In optical products, optical retrofitting equipment manufacturers do not first have to choose a particular ready-made model, but rather identify PC or PMMA, transparency, stress and black spots. This step determines whether the subsequent spiral diameter, structure and material grade are well founded.

The name of the industry itself is not an optional parameter, but it points to a quality focus and production rhythm. Car projects focus on long-term stabilization and traceability, medical projects on cleanliness, packaging projects on high speed, optical items on low pollution and low stress. Plant manufacturers should translate these industry requirements into verifiable screw and process indicators. Site information should preferably include both photographs, short videos and data sheets. Photos are used to identify machine interfaces, screw tails and front-end components, video can be observed to measure, buffer and abnormal sound, and data tables are used to calculate the rate of application, the need for plasticization per hour and the length of stay. If only partial information can be obtained, a list should be provided for confirmation, rather than a tentative condition being a definitive conclusion.

Material analysis cannot remain under PPP, ABS or PA names. The specific plate number, the percentage of the product or mineral filling, the flame-retarding system, the water-bearing requirements, the permitted stay time and the recommended processing temperature should be checked. Differences in the sensitivity of viscosity, wear, corrosiveness and shearing may be apparent in the broad categories of the same material, which change the compression ratio, the three-part ratio, alloy and surface treatment. The focus of the discussion here is on PC or PMMA, transparency, stress and black spots, which must correspond to the customer ' s current production conditions and not be limited to the maximum values in machine samples.

In the context of this project, it is proposed to adopt the concept of “low-cut and cleaner structures with precision temperature control”. First, to determine whether the available data support the choice, then to calculate the volume of reductive, pressure and plasticization, and finally to discuss the geometry, front-end components and material handling of the screws. If the standard formula is able to cover the window, priority should be given to the standard configuration; if overheating, remnant and pollution would directly cause the risk of deformation, the dedicated structure is presented and the increased costs, delivery periods and expected benefits are indicated.

If they are placed on an empirically quick basis, overheating, retorture and pollution are likely to result in direct loss of appearance. The success of a single test module does not represent long-term stability, particularly for projects with high filling, high temperature, frequent colour change or multi-molecular co-plasms, and needs to look at changes in batches of material, the length of continuous production and the accumulation of wear and tear.

At the time of acceptance, it is recommended that the main indicator be the perforation rate, double refraction and black dots, and that the temperature of the drums be synchronized with the rate, screw velocity, back pressure, measurement position, buffer position, injection peak pressure and continuous sample weight. At least three reasonable process points, low, medium and high, are covered to confirm that the programme is not effective under a single parameter. For aluminum manufacturers and vendors, professionalism is reflected in the ability to translate the client language into engineering parameters and to interpret the programme into production, quality, maintenance and cost results that the client can understand. The establishment of standard processes around optical products will not only improve the accuracy of this selection, but also create reusable machine and application databases.