CN1038295C - 印刷电路板专用的带金属薄层的塑料层压板的制造方法 - Google Patents

印刷电路板专用的带金属薄层的塑料层压板的制造方法 Download PDF

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CN1038295C
CN1038295C CN93102988A CN93102988A CN1038295C CN 1038295 C CN1038295 C CN 1038295C CN 93102988 A CN93102988 A CN 93102988A CN 93102988 A CN93102988 A CN 93102988A CN 1038295 C CN1038295 C CN 1038295C
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Prior art keywords
compoboard
group
band
sheet
plastic laminates
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Expired - Lifetime
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CN93102988A
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CN1086949A (zh
Inventor
斯塔比尔·阿尔多
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Cedal SL
Stabil Aldo
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Cedal SL
Stabil Aldo
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Priority claimed from ITMI921060A external-priority patent/IT1255128B/it
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    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B32—LAYERED PRODUCTS
    • B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
    • B32B15/00—Layered products comprising a layer of metal
    • B32B15/14—Layered products comprising a layer of metal next to a fibrous or filamentary layer
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • B29C66/00—General aspects of processes or apparatus for joining preformed parts
    • B29C66/80—General aspects of machine operations or constructions and parts thereof
    • B29C66/83—General aspects of machine operations or constructions and parts thereof characterised by the movement of the joining or pressing tools
    • B29C66/832—Reciprocating joining or pressing tools
    • B29C66/8324—Joining or pressing tools pivoting around one axis
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • B29C35/00—Heating, cooling or curing, e.g. crosslinking or vulcanising; Apparatus therefor
    • B29C35/02—Heating or curing, e.g. crosslinking or vulcanizing during moulding, e.g. in a mould
    • B29C35/0272—Heating or curing, e.g. crosslinking or vulcanizing during moulding, e.g. in a mould using lost heating elements, i.e. heating means incorporated and remaining in the formed article
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
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    • B29C65/02—Joining or sealing of preformed parts, e.g. welding of plastics materials; Apparatus therefor by heating, with or without pressure
    • B29C65/34—Joining or sealing of preformed parts, e.g. welding of plastics materials; Apparatus therefor by heating, with or without pressure using heated elements which remain in the joint, e.g. "verlorenes Schweisselement"
    • B29C65/3404—Joining or sealing of preformed parts, e.g. welding of plastics materials; Apparatus therefor by heating, with or without pressure using heated elements which remain in the joint, e.g. "verlorenes Schweisselement" characterised by the type of heated elements which remain in the joint
    • B29C65/3444—Joining or sealing of preformed parts, e.g. welding of plastics materials; Apparatus therefor by heating, with or without pressure using heated elements which remain in the joint, e.g. "verlorenes Schweisselement" characterised by the type of heated elements which remain in the joint being a ribbon, band or strip
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    • B29C65/02—Joining or sealing of preformed parts, e.g. welding of plastics materials; Apparatus therefor by heating, with or without pressure
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    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
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    • B29C66/00—General aspects of processes or apparatus for joining preformed parts
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    • B29C66/135—Single hemmed joints, i.e. one of the parts to be joined being hemmed in the joint area
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    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
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    • B29C66/00—General aspects of processes or apparatus for joining preformed parts
    • B29C66/40—General 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
    • B29C66/41—Joining substantially flat articles ; Making flat seams in tubular or hollow articles
    • B29C66/45—Joining of substantially the whole surface of the articles
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • B29C66/00—General aspects of processes or apparatus for joining preformed parts
    • B29C66/80—General aspects of machine operations or constructions and parts thereof
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    • B29C66/816—General aspects of the pressing elements, i.e. the elements applying pressure on the parts to be joined in the area to be joined, e.g. the welding jaws or clamps characterised by the mounting of the pressing elements, e.g. of the welding jaws or clamps
    • B29C66/8161—General aspects of the pressing elements, i.e. the elements applying pressure on the parts to be joined in the area to be joined, e.g. the welding jaws or clamps characterised by the mounting of the pressing elements, e.g. of the welding jaws or clamps said pressing elements being supported or backed-up by springs or by resilient material
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
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    • H—ELECTRICITY
    • H05—ELECTRIC TECHNIQUES NOT OTHERWISE PROVIDED FOR
    • H05K—PRINTED CIRCUITS; CASINGS OR CONSTRUCTIONAL DETAILS OF ELECTRIC APPARATUS; MANUFACTURE OF ASSEMBLAGES OF ELECTRICAL COMPONENTS
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    • H—ELECTRICITY
    • H05—ELECTRIC TECHNIQUES NOT OTHERWISE PROVIDED FOR
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    • H05K3/00—Apparatus or processes for manufacturing printed circuits
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    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
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    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
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    • Y10T29/49—Method of mechanical manufacture
    • Y10T29/49826—Assembling or joining
    • Y10T29/49906—Metal deforming with nonmetallic bonding

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  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Physics & Mathematics (AREA)
  • Microelectronics & Electronic Packaging (AREA)
  • Manufacturing & Machinery (AREA)
  • Fluid Mechanics (AREA)
  • Thermal Sciences (AREA)
  • Oral & Maxillofacial Surgery (AREA)
  • Health & Medical Sciences (AREA)
  • Laminated Bodies (AREA)
  • Casting Or Compression Moulding Of Plastics Or The Like (AREA)
  • Lining Or Joining Of Plastics Or The Like (AREA)
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Abstract

本发明为外表面带有铜薄片的塑料层压板(特别是用于印刷电路的层压板)的生产方法，所述薄片是从一连续带(30)得到的，通过交替地设沿一个方向及其相反方向弯曲(32)，该带从依次上下叠放的各个组合板的各个表面上穿过，带(30)在其两端(36、37)与发电机(72)相连，作为一组电阻产生生产过程所需的热量，当由冷压机(60)向组合板加以适当压力时，各组成部分之间便紧密结合，从而构成塑料层压板。

Description

印刷电路板专用的带金属薄层的塑料层压板的制造方法
本发明涉及一种印刷电路板专用的带金属薄层的塑料层压板的制造方法。
一般而言，塑料层压板由多层塑料材料形成的若干薄层组成，这些薄层通常借助于压力以稳定的方式组合在一起，附着在纸、纺织品、玻璃纤维或其他材料制成的基片上。所述塑料材料可以由酚、蜜胺、环氧树脂、聚脂、硅、氟化物、或其他材料构成。
在生产印刷电路时，在加压过程中将金属薄片(通常为铜片)附着在其一个或两个侧面上。
制造过程中，一般构成基本上相同的一叠组合板，每个组合板由若干浸注塑料的薄层及铜片组成，在每个组合板的两面上各放置一张铜片。
在各个组合板之间放置一个不锈钢的或其他种类的金属层，并将这样构成的一叠放到一个多板压机内，该压机能同时提供热量和压力。
在每个加热周期中，压强高达100kg/cm2的情况下温度可达190℃并持续100分钟以上，还包括一个使温度降至70-80℃的冷却阶段。每当一个加热周期结束时，便得到一个紧密而坚固的产品，它的各个组成部分被紧密地组合在一起。
适合这类生产的压机有许多加热板，而且必须按严格而正确的顺序同时产生热量和压力，它们需要通过热传导过程形成贯穿这一叠中各个组合板的均匀温度。而且，这一叠中只有在顶部和底部的组合板才与加热板接触。由于这些原因，这类压机必定是构造复杂，而且生产效率很低。
特别是，热量从压机加热板向重叠的组合板的传导及在冷却阶段冷却单元的热传导，因为必须穿过由浸注塑料的玻璃纤维或其他等效绝缘体(它们是公知的不良热导体)构成的部分，使热传导在这一叠中这类材料上部和下部的组合板中受到极大的阻碍。
除了使压机结构复杂外，多个加热板的存在减慢了组合板的加载和卸载过程。而对于短期生产而言，造成的这类问题使其生产成本上升。本发明的主题是一种印刷电路板专用的带有金属薄层的塑料层压板的制造方法，包括如下步骤：构成一叠组合板，每个组合板有若干浸注塑料的支持片以及在一个或两个表面上的金属薄层。所述金属薄层是从一个连续带上释放下来的。该金属带的初始段与从下面开始的第一组薄片的下表面相匹配。当折叠180°后，第二段金属带放在这一组薄片的上表面，在将金属带放到那里并沿着与第一次折叠相反的方向折叠180°后，第三段与第二组薄片的下表面匹配。
在沿着与第二次折叠相反的方向折叠180°后，该金属带达到前一组薄片的上表面，如此进行下去，直至达到最后一组薄片的上表面为此。
金属带的两端连到一个提供适当功率的发电机上。
所以，通过在这一叠组合板上造成适当的压力和闭合发电机电路，与组合板表面相匹配的各段金属带起到电阻的作用，从而在组合板的各个组成部分之间造成紧密的结合，当然也就制成了塑料层压板。
所述金属带最好是铜带。
本发明具有许多优点。
由于这些压机不需要同时供给热量和压力，它们会更简单，而且能产生适当压力的各种压机均可使用。热量是在每个单个组合板处产生的，而且能够在短时间内达到均匀的温度。
生产周期可长可短。
由于在每个组合板中的各个铜层能以连续条带形式提供，从而也相当地缩短了冷却时间。
所以加热和冷却都能更快地完成，因为不会象当前使用的过程那样由于上下组合板中的浸注塑料玻璃纤维或其他支持材料组成部分(它们是公知的不良热导体)的阻挡而使热量或致冷单元的热传导被阻挡在每个组合中。
当使用组合加压方式时，即在一叠组合板的每一端内由传统类型的加热板加热，并通过铜带直接加热，则加热时间当然会进一步减小，而生产率会进一步提高。
工作循环将会加速和简化，从而可以降低成本。
通过阅读下述由示意图表示出的本发明实施例，本发明的特点和目的将变得更加清楚。
图1是对所包含的组合板同时产生热量和压力的当前所用类型的多板压机，用于以当前使用的方法制造印刷电路所需层压板。
图2是利用本发明的生产方法制成的一叠组合板。
图3是如图2所示的一叠组合板放置于一个模具中时的情形。
图4是图3中的模具被放入一个冷压机中时的示意图。
图5是图1中的一叠组合板中的热传导。
图6是图2中的一叠组合板中的热传导。
多板压机10中设有加热板11，在加热板11之间放置多叠16组合板12。
所述组合板12由浸注环氧树脂的玻璃纤维织物层13及铜薄层14组成。
钢片层15放在各组合板之间。
在图2中的叠20中，组合板21由浸注环氧树脂的玻璃纤维层25的组22-24构成。
连续铜带30以S型绕在各组之间。
钢带40-43被插入到各组合板之间。
如图所示，带30的第一段31被放置在第一钢片40上面。
当把玻璃纤维织物片25的组22放好时，铜带成180°弯曲32，以便使一段铜带33放在组22的最后片的上表面。
将第二钢片41放到铜带上之后，所述铜带沿着与第一次相反的方向作另一次弯曲34，从而与所述钢片41的上表面匹配。如此继续下去，直至放上最顶上的一段35并将钢片43放到它上面为止。起始端和终止端36和37允许向外伸出。
在铜片40-43与铜带30之间放置绝缘材料层(图中未画出)。
如图3中可见，这样构成的叠20被放到由两个棒53和54连接的板51和52之间的模具50中，这里所示36和37两端作为进一步向外延伸端。
图4中绘出一个冷水压机60，其顶板和底板61和62由四角处的4个柱63-65连接和导向。
这种压机只适用于挤压叠起的组合板。上述模具50放在板61和62之间。带30的两端36和37被连到与发电机72相连的导体70和71。当闭合电路时，整个铜带的作用如同一个电阻，它的所有各段(如31、33、35)直接向片25的各组22-24供热，这与压机加压同时提供给挤压过程。
然后在带的各段31、33、35等之间的弯曲部32、34及其他弯曲部切断，以便简单而快捷地提供出印刷电路用层压板。
图5给出图1所绘当前所用的压机之一(标为10)，标为100的线系指出由加热板11发出的热量的传播或冷却单元的热传导。
图6给出图1中见到的组合板叠，并给出金属带30的各段31、33、35发出热量的传导路线。

Claims (1)

1.一种印刷电路板专用的带金属薄层的塑料层压板的制造方法，作法是构成组合板(21、81)的叠层(20、80)，每个组合板由浸注塑料的支持片(25)组(22-24)及在其一面或两面上的金属薄片组成，其特征在于：该金属薄片从一个连续的金属带(30、95)得到，该金属带先放在从底部起始的薄片(25)的第一组(22)的下表面，然后构成180°弯曲部(32)，再放到所述组(22)的上表面，在放上金属片(41)和使金属带沿着与第一次相反方向构成第二次180°弯曲(34)后，所述带被放在第二个片组(23)的下表面，然后，在沿与第二次弯曲相反方向构成第三次180°弯曲之后，所述带放到片(25)的第二组(23)的上表面上，如此继续，直至达到片(25)的最后一组(24)的上表面，带(95)的两端(36、37-96、97)与适当功率的发电机(72、91)相连，这样，通过在组合板(21、81)各表面匹配的带(30、95)各段(31)(33)(35)起到电阻的作用，从而使各部分之间造成紧密结合，构成塑料层压板。
CN93102988A 1992-05-05 1993-03-17 印刷电路板专用的带金属薄层的塑料层压板的制造方法 Expired - Lifetime CN1038295C (zh)

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ITMI921060A IT1255128B (it) 1992-05-05 1992-05-05 Procedimento per la produzione di laminati plastici con lamine metalliche in specie per circuiti stampati.
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