CN111315559A - 熔接方法及熔接装置 - Google Patents

熔接方法及熔接装置 Download PDF

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Publication number
CN111315559A
CN111315559A CN201880067382.6A CN201880067382A CN111315559A CN 111315559 A CN111315559 A CN 111315559A CN 201880067382 A CN201880067382 A CN 201880067382A CN 111315559 A CN111315559 A CN 111315559A
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Prior art keywords
welding
film
welding surface
infrared light
fusion
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CN201880067382.6A
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Inventor
生田光辉
植田敏规
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Totani Corp
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Totani Corp
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    • B29C65/14Joining or sealing of preformed parts, e.g. welding of plastics materials; Apparatus therefor by heating, with or without pressure using wave energy, i.e. electromagnetic radiation, or particle radiation
    • B29C65/16Laser beams
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    • B29C65/00Joining or sealing of preformed parts, e.g. welding of plastics materials; Apparatus therefor
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    • B29C65/16Laser beams
    • B29C65/1603Laser beams characterised by the type of electromagnetic radiation
    • B29C65/1612Infrared [IR] radiation, e.g. by infrared lasers
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    • B29C65/1403Joining or sealing of preformed parts, e.g. welding of plastics materials; Apparatus therefor by heating, with or without pressure using wave energy, i.e. electromagnetic radiation, or particle radiation characterised by the type of electromagnetic or particle radiation
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    • B29C65/1629Laser beams characterised by the way of heating the interface
    • B29C65/1632Laser beams characterised by the way of heating the interface direct heating the surfaces to be joined
    • BPERFORMING OPERATIONS; TRANSPORTING
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    • B29C65/1635Laser beams characterised by the way of heating the interface at least passing through one of the parts to be joined, i.e. laser transmission welding
    • BPERFORMING OPERATIONS; TRANSPORTING
    • B29WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
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    • B29C65/1658Laser beams characterised by the way of heating the interface scanning at least one of the parts to be joined scanning once, e.g. contour laser welding
    • BPERFORMING OPERATIONS; TRANSPORTING
    • B29WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
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    • B29C66/83General aspects of machine operations or constructions and parts thereof characterised by the movement of the joining or pressing tools
    • B29C66/836Moving relative to and tangentially to the parts to be joined, e.g. transversely to the displacement of the parts to be joined, e.g. using a X-Y table
    • BPERFORMING OPERATIONS; TRANSPORTING
    • B31MAKING ARTICLES OF PAPER, CARDBOARD OR MATERIAL WORKED IN A MANNER ANALOGOUS TO PAPER; WORKING PAPER, CARDBOARD OR MATERIAL WORKED IN A MANNER ANALOGOUS TO PAPER
    • B31BMAKING CONTAINERS OF PAPER, CARDBOARD OR MATERIAL WORKED IN A MANNER ANALOGOUS TO PAPER
    • B31B70/00Making flexible containers, e.g. envelopes or bags
    • B31B70/74Auxiliary operations
    • B31B70/81Forming or attaching accessories, e.g. opening devices, closures or tear strings
    • B31B70/813Applying closures
    • B31B70/8131Making bags having interengaging closure elements
    • B31B70/8132Applying the closure elements in the machine direction
    • BPERFORMING OPERATIONS; TRANSPORTING
    • B29WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29CSHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • B29C66/00General aspects of processes or apparatus for joining preformed parts
    • B29C66/40General aspects of joining substantially flat articles, e.g. plates, sheets or web-like materials; Making flat seams in tubular or hollow articles; Joining single elements to substantially flat surfaces
    • B29C66/47Joining single elements to sheets, plates or other substantially flat surfaces
    • B29C66/472Joining single elements to sheets, plates or other substantially flat surfaces said single elements being substantially flat
    • B29C66/4722Fixing strips to surfaces other than edge faces
    • BPERFORMING OPERATIONS; TRANSPORTING
    • B29WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29CSHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • B29C66/00General aspects of processes or apparatus for joining preformed parts
    • B29C66/90Measuring or controlling the joining process
    • B29C66/91Measuring or controlling the joining process by measuring or controlling the temperature, the heat or the thermal flux
    • B29C66/919Measuring or controlling the joining process by measuring or controlling the temperature, the heat or the thermal flux characterised by specific temperature, heat or thermal flux values or ranges
    • BPERFORMING OPERATIONS; TRANSPORTING
    • B29WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29LINDEXING SCHEME ASSOCIATED WITH SUBCLASS B29C, RELATING TO PARTICULAR ARTICLES
    • B29L2031/00Other particular articles
    • B29L2031/727Fastening elements
    • B29L2031/7282Snap fasteners, clips, press-buttons
    • BPERFORMING OPERATIONS; TRANSPORTING
    • B29WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29LINDEXING SCHEME ASSOCIATED WITH SUBCLASS B29C, RELATING TO PARTICULAR ARTICLES
    • B29L2031/00Other particular articles
    • B29L2031/727Fastening elements
    • B29L2031/729Hook and loop-type fasteners
    • BPERFORMING OPERATIONS; TRANSPORTING
    • B31MAKING ARTICLES OF PAPER, CARDBOARD OR MATERIAL WORKED IN A MANNER ANALOGOUS TO PAPER; WORKING PAPER, CARDBOARD OR MATERIAL WORKED IN A MANNER ANALOGOUS TO PAPER
    • B31BMAKING CONTAINERS OF PAPER, CARDBOARD OR MATERIAL WORKED IN A MANNER ANALOGOUS TO PAPER
    • B31B70/00Making flexible containers, e.g. envelopes or bags
    • B31B70/60Uniting opposed surfaces or edges; Taping
    • B31B70/64Uniting opposed surfaces or edges; Taping by applying heat or pressure
    • B31B70/642Uniting opposed surfaces or edges; Taping by applying heat or pressure using sealing jaws or sealing dies
    • BPERFORMING OPERATIONS; TRANSPORTING
    • B31MAKING ARTICLES OF PAPER, CARDBOARD OR MATERIAL WORKED IN A MANNER ANALOGOUS TO PAPER; WORKING PAPER, CARDBOARD OR MATERIAL WORKED IN A MANNER ANALOGOUS TO PAPER
    • B31BMAKING CONTAINERS OF PAPER, CARDBOARD OR MATERIAL WORKED IN A MANNER ANALOGOUS TO PAPER
    • B31B70/00Making flexible containers, e.g. envelopes or bags
    • B31B70/60Uniting opposed surfaces or edges; Taping
    • B31B70/64Uniting opposed surfaces or edges; Taping by applying heat or pressure
    • B31B70/644Making seals parallel to the direction of movement, i.e. longitudinal sealing

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Abstract

熔接方法利用激光束,将连续状的带状构件的熔接面进行加热。熔接方法在利用激光束将熔接面进行加热时或加热后,对带状构件及连续状的膜进行加压,将熔接面熔接于膜。熔接方法在激光束的加热前,包括:将熔接面进行预热的步骤。熔接装置包括:加热装置,包含以沿着带状构件的搬送路径而延伸的方式来配置的红外光源,将红外线照射至熔接面而利用红外线将熔接面进行加热;以及加压装置,将带状构件及膜进行加压而将熔接面熔接于膜。

Description

熔接方法及熔接装置
技术领域
本发明涉及一种熔接方法及熔接装置,用以将拉链等连续状的带状构件的熔接面熔接于连续状的塑料膜。
背景技术
包括拉链部及主体部的塑料袋已广为人知。能利用拉链部来打开塑料袋,也能关闭。拉链部通常熔接于包含塑料膜的主体部。
制造此塑料袋的制袋方法也广为人知。专利文献1、专利文献2公开了使用激光束而将拉链熔接于塑料膜的熔接方法。
这些文献中公开的熔接方法将连续状的拉链在其长度方向搬送,另外,连续状的塑料膜也在其长度方向搬送。熔接方法一边搬送拉链,一边将激光束对拉链的熔接面进行点照射,利用激光束将熔接面进行加热而使其熔融。
熔接方法在熔接面的熔融后,将拉链及膜引导至一对加压辊间而使拉链及膜相互重合,利用一对加压辊将拉链及膜进行加压。通过此加压,拉链的熔接面熔接于膜。
激光束的点照射中,拉链的熔接面仅在通过激光束的期间被激光束照射。因此,若拉链高速地搬送,则当然,拉链的熔接面仅在一瞬间被激光束照射,未经充分加热。结果,有时会产生拉链与膜的熔接不良。
现有技术文献
专利文献
专利文献1:日本专利特开2015-123644号公报
专利文献2:日本专利特开2017-47622号公报
发明内容
发明所要解决的问题
本发明的第一实施例提供一种熔接方法,在拉链等连续状的带状构件高速地搬送时,也能够将带状构件的熔接面稳定地熔接于连续状的膜。本发明的第二实施例提供一种适合于实施所述熔接方法的熔接装置。
解决问题的技术手段
根据本发明的第一实施例,提供一种熔接方法,一边将包括至少一个熔接面的连续状的带状构件在其长度方向搬送,一边将熔接面进行加热而熔融,将熔接面溶解于包含塑料的至少一片连续状的膜。熔接方法一边将带状构件在其长度方向搬送,一边利用至少一个加热源将熔接面进行加热。熔接方法利用加热源将熔接面进行加热后,一边将带状构件在其长度方向搬送,一边将至少一个激光束照射至熔接面,利用激光束将熔接面进一步加热。熔接方法在利用激光束将熔接面进一步加热时或加热后,一边将带状构件及膜以相互重合的状态来搬送,一边对带状构件及膜进行加压而将熔接面熔接于膜。
熔接方法可在利用激光束将熔接面进一步加热时,对带状构件及膜进行加压而将熔接面熔接于膜。
加热源可放射出多波长的红外线的红外光源。红外光源可沿着带状构件的搬送路径而延伸。
熔接方法可向熔接面照射红外线,利用红外线将熔接面进行加热。熔接方法可将红外线,从熔接面侧照射至熔接面,也可从与熔接面相反的一侧照射至熔接面。熔接方法也可使红外线透过重叠于带状构件的膜而照射至熔接面。
当熔接面由加热源进行加热时,带状构件及膜可以相互重合的状态来搬送。
带状构件可包括:包含熔接面的基部、以及在与熔接面相反的一侧从基部突出的嵌合部。熔接方法可将包括沿着带状构件的搬送路径而延伸的引导槽的导件,调整为40℃以上、100℃以下的范围内的温度。进而,熔接方法可在利用加热源将熔接面进行加热时,将嵌合部容纳于引导槽,抑制带状构件在其宽度方向移动。
熔接方法可从鼓起的弯曲面的下游,对带状构件及膜赋予张力,使带状构件及膜卡合于弯曲面,挤压于弯曲面,对弯曲面进行加压而将熔接面熔接于膜。
带状构件可包含第一熔接面及第二熔接面来作为熔接面。可使用第一膜及第二膜来作为膜。可使用第一加热源及第二加热源来作为加热源。可使用第一激光束及第二激光束来作为激光束。熔接方法可一边将带状构件在其长度方向搬送,一边利用第一加热源将第一熔接面进行加热,并且利用第二加热源将第二熔接面进行加热。熔接方法可在使用第一加热源及第二加热源将第一熔接面及第二熔接面进行加热后,一边将带状构件在其长度方向搬送,一边将第一激光束照射至第一熔接面,利用第一激光束将第一熔接面进一步加热,并且将第二激光束照射至第二熔接面,利用第二激光束将第二熔接面进一步加热。熔接方法可在利用第一激光束及第二激光束将第一熔接面及第二熔接面进行加热时或者加热后,一面将带状构件、以及第一膜及第二膜以带状构件由第一膜及第二膜所夹持的状态来搬送,一边进行加压而将第一熔接面熔接于第一膜,并且将第二熔接面溶解于第二膜。
根据本发明的第二实施例,提供一种熔接装置,当包括至少一个熔接面的连续状的带状构件在其长度方向搬送时,将熔接面进行加热而熔融,将熔接面熔接于至少一片连续状的膜。熔接装置包括加热装置,所述加热装置包含以沿着带状构件的搬送路径而延伸的方式来配置且放射出红外线的至少一个红外光源,对在长度方向搬送的带状构件的熔接面照射红外线,利用红外线将熔接面进行加热。熔接装置包括加压装置,所述加压装置对以相互重合的状态在长度方向搬送的带状构件及膜进行加压,将利用加热装置来加热的熔接面熔接于膜。
红外光源可放射出多波长的红外线的红外光源。红外光源为卤素灯(halogenlamp)、康泰尔加热器(Kanthal heater)、陶瓷加热器(ceramic heater)、或者红外发光二极管(light emitting diode,LED)。
熔接装置可还包括激光装置,所述激光装置包含放射出激光束的至少一个激光光源,将激光束照射至在长度方向搬送的带状构件的熔接面,将利用加热装置来加热的熔接面利用激光束来进一步加热而熔融。
带状构件可包括:包含熔接面的基部、以及在与熔接面相反的一侧从基部突出的嵌合部。加热装置可还包括:包含引导槽的导件,所述引导槽沿着带状构件的搬送路径而延伸,在利用红外线将熔接面进行加热时容纳嵌合部;以及调整装置,将导件调整为40°以上、100°以下的范围内的温度。
带状构件可包含第一熔接面及第二熔接面来作为熔接面。加热装置可包含第一红外光源及第二红外光源来作为红外光源。第一红外光源及第二红外光源以带状构件的搬送路径为间隔而彼此相向来配置。加热装置利用第一红外光源将第一熔接面进行加热,且利用第二红外光源将第二熔接面进行加热。
加压装置可包括:卡合构件,包含鼓起的弯曲面;以及张力赋予机构,从弯曲面的下游对带状构件及膜赋予张力,使带状构件及膜卡合于弯曲面,挤压于弯曲面。红外光源的下游部分可与弯曲面相向。
附图说明
图1概略性地表示一实施方式的熔接装置。
图2表示图1的加热装置的与带状构件的搬送方向垂直的剖面。
图3A表示带状构件的一例的横截面,图3B表示带状构件的另一例的横截面,图3C例示激光束的光束形状与带状构件的熔接面的关系。
图4概略性地表示本发明的另一实施方式的熔接装置。
图5表示图4的加热装置的与带状构件的搬送方向成直角的剖面。
图6A表示带状构件的另一例的横截面,图6B表示又一例的横截面。
图7A概略性地表示另一实施方式的熔接装置,图7B部分性地表示熔接装置。
图8表示图7A的加热装置的与带状构件的搬送方向垂直的剖面。
图9A、图9B部分且概略性地表示另一实施方式的熔接装置。
图10A、图10B表示另一实施方式的加热装置的与带状构件的搬送方向成直角的部分剖面。
具体实施方式
以下,参照附图,对本发明的实施方式的熔接方法及熔接装置进行说明。各实施方式中,尽可能省略同一或类似的构成的说明。
[第一实施方式]
参照图1,熔接装置安装于制袋机。制袋机利用包含熔接面100的连续状的带状构件1、以及包含塑料的连续状的膜2来制造塑料袋。
带状构件1是包括熔接面100的连续状的条带,所述熔接面100能熔接于膜2且具有比膜2的宽度狭窄的宽度。本实施方式中,带状构件1是包含塑料的图3A所示的拉链的公构件或者图3B所示的拉链的母构件。因此,实施方式的带状构件1包括基部10及嵌合部11。基部10包括:平坦的熔接面100、以及位于与熔接面100相反的一侧的平坦的相反面101。嵌合部11从相反面101突出。图3A的公构件的嵌合部11、与图3B的母构件的嵌合部11相互拆装自如地嵌合。
如图1那样,制袋机包括未图示的进给机构。进给机构例如包含进给辊。带状构件1利用进给机构而在其长度方向(连续方向)搬送。符号Y表示带状构件1的搬送方向。膜2也利用进给机构而在其长度方向(连续方向)搬送。熔接装置将在长度方向搬送的带状构件1的熔接面100进行加热而熔融,然后,将熔接面100熔接于膜2。
熔接装置包括加热装置3。加热装置3包含放射出红外线的红外光源30,来作为用以将熔接面100进行加热的加热源。加热装置3利用红外光源30,将在其长度方向搬送的带状构件1的熔接面100进行加热。
红外光源30以沿着带状构件1的搬送路径G(图1)而延伸的方式来配置。红外光源30并非如激光束那样的单波长的红外线,而是放射出多波长的(包含广范围的波长区域)红外线。红外光源30为卤素灯、康泰尔加热器、陶瓷加热器、红外LED等。
图2概略性地表示与带状构件1的搬送方向Y正交的加热装置3的剖面。如图2那样,加热装置3还包括包含聚光面310的聚光区块31(图1中省略)。聚光区块31由一对支撑体32支撑。聚光面310形成为凹陷的曲面,沿着搬送路径G(图1)而延伸。红外光源30配置于由聚光面310所包围的空间内。加热装置3包含透过红外线的材料,还包括由支撑体32支撑的透过板33。
红外线从红外光源30放射出,由聚光面310反射,从透过板33透过,聚光于与红外光源30相距距离L的位置。因此,在与红外光源30相距距离L的位置,加热能量最强。加热装置3构成为带状构件1当在其长度方向(即,搬送方向Y)搬送而通过加热装置3时,其熔接面100与红外光源30相距距离L而与红外光源30相向。因此,加热装置3将红外线照射至被搬送的带状构件1的熔接面100,利用红外线将熔接面100进行加热。实施方式中,带状构件1在熔接面100侧的表层包括吸收红外线的红外线吸收层。
加热装置3还包括导件34,所述导件34包含沿着搬送路径G而延伸的引导槽340。导件34与红外光源30相向而配置。带状构件1在红外光源30与导件34之间搬送。此时,带状构件1的嵌合部11容纳于引导槽340中,由引导槽340的相向面341所夹持。因此,通过引导槽340容纳嵌合部11,能够抑制带状构件1在其宽度方向X晃动。
加热装置3还包含调整导件34的温度的调整装置35。调整装置35包含加热器等。调整装置35将导件34调整为40℃以上、100℃以下的范围内的温度。
如图1那样,熔接装置还包括激光装置4。激光装置4在加热装置3的下游,对被搬送的带状构件1的熔接面100点照射激光束40,将已由加热装置3所加热的熔接面100,利用激光束40来进一步加热而熔融。例如与专利文献1同样,激光装置4包括激光光源41、及光学系统42等。这些构件收纳于壳体43。激光光源41放射出激光束40。实施方式中,激光束40为红外线。光学系统41以激光束40具有所期望的光斑直径的方式形成激光束40。
如图3C那样,光束形状400可在照射位置为椭圆形。其也可为圆形。激光束40例如以其光束形状400包含熔接面100的宽度整体的方式来照射,实现熔接面100遍及宽度方向X整体而熔接。
如图1那样,熔接装置还包括加压装置5。加压装置5对以相互重叠的状态在搬送方向Y搬送的带状构件1及膜2进行加压。
加压装置5配置于比激光束40的照射位置更下游,包含彼此相向的一对加压辊50、50。膜2利用导辊60而引导至加压辊50,且被引导至加压辊50、加压辊50间。带状构件1也被引导至加压辊50、加压辊50间。借此,带状构件1及膜2相互重叠,熔接面100与膜2接触。而且,带状构件1及膜2以相互重叠的状态在搬送方向Y搬送,从一对加压辊50、50间通过。此时,带状构件1及膜2由一对加压辊50、50来加压。
对使用熔接装置,将带状构件1的熔接面100溶解于膜2的熔接方法进行说明。当带状构件1在其长度方向搬送而通过加热装置3时,熔接面100由作为加热源的红外光源30来加热。即,红外线向被搬送的带状构件1的熔接面100照射,利用红外线将熔接面100进行加热。
如图2那样,当带状构件1的熔接面100利用红外光源30来加热时,嵌合部11容纳于导件34的引导槽340,抑制带状构件1在其宽度方向X移动。进而,此时,导件34利用调整装置35,而调整为40°以上、100°以下的范围内的适当温度。
继而,当带状构件1在其长度方向搬送时,激光束40从加热装置3的下游,由激光装置4照射至熔接面100。已由红外光源30所加热的熔接面100利用激光束40进一步加热而熔融。
当熔接面100由激光束40加热后,带状构件1及膜2相互重叠,向加压装置5搬送。带状构件1及膜2当以相互重合的状态搬送时,由加压装置5(即一对加压辊50、50)来加压。其结果为,熔融的熔接面100熔接于膜2。
如以上所述,熔接面100在由激光束40进行加热之前,由加热装置3进行预热。因此,即便带状构件1高速地搬送时,带状构件1(熔接面100)对膜2的稳定熔接也得到保障。其结果为,还能够提高制袋速度。
作为加热源的红外光源30以沿着搬送路径G而延伸的方式来配置。因此,即便带状构件1高速地搬送时,也能够确保充分的预热时间。带状构件1对膜2的熔接进一步稳定。
通过预热步骤,熔接面100的充分的熔融状态得到保障。因此,即便加压装置5对带状构件1及膜2加压时的加压力弱,也保障稳定的熔接。
激光束40的能量被熔接面100侧的红外线吸收层(表层)瞬时吸收、蓄积,仅表层瞬时发热。随着时间的经过,热能量从表层向带状构件1的深度方向传递。带状构件1的搬送速度越高,在带状构件1及膜2被加压之前,向带状构件1的深度方向传递的热能量越被限制。因此,若为仅通过激光束40的点照射而蓄积于表层的能量,有时对熔接而言并不充分,会产生熔接不良。与此相对,实施方式中,在激光束40的点照射之前,熔接面10由加热装置3来预热足够的时间,热能量向带状构件1的深度方向充分传递。因此,能够避免熔接不良的问题。
导件34抑制带状构件1在宽度方向X移动,借此,防止红外光源30与熔接面100在宽度方向X,相对地大幅度偏移。但,由于在引导槽340的侧壁341与嵌合部11之间需要游隙,故而搬送中的带状构件1在宽度方向X稍微晃动的情况不可避免。当仅通过激光束40的点照射来进行熔接时,即便带状构件1相对于激光束40而稍微晃动,也容易产生熔接不良。与此相对,实施方式中,带状构件1由于利用红外线的加热及传热,而均匀地预热足够的时间,因此即便带状构件1稍微晃动,也不会产生熔接不良。
如此一来,使用加热装置3的预热步骤使仅通过激光束40的点照射而将熔接面100熔接时产生的问题消除。
导件34被调整为适当温度。因此,能够更高效地将熔接面100预热。
使用放射出多波长的红外线的红外光源30。此种红外光源30能够自由地设计其形状及大小。激光光源的信息常常被设为企业机密,但与此相对,如上所述的红外光源30的信息是已知的。因此,用户方能够自由地设计红外光源30及其光学系统,简单地设定所期望的照射强度及加热时间。借此,还带来了带状构件1对膜2的稳定熔接。
优选为对熔接面100的全部或一部分实施红外线吸收处理,另一方面,对嵌合部11整体不实施红外线吸收处理。其原因在于,若嵌合部11吸收红外线,则存在变形而嵌合不良的可能性。借此,熔接面100能够高效地吸收红外线,并且能够避免嵌合部11由于过热而变形的风险。
在嵌合部11不吸收红外线的情况下,熔接面100也利用加热装置3进行长时间加热,因此无法避免嵌合部11通过传热而加热。然而,由于导件34经调整为适当温度,故而能够使热从嵌合部11散发至导件34,能够防止嵌合部11的过热。
[第二实施方式]
如图4那样,此实施方式中,在加热装置3的上游配置有导辊60。带状构件1由导辊60所引导,以其熔接面100与膜2接触的方式重叠于膜2。因此,带状构件1及膜2以相互重叠的状态来搬送而通过加热装置3。
图5表示与搬送方向Y正交的加热装置3的剖面。如图5那样,当带状构件1通过加热装置3时,嵌合部11与红外光源30相向。因此,红外线从与熔接面100相反的一侧,通过基部10而照射至熔接面100。在带状构件1的熔接面100侧设置有红外吸收层,通过此吸收层吸收红外线而加热。导件34包含透过红外线的材料,且由支撑体32支撑。红外线通过导件34而向熔接面100照射。导件34包含彼此相向的一对引导构件342、342,引导构件342、引导构件342在其间规定引导槽340。
以红外光源30对熔接面100的加热能量在带状构件1的搬送方向Y,朝向激光束40的照射位置而逐渐增强的方式,构成加热装置3。具体而言,加热装置3(红外光源30及聚光区块31)倾斜而配置,以使在加热装置3(红外光源30)的下游端位置,熔接面100与红外光源30的距离最接近红外线的会聚距离L(图5),对熔接面100进行最强烈的加热。
如图4那样,加压装置5包括卡合构件51、及张力赋予机构52,来代替一对加压辊50、50(图1)。
卡合构件51包括鼓起的弯曲面510。弯曲面510形成于卡合构件51的下游部分。弯曲面510位于加热装置3的下游。弯曲面510与加热装置3的相对位置可以弯曲面510的上游部分由加热装置3进行加热的方式来调整。
张力赋予机构52从弯曲面510的下游,对带状构件1及膜2赋予张力,使带状构件1及膜2卡合于弯曲面510,挤压于弯曲面510。
张力赋予机构52在实施方式中,配置于卡合构件51的下游,包括将带状构件1及膜2加以引导的导辊520、导辊520。张力赋予机构52包括未图示的引导机构。导辊520、导辊520能利用引导机构来调整其位置。以带状构件1及膜2挤压于弯曲面510的方式,带状构件1的搬送方向Y通过导辊520、导辊520的位置调整来调整。
弯曲面510优选为由对于带状构件1或膜2的动摩擦系数小的材料来形成。另外,优选为对弯曲面510实施镜面加工或特氟龙(注册商标)加工等表面处理,来减少带状构件1/膜2与弯曲面510之间的动摩擦力。另外,也可通过将加热器等调整装置53(图4)埋入卡合构件51,来对弯曲面510进行温度调整。因为通过这些,能实施更高效的熔接。
激光装置4构成为能利用未图示的引导机构来调整其位置。通过激光装置4的位置调整,能够将激光束40的照射位置设定于加压装置5的加压位置。借此,激光装置4能够将激光束40照射至最佳挤压力的位置。实施方式中,激光装置4调整位置,以使在弯曲面510的上游部分,将激光束40通过带状构件1的基部10而向熔接面100照射。
对熔接方法进行说明。在加热装置3的上游,带状构件1以其熔接面100与膜2接触的方式重合于膜2。
继而,当带状构件1及膜2以相互重合的状态来搬送而通过加热装置3时,熔接面100由红外光源30来加热。即,红外线通过带状构件1的基部10而向熔接面100照射,利用红外线而将熔接面100进行加热。此时,嵌合部11容纳于引导槽340,抑制带状构件1在其宽度方向X移动。
在熔接面100已由加热装置3(红外光源30)进行加热后,当带状构件1及膜2以相互重叠的状态在其长度方向搬送时,激光束40在弯曲面510中照射至熔接面100,熔接面100利用激光束40进一步加热而熔融。
当熔接面100由激光束40加热时,带状构件1及膜2由加压装置5进行加压。即,被搬送的带状构件1及膜2利用张力赋予机构52,从弯曲面510的下游赋予张力,卡合于弯曲面510,挤压于弯曲面510,在弯曲面510上被加压。其结果为,熔接面100在弯曲面510上熔接于膜2。
此实施方式中,也能通过预热步骤,以与第一实施方式相同的方式,将带状构件1稳定地熔接于膜2。
由于加压装置5在不使用一对加压辊50、50的情况下,对带状构件1及膜2进行加压,故而能够比较自由地配置激光装置4。例如,也可以激光束40在弯曲面510中,直角地(即无焦点模糊)照射至熔接面100的方式,来配置激光装置4。借此,能够将其能量高效地传递至熔接面100。第一实施方式中,在带状构件1及膜2被加压之前,熔接面100由激光束40来加热而熔接。与此相对,本实施方式中,当带状构件1及膜2被加压时,能够利用激光束40将熔接面100进行加热而熔接。即,能够将激光束40的照射位置设定于加压装置5对带状构件1及膜2进行加压的加压位置,熔接方法能够同时在相同位置实施利用激光束40的熔接面100的加热以及利用加压装置5的带状构件1及膜2的加压。
根据制袋机的情况,当带状构件1及膜2的搬送暂时停止时,第一实施方式中,在从激光束40的照射位置至加压辊50、加压辊50的加压位置为止的区间中,已被熔融的熔接面100有时会恢复为固体状态。因此,当带状构件1及膜2的搬送再开始时,在所述区间中经冷却的熔接面100即便被加压也不会熔接于膜2。然而,在本实施方式中,由于同时实施加热及加压,故而能够避免此问题。
此实施方式中,利用加热装置3进行预热后,即刻同时实施利用激光装置4的加热以及利用加压装置5的加压。因此,第一实施方式中,虽存在热从拉链1散发到从加热装置3的下游端至激光束40的照射位置为止的区间中的顾虑,但在第二实施方式中能够避免此问题。
由于加热装置3适当倾斜而配置,故而能够将熔接面100遍及长区间而稳定且均匀地加热,能够提高熔接的质量。
[第三实施方式]
图6A表示本实施方式中使用的带状构件1。带状构件1是包括相互以可拆装的方式嵌合的公构件1a及母构件1b的拉链。带状构件1在公构件1a及母构件1b相互嵌合的状态下在其长度方向搬送。
图6A中,公构件1a包括:包含第一熔接面100a的第一基部10a、以及在与第一熔接面100a相反的一侧从第一基部10a突出的第一嵌合部11a。母构件1b包括:包含第二熔接面100b的第二基部10b、以及在与第二熔接面100a相反的一侧从第二基部10b突出突出的第二嵌合部11b。与其它实施方式同样,带状构件1可在熔接面100a、熔接面100b的表层包括红外线吸收层,或者可对熔接面100a、熔接面100b的全部或者一部分实施红外线吸收处理。
实施方式的带状构件1由于以公构件1a及母构件1b相互嵌合的状态来搬送,故而容易倒塌。为了防止此情况,公构件1a及母构件1b优选为如图6A那样为厚壁形状。进而,为了防止此情况,也可如图6B那样,公构件1a及母构件1b以朝向熔接面100a、熔接面100b而宽度变广的方式,包括倾斜面102a、倾斜面102b。
如图7A那样,加热装置3包括:作为第一加热源的第一红外光源30a、以及作为第二加热源的第二红外光源30b。第一及第二红外光源30a、30b与所述实施方式的红外光源30相同。第一及第二红外光源30a、30b以将带状构件1的搬送路径作为间隔而彼此相向的方式来配置。因此,带状构件1以从第一及第二红外光源30a、30b之间通过的方式来搬送。如图8那样,聚光区块31、支撑体32及透过板33以与其它实施方式相同的方式,对第一及第二红外光源30a、30b分别设置。
如图7A那样,激光装置4包括:放射出第一激光束40a的第一激光光源41a及放射出第二激光束40b的第二激光光源41b。这些光源与所述实施方式的激光光源40相同。光学系统42及壳体43对第一及第二激光光源41a、41b分别设置。
如图7B那样,第一激光束40a在加热装置3的下游照射至第一熔接面100a。第二激光束40b在加热装置3的下游照射至第二熔接面100b。第一及第二激光束40a、40b以其照射位置与加压装置5的加压位置之间的区间S尽可能缩小的角度,而从带状构件1的两侧照射至第一及第二熔接面100a、100b。
加热装置5与第一实施方式同样,包括配置于第一及第二激光束40a、40b的照射位置的下游的一对加压辊50、50。
以下,对熔接方法进行说明。公构件1a及母构件1b相互嵌合的状态的带状构件(拉链)1在其长度方向搬送而通过加热装置3。此时,红外线从第一红外光源30a照射至第一熔接面100a,第一熔接面100a由红外线进行加热。同时,红外线从红外光源30b照射至第二熔接面100b,第二熔接面100b由红外线进行加热。此外,如图8那样,带状构件1以由两个透过板33、33夹持的状态进行加热且搬送。
继而,当带状构件1在其长度方向搬送时,第一激光束40a照射至第一熔接面100a,第一熔接面100a由第一激光束40b进一步加热而熔融。同时,第二激光束40b照射至第二熔接面100b,第二熔接面100b由第二激光束40b进一步加热而熔融。
第一及第二熔接面100a、100b由第一及第二激光束40a、40b进行加热后,向一对加压辊50、50间搬送。第一及第二膜2a、2b缠绕于加压辊50、加压辊50,引导至加压辊50、加压辊50之间。带状构件1、以及第一及第二膜2a、2b以带状构件1由第一及第二膜2a、2b所夹持的方式相互重叠。此时,第一熔接面100a与第一膜2a接触,第二熔接面100b与第二膜2b接触。
带状构件1、以及第一及第二膜2a、2b以相互重合的状态来搬送时,由加压装置5(一对加压辊50、50)进行加压。由此,第一熔接面100a熔接于第一膜2a,第二熔接面100b熔接于第二膜2b。
如以上所述,第三实施方式将包括第一及第二熔接面100a、100b的带状构件1同时溶解于第一及第二膜2a、2b。通过预热步骤来保障第一及第二熔接面100a、100b的熔融,这与其他实施方式相同。因此,带状构件1对第一及第二膜2a、2b的稳定熔接得到保障。
此外,带状构件1、以及第一及第二膜2a、2b也可不在加热装置3的下游,而是在加热装置3的上游相互重合,以此状态来搬送而通过加热装置3。在此情况下,利用加热装置3,红外线从第一红外光源30a透过第一膜2a而照射至第一熔接面100a,从第二红外光源30b透过第二膜2b而照射至第二熔接面100b。继而,在加热装置3的下游位置,第一激光束40a透过第一膜2a而照射至第一熔接面100a,第二激光束40b透过第二膜2b而照射至第二熔接面100b。因此,使用包含使红外光源30a、红外光源30b的红外线以及激光束40a、激光束40b透过的材料的膜2a、膜2b。
[第四实施方式]
第四实施方式提供一种熔接装置。根据所述实施方式而了解到,包括红外光源的熔接装置适合于实施所述熔接方法。但,也能够通过仅利用红外光源的加热来使熔接面熔融。即,第四实施方式的熔接装置包括加热装置3及加压装置5,且不包括激光装置。
例如,如图9A那样,实施方式的熔接装置可包括与第二实施方式同样的加热装置3及加压装置5。当带状构件1与膜2一起在其长度方向搬送时,加热装置3从红外光源30对熔接面10照射红外线,仅利用红外线来将熔接面100进行加热而熔融。加压装置5对以相互重合的状态来搬送的带状构件1及膜2进行加压,将熔接面100熔接于膜2。如此一来,此实施方式的熔接装置在不使用激光束的情况下,提供带状构件1对膜2的稳定熔接。此外,熔接装置可包括与第一或第三实施方式同样的加热装置3及加压装置5。
以上,虽已对本发明的优选实施方式进行说明,但本发明并不限定于所述实施方式。
第二实施方式中,红外光源30以使红外线通过带状构件1的内部而照射至熔接面100的方式来配置。除此以外,红外光源30可以使红外线透过与带状构件1重叠的膜2而照射至熔接面100的方式来配置。在此情况下,只要将带状构件1与膜2的排列加以更换,而且随之变更导件34(图5)的配置即可。在此情况下,使用包含使红外光源30的红外线透过的材料的膜2。进而,同样可使用包含使激光束40透过的材料的膜2,激光束40透过与带状构件1重合的膜2而照射至熔接面100。
如图10A那样,在使用包括公构件1a及母构件1b的拉链来作为带状构件1的第三实施方式中,加热装置3可包括包含引导槽340的导件34。导件34包括相向配置且在其间规定引导槽340的一对引导构件342、342。带状构件1容纳于引导槽340,一边由其两侧的引导构件342、引导构件342来引导一边搬送。
如图10B那样,也可设置包含使红外线透过的材料的导件34。导件34包括引导孔343,所述引导孔343沿着带状构件1的搬送路径而延伸,将所搬送的带状构件1的周围整体容纳。导件34包括分别包含引导槽的一对引导构件342、342,引导孔343由两个引导槽的组合来规定。带状构件1的周围整体容纳于引导孔343,一边引导一边搬送。
如图7B那样,第三实施方式的加热装置3可包括保温机构36,所述保温机构36防止在从红外光源30a、红外光源30b的下端至激光束40a、激光束40b的照射位置为止的区间内,带状构件1冷却。保温机构36例如在从红外光源30a、红外光源30b的下端至激光束40a、激光束40b的照射部位为止的区间内,包括沿着带状构件1的搬送路径而延伸的一对保温构件360、360。一对保温构件360、360将搬送中的带状构件1从其熔接面100a、熔接面100b侧夹持而将带状构件1保温。保温机构36可具有其它构成。
在第三及第四实施方式中,也与第二实施方式同样,也可以熔接面100(100a、100b)与红外光源30(30a、30b)的距离在搬送方向Y,逐渐接近距离L(图5)的方式,将加热装置3倾斜而配置。借此,如上所述,熔接的质量提高。
如图9A或图9B那样,第四实施方式的红外光源30也可以其下游部分与弯曲面510相向的方式来配置。因此,熔接装置在将带状构件1及膜2在弯曲面510上加压时,能够将红外线在弯曲面510上照射至熔接面100,利用红外线将熔接面100进行加热。
第四实施方式的红外光源30可以其下游部分与弯曲面510相向,且红外光源30与弯曲面510的距离成为一定距离L(图5)的方式,具有与弯曲面510对应的形状。借此,当带状构件1与膜2被加压于弯曲面510时,能够利用加热装置3,将熔接面100在弯曲面510上强烈地加热。
各实施方式中,聚光区块31由红外光源30进行加热,因此优选为使用冷却装置来冷却。
各实施方式中,加热装置3的配置并不限定于所述。加热装置3能以对熔接面100的加热能量沿着带状构件1的搬送方向Y而成为预期的分布的方式,适当倾斜或向下游移动而配置。
各实施方式中,带状构件1为拉链的公构件、拉链的母构件或者拉链。除此以外,带状构件1也可以是:粘扣带(hook and loop fastener)的公构件、粘扣带的母构件、包含相互卡合的公构件及母构件的粘扣带、粘着胶带、密封胶带、胶带状的增强材料、胶带状的装饰材料、袋子的胶带状接头等。带状构件优选为对塑料袋赋予某些功能的构件。
符号的说明
1:带状构件
100、100a、100b:熔接面
2、2a、2b:膜
3:加热装置
30、30a、30b:红外光源(加热源的一例)
34:导件
340:引导槽
4:激光装置
40、40a、40b:激光束
41、41a、41b:激光光源
5:加压装置
50:加压辊
51:卡合构件
510:弯曲面
52:张力赋予机构
Y:带状构件的搬送方向(长度方向)
X:带状构件的宽度方向
G:带状构件的搬送路径

Claims (19)

1.一种熔接方法,一边将具有至少一个熔接面的连续状的带状构件在其长度方向搬送,一边将所述熔接面进行加热而熔融,将所述熔接面熔接于包含塑料的至少一片连续状的膜,所述熔接方法的特征在于,包括:
一边将所述带状构件在其长度方向搬送,一边利用至少一个加热源将所述熔接面进行加热;
利用所述加热源将所述熔接面进行加热后,一边将所述带状构件在其长度方向搬送,一边将至少一个激光束对所述熔接面照射,利用所述激光束将所述熔接面进一步加热;以及
在利用所述激光束将所述熔接面进一步加热时或者加热后,一边将所述带状构件及所述膜以相互重合的状态来搬送,一边对所述带状构件及所述膜进行加压而将所述熔接面熔接于所述膜。
2.根据权利要求1所述的熔接方法,其特征在于,
当利用所述激光束将所述熔接面进一步加热时,对所述带状构件及所述膜进行加压而将所述熔接面熔接于所述膜。
3.根据权利要求1所述的熔接方法,其特征在于,
所述加热源为放射出多波长的红外线的红外光源,且
所述熔接方法将所述红外线对所述熔接面照射,利用所述红外线将所述熔接面进行加热。
4.根据权利要求3所述的熔接方法,其特征在于,
所述红外光源沿着所述带状构件的搬送路径而延伸。
5.根据权利要求3所述的熔接方法,其特征在于,
将所述红外线从所述熔接面的一侧照射至所述熔接面。
6.根据权利要求3所述的熔接方法,其特征在于,
将所述红外线从与所述熔接面相反的一侧照射至所述熔接面。
7.根据权利要求3所述的熔接方法,其特征在于,
使所述红外线透过重叠于所述带状构件的所述膜而照射至所述熔接面。
8.根据权利要求1所述的熔接方法,其特征在于,
当所述熔接面被所述加热源加热时,所述带状构件及所述膜以相互重合的状态来搬送。
9.根据权利要求1所述的熔接方法,其特征在于,
所述带状构件包括:
基部,具有所述熔接面;以及
嵌合部,在与所述熔接面相反的一侧从所述基部突出,并且
所述熔接方法将具有沿着所述带状构件的搬送路径而延伸的引导槽的导件,调整为40℃以上、100℃以下的范围内的温度,
当利用所述加热源将所述熔接面进行加热时,将所述嵌合部容纳于所述引导槽,抑制所述带状构件在其宽度方向移动。
10.根据权利要求1所述的熔接方法,其特征在于,
所述熔接方法从鼓起的弯曲面的下游,对所述带状构件及所述膜赋予张力,使所述带状构件及所述膜卡合于所述弯曲面,挤压于所述弯曲面,对所述弯曲面加压而将所述熔接面熔接于所述膜。
11.根据权利要求1所述的熔接方法,其特征在于,
所述带状构件包含第一熔接面及第二熔接面来作为所述熔接面,
使用第一膜及第二膜来作为所述膜,
使用第一加热源及第二加热源来作为所述加热源,
使用第一激光束及第二激光束来作为所述激光束,并且
所述熔接方法一边将所述带状构件在其长度方向搬送,一边利用所述第一加热源将所述第一熔接面进行加热,并且利用所述第二加热源将所述第二熔接面进行加热;
使用所述第一加热源及所述第二加热源将所述第一熔接面及所述第二熔接面进行加热后,一边将所述带状构件在其长度方向搬送,一边将所述第一激光束对所述第一熔接面照射,利用所述第一激光束将所述第一熔接面进一步加热,并且将所述第二激光束照射至所述第二熔接面,利用所述第二激光束将所述第二熔接面进一步加热;
利用所述第一激光束及所述第二激光束将所述第一熔接面及所述第二熔接面进一步加热时或者加热后,一边将所述带状构件、以及所述第一膜及所述第二膜,以所述带状构件由所述第一膜及所述第二膜夹持的状态来搬送,一边进行加压而将所述第一熔接面熔接于所述第一膜,并且将所述第二熔接面熔接于所述第二膜。
12.一种熔接装置,当具有至少一个熔接面的连续状的带状构件在其长度方向搬送时,将所述熔接面进行加热而熔融,将所述熔接面熔接于包含塑料的至少一片连续状的膜,所述熔接装置的特征在于,包括:
加热装置,包含以沿着所述带状构件的搬送路径而延伸的方式来配置且放射出红外线的至少一个红外光源,对在所述长度方向搬送的所述带状构件的所述熔接面照射所述红外线,利用所述红外线将所述熔接面进行加热;以及
加压装置,对以相互重合的状态在所述长度方向搬送的所述带状构件及所述膜进行加压,将已由所述加热装置来加热的所述熔接面熔接于所述膜。
13.根据权利要求12所述的熔接装置,其特征在于,
所述红外光源为放射出多波长的红外线的红外光源。
14.根据权利要求12所述的熔接装置,其特征在于,
所述红外光源为卤素灯、康泰尔加热器、陶瓷加热器、或者红外发光二极管。
15.根据权利要求12所述的熔接装置,其特征在于,还包括:
激光装置,
所述激光装置包含放射出激光束的至少一个激光光源,将所述激光束照射至在所述长度方向搬送的所述带状构件的所述熔接面,将已由所述加热装置来加热的所述熔接面,利用所述激光束来进一步加热而熔融。
16.根据权利要求12所述的熔接装置,其特征在于,
所述带状构件包含:
基部,具有所述熔接面;以及
嵌合部,在与所述熔接面相反的一侧从所述基部突出,并且
所述加热装置还包括:
具有引导槽的导件,所述引导槽沿着所述带状构件的搬送路径而延伸,在利用所述红外线将所述熔接面进行加热时容纳所述嵌合部;以及
调整装置,将所述导件调整为40°以上、100°以下的范围内的温度。
17.根据权利要求12所述的熔接装置,其特征在于,
所述带状构件包含第一熔接面及第二熔接面来作为所述熔接面,
所述加热装置包含第一红外光源及第二红外光源来作为所述红外光源,
所述第一红外光源及所述第二红外光源以所述带状构件的搬送路径为间隔而彼此相向来配置,并且
所述加热装置利用所述第一红外光源将所述第一熔接面进行加热,且利用所述第二红外光源将所述第二熔接面进行加热。
18.根据权利要求12所述的熔接装置,其特征在于,
所述加压装置包括:
卡合构件,包含鼓起的弯曲面;以及
张力赋予机构,从所述弯曲面的下游对所述带状构件及所述膜赋予张力,使所述带状构件及所述膜卡合于所述弯曲面,挤压于所述弯曲面。
19.根据权利要求18所述的熔接装置,其特征在于,
所述红外光源的下游部分与所述弯曲面相向。
CN201880067382.6A 2017-11-14 2018-10-17 熔接方法及熔接装置 Pending CN111315559A (zh)

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