Method and device for wave soldering incorporating a dry fluxing
operation
    21.
    发明授权
    Method and device for wave soldering incorporating a dry fluxing operation 失效
    采用干式助熔操作的波峰焊方法和装置

    公开(公告)号:US5722581A

    公开(公告)日:1998-03-03

    申请号:US655206

    申请日:1996-06-07

    CPC classification number: B23K1/20 B23K2201/42 H05K3/3468 H05K3/3489

    Abstract: A method for wave soldering a circuit having two or more faces comprising the steps of: (i) passing at least one initial gas mixture comprising at least one of an inert gas, a reducing gas and an oxidizing gas into at least one apparatus for forming excited or unstable gas species; (ii) converting the at least one initial gas mixture into at least one primary gas mixture comprising excited or unstable gas species and substantially free of electrically charged species; (iii) treating each of the two or more faces of the circuit with the at least one primary gas mixture at a pressure close to atmospheric pressure; and (iv) contacting the two or more faces of the circuit with at least one wave of a liquid soldering alloy.

    Abstract translation: 一种用于波峰焊接具有两个或更多个面的电路的方法,包括以下步骤:(i)将至少一种包含惰性气体,还原气体和氧化气体中的至少一种的初始气体混合物送入至少一个用于形成的装置 激发或不稳定的气体物种; (ii)将至少一种初始气体混合物转化成至少一种包含激发或不稳定气体物质并且基本上不带电荷的物质的主要气体混合物; (iii)在接近大气压的压力下用至少一种主要气体混合物处理电路的两个或更多个面中的每一个; 和(iv)使电路的两个或更多个面与液体焊接合金的至少一波接触。

    Method for wave soldering with lead-free solder materials
    24.
    发明授权
    Method for wave soldering with lead-free solder materials 失效
    无铅焊料波峰焊方法

    公开(公告)号:US5657924A

    公开(公告)日:1997-08-19

    申请号:US438555

    申请日:1995-05-10

    CPC classification number: B23K1/085 H05K3/3468 B23K2201/42 H05K2203/095

    Abstract: A method is available for wave-soldering component groups, especially printed circuit boards with shielding from the environment, in which lead-free or at least low-lead solders, especially tin solders, with a melting point of more than 210.degree. C., are used. Since in wave soldering the solder bath temperature must usually be set considerably higher than the melting point of the solder, problems with overheating the components are encountered with higher-melting lead-free or low-lead solders. This problem is solved in accordance with the invention by setting a solder bath temperature which is only a few degrees Celsius above the melting point of the solder material, and performing the wave-soldering by the action of a plasma of a process gas atmosphere at low pressure.

    Abstract translation: 一种方法可用于波峰焊组件组,特别是具有屏蔽环境的印刷电路板,其中熔点高于210℃的无铅或至少低铅焊料,特别是锡焊料, 被使用。 由于在波峰焊中,焊料槽温度通常必须设置得远高于焊料的熔点,所以与高熔点无铅或低铅焊料相比,会遇到过热部件的问题。 根据本发明,通过设定比焊料材料的熔点高出几摄氏度的焊料浴温度,并且通过处理气体气氛的等离子体的作用进行波峰焊,从而解决了该问题 压力。

    Attaching components and reworking circuit boards
    25.
    发明授权
    Attaching components and reworking circuit boards 失效
    安装组件和返工电路板

    公开(公告)号:US5639011A

    公开(公告)日:1997-06-17

    申请号:US390755

    申请日:1995-02-17

    Abstract: In one aspect, a device for attaching a component to a circuit board is provided, comprising a circuit board held in a holder and a contact heater that heats the component on the circuit board by contact and by conducting heat through the component. In a further aspect, the contact heater is in a wand which is manually moved onto the component. In another aspect, the invention provides a method for attaching a component to a circuit board, comprising the steps of gripping the component with a contact heater; placing the component on the circuit board; and heating the component on the circuit board by contact, wherein heat conducted through the component melts solder under the component and attaches the component to the circuit board.

    Abstract translation: 一方面,提供了一种用于将部件附接到电路板的装置,包括保持在保持器中的电路板和接触加热器,所述接触加热器通过接触加热电路板上的部件并且通过部件传导热量。 在另一方面,接触加热器是手动移动到部件上的魔杖。 在另一方面,本发明提供了一种用于将部件附接到电路板的方法,包括以下步骤:用接触加热器夹紧部件; 将组件放置在电路板上; 并且通过接触加热电路板上的部件,其中通过部件传导的热量熔化部件下的焊料并将部件附接到电路板。

    Methods and system for applying a uniform coating to a moving workpiece
using an ultrasonic spray head
    27.
    发明授权
    Methods and system for applying a uniform coating to a moving workpiece using an ultrasonic spray head 失效
    使用超声波喷头将均匀涂层施加到移动的工件上的方法和系统

    公开(公告)号:US5622752A

    公开(公告)日:1997-04-22

    申请号:US427145

    申请日:1995-04-24

    Abstract: A printed circuit board ("PCB") is moved on a conveyor towards an ultrasonic spray head ("head") that is mounted below the PCB on a guide rail. The guide rail and the direction of motion of the PCB define an acute angle. When the PCB reaches a predetermined position, the head begins a motion across the PCB, spraying a rectangular swatch of soldering flux. The velocity of the head is controlled such that the swatch of flux is substantially perpendicular to the direction of motion of the PCB. After spraying, the head deactivates and reciprocates back across the PCB such that no flux is sprayed. The cycle repeats after a predetermined delay whereby adjacent swatches of flux do not substantially overlap.

    Abstract translation: 印刷电路板(“PCB”)在输送机上移动到在导轨上安装在PCB下方的超声波喷头(“头”)。 导轨和PCB的运动方向定义为锐角。 当PCB达到预定位置时,头部开始横跨PCB的运动,喷涂矩形的焊剂焊剂。 控制头的速度使得通量的样片基本上垂直于PCB的运动方向。 在喷涂之后,头部通过PCB去激活和往复运动,使得不喷射焊剂。 循环在预定的延迟之后重复,由此相邻的焊剂块基本上不重叠。

    Rotary clip for solder pallet
    28.
    发明授权
    Rotary clip for solder pallet 失效
    用于焊盘的旋转夹

    公开(公告)号:US5593040A

    公开(公告)日:1997-01-14

    申请号:US566750

    申请日:1995-12-04

    Abstract: A pallet holds one or more circuit boards for processing. A pallet opening for receiving the circuit board has grooves at one side to retain an edge of the circuit board and rotary clips at the other side to receive and hold the opposite edge of the board. Each clip is a disk which is mounted for rotation about a central axis and is constrained to two angular positions by a detent. A notch in the disk receives the circuit board when in one position and clamps the board against a seat when in the other position. The notch is deep enough to allow the board to be shifted laterally for alignment with test apparatus.

    Abstract translation: 托盘包含一个或多个电路板进行处理。 用于接收电路板的托盘开口在一侧具有槽,用于将电路板的边缘和旋转夹在另一侧保持以接收和保持板的相对边缘。 每个夹子是安装成围绕中心轴线旋转并由制动器限制在两个角度位置的盘。 当处于一个位置时,盘中的凹口接收电路板,并且当处于另一位置时将板夹在座上。 切口足够深以允许板被横向移动以与测试装置对准。

    Reflow apparatus
    29.
    发明授权
    Reflow apparatus 失效
    回流装置

    公开(公告)号:US5579981A

    公开(公告)日:1996-12-03

    申请号:US371776

    申请日:1995-01-12

    CPC classification number: B23K1/008 B23K2201/42

    Abstract: A reflow apparatus includes a reflow furnace. A transfer device holds and transfers printed circuit boards with to-be-reflowed electronic components thereon from an inlet to an outlet of the furnace within the furnace. A plurality of adjusting/circulating sections separate an ambient gas for heating the printed circuit boards into predetermined temperature regions in the furnace in which the ambient gas is circulated in a heated state. A feed port is formed in the furnace to feed the ambient gas into the furnace under pressure. Residence parts each provided between adjacent adjusting/circulating sections regulate the amount of the ambient gas when the ambient gas, after having been sent to and heated in the adjusting/circulating section adjacent to the feed port, is circulated and sequentially moved to the adjusting/circulating sections at the inlet or the outlet and finally flows out through the inlet or outlet into atmosphere. Suction ports are open to the furnace to suck the ambient gas from the inside of the furnace. A flux removing unit is separate from the furnace and removes components of a flux from the ambient gas sucked through the suction ports from the inside of the furnace.

    Abstract translation: 回流装置包括回流炉。 转移装置在炉内从炉内的入口到出口保持并转移其上具有待回流电子部件的印刷电路板。 多个调节/循环部分将用于将印刷电路板加热的环境气体分离成炉中的环境气体在加热状态下循环的预定温度区域。 在炉中形成进料口,以在压力下将环境气体进料到炉中。 每个设置在相邻的调节/循环部分之间的居间部分调节环境气体的量,当环境气体在已经被送​​入并在与进料口邻近的调节/循环部分中被加热并循环并顺序地移动到调节/ 在入口或出口处循环切片,最后通过入口或出口流入大气。 吸入口向炉内开放以从炉内吸入环境气体。 助熔剂去除单元与炉分离,并从炉内部从吸入口吸入的环境气体中除去助熔剂的组分。

    Angled pallets for wave soldering
    30.
    发明授权
    Angled pallets for wave soldering 失效
    用于波峰焊的倾斜托盘

    公开(公告)号:US5540376A

    公开(公告)日:1996-07-30

    申请号:US324087

    申请日:1994-10-14

    Abstract: A pallet for holding a printed circuit board comprises first and second parallel rails and third and fourth parallel rails. The third and fourth rails each have first and second ends and form an angle of between about 30.degree. and 60.degree. with the first and second rails. The first and second ends of the third and fourth rails are connected to one of the first and second rails. The pallet further comprises an attachment for securing the printed circuit board to the third and fourth rails. The angled pallet has advantages over conventional pallets as shorts and shadowing are reduced.

    Abstract translation: 用于保持印刷电路板的托盘包括第一和第二平行导轨以及第三和第四平行导轨。 第三和第四导轨各自具有第一和第二端,并且与第一和第二导轨形成在约30度和60度之间的角度。 第三和第四导轨的第一和第二端连接到第一和第二导轨之一。 托盘还包括用于将印刷电路板固定到第三和第四轨道的附件。 倾斜的托盘具有优于传统托盘的优点,因为短裤和阴影减少。

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