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BEDELL-KRAUS 

1350 Commerce Drive, Stow, OH  44224

E -mail: infor@bedellkraus.com

Phone: 330-688-4881

FAX:  330-688-3324

BEDELL-KRAUS 

1350 Commerce Drive, Stow, OH  44224

E -mail: infor@bedellkraus.com

Phone: 330-688-4881

FAX:  330-688-3324

BEDELL-KRAUS 

1350 Commerce Drive, Stow, OH  44224

BEDELL-KRAUS 

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Bedell-Kraus

E -mail: info@bedellkraus.com

Phone: 330-688-4881

FAX:  330-688-3324

1350 Commerce Drive, Stow, OH  44224 

BEDELL-KRAUS

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Troubleshooting:  Modling Rubber Stamps

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Obviously, some of the remedies above will work, some will not. It is critical to experiment as this is not an exact science.

Several conclusions from reviewing the above can be made:

 

The hotter the press temperature used, the more chances for errors to occur. The dust is critical for good molding, it would never hurt to have a small supply on hand. Simply put dust in an old sock and re-dust the face of the rubber prior to molding. Proper storage of rubber is critical to providing the longest possible shelf life. If refrigeration is not possible, store in the coolest, driest area away from hot air and sunlight.  Bedell-Kraus guarantees all rubber for 60 days from invoice date only if stored at room temperature.

TROUBLE:

POSSIBLE CAUSE

Rubber is Gummy/Tacky

Rubber is not fully cured

REMEDY:

Check pressure temperature

 

Mold @ 307 F for

10 minutes 

Rubber Curls

Set up or air cured rubber 

REMEDY:

Rotate stock, store in coolest, driest location 

 

Excessive molding temperature 

REMEDY:

307 F recommended 

 

Pressure too high 

REMEDY:

Apply pressure to bearer tight only. 

Blister / Bubbles or Skips

TROUBLE:

POSSIBLE CAUSE

POSSIBLE CAUSE

Press temperature too high or uneven 

REMEDY:

Check for even heating of both platens 

 

Insufficient dust or talc on rubber 

REMEDY:

Re-talc; always put dusted side of rubber facing the image of the matrix mold. 

 

Too rapid of a close 

REMEDY:

Use a slower close, then open and close the press several times to allow gasses to escape. 

 

Original was not made with good sloping shoulders, not allowing trapped air to release 

REMEDY:

Always order engraving with good shoulders for ease of molding 

 

After 1-2  minutes in the press release the pressure  (bump) momentarily and re-apply pressure

POSSIBLE CAUSE

Insufficient rubber 

REMEDY:

On large solid areas, use rubber closer to overall stamps thickness 

 

Press temperature too hot 

REMEDY:

Check for even heating on platens 

 

Old or partially set-up rubber 

REMEDY:

Check for age, rotate stock 

 

Insufficient talc 

REMEDY:

Re-talc 

TROUBLE:

TROUBLE:

Stamps Not Filled Completely

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