Below are the specifications of the seam corresponding to the containers of two pieces diameter 52 (202) used in the packaging of beer, and carbonated drinks

The attached documentation is a courtesy of the company Crown Bevcan España SL whose central manufacturing plant is located at PI El Sequero 26509 Agoncillo (La Rioja-Spain) Tel: 941431026

The multinational Crown is the current owner of the network of companies that in 1969 began in Spain, at its plant in Quart de Poblet (Valencia) the manufacture of metal containers for the packaging of beer. Likewise, its Technical Assistance Service was the one that advised all its clients in the use of the new type of container. (The original packaging was 3 pieces with tin-lead solder)

 

CROWN Bevcan Spain
Customer Assistance Service
SEAM SPECIFICATIONS – 52 mm (202)
GUIDELINES FOR THE CONTROL OF SEAM, CRITICAL AND NON-CRITICAL PARAMETERS.

(Daily Controls)

Seaming width. 2nd Operation
The Seaming Nominal Thickness (Seaming Width) is calculated by the formula:
[3 x Lid Thickness (measured)] +
+ [2 x Eyelash Thickness (nominal)] +
+ [0.13 mm (space provided for the compound)]
– The thickness of the lid should be measured individually using appropriate gauges or micrometers.
– The thickness measurement of Tab (container) is obtained from the information provided by the supplier
(maker).
Hollow (before Pasteurization)
0.10 mm. MAXIMUM
Overlap (measured with projector)
0.75 mm MINIMUM
Penetration of the body hook
72% – 92% (Tin Boats)
72% – 97% (Aluminum Boats)
Tighten the hook on the lid
100% without wrinkles

PARAMETERS
OPERATIONAL

(Daily Controls)

Seaming Length – 2nd Operation
2.55 ± 0.15 mm.
Depth of Cuvette – 2nd Op.
6.86 ± 0.15 mm.
Length of the Body Hook
1.60 ± 0.20 mm.
Lid Hook Length
1.60 ± 0.20 mm.
Free space
nominal 0.13 mm

OTHER PARAMETERS
WEEKLY CHECKS

Seaming Width – 1st Operation
2.10 ± 0.05 mm.
Seaming Length – 1st Operation
1.95 ± 0.05 mm.
Depth of Cuvette –
– 1st Operation
maximum 6.92 mm
In case you need to correct the adjustments, because after the weekly verification you will find seaming values
out of specifications, refer to the specifications and adjustment procedures.

04/28/2008
CROWN Bevcan Spain
Customer Assistance Service
A: SEAM LENGTH
B: SEAM WIDTH
C: CUTTING DEPTH
D: BODY HOOK
E: COVER HOOK
F: TRASLAPE
G: HUECO

ADDITIONAL INFORMATION ON SEAM CONTROL.
1. The values ​​that are included in the specifications are composed of a nominal value and its tolerance range.
These nominal values ​​must be taken as a target when readjustments are made and / or replaced.
tools.
2. It is important that the 1st Operation is adjusted to the nominal values ​​of the specifications. Use the sheets of
adjustments when controlling these parameters.
3. The final valuation of the seam is based on visual controls – of the Lid Hook once removed from the seam and
of the seaming section – and in obtaining the critical parameters.
4. Free Space is calculated as the difference between the value obtained from Seaming Thickness (actual measurement)
minus the result of the calculation: [(3 x Lid Thickness (measured)) + (2 x Lens Thickness (nominal))], without
take into account the compound
5. In the event that any parameters outside the specifications were detected during the measurements, it must be
perform a check by taking a second container from this station (or stations) before proceeding to
any readjustment
6. CAUTION!
As part of the seam evaluation, and regardless of the dimensions of the 2nd Operation, it must
To inspect the impression / fingerprint created on the body wall by the seaming process. In containers of
aluminum can fracture the wall of the body if this footprint is very deep.
7. Use the formula or consult the numerical tables to correctly calculate the theoretical value of the parameter
‘Seaming Thickness’. It is not recommended to maintain a unique seam setting for aluminum and steel cans.
The Seaming Thickness must always be evaluated together with the Tightening and Free Space
8. The specifications and procedures contained in this document should be considered as minimum
acceptable Special conditions may occur that require or allow the application of tolerances
more restrictive.
CRITICAL PARAMETERS HAVE TO BE RESPECTED ALWAYS.

 

 

Luis Sancho Blesa

 

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