As shown in FIG. 3 (c), the shape of the auxiliary knife on the outer side of the corner is set as a curve shape surrounding the corner. [Example 5] The film used in Example 1 was punched using a die provided with a substantially rectangular punch (blade height: 1.2 mm) and a sub-knife arranged outside the four corners of the punch. And a diaphragm is obtained. As shown in Fig. 3 (d), the shape of the auxiliary knife on the outside of the corner is set to be a straight line, and the angle a formed by the side forming the corner and the auxiliary knife and the angle formed by the other side forming the corner and the auxiliary knife b has the same angle shape. [Comparative Example 1] A film was obtained in the same manner as in Example 1 except that the auxiliary knife was excluded from the die. [Comparative Example 2] A film was obtained in the same manner as in Example 2 except that the auxiliary knife was excluded from the die. [Evaluation 1] The appearance of the 24 films obtained in Example 1 and Comparative Example 1 was confirmed, and it was confirmed whether the length from the end of the film (the part where the punching blade abuts) has a lift of 700 μm or more (that is, lamination) Interlayer peeling of the film), and the presence or absence of an indentation with a length of 1000 μm or more from the end of the film (the part where the punching blade abuts). Table 1 shows the number of sheets of the above-mentioned raised film and the number of sheets of the above-mentioned indentation. [Table 1] [Evaluation 2] The appearance of the membranes obtained in Examples 2 to 5 and Comparative Example 2 was confirmed, and the lift from the end of the membrane (the part where the punching blade abuts) was measured (that is, the interlayer of the laminated film) was measured. Peel). The results are shown in Table 2. [Table 2]

10‧‧‧沖壓刀
20‧‧‧副刀
100‧‧‧刀模
101‧‧‧刀模
200‧‧‧基座板
300‧‧‧沖壓機構
400‧‧‧切割板
500‧‧‧膜
A‧‧‧刀高
a‧‧‧角度
B‧‧‧刀高
b‧‧‧角度
X‧‧‧間隙/頂點間距離10‧‧‧Stamping knife
20‧‧‧ Vice knife
100‧‧‧blade
101‧‧‧blade
200‧‧‧ base plate
300‧‧‧Stamping mechanism
400‧‧‧ cutting board
500‧‧‧ film
A‧‧‧Blade height
a‧‧‧angle
B‧‧‧Blade height
b‧‧‧ angle
X‧‧‧ Clearance / distance between vertices

圖1係本發明之一實施形態之刀模之概略平面圖。 圖2係本發明之一實施形態之刀模之概略平面圖。 圖3(a)至圖3(d)係本發明之一實施形態之沖壓刀及副刀之放大平面圖。 圖4係本發明之一實施形態之沖壓刀及副刀之概略剖視圖。 圖5係說明本發明之一實施形態之膜之沖壓方法之概略圖。FIG. 1 is a schematic plan view of a die set according to an embodiment of the present invention. Fig. 2 is a schematic plan view of a die set according to an embodiment of the present invention. 3 (a) to 3 (d) are enlarged plan views of a punching knife and an auxiliary knife according to an embodiment of the present invention. FIG. 4 is a schematic cross-sectional view of a punching knife and an auxiliary knife according to an embodiment of the present invention. Fig. 5 is a schematic diagram illustrating a method for punching a film according to an embodiment of the present invention.

10‧‧‧沖壓刀 10‧‧‧Stamping knife

20‧‧‧副刀 20‧‧‧ Vice knife

100‧‧‧刀模 100‧‧‧blade

Claims (10)

一種刀模，其具備：具有封閉之俯視形狀之沖壓刀，及設置於該沖壓刀之外側之副刀。A die includes a punching blade having a closed plan shape, and an auxiliary blade provided on the outer side of the punching blade. 如請求項1之刀模，其中前述副刀沿前述沖壓刀且不連續地設置。The blade die of claim 1, wherein the auxiliary knife is arranged along the aforementioned punching knife and is discontinuous. 如請求項1或2之刀模，其中前述沖壓刀之俯視形狀係具有角隅部之形狀，前述副刀至少設置於該角隅部之該沖壓刀之外側。For example, the blade die of claim 1 or 2, wherein the plan view shape of the punching blade has a shape of a corner, and the auxiliary knife is provided at least outside the punching blade of the corner. 如請求項3之刀模，其中前述副刀之俯視形狀係沿前述沖壓刀之角隅且不具有頂點之形狀。As claimed in claim 3, the plan view shape of the auxiliary knife is a shape along the corner of the punching knife and has no apex. 如請求項1或2之刀模，其中前述沖壓刀之刀高高於前述副刀之刀高。If the blade die of item 1 or 2 is requested, the blade height of the aforementioned punching knife is higher than the blade height of the aforementioned auxiliary knife. 如請求項5之刀模，其中前述沖壓刀與前述副刀之刀高之差為5 μm～700 μm。For example, the blade die of claim 5, wherein the difference between the blade height of the punching blade and the auxiliary blade is 5 μm to 700 μm. 一種膜之沖壓方法，其包含使用如請求項1至6中任一項之刀模將膜沖壓。A method of punching a film, comprising punching the film using a die as claimed in any one of claims 1 to 6. 如請求項7之膜之沖壓方法，其中前述膜係光學膜。The punching method of the film according to claim 7, wherein the aforementioned film is an optical film. 如請求項7之膜之沖壓方法，其中前述膜係偏光板。The method for punching a film according to claim 7, wherein the aforementioned film is a polarizing plate. 一種膜之沖壓裝置，其具備如請求項1至6中任一項之刀模。A punching device for a film is provided with a die according to any one of claims 1 to 6.