Double forming disc round forming provides a good example for the extended application of screw technology

The twin-screw sandwich extrusion molding technology offers several innovative features. First, in addition to the extrusion of material through the two barrels, the twin-screw system can be designed with a special single-flight, variable-diameter, and variable-pitch double-disc structure. This design allows for efficient extrusion, shaping, and forming, serving as an excellent example of how screw technology can be applied in epitaxial processes. The double-disc configuration enhances the precision and consistency of the final product, making it ideal for complex applications.

Second, the parallel sandwich extrusion from the two material cylinders—essentially filling the inner layer to create a sandwich structure—is a clever approach that sets a strong foundation for future designs, particularly in three-cylinder systems that require floating ball sandwich formation. This method not only improves efficiency but also introduces new possibilities in the design of multi-layered food products.

Third, the mechanism involved in this process is more complex, requiring precise transmission systems and coordinated movements. It is primarily suited for dough-like materials rather than semi-fluid or softer foods commonly found in confectionery. Due to their high moisture content and soft texture, these materials are difficult to shape using traditional extrusion methods, which limits the application of this technology in certain areas of the food industry.

In contrast, cast-molded forming uses a plunger (or piston) to extrude both the outer skin and the filling, with the casting process being carried out through a specially designed casting device. As seen in the classification of sandwiches, traditional sandwich molding techniques have largely focused on pasta-based products. However, when it comes to fluid or semi-fluid materials used in confectionery, the technology remains underdeveloped. These materials tend to be more moist, softer, and prone to sticking, making them unsuitable for conventional shaping methods. Therefore, casting becomes the preferred technique, which places higher demands on the structural design of the casting equipment.

This casting method not only provides practical solutions for handling delicate materials but also serves as a valuable source of inspiration for future design innovations. By learning from these techniques, engineers and designers can develop more efficient and adaptable systems for producing a wider range of food products.

Holographic Grating

They are widely used for applications in optical communications,biotechnology, colorimetry,chromatography,and medical instrumentation.

Handling Gratings: Gratings require special handling, making them prone to fingerprints and aerosols. Gratings should only be handled by the edges.

Holographic gratings:
Specifications:
Ruled area: <=70 * 70mm 
Wavelength range: 0.2-0.8um 
Grooves per mm: 1,200 to 3,600L/mm
Diffraction: >70% 
Ruled gratings:
Specifications:
Ruled area: <=70 * 70mm 
Wavelength range: 0.2-15um 
Grooves per mm: 50 to 2,400L/mm 
Diffraction: >70%
Concave gratings:
Specifications:
Ruled area: <=70 * 70mm 
Wavelength range: 200 to 900um 
Grooves per mm: 490 to 1,200L/mm 
Diffraction: >70%

Holographic Grating,Holographic Blazed Grating,Holographic Concave Grating,Aberration-Corrected Holographic Grating

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