Firstly, Plastic injection molding factory usa another major breakthrough in the field of biotechnology has made adjustments to the purity and accuracy of injection molding of polymer materials for medical equipment.
Clean injection molding machines - sterile products
Secondly, the determining criteria for casting quality are not only the maximum allowable number and size of inorganic particles on the product, but also colonies of microorganisms.
The starting point for casting elements of medical technology is the systematic control of particle emitters inside the injection molding machine and in the space adjacent to it.
Furthermore, the most important requirement for clean room injection molding machines is to keep within predetermined limits the emission of particles. It can cause contamination of the plastic products being produced.
Mold blowing requirements
Plastic injection molding factory usa An important point among the requirements for the room is to ensure optimal movement of air flows in the area of the mold.
At the same time, in order to minimize turbulent flows that leads to a local concentration of particles, the following use:
- Non-column joint of injection molding machine;
Advanced guards that provide ideal conditions for purging the clamping unit with clean air through the laminar airflow LMP module;
Complete insulation of the movable plate guides.
The greatest danger of contamination associates with the installation of the mold. Similarly, it usually installs from above using a gantry crane. As well as, it can rarely use in cleanrooms due to the limited height and special design of the ceilings. An effective solution is to install the injection mold from the side on column less injection molding machines.
Further, the innovative Acemold technology has a high chance of success and gives a new impetus to the development of new types of products for pharmacology.
Isolation of raw materials and hydraulics
Plastic injection molding factory usa rupture and friction in the pipelines of the raw material supply systems to the plasticizing unit are eliminated by choosing extra-strong hoses and laying them without bends.
The hydraulic system and the oil tank must “breathe”, therefore they isolate using a special bellows. Servo motors without fans use. The aerodynamically optimized guards can be easily opened at any point, eliminating dead spots.
In addition, the release of gaseous substances from the polymer in the nozzle area blocks. The material cylinder, together with the nozzle and electric heating tapes, completely places in a two-chamber tube.
This molding concept guarantees compliance with GMP rules for the supervision of the quality of medicines.
Plastic injection molding factory usa Production of injection molding products
Further, powder Injection Molding (called PIM) combines the advantages of practical materials such as ceramics and metals with those of injection molding. Casting powder technology produces massive parts from ceramic alloys with zirconium oxide or aluminum oxide, as well as products from low-alloy, heat-resistant or stainless steels, tool steel, soft magnetic and other special alloys.
The areas of application of parts manufactured using PIM technology determine mainly by the properties of the processed raw materials, namely:
- high chemical resistance;
- good friction data and wear resistance in dry friction;
- ample opportunities to impart the desired organoleptic properties (shiny and pleasant to the touch products, painted in different colors);
- good hardness;
- Plastic injection molding factory usahas magnetic properties;
- High heat resistance and similar thermal expansion rates of ceramics and steel.
Plastic injection molding parts
Moreover, Plastic injection molding factory usa parts uses in communication technology and automotive industry (panels and cases with decorative design), mechatronics and drive devices (bearings, worms, magnetic valves) plus medical technology (jet and dosing elements).
The complex of important properties of raw materials complements and enhanced by the advantages of injection molding:
- freely giving any three-dimensional shape;
- by combining different manufacturing methods (two-component casting, DVF);
- Process reliability.
The powder casting process includes:
- preparation of a highly particle-filled metal or ceramic polymer material;
- processing it by injection molding (Grueling);
- polymer removal and sintering;
- Finishing operations such as abrasive tumbling, grinding, printing, firing or laser processing.
The Plastic injection molding factory usa control of the process is particularly dependent on the strict conformity of the configuration and design of the mold to the requirements. As well as it is ensuring the consistency of the processes of injection molding
Preparation of raw materials for casting
An obligatory criterion for the correct preparation of raw materials for casting into molds is the strict observance of the drying prescription. Eventually, the high moisture content of the material leads to gray schlivers, underflows or bubbles on the surface of plastic products. Plastic injection molding factory usa Under unfavorable storage, even a non-hygroscopic polymer can absorb large amounts of moisture.
Furthermore, it is necessary to pre-dry the thermoplastics with precise exposure time and temperature. It is possible to determine the probability of high moisture content of the raw material by idle extrusion of the melt from the material cylinder, at the minimum injection speed. The jet of wet polymer will be a bubbly and non-shiny structure.
Drying conditions for some thermoplastics
Generally, drying of thermoplastics ABS+PC, Drying temperature 100-110°C. Drying time in a convection dryer 4-8 hours; in an air dryer (with intensive circulation) and in a dry air dryer - from 2 to 4 hours.
- Dry at 80°C for 2 to 6 hours, depending on the type of dryer
- Polyamide PA. Dry for 2 to 4 hours at 80°C.
- Polystyrene, drying for one hour at a temperature of 75-85°C (depending on the initial humidity).
Plastic injection molding factory usa Drying phases
Heated dry air enters from the outlet nozzle and evenly passes from the bottom up through the granules. At the same time, it takes moisture from granulate and moves it into the first adsorption tank. In it, the adsorbent takes moisture.
When the adsorbent saturates with moisture, the mixing valves switch to the second tank. Moreover, it is not saturated with moisture, and the drying process can continue continuously.
In fact, while drying in vessel number 1 is being carried out, the adsorbent in vessel number 2 is being regenerated. Furthermore, the regenerative blower and heating blow hot air through the saturated desiccant and extract it.
Conclusion plastic injection molding factory usa
If little or no material is taken from one or the other drying tank, the heat leaves the system unused after a while. The latest modules equip with energy- saving program that closes the damper and prevents heat loss.
When the heat reaches the top edge of the material funnel, the sensors check the after drying. Plastic injection molding factory usa requires ensuring dense packaging of raw materials so that it does not lose its quality again.