Maintenance up to date
In our daily work routine we have to deliver our products together meeting all production indicators. Safety is paramount, product quality, minimal waste, equipment availability and more. All with due importance, taking care to meet the goals and objectives determined...
RELATIONSHIP BETWEEN SURFACE ROUGHNESS AND COATING QUALITY
RELATIONSHIP BETWEEN SURFACE ROUGHNESS AND COATING QUALITY Sometimes, a tinplate coated with a well-known varnish that has been applied under perfectly determined conditions shows an abnormally poor physical resistance behaviour. In these cases the blame is often...
quality control in the manufacture of metallic containers
Quality control in the manufacture of tinplate containers A canning container must meet certain requirements that make it suitable for the preservation of the canned product. These requirements are based on two fundamental aspects, a physical-chemical resistance that...
EXTERNAL CORROSION IN CANNED FOOD CONTAINERS
One of the problems that most concern the canning industry is external corrosion of the containers, since it affects the aesthetics of this, causes commercial rejections and can create sanitary problems when, in extreme cases, the containers are punctured . In order...
THE “TWIST COVER”: A LITTLE HISTORY
BACKGROUND Nicolás Appert, in Paris and at the end of the 18th century, discovered how to preserve food. In 1795 he started up his first canning workshop. Check that if they are heated, for a certain time foods at 100 ° C, in hermetically sealed containers, these can...
MANUAL TESTER OF THE METAL PACKAGING HERMETICITY
All the known systems for the determination of the hermeticity in metal containers destined to the canning factories, are based on producing a pressure difference between the inside and the outside of the containers, which is achieved in most of the occasions by the...
RAPID TESTING OF SUPERFICIAL LUBRICATION ON COATED METALS
Normally the electrolytic tinplate is lubricated with “dioctyl sebacate” (DOS) or with seed oils applied by electrostatic means and whose quantity can be graduated with great precision. The lubricant acts as a protective layer of chromium oxide and...
CORRECT USE OF TWIST OFF CAPS, PT AND PT PLUS VACUUM CAPS
IIntroduction to the excellent work “INSTRUCTIONS FOR THE CORRECT USE OF THE TWIST, PT, PT PLUS VACUUM COVERS” which, by courtesy of “CROWN CLOSURES EUROPA”, we have the pleasure to publish. Crown Closures Europe INSTRUCTIONS FOR CORRECT USE OF VACUUM COVERS...
EXTERNAL OXIDATION IN THE LIDS TWIST-OFF
It is very important, for the good presentation of a preserves packed in glass jars, closed with “twist-off” type caps that are free of bumps and oxidations. To avoid the presence of the latter, the manufacturer of the covers should take all possible...
METAL CAPSULES Twist-Off
SUMMARY In this work, the characteristics of the metal caps used in wide-mouth glass bottles, screw-lock or pressure-sealed, as well as the different types and sizes on the market, the raw materials used in their manufacture, their most common applications and their...
OVERCAPS FOR AEROSOL PACKAGING
This article illustrates the quality that should be met by a cap intended for aerosol containers and how to define and control it INTRODUCTION OVERCAPS FOR AEROSOL PACKAGING The objective of this work is the definition of quality characteristics,...
RECEPTION OF CANS IN A FILLING PLANT
A canner – canner, filler, etc. – You must define your policy in relation to the quality of your raw materials, among which are metal cans. In relation to these – or to any other product – you can take several positions: a) Full confidence...
QUALITY CONTROL TASKS ON A 3-PIECE LINE
Request a quote Company Directory Online Shop Technical information Mundolatas Consulting News Quality is everyone’s job, including the production team. It is necessary to involve each of the operators of a line in the control tasks. This text gives suggestions...
DIMENSIONAL CONTROL OF THREE PIECES TYPE PACKAGING
The procedure and means necessary to assemble a simple quality control system centered on three-piece cans is described. INTRODUCTION DIMENSIONAL CONTROL OF THREE PIECES TYPE PACKAGING We have already discussed in other works, different aspects of a...
MECHANICAL PROPERTIES OF CANS
The cans intended to contain food must have the strength and robustness to allow handling, filling and processing, storage and distribution without damage. The most delicate moment of a container is during the sterilization process to which it is subjected once...
MECHANICAL RESISTANCE OF ELECTRIC WELDING
INTRODUCTION La soldadura eléctrica, de la costura lateral The electrical welding, of the lateral seam of the bodies of the metal containers, is together with the seam of covers and bottoms, the critical point where a boat can present leaks in the manufacturing...
“COMAS” IN WELDING AND ITS MICROGRAPHIC CONTROL
In the “70s” of the last century, when the new welding technique of the lateral seam of the “three pieces” metal containers began, the “black beast” of the quality of this union was the appearance of “Commas” in...
INTERIOR VARNISH LOAD IN ELECTRIC WELDING
SUMMARY Determination, in a simple way, of the applied load of powder varnish on the inside face of the side weld, of a can once finished. INTRODUCTION The electric welding, which joins the side seam of three-piece cans, is a sensitive area that must be...
QUALITY CONTROL VALVE ROLL AEROSOL COVES
SUMMARY Mode and means to control the quality of the curl of the domes for aerosol containers on which the valve is mounted. PREAMBLE The aerosols are equipped with a metering valve for the product, which is attached to the top of the metal lid or...
EVALUATION OF EXPULSION OF THE PLUG IN PAINT CONTAINERS
SUMMARY In this article, we will try to describe an inexpensive way to verify the internal pressure, which supports the cap of a container intended to contain paint, before being expelled. BACKGROUND The present work is applicable to the different types...
DIMENSIONAL CONTROL OF ENDS
The means and the way to perform a dimensional control of ends, applying simple and reliable procedures, are treated in this technical article. INTRODUCTION In the metal industry, the purchase or exchange of already manufactured components is common (ends,...
QUALITY POINTS IN THE LINES OF CUTTING COILS
SUMMARY Description and location of quality control points on a coil cutting line INTRODUCTION The lines of cut of coils are installations, that little by little have been doing habitual in the plants of manufacture of containers. Initially, there was a high...
PROOF OF POROSITY
SUMMARY Determination and evaluation of the porosity of the interior varnish of a can by means of a high hardness test. It describes how to control the different parts of the boat. PRESENTATION Porosity means the smallest points inside a can protected...
EVIDENCE TO CONTROL THE QUALITY OF APPLICATION OF VARNISHES
The protection both external and internal of a metal container by means of varnishes is a very normal technique that already has a history of more than 150 years. In other technical articles of this Web the varnishes are analyzed from different points of view:...
QA OF LITHOGRAPHIC MATERIALS
We will study in this work the defects that can be presented more frequently in the realization of a lithography, its classification and its control. It is understood as lithography of a material, the application of a complete external lithographic system,...
DETERMINATION OF THE WEIGHT DRY FILM OF VARNISH
One of the most used typical tests in the metagraphic sector, which may also have application in the packaging industry, is to determine the load of varnish that has been applied on the metal with which a container is to be manufactured (or has already been...
FACTORS AFFECTING VARNISHING OF THE TIN
The defects produced in the tinplate varnishing (faults, “eyes”, lack of adhesion …), may be due to, among other things: – A) Dust particles on the surface of the same. – B) Excessive oil residues. –...
PROOF OF HARDNESS IN TINPLATE DR
INTRODUCTION The reduced double tinplate has a high rigidity, characterized by a hardness measured on the Rockwell 30T scale between 70 to 80 degrees. This measurement can be made on a Rockwell 15T equipment for thicknesses less than 0.20 mm and later converted...
CHROME PLATE IN VEGETABLE PRESERVES
SUMMARY It describes tests carried out in the laboratory, with canned different vegetable preserves, carried out using containers with lids and funds from TFS, to see the behavior of the same before this material. It is concluded that this product is perfectly...
FILIFORM CORROSION IN THE TIN
Filiform corrosion is a form of attack in which the corrosion process manifests itself in filaments and represents a particular type of anodic undercut. It is usually produced in humid environments and is more common under organic films applied on steel, aluminum,...
CORROSION OF THE TIN
It is mainly interesting to examine the behavior of tinplate as a raw material for the manufacture of containers, and specifically from the point of view of corrosion. Atmospheric agents attack tinplate according to ambient humidity, average temperature,...
QA IN THE LINES OF CUTTING COILS
It is increasingly common for the container manufacturer to buy the metal to be used (tinplate, TFS or aluminum) in coils. This allows them a better use of it. In order to prepare this material properly, it is necessary to use a coil cutting line that may be your...
SUPERFICIAL DEFECTS OF THE TIN
LIST OF ASPECTS AND SUPERFICIAL DEFECTS Summary MINOR DEFECTS: # Lines of Lüders # Brands of cold rolling cylinders # Stains or traces of degreasing or pickling # Woody appearance (“wood grain”) MAJOR DEFECTS: # Lack of fusion # Rusty...
DETERMINATION OF TOTAL TIN COATING IN THE TIN BY THE HEAVY LOSS METHOD (CLARKE METHOD)
There may be a need to determine the total amount of tin that tinplate has in each of its faces, not having specific equipment for this operation. The Clarke method allows you to find this value by counting only a basic laboratory material and a precision...
VARIABLE QUALITY CONTROL PARAMETERS
We will define in a very simple way each one of the basic concepts used in a quality control system by variables applied in the inspection of packaging. Before we will define what we understand by variables. WHAT TYPES OF VARIABLES DO WE KNOW? There are two...
