Electrostatic powder coating and interior curing is a process that offers several important advantages and features for the protection of metal containers. Here I explain how this process works and its key aspects: Electrostatic Powder Application Application Process:...
Objectives of Exterior Varnishing: Provide protection against corrosion. To give a good appearance to the exterior, with decorative and product identification function. Be resistant to sterilization processes. Facilitate and be resistant to mechanization processes....
To ensure powder adhesion on a container that already has an internal film or coating, several key factors must be considered: Varnish composition: It is essential that the chemical composition and additives of the interior coating are compatible with the...
To properly maintain the blades of a shear, it is essential to follow a series of steps and recommendations to ensure a clean cut and prolong the life of the blades. Here is a summary of best practices: Cleanliness Regular: The blades should always be clean. Use...
Clicking in canned foods can be due to several factors related to the packaging and storage process. Here are some possible reasons: Inadequate Sealing: If the container is not hermetically sealed, it may allow air to enter, which can cause cracking due to internal...
Cooling of canned tuna containers in the autoclave should be done using chlorinated water with a free chlorine residual of 0.5 to 2.0 ppm after contact with the containers. It is important to carry out a strict control of this chlorine concentration for each batch of...
The collapse of tinplate containers after autoclaving can be due to several causes related to improper handling during the sterilization and cooling process. Some of the causes identified are: Sudden pressure change: A sudden drop in pressure inside the autoclave at...
How to improve powder curing and adhesion to the container Lack of powder adhesion to the container can be due to several factors. Some of the possible problems and their corrections are: Burner temperature too low: This can prevent proper melting of the tin, which is...
Epoxy resins, derived from the condensation reaction between epichlorohydrin and biphenol A (diphenol propane), form the basis of a wide variety of protective and decorative materials. There are several types of epoxy resin combinations, the four most important being:...
information about twist off caps Twist-off lids are metal lids used to close glass or plastic jars, mainly intended for food packaging. These lids can be closed by a quarter-turn or press-on closure, and are opened by twisting or pushing them vertically. They are...
axial and radial strength tests on tinplate cans Axial and radial strength tests on tinplate cans are important to determine the ability of the cans to withstand the loads and pressures to which they are subjected during use and storage. For axial strength, it is...
The food canning process involves several critical steps to ensure the quality and safety of the final product. Here is a summary of the key steps based on the information provided: Food Preparation: Depending on the chemical and bromatological composition of the...
The canning process for canned fish includes several key steps: Can Manufacturing: Cans are manufactured from tinplate or aluminum. The necks of the cans are formed and inner coatings are applied to protect the contents from corrosion and preserve their quality....
Can corrosion in the fish canning industry can be caused by a number of factors and can manifest itself in different ways. Here are some potential causes and types of corrosion that could be affecting your canned fish products: Sulfide deposits: The interaction...
The technical process for the manufacture of a traditional closure is not explicitly detailed in the information provided. However, I can infer some general aspects of the metal closure manufacturing process based on the information on easy-open and Peel-Off closures....
A peel-off closure is a type of closure used on metal containers that allows a complete and simple opening of the container without the need for additional tools. Technically, it is characterized by the following manufacturing steps: Circular/Shear Cutting: Circular...
In the intricate world of can decorating, where precision and efficiency are paramount, Stolle Machinery’s integration of Mastercam technology into its presses is a major leap forward. This article delves into the nuanced functionalities and fine-tuning...
Steel ProductionThe tinplate production process begins in the blast furnace and tin smelter, although in practice, it is considered to start with the production of the base steel. Base Steel FabricationBase steel is the body and essence of tinplate, determining its...
Annealing and Heat Treatment of Metals: Comparison between Bell Annealing (BA) and Continuous Annealing (CA) Annealing is a fundamental heat treatment in the metal packaging industry, whose main objective is to restore ductility to steel after the cold rolling...
Steel Production: The Foundation of Tinplate in the Metal Packaging Industry Tinplate is a widely used material in the metal packaging industry, and its production begins with the manufacture of high quality steel. This steel, which constitutes more than 99% of...
Tinplate Passivation: Surface Protection against Oxidation and Sulfidation Tinplate, a material widely used in the metal packaging industry, requires a surface treatment known as passivation to increase its resistance to oxidation and sulfidation. This process is...
Cold Rolling of Tinplate for Metallic Containers Cold rolling is an essential process in the manufacture of tinplate, which in turn is a critical component in the metal packaging industry. This process involves reducing the thickness of the steel strip through...
Hot Rolling of Tinplate: Technical Process and Considerations Hot rolling is a crucial process in the manufacture of tinplate, a material widely used in the metal packaging industry. This technical process involves several stages and specific considerations to ensure...
Tinplate Electrolytic Tin Plating for the Metal Packaging Industry Tinplate is a key material in the metal packaging industry, and electrolytic tin plating is an essential process in its manufacture. This treatment consists of applying a layer of tin on a low carbon...
Oiling (DOS), a crucial step in canmaking In the metal packaging industry, oiling is an essential process carried out on the surface of cans to ensure proper sliding during manufacture and transport. This procedure not only facilitates can handling, but also plays an...
Pickling on Tinplate: A Key Process in the Metal Packaging Industry Pickling is a fundamental step in the production of tinplate for the metal packaging industry. This process involves cleaning and preparing the surface of the steel to remove the oxide layer that...
Tinplate Tempering in the Manufacture of Metal Containers Tempering is a critical process in the manufacture of tinplate for metal containers, following cold rolling and annealing. This heat treatment adjusts the mechanical properties of the tinplate to obtain the...
Tinplate in the Metal Packaging Industry: Manufacturing Processes and Applications Tinplate is an essential material in the metal packaging industry, valued for its properties such as mechanical strength, formability, tightness and hermeticity. This material consists...
Brazil accounts for 38.7% of the market share, followed by Argentina with 34%, while the remaining countries account for 26.5%. The graph shows the metal cans market in Latin America, broken down by country. There is a constant growth on the market,...
Market overview Metal cans are containers made mainly of materials such as aluminum or steel, designed for packaging and preserving various products, such as beverages, food and beverages… The metal can market has experienced substantial growth in recent years,...
Aluminum beverage can manufacturing is high volume, there are production lines that can run at more than 3,000 cans per minute when two printers are running in parallel, i.e. a production of more than 180,000 cans per hour. The slightest neglect at these speeds can...
Welding on Tinplate Cans Introduction Brief description of the importance of welding in the manufacture of cans. Mention of the types of cans (two or three pieces) and their relevance in the canning industry. Welding is an essential process in the manufacture of cans,...
Canned Foods – Technology and Preservation Introduction The canned food industry has evolved significantly in recent decades, adapting to changing consumer habits and demands for fresh, ready-to-eat products. Food preservation in tinplate and aluminum cans is a...
Introduction Aluminum is a widely used material in the food preservation industry due to its excellent barrier properties, strength and recyclability. Technological innovations have allowed aluminum packaging to evolve to improve food preservation and production...
Coatings for metal containers include a variety of chemical compounds designed to protect both the contents of the container and the metal against corrosion, deterioration and to maintain the quality of the packaged product. Among the most common types of coatings...
Physical properties of easy open lids: Easy open closures, also known as easy open closures, have several important physical properties that characterize them: Material: They are commonly manufactured in metal such as tinplate, TFS (Tin Free Steel) or aluminum. The...
Grinding of welding rollers is a critical maintenance procedure to ensure weld quality in metal container production. Soudronic recommends grinding the profile of the welding rollers after a production run of 1 to a maximum of 6 million bodies, or at least once a...
Why is it important that oxygen does not penetrate the container after packaging? The importance of not allowing oxygen to penetrate the package after packaging is that the presence of oxygen can cause oxidation and deterioration of the packaged product, as well as...
Causes of wire slippage on the weld in the welding process of food cans, here are some possible causes. Causes of wire slippage on the weld can include problems with the alignment of the welding rollers, the height of the sizing crown, incorrect wire width and...
Introduction In the manufacturing process of metal containers, such as three-piece cans, welding plays a crucial role in joining the edges of the sheet metal to form the body of the container. Soudronic, a leading manufacturer of machinery for the packaging industry,...
Cutting process in the manufacture of metallic containers The cutting process in the manufacture of tinplate containers and lids is carried out with metal that is received in the form of coils of approximately 10 tons. These coils have different widths, thicknesses,...
How to get a correct rubberizing of a lid In order to achieve a correct rubberizing of a round cap, it is considered necessary that the cap is turned at least two full turns during the application of the rubber, with an overlap of about 5 to 10 mm between the end and...
The copper sulfate test is a test used in the packaging industry to detect the presence of pores, cracks, or any discontinuity in the varnish film applied on tinplate cans. This test is important to ensure the quality of the protective coating and to avoid corrosion...
Club cans may experience rusting at the corners after sterilization due to several factors. One of these is improper post-cooling handling, where residual moisture can lead to corrosion, especially if cans are packed while still wet, creating a humid atmosphere that...
Blushing is a phenomenon that occurs during the manufacturing process of tinplate food cans, specifically during the thermal process. This problem manifests itself as the adsorption or absorption of components, generally water, in the varnish applied to the tinplate....
IntroductionElectrostatic powder is a polyester resin used in the metal packaging industry to protect welds from internal attack. Application and curing are critical processes that ensure the integrity and quality of the coating on the weld. Electrostatic Powder...
The can decorator is an essential machine in the aluminum can production line, responsible for applying graphic designs and trademarks to the can surface. This white paper examines the role of the can decorator, the printing technologies used, the challenges...
The manufacture of two-piece aluminum cans for beverages requires several elements or raw materials for its elaboration, among them are the varnishes for the exterior and interior protection, the inks for the creation of unique and distinctive designs in each type of...
BPA (Bisphenol A) migration in food cans occurs when components of the varnishes used in can coatings can be transferred to the contents of the container. This process can occur during prolonged storage or as a result of exposure to certain conditions, such as...
Dehydrators are products that absorb excess water vapor inside packaging to keep humidity under control and prevent condensation. These dehydrators must comply with specific standards such as the French Standard NF H 00320, the American Standard MIL D 3464 and the...
The appearance of white spots on the outside of cans may be due to the formation of deposits of dissolved salts, especially if the container is sterilized and removed from the cooling phase at too high a temperature, which generates strong evaporation of the water. In...
To improve the double seam in canmaking, there are several aspects that can be considered based on the information provided: Closing force control: It is important to adjust the closing force correctly to avoid too tight a seal, which can damage the varnish or eject...
Sealing compound or sealant is a special material that coats the inside of the curl of a can lid. When the can is properly closed, the seam formed closes around the compound, creating a hermetically sealed joint that prevents pressure loss and blocks the entry of...
The most common dimensions and formats of seafood cans, according to the information provided, include a wide variety of shapes and sizes. Here are some specifics: 1/4 Dingley: 112 ml, 105 mm length, 76 mm width, 21.5 mm height 1/4 Club: 115 ml, 105 mm in length, 60...
The basic rules for applying sealing compound to can ends are as follows: The weight of the compound should be monitored regularly to ensure that the correct amount is applied. This is typically done by subtracting the average weight of the ends with the dry compound...
The manufacturing process of an aluminum beverage can body involves several steps, which are typically carried out on an integrated high-speed production line. Here is a summary of the process: Aluminum coil preparation: The process starts with large aluminum coils,...
To control the pH and salts in the water used in the sterilization process, it is important to follow a series of recommendations: pH Control: Maintain the pH of the sterilization water between 7.00 and 8.00. Higher values may cause blackening of the tin by stannite...
To solve corrosion problems on metal containers during the sterilization process in autoclaves with water drizzle, several key aspects must be considered: Water quality: The water used for both the thermal process and subsequent cooling must be treated to avoid the...
Yes, autoclaves must be equipped with pressure safety valves. These valves are essential to ensure that the pressure inside the autoclave does not exceed the recommended limits, which is crucial for operational safety. Safety valves allow pressure to be released in a...
If product is cooled inside an autoclave without air pressure, there could be a risk to the integrity of the container, especially if glass containers are involved. The absence of air pressure during cooling may cause thermal shock to the containers, which could cause...
Weld marks refer to the marks or impressions left on the material after the welding process has been performed. These tracks are typically a series of dots or “knots” that are visible on the surface along the weld seam. The quality of these traces can be...
To improve the weld on a 610×708 container, several critical factors must be considered based on the information provided: Use of double refrigerated pulley: It is essential to have a welding machine with double refrigerated pulley to obtain a proper weld....
Leaking cans can be caused by several factors related to the weld and the condition of the can. Some of the possible causes include: Corrosion: There may be corrosion points coming from the outside which, together with secondary corrosion, may generate cracks...
Open or cold welds can be caused by several factors that affect weld quality in metal container manufacturing. Based on the information provided, some of the possible causes are: Excessive current: Too high a current can generate excessive heat and affect weld...
The deficiency of varnish in the inner varnish of the weld can be due to several factors. According to the information provided: Varnish porosity is a problem mentioned, which indicates that the applied varnish may contain micropores that do not provide complete...
The spring pressure on a can seamer can be adjusted and is important to ensure proper seaming. The required pressure depends on the format of the container and the thickness of the tinplate body, and may vary according to the type of seamer, the condition of the...
Tin plating is the process of applying a layer of tin to another metal. In the context of tinplate used for the manufacture of metal containers, tin plating refers to the application of tin on a steel base to protect it from external corrosion. Tin is a soft, white,...
The electrotest on food cans is a method used to determine the porosity in internal coatings of cans, especially those with an internal coating and is not applicable to bare cans, cans with aluminum internal coating or cans with zinc carbonate gold varnish. The...
To generate a good powder cure in the protection of container welds, it is important to follow a series of steps and control certain parameters: Rapid temperature rise: In order to properly melt the powder and keep the tin molten for as long as possible, a rapid...
To identify if the tinplate is of good quality, there are several factors and procedures that can be followed: Visual Inspection: A visual observation should be made both inside and outside of the tinplate containers, complemented with a photographic record to...
The thickness of tinplate for metal containers is determined by several factors, including the type of container, its end use, and the required mechanical properties. Here are some specific details to consider when determining tinplate thickness: Standard...
TFS (Tin Free Steel) containers, also known as chrome plate, are made from a base steel similar to that used in tinplate, but instead of being coated with tin, they are protected by a chromium and chromium oxide coating. This type of material was introduced as an...
No, TFS is not tinplate. The name TFS comes from the English words “TIN FREE STEEL”, which translates as “tin free steel”. It is also known as “chrome plate”. TFS is a different material that was developed as an alternative to...
The design of a can affects its usefulness in several significant ways: Hermeticity: The ability of a container to be absolutely airtight is crucial, as it protects the contents from external agents and ensures its integrity, maintaining the properties of the...
The most important features to consider in the design of a canned food can are: Airtightness: It is essential that the container be completely airtight to protect the product and avoid contact with air, oxygen or bacteria that could contaminate it. Protection against...
Introduction:Easy-open closures are key elements in the packaging industry, providing convenience and accessibility to consumers when opening food and beverage containers. In this technical article, we will explore the manufacturing process of easy-open closures,...
Introduction:Metal cans are widely used as packaging for food and other products due to their durability and ability to protect the contents from external factors. However, one of the most significant challenges facing metal cans is corrosion. Corrosion can compromise...
Introduction:Can decoration plays a crucial role in improving the visual appeal and brand recognition of beverage cans. This article aims to provide an overview of can decorating techniques and the machinery involved in the process. By understanding the different...
Introduction:Beverage can manufacturing processes involve several stages, machinery and materials. However, as in any manufacturing process, problems can arise that hinder production efficiency and quality. In this article, we will explore some of the common problems...
Trends in can varnish purchases Trends in the purchase of coatings for the metal packaging industry indicate a preference for products that comply with BPA-ni (unintentional Bisphenol A) legislation, which means that coatings manufacturers must provide certificates...
To reduce dented cans, it is important to consider several aspects of the can manufacturing and handling process: Optimization of the Seaming Process: It has been identified that the problem of wrinkling during can seaming has been a limiting factor in the...
The classification of printing defects may vary depending on the standard or criteria used by each company or industry. However, some common categories of can printing defects can be identified: Grease: Presence of any type and amount of grease on the outside of the...
The ideal pH of the sterilization water in the autoclave process should be in the range of 7.00 to 8.00. Values above this range may cause blackening of the tin by stannite formation and detachment of the varnish by an alkaline etching effect. To obtain this ideal pH...
Corrosion of steel in cans is a process in which steel deteriorates due to chemical reaction with its environment, especially in the presence of moisture and oxygen. In the case of food cans, steel corrosion can be a serious problem, as it can lead to food...
Possible causes of burning out the weld start may be the following: Welding current too high: If the welding current is too high, it can cause excessive heating at the start of the weld, which can result in a burn. Overlap too small: If the overlap between the welded...
The elongation of tinplate is an important factor in the drawing process. Elongation refers to the ability of the material to stretch without breaking. In the case of drawing, a tinplate with a higher elongation will allow for greater deformation before fracture...
The hardness of the tinplate can influence the drawing process in several ways. According to the available information, it is mentioned that the tinplate must have adequate deformation capacity to avoid surface failures during the process. Therefore, it can be...
The type of tinplate used in the drawing process can influence different aspects of the process. The following are some possible influences: Deformability: The deformation capacity of tinplate is an important factor in avoiding surface failures during the drawing...
Rerolling can influence the anisotropy of the materials. Anisotropy refers to material properties and behavior that vary in different directions. In the re-rolling process, the material is subjected to additional plastic deformation through cold rolling, which can...
For packaging food in tinplate containers with white BPA-NI varnish, it is important to consider the following aspects based on the information provided: Sanitary Requirements and Certificates: Make sure that the containers comply with sanitary requirements and have...
The metal exposure test on beverage cans is a quality control measure that tests the interaction between the inner lining of the can and its contents. This test is important because the inner lining of a can is designed to protect the metal from the product it...
The release of electrostatic powder in the can after filling can be due to several reasons:Overloading of the powder particles due to too high a voltage, which can cause the formation of waves (backpulverization).Discharge of sparks into the dust layer, which can...
Anisotropy in cans refers to the fact that material properties vary depending on the direction in which they are measured. This means that cans may exhibit different mechanical or physical behaviors when forces are applied in different directions. For example, in one...
During the metal container forming process, the step from flange initiated to curling involves a controlled deformation of the metal. Curling is an operation in which the edge of the bottom is curled or rolled to form a curl. This curl is useful to avoid cuts when...
Steel is used for a wide variety of metal packaging applications. It is used in packaging and closures for human and pet food, beverages, aerosols, personal care, household and automotive products, industrial products and paints, gift items and promotional products....
Tinplate passivation is a chemical treatment applied after tin deposition that stabilizes the surface characteristics of tinplate by controlling the formation and development of tin oxide. This process is carried out to avoid oxidation not only during manufacturing,...
An electrostatic powder machine works as follows to coat the weld: Dust extraction: The machine extracts the dust from a fresh dust tank, which is protected by several bags to keep the dust in perfect condition. A solids suction hose system is used to extract the...
ETP coils are low carbon steel sheets coated with a thin layer of tin. ETP stands for “Electrolytic Tinplate”, which translates as Electrolytic Tinplate. This type of material is commonly used for the manufacture of metal containers, especially for food...
To calculate the applied cost of a coating, it is necessary to consider several factors including coating consumption, coating cost per unit weight or volume, and other associated costs such as dilution and cleaning solvents used in the coating application process....
Tears are one of the main problems in the Front End area of the aluminum can production process. causes and possible solutions for tears in the aluminum can production process. Causes of tear offs include: Imperfections in the Aluminum Material: These can be surface...
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