Large-scale industrial production of most plastic parts is done through the medical test for mold exposure, you know? Counting on variety, thermoplastics is easy to make with soft, hard, colored, transparent, biodegradable materials and even with texture or flavor materials.
Medical test of mold exposure due to dimensional and surface quality
This process widely uses due to its dimensional and surface quality, in addition to consider flexible and productive.
Nowadays it is practically impossible to have products that do not inject components. Moreover, to get an idea, you can find thermoplastics in household appliances, medical equipment, toys, household items, electronics, car parts and agricultural equipment.
How about knowing more about the thermoplastic injection process? That's what we're going to share in this post!
What is Medical test for mold exposure?
The so-called thermoplastic injection happens when the polymer subject to high temperatures and becomes viscous and moldable. The main objective of this process is to provide the greatest possible use with precision and agility.
Nowadays, most products made of plastic participate in this process and mold, facilitating the correct fit for which they designed. The size and dimensions may vary according to the needs of the product develop by each company.
3 initial phases of the Plastics injection process
Medical test for mold exposure carries out the process of melting the polymer and making its mold in the appropriate shape, according to the purpose of each part. The work involves 3 initial phases:
- Raw material heating
- Mold injection
- cooling
To complete the procedure and the part finally to mold, it is necessary to include closing the mold, injecting the molten material, holding, cooling, opening the mold and extracting the part.
How does thermoplastic injection work?
Through the injection machine, the plastic heats during the process. Into the nozzle attached to the form, the granulated plastic material and molds are inserted. From medical test for mold exposure, the plastic undergoes resistance at high temperatures.
However, when its couple, then it injects into the mold channels to give the required shape to the material. The molds are cooled with ice water, through an industrial water tower.
Thermoplastics injection carries out with automatic machines
The most commonly uses types of plastics today are flexible PVC, polyamide, polyacetal, polypropylene, common and impact polystyrene, and polyethylene. Moreover, thermoplastics injection carries out with machines with a clamping force of up to 300 tons.
Moreover, the thermoplastic injection process allows creating an immense variety of parts for the most diverse segments with agility and precision, having a wide possibility of dimensions to reach.
What are the steps in the Medical test for mold exposure?
The complete thermoplastic injection process is divided into 6 steps:
- Mold Closing: through the hydraulic or electrical movement of the injection machine's plates, it is possible to close the mold. Assuming that the mold is correctly closed and the injection molding plates are locked.
Most importantly, the chosen material is injected into the cavities, thus avoiding the formation of excesses and imperfections, which can occur because of the high pressure of this initial procedure.
- Dosing: the material softens here. Important to remember the dosage amount depends on the type of product selected. This step ofmedical test for mold exposuretakes place from electrical resistances in the extruder assembly of the injection molding machine, composed of a barrel and a screw.
- Filling: after the material already softens, it is necessary to make the injection in the mold cavities. To prevent the raw material flow front from freezing. This step should happen quickly.
Increase in the internal pressure of the cavities
Firstly, the amount of raw material dosed in the previous step is normally greater than the final volume of the thermoplastic. This is because the excess can cause an increase in the internal pressure of the cavities.
Therefore, in order to minimize the contraction of the medical test for mold exposure at the time of cooling, the holding allows the maintenance of pressure during the procedure. Moreover, to reduce the possibility of defects called “shrinks”, this phase seeks to make the filling completely homogeneous.
The cooling process to accelerate this penultimate step
Immediately, after dosing the raw material into the cavities, the cooling process starts. In general, the molds have cooling circuits, which is a system with water circulation to accelerate this penultimate step. After that, the plastic material becomes solid, acquiring the final shape of the desired product.
Through internal mechanisms of the Medical test for mold exposure itself, the product extract, now cool. This final step can happen through extractor pins, extractor plate, jaws and other mechanisms.
Thermoplastic injection process requires preparation and training.
Programming requires important knowledge, considering the pressure exerts, as well as speed and time. Otherwise, errors may occur that cause mold and machine mechanism breakage.
Check out 3 tips that interfere with quality
Secondly, there are three factors that can directly influence the quality of the final product made through a medical test for mold exposure like the one uses for thermoplastics: mold, material (raw material) and process itself. And this all relate to mold protection adjustment, as we will see next.
- Check the position of the mold: it is important that everything is in the correct position. The mold position needs to adjust according to the instructions.
- Adjust the pressure: too high pressure can cause the mold to crush. The suggestion is to keep the pressure lower.
- Adjust the speed: the speed should be as high as possible, considering the details of the mold. With this, it is possible to work with more speed and less pressure.
Remember: Medical test for mold exposure in the adjustment helps to protect the mold, and this is fundamental for the care and attention in the thermoplastic injection process.
Allow the correct use to avoid the waste
Thirdly, knowing the details of the procedure and its operation allow the correct use, providing quality of the final product and avoiding waste.
Moreover, the plastic market quite resilient compare to other sectors of the economy, and therefore, it has been significantly recovering its production, after the effects causes by the crisis, especially in 2016.
The year 2019 proves to be very promising, both that the sector expects a growth of more than 2.5% in the production of thermoplastics.
Qualified professionals to conduct efficient management
In conclusion, medical test for mold exposure is a fundamental point, because a team determine. It is to develop process improvements through actions, planning and innovations will have a more effective performance. Moreover, this makes the scenario more conducive to development, and of course, to growth.
