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Glue dispenser dor SMT line ( Glue process )

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Dear all. We SMT line based on unversal machine and we are ... - Jun 13, 2007 by Sami  

#50630

Glue dispenser dor SMT line ( Glue process ) | 13 June, 2007

Dear all. We SMT line based on unversal machine and we are using DEK machine for printing with the two processes ( solder paste and glue ). I have seen that we waste time in Glue process using DEK machine because the machines are very quick than the SCreen printer machine . So I searchine for to use another machi ne rather than DEK machine in Glue process without using Metal screen . Can any body give me details about Glue dispensrs ? Where I can find the discription of these machines and what are the main characteristics of these dispensers ? Are they suitable for any type of PCB ?

best regards and wishes. SAMI boudjouad@yahoo.com

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JAX

#50633

Glue dispenser dor SMT line ( Glue process ) | 13 June, 2007

Universal has a GDM. You might even be able to mount the head to one of the machines you already have.

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#50648

Glue dispenser dor SMT line ( Glue process ) | 14 June, 2007

Good morning,

Glue printing and glue dispensing processes have their pros and cons. Speed is main glue printing process �pro�. A-n-y dispenser will be slower if you replace your DEK with it. Your placement machines do not wait, right? So I wonder what the problem with printer is.

BR, Pavel

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#50649

Glue dispenser dor SMT line ( Glue process ) | 14 June, 2007

Good morning,

Excuse me, Sami. I have misunderstood your question. If the glue deposition speed is the point of your interest you should think of screen printer tandem. You will not get higher speed with dispensers. Dispensers are very flexible but definitely much slower that screen printers in terms of dots per hour deposition speed.

You can: 1. Build a tandem (install printers inline one after another, MPM has tandem solutions, DEK might have as well). 2. Install additional printer near the existing one and connect them with T-conveyor. 3. Optimize you glue printing process to get highest speed. Make DOE (design of experiment).

BR, Pavel

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#50650

Glue dispenser dor SMT line ( Glue process ) | 14 June, 2007

Thank you Pavel for your interesting. Speaking on tact time ( machine speed per Board ), our Universal machines are too quick thank DEK machine, that's why I am thinking to add another machine in Glue process. FYI, we are working on Satellite receiver ie: main board, Front pannel and reader card. some times even thouhg in the main board the process is not optimized between the DEK and insertion machines. may be your Idea of adding anohter machine wiht T-Conveyor is the Ideal one. Can you please give me more details about this solution because in this case it is more complecated ( Priority order ). Please Pavel let's have a conatact on this solution.

boudjouad@yahoo.fr

best regards and wishes.

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#50651

Glue dispenser dor SMT line ( Glue process ) | 14 June, 2007

Hello Sami,

if your placer is faster than your printer you must have very few components on the board, how many are there? What is the tact time of your mounter for this board, what is the tact time of your printer? How large is the board, can you switch to multi panel boards? Then your printer should have enough time.

If you cannot change anything on the number of components you can place on the multi panel board I see two options:

(1) Really use a glue dispenser. Which mounter are you using - when we know this we can propose a dispenser fitting to the mounter(s). (2) Speed up your DEK printer by using a ProFlow direct print head. Send me the type and vintage of your DEK printer to eh@adoptsmt.com and we can check if your printer can use ProFlow.

Best regards,

Erhard

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#50654

Glue dispenser dor SMT line ( Glue process ) | 14 June, 2007

Dear ERhard.Our placer are Universal Genesis machines and the screen printer is DEK Horizon 02i . for Maian board the tact time in the placer is about 14 Sec and the printer is about 22 Sec. Means there is a big waste time . for Front pannel we are using Multi pannel of ( 4 Pcs in one PCB ). Yes we have just a few components the Tact time in DEK is about 23sec and in the tact time in the machine is about also 13 sec. these differences in time between the printer and the placers made a big interruption in production. that's why I am searching for a solution to optimize the line as we can .

best regards and wishes.

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#50657

Glue dispenser dor SMT line ( Glue process ) | 14 June, 2007

This solution is not as complicated as you might have thought. T-conveyor connected machines are widely used for applications requiring high material deposition throughput. This solution is made of:

1. Two independent screen printers 2. Two line loaders 2. Two simple conveyor systems 3. T-Conveyor

Printers and conveyors are connected by means of SMEMA. Two independent product �flows� (PWBs with deposited glue) from two different printers are joined into one by means of T-conveyor, doubling glue printing speed. If one of printers is free it simply prints glue and sends to conveyor. Printers work simultaneously. T-conveyor simply joins two streams into one.

All you need is additional printer, additional line loader, additional conveyor, T-conveyor and a bunch of SMEMA cables.

Ask these guys for details (they must be quite professional in conveyor systems): http://www.asys.de/

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#50672

Glue dispenser dor SMT line ( Glue process ) | 15 June, 2007

Sami, What happens at the oven? Running on belt mesh with several pcbs side by side?

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#50707

Glue dispenser dor SMT line ( Glue process ) | 17 June, 2007

Yes We have a belt mesh oven with several PCBs side by side . but the problem I am talking about is before the oven because if we have more PCBs inserted the oven can order them with any problem ( SMEMA ) . bets regards

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#50708

Glue dispenser dor SMT line ( Glue process ) | 17 June, 2007

I was wondering about a bottle neck at the oven too, but apparently you don't have that problem. Are the boards small enough that you can put more on a panel?

Other than that, it does sound like you need another printer feeding your placement machines via a T-conveyor setup.

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#50723

Glue dispenser dor SMT line ( Glue process ) | 18 June, 2007

Hi Sami

Why not think the other way? You know, making your board a multi-up panel? The old style way "designing for manufacturing" still exists...... right?

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#50727

Glue dispenser dor SMT line ( Glue process ) | 18 June, 2007

> Hi Sami
>
> Why not think the other way? You
> know, making your board a multi-up panel? The
> old style way "designing for manufacturing" still
> exists...... right?

And/Or get a much quicker printer.

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#50728

Glue dispenser dor SMT line ( Glue process ) | 18 June, 2007

Sami,

Have you tried anything to reduce your print time. For example, use the fewest fiducials possible (2 in most cases) for alignment. Get rid of unnecessary inspection sites. Adjust the start/stop of your stroke to reduce wasted movement of the print carriage. Increase the actual print speed in the program. For the record I have never printed adhesive, we have a dispenser, so take these suggestions with a grain of salt.

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#50729

Glue dispenser dor SMT line ( Glue process ) | 19 June, 2007

Dear Fastek. For the Front panel board we are using multible ( 4 boards in one PCB. even thought the balance between the DEK printer and the placers still big 6 sec as a difference. But, may be this is a good idea for the main board? may be also it's better to change the Head of the printer to ProFlow head, but this works only with solder paste not with GLue .

best regards

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#50730

Glue dispenser dor SMT line ( Glue process ) | 19 June, 2007

Dear Sami,

Consider doing DOE it the printing speed is a point of concern. A few questions:

1. Which glue do you use? 2. What are the printing process parameters you have entered into your DEK? Could you list them here (front/rear printing speed, separation speed, separation distance etc)?

I think your 6 sec waste could be partially compensated by process tweaking.

BR, Pavel

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#50736

Glue dispenser dor SMT line ( Glue process ) | 19 June, 2007

A faster printer..... at less than 14 seconds? I don't think you'll find one. Easier and cheaper to multi-up the board.

Another idea is to print a head of time and use magazines to store boards. Most adhesives have huge board life times. An in line magazine unloader would work, but you may need a lot of magazines, depending on the work order size.

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#50737

Glue dispenser dor SMT line ( Glue process ) | 19 June, 2007

I thought he said his printer tact was at 22 sec.

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#50738

Glue dispenser dor SMT line ( Glue process ) | 19 June, 2007

But his placement machine time was 13-14 seconds. That's the goal.

"Our placer are Universal Genesis machines and the screen printer is DEK Horizon 02i . for Maian board the tact time in the placer is about 14 Sec and the printer is about 22 Sec. Means there is a big waste time . for Front pannel we are using Multi pannel of ( 4 Pcs in one PCB ). Yes we have just a few components the Tact time in DEK is about 23sec and in the tact time in the machine is about also 13 sec. these differences in time between the printer and the placers made a big interruption in production. that's why I am searching for a solution to optimize the line as we can .

best regards and wishes."

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#50840

Glue dispenser dor SMT line ( Glue process ) | 25 June, 2007

Your placement machines are too fast. Slow them down and the line will be balanced. This is the easiest way to make the industrial engineers happy.

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