Can seaming specs?
Can Standards
CAN TYPE | NOMINAL | ‘A’ FINISHED CAN HEIGHT |
---|---|---|
3 piece | 207.5 x 412 (60 x 121) | 120.65 (4.750) |
2 piece | 208 x 107 (61 x 37) | 36.51 (1.438) |
2 piece | 208 x 108 (61 x 38) | 38.10 (1.500) |
2 piece | 208 x 201 (61 x 52) | 52.39 (2.063) |
How do you test seaming quality in a can?
Seam integrity should be checked daily during operation of any canning system. Moreover, you should include multiple testing procedures and measurements in your seam evaluation process. Important components of a can’s double seam can only be evaluated by “tearing down” the seam.
Can double seams?
A double seam is that part of the can formed by joining the body of the can and the end (sometimes referred to as the cover). The body flange and the curl of the end interlock during the double seaming operation to form a strong mechanical structure.
Where are the seams on cans?
There are two types of seams on a can: side seams and end seams. Side seams are on the side of the can and are usually covered by the label. End seams are on the top and bottom of the can. If there is a dent over any of these seams, the can has at least a Major defect, meaning it is unsafe.
What is seam specification?
The seam specifications are actual measurements of the seam height, thickness, body hook, cover hook, overlap, and countersink (click here for more details). Each of these measurements is in . 001”. Each measurement will usually have a specific measurement (example .
Can seam overlap calculation?
Overlap Length = CH + BH + T – SH * In general practice, . 010” may be used for the cover thickness. However for accuracy, the actual plate thickness of the cover should be used.
Can seam defects?
A visual seam defect is a type of defect which you can see outside of a can’s seam. Visual seam defects include cut seam, droop, false seam, incomplete seam, cut-over, sharp seam, and vee. A packager should inspect visual seam defects on a can before starting the packaging process.
What is the important inspection of can double seaming?
INSPECTION OF THE DOUBLE SEAM Normally three points around the can are notched and checked. A visual inspection can reveal many flaws in the seam including overlap, the body and cover hook lengths, and the verification of proper mating of the parts.
Why is a double seam important in canning?
Double seams. Modern double seams provide an airtight seal to the tin can. This airtight nature is crucial to keeping bacteria out of the can and keeping its contents sealed inside. Thus, double seamed cans are also known as Sanitary Cans.
Can seaming defects?
Can seam dimensions?
The Can and End (Lid) dimensions must be as per standards to achieve the correct final Seam profile….
DIMENSION | NOMINAL DIA. mm (inch) | OPERATING LIMIT mm (inch) |
---|---|---|
Overlap | 307 – 404 (83 – 105) | 1.14 (0.045) min. |
502 – 603 (127 – 153) | 1.27 (0.050) min. | |
Tightness | 202 – 401 (52 – 99) | 70 – 100% |
404 -502 (105 – 127) | 80 – 100% |
What is seam analysis?
What is SEAM? The Socio Economic Approach to Management. This is the basic intervention model of Henri Savall and his team of associations (professors and doctoral students learning OD). SEAM was created by Henri Savall to link economics, accounting and a special Socio Technical Systems approach to large system change.
Can seaming issues?
What are the common problem in the seaming process?
Visual seam defects include cut seam, droop, false seam, incomplete seam, cut-over, sharp seam, and vee. A packager should inspect visual seam defects on a can before starting the packaging process.
What are the usual defects of can?
DISTORTED, CORRODED and DENTED Defects under this category often appear on the body of the can itself. Examples of these defects include corrosion, can stains and can body dents. Causes and prevention: Can body distortion and dents are usually caused by improper stacking of cans for transportation.
Can double seam measurements?
Key
Inches | mm | |
---|---|---|
Seam Length | 0.115 | 2.90 |
Seam Thickness | 0.0445 | 1.13 |
Body Hook | 0.0825 | 2.09 |
End Hook Length | 0.0735 | 1.86 |
Can a seam be inspected?
A seam saw will cut a notch through the double seam, allowing it to be visually inspected. Normally three points around the can are notched and checked. A visual inspection can reveal many flaws in the seam including overlap, the body and cover hook lengths, and the verification of proper mating of the parts.
How do you calculate overlap?
What is seam quality?
The quality of seam is assessed by means of its efficiency, elongation, bending, stiffness, abrasion resistance, seam-slippage strength, puckering, tightness, boldness, and seam damage [4]. A good seam has functional and aesthetic requirements.
What is seam strength?
Seam strength is a comparison test between an unseamed test piece of fabric and the seamed fabric specimen. The specimen is pulled in tension, similar to a grab test, until it breaks. If the unseamed portion fails before the seam fails, the woven textile is said to have 100% seam efficiency.
What is seam failure?
Seam Failure – Seam Slippage Seam Slippage on Rayon Fabric. DESCRIPTION: Where the yarns in the fabric pull out of the seam from the edge. This often occurs on fabrics constructed of continuous filament yarns that are very smooth and have a slick surface. Also caused by loosely constructed fabrics.
What are the two most common types of damage to cans?
‘Denting, crush damage and improper sealing are all common symptoms of excess force when processing aluminum cans. ‘
How wide is a standard seam allowance?
A seam allowance is the area between the fabric edges and the line of stitches. Seam allowances can range from 1/4″ wide to as much as several inches. Most patterns call for a specific seam allowance. In general, our patterns call for a 1/4″ or 1/2″ seam allowance.
How do you calculate lap splice?
2. Lap length in Tension
- Class A Splice: Lap Length ls = 1.0 ld.
- Class B Splice: Lap Length ls = 1.3ld.
- ls = 0.0005fy (d) ; [ For fy less than or equal to 60,000psi]
- ls = (0.0009fy – 24)d; [ For fy > 60,000 psi]
What is seam defect?
November 24, 2019. A visual seam defect is a type of defect which you can see outside of a can’s seam. Visual seam defects include cut seam, droop, false seam, incomplete seam, cut-over, sharp seam, and vee. A packager should inspect visual seam defects on a can before starting the packaging process.