When the project involves medical consumables, the screwdriver programme must start from the point of view of the customer ' s real production tasks. Medical retrofit machines need to make clean, clean, low-suspension, material compliance and retrospectively organized as a set of verifiable, calculable and retroactive entry conditions.

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. It is recommended that customer information be broken down into five groups: products and moulds, raw materials, platforms, process objectives and existing problems. Product end logs of single weight, flowway, number of caves, wall thickness and appearance levels; ratio of feedstock end recorder number, melting finger, filling, flame retardation and retrofitting; terminal logs of tonnage, voltage, screw diameter, maximum travel, injection pressure and plasticization. All data are sourced and are marked, drawn, physical, measured or estimated by clients.

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. The focus of discussion in this paper is clean, clean, low-suspension, material compliance and traceability, which must correspond to the customer ' s current production conditions and not be limited to the maximum values in machine samples.

From a sales management point of view, the selection of cleaner structures and the establishment of material switching procedures should constitute a standard process that can be used again. Each project saves original needs, computations, final drawings, test modelling data and client feedback, and can call on experience in the event of a similar machine or material, but there is still a need to reconcile key differences and not to copy the historical configuration directly.

If they are placed on an empirically quick basis, it is likely that dead ends and residues will increase pollution and certification difficulties. 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 primary indicator be particulate contamination, clean validation and batch stabilization, and that the temperature of the drums be simultaneously recorded, screw speed, 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. Medical consumables should therefore not follow the simple logic of “symmetrically-sized screws”. Only by accounting for products, feedstocks, tonnages, voltage, screw diameter and target cycles will the standard screws have a clear scope of application and the dedicated screws have a reasonable design basis and return on investment.