Bringing perfect optical properties to micro applications
Micro injection-compression molding
Optical functions in particular are becoming increasingly miniaturized. A well-known example from everyday life is the integrated camera in every modern smartphone. This miniaturization is only made possible by high-precision micro-optics made of plastic. For micro-optics with high image quality, such as for demanding applications in measurement and medical technology, component stresses are often difficult to control. Internal stresses and molecular orientations in injection molded plastic optics cause birefringence effects that lead to unwantes polarization and thus transmission effects. This problem can be eliminated, as in the injection molding of "large" components, by a superimposed injection-compression process. In a partially opened mold, a defined preform is generated within the cavity and then formed into the finished part by means of a compression molding process. Due to the uniform pressure distribution throughout the cavity, internal stresses and thus anisotropic optical properties are reduced to a minimum.
The technological basis for micro injection compression molding of the smallest optical components is the formicaPlast modular machine platform with two piston injection units, which was developed at KUZ for micro injection molding. A vertical machine design with electric drives meets the requirements of the process control necessary for this application. Short cycle times and long flow paths are achieved at low pressure levels.
- Feasibility analyses
- design of the micro-molded part to suit the molded part
- material-optimized design of the molded part
- process and load simulation
- mold design, construction and production
- automation solutions for manufacturing
- Molded part and molded part design
- Technology consulting for your application
- Mold design
- Automation in the manufacturing process
- Molded part testing
- Tool sampling
- Prototype production
- Small batch production
- Construction of prototype tools
- Construction of series tools
- Molding measurement - tactile, optical, CT
- Testing strategy in series production
- Determination of mechanical material properties
29.11. - 30.11.2023
Rheology and thermal analysis
The description of the material properties of plastics is essential for the design of processing procedures and for quality assurance. Rheometric investigations can be used to characterize the flow and deformation behavior of thermoplastic polymers and to better understand their structure-viscosity behavior during processing. The test methods of thermal analysis open up the possibility of identifying relationships between processing conditions, microstructure and material properties of plastics. In this way, polymers can be identified and processing-related material damage can be detected. In this seminar, the theoretical fundamentals of rheology and thermal analysis are combined with practical demonstrations of the equipment in the laboratory and pilot plant. Concrete application examples from the practice of the accredited testing laboratory at the KUZ will be used to show what information can be obtained from the recorded measurement curves. For more information on the agenda, how to get there, parking facilities and an insight into the script, please see our download box at the top right.
Plastic innovatively shaped
Injection molding, along with other major plastics processing methods, is one of the most widely used primary molding processes.