Inprocess inspection for injection molding

[Former Member]

Dear all,

My company is manufacturing spare parts for automobile. I have a complex scenario on one of the machine where I need advise.

one of the injection molding machine has 30 cavities in it. It is producing 30 pieces/shot. Each piece has the reference no. that tell on what cavity it is produced. our Quality department wants to record below parameters on every 3 Hrs with the reference of cavity no.

1. Weight of the Piece  

2. Diameter of the piece.

3. Light of the Piece.

Sample is drawn once and then diameters of all the pieces are checked and needed to record. other than that the remaining 2 parameters it is random check out of selected 30 pieces and only 10 reads needed to incorporate against the cavity where i was produced.

I know this can be done with simple inspection plan but I am not sure about the best way to handle the case where I given them provision to enter 30 diameters with reference of each cavity in one in process inspection.

Any idea or Advise.....

Regards

CR

[former_member184574]

Hi Cristina,

You can fulfill this requirement using function In-process inspection in Production with inspection points and this requires PP-QM integration. You need to use the inspection type 03.

Check the following links for the same.

Also work with the PP consultant for configuring this.

Hope this helps.

Thanks

Kumar

[Former Member]

Kumar,

I understand we can do it with in process inspection with inspection points

My question is., for example If i am producing a shaft and i have to take 5 readings on shaft from different known places and I want to enter then in system with the reading point reference? how this can be done in inprocess inspection.

[former_member184574]

Hi,

Inspection points can be configured as per our requirement. Check the below document

Thanks

Kumar

[Former Member]

Kumar,

I think I didnt explain it well. I am looking to enter result of 30 cavities (diameter only) with the reference of cavity no. in one inspection point.

Cavity 1 - 100mm

cavity 2 - 101mm

cavity3 - 102 mm

is there any appropriate way of doing it?

[former_member184574]

Hi Cristina,

For each cavity you generate one inspection point and enter the cavity number in the inspection point reference. I think in this way you can meet the requirement.

Thanks

Kumar

[former_member42743]

Can you set the characteristic for individual results recording and set it up for 30 individual values, (Fixed sample size = 30)?  Then have them use the inspection description for each individual result to record the cavity number?

Craig

[Former Member]

Craig,

Thats the last option I have in mind to use.

I have 5 parameters of 30 cavities, making it 150 readings in one inspection. I am looking if SAP offers some simple solution to this...

what do you say.

[former_member42743]

Provide one pass/fail characterisitc and have them scan their worksheet in and attach it to the inspection lot under services for object.

I know they must be using a paper based form this to record the original testing on.  Why make them enter the info twice?  The question is how you actually use the data values.

If you need the data for a report, then I'm not sure of any easy way around it.  If you have 150 readings to enter, you have a 150 readings.

The alternative is inspection points.  One operatoin with one sample for all your other testing. A sceond operation with 30 samples.  Then at least these could be enterred via the spreadsheet type of data entry for inspection points which might be easier.

Craig

[Former Member]

Craig,

Business needed it for statistical reports to monitor the deviations in product.

I am thinking what you said is bit simplier, making operation for each property which they want to record and each operation will have 30 MIC in it to cover all cavities..let me know if i misunderstood any thing.

regards

CR

[former_member42743]

You only need two operations, not one for each property.  Maybe only one because I don't know what your other testing requirements are.

Operation 0010:

     Sample x - test one, test two, etc..

Operation 0020:

     Samples 1 through 30.

          MIC 1,

          MIC 2

          MIC 3

          etc...

Record results for operation 20 via QE71.

Craig

[Former Member]

Craig, how 2 operations will add value, I am think off keeping something like below,

Operation 10 - Thickness

Cavi 1 thickness

Cavi 2 Thinkness

Cavi 3 thickness

Operation 20 - Length

Cavi 1 - length

Cavi 2 Length

Cavi 3 - Length

Operation 30 - Weight

cavi 1 - weight.

cavi 2 weight

cavi 3 weight ....

what do you say>?

[former_member42743]

If you are only doing the "30" cavity inspections why three operations?

I only suggested operation 0010 in my example to hold tests that you might do on the group as a whole.  Like if you took one part and did a tensile strength for the batch or tested for color or something.

You can do it as you suggest above but why one operation per MIC?

With all the MIC's in one operation you can use QS71 to enter in the results in a spreadsheet form that should save a lot of time in recording once they get use to the screen.  QS71 is not the greatest transaction and has some 'features' that take some getting used to.  But it would be much faster to use then the standard results recording like QE51n.

Craig