Types of Industry
When the temperature control range of an industrial furnace does not exceed 290 °C, we can use irreversible heat-sensitive labels. These indicators are the most cost-effective, simple and accurate option we can use – depending on the temperature range. Choose a clean, dry area of the part where to stick the label before placing it inside the oven. At the end of the process, we will see what has happened. We can even< remove the label to attach it to a report if needed for quality control purposes.
When labels cannot be used – either because the parts are too small and there is not enough space to stick them on, or because the temperature reached is over 290 °C – a good temperature control system for a furnace is the use of heat-sensitive crayons. With this option, we will cover a temperature range of 120 to 600 °C. It is also quite easy to use. Because it is a wax crayon, we can mark the pieces conveniently without needing much space. In this case, if we have marked a part that we will include in our sales inventory, we will have to remove the line, which can be done by simply using sandpaper – manually or mechanically. If we were able to place a part made of the same material or a testing part in the same furnace, we could skip this step.
There are furnaces in which the temperature reaches 1300 °C or more. In such harsh temperatures, the use of paper labels or crayons is ruled out. To control the temperature of an industrial furnace that reaches such high temperatures, we will use thermochromic paints, which are designed to withstand this heat, and also to change colour according to the temperatures reached. These work conditions make the situation somewhat complicated, and readings will require the operator to have some prior information before using this type of paint. The paint is supplied with all the information needed to achieve maximum performance and to identify the colours before starting work. The documentation includes:
During the manufacture of solar panels, the ideal temperature to be reached in the polyester and glass melting stage is 132 °C. It has been proven that this temperature enables the perfect union between both components and ensures the perfect watertightness of the assembly. Watertightness is crucial for the panel to be 100% effective when it is put into service.
Quality control in the manufacture of food cans is an essential requirement for health reasons. In the manufacturing processes of any elements or accessories related to consumer products or items that come into contact with living beings, making sure that they comply with current regulations is necessary. Health requirements, HACCP protocols, etc. have been revised and perfected in recent times to prevent the development of viruses and bacteria due to undesirable contamination in packaged products.
A food can that has deteriorated or been damaged by faulty welding can be particularly dangerous for consumption. The germs that develop inside it could pose a threat to living beings and even be fatal.
The improvement of these containers – besides the use of new lighter metals, stainless metals like aluminium, and less rigid and alterable like brass – is largely due to better quality control.Self-adhesive temperature labels have contributed to a much more reliable and accurate temperature reading. They are a more cost-effective solution than other sensors
The process of coating aluminium consists of the electrostatic application of powdered pigment to the metal’s surface. These pigments are polyester or polyurethane resins that will protect the finished profile against sunlight and corrosion caused by rain, humidity or other weather conditions that may affect it once installed. Additionally, coating offers a wide variety of paint colours that can be applied.
This process is the same whether we are coating bars, plates or whether we are coating aluminium rims. The stages of the entire process are detailed below:
It should be noted that all these processes have different temperature ranges. However, they do not cause harmful effects on the material, given the heat capacity of aluminium and its melting temperature.
After the priming stage – one of the most essential steps in aluminium coating – the profiles to be coated must be dried to remove any residues of the applied solution. The solution is washed off with water. Then, the profiles are taken to a drying oven, where they are heated to approximately 120 °C for at least 15 minutes. For the correct polymerization of the applied resin-based paints, the aluminium must be subjected to a temperature between 180 and 200 °C for 20 minutes.
Self-adhesive heat-sensitive labels allow for unassisted, high-precision control in this stage. When the aluminium is removed from the oven, we can check the temperature reached by looking at the colour variation on the different levels on the labels. Since they are irreversible labels, they mark the temperature reached in the process, and can, therefore, guarantee the result.
Once the pigments have been applied to the profiles using electrostatic guns, the powder pigment will have completely adhered to the aluminium. The proper monitoring of the melting temperature of these resins on the aluminium profiles is very important to ultimately make sure that the maximum durability of the product has been achieved. By using a self-adhesive thermal label, we can see the maximum temperature reached and thus ensure the finished profile’s excellent quality.
Self-adhesive thermal labels offer an easy, cost-effective solution to this problem. The main advantage is that, since the label is placed on the part itself, it guarantees that the reading obtained is the exact temperature the part was subjected to. This temperature can sometimes differ from that of the oven.
Temperature control systems used in the processes usually measure the heat generated inside the oven. However, making sure that this temperature is even in the entire space is quite tricky. By using thermal labels, we can check that the process is performed properly.
Before starting, it is very important to have a machine that is in good condition and properly calibrated. Only a balances combination of temperature, pressure and time can guarantee perfect adhesion of the fusible interlining. For this reason, the temperature must be checked daily on the entire area that is subjected to pressure, and every time the machine is stopped. Temperature readings are best taken when the machine is empty, before it is put into service for the day. Production should not start until this assessment has been made, and the pressure, time and temperature have been set.
There are 2 reasons why a heat-activated thermal interlining can fail:
In the manufacturing of parts, reliable temperature control is essential to ensure that the product goes through the thermal process correctly and, therefore, has the correct features that guarantee the quality of its finishing.
The problem in continuous and static ovens is the use of sensors that monitor the temperature inside the oven itself, but not the temperature of the actual part. Due to the use and wear and tear of the heating resistors, temperature variations inside the oven are quite frequent.
Also, due to wear and tear, the oven temperature sensors can perform faulty readings and need to be replaced or recalibrated.
The use of temperature indicators is a simple solution to this problem.
Irreversible temperature labels are adhesive sensors that stick to a part and permanently change colour when a specific temperature is reached. When attached to the product, these labels will give us the exact temperature to which the part has been subjected. Additionally, since they are irreversible, at the end of the process we can check if the correct temperature has been reached or not.
Using these temperature indicators makes it possible to detect problems in areas of the oven that are not properly heated, or inaccuracies of the oven’s own temperature sensors due to wear and tear. This allows us to correct the defects and guarantee the quality of the parts. Because these labels are adhesive, they can be removed later on and attached to quality reports.
During the manufacture of tyres, several thermal processes require the measurement of the working temperature.
During belt and ply calendering, when the rubber compound is applied to the beads, and when the tire is curing, it is important to control the process temperature.
However, it is during the mixing of the rubber compound where temperature monitoring is critical, as excess heat can damage it. This operation is usually carried out in two stages, the mixing stage, where the temperature ranges between 160 °C and 170 °C, and the final stage, in which the curing materials are added. This final stage cannot exceed 100 °C-110 °C to prevent the material from burning.
This process requires monitoring and recording of the temperature reached to ensure that the seals will subsequently have the appropriate hardness. The rubber seals must ensure that specific components of the car engine are hermetically sealed to prevent the leakage of the fluids involved in the proper functioning of the engine (brakes, antifreeze, etc.). The process is carried out at 120 °C, and the use of temperature indicators or crayons guarantees the final result.
There are various processes in the industry aimed at changing the properties of metal and, therefore, the characteristics of the part. Annealing is a treatment designed to increase the resistance and elasticity of the part. It is done by eliminating the internal stress that occurred in other processes like tempering.
Temperature control in annealing varies depending on the part and the use that is required. Therefore, parts that need increased hardness, such as tools, are usually subjected to temperatures of 150 °C to 220 °C. In comparison, products that need greater elasticity are subjected to temperatures between 450 °C and 600 °C.
In any of these procedures, using temperature indicators to control the temperature in the manufacture of industrial parts is the most effective way to ensure the final product’s quality.
This irreversible temperature indicator has been designed to control overheating in engine parts. It contains 4 control points changing their colour permanently when the temperature stamped on them is reached. As this change is irreversible, this indicator is able to detect whether the said temperature has been reached anytime in the area where it has...Temperature Recorder control of engine...
This product is supplied in packets with 10 thermometers. Irreversible-type temperature indicator with 8 temperature points. This is an adhesive thermometer than can be stuck on any surface or product. The points are marked with temperature in ºC and ºF.8-level irreversible thermometers (pack 10...
Circular-type irreversible temperature label. Supplied in packets with 10 units.Clock-type irreversible thermometer with 5...
Irreversible-type temperature indicator. These temperature labels are adhesive and can be stuck on any surface or product. They change to permanent colour when reaching the marked temperature.1-temperature irreversible thermometer...
Thermal pencil for controlling temperatures. These wax-based pencils with heat-sensitive ink allow to mark any surface, which will change colour depending on the temperature.Heat-sensitive pencil (10 units)