PCB 周转

ESD分格托盘:智能EMS通孔PCB装配用防静电托盘

ESD分格托盘 让每个料号都待在放它的位置

导电ESD分格托盘:内径457 x 289 x 45 mm,20个约91 x 72 mm格位,可拆防静电隔板、EVA底垫与可堆叠盖板。

一款带可拆波纹隔板的导电托盘:内径457 x 289 x 45 mm,20个约91 x 72 mm格位,防静电EVA底垫,以及可堆叠的盖板。抽出隔板、换个位置,分格就随BOM改变 - 不用开新模具,也不用换新托盘。

主要特点

  • 电荷需要有去处

    绝缘料盒会把电荷留在元件上,直到有东西碰到它们。导电聚丙烯在电荷打火之前就给它一条接地的通路,而且碳是混炼进材料里的,没有会磨掉的涂层。

  • 混料比丢料更贵

    当两个料号共用一个料盒时,一个错误的数值会装上板、通过在线测试,然后在总装时失效。分格靠结构而不是靠自觉把料号分开,所以再忙的班次也分得开。

  • 审核要的是证据,不是意愿

    ESD控制计划要求你拿出容器、它的电阻范围以及审核记录。一只标明电阻率范围、测试点可重复的托盘就是证据。通用周转箱则是一条会被写进报告的缺口。

规格参数

数据均摘自 Southern Machinery 公开资料。两个来源不一致时,同时列出两个数值及其出处。

ESD分格托盘:智能EMS通孔PCB装配用防静电托盘 规格参数
产品系列ESD tray with grids, conductive anti-static component tray · ESD Tray With Grids, detachable grid anti-static component storage tray · Anti-static container with laminated dissipative foam, US-made · Verified
内径,长 × 宽457 x 289 mm · Not stated · 18 x 11-3/8 in = 457 x 289 mm · Verified
内深45 mm · Not stated · 1-3/4 in = 44.5 mm · Verified
总高About 50 mm, marked indicative on the drawing · Not stated · Not stated · To be confirmed
盖板457 x 289 x 5 mm, 1 piece, anti-static fluted board · Box cover listed as an accessory · Not stated · Verified
底垫457 x 289 x 5 mm EVA pad, 1 piece, anti-static · Not stated · Dissipative foam laminated to the corrugated material · Verified
长隔板Length 457 mm, 3 pieces · Not stated · Not stated · Verified
短隔板Length 289 mm, 4 pieces · Not stated · Not stated · Verified
分格间距About 91 x 72 mm · Not stated · Not stated · Verified
每盘格位数20, from 3 long and 4 short dividers · Not stated · Not stated · Verified
隔板材料Anti-static fluted board · Detachable grid partitions · Impregnated corrugated material with dissipative foam · Verified
主体材料Not stated · Conductive polypropylene, carbon-loaded compound · Impregnated corrugated board · To be confirmed
表面电阻率Not stated · 10⁴ to 10⁸ ohm, per IEC 61340-5-1 · 1 x 10⁶ to < 1 x 10⁹ ohm surface resistance, per ANSI/ESD STM11.11 · To be confirmed
壁厚与底厚Not stated · 2 mm wall, 3 mm bottom, stated for 3W-9805112 · Not stated · To be confirmed
泡棉电性能Not stated · Not stated · 1 x 10⁴ to < 1 x 10¹¹ ohm; foam thickness 1/8 in · Verified
耐温,标准等级Not stated · Standard grade, maximum not stated · Not stated · To be confirmed
耐温,可选等级Not stated · 120°C or 150°C grade on request · Not stated · To be confirmed
颜色,标准Black · Black · Not stated · Verified
颜色,可选Not stated · Red, yellow, green, or custom on request · Not stated · Verified
堆叠Not stated · Stackable and nestable design · Trays stack and nest together · Verified
标识Not stated · Silk screen printing, anti-static label · Not stated · Verified
托盘重量Not stated · 0.73 kg, stated for 3W-9805112 · Not stated · To be confirmed
标准系列Not stated · 9 models, 290 x 260 to 457 x 312 mm external · Not stated · Verified
洁净室使用Not stated · Smooth-surface grades listed for ISO Class 5 to 8 · Not stated · To be confirmed
引用标准Not stated · IEC 61340-5-1 · ANSI/ESD S20.20, ANSI/ESD S541, ANSI/ESD S4.1, ANSI/ESD STM11.11, ASTM D4060 · To be confirmed
定制模具周期Not stated · 15 to 25 days for a new mould · Not stated · Verified

型号、对比与待确认事项

Open points, shown as found (6 行)
Open points, shown as found
ParameterWhat one item saysWhat another saysWhat the difference meansStatus
Which tray is being quotedThe assembly drawing supplied with the enquiry is dimensioned 457 x 289 x 45 mm inside, with 3 long and 4 short fluted dividers.The nearest model in the published range is 3W-9805112, whose internal size is 417 x 292 x 30 mm with 70 detachable grids.These are not the same tray: 40 mm shorter inside, 2 mm narrower and 15 mm shallower, with a different divider count. Quote from the drawing you were sent, or ask which of the two is on the offer, because a 30 mm internal depth will not take the same component as a 45 mm one.To be confirmed
Surface resistivity or surface resistanceNo electrical value is printed on the assembly drawing at all.The product sheet states a surface resistivity of 10⁴ to 10⁸ ohm for the range, measured to IEC 61340-5-1.The reference datasheet states 1 x 10⁶ to less than 1 x 10⁹ ohm surface resistance to ANSI/ESD STM11.11. Surface resistivity and surface resistance are different measurements taken with different electrodes on different material, and the two documents cite different test methods. No test report for this tray was supplied, so the acceptance range and the method have to be agreed in the quotation.To be confirmed
Body constructionThe base tray and the dividers are both drawn as anti-static fluted board - a twin-wall sheet with an air gap between two skins.The body is described as conductive polypropylene, a carbon-loaded compound, i.e. a solid moulded shell.A solid moulded shell and a fluted board shell are different products with different weight, stiffness and cost. The photograph supplied with the enquiry shows a moulded base with fluted dividers inside it, which matches neither description on its own. Settle the construction before the price is fixed.To be confirmed
Temperature gradeNot stated.A standard grade is listed, plus an optional 120°C and 150°C grade. The maximum for the standard grade is not given.Without a stated ceiling for the standard grade, a tray placed near a reflow oven, a wave solder pot or a selective solder cell cannot be shown to be in specification. If the trays will live in a hot zone, name the grade on the order and get the temperature written down.To be confirmed
Grid construction and cell countFour rows by five columns, 20 cells at about 91 x 72 mm, set by 3 long and 4 short dividers.The range is described as detachable grid partitions, with 70 grids on 3W-9805112 and 80 grids on 3W-9805128 and 3W-9805129.The cell counts in the published range belong to other trays in the range, not to this one. Twenty cells at 91 x 72 mm and seventy cells in the same footprint cannot both be true, so the count follows the tray you actually order.To be confirmed
Standards and test evidenceNot stated.The range is referenced to IEC 61340-5-1.The reference datasheet states that the container meets ANSI/ESD S20.20, the packaging standard ANSI/ESD S541 and the worksurface standard ANSI/ESD S4.1, and gives its test methods as ANSI/ESD STM11.11 and ASTM D4060. Those are claims about a different manufacturer's product. If your ESD control plan requires a certificate to a named standard, ask for it with the quotation rather than assuming the standards transfer.To be confirmed
What one tray holds, cell by cell (3 行)
What one tray holds, cell by cell
GridCell sizeCells per tray
Fine grid36 x 18 mm or 40 x 24 mm80
Standard gridAbout 91 x 72 mm20
Wide cells168 x 64 mm10

详细介绍

六个零件,一只托盘,不用工具

托盘由模压底座、底垫、两种长度的波纹隔板和盖板组装而成。每个零件都能单独更换,正因如此,改一次分格是五分钟的事,而不是一张采购单。

  • 模压导电底座. 承载其他一切的外壳:导电聚丙烯,模压出定位盖板、防止堆叠托盘滑动的四角立柱。
  • 防静电EVA底垫. 457 x 289 x 5 mm的垫片平铺在底座内。它缓冲引脚末端,防止小件钻到隔板下面,也给托盘一个柔软的底。
  • 三根长隔板. 防静电波纹板裁成457 mm长,贯穿整个内部长度。三根在289 mm宽度上分出四排。
  • 四根短隔板. 同样的板材裁成289 mm,横穿长隔板。四根在457 mm长度上分出五列。
  • 它们构成的分格. 四排五列,得到20个约91 x 72 mm的格位。这个间距适合大多数通孔元件、连接器和小型组件。
  • 不用重新下单就能改分格. 抽出一根隔板,两侧的格位就并成一个。换个位置,间距就变了。托盘跟着BOM走,而不是让BOM等托盘。
  • 盖板是坐上去的,不是拧上去的. 457 x 289 x 5 mm的波纹板盖板落在四角立柱上。没有会丢的零件,没有要对准的螺孔,一个动作就合上托盘。
  • 堆叠与套叠. 合上的托盘靠立柱堆叠,空着时套叠。仓储向上长而不是向地面摊开,这通常是工厂最便宜的一块产能。

三种分格间距覆盖大部分THT线

格位尺寸决定托盘的用途。小格位分开片式元件;大格位容纳料盘、料管和组件。托盘外壳往往相同 - 变的是隔板这一套。

  • 细密分格,最多80格. 格位36 x 18 mm或40 x 24 mm。适合片式元件、小体积集成电路,以及任何真正风险在于两个料号同格的场合。格位较浅,零件不会在格位间串位。
  • 标准分格,20格. 457 x 289 x 45 mm托盘内约91 x 72 mm的格位。适合通孔电阻、电容、连接器与异形件,也是随询价提供的装配图上所示的规格。
  • 大格位,10格. 格位168 x 64 mm。适合料带盘、料管、较大的连接器,以及需要彼此不接触地流转的预装组件。

待确认项,照实列出

有六项参数在随附资料之间不一致。这里并排列出,而不是取平均、悄悄抹平或略去。每一项都是要在报价里解决的问题,而不是等模具开完之后再说。

一只托盘装多少,按格位算

容量由格位间距决定,而不是托盘外形。一格一件时,下表的数量就是不用重复点数就能备出的数量。把两件塞进一格当然可以,而这恰恰是分格存在的意义。

每一项参数都可调整

把元件尺寸、工艺温度和每板所需数量发给我们。托盘按零件定尺寸,而不是让零件迁就托盘。

  • 定制尺寸. 任何外形、任何内深。新开模具通常需要15至25天,因此几何尺寸在开模前就要定下来。
  • 分格数量与布局. 从两个大格到80个细格。因为隔板是独立零件,一只托盘可以覆盖多个BOM,布局改变无需再次采购。
  • 颜色编码. 黑色为标准色;红、黄、绿在该系列内常备。颜色混炼在材料中而非喷涂,因此在搬运接触点上不会磨掉。
  • 耐温等级. 普通装配车间用标准等级;靠近回流炉、波峰焊锡炉或选择焊工位的托盘用120 °C和150 °C等级。
  • 表面标识. 丝印料号、格位编号、搬运说明或客户标记。可变数据由防静电标签承担,印刷做不到。
  • 盖板、垫片与备用隔板. 存放与运输用盖板、替换EVA垫片,以及可单独订购的隔板 - 这样重排分格不必再买一只托盘。

把托盘纳入ESD控制计划

托盘只有在接地的体系里才起作用。以下六步决定你买回的托盘能不能真正改变现场。

  • 先确认接地通路. 托盘到货前先检查工位接地极。一只从不接触接地面的导电托盘,就是一只颜色特别的塑料盒。
  • 按BOM排分格. 按线上实际的料件组合插入隔板,并在每个格位上标出料号或批号。布局要和操作员一起定,而不是替他们定。
  • 收货即测. 托盘到货时测表面电阻,把读数记在送货单上。这第一个数就是此后每次审核的基准。
  • 只培训真正要紧的两条. 零件先入盘再移动;托盘绝不贴着台面拖行。这两条习惯覆盖了托盘失效的大多数情形。
  • 定下复测周期并坚持. 按固定周期复测,并把超出范围的托盘退役。周期长短不如记录重要 - 没写下来的审核不算审核。
  • 换线之间重排分格. BOM变了就换隔板,而不是换托盘。这一步才让分格托盘比一整排专用料盒更便宜。

落地过程中的支持

托盘订单是一笔尾巴很长的小采购。以下四点通常是我们真正做出价值的地方。

视频

来自 Southern Machinery YouTube 频道的视频。点击播放前不会从 YouTube 加载任何内容。

ESD PCB magazine rack: the installation sequence
ESD sit-stand stool for an SMT workstation
AGV trolley moving PCB through the factory
Intelligent material storage for a smart EMS factory
Dry box storage for PCB and components
Magazine rack installation, start to finish

工程笔记

ARTICLE 01The 40-Second Delay That Costs You a Shift

Nobody times the walk between the store and the bench. It is the cheapest thing on the floor to fix and the last thing anyone measures. Full text in English. Summary translated. Ask a production manager for the cycle time of a THT line and you will get a competent answer about insertion, wave soldering and test. Ask…

ARTICLE 02Why Your ESD Audit Keeps Finding the Same Thing

The finding is almost never the wrist strap. It is the container the parts are sitting in when nobody is looking at them. Full text in English. Summary translated. Every ESD audit ends with a list, and the same three or four items keep appearing on it. The operators have been trained. The benches are grounded. The…

ARTICLE 03Five Rules for Separating Components You Cannot See

A grid is a rule you can hold in your hand. These are the rules that make it work. Full text in English. Summary translated. Components are small, similar, and often identical in colour. Resistors in two values look the same at arm's length. A grid tray does not make them different - it makes them physically unable…

ARTICLE 04What a Grid Tray Actually Changes on the Bench

Not the components. The behaviour of the person loading them. Full text in English. Summary translated. A tray looks like a passive object, and the assumption is that buying one changes nothing except the storage. In practice the change is behavioural, and it shows up in the first week. The first change is that…

ARTICLE 05The Tray You Buy Once and Reconfigure Forever

If a storage decision has to be repeated every time the product changes, it is not a solution. It is a subscription. Full text in English. Summary translated. Most component storage fails the second time. The first job fits the bin perfectly. The second job needs different quantities, or a different component, or a…

ARTICLE 06Measure Your Own Handling Time Before You Buy Anything

Ten minutes with a stopwatch is worth more than any payback figure a supplier gives you. Full text in English. Summary translated. Every supplier, including us, has a payback number that says their product pays for itself. Those numbers are built on assumptions about your line, and your line is not the line the…

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常见问题

图纸上托盘的内径是多少?

内长457 mm、内宽289 mm、内深45 mm,盖板与EVA垫各厚5 mm。总高画作约50 mm,并在图纸上标注为示意值,因此在最终图纸发出前请按名义值看待。

能分出多少个格位?

20个:3根长隔板在289 mm宽度上分出四排,4根短隔板在457 mm长度上分出五列,间距约为91 x 72 mm。改变隔板数量就能改变格位数,而托盘本身不用变。

这只托盘是导电型还是耗散型?

产品规格页给出该系列的表面电阻率为10⁴至10⁸ ohm,依IEC 61340-5-1测试。随询价提供的参考数据表给出表面电阻1 x 10⁶至< 1 x 10⁹ ohm,依ANSI/ESD STM11.11,那是另一只托盘上的另一种测量。两个数值在待确认项表中并排列出而非合并,因为表面电阻率与表面电阻不可互换。

以后能改分格吗?

能,这正是这套结构的意义。隔板是独立的波纹板零件,所以换了BOM换的是隔板这一套,而不是换托盘。把两种长度的备用隔板一并订上,同一只托盘就能覆盖好几个产品。

带盖板吗?

图纸把457 x 289 x 5 mm的盖板列为四个零件之一,公开系列则把料盒盖板列为配件。请在报价中确认盖板是含在单价里还是单列,因为两份文件把它写在了不同的位置。

能承受多高的温度?

产品规格页列出标准等级,另有可选的120 °C和150 °C等级,但没有给出标准等级的最高值。因此如果托盘会靠近回流炉、波峰焊锡炉或选择焊工位,请指定高温等级,并把数值落实到文字。

能进洁净室吗?

公开系列列出适用于ISO 5至8级环境的表面光滑等级,即没有深分格缝隙的那些型号。波纹隔板托盘按设计就有棱边,所以如果洁净室分级才是硬约束,请改选光滑表面型号。

到货后怎样检验托盘?

收货时测表面电阻,把读数记在送货单上,并按固定周期复测。参考数据表写明其测试方法为ANSI/ESD STM11.11,并引用ANSI/ESD S20.20、S541和S4.1;随询价并未附上这只托盘的测试报告,因此请在首批出货前与我们约定测试方法和合格范围。

本页部分技术内容(表格、资料标题)按原文以英文显示。

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