THE “TWIST COVER”: A LITTLE HISTORY

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

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...

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

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

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

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 IN A 3 PIECE LINE

QUALITY CONTROL TASKS IN A 3 PIECE LINE

Quality is everyone’s task, also of the human production team. It is necessary to involve each of the operators of a line in the quality control tasks. In this text, suggestions are given about it.   INITIAL COMMENT ABOUT QUALITY CONTROL TASKS IN A 3 PIECE...
MECHANICAL PROPERTIES OF CANS

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 filled...
MECHANICAL RESISTANCE OF ELECTRIC WELDING

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 phase....
INTERIOR VARNISH LOAD IN ELECTRIC WELDING

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

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 container...
DIMENSIONAL CONTROL OF ENDS

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, easy-open...
PROOF OF POROSITY

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 with...
QA  OF LITHOGRAPHIC MATERIALS

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, which may...
PROOF OF HARDNESS IN TINPLATE DR

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 into...
CHROME PLATE IN VEGETABLE PRESERVES

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 valid...
FILIFORM CORROSION IN THE TIN

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

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, surface...
QA  IN THE LINES OF  CUTTING COILS

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

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...
VARIABLE QUALITY CONTROL PARAMETERS

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 types of...
AEROSOL CUPS

AEROSOL CUPS

SUMMARY Study of the characteristics, dimensions and equipment necessary for the manufacture of domes of aerosol containers. INTRODUCTION The aerosol containers are part of our life, during a certain day we are sure to make use of them several times. Its fields of...

Pin It on Pinterest